Updated on 2024/04/26

写真a

 
MIYASHITA Akinori
 
Organization
Brain Research Institute Center for Bioresources Associate Professor
Title
Associate Professor
External link

Degree

  • 博士(理学) ( 2000.3   新潟大学 )

Research Interests

  • APOE

  • FUS

  • transcriptome

  • omics

  • disease susceptibility genes

  • SORL1

  • TREM2

  • frontotemporal lobar degeneration

  • single nucleotide variants

  • microsatellite markers

  • Microsatellite

  • SNP<sub>s</sub>

  • Alzheimer's disease

  • genome

  • SNP

  • dementia

  • Neurodegenerative disease

  • amyotrophic lateral sclerosis

  • phase separation

  • human post-mortem brains

  • case-control study

  • association study

  • GWAS

  • Stress granules

  • RNA binding proteins

Research Areas

  • Life Science / Medical biochemistry  / neurodegenerative diseases

  • Life Science / Neurology  / neurodegenerative disease

  • Life Science / Neuroscience-general

  • Life Science / Genome biology

  • Life Science / Genetics

Research History (researchmap)

  • Niigata University   Department of Molecular Genetics, Brain Research Institute   Associate Professor

    2018.4

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  • University of Toronto   Tanz Centre for Research in Neurodegenerative Diseases   Postdoctoral Research Fellow

    2014.4 - 2017.3

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  • Niigata University   Department of Molecular Genetics, Brain Research Institute   Assistant Professor

    2006.4 - 2018.3

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  • Niigata University   Department of Molecular Genetics, Brain Research Institute   Research Associate

    2002.4 - 2006.3

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  • Niigata University   Genetic Research Facility   Research Associate

    2000.4 - 2002.3

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Research History

  • Niigata University   Brain Research Institute Center for Bioresources   Associate Professor

    2018.4

  • Niigata University   Brain Research Institute Center for Bioresources   Assistant Professor

    2002.4 - 2018.3

Education

  • Niigata University   Graduate School, Division of National Science and Technology   Doctoral program

    1997.4 - 2000.3

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  • Niigata University   Graduate School of Science and Technology   Master’s program

    1995.4 - 1997.3

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    Country: Japan

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  • Niigata University   Faculty of Science   Department of Biology

    1991.4 - 1995.3

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    Country: Japan

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Committee Memberships

  • 日本認知症学会   代議員  

    2021.11   

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Studying abroad experiences

  • Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto   Postdoctoral research fellow

    2014.4 - 2017.3

 

Papers

  • Polygenic effects on the risk of Alzheimer’s disease in the Japanese population

    Masataka Kikuchi, Akinori Miyashita, Norikazu Hara, Kensaku Kasuga, Yuko Saito, Shigeo Murayama, Akiyoshi Kakita, Hiroyasu Akatsu, Kouichi Ozaki, Shumpei Niida, Ryozo Kuwano, Takeshi Iwatsubo, Akihiro Nakaya, Takeshi Ikeuchi, Michael W. Weiner, Sara S. Mason, Colleen S. Albers, David Knopman, Kris Johnson, Paul Aisen, Ronald Petersen, Clifford R. Jack, William Jagust, John Q. Trojanowki, Arthur W. Toga, Lon S. Schneider, Sonia Pawluczyk, Mauricio Beccera, Liberty Teodoro, Bryan M. Spann, Laurel Beckett, Robert C. Green, John Morris, Leslie M. Shaw, Beau Ances, John C. Morris, Maria Carroll, Mary L. Creech, Erin Franklin, Mark A. Mintun, Stacy Schneider, Angela Oliver, Jeffrey Kaye, Joseph Quinn, Lisa Silbert, Betty Lind, Raina Carter, Sara Dolen, James Brewer, Helen Vanderswag, Adam Fleisher, Judith L. Heidebrink, Joanne L. Lord, Rachelle S. Doody, Javier Villanueva-Meyer, Munir Chowdhury, Susan Rountree, Mimi Dang, Yaakov Stern, Lawrence S. Honig, Karen L. Bell, Daniel Marson, Randall Griffith, David Clark, David Geldmacher, John Brockington, Erik Roberson, Marissa Natelson Love, Hillel Grossman, Effie Mitsis, Raj C. Shah, Leyla deToledo-Morrell, Ranjan Duara, Daniel Varon, Maria T. Greig, Peggy Roberts, Marilyn Albert, Chiadi Onyike, Daniel D’Agostino, Stephanie Kielb, James E. Galvin, Brittany Cerbone, Christina A. Michel, Dana M. Pogorelec, Henry Rusinek, Mony J. de Leon, Lidia Glodzik, Susan De Santi, P. Murali Doraiswamy, Jeffrey R. Petrella, Salvador Borges-Neto, Terence Z. Wong, Edward Coleman, Charles D. Smith, Greg Jicha, Peter Hardy, Partha Sinha, Elizabeth Oates, Gary Conrad, Anton P. Porsteinsson, Bonnie S. Goldstein, Kim Martin, Kelly M. Makino, M. Saleem Ismail, Connie Brand, Ruth A. Mulnard, Gaby Thai, Catherine Mc-Adams-Ortiz, Kyle Womack, Dana Mathews, Mary Quiceno, Allan I. Levey, James J. Lah, Janet S. Cellar, Jeffrey M. Burns, Russell H. Swerdlow, William M. Brooks, Liana Apostolova, Martin R. Farlow, Ann Marie Hake, Brandy R. Matthews, Jared R. Brosch, Scott Herring, Cynthia Hunt, Kathleen Tingus, Ellen Woo, Daniel H. S. Silverman, Po H. Lu, George Bartzokis, Neill R. Graff-Radford, Francine Parfitt, Tracy Kendall, Heather Johnson, Christopher H. van Dyck, Richard E. Carson, Martha G. MacAvoy, Pradeep Varma, Howard Chertkow, Howard Bergman, Chris Hosein, Sandra Black, Bojana Stefanovic, Curtis Caldwell, Ging-Yuek Robin Hsiung, Howard Feldman, Benita Mudge, Michele Assaly, Elizabeth Finger, Stephen Pasternack, Irina Rachisky, Dick Trost, Andrew Kertesz, Charles Bernick, Donna Munic, Marek Marsel Mesulam, Kristine Lipowski, Sandra Weintraub, Borna Bonakdarpour, Diana Kerwin, Chuang-Kuo Wu, Nancy Johnson, Carl Sadowsky, Teresa Villena, Raymond Scott Turner, Kathleen Johnson, Brigid Reynolds, Reisa A. Sperling, Keith A. Johnson, Gad Marshall, Jerome Yesavage, Joy L. Taylor, Barton Lane, Allyson Rosen, Jared Tinklenberg, Marwan N. Sabbagh, Christine M. Belden, Sandra A. Jacobson, Sherye A. Sirrel, Neil Kowall, Ronald Killiany, Andrew E. Budson, Alexander Norbash, Patricia Lynn Johnson, Thomas O. Obisesan, Saba Wolday, Joanne Allard, Alan Lerner, Paula Ogrocki, Curtis Tatsuoka, Parianne Fatica, Evan Fletcher, Pauline Maillard, John Olichney, Charles DeCarli, Owen Carmichael, Smita Kittur, Michael Borrie, T.-Y. Lee, Rob Bartha, Sterling Johnson, Sanjay Asthana, Cynthia M. Carlsson, Steven G. Potkin, Adrian Preda, Dana Nguyen, Pierre Tariot, Anna Burke, Nadira Trncic, Stephanie Reeder, Vernice Bates, Horacio Capote, Michelle Rainka, Douglas W. Scharre, Maria Kataki, Anahita Adeli, Earl A. Zimmerman, Dzintra Celmins, Alice D. Brown, Godfrey D. Pearlson, Karen Blank, Karen Anderson, Laura A. Flashman, Marc Seltzer, Mary L. Hynes, Robert B. Santulli, Kaycee M. Sink, Leslie Gordineer, Jeff D. Williamson, Pradeep Garg, Franklin Watkins, Brian R. Ott, Henry Querfurth, Geoffrey Tremont, Stephen Salloway, Paul Malloy, Stephen Correia, Howard J. Rosen, Bruce L. Miller, David Perry, Jacobo Mintzer, Kenneth Spicer, David Bachman, Nunzio Pomara, Raymundo Hernando, Antero Sarrael, Norman Relkin, Gloria Chaing, Michael Lin, Lisa Ravdin, Amanda Smith, Balebail Ashok Raj, Kristin Fargher, Takashi Asada, Hiroyuki Arai, Morihiro Sugishita, Hiroshi Matsuda, Noriko Sato, Hajime Sato, Kengo Ito, Teruhiko Kachi, Kenji Toba, Michio Senda, Kenji Ishii, Shun Shimohama, Masaki Saitoh, Rika Yamauchi, Takashi Hayashi, Chiyoko Takanami, Seiju Kobayashi, Norihito Nakano, Junichiro Kanazawa, Takeshi Ando, Masato Hareyama, Masamitsu Hatakenaka, Eriko Tsukamoto, Shinji Ochi, Mikio Shoji, Etsuro Matsubara, Takeshi Kawarabayashi, Yasuhito Wakasaya, Takashi Nakata, Naoko Nakahata, Shuichi Ono, Yoshihiro Takai, Satoshi Takahashi, Hisashi Yonezawa, Junko Takahashi, Masako Kudoh, Kuniko Ueno, Hiromi Sakashita, Kuniko Watanabe, Makoto Sasaki, Yutaka Matsumura, Yohsuke Hirata, Tsuyoshi Metoki, Susumu Hayakawa, Yuichi Sato, Masayuki Takeda, Koichiro Sera, Kazunori Terasaki, Toshiaki Sasaki, Yoshihiro Saitoh, Shoko Goto, Ken Nagata, Tetsuya Maeda, Yasushi Kondoh, Takashi Yamazaki, Daiki Takano, Mio Miyata, Hiromi Komatsu, Mayumi Watanabe, Tomomi Sinoda, Rena Muraoka, Kayoko Kikuchi, Hitomi Ito, Aki Sato, Toshibumi Kinoshita, Hideyo Toyoshima, Kaoru Sato, Shigeki Sugawara, Isao Ito, Fumiko Kumagai, Katsutoshi Furukawa, Masaaki Waragai, Naoki Tomita, Mari Ootsuki, Katsumi Sugawara, Satomi Sugawara, Nobuyuki Okamura, Shunji Mugikura, Atsushi Umetsu, Takanori Murata, Tatsuo Nagasaka, Yukitsuka Kudo, Manabu Tashiro, Shoichi Watanuki, Masatoyo Nishizawa, Takayoshi Tokutake, Saeri Ishikawa, Emiko Kishida, Nozomi Sato, Mieko Hagiwara, Kumi Yamanaka, Takeyuki Watanabe, Taeko Takasugi, Shoichi Inagawa, Kenichi Naito, Masanori Awaji, Tsutomu Kanazawa, Kouiti Okamoto, Masaki Ikeda, Yuiti Tasiro, Syunn Nagamine, Sathiko Kurose, Tsuneo Yamazaki, Shiori Katsuyama, Sayuri Fukushima, Etsuko Koya, Makoto Amanuma, Kouiti Ujita, Kazuhiro Kishi, Kazuhisa Tuda, Noboru Oriuti, Katsuyoshi Mizukami, Tetsuaki Arai, Etsuko Nakajima, Katsumi Miyamoto, Tomoya Kobayashi, Saori Itoya, Jun Ookubo, Toshiya Akatsu, Yoshiko Anzai, Junya Ikegaki, Yuuichi Katou, Kaori Kimura, Hajime Saitou, Kazuya Shinoda, Satoka Someya, Hiroko Taguchi, Kazuya Tashiro, Masaya Tanaka, Tatsuya Nemoto, Ryou Wakabayashi, Daisuke Watanabe, Kousaku Saotome, Ryou Kuchii, Harumasa Takano, Tetsuya Suhara, Hitoshi Shinoto, Hitoshi Shimada, Makoto Higuchi, Takaaki Mori, Hiroshi Ito, Takayuki Obata, Yoshiko Fukushima, Kazuko Suzuki, Izumi Izumida, Katsuyuki Tanimoto, Takahiro Shiraishi, Hitoshi Shinotoh, Junko Shiba, Hiroaki Yano, Miki Satake, Aimi Nakui, Yae Ebihara, Tomomi Hasegawa, Yasumasa Yoshiyama, Mami Kato, Yuki Ogata, Hiroyuki Fujikawa, Nobuo Araki, Yoshihiko Nakazato, Takahiro Sasaki, Tomokazu Shimadu, Kimiko Yoshimaru, Etsuko Imabayashi, Asako Yasuda, Keiko Ozawa, Etuko Yamamoto, Natsumi Nakamata, Noriko Miyauchi, Rieko Hashimoto, Taishi Unezawa, Takafumi Ichikawa, Hiroki Hayashi, Masakazu Yamagishi, Tunemichi Mihara, Masaya Hirano, Shinichi Watanabe, Junichiro Fukuhara, Hajime Matsudo, Nobuyuki Saito, Atsushi Iwata, Hisatomo Kowa, Toshihiro Hayashi, Ryoko Ihara, Toji Miyagawa, Mizuho Yoshida, Yuri Koide, Eriko Samura, Kurumi Fujii, Kaori Watanabe, Nagae Orihara, Toshimitsu Momose, Miwako Takahashi, Takuya Arai, Yoshiki Kojima, Akira Kunimatsu, Harushi Mori, Masami Goto, Takeo Sarashina, Syuichi Uzuki, Seiji Katou, Yoshiharu Sekine, Yukihiro Takauchi, Chiine Kagami, Kazutomi Kanemaru, Yasushi Nishina, Maria Sakaibara, Yumiko Okazaki, Rieko Okada, Maki Obata, Masaki Takao, Yuko Iwata, Mizuho Minami, Yasuko Hanabusa, Hanae Shingyouji, Kyoko Tottori, Aya Tokumaru, Makoto Ichinose, Kazuya Kume, Syunsuke Kahashi, Kunimasa Arima, Shin Tanaka, Yuko Nagahusa, Masuhiro Sakata, Mitsutoshi Okazaki, Maki Yamada, Tadashi Tukamoto, Tiine Kodama, Tomoko Takeuchi, Keiichiro Ozawa, Yoshiko Kawaji, Kyouko Tottori, Yasuhiro Nakata, Satoshi Sawada, Makoto Mimatsu, Daisuke Nakkamura, Takeshi Tamaru, Shunichirou Horiuchi, Heii Arai, Tsuneyoshi Ota, Aiko Kodaka, Yuko Tagata, Tomoko Nakada, Eizo Iseki, Kiyoshi Sato, Hiroshige Fujishiro, Norio Murayama, Masaru Suzuki, Satoshi Kimura, Masanobu Takahashi, Haruo Hanyu, Hirofumi Sakurai, Takahiko Umahara, Hidekazu Kanetaka, Kaori Arashino, Mikako Murakami, Ai Kito, Seiko Miyagi, Kaori Doi, Kazuyoshi Sasaki, Mineo Yamazaki, Akiko Ishiwata, Yasushi Arai, Akane Nogami, Sumiko Fukuda, Koichi Kozaki, Yukiko Yamada, Sayaka Kimura, Ayako Machida, Kuninori Kobayashi, Hidehiro Mizusawa, Nobuo Sanjo, Mutsufusa Watanabe, Takuya Ohkubo, Hiromi Utashiro, Yukiko Matsumoto, Kumiko Hagiya, Yoshiko Miyama, Hitoshi Shibuya, Isamu Ohashi, Akira Toriihara, Takako Shinozaki, Haruko Hiraki, Shinichi Ohtani, Toshifumi Matsui, Tomomi Toyama, Hideki Sakurai, Kumiko Sugiura, Yu Hayasaka, Hirofumi Taguchi, Shizuo Hatashita, Akari Imuta, Akiko Matsudo, Daichi Wakebe, Hideki Hayakawa, Mitsuhiro Ono, Takayoshi Ohara, Yukihiko Washimi, Yutaka Arahata, Akinori Takeda, Akiko Yamaoka, Masashi Tsujimoto, Takiko Kawai, Ai Honda, Yoko Konagaya, Hideyuki Hattori, Kenji Yoshiyama, Rina Miura, Takashi Sakurai, Miura Hisayuki, Hidetoshi Endou, Syousuke Satake, Young Jae Hong, Katsunari Iwai, Masaki Suenaga, Sumiko Morita, Kengo Itou, Takashi Kato, Ken Fujiwara, Rikio Katou, Mariko Koyama, Naohiko Fukaya, Akira Tsuji, Hitomi Shimizu, Hiroyuki Fujisawa, Tomoko Nakazawa, Satoshi Koyama, Takanori Sakata, Masahito Yamada, Mitsuhiro Yoshita, Miharu Samuraki, Kenjiro Ono, Moeko Shinohara, Yuki Soshi, Kozue Niwa, Chiaki Doumoto, Mariko Hata, Miyuki Matsushita, Mai Tsukiyama, Nozomi Takeda, Sachiko Yonezawa, Ichiro Matsunari, Osamu Matsui, Fumiaki Ueda, Yasuji Ryu, Masanobu Sakamoto, Yasuomi Ouchi, Yumiko Fujita, Madoka Chita, Rika Majima, Hiromi Tsubota, Umeo Shirasawa, Masashi Sugimori, Wataru Ariya, Yuuzou Hagiwara, Yasuo Tanizaki, Hidenao Fukuyama, Shizuko Tanaka-Urayama, Shin-Ichi Urayama, Ryosuke Takahashi, Kengo Uemura, Hajime Takechi, Chihiro Namiki, Takeshi Kihara, Hiroshi Yamauchi, Emiko Maeda, Natsu Saito, Shiho Satomi, Konomi Kabata, Tomohisa Okada, Koichi Ishizu, Shigeto Kawase, Satoshi Fukumoto, Masanori Nakagawa, Masaki Kondo, Fumitoshi Niwa, Toshiki Mizuno, Yoko Oishi, Mariko Yamazaki, Daisuke Yamaguchi, Takahiko Tokuda, Kyoko Ito, Yoku Asano, Chizuru Hamaguchi, Kei Yamada, Chio Okuyama, Kentaro Akazawa, Shigenori Matsushima, Takamasa Matsuo, Toshiaki Nakagawa, Takeshi Nii, Takuji Nishida, Kuniaki Kiuchi, Masami Fukusumi, Hideyuki Watanabe, Toshiaki Taoka, Akihiro Nogi, Masatoshi Takeda, Toshihisa Tanaka, Hiroaki Kazui, Takashi Kudo, Masayasu Okochi, Takashi Morihara, Shinji Tagami, Masahiko Takaya, Tamiki Wada, Mikiko Yokokoji, Hiromichi Sugiyama, Daisuke Yamamoto, Keiko Nomura, Mutsumi Tomioka, Naoyuki Sato, Noriyuki Hayashi, Shuko Takeda, Eiichi Uchida, Yoshiyuki Ikeda, Mineto Murakami, Takami Miki, Hiroyuki Shimada, Suzuka Ataka, Akitoshi Takeda, Yuki Iwamoto, Motokatsu Kanemoto, Jun Takeuchi, Rie Azuma, Naomi Tagawa, Junko Masao, Yuka Matsumoto, Yuko Kikukawa, Hisako Fujii, Junko Matsumura, Susumu Shiomi, Joji Kawabe, Yoshihiro Shimonishi, Mitsuji Higashida, Tomohiro Sahara, Takashi Yamanaga, Yukio Miki, Shinichi Sakamoto, Hiroyuki Tsushima, Kiyoshi Maeda, Yasuji Yamamoto, Kazuo Sakai, Haruhiko Oda, Yoshihiko Tahara, Toshio Kawamata, Taichi Akisaki, Mizuho Adachi, Masako Kuranaga, Sachi Takegawa, Seishi Terada, Yuki Kishimoto, Naoya Takeda, Nao Imai, Mayumi Yabe, Reiko Wada, Takeshi Ishihara, Hajime Honda, Osamu Yokota, Kentaro Ida, Daigo Anami, Seiji Inoue, Toshi Matsushita, Shinsuke Hiramatsu, Hiromi Tonbara, Reiko Yamamoto, Kenji Nakashima, Kenji Wada-Isoe, Saori Yamasaki, Eijiro Yamashita, Yu Nakamura, Ichiro Ishikawa, Sonoko Danjo, Tomomi Shinohara, Yuka Kashimoto, Miyuki Ueno, Yoshihiro Nishiyama, Yuka Yamamoto, Narihide Kimura, Kazuo Ogawa, Yasuhiro Sasakawa, Takashi Ishimori, Yukito Maeda, Tatsuo Yamada, Shinji Ouma, Aika Fukuhara-Kaneumi, Nami Sakamoto, Rie Nagao, Kengo Yoshimitsu, Yasuo Kuwabara, Ryuji Nakamuta, Minoru Tanaka, Manabu Ikeda, Yuusuke Yatabe, Mamoru Hashimoto, Keiichirou Kaneda, Kazuki Honda, Naoko Ichimi, Mariko Morinaga, Miyako Noda, Fumi Akatuka, Mika Kitajima, Toshinori Hirai, Shinya Shiraishi, Naoji Amano, Shinsuke Washizuka, Tetsuya Hagiwara, Yatsuka Okada, Tomomi Ogihara, Toru Takahashi, Shin Inuzuka, Nobuhiro Sugiyama, Takehiko Yasaki, Minori Kitayama, Tomonori Owa, Akiko Ryokawa, Rie Takeuchi, Satoe Goto, Keiko Yamauchi, Mie Ito, Tomoki Kaneko, Hitoshi Ueda, Shuichi Ikeda, Ban Mihara, Hirofumi Kubo, Akiko Takano, Gou Yasui, Masami Akuzawa, Kaori Yamaguchi, Toshinari Odawara, Naomi Oota, Megumi Shimamura, Mikiko Sugiyama, Atsushi Watanabe, Shigeo Takebayashi, Yoshigazu Hayakawa, Mitsuhiro Idegawa, Noriko Toya, Kazunari Ishii

    Alzheimer's Research &amp; Therapy   16 ( 1 )   2024.2

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    Background

    Polygenic effects have been proposed to account for some disease phenotypes; these effects are calculated as a polygenic risk score (PRS). This score is correlated with Alzheimer’s disease (AD)-related phenotypes, such as biomarker abnormalities and brain atrophy, and is associated with conversion from mild cognitive impairment (MCI) to AD. However, the AD PRS has been examined mainly in Europeans, and owing to differences in genetic structure and lifestyle, it is unclear whether the same relationships between the PRS and AD-related phenotypes exist in non-European populations. In this study, we calculated and evaluated the AD PRS in Japanese individuals using genome-wide association study (GWAS) statistics from Europeans.

    Methods

    In this study, we calculated the AD PRS in 504 Japanese participants (145 cognitively unimpaired (CU) participants, 220 participants with late mild cognitive impairment (MCI), and 139 patients with mild AD dementia) enrolled in the Japanese Alzheimer’s Disease Neuroimaging Initiative (J-ADNI) project. In order to evaluate the clinical value of this score, we (1) determined the polygenic effects on AD in the J-ADNI and validated it using two independent cohorts (a Japanese neuropathology (NP) cohort (n = 565) and the North American ADNI (NA-ADNI) cohort (n = 617)), (2) examined the AD-related phenotypes associated with the PRS, and (3) tested whether the PRS helps predict the conversion of MCI to AD.

    Results

    The PRS using 131 SNPs had an effect independent of APOE. The PRS differentiated between CU participants and AD patients with an area under the curve (AUC) of 0.755 when combined with the APOE variants. Similar AUC was obtained when PRS calculated by the NP and NA-ADNI cohorts was applied. In MCI patients, the PRS was associated with cerebrospinal fluid phosphorylated-tau levels (β estimate = 0.235, p value = 0.026). MCI with a high PRS showed a significantly increased conversion to AD in APOE ε4 noncarriers with a hazard rate of 2.22. In addition, we also developed a PRS model adjusted for LD and observed similar results.

    Conclusions

    We showed that the AD PRS is useful in the Japanese population, whose genetic structure is different from that of the European population. These findings suggest that the polygenicity of AD is partially common across ethnic differences.

    DOI: 10.1186/s13195-024-01414-x

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    Other Link: https://link.springer.com/article/10.1186/s13195-024-01414-x/fulltext.html

  • Missense mutation of NRAS is associated with malignant progression in neurocutaneous melanosis. International journal

    Haruhiko Takahashi, Manabu Natsumeda, Norikazu Hara, Akihide Koyama, Hiroshi Shimizu, Akinori Miyashita, Daiken Satake, Yoshihiro Mouri, Jun Tsukano, Keita Kawabe, Yoshihiro Tsukamoto, Masayasu Okada, Ryosuke Ogura, Akihiko Yuki, Hajime Umezu, Akiyoshi Kakita, Takeshi Ikeuchi, Makoto Oishi

    Acta neuropathologica communications   12 ( 1 )   14 - 14   2024.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    Neurocutaneous melanosis (NCM) is a rare congenital neurocutaneous syndrome characterized by congenital melanocytic nevus of skin and abnormal proliferation of leptomeningeal melanocytes. Early acquisition of post-zygotic somatic mutations has been postulated to underlie the pathogenesis of NCM. The pathogenesis of NCM remains to be fully elucidated, and treatment options have not been established. Here, we report for the first time, multiregional genomic analyses in a 3-year-old autopsied girl with leptomeningeal melanomatosis associated with NCM, in which a ventriculo-peritoneal (VP) shunt was inserted for the treatment of hydrocephalus. The patient expired six months after the onset due to respiratory failure caused by abdominal dissemination via VP shunt. We performed multiregional exome sequencing to identify genomic differences among brain and abdominal tumors, nevus, and normal tissues. A total of 87 somatic mutations were found in 71 genes, with a significantly large number of gene mutations found in the tumor site. The genetic alterations detected in the nevus were only few and not shared with other sites. Three mutations, namely GNAQ R183Q, S1PR3 G89S and NRAS G12V, considered pathogenic, were found, although S1PR3 mutations have not been previously reported in melanocytic tumors. GNAQ and S1PR3 mutations were shared in both tumor and normal sites. Moreover, the mutant allele frequencies of the two mutations were markedly higher in tumor sites than in normal sites, with copy-neutral loss-of-heterozygosity (CN-LOH) occurring in tumor. NRAS mutation was found only in the abdominal tumor and was thought to be responsible for malignant progression in the present case. Multiregional comprehensive genetic analysis may lead to discovering novel driver mutations associated with tumorigenesis and targeted therapy.

    DOI: 10.1186/s40478-024-01723-0

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  • Search for APOE rare missense variants in a Japanese population

    宮下哲典, 大日方藍, 他田真理, 阿部学, 柿田明美, 池内健

    Bio Clinica   39 ( 4 )   2024

  • Clinicopathologic features of two unrelated autopsied patients with Charcot-Marie-Tooth disease carrying MFN2 gene mutation. International journal

    Hideki Hayashi, Rie Saito, Hidetomo Tanaka, Norikazu Hara, Shin Koide, Yosuke Yonemochi, Tetsuo Ozawa, Mariko Hokari, Yasuko Toyoshima, Akinori Miyashita, Osamu Onodera, Kouichirou Okamoto, Takeshi Ikeuchi, Takashi Nakajima, Akiyoshi Kakita

    Acta neuropathologica communications   11 ( 1 )   207 - 207   2023.12

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  • 新規L344F変異を有するPick diseaseの多面的病態解析

    河上 緒, 野中 隆, 原 範和, 宮下 哲典, 亀谷 富由樹, 鴻江 真維, 佐藤 祐太, 田平 万莉奈, 長谷川 舞衣, 月江 珠緒, 櫻井 圭太, 池田 研二, 木村 朴, 永倉 暁人, 新里 和弘, 大島 健一, 池内 健, 長谷川 成人

    Dementia Japan   37 ( 4 )   662 - 662   2023.10

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    Language:Japanese   Publisher:(一社)日本認知症学会  

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  • ブレインバンクのリソースの質の担保と研究利用検体選択についての検討

    齊藤 祐子, 宮下 哲典, 森島 真帆, 荒川 晶, 原 愛徒, 池内 健, 高尾 昌樹, 村山 繁雄

    Dementia Japan   37 ( 4 )   712 - 712   2023.10

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    Language:Japanese   Publisher:(一社)日本認知症学会  

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  • アルツハイマー病理の進行に着目した剖検脳トランスクリプトーム解析

    原 範和, 宮下 哲典, 長谷川 舞衣, 月江 珠緒, 春日 健作, 齊藤 祐子, 村山 繁雄, 池内 健

    Dementia Japan   37 ( 4 )   681 - 681   2023.10

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    Language:Japanese   Publisher:(一社)日本認知症学会  

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  • 日本人ADにおけるLATE,PARTの感受性遺伝子解析

    宮下 哲典, 金田 大太, 原 範和, 光森 理紗, 大日方 藍, 月江 珠緒, 長谷川 舞衣, 五十嵐 一也, 春日 健作, 菊地 正隆, 齊藤 祐子, 村山 繁雄, 橋詰 良夫, 新飯田 俊平, 尾崎 浩一, 池内 健

    Dementia Japan   37 ( 4 )   709 - 709   2023.10

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    Language:Japanese   Publisher:(一社)日本認知症学会  

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  • 若年性認知症の初診時臨床的特徴と脳脊髄液バイオマーカーの比較

    大滝 悠莉, 春日 健作, 月江 珠緒, 宮下 哲典, 小野寺 理, 池内 健

    Dementia Japan   37 ( 4 )   684 - 684   2023.10

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    Language:Japanese   Publisher:(一社)日本認知症学会  

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  • 脳脊髄液アミロイドβ(Aβ)38の臨床的意義の検討

    月江 珠緒, 春日 健作, 菊地 正隆, 五十嵐 一也, 大滝 悠莉, 石黒 敬信, 宮下 哲典, 小野寺 理, 岩坪 威, 池内 健, J-ADNI

    Dementia Japan   37 ( 4 )   658 - 658   2023.10

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  • 日本人におけるLATE,PART病理確定例の認知症感受性遺伝子・バリアント解析

    金田 大太, 宮下 哲典, 原 範和, 大日方 藍, 月江 珠緒, 長谷川 舞衣, 五十嵐 一也, 春日 健作, 赤津 裕康, 池内 健, 橋詰 良夫

    Dementia Japan   37 ( 4 )   658 - 658   2023.10

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  • リアルワールドにおける血漿バイオマーカーの有用性の検討

    春日 健作, 月江 珠緒, 五十嵐 一也, 石黒 敬信, 宮下 哲典, 小野寺 理, 池内 健

    Dementia Japan   37 ( 4 )   658 - 658   2023.10

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  • ヒト肝癌由来HepG2細胞株におけるAPOEの機能解析

    大日方 藍, Liu Lixin, 原 範和, 長谷川 舞衣, 月江 珠緒, 五十嵐 一也, 幡野 敦, 角田 伸人, 菊地 正隆, 松本 雅記, 春日 健作, 宮下 哲典, 池内 健

    Dementia Japan   37 ( 4 )   678 - 678   2023.10

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  • 新規L344F変異を有するPick diseaseの多面的病態解析

    河上 緒, 野中 隆, 原 範和, 宮下 哲典, 亀谷 富由樹, 鴻江 真維, 佐藤 祐太, 田平 万莉奈, 長谷川 舞衣, 月江 珠緒, 櫻井 圭太, 池田 研二, 木村 朴, 永倉 暁人, 新里 和弘, 大島 健一, 池内 健, 長谷川 成人

    Dementia Japan   37 ( 4 )   662 - 662   2023.10

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  • アルツハイマー連続体における脳脊髄液αシヌクレインの臨床的有用性の検討

    五十嵐 一也, 春日 健作, 月江 珠緒, 菊地 正隆, 宮下 哲典, 小野寺 理, 岩坪 威, 池内 健, Japanese Alzheimer's Disease Neuroimaging Initiative

    Dementia Japan   37 ( 4 )   687 - 687   2023.10

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  • Amygdala granular fuzzy astrocytes are independently associated with both LATE neuropathologic change and argyrophilic grains: a study of Japanese series with a low to moderate Braak stage. Reviewed International journal

    Osamu Yokota, Tomoko Miki, Hanae Nakashima-Yasuda, Hideki Ishizu, Takashi Haraguchi, Chikako Ikeda, Akinori Miyashita, Takeshi Ikeuchi, Shintaro Takenoshita, Seishi Terada, Manabu Takaki

    Acta neuropathologica communications   11 ( 1 )   148 - 148   2023.9

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  • Multiancestry analysis of the HLA locus in Alzheimer's and Parkinson's diseases uncovers a shared adaptive immune response mediated by HLA-DRB1*04 subtypes. Reviewed International journal

    Yann Le Guen, Guo Luo, Aditya Ambati, Vincent Damotte, Iris Jansen, Eric Yu, Aude Nicolas, Itziar de Rojas, Thiago Peixoto Leal, Akinori Miyashita, Céline Bellenguez, Michelle Mulan Lian, Kayenat Parveen, Takashi Morizono, Hyeonseul Park, Benjamin Grenier-Boley, Tatsuhiko Naito, Fahri Küçükali, Seth D Talyansky, Selina Maria Yogeshwar, Vicente Sempere, Wataru Satake, Victoria Alvarez, Beatrice Arosio, Michael E Belloy, Luisa Benussi, Anne Boland, Barbara Borroni, María J Bullido, Paolo Caffarra, Jordi Clarimon, Antonio Daniele, Daniel Darling, Stéphanie Debette, Jean-François Deleuze, Martin Dichgans, Carole Dufouil, Emmanuel During, Emrah Düzel, Daniela Galimberti, Guillermo Garcia-Ribas, José María García-Alberca, Pablo García-González, Vilmantas Giedraitis, Oliver Goldhardt, Caroline Graff, Edna Grünblatt, Olivier Hanon, Lucrezia Hausner, Stefanie Heilmann-Heimbach, Henne Holstege, Jakub Hort, Yoo Jin Jung, Deckert Jürgen, Silke Kern, Teemu Kuulasmaa, Kun Ho Lee, Ling Lin, Carlo Masullo, Patrizia Mecocci, Shima Mehrabian, Alexandre de Mendonça, Mercè Boada, Pablo Mir, Susanne Moebus, Fermin Moreno, Benedetta Nacmias, Gael Nicolas, Shumpei Niida, Børge G Nordestgaard, Goran Papenberg, Janne Papma, Lucilla Parnetti, Florence Pasquier, Pau Pastor, Oliver Peters, Yolande A L Pijnenburg, Gerard Piñol-Ripoll, Julius Popp, Laura Molina Porcel, Raquel Puerta, Jordi Pérez-Tur, Innocenzo Rainero, Inez Ramakers, Luis M Real, Steffi Riedel-Heller, Eloy Rodriguez-Rodriguez, Owen A Ross, Jose Luís Royo, Dan Rujescu, Nikolaos Scarmeas, Philip Scheltens, Norbert Scherbaum, Anja Schneider, Davide Seripa, Ingmar Skoog, Vincenzo Solfrizzi, Gianfranco Spalletta, Alessio Squassina, John van Swieten, Raquel Sánchez-Valle, Eng-King Tan, Thomas Tegos, Charlotte Teunissen, Jesper Qvist Thomassen, Lucio Tremolizzo, Martin Vyhnalek, Frans Verhey, Margda Waern, Jens Wiltfang, Jing Zhang, Henrik Zetterberg, Kaj Blennow, Zihuai He, Julie Williams, Philippe Amouyel, Frank Jessen, Patrick G Kehoe, Ole A Andreassen, Cornelia Van Duin, Magda Tsolaki, Pascual Sánchez-Juan, Ruth Frikke-Schmidt, Kristel Sleegers, Tatsushi Toda, Anna Zettergren, Martin Ingelsson, Yukinori Okada, Giacomina Rossi, Mikko Hiltunen, Jungsoo Gim, Kouichi Ozaki, Rebecca Sims, Jia Nee Foo, Wiesje van der Flier, Takeshi Ikeuchi, Alfredo Ramirez, Ignacio Mata, Agustín Ruiz, Ziv Gan-Or, Jean-Charles Lambert, Michael D Greicius, Emmanuel Mignot

    Proceedings of the National Academy of Sciences of the United States of America   120 ( 36 )   e2302720120   2023.9

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    Across multiancestry groups, we analyzed Human Leukocyte Antigen (HLA) associations in over 176,000 individuals with Parkinson's disease (PD) and Alzheimer's disease (AD) versus controls. We demonstrate that the two diseases share the same protective association at the HLA locus. HLA-specific fine-mapping showed that hierarchical protective effects of HLA-DRB1*04 subtypes best accounted for the association, strongest with HLA-DRB1*04:04 and HLA-DRB1*04:07, and intermediary with HLA-DRB1*04:01 and HLA-DRB1*04:03. The same signal was associated with decreased neurofibrillary tangles in postmortem brains and was associated with reduced tau levels in cerebrospinal fluid and to a lower extent with increased Aβ42. Protective HLA-DRB1*04 subtypes strongly bound the aggregation-prone tau PHF6 sequence, however only when acetylated at a lysine (K311), a common posttranslational modification central to tau aggregation. An HLA-DRB1*04-mediated adaptive immune response decreases PD and AD risks, potentially by acting against tau, offering the possibility of therapeutic avenues.

    DOI: 10.1073/pnas.2302720120

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  • APOEのレアミスセンスバリアント

    宮下 哲典, 大日方 藍, 他田 真理, 阿部 学, 柿田 明美, 池内 健

    BIO Clinica   38 ( 7 )   602 - 603   2023.7

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    アルツハイマー病(Alzheimer Disease:AD)の強力な感受性遺伝子であるアポリポプロテインE遺伝子(Apolipoprotein E:APOE)のレアミスセンスバリアントを探索・解析するプロジェクトを進めている。本稿ではその概要と進捗について述べる。先行する海外の研究成果(クライストチャーチバリアント,APOEカスケード仮説,U19プロジェクト)に関しても合わせて言及する。(著者抄録)

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  • The clinical application of optimized AT(N) classification in Alzheimer’s clinical syndrome (ACS) and non-ACS conditions Reviewed

    Kensaku Kasuga, Tamao Tsukie, Masataka Kikuchi, Takayoshi Tokutake, Kazuo Washiyama, Soichiro Shimizu, Hiroshi Yoshizawa, Yasuko Kuroha, Ryuji Yajima, Hiroshi Mori, Yasuaki Arakawa, Kiyoshi Onda, Akinori Miyashita, Osamu Onodera, Takeshi Iwatsubo, Takeshi Ikeuchi

    Neurobiology of Aging   127   23 - 32   2023.7

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    DOI: 10.1016/j.neurobiolaging.2023.03.007

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  • Heterogenous Genetic, Clinical, and Imaging Features in Patients with Neuronal Intranuclear Inclusion Disease Carrying NOTCH2NLC Repeat Expansion Reviewed

    Yusran Ady Fitrah, Yo Higuchi, Norikazu Hara, Takayoshi Tokutake, Masato Kanazawa, Kazuhiro Sanpei, Tomone Taneda, Akihiko Nakajima, Shin Koide, Shintaro Tsuboguchi, Midori Watanabe, Junki Fukumoto, Shoichiro Ando, Tomoe Sato, Yohei Iwafuchi, Aki Sato, Hideki Hayashi, Takanobu Ishiguro, Hayato Takeda, Toshiaki Takahashi, Nobuyoshi Fukuhara, Kensaku Kasuga, Akinori Miyashita, Osamu Onodera, Takeshi Ikeuchi

    Brain Sciences   13 ( 6 )   955 - 955   2023.6

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    Neuronal intranuclear inclusion disease (NIID) is a neurodegenerative disorder that is caused by the abnormal expansion of non-coding trinucleotide GGC repeats in NOTCH2NLC. NIID is clinically characterized by a broad spectrum of clinical presentations. To date, the relationship between expanded repeat lengths and clinical phenotype in patients with NIID remains unclear. Thus, we aimed to clarify the genetic and clinical spectrum and their association in patients with NIID. For this purpose, we genetically analyzed Japanese patients with adult-onset NIID with characteristic clinical and neuroimaging findings. Trinucleotide repeat expansions of NOTCH2NLC were examined by repeat-primed and amplicon-length PCR. In addition, long-read sequencing was performed to determine repeat size and sequence. The expanded GGC repeats ranging from 94 to 361 in NOTCH2NLC were found in all 15 patients. Two patients carried biallelic repeat expansions. There were marked heterogenous clinical and imaging features in NIID patients. Patients presenting with cerebellar ataxia or urinary dysfunction had a significantly larger GGC repeat size than those without. This significant association disappeared when these parameters were compared with the total trinucleotide repeat number. ARWMC score was significantly higher in patients who had a non-glycine-type trinucleotide interruption within expanded poly-glycine motifs than in those with a pure poly-glycine expansion. These results suggested that the repeat length and sequence in NOTCH2NLC may partly modify some clinical and imaging features of NIID.

    DOI: 10.3390/brainsci13060955

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  • 【認知症のゲノム医療】APOEの遺伝型とレアミスセンスバリアント 臨床応用への可能性

    宮下 哲典, 原 範和, 春日 健作, 菊地 正隆, 尾崎 浩一, 新飯田 俊平, 他田 真理, 柿田 明美, 池内 健

    Dementia Japan   37 ( 2 )   239 - 249   2023.4

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  • 遺伝性痙性対麻痺を呈しGTP cyclohydrolase 1ヘテロ接合性変異を認めた1剖検例

    本郷 祥子, 他田 真理, 池田 哲彦, 小澤 哲夫, 劉 李きん, 宮下 哲典, 池内 健, 小野寺 理, 中島 孝, 柿田 明美

    信州医学雑誌   71 ( 2 )   128 - 129   2023.4

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  • 遺伝性痙性対麻痺を呈しGTP cyclohydrolase 1ヘテロ接合性変異を認めた1剖検例

    本郷 祥子, 他田 真理, 池田 哲彦, 小澤 哲夫, 劉 李きん, 宮下 哲典, 池内 健, 小野寺 理, 中島 孝, 柿田 明美

    信州医学雑誌   71 ( 2 )   128 - 129   2023.4

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  • Novel Partial Deletions, Frameshift and Missense Mutations of CSF1R in Patents with CSF1R-Related Leukoencephalopathy. Reviewed International journal

    Takanobu Ishiguro, Takuya Konno, Norikazu Hara, Bin Zhu, Satoshi Okada, Mamoru Shibata, Reiko Saika, Takaya Kitano, Megumi Toko, Tomohisa Nezu, Yuka Hama, Tomoya Kawazoe, Ikuko Takahashi-Iwata, Ichiro Yabe, Kota Sato, Hayato Takeda, Shintaro Toda, Jin Nishimiya, Toshiyuki Teduka, Hiroaki Nozaki, Kensaku Kasuga, Akinori Miyashita, Osamu Onodera, Takeshi Ikeuchi

    European journal of neurology   30 ( 7 )   1861 - 1870   2023.3

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    BACKGROUND: CSF1R-related leukoencephalopathy is an adult-onset leukoencephalopathy caused by mutations in CSF1R. The present study aimed to explore the broader genetic spectrum of CSF1R-related leukoencephalopathy in association with clinical and imaging features. METHODS: Mutational analysis of CSF1R was performed for 100 consecutive patients with adult-onset leukoencephalopathy. Sequence and copy number variation (CNV) analyses of CSF1R were performed. The genomic ranges of the deletions were determined by long-read sequencing. Ligand-dependent autophosphorylation of CSF1R was examined in cells expressing the CSF1R mutants identified in this study. RESULTS: We identified CSF1R mutations in 15 patients, accounting for 15% of the adult-onset leukoencephalopathy cases. Seven novel and five previously reported CSF1R mutations were identified. The novel mutations, including three missense and one in-frame 3-bp deletion, were located in the tyrosine kinase domain (TKD) of CSF1R. Functional assays revealed that none of the novel mutations in the TKD showed autophosphorylation of CSF1R. We identified two partial deletions of CSF1R that resulted in the lack of the C-terminal region, including the distal TKD, in two patients. Variable clinical features including cognitive impairment, psychiatric symptoms, and gait disturbance were observed. Various degrees of the white matter lesions and corpus callosum abnormalities on MRI and characteristic calcifications on CT were observed as imaging features. CONCLUSIONS: Our results highlighted the importance of examining the CNV of CSF1R even when Sanger or exome sequencing reveal no CSF1R mutations. Genetic examination of sequences and CNV analyses of CSF1R are recommended for an accurate diagnosis of CSF1R-related leukoencephalopathy.

    DOI: 10.1111/ene.15796

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  • <i>SYNE1</i>-ataxia: clinicopathologic features of an autopsied patient with novel compound heterozygous mutations Reviewed

    Rie Saito, Norikazu Hara, Mari Tada, Masatoshi Wakabayashi, Akinori Miyashita, Masatoyo Nishizawa, Osamu Onodera, Takeshi Ikeuchi, Akiyoshi Kakita

    Journal of Neuropathology &amp; Experimental Neurology   2022.12

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    DOI: 10.1093/jnen/nlac120

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  • 疾患解析技術の最先端 認知症のトランスクリプトーム解析 ヒト剖検脳のシングル核解析から見えてくるもの

    宮下 哲典, 他田 真理, 原 範和, 長谷川 舞衣, 柿田 明美, 池内 健

    老年精神医学雑誌   33 ( 増刊II )   195 - 195   2022.11

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  • 網羅的遺伝子発現解析によるアルツハイマー病早期変動遺伝子の同定

    菊地 正隆, 廣田 湧, 原 範和, 榊原 泰史, 関谷 倫子, 宮下 哲典, 池内 健, 飯島 浩一

    老年精神医学雑誌   33 ( 増刊II )   225 - 225   2022.11

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  • Intracellular FUS protein accumulation leads to cytoskeletal, organelle and cellular homeostasis perturbations

    Chyi Wei Chung, Alexandra J. Zhou, Ioanna Mela, Amberley D. Stephens, Akinori Miyashita, Peter H. St George-Hyslop, Clemens F. Kaminski, Tuomas P. J. Knowles, Gabriele S. Kaminski Schierle

    2022.10

  • 網羅的遺伝子発現解析によるアルツハイマー病早期変動遺伝子の同定

    菊地 正隆, 廣田 湧, 原 範和, 榊原 泰史, 関谷 倫子, 宮下 哲典, 池内 健, 飯島 浩一

    Dementia Japan   36 ( 4 )   743 - 743   2022.10

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  • Biallelic <i>COX10</i> Mutations and <i>PMP22</i> Deletion in a Family With Leigh Syndrome and Hereditary Neuropathy With Liability to Pressure Palsy Reviewed

    Yasuko Kuroha, Takanobu Ishiguro, Mari Tada, Norikazu Hara, Kei Murayama, Izumi Kawachi, Kensaku Kasuga, Akinori Miyashita, Arika Hasegawa, Tetsuya Takahashi, Nae Matsubara, Osamu Onodera, Akiyoshi Kakita, Ryoko Koike, Takeshi Ikeuchi

    Neurology Genetics   8 ( 5 )   e200030 - e200030   2022.10

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    Publishing type:Research paper (scientific journal)   Publisher:Ovid Technologies (Wolters Kluwer Health)  

    Objectives

    Leigh syndrome is a progressive encephalopathy characterized by symmetrical lesions in brain. This study aimed to investigate the clinicopathologic and genetic characteristics of a family with Leigh syndrome and hereditary neuropathy with liability to pressure palsy (HNPP).

    Methods

    Data from a Japanese family's clinical features, MRIs, muscle biopsy, and an autopsy were analyzed. A whole-exome sequence was performed, as well as real-time PCR analysis to determine copy number variations and Western blot analyses.

    Results

    The proband and her 2 siblings developed spastic paraplegia and mental retardation during childhood. The proband and her sister had peripheral neuropathy, whereas their father developed compression neuropathy. Leigh encephalopathy was diagnosed neuropathologically. Brain MRI revealed changes in cerebral white matter as well as multiple lesions in the brainstem and cerebellum. Muscle biopsy revealed type 2 fiber uniformity and decreased staining of cytochrome c oxidase. The COX10 missense mutation was identified through whole-exome sequence. A 1.4-Mb genomic deletion extending from intron 5 of COX10 to PMP22 was detected.

    Discussion

    These findings suggest that in this family, Leigh syndrome is associated with a mitochondrial respiratory chain complex IV deficiency caused by biallelic COX10 mutations coexisting with HNPP caused by heterozygous PMP22 deletion.

    DOI: 10.1212/nxg.0000000000200030

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  • 疾患解析技術の最先端 認知症のトランスクリプトーム解析 ヒト剖検脳のシングル核解析から見えてくるもの

    宮下 哲典, 他田 真理, 原 範和, 長谷川 舞衣, 柿田 明美, 池内 健

    Dementia Japan   36 ( 4 )   721 - 721   2022.10

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  • Identification of mild cognitive impairment subtypes predicting conversion to Alzheimer’s disease using multimodal data

    Masataka Kikuchi, Kaori Kobayashi, Sakiko Itoh, Kensaku Kasuga, Akinori Miyashita, Takeshi Ikeuchi, Eiji Yumoto, Yuki Kosaka, Yasuto Fushimi, Toshihiro Takeda, Shirou Manabe, Satoshi Hattori, Alzheimer's Disease Neuroimaging Initiative, Akihiro Nakaya, Kenichi Kamijo, Yasushi Matsumura

    Computational and Structural Biotechnology Journal   20   5296 - 5308   2022.8

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    DOI: 10.1016/j.csbj.2022.08.007

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  • Amygdala granular fuzzy astrocytes as lesions preceding development of argyrophilic grains: data from 239 autopsy cases Reviewed International journal

    Osamu Yokota, Tomoko Miki, Chikako Ikeda, Hideki Ishizu, Takashi Haraguchi, Akinori Miyashita, Takeshi Ikeuchi, Shintaro Takenoshita, Seishi Terada

    Free Neuropathology   3 ( 18 )   1 - 5   2022.7

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    File: 4285-Article Text-10362-2-10-20220727.pdf

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    Other Link: https://www.uni-muenster.de/Ejournals/index.php/fnp/article/view/4285/4433

  • Four-repeat tauopathies and late-onset psychiatric disorders: Etiological relevance or incidental findings? International journal

    Osamu Yokota, Tomoko Miki, Hideki Ishizu, Takashi Haraguchi, Yuki Kishimoto, Shintaro Takenoshita, Norikazu Hara, Akinori Miyashita, Takeshi Ikeuchi, Seishi Terada, Norihito Yamada

    Neuropathology : official journal of the Japanese Society of Neuropathology   2022.6

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    Argyrophilic grain disease (AGD), progressive supranuclear palsy (PSP) and corticobasal degeneration are four-repeat (4R) tauopathies that develop in the presenium or later. Whether these diseases are associated with the occurrence of late-onset psychiatric disorders remains unclear. To facilitate the accumulation of clinicopathological findings regarding this issue, we here present a selected series of 11 cases that clinically developed psychotic disorder (n = 7; age at onset: 41-75 years), depressive disorder (n = 1; 49 years), bipolar disorder (n = 2; 32 and 37 years) and somatoform disorder (n = 1; 88 years), and had at least one pathological hallmark of these tauopathies. The mean age at death was 74.3 years. No case showed dementia, at least in the early stage of the course. Nine cases had AGD. Granular fuzzy astrocytes in the amygdala were noted in all AGD cases and one non-AGD case. Two AGD cases had tufted astrocytes (TAs) in the amygdala but not in the frontal cortex and striatum. Three AGD and two non-AGD cases had TAs in the frontal cortex and/or striatum but not in the amygdala. One AGD case had a small number of astrocytic plaques in the frontal cortex, striatum and globus pallidus. Only one case was diagnosed as atypical PSP according to the NINDS-PSP neuropathological criteria. No case had high-level Alzheimer's disease pathology, Lewy body disease or limbic-predominant age-related TDP-43 encephalopathy. Two cases had mild neuronal loss in the hippocampus and substantia nigra, respectively. Clinicopathological studies focusing especially on early changes of 4R tauopathies, as well as the development of surrogate markers of these diseases, may be necessary for better understanding of the pathogenic backgrounds of late-onset psychiatric disorders.

    DOI: 10.1111/neup.12820

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  • Genetics of Alzheimer's disease: an East Asian perspective. Reviewed International journal

    Akinori Miyashita, Masataka Kikuchi, Norikazu Hara, Takeshi Ikeuchi

    Journal of human genetics   2022.6

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    Alzheimer's disease (AD) is an age-related multifactorial neurodegenerative disorder. Advances in genome technology, including next generation sequencing have uncovered complex genetic effects in AD by analyzing both common and rare functional variants. Multiple lines of evidence suggest that the pathogenesis of AD is influenced by multiple genetic components rather than single genetic factor. Previous genetic studies on AD have predominantly included European ancestry cohorts; hence, the non-European population may be underrepresented, potentially leading to reduced diversity in AD genetic research. Additionally, ethnic diversity may result in dissimilar effects of genetic determinants in AD. APOE genotypes are a well-established genetic risk factor in AD, with the East Asian population having a higher risk of AD associated with the APOE ε4 allele. To date, seven genome-wide association studies (GWAS) have been conducted in East Asians, which report a total of 26 AD-associated loci. Several rare variants, including the p.H157Y variant in TREM2, and the p.G186R and p.R274W variants in SHARPIN are associated with risk of AD in East Asians. Extending genetic studies to diverse populations, including East Asians is necessary, which could yield more comprehensive insights into AD, and here we review the recent findings regarding the genetic determinants of AD from an East Asian perspective.

    DOI: 10.1038/s10038-022-01050-z

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  • Actin-binding protein filamin-A drives tau aggregation and contributes to progressive supranuclear palsy pathology. Reviewed International journal

    Koyo Tsujikawa, Kohei Hamanaka, Yuichi Riku, Yuki Hattori, Norikazu Hara, Yohei Iguchi, Shinsuke Ishigaki, Atsushi Hashizume, Satoko Miyatake, Satomi Mitsuhashi, Yu Miyazaki, Mayumi Kataoka, Li Jiayi, Keizo Yasui, Satoshi Kuru, Haruki Koike, Kenta Kobayashi, Naruhiko Sahara, Norio Ozaki, Mari Yoshida, Akiyoshi Kakita, Yuko Saito, Yasushi Iwasaki, Akinori Miyashita, Takeshi Iwatsubo, Takeshi Ikeuchi, Takaki Miyata, Gen Sobue, Naomichi Matsumoto, Kentaro Sahashi, Masahisa Katsuno

    Science advances   8 ( 21 )   eabm5029   2022.5

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    While amyloid-β lies upstream of tau pathology in Alzheimer's disease, key drivers for other tauopathies, including progressive supranuclear palsy (PSP), are largely unknown. Various tau mutations are known to facilitate tau aggregation, but how the nonmutated tau, which most cases with PSP share, increases its propensity to aggregate in neurons and glial cells has remained elusive. Here, we identified genetic variations and protein abundance of filamin-A in the PSP brains without tau mutations. We provided in vivo biochemical evidence that increased filamin-A levels enhance the phosphorylation and insolubility of tau through interacting actin filaments. In addition, reduction of filamin-A corrected aberrant tau levels in the culture cells from PSP cases. Moreover, transgenic mice carrying human filamin-A recapitulated tau pathology in the neurons. Our data highlight that filamin-A promotes tau aggregation, providing a potential mechanism by which filamin-A contributes to PSP pathology.

    DOI: 10.1126/sciadv.abm5029

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  • A functional variant of SHARPIN confers increased risk of late-onset Alzheimer's disease. Reviewed International journal

    Yuya Asanomi, Daichi Shigemizu, Shintaro Akiyama, Akinori Miyashita, Risa Mitsumori, Norikazu Hara, Takeshi Ikeuchi, Shumpei Niida, Kouichi Ozaki

    Journal of human genetics   67 ( 4 )   203 - 208   2022.4

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    Late-onset Alzheimer's disease (LOAD) is the most common form of dementia, and its pathogenesis is multifactorial. We previously reported a rare functional variant of SHARPIN (rs572750141, NP_112236.3:p.Gly186Arg) that was significantly associated with LOAD. In addition, several recent studies have suggested the potential role of SHARPIN in AD pathogenesis. In this study, we sought to identify additional functional variants of SHARPIN in Japanese population. Six highly deleterious variants of SHARPIN, comprising four missense variants, one frameshift variant, and one stop-gain variant were detected from whole-genome sequencing data for 180 patients with LOAD and 184 with mild cognitive impairment. One of these candidate variants (rs77359862, NP_112236.3:p.Arg274Trp) was significantly associated with an increased risk of LOAD in 5043 LOAD cases and 11984 controls (P = 0.0016, odds ratio = 1.43). Furthermore, this variant SHARPIN showed aberrant cellular localization and reduced the activation of NF-κB, a central mediator of inflammatory and immune responses. Further investigation of the physiologic role of SHARPIN may reveal the mechanism of onset of LOAD.

    DOI: 10.1038/s10038-021-00987-x

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  • Brain TDP-43 pathology in corticobasal degeneration: Topographical correlation with neuronal loss. Reviewed International journal

    Makoto Sainouchi, Mari Tada, Yusran Ady Fitrah, Norikazu Hara, Kou Tanaka, Jiro Idezuka, Izumi Aida, Takashi Nakajima, Akinori Miyashita, Kohei Akazawa, Takeshi Ikeuchi, Osamu Onodera, Akiyoshi Kakita

    Neuropathology and applied neurobiology   48 ( 3 )   e12786   2022.4

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    AIMS: Neuronal and glial inclusions comprising transactive response DNA-binding protein of 43 kDa (TDP-43) have been identified in the brains of patients with corticobasal degeneration (CBD), and a possible correlation between the presence of these inclusions and clinical phenotypes has been speculated. However, the significance of TDP-43 pathology in the pathomechanism of CBD has remained unclear. Here, we investigated the topographical relationship between TDP-43 inclusions and neuronal loss in CBD. METHODS: We estimated semi-quantitatively neuronal loss and TDP-43 pathology in the form of neuronal cytoplasmic inclusions (NCIs), astrocytic inclusions (AIs), oligodendroglial cytoplasmic inclusions (GCIs), and dystrophic neurites in 22 CNS regions in 10 patients with CBD. Then, the degree of correlation between the severity of neuronal loss and the quantity of each type of TDP-43 inclusion was assessed. We also investigated tau pathology in a similar manner. RESULTS: TDP-43 pathology was evident in nine patients. The putamen and globus pallidus were the regions most frequently affected (80%). NCIs were the most prominent form, and their quantity was significantly correlated with the severity of neuronal loss in more than half of the regions examined. The quantities of TDP-43 NCIs and tau NCIs were correlated in only a few regions. The number of regions where the quantities of TDP-43 AIs and GCIs were correlated with the severity of neuronal loss was apparently small in comparison with that of NCIs. CONCLUSIONS: TDP-43 alterations in neurons, not closely associated with tau pathology, may be involved in the pathomechanism underlying neuronal loss in CBD. There was a significant topographical correlation between neuronal cytoplasmic aggregation of TDP-43 and neuronal loss in CBD, suggesting that TDP-43 protein aberration might be associated with neuronal degeneration in CBD. There was no close correlation between the burden of TDP-43 and that of tau in neurons.

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  • Different AT(N) profiles and clinical progression classified by two different N markers using total tau and neurofilament light chain in cerebrospinal fluid. International journal

    Kensaku Kasuga, Masataka Kikuchi, Tamao Tsukie, Kazushi Suzuki, Ryoko Ihara, Atsushi Iwata, Norikazu Hara, Akinori Miyashita, Ryozo Kuwano, Takeshi Iwatsubo, Takeshi Ikeuchi

    BMJ neurology open   4 ( 2 )   e000321   2022

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    Background: The AT(N) classification was proposed for categorising individuals according to biomarkers. However, AT(N) profiles may vary depending on the markers chosen and the target population. Methods: We stratified 177 individuals who participated in the Japanese Alzheimer's Disease Neuroimaging Initiative by AT(N) classification according to cerebrospinal fluid (CSF) biomarkers. We compared the frequency of AT(N) profiles between the classification using total tau and neurofilament light chain (NfL) as N markers (AT(N)tau and AT(N)NfL). Baseline characteristics, and longitudinal biological and clinical changes were examined between AT(N) profiles. Results: We found that 9% of cognitively unimpaired subjects, 49% of subjects with mild cognitive impairment, and 61% of patients with Alzheimer's disease (AD) dementia had the biological AD profile (ie, A+T+) in the cohort. The frequency of AT(N) profiles substantially differed between the AT(N)tau and AT(N)NfL classifications. When we used t-tau as the N marker (AT(N)tau), those who had T- were more frequently assigned to (N)-, whereas those who had T+were more frequently assigned to (N)+ than when we used NfL as the N marker (AT(N)NfL). During a follow-up, the AD continuum group progressed clinically and biologically compared with the normal biomarker group in both the AT(N)tau and AT(N)NfL classifications. More frequent conversion to dementia was observed in the non-AD pathological change group in the AT(N)tau classification, but not in the AT(N)NfL classification. Conclusions: AT(N)tau and AT(N)NfL in CSF may capture different aspects of neurodegeneration and provide a different prognostic value. The AT(N) classification aids in understanding the AD continuum biology in various populations.

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  • ヒト剖検脳による神経疾患横断的なレアバリアント解析 APOE

    宮下 哲典, 他田 真理, 原 範和, 長谷川 舞衣, 月江 珠緒, Lixin Liu, Bin Zhu, Yusran Ady Fitrah, 春日 健作, 菊地 正隆, 柿田 明美, 池内 健

    Dementia Japan   35 ( 4 )   650 - 650   2021.10

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  • 認知症のゲノム医療 APOEの遺伝型とミスセンスレアバリアント:臨床応用への可能性

    宮下 哲典, 原 範和, 春日 健作, 菊地 正隆, 尾崎 浩一, 新飯田 俊平, 他田 真理, 柿田 明美, 池内 健

    Dementia Japan   35 ( 4 )   585 - 585   2021.10

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  • 神経核内封入体病(NIID)におけるNOTCH2NLCリピート伸長と臨床的特徴の検討

    樋口 陽, 原 範和, Yusran Ady Fitrah, 種田 朝音, 徳武 孝允, 三浦 健, 岩淵 洋平, 五十嵐 修一, 林 秀樹, 石黒 敬信, 三瓶 一弘, 武田 勇人, 高橋 俊昭, 金澤 雅人, 宮下 哲典, 小野寺 理, 池内 健

    Dementia Japan   35 ( 4 )   612 - 612   2021.10

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  • Ethnic and trans-ethnic genome-wide association studies identify new loci influencing Japanese Alzheimer's disease risk. Reviewed International journal

    Daichi Shigemizu, Risa Mitsumori, Shintaro Akiyama, Akinori Miyashita, Takashi Morizono, Sayuri Higaki, Yuya Asanomi, Norikazu Hara, Gen Tamiya, Kengo Kinoshita, Takeshi Ikeuchi, Shumpei Niida, Kouichi Ozaki

    Translational psychiatry   11 ( 1 )   151 - 151   2021.3

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    Alzheimer's disease (AD) has no cure, but early detection and risk prediction could allow earlier intervention. Genetic risk factors may differ between ethnic populations. To discover novel susceptibility loci of AD in the Japanese population, we conducted a genome-wide association study (GWAS) with 3962 AD cases and 4074 controls. Out of 4,852,957 genetic markers that passed stringent quality control filters, 134 in nine loci, including APOE and SORL1, were convincingly associated with AD. Lead SNPs located in seven novel loci were genotyped in an independent Japanese AD case-control cohort. The novel locus FAM47E reached genome-wide significance in a meta-analysis of association results. This is the first report associating the FAM47E locus with AD in the Japanese population. A trans-ethnic meta-analysis combining the results of the Japanese data sets with summary statistics from stage 1 data of the International Genomics of Alzheimer's Project identified an additional novel susceptibility locus in OR2B2. Our data highlight the importance of performing GWAS in non-European populations.

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  • Genetic Variations and Neuropathologic Features of Patients With PRKN Mutations. Reviewed International journal

    Naohiko Seike, Akio Yokoseki, Ryoko Takeuchi, Kento Saito, Hiroaki Miyahara, Akinori Miyashita, Tetsuhiko Ikeda, Izumi Aida, Takashi Nakajima, Masato Kanazawa, Masatoshi Wakabayashi, Yasuko Toyoshima, Hitoshi Takahashi, Riki Matsumoto, Tatsushi Toda, Osamu Onodera, Atsushi Ishikawa, Takeshi Ikeuchi, Akiyoshi Kakita

    Movement disorders : official journal of the Movement Disorder Society   36 ( 7 )   1634 - 1643   2021.2

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    BACKGROUND: Mutations in PRKN are the most common cause of autosomal recessive juvenile parkinsonism. The objective of this study was to investigate the association between genotype and pathology in patients with PRKN mutations. METHODS: We performed a sequence and copy number variation analysis of PRKN, mRNA transcripts, Parkin protein expression, and neuropathology in 8 autopsied patients. RESULTS: All the patients harbored biallelic PRKN mutations. Two patients were homozygous and heterozygous, respectively, for the missense mutation p.C431F. Seven patients had exon rearrangements, including 2 patients from a single family who harbored a homozygous deletion of exon 4, and 3 patients who carried a homozygous duplication of exons 6-7, a homozygous duplication of exons 10-11, and a heterozygous duplication of exons 2-4. In the other 2 patients, we found a compound heterozygous duplication of exon 2, deletion of exon 3, and a heterozygous duplication of exon 2. However, sequencing of cDNA prepared from mRNA revealed 2 different transcripts derived from triplication of exon 2 and deletion of exons 2-3 and from duplication of exons 2-4 and deletion of exons 3-4. Western blotting and immunohistochemistry revealed faint or no expression of Parkin in their brains. In the substantia nigra pars compacta, a subfield-specific pattern of neuronal loss and mild gliosis were evident. Lewy bodies were found in 3 patients. Peripheral sensory neuronopathy was a feature. CONCLUSIONS: Genomic and mRNA analysis is needed to identify the PRKN mutations. Variable mutations may result in no or little production of mature Parkin and the histopathologic features may be similar.

    DOI: 10.1002/mds.28521

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  • Frequent Germline and Somatic Single Nucleotide Variants in the Promoter Region of the Ribosomal RNA Gene in Japanese Lung Adenocarcinoma Patients. Reviewed International journal

    Riuko Ohashi, Hajime Umezu, Ayako Sato, Tatsuya Abé, Shuhei Kondo, Kenji Daigo, Seijiro Sato, Norikazu Hara, Akinori Miyashita, Takeshi Ikeuchi, Teiichi Motoyama, Masashi Kishi, Tadahiro Nagaoka, Keiko Horiuchi, Atsushi Shiga, Shujiro Okuda, Tomoki Sekiya, Aya Ohtsubo, Kosuke Ichikawa, Hiroshi Kagamu, Toshiaki Kikuchi, Satoshi Watanabe, Jun-Ichi Tanuma, Peter Schraml, Takao Hamakubo, Masanori Tsuchida, Yoichi Ajioka

    Cells   9 ( 11 )   2020.11

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    Ribosomal RNA (rRNA), the most abundant non-coding RNA species, is a major component of the ribosome. Impaired ribosome biogenesis causes the dysfunction of protein synthesis and diseases called "ribosomopathies," including genetic disorders with cancer risk. However, the potential role of rRNA gene (rDNA) alterations in cancer is unknown. We investigated germline and somatic single-nucleotide variants (SNVs) in the rDNA promoter region (positions -248 to +100, relative to the transcription start site) in 82 lung adenocarcinomas (LUAC). Twenty-nine tumors (35.4%) carried germline SNVs, and eight tumors (9.8%) harbored somatic SNVs. Interestingly, the presence of germline SNVs between positions +1 and +100 (n = 12; 14.6%) was associated with significantly shorter recurrence-free survival (RFS) and overall survival (OS) by univariate analysis (p < 0.05, respectively), and was an independent prognostic factor for RFS and OS by multivariate analysis. LUAC cell line PC9, carrying rDNA promoter SNV at position +49, showed significantly higher ribosome biogenesis than H1650 cells without SNV. Upon nucleolar stress induced by actinomycin D, PC9 retained significantly higher ribosome biogenesis than H1650. These results highlight the possible functional role of SNVs at specific sites of the rDNA promoter region in ribosome biogenesis, the progression of LUAC, and their potential prognostic value.

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  • バイオマーカーとリスク遺伝子で再考するアルツハイマー型認知症の臨床診断

    春日 健作, 月江 珠緒, 菊地 正隆, 原 範和, 宮下 哲典, 桑野 良三, 岩坪 威, 池内 健

    臨床神経学   60 ( Suppl. )   S338 - S338   2020.11

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  • 神経疾患・精神疾患の鑑別における血漿炎症性サイトカインの有用性

    樋口 陽, 春日 健作, 徳武 孝允, 宮下 哲典, 茂木 崇治, 福井 直樹, 横山 裕一, 染矢 俊幸, 小野寺 理, 池内 健

    臨床神経学   60 ( Suppl. )   S377 - S377   2020.11

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  • バイオマーカーとリスク遺伝子で再考するアルツハイマー型認知症の臨床診断

    春日 健作, 月江 珠緒, 菊地 正隆, 原 範和, 宮下 哲典, 桑野 良三, 岩坪 威, 池内 健

    臨床神経学   60 ( Suppl. )   S338 - S338   2020.11

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  • 神経疾患・精神疾患の鑑別における血漿炎症性サイトカインの有用性

    樋口 陽, 春日 健作, 徳武 孝允, 宮下 哲典, 茂木 崇治, 福井 直樹, 横山 裕一, 染矢 俊幸, 小野寺 理, 池内 健

    臨床神経学   60 ( Suppl. )   S377 - S377   2020.11

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  • CSF1RバリアントのキナーゼアッセイによるCSF1R関連脳症の発症機序解析

    朱 斌, Liu Lixin, 樋口 陽, Yusran Adyfitrah, 三浦 健, 目崎 直美, 原 範和, 月江 珠緒, 今野 卓哉, 春日 健作, 宮下 哲典, 池内 健

    Dementia Japan   34 ( 4 )   526 - 526   2020.10

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  • 認知症と精神疾患の鑑別における血液バイオマーカーの有用性の検討

    樋口 陽, 春日 健作, 徳武 孝允, 宮下 哲典, 茂木 崇治, 横山 裕一, 福井 直樹, 染矢 俊幸, 小野寺 理, 池内 健

    Dementia Japan   34 ( 4 )   527 - 527   2020.10

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  • データドリブンな軽度認知障害のサブタイピングおよびアルツハイマー病発症予測

    菊地 正隆, 小林 香織, 春日 健作, 宮下 哲典, 池内 健, 湯本 英二, 伏見 泰人, 武田 理宏, 真鍋 史朗, 上條 憲一, 松村 泰志

    Dementia Japan   34 ( 4 )   501 - 501   2020.10

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  • ヒト死後脳、ヒト培養細胞におけるAPOEの遺伝子発現解析

    Lixin Liu, 宮下 哲典, 村上 涼太, 原 範和, 菊地 正隆, Bin Zhu, 樋口 陽, Yusran Adyfitrah, 月江 珠緒, 長谷川 舞衣, 春日 健作, 赤津 裕康, 橋詰 良夫, 柿田 明美, 村山 繁雄, 池内 健

    Dementia Japan   34 ( 4 )   521 - 521   2020.10

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  • 日本人コホートJGSCAD、J-ADNI、NCGG、ToMMoにおけるバリアント解析 APOE

    宮下 哲典, 原 範和, 春日 健作, Lixin Liu, 樋口 陽, Bin Zhu, 月江 珠緒, 長谷川 舞衣, Yusran Adyfitrah, 石黒 敬信, 村上 涼太, 菊地 正隆, 中谷 明弘, 尾崎 浩一, 新飯田 俊平, 赤澤 宏平, 桑野 良三, 岩坪 威, 池内 健

    Dementia Japan   34 ( 4 )   521 - 521   2020.10

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  • ヒト死後脳に由来するDNA、RNAの品質管理

    長谷川 舞衣, 宮下 哲典, 春日 健作, 原 範和, 月江 珠緒, 齋藤 祐子, 赤津 裕康, 橋詰 良夫, 柿田 明美, 吉田 眞理, 村山 繁雄, 池内 健

    Dementia Japan   34 ( 4 )   525 - 525   2020.10

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  • ABCA7、SORL1、TREM2におけるアルツハイマー病関連レアバリアントの探索

    原 範和, 宮下 哲典, 尾崎 浩一, 新飯田 俊平, Liu Lixin, 樋口 陽, 朱 斌, 月江 珠緒, 春日 健作, 桑野 良三, 岩坪 威, 池内 健

    Dementia Japan   34 ( 4 )   526 - 526   2020.10

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  • ヒト死後脳に由来するDNA、RNAの品質管理

    長谷川 舞衣, 宮下 哲典, 春日 健作, 原 範和, 月江 珠緒, 齋藤 祐子, 赤津 裕康, 橋詰 良夫, 柿田 明美, 吉田 眞理, 村山 繁雄, 池内 健

    Dementia Japan   34 ( 4 )   525 - 525   2020.10

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  • 認知症と精神疾患の鑑別における血液バイオマーカーの有用性の検討

    樋口 陽, 春日 健作, 徳武 孝允, 宮下 哲典, 茂木 崇治, 横山 裕一, 福井 直樹, 染矢 俊幸, 小野寺 理, 池内 健

    Dementia Japan   34 ( 4 )   527 - 527   2020.10

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  • Novel CHP1 mutation in autosomal-recessive cerebellar ataxia: autopsy features of two siblings. Reviewed International journal

    Rie Saito, Norikazu Hara, Mari Tada, Yoshiaki Honma, Akinori Miyashita, Osamu Onodera, Takeshi Ikeuchi, Akiyoshi Kakita

    Acta neuropathologica communications   8 ( 1 )   134 - 134   2020.8

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  • Oculopharyngodistal myopathy with coexisting histology of systemic neuronal intranuclear inclusion disease: Clinicopathologic features of an autopsied patient harboring CGG repeat expansions in LRP12. Reviewed International journal

    Rie Saito, Hiroshi Shimizu, Takeshi Miura, Norikazu Hara, Naomi Mezaki, Yo Higuchi, Akinori Miyashita, Izumi Kawachi, Kazuhiro Sanpei, Yoshiaki Honma, Osamu Onodera, Takeshi Ikeuchi, Akiyoshi Kakita

    Acta neuropathologica communications   8 ( 1 )   75 - 75   2020.6

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  • Author Correction: Human and mouse single-nucleus transcriptomics reveal TREM2-dependent and TREM2-independent cellular responses in Alzheimer's disease. International journal

    Yingyue Zhou, Wilbur M Song, Prabhakar S Andhey, Amanda Swain, Tyler Levy, Kelly R Miller, Pietro L Poliani, Manuela Cominelli, Shikha Grover, Susan Gilfillan, Marina Cella, Tyler K Ulland, Konstantin Zaitsev, Akinori Miyashita, Takeshi Ikeuchi, Makoto Sainouchi, Akiyoshi Kakita, David A Bennett, Julie A Schneider, Michael R Nichols, Sean A Beausoleil, Jason D Ulrich, David M Holtzman, Maxim N Artyomov, Marco Colonna

    Nature medicine   26 ( 6 )   981 - 981   2020.6

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    An amendment to this paper has been published and can be accessed via a link at the top of the paper.

    DOI: 10.1038/s41591-020-0922-4

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  • Sensitivity to gene dosage and gene expression affects genes with copy number variants observed among neuropsychiatric diseases. Reviewed International journal

    Maria Yamasaki, Takashi Makino, Seik-Soon Khor, Hiromi Toyoda, Taku Miyagawa, Xiaoxi Liu, Hitoshi Kuwabara, Yukiko Kano, Takafumi Shimada, Toshiro Sugiyama, Hisami Nishida, Nagisa Sugaya, Mamoru Tochigi, Takeshi Otowa, Yuji Okazaki, Hisanobu Kaiya, Yoshiya Kawamura, Akinori Miyashita, Ryozo Kuwano, Kiyoto Kasai, Hisashi Tanii, Tsukasa Sasaki, Makoto Honda, Katsushi Tokunaga

    BMC medical genomics   13 ( 1 )   55 - 55   2020.3

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    BACKGROUND: Copy number variants (CNVs) have been reported to be associated with diseases, traits, and evolution. However, it is hard to determine which gene should have priority as a target for further functional experiments if a CNV is rare or a singleton. In this study, we attempted to overcome this issue by using two approaches: by assessing the influences of gene dosage sensitivity and gene expression sensitivity. Dosage sensitive genes derived from two-round whole-genome duplication in previous studies. In addition, we proposed a cross-sectional omics approach that utilizes open data from GTEx to assess the effect of whole-genome CNVs on gene expression. METHODS: Affymetrix Genome-Wide SNP Array 6.0 was used to detect CNVs by PennCNV and CNV Workshop. After quality controls for population stratification, family relationship and CNV detection, 287 patients with narcolepsy, 133 patients with essential hypersomnia, 380 patients with panic disorders, 164 patients with autism, 784 patients with Alzheimer disease and 1280 healthy individuals remained for the enrichment analysis. RESULTS: Overall, significant enrichment of dosage sensitive genes was found across patients with narcolepsy, panic disorders and autism. Particularly, significant enrichment of dosage-sensitive genes in duplications was observed across all diseases except for Alzheimer disease. For deletions, less or no enrichment of dosage-sensitive genes with deletions was seen in the patients when compared to the healthy individuals. Interestingly, significant enrichments of genes with expression sensitivity in brain were observed in patients with panic disorder and autism. While duplications presented a higher burden, deletions did not cause significant differences when compared to the healthy individuals. When we assess the effect of sensitivity to genome dosage and gene expression at the same time, the highest ratio of enrichment was observed in the group including dosage-sensitive genes and genes with expression sensitivity only in brain. In addition, shared CNV regions among the five neuropsychiatric diseases were also investigated. CONCLUSIONS: This study contributed the evidence that dosage-sensitive genes are associated with CNVs among neuropsychiatric diseases. In addition, we utilized open data from GTEx to assess the effect of whole-genome CNVs on gene expression. We also investigated shared CNV region among neuropsychiatric diseases.

    DOI: 10.1186/s12920-020-0699-9

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  • Disruption of a RAC1-centred network is associated with Alzheimer's disease pathology and causes age-dependent neurodegeneration. Reviewed International journal

    Masataka Kikuchi, Michiko Sekiya, Norikazu Hara, Akinori Miyashita, Ryozo Kuwano, Takeshi Ikeuchi, Koichi M Iijima, Akihiro Nakaya

    Human molecular genetics   29 ( 5 )   817 - 833   2020.1

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    The molecular biological mechanisms of Alzheimer's disease (ad) involve disease-associated cross-talk through many genes and include a loss of normal as well as a gain of abnormal interactions among genes. A protein domain network (PDN) is a collection of physical bindings that occur between protein domains, and the states of the PDNs in patients with ad are likely to be perturbed compared to those in normal healthy individuals. To identify PDN changes that cause neurodegeneration, we analysed the PDNs that occur among genes co-expressed in each of three brain regions at each stage of ad. Our analysis revealed that the PDNs collapsed with the progression of ad stage and identified five hub genes, including Rac1, as key players in PDN collapse. Using publicly available as well as our own gene expression data, we confirmed that the mRNA expression level of the RAC1 gene was downregulated in the entorhinal cortex (EC) of ad brains. To test the causality of these changes in neurodegeneration, we utilized Drosophila as a genetic model and found that modest knockdown of Rac1 in neurons was sufficient to cause age-dependent behavioural deficits and neurodegeneration. Finally, we identified a microRNA, hsa-miR-101-3p, as a potential regulator of RAC1 in ad brains. As the Braak neurofibrillary tangle (NFT) stage progressed, the expression levels of hsa-miR-101-3p were increased specifically in the EC. Furthermore, overexpression of hsa-miR-101-3p in the human neuronal cell line SH-SY5Y caused RAC1 downregulation. These results highlight the utility of our integrated network approach for identifying causal changes leading to neurodegeneration in ad.

    DOI: 10.1093/hmg/ddz320

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  • Human and mouse single-nucleus transcriptomics reveal TREM2-dependent and TREM2-independent cellular responses in Alzheimer's disease. Reviewed International journal

    Yingyue Zhou, Wilbur M Song, Prabhakar S Andhey, Amanda Swain, Tyler Levy, Kelly R Miller, Pietro L Poliani, Manuela Cominelli, Shikha Grover, Susan Gilfillan, Marina Cella, Tyler K Ulland, Konstantin Zaitsev, Akinori Miyashita, Takeshi Ikeuchi, Makoto Sainouchi, Akiyoshi Kakita, David A Bennett, Julie A Schneider, Michael R Nichols, Sean A Beausoleil, Jason D Ulrich, David M Holtzman, Maxim N Artyomov, Marco Colonna

    Nature medicine   26 ( 1 )   131 - 142   2020.1

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    Glia have been implicated in Alzheimer's disease (AD) pathogenesis. Variants of the microglia receptor triggering receptor expressed on myeloid cells 2 (TREM2) increase AD risk, and activation of disease-associated microglia (DAM) is dependent on TREM2 in mouse models of AD. We surveyed gene-expression changes associated with AD pathology and TREM2 in 5XFAD mice and in human AD by single-nucleus RNA sequencing. We confirmed the presence of Trem2-dependent DAM and identified a previously undiscovered Serpina3n+C4b+ reactive oligodendrocyte population in mice. Interestingly, remarkably different glial phenotypes were evident in human AD. Microglia signature was reminiscent of IRF8-driven reactive microglia in peripheral-nerve injury. Oligodendrocyte signatures suggested impaired axonal myelination and metabolic adaptation to neuronal degeneration. Astrocyte profiles indicated weakened metabolic coordination with neurons. Notably, the reactive phenotype of microglia was less evident in TREM2-R47H and TREM2-R62H carriers than in non-carriers, demonstrating a TREM2 requirement in both mouse and human AD, despite the marked species-specific differences.

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  • 脳脊髄液バイオマーカーによるAlzheimer's clinical syndromeの検討

    春日 健作, 月江 珠緒, 原 範和, 樋口 陽, 石黒 敬信, 徳武 孝允, 宮下 哲典, 小野寺 理, 池内 健

    臨床神経学   59 ( Suppl. )   S217 - S217   2019.11

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  • 家族性アルツハイマー病で同定された新規PSEN1遺伝子変異の病的意義の検討

    三浦 健, 目崎 直実, Zhu Bin, 村上 涼太, Liu Lixin, 樋口 陽, 石黒 敬信, 月江 珠緒, 原 範和, 春日 健作, 宮下 哲典, 小野寺 理, 池内 健

    臨床神経学   59 ( Suppl. )   S352 - S352   2019.11

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  • ヒト死後脳におけるAPP・APOEの遺伝子発現解析 Reviewed

    Lixin Liu, 宮下 哲典, 村上 涼太, Bin Zhu, 原 範和, 菊地 正隆, 月江 珠緒, 樋口 陽, 春日 健作, 中谷 明弘, 赤津 裕康, 柿田 明美, 村山 繁雄, 池内 健

    Dementia Japan   33 ( 4 )   519 - 519   2019.10

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  • 血漿炎症系サイトカインと脳脊髄液バイオマーカーとの関連

    樋口 陽, 春日 健作, Bin Zhu, Lixin Liu, 石黒 敬信, 徳武 孝允, 宮下 哲典, 小野寺 理, 池内 健

    Dementia Japan   33 ( 4 )   548 - 548   2019.10

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  • Enhancer variants associated with Alzheimer's disease affect gene expression via chromatin looping. Reviewed International journal

    Masataka Kikuchi, Norikazu Hara, Mai Hasegawa, Akinori Miyashita, Ryozo Kuwano, Takeshi Ikeuchi, Akihiro Nakaya

    BMC medical genomics   12 ( 1 )   128 - 128   2019.9

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    BACKGROUND: Genome-wide association studies (GWASs) have identified single-nucleotide polymorphisms (SNPs) that may be genetic factors underlying Alzheimer's disease (AD). However, how these AD-associated SNPs (AD SNPs) contribute to the pathogenesis of this disease is poorly understood because most of them are located in non-coding regions, such as introns and intergenic regions. Previous studies reported that some disease-associated SNPs affect regulatory elements including enhancers. We hypothesized that non-coding AD SNPs are located in enhancers and affect gene expression levels via chromatin loops. METHODS: To characterize AD SNPs within non-coding regions, we extracted 406 AD SNPs with GWAS p-values of less than 1.00 × 10- 6 from the GWAS catalog database. Of these, we selected 392 SNPs within non-coding regions. Next, we checked whether those non-coding AD SNPs were located in enhancers that typically regulate gene expression levels using publicly available data for enhancers that were predicted in 127 human tissues or cell types. We sought expression quantitative trait locus (eQTL) genes affected by non-coding AD SNPs within enhancers because enhancers are regulatory elements that influence the gene expression levels. To elucidate how the non-coding AD SNPs within enhancers affect the gene expression levels, we identified chromatin-chromatin interactions by Hi-C experiments. RESULTS: We report the following findings: (1) nearly 30% of non-coding AD SNPs are located in enhancers; (2) eQTL genes affected by non-coding AD SNPs within enhancers are associated with amyloid beta clearance, synaptic transmission, and immune responses; (3) 95% of the AD SNPs located in enhancers co-localize with their eQTL genes in topologically associating domains suggesting that regulation may occur through chromatin higher-order structures; (4) rs1476679 spatially contacts the promoters of eQTL genes via CTCF-CTCF interactions; (5) the effect of other AD SNPs such as rs7364180 is likely to be, at least in part, indirect through regulation of transcription factors that in turn regulate AD associated genes. CONCLUSION: Our results suggest that non-coding AD SNPs may affect the function of enhancers thereby influencing the expression levels of surrounding or distant genes via chromatin loops. This result may explain how some non-coding AD SNPs contribute to AD pathogenesis.

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  • APOE Promoter Polymorphism-219T/G is an Effect Modifier of the Influence of APOE ε4 on Alzheimer's Disease Risk in a Multiracial Sample. Reviewed International journal

    Kyu Yeong Choi, Jang Jae Lee, Tamil Iniyan Gunasekaran, Sarang Kang, Wooje Lee, Jangho Jeong, Ho Jae Lim, Xiaoling Zhang, Congcong Zhu, So-Yoon Won, Yu Yong Choi, Eun Hyun Seo, Seok Cheol Lee, Jungsoo Gim, Ji Yeon Chung, Ari Chong, Min Soo Byun, Sujin Seo, Pan-Woo Ko, Ji-Won Han, Catriona McLean, John Farrell, Kathryn L Lunetta, Akinori Miyashita, Norikazu Hara, Sungho Won, Seong-Min Choi, Jung-Min Ha, Jee Hyang Jeong, Ryozo Kuwano, Min Kyung Song, Seong Soo A An, Young Min Lee, Kyung Won Park, Ho-Won Lee, Seong Hye Choi, Sangmyung Rhee, Woo Keun Song, Jung Sup Lee, Richard Mayeux, Jonathan L Haines, Margaret A Pericak-Vance, I L Han Choo, Kwangsik Nho, Ki-Woong Kim, Dong Young Lee, SangYun Kim, Byeong C Kim, Hoowon Kim, Gyungah R Jun, Gerard D Schellenberg, Takeshi Ikeuchi, Lindsay A Farrer, Kun Ho Lee, Alzheimer's Disease Neuroimaging Initative

    Journal of clinical medicine   8 ( 8 )   2019.8

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    Variants in the APOE gene region may explain ethnic differences in the association of Alzheimer's disease (AD) with ε4. Ethnic differences in allele frequencies for three APOE region SNPs (single nucleotide polymorphisms) were identified and tested for association in 19,398 East Asians (EastA), including Koreans and Japanese, 15,836 European ancestry (EuroA) individuals, and 4985 African Americans, and with brain imaging measures of cortical atrophy in sub-samples of Koreans and EuroAs. Among ε4/ε4 individuals, AD risk increased substantially in a dose-dependent manner with the number of APOE promoter SNP rs405509 T alleles in EastAs (TT: OR (odds ratio) = 27.02, p = 8.80 × 10-94; GT: OR = 15.87, p = 2.62 × 10-9) and EuroAs (TT: OR = 18.13, p = 2.69 × 10-108; GT: OR = 12.63, p = 3.44 × 10-64), and rs405509-T homozygotes had a younger onset and more severe cortical atrophy than those with G-allele. Functional experiments using APOE promoter fragments demonstrated that TT lowered APOE expression in human brain and serum. The modifying effect of rs405509 genotype explained much of the ethnic variability in the AD/ε4 association, and increasing APOE expression might lower AD risk among ε4 homozygotes.

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  • A rare functional variant of SHARPIN attenuates the inflammatory response and associates with increased risk of late-onset Alzheimer's disease. Reviewed International journal

    Yuya Asanomi, Daichi Shigemizu, Akinori Miyashita, Risa Mitsumori, Taiki Mori, Norikazu Hara, Kaoru Ito, Shumpei Niida, Takeshi Ikeuchi, Kouichi Ozaki

    Molecular medicine (Cambridge, Mass.)   25 ( 1 )   20 - 20   2019.6

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    BACKGROUND: Late-onset Alzheimer's disease (LOAD), the most common form of dementia, results from complicated interactions among multiple environmental and genetic factors. Despite recent advances in genetic analysis of LOAD, more than half of the heritability for the disease remains unclear. Although genetic studies in Caucasians found rare risk variants for LOAD with large effect sizes, these variants are hardly detectable in the Japanese population. METHODS: To identify rare variants possibly explaining part of the genetic architecture for LOAD in Japanese people, we performed whole-exome sequencing analyses of 202 LOAD individuals without the APOE ε4 risk allele, a major genetic factor for LOAD susceptibility. We also implemented in vitro functional analyses of the variant(s) to reveal possible functions associated with LOAD risk. RESULTS: Via step-by-step selection of whole-exome variants, we found seven candidate risk variants. We then conducted a case-control association study in a large Japanese cohort consisting of 4563 cases and 16,459 controls. We finally identified a rare nonsynonymous variant, rs572750141 (NM_030974.3:p.Gly186Arg), in SHARPIN that was potentially associated with increased risk of LOAD (corrected P = 8.05 × 10- 5, odds ratio = 6.1). The amino acid change in SHARPIN resulted in aberrant cellular localization of the variant protein and attenuated the activation of NF-κB, a central mediator of inflammatory and immune responses. CONCLUSIONS: Our work identified a rare functional SHARPIN variant as a previously unknown genetic risk factor for LOAD. The functional alteration in SHARPIN induced by the rare coding variant is associated with an attenuated inflammatory/immune response that may promote LOAD development.

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  • 統合失調症患者の脳内ゲノムにおけるコピー数変異の評価

    坂井 美和子, 渡部 雄一郎, 染矢 俊幸, 荒木 一明, 澁谷 雅子, 新里 和弘, 大島 健一, 國井 泰人, 矢部 博興, 松本 純弥, 和田 明, 日野 瑞城, 橋本 健志, 菱本 明豊, 北村 登, 入谷 修司, 白川 治, 前田 潔, 宮下 哲典, 丹羽 真一, 高橋 均, 柿田 明美, 桑野 良三, 那波 宏之

    精神神経学雑誌   ( 2019特別号 )   S603 - S603   2019.6

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  • A variant at 9q34.11 is associated with HLA-DQB1*06:02 negative essential hypersomnia. Reviewed International journal

    Taku Miyagawa, Seik-Soon Khor, Hiromi Toyoda, Takashi Kanbayashi, Aya Imanishi, Yohei Sagawa, Nozomu Kotorii, Tatayu Kotorii, Yu Ariyoshi, Yuji Hashizume, Kimihiro Ogi, Hiroshi Hiejima, Yuichi Kamei, Akiko Hida, Masayuki Miyamoto, Azusa Ikegami, Yamato Wada, Masanori Takami, Yuichi Higashiyama, Ryoko Miyake, Hideaki Kondo, Yota Fujimura, Yoshiyuki Tamura, Yukari Taniyama, Naoto Omata, Yuji Tanaka, Shunpei Moriya, Hirokazu Furuya, Mitsuhiro Kato, Yoshiya Kawamura, Takeshi Otowa, Akinori Miyashita, Hiroto Kojima, Hiroh Saji, Mihoko Shimada, Maria Yamasaki, Takumi Kobayashi, Rumi Misawa, Yosuke Shigematsu, Ryozo Kuwano, Tsukasa Sasaki, Jun Ishigooka, Yuji Wada, Kazuhito Tsuruta, Shigeru Chiba, Fumiaki Tanaka, Naoto Yamada, Masako Okawa, Kenji Kuroda, Kazuhiko Kume, Koichi Hirata, Naohisa Uchimura, Tetsuo Shimizu, Yuichi Inoue, Yutaka Honda, Kazuo Mishima, Makoto Honda, Katsushi Tokunaga

    Journal of human genetics   63 ( 12 )   1259 - 1267   2018.12

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    Essential hypersomnia (EHS) is a lifelong disorder characterized by excessive daytime sleepiness without cataplexy. EHS is associated with human leukocyte antigen (HLA)-DQB1*06:02, similar to narcolepsy with cataplexy (narcolepsy). Previous studies suggest that DQB1*06:02-positive and -negative EHS are different in terms of their clinical features and follow different pathological pathways. DQB1*06:02-positive EHS and narcolepsy share the same susceptibility genes. In the present study, we report a genome-wide association study with replication for DQB1*06:02-negative EHS (408 patients and 2247 healthy controls, all Japanese). One single-nucleotide polymorphism, rs10988217, which is located 15-kb upstream of carnitine O-acetyltransferase (CRAT), was significantly associated with DQB1*06:02-negative EHS (P = 7.5 × 10-9, odds ratio = 2.63). The risk allele of the disease-associated SNP was correlated with higher expression levels of CRAT in various tissues and cell types, including brain tissue. In addition, the risk allele was associated with levels of succinylcarnitine (P = 1.4 × 10-18) in human blood. The leading SNP in this region was the same in associations with both DQB1*06:02-negative EHS and succinylcarnitine levels. The results suggest that DQB1*06:02-negative EHS may be associated with an underlying dysfunction in energy metabolic pathways.

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  • Enhancer variants associated with Alzheimer's disease affect gene expression via chromatin looping

    Masataka Kikuchi, Norikazu Hara, Mai Hasegawa, Akinori Miyashita, Ryozo Kuwano, Takeshi Ikeuchi, Akihiro Nakaya

    bioRxiv   2018.9

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  • The physiological and pathological biophysics of phase separation and gelation of RNA binding proteins in amyotrophic lateral sclerosis and fronto-temporal lobar degeneration Reviewed

    Peter St George-Hyslop, Julie Qiaojin Lin, Akinori Miyashita, Emma C. Phillips, Seema Qamar, Suzanne J. Randle, GuoZhen Wang

    Brain Research   1693 ( Pt A )   11 - 23   2018.8

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  • FUS Phase Separation Is Modulated by a Molecular Chaperone and Methylation of Arginine Cation-π Interactions. Reviewed

    Qamar S, Wang G, Randle SJ, Ruggeri FS, Varela JA, Lin JQ, Phillips EC, Miyashita A, Williams D, Ströhl F, Meadows W, Ferry R, Dardov VJ, Tartaglia GG, Farrer LA, Kaminski Schierle GS, Kaminski CF, Holt CE, Fraser PE, Schmitt-Ulms G, Klenerman D, Knowles T, Vendruscolo M, St George-Hyslop P

    Cell   173 ( 3 )   720 - 734.e15   2018.4

  • A variant in CRAT is associated with HLA-DQB1*06:02 negative essential hypersomnia (narcolepsy without cataplexy and idiopathic hypersomnia without long sleep time) Reviewed

    Miyagawa T, Khor S-S, Toyoda H, Kanbayashi T, Imanishi A, Sagawa Y, Kotorii N, Kotorii T, Ariyoshi Y, Hashizume Y, Ogi K, Hiejima H, Kamei Y, Hida A, Miyamoto M, Ikegami A, Wada Y, Takami M, Higashiyama Y, Miyake R, Kondo H, Fujimura Y, Tamura Y, Taniyama Y, Omata N, Tanaka Y, Moriya S, Furuya H, Kato M, Kawamura Y, Otowa T, Miyashita A, Kojima H, Saji H, Shimada M, Yamasaki M, Kobayashi T, Misawa R, Kuwano R, Sasaki T, Ishigooka J, Wada Y, Tsuruta K, Chiba S, Tanaka F, Yamada N, Okawa M, Kuroda K, Kume K, Hirata K, Uchimura N, Shimizu T, Inoue Y, Honda Y, Mishima K, Honda M, Tokunaga K

    Journal of Human Genetics   (in press)   2018

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  • Serum microRNA miR-501-3p as a potential biomarker related to the progression of Alzheimer's disease Reviewed

    Norikazu Hara, Masataka Kikuchi, Akinori Miyashita, Hiroyuki Hatsuta, Yuko Saito, Kensaku Kasuga, Shigeo Murayama, Takeshi Ikeuchi, Ryozo Kuwano

    ACTA NEUROPATHOLOGICA COMMUNICATIONS   5 ( 1 )   10   2017.1

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    MicroRNAs (miRNAs) are attractive molecules to utilize as one of the blood-based biomarkers for neurodegenerative disorders such as Alzheimer's disease (AD) because miRNAs are relatively stable in biofluid, including serum or plasma. To determine blood miRNA biomarkers for AD with next-generation sequencing genome-wide, we first surveyed 45 serum samples. These came from 27 AD patients and 18 controls (discovery set) that underwent autopsy within two weeks after their serum sampling and were neuropathologically diagnosed. We found that three miRNAs, hsa-miR-501-3p, hsa-let-7f-5p, and hsa-miR-26b-5p, were significantly deregulated between the AD samples and the controls. The deregulation for hsa-miR-501-3p was further confirmed by quantitative reverse transcription polymerase chain reaction (PCR) in a validation set composed of 36 clinically diagnosed AD patients and 22 age-matched cognitively normal controls with a sensitivity and specificity of 53% and 100%, respectively (area under the curve = 0.82). Serum hsa-miR-501-3p levels were downregulated in AD patients, and its lower levels significantly correlated with lower Mini-Mental State Examination scores. Contrary to its serum levels, we found that hsa-miR-501-3p was remarkably upregulated in the same donors' AD brains obtained at autopsy from the discovery set. The hsa-miR-501-3p overexpression in cultured cells, which mimicked the hsa-miR-501-3p upregulation in the AD brains, induced significant downregulation of 128 genes that overrepresented the Gene Ontology terms, DNA replication, and the mitotic cell cycle. Our results suggest that hsa-miR-501-3p is a novel serum biomarker that presumably corresponds to pathological events occurring in AD brains.

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  • Evaluation of polygenic risks for narcolepsy and essential hypersomnia Reviewed

    Maria Yamasaki, Taku Miyagawa, Hiromi Toyoda, Seik-Soon Khor, Xiaoxi Liu, Hitoshi Kuwabara, Yukiko Kano, Takafumi Shimada, Toshiro Sugiyama, Hisami Nishida, Nagisa Sugaya, Mamoru Tochigi, Takeshi Otowa, Yuji Okazaki, Hisanobu Kaiya, Yoshiya Kawamura, Akinori Miyashita, Ryozo Kuwano, Kiyoto Kasai, Hisashi Tanii, Tsukasa Sasaki, Yutaka Honda, Makoto Honda, Katsushi Tokunaga

    JOURNAL OF HUMAN GENETICS   61 ( 10 )   873 - 878   2016.10

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    In humans, narcolepsy is a sleep disorder that is characterized by sleepiness, cataplexy and rapid eye movement (REM) sleep abnormalities. Essential hypersomnia (EHS) is another type of sleep disorder that is characterized by excessive daytime sleepiness without cataplexy. A human leukocyte antigen (HLA) class II allele, HLA-DQB1*06:02, is a major genetic factor for narcolepsy. Almost all narcoleptic patients are carriers of this HLA allele, while 30-50% of EHS patients and 12% of all healthy individuals in Japan carry this allele. The pathogenesis of narcolepsy and EHS is thought to be partially shared. To evaluate the contribution of common single-nucleotide polymorphisms (SNPs) to narcolepsy onset and to assess the common genetic background of narcolepsy and EHS, we conducted a polygenic analysis that included 393 narcoleptic patients, 38 EHS patients with HLA-DQB1*06:02, 119 EHS patients without HLA-DQB1*06:02 and 1582 healthy individuals. We also included 376 individuals with panic disorder and 213 individuals with autism to confirm whether the results were biased. Polygenic risks in narcolepsy were estimated to explain 58.1% (PHLA-DQB1*06:02 = 2.30 x 10(-48), Pwhole genome without HLA-DQB1*06:02 = 6.73 x 10(-2)) including HLA-DQB1*06:02 effects and 1.3% (Pwhole genome without HLA-DQB1*06:02 = 2.43 x 10(-2)) excluding HLA-DQB1*06:02 effects. The results also indicated that small-effect SNPs contributed to the development of narcolepsy. Reported susceptibility SNPs for narcolepsy in the Japanese population, CPT1B (carnitine palmitoyltransferase 1B), TRA@ (T-cell receptor alpha) and P2RY11 (purinergic receptor P2Y, G-protein coupled, 11), were found to explain 0.8% of narcolepsy onset (P-whole genome without (HLA-DQB1*06:02) = 9.74 x 10(-2)). EHS patients with HLA-DQB1*06:02 were estimated to have higher shared genetic background to narcoleptic patients than EHS patients without HLA-DQB1*06:02 even when the effects of HLA-DQB1*06:02 were excluded (EHS with HLA-DQB1*06:02: 40.4%, PHLA-DQB1*06:02 = 7.02 x 10(-14), Pwhole genome without HLA-DQB1*06:02 = 1.34 x 10(-1), EHS without HLA-DQB1*06:02: 0.4%, Pwhole genome without HLA-DQB1*06:02 = 3.06 x 10(-1)). Meanwhile, the polygenic risks for narcolepsy could not explain the onset of panic disorder and autism, suggesting that our results were reasonable.

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  • Candidate genes in panic disorder: meta-analyses of 23 common variants in major anxiogenic pathways Reviewed

    A. S. Howe, H. N. Buttenschon, A. Bani-Fatemi, E. Maron, T. Otowa, A. Erhardt, E. B. Binder, N. O. Gregersen, O. Mors, D. P. Woldbye, K. Domschke, A. Reif, J. Shlik, S. Koks, Y. Kawamura, A. Miyashita, R. Kuwano, K. Tokunaga, H. Tanii, J. W. Smoller, T. Sasaki, D. Koszycki, V. De Luca

    MOLECULAR PSYCHIATRY   21 ( 5 )   665 - 679   2016.5

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    The utilization of molecular genetics approaches in examination of panic disorder (PD) has implicated several variants as potential susceptibility factors for panicogenesis. However, the identification of robust PD susceptibility genes has been complicated by phenotypic diversity, underpowered association studies and ancestry-specific effects. In the present study, we performed a succinct review of case-control association studies published prior to April 2015. Meta-analyses were performed for candidate gene variants examined in at least three studies using the Cochrane Mantel-Haenszel fixed-effect model. Secondary analyses were also performed to assess the influences of sex, agoraphobia co-morbidity and ancestry-specific effects on panicogenesis. Meta-analyses were performed on 23 variants in 20 PD candidate genes. Significant associations after correction for multiple testing were observed for three variants, TMEM132D rs7370927 (T allele: odds ratio (OR) = 1.27, 95% confidence interval (CI): 1.15-1.40, P = 2.49 x 10(-6)), rs11060369 (CC genotype: OR = 0.65, 95% CI: 0.53-0.79, P = 1.81 x 10(-5)) and COMT rs4680 (Val (G) allele: OR = 1.27, 95% CI: 1.14-1.42, P = 2.49 x 10(-5)) in studies with samples of European ancestry. Nominal associations that did not survive correction for multiple testing were observed for NPSR1 rs324891 (T allele: OR = 1.22, 95% CI: 1.07-1.38, P = 0.002), TPH1 rs1800532 (AA genotype: OR = 1.46, 95% CI: 1.14-1.89, P = 0.003) and HTR2A rs6313 (T allele: OR = 1.19, 95% CI: 1.07-1.33, P = 0.002) in studies with samples of European ancestry and for MAOA-uVNTR in female PD (low-active alleles: OR = 1.21, 95% CI: 1.07-1.38, P = 0.004). No significant associations were observed in the secondary analyses considering sex, agoraphobia co-morbidity and studies with samples of Asian ancestry. Although these findings highlight a few associations, PD likely involves genetic variation in a multitude of biological pathways that is diverse among populations. Future studies must incorporate larger sample sizes and genome-wide approaches to further quantify the observed genetic variation among populations and subphenotypes of PD.

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  • Polymorphisms in the TMEM132D region are associated with panic disorder in HLA-DRB1*13:02-negative individuals of a Japanese population. Reviewed International journal

    Shimada-Sugimoto M, Otowa T, Miyagawa T, Khor SS, Omae Y, Toyo-Oka L, Sugaya N, Kawamura Y, Umekage T, Miyashita A, Kuwano R, Kaiya H, Kasai K, Tanii H, Okazaki Y, Tokunaga K, Sasaki T

    Human genome variation   3   16001 - 16001   2016

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    We herein report an association between TMEM132D and panic disorder (PD) in a Japanese population, evaluating the effects of HLA-DRB1*13:02, which we previously reported as a susceptibility genetic factor for PD. SNPs in TMEM132D showed significant associations with PD in subjects without HLA-DRB1*13:02 (rs4759997; P=5.02×10(-6), odds ratio=1.50) but not in those with the HLA allele. TMEM132D might have a role in the development of PD in subjects without HLA-DRB1*13:02.

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  • ALS/FTD Mutation-Induced Phase Transition of FUS Liquid Droplets and Reversible Hydrogels into Irreversible Hydrogels Impairs RNP Granule Function Reviewed

    Tetsuro Murakami, Seema Qamar, Julie Qiaojin Lin, Gabriele S. Kaminski Schierle, Eric Rees, Akinori Miyashita, Ana R. Costa, Roger B. Dodd, Fiona T. S. Chan, Claire H. Michel, Deborah Kronenberg-Versteeg, Yi Li, Seung-Pil Yang, Yosuke Wakutani, William Meadows, Rodylyn Rose Ferry, Liang Dong, Gian Gaetano Tartaglia, Giorgio Favrin, Wen-Lang Lin, Dennis W. Dickson, Mei Zhen, David Ron, Gerold Schmitt-Ulms, Paul E. Fraser, Neil A. Shneider, Christine Holt, Michele Vendruscolo, Clemens F. Kaminski, Peter St George-Hyslop

    NEURON   88 ( 4 )   678 - 690   2015.11

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    The mechanisms by which mutations in FUS and other RNA binding proteins cause ALS and FTD remain controversial. We propose a model in which low-complexity (LC) domains of FUS drive its physiologically reversible assembly into membrane-free, liquid droplet and hydrogel-like structures. ALS/FTD mutations in LC or non-LC domains induce further phase transition into poorly soluble fibrillar hydrogels distinct from conventional amyloids. These assemblies are necessary and sufficient for neurotoxicity in a C. elegans model of FUS-dependent neurodegeneration. They trap other ribonucleoprotein (RNP) granule components and disrupt RNP granule function. One consequence is impairment of new protein synthesis by cytoplasmic RNP granules in axon terminals, where RNP granules regulate local RNA metabolism and translation. Nuclear FUS granules may be similarly affected. Inhibiting formation of these fibrillar hydrogel assemblies mitigates neurotoxicity and suggests a potential therapeutic strategy that may also be applicable to ALS/FTD associated with mutations in other RNA binding proteins.

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  • A polymorphism in CCR1/CCR3 is associated with narcolepsy Reviewed

    Hiromi Toyoda, Taku Miyagawa, Asako Koike, Takashi Kanbayashi, Aya Imanishi, Yohei Sagawa, Nozomu Kotorii, Tatayu Kotorii, Yuji Hashizume, Kimihiro Ogi, Hiroshi Hiejima, Yuichi Kamei, Akiko Hida, Masayuki Miyamoto, Makoto Imai, Yota Fujimura, Yoshiyuki Tamura, Azusa Ikegami, Yamato Wada, Shunpei Moriya, Hirokazu Furuya, Masaki Takeuchi, Yohei Kirino, Akira Meguro, Elaine F. Remmers, Yoshiya Kawamura, Takeshi Otowa, Akinori Miyashita, Koichi Kashiwase, Seik-Soon Khor, Maria Yamasaki, Ryozo Kuwano, Tsukasa Sasaki, Jun Ishigooka, Kenji Kuroda, Kazuhiko Kume, Shigeru Chiba, Naoto Yamada, Masako Okawa, Koichi Hirata, Nobuhisa Mizuki, Naohisa Uchimura, Tetsuo Shimizu, Yuichi Inoue, Yutaka Honda, Kazuo Mishima, Makoto Honda, Katsushi Tokunaga

    BRAIN BEHAVIOR AND IMMUNITY   49   148 - 155   2015.10

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    Etiology of narcolepsy-cataplexy involves multiple genetic and environmental factors. While the human leukocyte antigen (HLA)-DRB1*15:01-DQB1*06:02 haplotype is strongly associated with narcolepsy, it is not sufficient for disease development. To identify additional, non-HLA susceptibility genes, we conducted a genome-wide association study (GWAS) using Japanese samples.
    An initial sample set comprising 409 cases and 1562 controls was used for the GWAS of 525,196 single nucleotide polymorphisms (SNPs) located outside the HLA region. An independent sample set comprising 240 cases and 869 controls was then genotyped at 37 SNPs identified in the GWAS. We found that narcolepsy was associated with a SNP in the promoter region of chemokine (C-C motif) receptor 1 (CCR1) (rs3181077, P = 1.6 x 10(-5), odds ratio [OR] = 1.86). This rs3181077 association was replicated with the independent sample set (P = 0.032, OR = 1.36). We measured mRNA levels of candidate genes in peripheral blood samples of 38 cases and 37 controls. CCR1 and CCR3 mRNA levels were significantly lower in patients than in healthy controls, and CCR1 mRNA levels were associated with rs3181077 genotypes. In vitro chemotaxis assays were also performed to measure monocyte migration. We observed that monocytes from carriers of the rs3181077 risk allele had lower migration indices with a CCR1 ligand.
    CCR1 and CCR3 are newly discovered susceptibility genes for narcolepsy. These results highlight the potential role of CCR genes in narcolepsy and support the hypothesis that patients with narcolepsy have impaired immune function. (C) 2015 Elsevier Inc. All rights reserved.

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  • Alzpathway, an updated map of curated signaling pathways: Towards deciphering Alzheimer's disease pathogenesis Reviewed

    Soichi Ogishima, Satoshi Mizuno, Masataka Kikuchi, Akinori Miyashita, Ryozo Kuwano, Hiroshi Tanaka, Jun Nakaya

    Systems Biology of Alzheimer's Disease   1303   423 - 432   2015.8

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    Alzheimer's disease (AD) is a complex neurodegenerative disorder in which loss of neurons and synaptic function causes dementia in the elderly. To clarify AD pathogenesis and develop drugs for AD, thousands of studies have elucidated signaling pathways involved. However, knowledge of AD signaling pathways has not been compiled as a pathway map. In this chapter, we introduce the manual construction of a pathway map in AD which we call "AlzPathway", that comprehensively catalogs signaling pathways in the field of AD. We have collected and manually curated over 100 review articles related to AD, and have built the AD pathway map. AlzPathway is currently composed of thousands of molecules and reactions in neurons, brain blood barrier, presynaptic, postsynaptic, astrocyte, and microglial cells, with their cellular localizations. AlzPathway provides a systems-biology platform of comprehensive AD signaling and related pathways which is expected to contribute to clarification of AD pathogenesis and AD drug development.

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  • Network-based analysis for uncovering mechanisms underlying Alzheimer's disease Reviewed

    Masataka Kikuchi, Soichi Ogishima, Satoshi Mizuno, Akinori Miyashita, Ryozo Kuwano, Jun Nakaya, Hiroshi Tanaka

    Systems Biology of Alzheimer's Disease   1303   479 - 491   2015.8

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    Alzheimer's disease (AD) is known to be a multifactorial neurodegenerative disorder, and is one of the main causes of dementia in the elderly. Many studies have demonstrated molecules involved in the pathogenesis of AD, however its underlying mechanisms remain obscure. It may be simplistic to try to explain the disease based on the role of a few genes only. Accumulating new, huge amount of information from e.g. genome, proteome and interactome datasets and new knowledge, we are now able to clarify and characterize diseases essentially as a result of dysfunction of molecular networks. Recent studies have indicated that relevant genes affected in human diseases concentrate in a part of the network, often called as "disease module." In the case of AD, some disease-associated pathways seem different, but some of them are clearly disease-related and coherent. This suggests the existence of a common pathway that negatively drives from healthy state to disease state (i.e., the disease module(s)). Additionally, such disease modules should dynamically change through AD progression. Thus, network-level approaches are indispensable to address unknown mechanisms of AD. In this chapter, we introduce network strategies using gene co-expression and protein interaction networks.

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  • Assessment of copy number variations in the brain genome of schizophrenia patients Reviewed

    Miwako Sakai, Yuichiro Watanabe, Toshiyuki Someya, Kazuaki Araki, Masako Shibuya, Kazuhiro Niizato, Kenichi Oshima, Yasuto Kunii, Hirooki Yabe, Junya Matsumoto, Akira Wada, Mizuki Hino, Takeshi Hashimoto, Akitoyo Hishimoto, Noboru Kitamura, Shuji Iritani, Osamu Shirakawa, Kiyoshi Maeda, Akinori Miyashita, Shin-ichi Niwa, Hitoshi Takahashi, Akiyoshi Kakita, Ryozo Kuwano, Hiroyuki Nawa

    MOLECULAR CYTOGENETICS   8   46   2015.7

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    Background: Cytogenomic mutations and chromosomal abnormality are implicated in the neuropathology of several brain diseases. Cell heterogeneity of brain tissues makes their detection and validation difficult, however. In the present study, we analyzed gene dosage alterations in brain DNA of schizophrenia patients and compared those with the copy number variations (CNVs) identified in schizophrenia patients as well as with those in Asian lymphocyte DNA and attempted to obtain hints at the pathological contribution of cytogenomic instability to schizophrenia.
    Results: Brain DNA was extracted from postmortem striatum of schizophrenia patients and control subjects (n = 48 each) and subjected to the direct two color microarray analysis that limits technical data variations. Disease-associated biases of relative DNA doses were statistically analyzed with Bonferroni's compensation on the premise of brain cell mosaicism. We found that the relative gene dosage of 85 regions significantly varied among a million of probe sites. In the candidate CNV regions, 26 regions had no overlaps with the common CNVs found in Asian populations and included the genes (i.e., ANTXRL, CHST9, DNM3, NDST3, SDK1, STRC, SKY) that are associated with schizophrenia and/or other psychiatric diseases. The majority of these candidate CNVs exhibited high statistical probabilities but their signal differences in gene dosage were less than 1.5-fold. For test evaluation, we rather selected the 10 candidate CNV regions that exhibited higher aberration scores or larger global effects and were thus confirmable by PCR. Quantitative PCR verified the loss of gene dosage at two loci (1p36.21 and 1p13.3) and confirmed the global variation of the copy number distributions at two loci (11p15.4 and 13q21.1), both indicating the utility of the present strategy. These test loci, however, exhibited the same somatic CNV patterns in the other brain region.
    Conclusions: The present study lists the candidate regions potentially representing cytogenomic CNVs in the brain of schizophrenia patients, although the significant but modest alterations in their brain genome doses largely remain to be characterized further.

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  • Systematic review and meta-analysis of Japanese familial Alzheimer's disease and FTDP-17 Reviewed

    Kensaku Kasuga, Masataka Kikuchi, Takayoshi Tokutake, Akihiro Nakaya, Toshiyuki Tezuka, Tamao Tsukie, Norikazu Hara, Akinori Miyashita, Ryozo Kuwano, Takeshi Ikeuchi

    JOURNAL OF HUMAN GENETICS   60 ( 5 )   281 - 283   2015.5

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    Mutations in APP, PSEN1 and PSEN2 as the genetic causes of familial Alzheimer's disease (FAD) have been found in various ethnic populations. A substantial number of FAD pedigrees with mutations have been reported in the Japanese population; however, it remains unclear whether the genetic and clinical features of FAD in the Japanese population differ from those in other populations. To address this issue, we conducted a systematic review and meta-analysis of Japanese FAD and frontotemporal dementia with parkinsonism linked to chromosome 17 (FTDP-17) by literature search. Using this analysis, we identified 39 different PSEN1 mutations in 140 patients, 5 APP mutations in 35 patients and 16 MAPT mutations in 84 patients. There was no PSEN2 mutation among Japanese patients. The age at onset in Japanese FAD patients with PSEN1 mutations was significantly younger than that in patients with APP mutations. Kaplan-Meier analysis revealed that patients with MAPT mutations showed a shorter survival than patients with PSEN1 or APP mutations. Patients with mutations in different genes exhibit characteristic clinical presentations, suggesting that mutations in causative genes may modify the clinical presentations. By collecting and cataloging genetic and clinical information on Japanese FAD and FTDP-17, we developed an original database designated as Japanese Familial Alzheimer's Disease Database, which is accessible at http://alzdb.bri. niigata-u.ac.jp/.

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  • Immune-related pathways including HLA-DRB1*13:02 are associated with panic disorder Reviewed

    Mihoko Shimada-Sugimoto, Takeshi Otowa, Taku Miyagawa, Seik-Soon Khor, Koichi Kashiwase, Nagisa Sugaya, Yoshiya Kawamura, Tadashi Umekage, Hiroto Kojima, Hiroh Saji, Akinori Miyashita, Ryozo Kuwano, Hisanobu Kaiya, Kiyoto Kasai, Hisashi Tanii, Yuji Okazaki, Katsushi Tokunaga, Tsukasa Sasaki

    BRAIN BEHAVIOR AND IMMUNITY   46   96 - 103   2015.5

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    Panic disorder (PD) is an anxiety disorder characterized by panic attacks and anticipatory anxiety. Both genetic and environmental factors are thought to trigger PD onset. Previously, we performed a genome-wide association study (GWAS) for PD and focused on candidate SNPs with the lowest P values. However, there seemed to be a number of polymorphisms which did not reach genome-wide significance threshold due to their low allele frequencies and odds ratios, even though they were truly involved in pathogenesis. Therefore we performed pathway analyses in order to overcome the limitations of conventional single-marker analysis and identify associated SNPs with modest effects. Each pathway analysis indicated that pathways related to immunity showed the strongest association with PD (DAVID, P = 2.08 x 10(-6); i-GSEA4GWAS, P &lt; 10(-3); ICSNPathway, P &lt; 10(-3)). Based on the results of pathway analyses and the previously performed GWAS for PD, we focused on and investigated HIA-B and HLA-DRB1 as candidate susceptibility genes for PD. We typed HLA-B and HLA-DRB1 in 744 subjects with PD and 1418 control subjects. Patients with PD were significantly more likely to carry HLA-DRB1*13:02 (P = 2.50 x 10(-4), odds ratio = 1.54). Our study provided initial evidence that HLA-DRB1*13:02 and genes involved in immune-related pathways are associated with PD. Future studies are necessary to confirm these results and clarify the underlying mechanisms causing PD. (C) 2015 Elsevier Inc. All rights reserved.

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  • Role of the p.E66Q variant of GLA in the progression of chronic kidney disease Reviewed

    Hirofumi Watanabe, Shin Goto, Akinori Miyashita, Hiroki Maruyama, Minako Wakasugi, Akio Yokoseki, Ryozo Kuwano, Ichiei Narita

    CLINICAL AND EXPERIMENTAL NEPHROLOGY   19 ( 2 )   225 - 230   2015.4

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    The p.E66Q variant of the alpha-galactosidase A gene (GLA) is frequently found during screening for Fabry disease in dialysis patients in Japan. However, recent reports suggest that the p.E66Q variant is not a disease-causing mutation but is a risk factor for cerebral small-vessel occlusion. To evaluate the role of the p.E66Q in the progression of renal diseases, we performed a genetic association study in patients with chronic kidney disease (CKD).
    In this study, we enrolled 1651 chronic hemodialysis and 941 non-dialysis patients who attended medical institutions in the Niigata Prefecture, Japan. The frequency of the p.E66Q allele was compared between hemodialysis and non-dialysis patients, with data from a previously published study of Japanese male newborns. In addition, we compared estimated glomerular filtration rates (eGFR) in the presence or absence of the p.E66Q variant in non-dialysis patients.
    Of the 2233 alleles in hemodialysis and 1447 alleles in non-dialysis patients, 21 and nine harbored p.E66Q, respectively. However, p.E66Q allele frequencies did not differ between the two patient groups (0.90 versus 0.62 %, P = 0.35), and no significant difference in p.E66Q allele frequency was observed between male hemodialysis patients and the general Japanese population (0.52 versus 0.63 %, P = 0.67). Moreover, eGFR did not significantly differ between non-dialysis patients with the p.E66Q variant and patients with the wild-type allele (65.5 +/- A 10.7 versus 62.7 +/- A 16.6 mL/min/1.73 m(2), P = 0.69).
    This study indicated that the p.E66Q variant of GLA does not affect the progression of CKD.

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  • Reduced plasma desmosterol-to-cholesterol ratio and longitudinal cognitive decline in Alzheimer's disease Reviewed

    Yoshiaki Sato, Francois Bernier, Yasukazu Yamanaka, Ken Aoshima, Yoshiya Oda, Martin Ingelsson, Lars Lannfelt, Akinori Miyashita, Ryozo Kuwano, Takeshi Ikeuchi

    Alzheimer's and Dementia: Diagnosis, Assessment and Disease Monitoring   1 ( 1 )   67 - 74   2015

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    Background: We here examined whether plasma desmosterol-to-cholesterol ratio (DES/CHO) is decreased in patients with Alzheimer's disease (AD) and investigated the association between plasma DES/CHO and longitudinal cognitive decline. Methods: Plasma DES/CHO of AD patients and age-matched controls in a Japanese cross-sectional cohort was determined. Plasma DES/CHO at baseline and follow-up visits was assessed in relation to cognitive decline in Japanese and Swedish longitudinal cohorts. Results: Plasma DES/CHO was significantly reduced in Japanese AD patients and significantly correlated with Mini-Mental State Examination (MMSE) score. The longitudinal analysis revealed that plasma DES/CHO in AD patients shows a significant decrease at follow-up intervals. The decline in plasma DES/CHO is larger in the AD group with rapid progression than in that with slow progression. The changes in plasma DES/CHO significantly correlated with changes in the MMSE score. Conclusion: Plasma DES/CHO is decreased in AD patients and may serve as a longitudinal surrogate marker associated with cognitive decline.

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  • Genes associated with the progression of neurofibrillary tangles in Alzheimer's disease Reviewed

    A. Miyashita, H. Hatsuta, M. Kikuchi, A. Nakaya, Y. Saito, T. Tsukie, N. Hara, S. Ogishima, N. Kitamura, K. Akazawa, A. Kakita, H. Takahashi, S. Murayama, Y. Ihara, T. Ikeuchi, R. Kuwano

    TRANSLATIONAL PSYCHIATRY   4   e396   2014.6

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    The spreading of neurofibrillary tangles (NFTs), intraneuronal aggregates of highly phosphorylated microtubule-associated protein tau, across the human brain is correlated with the cognitive severity of Alzheimer's disease (AD). To identify genes relevant to NFT expansion defined by the Braak stage, we conducted whole-genome exon array analysis with an exploratory sample set consisting of 213 human post-mortem brain tissue specimens from the entorinal, temporal and frontal cortices of 71 brain-donor subjects: Braak NFT stages 0 (N = 13), I-II (N = 20), III-IV (N = 19) and V-VI (N = 19). We identified eight genes, RELN, PTGS2, MYO5C, TRIL, DCHS2, GRB14, NPAS4 and PHYHD1, associated with the Braak stage. The expression levels of three genes, PHYHD1, MYO5C and GRB14, exhibited reproducible association on real-time quantitative PCR analysis. In another sample set, including control subjects (N = 30), and in patients with late-onset AD (N = 37), dementia with Lewy bodies (N = 17) and Parkinson disease (N = 36), the expression levels of two genes, PHYHD1 and MYO5C, were obviously associated with late-onset AD. Protein-protein interaction network analysis with a public database revealed that PHYHD1 interacts with MYO5C via POT1, and PHYHD1 directly interacts with amyloid beta-peptide 42. It is thus likely that functional failure of PHYHD1 and MYO5C could lead to AD development.

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  • Clinical and neuroimaging features of patient with early-onset Parkinson's disease with dementia carrying SNCA p.G51D mutation Reviewed

    Takayoshi Tokutake, Atsuhi Ishikawa, Nahoko Yoshimura, Akinori Miyashita, Ryozo Kuwano, Masatoyo Nishizawa, Takeshi Ikeuchi

    PARKINSONISM & RELATED DISORDERS   20 ( 2 )   262 - 264   2014.2

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  • Lack of genetic association between TREM2 and late-onset Alzheimer's disease in a Japanese population. Reviewed International journal

    Akinori Miyashita, Yanan Wen, Nobutaka Kitamura, Etsuro Matsubara, Takeshi Kawarabayashi, Mikio Shoji, Naoki Tomita, Katsutoshi Furukawa, Hiroyuki Arai, Takashi Asada, Yasuo Harigaya, Masaki Ikeda, Masakuni Amari, Haruo Hanyu, Susumu Higuchi, Masatoyo Nishizawa, Masaichi Suga, Yasuhiro Kawase, Hiroyasu Akatsu, Masaki Imagawa, Tsuyoshi Hamaguchi, Masahito Yamada, Takashi Morihara, Masatoshi Takeda, Takeo Takao, Kenji Nakata, Ken Sasaki, Ken Watanabe, Kenji Nakashima, Katsuya Urakami, Terumi Ooya, Mitsuo Takahashi, Takefumi Yuzuriha, Kayoko Serikawa, Seishi Yoshimoto, Ryuji Nakagawa, Yuko Saito, Hiroyuki Hatsuta, Shigeo Murayama, Akiyoshi Kakita, Hitoshi Takahashi, Haruyasu Yamaguchi, Kohei Akazawa, Ichiro Kanazawa, Yasuo Ihara, Takeshi Ikeuchi, Ryozo Kuwano

    Journal of Alzheimer's disease : JAD   41 ( 4 )   1031 - 8   2014

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    Rare non-synonymous variants of TREM2 have recently been shown to be associated with Alzheimer's disease (AD) in Caucasians. We here conducted a replication study using a well-characterized Japanese sample set, comprising 2,190 late-onset AD (LOAD) cases and 2,498 controls. We genotyped 10 non-synonymous variants (Q33X, Y38C, R47H, T66M, N68K, D87N, T96K, R98W, H157Y, and L211P) of TREM2 reported by Guerreiro et al. (2013) by means of the TaqMan and dideoxy sequencing methods. Only three variants, R47H, H157Y, and L211P, were polymorphic (range of minor allele frequency [MAF], 0.0002-0.0059); however, no significant association with LOAD was observed in these variants. Considering low MAF of variants examined and our study sample size, further genetic analysis with a larger sample set is needed to firmly evaluate whether or not TREM2 is associated with LOAD in Japanese.

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  • Identification of Unstable Network Modules Reveals Disease Modules Associated with the Progression of Alzheimer's Disease Reviewed

    Masataka Kikuchi, Soichi Ogishima, Tadashi Miyamoto, Akinori Miyashita, Ryozo Kuwano, Jun Nakaya, Hiroshi Tanaka

    PLOS ONE   8 ( 11 )   e76162   2013.11

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    Alzheimer's disease (AD), the most common cause of dementia, is associated with aging, and it leads to neuron death. Deposits of amyloid beta and aberrantly phosphorylated tau protein are known as pathological hallmarks of AD, but the underlying mechanisms have not yet been revealed. A high-throughput gene expression analysis previously showed that differentially expressed genes accompanying the progression of AD were more down-regulated than up-regulated in the later stages of AD. This suggested that the molecular networks and their constituent modules collapsed along with AD progression. In this study, by using gene expression profiles and protein interaction networks (PINs), we identified the PINs expressed in three brain regions: the entorhinal cortex (EC), hippocampus (HIP) and superior frontal gyrus (SFG). Dividing the expressed PINs into modules, we examined the stability of the modules with AD progression and with normal aging. We found that in the AD modules, the constituent proteins, interactions and cellular functions were not maintained between consecutive stages through all brain regions. Interestingly, the modules were collapsed with AD progression, specifically in the EC region. By identifying the modules that were affected by AD pathology, we found the transcriptional regulation-associated modules that interact with the proteasome-associated module via UCHL5 hub protein, which is a deubiquitinating enzyme. Considering PINs as a system made of network modules, we found that the modules relevant to the transcriptional regulation are disrupted in the EC region, which affects the ubiquitin-proteasome system.

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  • A Map of Alzheimer's Disease-Signaling Pathways: A Hope for Drug Target Discovery Reviewed

    S. Ogishima, S. Mizuno, M. Kikuchi, A. Miyashita, R. Kuwano, H. Tanaka, J. Nakaya

    CLINICAL PHARMACOLOGY & THERAPEUTICS   93 ( 5 )   399 - 401   2013.5

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    Alzheimer's disease (AD) is a complex neurodegenerative condition, and its drug therapy is challenging. To inform AD drug discovery, we developed the "AlzPathway," a prototype of a comprehensive map of AD-related signaling pathways, from information obtained through studies in the public domain. The AlzPathway provides an integrated platform for systems analyses of AD-signaling pathways and networks.

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  • SORL1 is Genetically Associated with Neuropathologically Characterized Late-Onset Alzheimer's Disease Reviewed

    Yanan Wen, Akinori Miyashita, Nobutaka Kitamura, Tamao Tsukie, Yuko Saito, Hiroyuki Hatsuta, Shigeo Murayama, Akiyoshi Kakita, Hitoshi Takahashi, Hiroyasu Akatsu, Takayuki Yamamoto, Kenji Kosaka, Haruyasu Yamaguchi, Kohei Akazawa, Yasuo Ihara, Ryozo Kuwano

    JOURNAL OF ALZHEIMERS DISEASE   35 ( 2 )   387 - 394   2013

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    SORL1 was shown to be genetically associated with late-onset Alzheimer's disease (LOAD) in a large-scale genome-wide association study (GWAS) involving clinically verified subjects. Here, we attempted to replicate the association of SORL1 in Japanese neuropathologically characterized brain donor subjects (LOAD, 213; control, 370) through a single-nucleotide polymorphism (SNP)-based genetic study involving 19 SNPs: 11 SNPs were selected from the initial study reported by Rogaeva et al. (2007), and the other eight were from our GWAS. Among these SNPs, five exhibited a significant association with LOAD after multiple test correction (p &lt; 2.63E-03 [=0.05/19]), which was supported by means of multiple logistic regression analysis with adjustment for age, gender, and carrier status of the APOE epsilon 4 allele. Three of these SNPs (rs985421, rs12364988 [Rogaeva's SNP 7], and rs4598682) were encompassed by a 5' linkage disequilibrium (LD) region, and the remaining two (rs3781834 and rs3781836) by a 3' LD region. Strong LD among SNPs was observed within each LD region, implying that there are two genomic regions showing association with LOAD in SORL1. Case-control haplotype analysis demonstrated that some haplotypes are associated with LOAD in both LD regions. Our replication study strongly supports the preceding evidence that SORL1 is likely one of the genes associated with LOAD.

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  • SORL1 is genetically associated with late-onset Alzheimer's disease in Japanese, Koreans and Caucasians. Reviewed International journal

    Akinori Miyashita, Asako Koike, Gyungah Jun, Li-San Wang, Satoshi Takahashi, Etsuro Matsubara, Takeshi Kawarabayashi, Mikio Shoji, Naoki Tomita, Hiroyuki Arai, Takashi Asada, Yasuo Harigaya, Masaki Ikeda, Masakuni Amari, Haruo Hanyu, Susumu Higuchi, Takeshi Ikeuchi, Masatoyo Nishizawa, Masaichi Suga, Yasuhiro Kawase, Hiroyasu Akatsu, Kenji Kosaka, Takayuki Yamamoto, Masaki Imagawa, Tsuyoshi Hamaguchi, Masahito Yamada, Takashi Morihara, Masatoshi Takeda, Takeo Takao, Kenji Nakata, Yoshikatsu Fujisawa, Ken Sasaki, Ken Watanabe, Kenji Nakashima, Katsuya Urakami, Terumi Ooya, Mitsuo Takahashi, Takefumi Yuzuriha, Kayoko Serikawa, Seishi Yoshimoto, Ryuji Nakagawa, Jong-Won Kim, Chang-Seok Ki, Hong-Hee Won, Duk L Na, Sang Won Seo, Inhee Mook-Jung, Peter St George-Hyslop, Richard Mayeux, Jonathan L Haines, Margaret A Pericak-Vance, Makiko Yoshida, Nao Nishida, Katsushi Tokunaga, Ken Yamamoto, Shoji Tsuji, Ichiro Kanazawa, Yasuo Ihara, Gerard D Schellenberg, Lindsay A Farrer, Ryozo Kuwano

    PloS one   8 ( 4 )   e58618   2013

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    To discover susceptibility genes of late-onset Alzheimer's disease (LOAD), we conducted a 3-stage genome-wide association study (GWAS) using three populations: Japanese from the Japanese Genetic Consortium for Alzheimer Disease (JGSCAD), Koreans, and Caucasians from the Alzheimer Disease Genetic Consortium (ADGC). In Stage 1, we evaluated data for 5,877,918 genotyped and imputed SNPs in Japanese cases (n = 1,008) and controls (n = 1,016). Genome-wide significance was observed with 12 SNPs in the APOE region. Seven SNPs from other distinct regions with p-values <2×10(-5) were genotyped in a second Japanese sample (885 cases, 985 controls), and evidence of association was confirmed for one SORL1 SNP (rs3781834, P = 7.33×10(-7) in the combined sample). Subsequent analysis combining results for several SORL1 SNPs in the Japanese, Korean (339 cases, 1,129 controls) and Caucasians (11,840 AD cases, 10,931 controls) revealed genome wide significance with rs11218343 (P = 1.77×10(-9)) and rs3781834 (P = 1.04×10(-8)). SNPs in previously established AD loci in Caucasians showed strong evidence of association in Japanese including rs3851179 near PICALM (P = 1.71×10(-5)) and rs744373 near BIN1 (P = 1.39×10(-4)). The associated allele for each of these SNPs was the same as in Caucasians. These data demonstrate for the first time genome-wide significance of LOAD with SORL1 and confirm the role of other known loci for LOAD in Japanese. Our study highlights the importance of examining associations in multiple ethnic populations.

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  • Meta-analysis of genome-wide association studies for panic disorder in the Japanese population Reviewed

    T. Otowa, Y. Kawamura, N. Nishida, N. Sugaya, A. Koike, E. Yoshida, K. Inoue, S. Yasuda, Y. Nishimura, X. Liu, Y. Konishi, F. Nishimura, T. Shimada, H. Kuwabara, M. Tochigi, C. Kakiuchi, T. Umekage, T. Miyagawa, A. Miyashita, E. Shimizu, J. Akiyoshi, T. Someya, T. Kato, T. Yoshikawa, R. Kuwano, K. Kasai, N. Kato, H. Kaiya, K. Tokunaga, Y. Okazaki, H. Tanii, T. Sasaki

    TRANSLATIONAL PSYCHIATRY   2   e186   2012.11

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    Panic disorder (PD) is a moderately heritable anxiety disorder whose pathogenesis is not well understood. Due to the lack of power in previous association studies, genes that are truly associated with PD might not be detected. In this study, we conducted a genome-wide association study (GWAS) in two independent data sets using the Affymetrix Mapping 500K Array or Genome-Wide Human SNP Array 6.0. We obtained imputed genotypes for each GWAS and performed a meta-analysis of two GWAS data sets (718 cases and 1717 controls). For follow-up, 12 single-nucleotide polymorphisms (SNPs) were tested in 329 cases and 861 controls. Gene ontology enrichment and candidate gene analyses were conducted using the GWAS or meta-analysis results. We also applied the polygenic score analysis to our two GWAS samples to test the hypothesis of polygenic components contributing to PD. Although genome-wide significant SNPs were not detected in either of the GWAS nor the meta-analysis, suggestive associations were observed in several loci such as BDKRB2 (P = 1.3 x 10(-5), odds ratio = 1.31). Among previous candidate genes, supportive evidence for association of NPY5R with PD was obtained (gene-wise corrected P = 6.4 x 10(-4)). Polygenic scores calculated from weakly associated SNPs (P&lt;0.3 and 0.4) in the discovery sample were significantly associated with PD status in the target sample in both directions (sample I to sample II and vice versa) (P&lt;0.05). Our findings suggest that large sets of common variants of small effects collectively account for risk of PD.

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  • Alteration of POLDIP3 Splicing Associated with Loss of Function of TDP-43 in Tissues Affected with ALS Reviewed

    Atsushi Shiga, Tomohiko Ishihara, Akinori Miyashita, Misaki Kuwabara, Taisuke Kato, Norihiro Watanabe, Akie Yamahira, Chigusa Kondo, Akio Yokoseki, Masuhiro Takahashi, Ryozo Kuwano, Akiyoshi Kakita, Masatoyo Nishizawa, Hitoshi Takahashi, Osamu Onodera

    PLOS ONE   7 ( 8 )   e43120   2012.8

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    Amyotrophic lateral sclerosis (ALS) is an adult-onset neurodegenerative disease caused by selective loss of motor neurons. In the ALS motor neurons, TAR DNA-binding protein of 43 kDa (TDP-43) is dislocated from the nucleus to cytoplasm and forms inclusions, suggesting that loss of a nuclear function of TDP-43 may underlie the pathogenesis of ALS. TDP-43 functions in RNA metabolism include regulation of transcription, mRNA stability, and alternative splicing of pre-mRNA. However, a function of TDP-43 in tissue affected with ALS has not been elucidated. We sought to identify the molecular indicators reflecting on a TDP-43 function. Using exon array analysis, we observed a remarkable alteration of splicing in the polymerase delta interacting protein 3 (POLDIP3) as a result of the depletion of TDP-43 expression in two types of cultured cells. In the cells treated with TDP-43 siRNA, wild-type POLDIP3 (variant-1) decreased and POLDIP3 lacking exon 3 (variant-2) increased. The RNA binding ability of TDP-43 was necessary for inclusion of POLDIP3 exon 3. Moreover, we found an increment of POLDIP3 variant-2 mRNA in motor cortex, spinal cord and spinal motor neurons collected by laser capture microdissection with ALS. Our results suggest a loss of TDP-43 function in tissues affected with ALS, supporting the hypothesis that a loss of function of TDP-43 underlies the pathogenesis of ALS.

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  • AlzPathway: a comprehensive map of signaling pathways of Alzheimer's disease Reviewed

    Satoshi Mizuno, Risa Iijima, Soichi Ogishima, Masataka Kikuchi, Yukiko Matsuoka, Samik Ghosh, Tadashi Miyamoto, Akinori Miyashita, Ryozo Kuwano, Hiroshi Tanaka

    BMC SYSTEMS BIOLOGY   6   52   2012.5

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    Background: Alzheimer's disease (AD) is the most common cause of dementia among the elderly. To clarify pathogenesis of AD, thousands of reports have been accumulating. However, knowledge of signaling pathways in the field of AD has not been compiled as a database before.
    Description: Here, we have constructed a publicly available pathway map called "AlzPathway" that comprehensively catalogs signaling pathways in the field of AD. We have collected and manually curated over 100 review articles related to AD, and have built an AD pathway map using CellDesigner. AlzPathway is currently composed of 1347 molecules and 1070 reactions in neuron, brain blood barrier, presynaptic, postsynaptic, astrocyte, and microglial cells and their cellular localizations. AlzPathway is available as both the SBML (Systems Biology Markup Language) map for CellDesigner and the high resolution image map. AlzPathway is also available as a web service (online map) based on Payao system, a community-based, collaborative web service platform for pathway model curation, enabling continuous updates by AD researchers.
    Conclusions: AlzPathway is the first comprehensive map of intra, inter and extra cellular AD signaling pathways which can enable mechanistic deciphering of AD pathogenesis. The AlzPathway map is accessible at http://alzpathway.org/.

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  • [Apolipoprotein E gene]. Reviewed

    Kuwano R, Miyashita A

    Nihon rinsho. Japanese journal of clinical medicine   69 Suppl 8   93 - 97   2011.10

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  • [Genetic diagnosis and imaging genetics of Alzheimer's disease]. Reviewed

    Miyashita A, Kuwano R

    Nihon rinsho. Japanese journal of clinical medicine   69 Suppl 8   565 - 569   2011.10

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  • [Laboratory diagnosis and biomarkers of Alzheimer's disease]. Reviewed

    Kuwano R, Miyashita A, Tsukie T

    Nihon rinsho. Japanese journal of clinical medicine   69 Suppl 8   476 - 483   2011.10

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  • Evidence for a Common Founder and Clinical Characteristics of Japanese Families with the MAPT R406W Mutation. Reviewed International journal

    Takeshi Ikeuchi, Toru Imamura, Yasuhiro Kawase, Yoshimi Kitade, Miyuki Tsuchiya, Takayoshi Tokutake, Kensaku Kasuga, Ryuji Yajima, Tamao Tsukie, Akinori Miyashita, Morihiro Sugishita, Ryozo Kuwano, Masatoyo Nishizawa

    Dementia and geriatric cognitive disorders extra   1 ( 1 )   267 - 75   2011.1

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    BACKGROUND/AIM: Mutations in MAPT cause frontotemporal dementia with parkinsonism linked to chromosome 17 (FTDP-17). Patients with the MAPT R406W mutation were reported to show phenotypic heterogeneity in different ethnic backgrounds. We here report the clinical and genetic characteristics of Japanese families with the R406W mutation. METHODS: We examined the clinical and neuroimaging features of 6 patients from three families with the R406W mutation. We determined the genotypes of intragenic MAPT single-nucleotide polymorphisms (SNPs) and the flanking microsatellite markers to search for a common founder. RESULTS: The initial symptom was memory loss with the average age at onset being 54 years. Anterograde amnesia with episodic memory impairment was the predominant phenotype. Behavioral and personality changes or parkinsonism is not a prominent feature. A brain MRI study revealed marked atrophy of the medial temporal lobe. Genetic analysis of SNPs and microsatellite markers revealed that the affected members of the three families share common genotypes. CONCLUSION: The findings of the affected members in this study, which corroborate previously reported findings of European families, suggest that the R406W mutation may represent a phenotype of predominant anterograde amnesia in FTLD-17. Our genetic data suggest that a founder effect may account for some families with the R406W mutation.

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  • Neuroblastoma amplified sequence gene is associated with a novel short stature syndrome characterised by optic nerve atrophy and Pelger-Huet anomaly Reviewed

    Nadezda Maksimova, Kenju Hara, Irina Nikolaeva, Tan Chun-Feng, Tomoaki Usui, Mineo Takagi, Yasushi Nishihira, Akinori Miyashita, Hiroshi Fujiwara, Tokuhide Oyama, Anna Nogovicina, Aitalina Sukhomyasova, Svetlana Potapova, Ryozo Kuwano, Hitoshi Takahashi, Masatoyo Nishizawa, Osamu Onodera

    JOURNAL OF MEDICAL GENETICS   47 ( 8 )   538 - 548   2010.8

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    Background Hereditary short stature syndromes are clinically and genetically heterogeneous disorders and the cause have not been fully identified. Yakuts are a population isolated in Asia; they live in the far east of the Russian Federation and have a high prevalence of hereditary short stature syndrome including 3-M syndrome. A novel short stature syndrome in Yakuts is reported here, which is characterised by autosomal recessive inheritance, severe postnatal growth retardation, facial dysmorphism with senile face, small hands and feet, normal intelligence, Pelger-Huet anomaly of leucocytes, and optic atrophy with loss of visual acuity and colour vision. This new syndrome is designated as short stature with optic atrophy and Pelger-Huet anomaly (SOPH) syndrome.
    Aims To identify a causative gene for SOPH syndrome.
    Methods Genomewide homozygosity mapping was conducted in 33 patients in 30 families.
    Results The disease locus was mapped to the 1.1 Mb region on chromosome 2p24.3, including the neuroblastoma amplified sequence (NBAS) gene. Subsequently, 33 of 34 patients were identified with SOPH syndrome and had a 5741G/A nucleotide substitution (resulting in the amino acid substitution R1914H) in the NBAS gene in the homozygous state. None of the 203 normal Yakuts individuals had this substitution in the homozygous state. Immunohistochemical analysis revealed that the NBAS protein is well expressed in retinal ganglion cells, epidermal skin cells, and leucocyte cytoplasm in controls as well as a patient with SOPH syndrome.
    Conclusion These findings suggest that function of NBAS may associate with the pathogenesis of short stature syndrome as well as optic atrophy and Pelger-Huet anomaly.

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  • Sporadic four-repeat tauopathy with frontotemporal lobar degeneration, Parkinsonism, and motor neuron disease: a distinct clinicopathological and biochemical disease entity Reviewed

    Yong-Juan Fu, Yasushi Nishihira, Shigetoshi Kuroda, Yasuko Toyoshima, Tomohiko Ishihara, Makoto Shinozaki, Akinori Miyashita, Yue-Shan Piao, Chun-Feng Tan, Takashi Tani, Ryoko Koike, Keisuke Iwanaga, Mitsuhiro Tsujihata, Osamu Onodera, Ryozo Kuwano, Masatoyo Nishizawa, Akiyoshi Kakita, Takeshi Ikeuchi, Hitoshi Takahashi

    ACTA NEUROPATHOLOGICA   120 ( 1 )   21 - 32   2010.7

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    Tau is the pathological protein in several neurodegenerative disorders classified as frontotemporal lobar degeneration (FTLD), including corticobasal degeneration (CBD) and progressive supranuclear palsy (PSP). We report an unusual tauopathy in three Japanese patients presenting with Parkinsonism and motor neuron disease (neuroimaging revealed frontotemporal cerebral atrophy in two patients who were examined). At autopsy, all cases showed FTLD with the most severe neuronal loss and gliosis evident in the premotor and precentral gyri. Although less severe, such changes were also observed in other brain regions, including the basal ganglia and substantia nigra. In the spinal cord, loss of anterior horn cells and degeneration of the corticospinal tract were evident. In addition, the affected regions exhibited neuronal cytoplasmic inclusions resembling neurofibrillary tangles. Immunostaining using antibodies against hyperphosphorylated tau and 4-repeat tau revealed widespread occurrence of neuronal and glial cytoplasmic inclusions in the central nervous system; the astrocytic tau lesions were unique, and different in morphology from astrocytic plaques in CBD, or tufted astrocytes in PSP. However, immunoblotting of frozen brain samples available in two cases revealed predominantly 4R tau, with the approximately 37-kDa and 33-kDa low-molecular mass tau fragments characteristic of CBD and PSP, respectively. No mutations were found in the tau gene in either of the two cases. Based on these clinicopathological, biochemical, and genetic findings, we consider that the present three patients form a distinct 4R tauopathy associated with sporadic FTLD.

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  • Neuropathological Asymmetry in Argyrophilic Grain Disease Reviewed

    Tadashi Adachi, Yuko Saito, Hiroyuki Hatsuta, Sayaka Funabe, Aya M. Tokumaru, Kenji Ishii, Tomio Arai, Motoji Sawabe, Kazutomi Kanemaru, Akinori Miyashita, Ryozo Kuwano, Kenji Nakashima, Shigeo Murayama

    JOURNAL OF NEUROPATHOLOGY AND EXPERIMENTAL NEUROLOGY   69 ( 7 )   737 - 744   2010.7

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    The presence of argyrophilic grains in the neuropil is associated with a form of dementia. We investigated morphological asymmetry in 653 consecutive autopsy patients from a general geriatric hospital (age [mean +/- SD] = 81.1 T 8.9 years), focusing on those from patients with advanced argyrophilic grain disease. Paraffin sections of the bilateral posterior hippocampi were immunostained with antiYphosphorylated tau and antiY4-repeat tau antibodies and by the Gallyas-Braak method. In a side-to-side comparison, asymmetry was defined when either the extent or the density of argyrophilic grains was different. Of the 653 subjects, 65 (10%) had Stage 3 argyrophilic grain disease, and 59 (90.8%) showed histopathological asymmetry. Antemortem computed tomographic images (n = 24), magnetic resonance imaging scans (n = 8), and combined computed tomographic and magnetic resonance images (n = 15) were available; images from 20 of the 47 subjects showed asymmetry that correlated with the histopathological asymmetry. Cerebral cortical asymmetry consistent with the histopathology was also visible in N-isopropyl-123I-piodoamphetamine single photon emission computed tomographic images from 6 patients and 18 F-labeled fluorodeoxyglucose positron emission tomographic images from 2 patients. Thus, asymmetric involvement of the medial temporal lobe in patients with advanced argyrophilic grain disease may represent a diagnostic feature and contribute to distinguishing dementia with grains from Alzheimer disease.

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  • TRPM7 Is Not Associated With Amyotrophic Lateral Sclerosis-Parkinsonism Dementia Complex in the Kii Peninsula of Japan Reviewed

    Kenju Hara, Yasumasa Kokubo, Hiroyuki Ishiura, Yuko Fukuda, Akinori Miyashita, Ryozo Kuwano, Ryogen Sasaki, Jun Goto, Masatoyo Nishizawa, Shigeki Kuzuhara, Shoji Tsuji

    AMERICAN JOURNAL OF MEDICAL GENETICS PART B-NEUROPSYCHIATRIC GENETICS   153B ( 1 )   310 - 313   2010.1

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    Amyotrophic lateral sclerosis-parkinsonism dementia complex (ALS/PDC) is a distinct neurodegenerative disorder characterized by ALS pathology with neurofibrillary tangles (NFTs) in the spinal cord and brain. Recent clinical studies have revealed a high incidence and a high familial occurrence of ALS/PDC in both Guam and the Kii peninsula of Japan, suggesting a strong genetic predisposition to this disorder. The T1482I variant (rs8042919) of TRPM7 gene which is suggested to play roles in regulating the cellular homeostasis of Ca(2+), Mg(2+), and trace metals, has recently been reported to be associated with Guamanian patients with ALS/PDC. To investigate whether TRPM7 is associated with Kii ALS/PDC, we conducted parametric linkage analyses of the TRPM7 locus in a large extended family with ALS/PDC. Linkage analysis did not reveal any evidence supporting the linkage to the TRPM7 locus. Resequencing of the entire coding region of TRPM7 did not reveal any pathogenic mutations in an affected individual in this family. The allele frequencies of the T1482I in affected individuals in this family or in those from other families are not significantly different from those in regional controls or those in HapMap-JPT samples. These results indicate that TRPM7 is not associated with ALS/PDC in the Kii peninsula of Japan. (C) 2009 Wiley-Liss, Inc.

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  • Genetic Deficiency of Plasma Lipoprotein-Associated Phospholipase A(2) (PLA2G7 V297F Null Mutation) and Risk of Alzheimer&apos;s Disease in Japan Reviewed

    Beena Koshy, Akinori Miyashita, Pamela St Jean, Heide Stirnadel, Toshihiko Kaise, Justin P. Rubio, Vincent Mooser, Ryozo Kuwano, Michael C. Irizarry

    JOURNAL OF ALZHEIMERS DISEASE   21 ( 3 )   775 - 780   2010

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    High plasma lipoprotein phospholipase A(2) activity (Lp-PLA(2)) is reported to be a risk factor for dementia. A loss of function polymorphism in the Lp-PLA(2) gene - PLA2G7 V279F - is found almost exclusively in Asians. In 1,952 subjects with late-onset AD and 2,079 non-demented controls recruited from Japan, the PLA2G7 null allele was not associated with risk or age at onset of AD: logistic regression OR 0.98 (95% CI 0.86-1.12, p = 0.81) per additional null allele, adjusted for age/age at onset, gender, and APOE epsilon 4. Genetic deficiency of Lp-PLA(2) activity is not associated with a reduced risk of AD in the Japanese population.

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  • Identification of independent APP locus duplication in Japanese patients with early-onset Alzheimer disease Reviewed

    K. Kasuga, T. Shimohata, A. Nishimura, A. Shiga, T. Mizuguchi, J. Tokunaga, T. Ohno, A. Miyashita, R. Kuwano, N. Matsumoto, O. Onodera, M. Nishizawa, T. Ikeuchi

    JOURNAL OF NEUROLOGY NEUROSURGERY AND PSYCHIATRY   80 ( 9 )   1050 - 1052   2009.9

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    Background: The occurrence of duplications of the amyloid precursor protein gene (APP) has been described in European families with early-onset familial Alzheimer disease (EO-FAD) and cerebral amyloid angiopathy. However, the contribution of APP duplication to the development of AD in other ethnic populations remains undetermined.
    Methods: The occurrence of APP duplication in probands from 25 families with FAD and 11 sporadic EO-AD cases in the Japanese population was examined by quantitative PCR and microarray-based comparative genomic hybridisation analyses. APP expression level was determined by real-time quantitative reverse-transcription (RT) PCR analysis using mRNA extracted from the peripheral blood of the patients.
    Results: We identified APP locus duplications in two unrelated EO-FAD families. The duplicated genomic regions in two patients of these families differed from each other. No APP duplication was found in the late-onset FAD families or sporadic EO-AD patients. The patients with APP duplication developed insidious memory disturbance in their fifties without intracerebral haemorrhage and epilepsy. Quantitative RT-PCR analysis showed the increased APP mRNA expression levels in these patients compared with those in age- and sex-matched controls.
    Conclusions: Our results suggest that APP duplication should be considered in patients with EO-FAD in various ethnic groups, and that increased APP mRNA expression level owing to APP duplication contributes to AD development.

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  • Depression and psychiatric symptoms preceding onset of dementia in a family with early-onset Alzheimer disease with a novel PSEN1 mutation Reviewed

    Kensaku Kasuga, Tsukasa Ohno, Tomohiko Ishihara, Akinori Miyashita, Ryozo Kuwano, Osamu Onodera, Masatoyo Nishizawa, Takeshi Ikeuchi

    JOURNAL OF NEUROLOGY   256 ( 8 )   1351 - 1353   2009.8

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  • [Genetic basis for dementia]. Reviewed

    Kuwano R, Takei N, Miyashita A

    Nihon rinsho. Japanese journal of clinical medicine   67 ( 6 )   1078 - 1082   2009.6

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    A goal of genetic research is to identify risk factor loci for complex disorders, and to understand a molecular mechanism of the factor on development of the disease. Dementia is the most common neurodegererative disorder in the elderly. Three frequent neurodegererative dementias are Alzheimer disease, dementia with Lewy bodies, and frontotemporal lobar degeneration, characterized by senile plaque with amyloid beta and neurofibrillary tangles with tau, Lewy body with alpha-synuclein, tau or tau-negative ubiquitin-immunoreactive neuronal inclusions with TDP-43, respectively. Overlapping symptoms, progress and neuropathological findings often complicate the diagnosis. Genetic risk factors obtained by genome-wide association study might provide new insight into etiology common to dementia.

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  • GAB2 is not associated with late-onset Alzheimer&apos;s disease in Japanese Reviewed

    Akinori Miyashita, Hiroyuki Arai, Takashi Asada, Masaki Imagawa, Mikio Shoji, Susumu Higuchi, Katsuya Urakami, Shinichi Toyabe, Kohei Akazawa, Ichiro Kanazawa, Yasuo Ihara, Ryozo Kuwano

    EUROPEAN JOURNAL OF HUMAN GENETICS   17 ( 5 )   682 - 686   2009.5

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    The epsilon 4 allele of the apolipoprotein E gene (APOE) is unequivocally recognized as a genetic risk factor for late-onset Alzheimer&apos;s disease (LOAD). Recently, single-nucleotide polymorphisms (SNPs) of the GRB2-associated binding protein 2 gene (GAB2) were shown to be associated with LOAD in Caucasians carrying the APOE-epsilon 4 allele through a genome-wide association study. Here, we attempted to replicate the finding by genotyping these SNPs in a large clinical cohort of Japanese. We observed no association of any of the SNPs with LOAD. GAB2 may not be a disease susceptibility gene for LOAD in Japanese.

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  • Genetic association study on in and around the APOE in late-onset Alzheimer disease in Japanese Reviewed

    Norihiro Takei, Akinori Miyashita, Tarriao Tsukie, Hiroyuki Arai, Takashi Asada, Masaki Imagawa, Mikio Shoji, Susumu Higuchi, Katsuya Urakami, Hideo Kimura, Akiyoshi Kakita, Hitoshi Takahashi, Shoji Tsuji, Ichiro Kanazawa, Yasuo Ihara, Shoji Odani, Ryozo Kuwano

    GENOMICS   93 ( 5 )   441 - 448   2009.5

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  • Association of HTRA1 Mutations and Familial Ischemic Cerebral Small-Vessel Disease Reviewed

    Kenju Hara, Atsushi Shiga, Toshio Fukutake, Hiroaki Nozaki, Akinori Miyashita, Akio Yokoseki, Hirotoshi Kawata, Akihide Koyama, Kunimasa Arima, Toshiaki Takahashi, Mari Ikeda, Hiroshi Shiota, Masato Tamura, Yutaka Shimoe, Mikio Hirayama, Takayo Arisato, Sohei Yanagawa, Akira Tanaka, Imaharu Nakano, Shu-ichi Ikeda, Yutaka Yoshida, Tadashi Yamamoto, Takeshi Ikeuchi, Ryozo Kuwano, Masatoyo Nishizawa, Shoji Tsuji, Osamu Onodera

    NEW ENGLAND JOURNAL OF MEDICINE   360 ( 17 )   1729 - 1739   2009.4

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    BACKGROUND
    The genetic cause of cerebral autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy (CARASIL), which is characterized by ischemic, non-hypertensive, cerebral small-vessel disease with associated alopecia and spondylosis, is unclear.
    METHODS
    In five families with CARASIL, we carried out linkage analysis, fine mapping of the region implicated in the disease, and sequence analysis of a candidate gene. We also conducted functional analysis of wild-type and mutant gene products and measured the signaling by members of the transforming growth factor beta (TGF-beta) family and gene and protein expression in the small arteries in the cerebrum of two patients with CARASIL.
    RESULTS
    We found linkage of the disease to the 2.4-Mb region on chromosome 10q, which contains the HtrA serine protease 1 (HTRA1) gene. HTRA1 is a serine protease that represses signaling by TGF-beta family members. Sequence analysis revealed two nonsense mutations and two missense mutations in HTRA1. The missense mutations and one of the nonsense mutations resulted in protein products that had comparatively low levels of protease activity and did not repress signaling by the TGF-beta family. The other nonsense mutation resulted in the loss of HTRA1 protein by nonsense-mediated decay of messenger RNA. Immunohistochemical analysis of the cerebral small arteries in affected persons showed increased expression of the extra domain-A region of fibronectin and versican in the thickened tunica intima and of TGF-beta 1 in the tunica media.
    CONCLUSIONS
    CARASIL is associated with mutations in the HTRA1 gene. Our findings indicate a link between repressed inhibition of signaling by the TGF-beta family and ischemic cerebral small-vessel disease, alopecia, and spondylosis.

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  • SNP HiTLink: a high-throughput linkage analysis system employing dense SNP data Reviewed

    Yoko Fukuda, Yasuo Nakahara, Hidetoshi Date, Yuji Takahashi, Jun Goto, Akinori Miyashita, Ryozo Kuwano, Hiroki Adachi, Eiji Nakamura, Shoji Tsuji

    BMC BIOINFORMATICS   10   121   2009.4

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    Background: During this recent decade, microarray-based single nucleotide polymorphism (SNP) data are becoming more widely used as markers for linkage analysis in the identification of loci for disease-associated genes. Although microarray-based SNP analyses have markedly reduced genotyping time and cost compared with microsatellite-based analyses, applying these enormous data to linkage analysis programs is a time-consuming step, thus, necessitating a high-throughput platform.
    Results: We have developed SNP HiTLink (SNP High Throughput Linkage analysis system). In this system, SNP chip data of the Affymetrix Mapping 100 k/500 k array set and Genome-Wide Human SNP array 5.0/6.0 can be directly imported and passed to parametric or model-free linkage analysis programs; MLINK, Superlink, Merlin and Allegro. Various marker-selecting functions are implemented to avoid the effect of typing-error data, markers in linkage equilibrium or to select informative data.
    Conclusion: The results using the 100 k SNP dataset were comparable or even superior to those obtained from analyses using microsatellite markers in terms of LOD scores obtained. General personal computers are sufficient to execute the process, as runtime for whole-genome analysis was less than a few hours. This system can be widely applied to linkage analysis using microarray-based SNP data and with which one can expect high-throughput and reliable linkage analysis.

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  • Programs for calculating the statistical powers of detecting susceptibility genes in case-control studies based on multistage designs Reviewed

    Nobutaka Kitamura, Kouhei Akazawa, Akinori Miyashita, Ryozo Kuwano, Shin-ichi Toyabe, Junichiro Nakamura, Norihito Nakamura, Tatsuhiko Sato, M. Aminul Hoque

    BIOINFORMATICS   25 ( 2 )   272 - 273   2009.1

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    Motivation: A two-stage association study is the most commonly used method among multistage designs to efficiently identify disease susceptibility genes. Recently, some SNP studies have utilized more than two stages to detect disease genes. However, there are few available programs for calculating statistical powers and positive predictive values (PPVs) of arbitrary n-stage designs.
    Results: We developed programs for a multistage case-control association study using R language. In our programs, input parameters include numbers of samples and candidate loci, genome-wide false positive rate and proportions of samples and loci to be selected at the k-th stage (k = 1,..., n). The programs output statistical powers, PPVs and numbers of typings in arbitrary n-stage designs. The programs can contribute to prior simulations under various conditions in planning a genome-wide association study.

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  • Sample-size properties of a case-control association analysis of multistage SNP studies for identifying disease susceptibility genes Reviewed

    Nobutaka Kitamura, Kouhei Akazawa, Shin-ichi Toyabe, Akinori Miyashita, Ryozo Kuwano, Junichiro Nakamura

    JOURNAL OF HUMAN GENETICS   53 ( 5 )   390 - 400   2008.5

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    A two-stage association study is the most commonly used method to efficiently identify disease susceptibility genes. However, some recent single nucleotide polymorphism (SNP) studies recently utilized three-stage designs. The purpose of this study was to investigate the practical properties of statistical powers and positive predictive values (PPVs) of replication-based analysis (RBA) and the joint analysis (JA) in multistage designs. For this purpose, a program for multistage designs was developed to calculate these performance indicators under various conditions of the number of samples, alleles of candidates, alleles remaining in the final stage, and genotypings. The results showed that the powers and PPVs of RBA and JA in three-stage designs were higher than those in two-stage designs in the range of a smaller proportion of sample size than 0.5 at the first stage. This tendency was more remarkable in JA. In conclusion, researchers who perform SNP studies for identifying disease susceptibility genes need to take account of three-stage case-control association studies, corresponding to study conditions such as the total numbers of samples, alleles, and genotypings. Furthermore, the program developed in this study is useful for estimating powers and PPVs in planning multistage association studies.

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  • Prediction of Disease-associated Single Nucleotide Polymorphisms Using Virtual Genomes Constructed from a Public Haplotype Database Reviewed

    S. Toyabe, A. Miyashita, N. Kitamura, R. Kuwano, K. Akazowa

    METHODS OF INFORMATION IN MEDICINE   47 ( 6 )   522 - 528   2008

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    Objectives: Simultaneous dealing of hundreds of thousands of single nucleotide polymorphisms (SNPs) in genome-wide association studies is laborious. The aim of our study is to develop a method to decrease the number of candidate SNPs prior to the genotyping of study subjects.
    Methods. We created virtual genotype data on case and control subjects from data of the International HapMap Project by using haplotype-based simulation method. We repeated virtual case-control association studies and selected candidate SNPs. We applied the selected SNPs to previously published genetic case-control studies. Sensitivity to detect association with causative genes using our method was compared to the original studies and results using tag SNPs.
    Results. We found a discrete distribution pattern of SNPs, which was able to produce significant results in case-control association studies. The number of candidate SNPs that we selected was 24.7% of the number of the original set of SNPs, We applied this method to previously published genetic case-control studies and found that the use of candidate SNPs improved the sensitivity for detecting significant alleles, both compared to the original studies and to the use of tag SNPs. The results were not affected by the difference of the diseases and genes involved.
    Conclusions. Our simulation-based approach has advantages of reducing costs and improving performance to detect significant alleles. This method can be used without considering the specific disease and genes involved.

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  • Mutational analysis in early-onset familial dementia in the Japanese population Reviewed

    Takeshi Ikeuchi, Hiroyuki Kaneko, Akinori Miyashita, Hiroaki Nozaki, Kensaku Kasuga, Tamao Tsukie, Miyuki Tsuchiya, Toru Imamura, Hideki Ishizu, Kenju Aoki, Atsushi Ishikawa, Osamu Onodera, Ryozo Kuwano, Masatoyo Nishizawa

    DEMENTIA AND GERIATRIC COGNITIVE DISORDERS   26 ( 1 )   43 - 49   2008

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    Background: Three major causative genes have been implicated as the cause of early-onset familial Alzheimer's disease (AD): the amyloid precursor protein gene (APP), presenilin-1 (PSEN1) and PSEN2. Although rare, a tau-related dementia with mutations in the microtubule-associated protein tau gene (MAPT) has been identified in patients showing clinical presentations similar to those of AD. Methods: We performed mutational analysis of APP, PSEN1, PSEN2, and MAPT in 10 Japanese families with early-onset dementia clinically diagnosed as probable Alzheimer's disease. Results: In 4 index patients, we identified 4 missense PSEN1 mutations, namely, L286V, G378E, L381V, and L392V. The mean age at onset in the patients with PSEN1 mutations was 39 years. In 2 families, we found the R406W mutation in MAPT. The mean age at onset of the patients carrying the R406W mutation was 52 years, and they presented with the peculiar AD-like phenotype without apparent behavioral or language problems. Conclusion: These observations suggest that although PSEN1 mutations are the most frequent cause, the MAPT R406W mutation is an important cause of early-onset familial dementia clinically diagnosed as AD. Differentiation of patients with the MAPT mutation from AD patients by genetic testing would be meaningful, considering that a different therapeutic approach should be applied. Copyright (c) 2008 S. Karger AG, Basel.

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  • Genetic association of CTNNA3 with late-onset Alzheimer's disease in females. Reviewed International journal

    Akinori Miyashita, Hiroyuki Arai, Takashi Asada, Masaki Imagawa, Etsuro Matsubara, Mikio Shoji, Susumu Higuchi, Katsuya Urakami, Akiyoshi Kakita, Hitoshi Takahashi, Shinichi Toyabe, Kohei Akazawa, Ichiro Kanazawa, Yasuo Ihara, Ryozo Kuwano

    Human molecular genetics   16 ( 23 )   2854 - 69   2007.12

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    Alzheimer's disease (AD), the most common form of dementia in the elderly, was found to exhibit a trend toward a higher risk in females than in males through epidemiological studies. Therefore, we hypothesized that gender-related genetic risks could exist. To reveal the ones for late-onset AD (LOAD), we extended our previous genetic work on chromosome 10q (genomic region, 60-107 Mb), and single nucleotide polymorphism (SNP)-based genetic association analyses were performed on the same chromosomal region, where the existence of genetic risk factors for plasma Abeta42 elevation in LOAD was implied on a linkage analysis. Two-step screening of 1140 SNPs was carried out using a total of 1408 subjects with the APOE-epsilon3*3 genotype: we first genotyped an exploratory sample set (LOAD, 363; control, 337), and then genotyped some associated SNPs in a validation sample set (LOAD, 336; control, 372). Seven SNPs, spanning about 38 kb, in intron 9 of CTNNA3 were found to show multiple-hit association with LOAD in females, and exhibited more significant association on Mantel-Haenszel test (allelic P-values(MH-F) = 0.000005945-0.0007658). Multiple logistic regression analysis of a total of 2762 subjects (LOAD, 1313; controls, 1449) demonstrated that one of the seven SNPs directly interacted with the female gender, but not with the male gender. Furthermore, we found that this SNP exhibited no interaction with the APOE-epsilon4 allele. Our data suggest that CTNNA3 may affect LOAD through a female-specific mechanism independent of the APOE-epsilon4 allele.

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  • Enhanced accumulation of phosphorylated alpha-synuclein and elevated beta-amyloid 42/40 ratio caused by expression of the presenilin-1 Delta T440 mutant associated with familial Lewy body disease and variant Alzheimer's disease Reviewed

    Hiroyuki Kaneko, Akiyoshi Kakita, Kensaku Kasuga, Hiroaki Nozaki, Atsushi Ishikawa, Akinori Miyashita, Ryozo Kuwano, Genta Ito, Takeshi Iwatsubo, Hitoshi Takahashi, Masatoyo Nishizawa, Osamu Onodera, Sangram S. Sisodia, Takeshi Ikeuchi

    JOURNAL OF NEUROSCIENCE   27 ( 48 )   13092 - 13097   2007.11

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    Mutations in the PSEN1 gene encoding presenilin 1 ( PS1) are linked to a vast majority of pedigrees with early- onset, autosomal dominant forms of familial Alzheimer's disease ( FAD). Lewy body ( LB) pathology is frequently found in the brains of FAD patients harboring PSEN1 mutations. We recently reported on a novel PS1 mutation with the deletion of threonine at codon 440 (Delta T440) in a familial case diagnosed as having the neocortical type of dementia with LBs ( DLB) and variant AD. In this report, we investigated the possible involvement of PS1 Delta T440 mutation in aberrant alpha-synuclein accumulation. We established cell lines that stably express either wild- type ( WT) PS1 or the FAD- linked PS1 H163R, E280A, Delta E9, and PS1 Delta T440 mutants and now demonstrate that the expression of the PS1 Delta T440 mutant led to a marked elevation in the ratio of beta-amyloid (A beta) 42/40 peptides in a conditioned medium. More importantly, we report here that the levels of phosphorylated alpha-synuclein increase in neuronal and non- neuronal cells expressing the PS1 Delta T440 mutant compared with cells that express WT PS1 or the PS1 H163R and E280A variants that are not associated with LB pathology. This finding is consistent with our demonstration of elevated levels of phosphorylated alpha-synuclein in the detergent-resistant fraction prepared from a patient's brain with PS1 Delta T440 mutation. These observations raise the intriguing suggestion that the mechanism( s) by which the PS1 Delta T440 mutant causes DLB and variant AD are by enhancing the phosphorylation of alpha-synuclein and the ratio of A beta(42/40) peptides, respectively, in the brain.

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  • [Molecular genetic analysis of amyotrophic lateral sclerosis/parkinsonism-dementia complex (ALS/PDC) in the Kii peninsula]. Reviewed

    Hara K, Kuwano R, Miyashita A, Kokubo Y, Sasaki R, Nakahara Y, Goto J, Nishizawa M, Kuzuhara S, Tsuji S

    Rinsho shinkeigaku = Clinical neurology   47 ( 11 )   974 - 976   2007.11

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    Recent clinical research have revealed that more than 70% of the patients with ALS/PDC, which is highly prevalent in Hohara area in the Kii peninsula, have family history. 80% of Guamanian patients, who have identical pathological findings to those of ALS/PDC in Kii, are also known to have family history with non-Mendelian trait. These facts suggest strong genetic predisposition to ALS/PDC in both Kii and Guam. However, no genes associated with ALS/PDC have been identified by molecular genetic studies using candidate gene approach. To identify the causative or susceptibility genes for ALS/PDC, we have conducted a genomewide linkage analysis for five families with ALS/PDC in Hohara. The fact that affected individuals were ascertained in successive generations suggest an autosomal dominant (AD) inheritance, while the presence of consanguinity suggests an autosomal recessive (AR) inheritance. Although we can raise possibilities of AD model with incomplete penetrance or AR model with high gene frequency (pseudo-dominant model), the mode of inheritance of ALS/PDC families is complicated and controversial. Therefore, we are also conducting model-free (non-parametric) linkage analysis to identify the disease locus without setting mode of inheritance. More family members and detailed clinical evaluations are required to obtain the convincing evidence of linkage.

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  • Novel locus for benign hereditary chorea with adult onset maps to chromosome 8q21.3 q23.3. Reviewed

    Shimohata Takayoshi, Hara Kenju, Sanpei Kazuhiro, Nunomura Jin-ichi, Maeda Tetsuya, Kawachi Izumi, Kanazawa Masato, Kasuga Kensaku, Miyashita Akinori, Kuwano Ryozo, Hirota Koichi, Tsuji Shoji, Onodera Osamu, Nishizawa Masatoyo, Honma Yoshiaki

    Brain   130 ( Pt 9 )   2302 - 2309   2007.9

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    Autosomal dominant choreas are genetically heterogeneous disorders including Huntington disease (HD), Huntington disease like 1 (HDL1), Huntington disease like 2 (HDL2), dentatorubro-pallidoluysian atrophy (DRPLA), spinocerebellar ataxia type 17 (SCA17) and benign hereditary chorea (BHC). We identified two Japanese families with adult-onset benign chorea without dementia inherited in an autosomal dominant pattern. All affected individuals presented slowly progressive choreic movements in their upper and lower extremities, trunk and head with an age of onset ranging from 40 to 66 (average 54.3), which were markedly improved by haloperidol. The affected individuals also developed reduced muscle tones in their extremities. The findings obtained in the brain CT or MRI studies of nine affected individuals were normal. These clinical features resemble those of the so-called &#039;senile chorea&#039;. HD, HDL1, HDL2, DRPLA, SCA17 and BHC caused by mutations in the TITF-1 gene were excluded by mutational and linkage analyses. A genome-wide linkage analysis revealed linkage to chromosome 8q21.3-q23.3 with a maximum cumulative two-point log of the odds (LOD) score of 4.74 at D8S1784 (theta = 0.00). H

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  • Novel locus for benign hereditary chorea with adult onset maps to chromosome 8q21.3 q23.3. Reviewed International journal

    Takayoshi Shimohata, Kenju Hara, Kazuhiro Sanpei, Jin-ichi Nunomura, Tetsuya Maeda, Izumi Kawachi, Masato Kanazawa, Kensaku Kasuga, Akinori Miyashita, Ryozo Kuwano, Koichi Hirota, Shoji Tsuji, Osamu Onodera, Masatoyo Nishizawa, Yoshiaki Honma

    Brain : a journal of neurology   130 ( Pt 9 )   2302 - 9   2007.9

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    Autosomal dominant choreas are genetically heterogeneous disorders including Huntington disease (HD), Huntington disease like 1 (HDL1), Huntington disease like 2 (HDL2), dentatorubro-pallidoluysian atrophy (DRPLA), spinocerebellar ataxia type 17 (SCA17) and benign hereditary chorea (BHC). We identified two Japanese families with adult-onset benign chorea without dementia inherited in an autosomal dominant pattern. All affected individuals presented slowly progressive choreic movements in their upper and lower extremities, trunk and head with an age of onset ranging from 40 to 66 (average 54.3), which were markedly improved by haloperidol. The affected individuals also developed reduced muscle tones in their extremities. The findings obtained in the brain CT or MRI studies of nine affected individuals were normal. These clinical features resemble those of the so-called 'senile chorea'. HD, HDL1, HDL2, DRPLA, SCA17 and BHC caused by mutations in the TITF-1 gene were excluded by mutational and linkage analyses. A genome-wide linkage analysis revealed linkage to chromosome 8q21.3-q23.3 with a maximum cumulative two-point log of the odds (LOD) score of 4.74 at D8S1784 (theta = 0.00). Haplotype analysis of both the families defined the candidate region as 21.5 Mb interval flanked by M9267 and D8S1139. We named this adult-onset dominant inherited chorea 'benign hereditary chorea type 2 (BHC2)'.

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  • New locus for benign hereditary chorea with adult-onset maps to chromosome 8q22.2-q23.3 Reviewed

    Kenju Hara, Takayoshi Shimohata, Sanpei Kazuhiro, Jin-ichi Nunomura, Izumi Kawachi, Masato Kanazawa, Kensaku Kasuga, Akinori Miyashita, Ryozo Kuwano, Koichi Hirota, Shoji Tsuji, Osamu Onodera, Masatoyo Nishizawa, Yoshiaki Honma

    NEUROLOGY   68 ( 12 )   A326 - A327   2007.3

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  • Dynamin-binding protein gene on chromosome 10q is associated with late-onset Alzheimer's disease Reviewed

    R Kuwano, A Miyashita, H Arai, T Asada, M Imagawa, M Shoji, S Higuchi, K Urakami, A Kakita, H Takahashi, T Tsukie, S Toyabe, K Akazawa, Kanazawa, I, Y Ihara

    HUMAN MOLECULAR GENETICS   15 ( 13 )   2170 - 2182   2006.7

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    The apolipoprotein E (APOE) gene has been consistently shown to be a major genetic risk factor; however, all cases of Alzheimer's disease (AD) cannot be attributed to the epsilon 4 variant of APOE, because about half of AD patients have the APOE-epsilon 3*3 genotype. To identify an additional genetic risk factor(s), we performed large-scale single nucleotide polymorphism (SNP)-based association analysis of 1526 late-onset AD patients and 1666 control subjects in a Japanese population. We prepared two independent sets consisting of exploratory and validation samples, respectively, with only the APOE-epsilon 3*3 genotype, and first carried out genotyping for the exploratory set with 1206 SNPs in the region between 60 and 107 Mb on chromosome 10q that is implicated by linkage studies as containing an AD susceptibility locus. Thirty-five SNPs that showed significant values (P &lt; 0.01) were followed-up to detect any association with the validation samples. Finally, six SNPs exhibited replicated significant associations (P=0.000035-0.00048) on meta-analysis of both sets. These SNPs were clustered in a locus spanning 220 kb at genomic position 101 Mb, and three of the six SNPs were located in the dynamin-binding protein (DNMBP) gene. Quantitative real-time RT-PCR analysis demonstrated that neuropathologically confirmed AD brains exhibit a significant reduction of DNMBP mRNA compared with age-matched ones (P &lt; 0.0169). Thus, we confirmed the association of DNMBP with AD individuals with the APOE-epsilon 3*3 genotype or lacking the epsilon 4 allele, and DNMBP may be one of the susceptibility genes for AD.

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  • [Molecular genetics of Alzheimer's disease]. Reviewed

    Akinori M, Ryozo K

    Tanpakushitsu kakusan koso. Protein, nucleic acid, enzyme   50 ( 16 Suppl )   2122 - 2127   2005.12

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  • A mutant PSEN1 causes dementia with Lewy bodies and variant Alzheimer's disease Reviewed

    A Ishikawa, YS Piao, A Miyashita, R Kuwano, O Onodera, H Ohtake, M Suzuki, M Nishizawa, H Takahashi

    ANNALS OF NEUROLOGY   57 ( 3 )   429 - 434   2005.3

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    We report early-onset parkinsonism and dementia of 18 years' duration in a 52-year-old man whose grandfather and father had suffered from a similar neurological disease. In this patient, we found neuronal loss in various brain regions including the substantia nigra and cerebral cortex, Lewy bodies, cotton wool plaques, corticospinal tract degeneration, cerebral amyloid angiopathy, and a novel three-base pair deletion in exon 12 of the presenilin-1 (PSEN1) gene. We considered that the mutant PSEN1 might play an important role in the pathogenetic process of both aggregation of a-synuclein into Lewy bodies and deposition of beta-amyloid into cotton wool plaques.

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  • A rare case of hypohidrotic ectodermal dysplasia caused by compound heterozygous mutations in the EDAR gene Reviewed

    Y Shimomura, N Sato, A Miyashita, T Hashimoto, M Ito, R Kuwano

    JOURNAL OF INVESTIGATIVE DERMATOLOGY   123 ( 4 )   649 - 655   2004.10

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    Hypohidrotic ectodermal dysplasia (HED) is a genetic disease characterized by abnormal hair, teeth, and sweat gland development. Although most cases of HED display X-linked recessive inheritance, autosomal dominant and autosomal recessive forms also exist. X-linked HED is caused by mutations in the EDA gene, and the autosomal forms result from mutations in either the EDAR gene or the EDARADD gene. In this study, we identified compound heterozygous mutations in the EDAR gene in a Japanese female patient with HED. On the maternal allele is a novel splice donor site mutation of intron 2 leading to the generation of unstable transcripts with exon 2 skipping; on the paternal allele is a novel R375H transition within the death domain of EDAR. Using expression studies in tissue culture cells, we found that the R375H substitution in EDAR caused loss of its affinity for EDARADD and reduced activation of the downstream target NF-kappaB. Our findings indicate that both alleles of EDAR are non-functional in our patient, resulting in the HED phenotype.

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  • Japanese SCA families with an unusual phenotype linked to a locus overlapping with SCA15 locus

    K Hara, T Fukushima, T Suzuki, T Shimohata, M Oyake, H Ishiguro, K Hirota, A Miyashita, R Kuwano, H Kurisaki, H Yomono, J Goto, Kanazawa, I, S Tsuji

    NEUROLOGY   62 ( 4 )   648 - 651   2004.2

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    The authors identified two Japanese spinocerebellar ataxia (SCA) families characterized by postural and action tremor and a very slow progression rate. A genome-wide linkage analysis revealed linkage to chromosome 3p26.1-25.3 with the highest multipoint lod score at D3S3728 (Zmax=3.31 at theta=0.00). The candidate region was 14.7. cM flanked by D3S1620 and D3S3691, which was partly overlapping with the locus of SCA15 characterized by pure cerebellar ataxia. Despite the difference in phenotypes, there remains a possibility that the causative gene for these Japanese SCA is allelic to SCA15.

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  • Five different genes, Eif4a1, Cd68, Supl15k, Sox15 and Fxr2h, are clustered in a 40 kb region of mouse chromosome 11

    A Miyashita, N Shimizu, N Endo, T Hanyuu, N Ishii, K Ito, Y Itoh, M Shirai, T Nakajima, S Odani, R Kuwano

    GENE   237 ( 1 )   53 - 60   1999.9

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    We characterized a region of the mouse genome disrupted by integration of a gene trap (GT) vector in ES cells. On 5' rapid amplification of cDNA ends analysis of the fusion transcripts containing the GT vector, we identified the eukaryotic protein synthesis initiation factor 4A1 gene (Eif4a1) as a promoter-trapped gene. Plasmid rescue was used to show that the other end of the integrated vector disrupted the murine homolog of the human fragile X mental retardation syndrome-related protein 2 gene (Fxr2h). Structural analysis of P1 clones, isolated from the wild-type mouse genome by PCR with Eif4a1-specific primers, indicated that the integration of the GT vector was accompanied by the deletion of about 35 kb of genomic DNA and that the disrupted region also included three genes, Cd68, Supl15h and Sox15, the latter two of which are transcribed in opposite directions with overlapping 3' ends. These five different genes at least, Eif4a1, Cd68, Supl15h, Sox15 and Fxr2h, are clustered in a 40 kb region. The chromosomal location of this region was mapped by means of interspecific backcross panel DNAs to the central part of mouse chromosome 11, exhibiting a known region of synteny with human chromosome 17. (C) 1999 Elsevier Science B.V. All rights reserved.

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  • Molecular cloning of a novel 130-kDa cytoplasmic protein, Ankhzn, containing ankyrin repeats hooked to a zinc finger motif

    K Ito, N Ishii, A Miyashita, K Tominaga, H Kuriyama, H Maruyama, M Shirai, M Naito, M Arakawa, R Kuwano

    BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS   257 ( 1 )   206 - 213   1999.4

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    A novel gene was trapped in mouse embryonic stem cells with a promoterless gene trap vector. Fused transcripts were isolated from the embryos by rapid amplification of cDNA ends, which were used for full-length cDNA cloning. The protein predicted from the cDNA consisting of 7143 nucleotides comprises 1184 amino acids, which was confirmed by in vitro transcription/translation assaying An antibody against the synthesized peptide reacted with an approximate 130-kDa protein on SDS-PAGE. A search of available databases revealed that this protein is a novel protein composed of 17 ankyrin repeats hooked to a zinc finger motif, which we named Ankhzn. Ankhzn was observed on the endosomal membrane on immunoelectron microscopic analysis. Ankhzn belongs to a new subgroup of double zinc finger proteins which may be involved in vesicle or protein transport. Ankhzn mRNA and its protein were expressed ubiquitously from embryonic day 10.5 to adulthood. (C) Academic Press.

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  • A gene trap strategy for identifying the gene expressed in the embryonic nervous system Reviewed

    M Shirai, A Miyashita, N Ishii, Y Itoh, Satokata, I, YG Watanabe, R Kuwano

    ZOOLOGICAL SCIENCE   13 ( 2 )   277 - 283   1996.4

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    An efficient gene trap strategy was devised for identifying the genes that are expressed in the mouse developing nervous system. Mouse embryonic stem (ES) cell lines that carried independent integrations of a gene trap vector, pSneolNlacZA, were allowed to differentiate in a suspension culture system. To select cells containing neurons, astrocytes or neuron-glia precursors, cell lines were immunohistochemically examined with antibodies against neuron-specific proteins (neurofilament protein 150 kD and microtubule associated protein 2), glial fibrillary acidic protein or nestin. Three cell clones (GT3-8, 11 and 12) were immunoreactive to either of the antibodies employed and at the same time positive for beta-galactosidase activity. When chimeric embryos were generated by the use of the above 3 cell lines, some cells in their nervous system showed X-gal staining. Thus the major advantage of the present gene trap method lies in its prescreening step of manipulated ES cells prior to generation of chimeric animals. This method holds promise as a useful tool for investigating the genes involved in the development of the nervous system.

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Books

  • アルツハイマー病治療の新たなストラテジー

    宮下哲典, 原範和, 池内健( Role: Joint author ,  Part 2・アルツハイマー病の発症機序:4. GWASによるアルツハイマー病関連遺伝子探索)

    先端医学社  2022.4  ( ISBN:9784865505405

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    Total pages:149   Responsible for pages:26-34   Language:Japanese Book type:Scholarly book

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  • CSF1R関連白質脳症:部分欠失を含む新規CSF1R変異の同定と臨床・画像的特徴

    石黒敬信, 今野卓哉, 原範和, 朱斌, 岡田聡, 柴田護, 雑賀玲子, 北野貴也, 祢津智久, 浜由香, 川添僚也, 岩田育子, 佐藤恒太, 春日健作, 宮下哲典, 小野寺理, 池内健

    日本神経学会学術大会プログラム・抄録集   64th   2023

  • 凍結保存脳の経年劣化についての検討

    齊藤祐子, 宮下哲典, 松原知康, 池内健, 高尾昌樹, 村山繁雄

    日本神経学会学術大会プログラム・抄録集   64th   2023

  • 神経核内封入体病(NIID)におけるNOTCH2NLC GGCリピート数と臨床所見,画像所見の比較

    樋口陽, 樋口陽, YUSRAN Ady Fitrah, 原範和, 種田朝音, 徳武孝允, 三浦健, 岩淵洋平, 五十嵐修一, 林秀樹, 石黒敬信, 三瓶一弘, 武田勇人, 高橋俊昭, 福原信義, 金澤雅人, 宮下哲典, 小野寺理, 池内健

    Dementia Japan   36 ( 4 )   2022

  • 非アルツハイマー型認知症における脳脊髄液アミロイドマーカーの挙動

    春日健作, 月江珠緒, 五十嵐一也, 石黒敬信, 徳武孝允, 宮下哲典, 池内健

    Dementia Japan   36 ( 4 )   2022

  • 遺伝・ゲノム学 日本人におけるアルツハイマー病感受性遺伝子 Invited

    宮下 哲典, 原 範和, 尾崎 浩一

    医学のあゆみ   274 ( 8 )   675 - 676   2020.8

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  • アルツハイマー病の原因遺伝子と感受性遺伝子 我々の取り組みと国内外の最新事情

    宮下 哲典, 原 範和, 春日 健作, 池内 健

    新潟医学会雑誌   134 ( 1 )   13 - 18   2020.1

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    認知症の半数以上を占めるアルツハイマー病(Alzheimer's Disease:AD)はガン、糖尿病、高血圧などと同じく「ありふれた疾患」である。個々人の遺伝的素因を背景に環境要因(ライフスタイル、食生活、運動など)が加わって潜行性に発症し、緩徐に不可逆的に進行する。遺伝要因、環境要因の寄与率はそれぞれおよそ6割、4割を占めることがこれまでに明らかにされている。マイクロサテライトマーカーを用いた連鎖解析、ジーンチップによるゲノムワイド関連解析(Genome-Wide Association Study:GWAS)、次世代シーケンサーを駆使したターゲットリシーケンシング、全エクソーム解析、全ゲノム解析によって、家族性AD、孤発性ADに関与する遺伝子や病的・保護的バリアントが続々と見出されている。1990年代に若年性の家族性ADの原因遺伝子として報告されたAPP、PSEN1、PSEN2のバリアント解析は、今では臨床診断を確定する際に極めて有効である。同じく1990年代に孤発性ADの感受性遺伝子として初めて報告されたAPOEは、その周辺領域を含めゲノムワイドなレベルで非常に強力にADと関連することが2000年代のGWASで確証された。認知機能、脳画像、液性バイオマーカー(アミロイドベータタンパクやタウタンパク)などの量的形質とも強い関連を示す。そのため孤発性ADの病態を解明し、その治療戦略を考える上で無視できない重要な感受性遺伝子としての地位が確立した。これまでのところ、APOEのインパクトを凌ぐAD感受性遺伝子やバリアントは報告されていない。本稿では講演内容の一部を抜粋し、ADの原因遺伝子、感受性遺伝子にフォーカスして論を進める。この機会にADの遺伝要因に関する理解を深め、今後の更なる研究展開に向けた糧としたい。(著者抄録)

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  • アルツハイマー病マルチオミックスデータを用いたシステム生物学的研究

    菊地正隆, 関谷倫子, 関谷倫子, 原範和, 宮下哲典, 桑野良三, 池内健, 飯島浩一, 飯島浩一, 中谷明弘

    日本生化学会大会(Web)   93rd   2020

  • 【認知症の遺伝子研究のこれまでとこれから】各論 アルツハイマー病に関与する遺伝子 ゲノムワイド関連解析で見いだされた感受性遺伝子 Invited

    宮下 哲典, 原 範和, 劉 李きん, 春日 健作, 池内 健

    老年精神医学雑誌   30 ( 11 )   1226 - 1235   2019.11

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    アルツハイマー病(AD)は糖尿病などと同じく「ありふれた疾患」である。遺伝的素因を背景にさまざまな環境要因が加わって潜行性に発症し、緩徐に不可逆的に進行する。ADは認知症全体のおよそ6〜7割を占め、最も頻度が高い。加齢が最大のリスク要因ではあるが、遺伝要因の寄与率はおよそ6割と見積もられている。これは、先天的な疾患感受性要因としてバリアント情報を軽視できないことを意味している。本稿では、AD感受性遺伝子について最新の知見を概説した。(著者抄録)

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  • 家族性アルツハイマー病で同定された新規PSEN1遺伝子変異の病的意義の検討

    三浦 健, 目崎 直実, Zhu Bin, 村上 涼太, Liu Lixin, 樋口 陽, 石黒 敬信, 月江 珠緒, 原 範和, 春日 健作, 宮下 哲典, 小野寺 理, 池内 健

    臨床神経学   59 ( Suppl. )   S352 - S352   2019.11

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  • 脳脊髄液バイオマーカーによるAlzheimer’s clinical syndromeの検討

    春日健作, 月江珠緒, 原範和, 樋口陽, 樋口陽, 石黒敬信, 石黒敬信, 徳武孝允, 宮下哲典, 小野寺理, 池内健

    日本神経学会学術大会プログラム・抄録集   59 ( Suppl. )   S217 - S217   2019.11

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  • SORL1レアバリアントとアルツハイマー病発症リスクとの遺伝的関連

    月江珠緒, 原範和, 宮下哲典, LIU Lixin, 樋口陽, ZHU Bin, 春日健作, 桑野良三, 桑野良三, 岩坪威, 池内健

    Dementia Japan   33 ( 4 )   524   2019.10

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  • ALSP患者において同定されたCSF1R変異の機能アッセイ

    朱斌, LIU Lixin, 三浦健, 樋口陽, 原範和, 月江珠緒, 今野卓哉, 春日健作, 宮下哲典, 池内健

    Dementia Japan   33 ( 4 )   548 - 548   2019.10

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  • 日本人集団におけるアルツハイマー病ポリジェニック解析

    菊地正隆, 宮下哲典, 原範和, 重水大智, 尾崎浩一, 新飯田俊平, 池内健, 中谷明弘

    Dementia Japan   33 ( 4 )   562   2019.10

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  • 日本人集団におけるABCA7機能喪失型変異とアルツハイマー病発症リスクとの関連

    原範和, 宮下哲典, LIU Lixin, 樋口陽, 朱斌, 月江珠緒, 春日健作, 桑野良三, 岩坪威, 池内健

    Dementia Japan   33 ( 4 )   547   2019.10

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  • 日本人におけるAPOEのコモン・レアバリアント解析

    宮下哲典, 原範和, 春日健作, LIU Lixin, 樋口陽, ZHU Bin, 月江珠緒, 石黒敬信, 村上涼太, 菊地正隆, 中谷明弘, 尾崎浩一, 新飯田俊平, 赤澤宏平, 桑野良三, 桑野良三, 岩坪威, 岩坪威, 池内健

    Dementia Japan   33 ( 4 )   519 - 519   2019.10

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  • Genetic Analysis of Alzheimer’s Disease: The Impact of Rare Variants and Their Significance Invited

    宮下哲典, LIU Lixin, 原範和

    Brain and Nerve   71 ( 10 )   1071‐1079 - 1079   2019.10

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    Next generation sequencing (NGS) technology has dramatically influenced the field of omics studies, such as genomics and transcriptomics. It is now possible to access a significant number of previously known and novel genomic variants through NGS. Although the effective manipulation and accurate interpretation of the inordinate amount of data may pose a considerable challenge, it enables us to identify specific genes responsible for causing or influencing the susceptibility to a plethora of diseases. Alzheimer's disease (AD) is the most common etiology of dementia in the elderly (approximately 60-70%). The current research trend of AD genetics focuses on the analysis of rare variants (allelic frequency <1%) instead of common variants (allelic frequency >1%) to identify AD-associated genes/variants. A number of genes (such as TREM2, ABCA7, SORL1) that carry rare pathogenic variants have reportedly conferred susceptibility to AD with stronger genetic risk effects (odds ratio >2.0). Here, we are going to introduce a small part of the latest many attractive findings about AD genetic researches.

    DOI: 10.11477/mf.1416201406

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  • 血漿炎症系サイトカインと脳脊髄液バイオマーカーとの関連

    樋口陽, 樋口陽, 春日健作, ZHU Bin, LIU Lixin, 石黒敬信, 石黒敬信, 徳武孝允, 宮下哲典, 小野寺理, 池内健

    Dementia Japan   33 ( 4 )   548 - 548   2019.10

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  • ヒト死後脳におけるAPP・APOEの遺伝子発現解析

    LIU Lixin, 宮下哲典, 村上涼太, ZHU Bin, 原範和, 菊地正隆, 月江珠緒, 樋口陽, 春日健作, 中谷明弘, 赤津裕康, 柿田明美, 村山繁雄, 池内健

    Dementia Japan   33 ( 4 )   519 - 519   2019.10

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  • 統合失調症患者の脳内ゲノムにおけるコピー数変異の評価

    坂井 美和子, 渡部 雄一郎, 染矢 俊幸, 荒木 一明, 澁谷 雅子, 新里 和弘, 大島 健一, 國井 泰人, 矢部 博興, 松本 純弥, 和田 明, 日野 瑞城, 橋本 健志, 菱本 明豊, 北村 登, 入谷 修司, 白川 治, 前田 潔, 宮下 哲典, 丹羽 真一, 高橋 均, 柿田 明美, 桑野 良三, 那波 宏之

    精神神経学雑誌   ( 2019特別号 )   S603 - S603   2019.6

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  • Clinicopathologic Features of an Autopsied Patient with Idiopathic Basal Ganglia Calcification (Fahr's disease), Who Had Stayed in a Mental Hospital for a Longterm under the Diagnosis of Schizophrenia

    伊藤 陽, 吉田 浩樹, 清水 敬三, 長谷川 まこと, 今野 公和, 中原 亜紗, 原 範和, 宮下 哲典, 池内 健, 豊島 靖子, 柿田 明美

    精神医学 = Clinical psychiatry   61 ( 5 )   595 - 603   2019.5

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  • 認知症性疾患のバイオリソースの構築と活用:新潟大学脳研究所における取り組み

    宮下哲典, 月江珠緒, 原範和, 廣瀬美香, 小林智子, 佐藤怜奈, 河合麗子, 平井香織, 高殿恵子, 春日健作, 池内健

    Dementia Japan   32 ( 3 )   450   2018.9

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  • 認知症臨床ゲノム情報データベース構築に関する開発研究

    池内健, 新飯田俊平, 佐々木貴史, 宮下哲典, 尾崎浩一, 広瀬信義, 中谷明弘, 柿田明美, 鈴木一詩, 齋藤祐子, 村山繁雄, 橋詰良夫, 寺田整司, 吉田真理, 嶋田裕之, 三村将, 岡野栄之, 岩坪威, 秋山治彦, 森啓

    Dementia Japan   32 ( 3 )   462 - 462   2018.9

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  • ポリジェニックハザードスコアを用いたアルツハイマー病発症年齢解析

    菊地正隆, 宮下哲典, 池内健, 中谷明弘

    Dementia Japan   32 ( 3 )   433   2018.9

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  • アルツハイマー病剖検脳を用いたAPOE遺伝型とミエリン関連遺伝子発現との関連

    原範和, 宮下哲典, 柿田明美, 池内健

    Dementia Japan   32 ( 3 )   429   2018.9

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  • 家族性アルツハイマー病で同定された新規PSEN1変異の病的意義の検討

    ZHU Bin, 村上涼太, LIU Lixin, 樋口陽, 石黒敬信, 三浦健, 目崎直美, 月江珠緒, 原範和, 春日健作, 宮下哲典

    Dementia Japan   32 ( 3 )   448 - 448   2018.9

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  • アルツハイマー病の原因遺伝子と感受性遺伝子:我々の取り組みと国内外の最新情報

    宮下哲典, 原範和, 菊地正隆, 月江珠緒, 春日健作, 中谷明弘, 池内健

    Dementia Japan   32 ( 3 )   365   2018.9

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  • 脳脊髄液バイオマーカーAT(N)systemをもちいた認知症関連疾患の再考

    春日健作, 月江珠緒, 石黒敬信, 石黒敬信, 三浦健, 目崎直実, 徳武孝允, 宮下哲典, 小野寺理, 池内健

    Dementia Japan   32 ( 3 )   417 - 417   2018.9

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  • 多数例のエクソーム解析データに基づいた新規アルツハイマー病関連遺伝子の同定

    田中真生, 田中真生, 新見淳, 石浦浩之, 三井純, 宮下哲典, 桑野良三, 池内健, 辻省次, 辻省次

    Dementia Japan   32 ( 3 )   449 - 449   2018.9

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  • APOE遺伝型はAPPの遺伝子発現量に影響を及ぼすか?:ヒト死後脳における検証

    村上涼太, 朱斌, 原範和, 菊地正隆, 月江珠緒, 春日健作, 宮下哲典, 中谷明弘, 赤津裕康, 柿田明美, 村山繁雄, 池内健

    Dementia Japan   32 ( 3 )   429 - 429   2018.9

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  • 筋疾患・神経疾患のジェネティクス アルツハイマー病

    原範和, 宮下哲典, 池内健

    Clinical Neuroscience   36 ( 2 )   222‐226   2018.2

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  • 【ニューロジェネティクス新時代 次世代シークエンサーが拓く新しい世界】 筋疾患・神経疾患のジェネティクス アルツハイマー病

    原 範和, 宮下 哲典, 池内 健

    Clinical Neuroscience   36 ( 2 )   222 - 226   2018.2

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  • 染色体高次構造を介したアルツハイマー病リスクバリアントの影響

    菊地正隆, 原範和, 長谷川舞衣, 宮下哲典, 桑野良三, 池内健, 中谷明弘

    日本分子生物学会年会プログラム・要旨集(Web)   41st   2018

  • アルツハイマー病関連ノンコーディングバリアントの染色体高次構造解析

    菊地 正隆, 原 範和, 長谷川 舞衣, 宮下 哲典, 桑野 良三, 池内 健, 中谷 明弘

    生命科学系学会合同年次大会   2017年度   [2P - 1343]   2017.12

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  • アルツハイマー病GWASデータを用いたポリジェニック解析

    菊地 正隆, 宮下 哲典, 池内 健, 中谷 明弘

    Dementia Japan   31 ( 4 )   570 - 570   2017.10

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  • アルツハイマー病剖検脳を用いたRNA-seq解析

    原 範和, 宮下 哲典, 菊地 正隆, 中谷 明弘, 柿田 明美, 池内 健

    Dementia Japan   31 ( 4 )   571 - 571   2017.10

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  • エクソーム解析データに基づくY染色体欠失の検出とアルツハイマー病との関連性の検討

    田中 真生, 石浦 浩之, 三井 純, 宮下 哲典, 桑野 良三, 池内 健, 辻 省次

    Dementia Japan   31 ( 4 )   612 - 612   2017.10

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  • エクソーム解析データに基づく孤発性アルツハイマー病における疾患関連遺伝子の検討

    新見 淳, 田中 真生, 石浦 浩之, 三井 純, 宮下 哲典, 桑野 良三, 池内 健, 辻 省次

    Dementia Japan   31 ( 4 )   612 - 612   2017.10

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  • Genetic risk factors for Alzheimer disease Invited

    宮下 哲典, 原 範和, 春日 健作, 菊地 正隆, 中谷 明弘, 池内 健

    老年精神医学雑誌   28 ( 7 )   754 - 765   2017.7

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  • 末梢血・網羅的RNA-Seq解析により示されたアルツハイマー病に特徴的な遺伝子発現変動

    原 範和, 石黒 敬信, 目崎 直実, 三浦 健, 春日 健作, 月江 珠緒, 宮下 哲典, 池内 健

    Dementia Japan   30 ( 4 )   599 - 599   2016.10

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  • 【認知症の診断と治療:最近の進歩】 ゲノム解析による認知症の臨床・病態解明

    原 範和, 春日 健作, 宮下 哲典, 池内 健

    臨床精神医学   45 ( 4 )   395 - 403   2016.4

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  • Elucidation of pathogenesis and clinical presentation in dementia by molecular genetic analysis

    原 範和, 春日 健作, 宮下 哲典, 池内 健

    臨床精神医学   45 ( 4 )   395 - 403   2016.4

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  • 日本人アルツハイマー病に関連するコピー数変異のゲノム配列中での構造と分布

    中谷 明弘, 菊地 正隆, 宮下 哲典, 原 範和, 春日 健作, 西田 奈央, 徳永 勝士, 桑野 良三, 池内 健

    日本生化学会大会・日本分子生物学会年会合同大会講演要旨集   88回・38回   [2P1263] - [2P1263]   2015.12

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  • アルツハイマー病感受性領域が近接する染色体領域の同定

    菊地 正隆, 原 範和, 長谷川 舞衣, 宮下 哲典, 桑野 良三, 池内 健, 中谷 明弘

    日本生化学会大会・日本分子生物学会年会合同大会講演要旨集   88回・38回   [1P1213] - [1P1213]   2015.12

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  • 本邦における家族性アルツハイマー病データベース(JFADdb)の構築

    春日 健作, 菊地 正隆, 徳武 孝允, 手塚 敏之, 月江 珠緒, 原 範和, 宮下 哲典, 中谷 明弘, 桑野 良三, 池内 健

    臨床神経学   55 ( Suppl. )   S424 - S424   2015.12

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  • アルツハイマー病の血清バイオマーカーとしてのマイクロRNA解析

    原 範和, 菊地 正隆, 宮下 哲典, 初田 裕幸, 齊藤 祐子, 村山 繁雄, 春日 健作, 池内 健, 桑野 良三

    Dementia Japan   29 ( 3 )   338 - 338   2015.9

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  • アルツハイマー病感受性領域が近接する染色体領域の同定

    菊地 正隆, 原 範和, 長谷川 舞衣, 宮下 哲典, 桑野 良三, 池内 健, 中谷 明弘

    Dementia Japan   29 ( 3 )   421 - 421   2015.9

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  • DNA保存高齢者連続剖検2000例におけるアルツハイマー型老年性変化の検討

    初田 裕幸, 高尾 昌樹, 中野 雄太, 内野 彰子, 野上 茜, 隅蔵 大幸, 齊藤 祐子, 新井 冨生, 宮下 哲典, 桑野 良三, 池内 健, 村山 繁雄

    臨床神経学   54 ( Suppl. )   S135 - S135   2014.12

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  • DNA保存高齢者連続剖検2000例におけるアルツハイマー型老年性変化の検討

    初田 裕幸, 高尾 昌樹, 中野 雄太, 内野 彰子, 隅蔵 大幸, 齊藤 祐子, 宮下 哲典, 桑野 良三, 池内 健, 村山 繁雄

    Dementia Japan   28 ( 4 )   519 - 519   2014.10

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  • アルツハイマー病における生体分子間ネットワーク解析手法の提案

    菊地 正隆, 原 範和, 宮下 哲典, 初田 裕幸, 齊藤 祐子, 村山 繁雄, 池内 健, 桑野 良三

    Dementia Japan   28 ( 4 )   476 - 476   2014.10

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  • ヒト剖検脳を用いたアルツハイマー病関連マイクロRNAの解析

    原 範和, 菊地 正隆, 宮下 哲典, 初田 裕幸, 齊藤 祐子, 村山 繁雄, 赤津 裕康, 池内 健, 桑野 良三

    Dementia Japan   28 ( 4 )   476 - 476   2014.10

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  • 本邦・家族性アルツハイマー病のデータベース(JFADdb)の構築

    春日 健作, 菊地 正隆, 徳武 孝允, 手塚 敏之, 月江 珠緒, 原 範和, 宮下 哲典, 中谷 明弘, 桑野 良三, 池内 健

    Dementia Japan   28 ( 4 )   485 - 485   2014.10

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  • 【神経症候群(第2版)-その他の神経疾患を含めて-】 変性疾患 認知症症状を主とする疾患 アルツハイマー病 家族性アルツハイマー病

    池内 健, 春日 健作, 宮下 哲典

    日本臨床   別冊 ( 神経症候群II )   7 - 11   2014.3

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  • 細胞特異的な染色体高次構造は遺伝子発現を調節するのか?

    菊地正隆, 長谷川舞衣, 原範和, 宮下哲典, 中谷明弘, 池内健, 桑野良三

    日本分子生物学会年会プログラム・要旨集(Web)   37th   2P-0351 (WEB ONLY)   2014

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  • The risk gene based pathogenesis of Alzheimer's disease

    宮下 哲典, 桑野 良三

    医学のあゆみ   247 ( 5 )   451 - 456   2013.11

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  • 【神経変性疾患-研究と診療の進歩】 神経変性疾患の病態機序の解明 疾患感受性遺伝子からみたAlzheimer病の病態機序

    宮下 哲典, 桑野 良三

    医学のあゆみ   247 ( 5 )   451 - 456   2013.11

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    がんの家系、糖尿病の家系、脳卒中の家系…と古くから病気は遺伝が影響するのではないかと疑われてきた。Alzheimer病(AD)も遺伝素因の関与が強く示唆され、常染色体優性遺伝形式をとる単一遺伝子病の報告に続いて孤発性ADについても多くの遺伝的感受性遺伝子が同定された。とりわけApolipoprotein E遺伝子は民族を超えて強力なリスク遺伝子である。AD関連遺伝子の解析法もこの10年間で、家系をベースとした連鎖解析、同胞対解析、細胞生物学的機能から推測した候補遺伝子アプローチ、SNPベースの大規模GWAS(Genome-wide association study)、客観的バイオマーカーの中間表現型と遺伝型解析、解析も数千を超える検体数、と大きく進化した。(著者抄録)

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  • 家族性および早発型アルツハイマー病症例におけるAPP重複変異の探索

    池内 健, 温 雅南, 針谷 康夫, 宮下 哲典, 中谷 明弘, 月江 珠緒, 春日 健作, 田中 晋, 西澤 正豊, 桑野 良三

    Dementia Japan   27 ( 4 )   487 - 487   2013.10

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  • アルツハイマー病における体液中バイオマーカーの解析 J-ADNI研究

    月江 珠緒, 菊地 正隆, 中谷 明弘, 宮下 哲典, 池内 健, 桑野 良三, 岩坪 威, J-ADNI

    Dementia Japan   27 ( 4 )   480 - 480   2013.10

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  • 晩期発症型アルツハイマー病とTREM2の関連解析

    宮下 哲典, 温 雅楠, 初田 裕幸, 村山 繁雄, 山口 晴保, 赤津 裕康, 柿田 明美, 高橋 均, 井原 康夫, 池内 健, 桑野 良三, JGSCAD(The, Japanese, Genetic Study Consortium for Alzheimer's Disease

    Dementia Japan   27 ( 4 )   483 - 483   2013.10

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  • アルツハイマー病におけるタンパク質ドメイン間相互作用ネットワーク解析

    菊地 正隆, 宮下 哲典, 初田 裕幸, 齊藤 祐子, 村山 繁雄, 池内 健, 桑野 良三

    Dementia Japan   27 ( 4 )   485 - 485   2013.10

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  • 慢性透析患者におけるα-ガラクトシダーゼA(α-Gal)p.E66Q変異の検討

    渡辺 博文, 後藤 眞, 宮下 哲典, 桑野 良三, 丸山 弘樹, 成田 一衛

    日本腎臓学会誌   55 ( 3 )   377 - 377   2013.4

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  • 細胞特異的なゲノム高次構造解析法の検討

    長谷川舞衣, 原範和, 菊地正隆, 宮下哲典, 中谷明弘, 池内健, 桑野良三

    日本分子生物学会年会プログラム・要旨集(Web)   36th   3P-0021 (WEB ONLY)   2013

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  • AD/GD CNVdb:アルツハイマー病のコピー数変異データベース

    中谷明弘, 宮下哲典, 菊地正隆, 長谷川舞衣, 原範和, 西田奈央, 徳永勝士, 井原康夫, 池内健, 桑野良三

    日本分子生物学会年会プログラム・要旨集(Web)   36th   1P-0913 (WEB ONLY)   2013

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  • C-Pittsburg Compound B(PIB)集積と、病理学的アミロイドβ(Aβ)沈着の、解剖学的部位別検討 6剖検例における検討

    初田 裕幸, 石井 賢二, 高尾 昌樹, 金丸 和富, 新井 冨生, 齊藤 祐子, 宮下 哲典, 桑野 良三, 須原 哲也, 島田 斉, 篠遠 仁, 村山 繁雄

    臨床神経学   52 ( 12 )   1401 - 1401   2012.12

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  • アルツハイマー病とSORL1の関連解析

    宮下 哲典, 温 雅楠, 月江 珠緒, 桑野 良三

    Dementia Japan   26 ( 4 )   513 - 513   2012.10

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  • 脳脊髄液中のアミロイドβ1-42、総タウ、リン酸化タウの測定 J-ADNI研究

    月江 珠緒, 宮下 哲典, 池内 健, 中谷 明弘, 桑野 良三, 岩坪 威

    Dementia Japan   26 ( 4 )   481 - 481   2012.10

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  • <sup>11</sup>C-Pittsburg Compound B(PIB)集積と,病理学的アミロイドβ(Aβ)沈着の,解剖学的部位別検討-6剖検例における検討

    初田裕幸, 石井賢二, 高尾昌樹, 金丸和富, 新井冨生, 齊藤祐子, 宮下哲典, 桑野良三, 須原哲也, 島田斉, 篠遠仁, 村山繁雄

    日本神経学会学術大会プログラム・抄録集   53rd   2012

  • アルツハイマー病のコピー数多型解析

    中谷明弘, 宮下哲典, 西田奈央, 徳永勝士, 井原康夫, 井原康夫, 桑野良三

    日本分子生物学会年会プログラム・要旨集(Web)   35th   2012

  • 後部帯状回と楔前部におけるアミロイドβ沈着

    初田 裕幸, 高尾 昌樹, 伊藤 慎治, 杉山 美紀子, 新井 冨生, 沢辺 元司, 石井 賢二, 宮下 哲典, 桑野 良三, 齊藤 祐子, 村山 繁雄

    臨床神経学   51 ( 12 )   1210 - 1210   2011.12

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  • 【認知症学(上)-その解明と治療の最新知見-】 臨床編 認知症診断に用いられる検査診断学とバイオマーカー 各論 遺伝子診断とイメージング・ジェネティクス

    宮下 哲典, 桑野 良三

    日本臨床   69 ( 増刊8 認知症学(上) )   565 - 569   2011.10

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    Other Link: http://search.jamas.or.jp/link/ui/2012026227

  • 脳脊髄液中のアミロイドβ、総タウ、リン酸化タウの測定 J-ADNI研究

    月江 珠緒, 宮下 哲典, 池内 健, 中谷 明弘, 桑野 良三, 岩坪 威

    Dementia Japan   25 ( 3 )   345 - 345   2011.10

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  • アルツハイマー病脳の遺伝子発現プロファイリング

    宮下 哲典, 齊藤 祐子, 初田 裕幸, 月江 珠緒, 村山 繁雄, 井原 康夫, 中谷 明弘, 桑野 良三

    Dementia Japan   25 ( 3 )   345 - 345   2011.10

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  • 【認知症学(上)-その解明と治療の最新知見-】 基礎編 認知症関連分子生物学 各論 Apolipoprotein E遺伝子

    桑野 良三, 宮下 哲典

    日本臨床   69 ( 増刊8 認知症学(上) )   93 - 97   2011.10

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    Other Link: http://search.jamas.or.jp/link/ui/2012026136

  • 【認知症学(上)-その解明と治療の最新知見-】 臨床編 認知症診断に用いられる検査診断学とバイオマーカー 検査診断学とバイオマーカー:概論

    桑野 良三, 宮下 哲典, 月江 珠緒

    日本臨床   69 ( 増刊8 認知症学(上) )   476 - 483   2011.10

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  • Genome-wide association study of late-onset Alzheimer's disease in Japanese

    Ryozo Kuwano, Akinori Miyashita, Asako Koike, Nao Nishida, Katsusi Tokunaga, Ken Yamamoto, Shoji Tsuji, Yasuo Ihara

    NEUROSCIENCE RESEARCH   71   E290 - E290   2011

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    DOI: 10.1016/j.neures.2011.07.1266

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  • 認知症のイメージングゲノミクス

    宮下 哲典

    別冊・医学のあゆみ   57 - 61   2011

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  • CARASILの原因遺伝子HTRA1の同定と機能解析

    原 賢寿, 志賀 篤, 福武 敏夫, 宮下 哲典, 横関 明男, 高橋 俊昭, 田村 正人, 下江 豊, 平山 幹夫, 有里 敬代, 柳川 宗平, 中野 今治, 池田 修一, 吉田 豊, 池内 健, 桑野 良三, 西澤 正豊, 辻 省次, 小野寺 理

    臨床神経学   50 ( 12 )   1075 - 1075   2010.12

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  • 健忘主体の臨床型を呈するタウ遺伝子R406W変異を伴う家族性認知症の臨床遺伝学的解析

    池内 健, 春日 健作, 宮下 哲典, 川瀬 康裕, 杉下 守弘, 桑野 良三, 西澤 正豊

    臨床神経学   50 ( 12 )   1080 - 1080   2010.12

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  • 楔前部と後部帯状回におけるアミロイドβ沈着

    初田 裕幸, 足立 正, 舟辺 さやか, 杉山 美紀子, 沢辺 元司, 石井 賢二, 宮下 哲典, 桑野 良三, 村山 繁雄

    臨床神経学   50 ( 12 )   1224 - 1224   2010.12

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  • TDP-43の喪失により、細胞内膜系関連遺伝子のスプライシング異常が起こる(TDP-43 depletion causes aberrant splicing in the genes associated with endomembrane system)

    志賀 篤, 石原 智彦, 宮下 哲典, 横尾 麻理子, 有泉 優子, 横関 明男, 桑野 良三, 西澤 正豊, 小野寺 理

    日本生化学会大会・日本分子生物学会年会合同大会講演要旨集   83回・33回   2P - 0916   2010.12

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  • Imaging genomics of dementia

    宮下 哲典, 桑野 良三

    医学のあゆみ   235 ( 6 )   663 - 667   2010.11

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  • 【認知症 研究・臨床の最先端】 最新研究動向 認知症のイメージングゲノミクス

    宮下 哲典, 桑野 良三

    医学のあゆみ   235 ( 6 )   663 - 667   2010.11

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    精神・神経疾患の病態解析の新しい手法として核磁気共鳴画像法やポジトロン断層法などの脳画像データとゲノム配列情報を統合する&quot;イメージングゲノミクス&quot;が注目されている。高次脳機能を解剖学的・生理学的変化として客観的にとらえ、個人ゲノムの多様性と関連づけることで、発症前診断や病気の進行を評価・予測することが将来的に可能となる。イメージングゲノミクスは統合失調症で先行して研究され、Alzheimer病(AD)でも成果が出はじめている。ADの強力な感受性遺伝子であるAPOEのε4アレルは、海馬や嗅内野の萎縮、βアミロイド蛋白の脳内沈着量と相関していた。ゲノムワイドSNP解析と合わせることで、海馬灰白質の萎縮に関連する遺伝子(C20orf132、ZBP1)があらたに見出された。このように、高次精神・神経活動の中間表現型としての脳画像を個人ゲノムの多様性と関連づけるイメージングゲノミクスは、新しい臨床-ゲノム科学として確立しつつある。(著者抄録)

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  • アルツハイマー病脳組織におけるSORL1の遺伝子発現解析

    温雅楠, 宮下哲典, 月江珠緒, 齊藤祐子, 初田裕幸, 村山繁雄, 柿田明美, 高橋均, 北村信隆, 赤澤宏平, 井原康夫, 桑野良三

    Dement Jpn   24 ( 3 )   191   2010.9

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  • アルツハイマー病脳組織におけるSORL1の遺伝子発現解析

    温 雅楠, 宮下 哲典, 月江 珠緒, 齊藤 祐子, 初田 裕幸, 村山 繁雄, 柿田 明美, 高橋 均, 北村 信隆, 赤澤 宏平, 井原 康夫, 桑野 良三

    Dementia Japan   24 ( 3 )   389 - 389   2010.9

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  • An autopsy case of familial Alzheimer&apos;s disease with an L381V substitution in the presenilin 1 gene

    T. Kosaka, Y. J. Fu, A. Ishikawa, T. Ikeuchi, A. Miyashita, R. Kuwano, A. Kakita, H. Takahashi

    BRAIN PATHOLOGY   20   17 - 17   2010.9

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  • 後部帯状回と楔前部におけるアミロイドβ沈着

    初田 裕幸, 齊藤 祐子, 伊藤 慎治, 杉山 美紀子, 舟辺 さやか, 新井 冨生, 沢辺 元司, 金丸 和富, 石井 賢二, 宮下 哲典, 桑野 良三, 村山 繁雄

    Dementia Japan   24 ( 3 )   306 - 306   2010.9

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  • 脳脊髄液中のアミロイドβ、総タウ、リン酸化タウ測定条件の検討

    月江 珠緒, 宮下 哲典, 池内 健, 角田 伸人, 高橋 智, 桑野 良三

    Dementia Japan   24 ( 3 )   309 - 309   2010.9

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  • 死後脳におけるアルツハイマー病関連遺伝子の発現プロファイリング

    宮下 哲典, 齊藤 祐子, 初田 裕幸, 月江 珠緒, 村山 繁雄, 井原 康夫, 桑野 良三

    Dementia Japan   24 ( 3 )   389 - 389   2010.9

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  • 【認知症診療マニュアル】 認知症性疾患の遺伝子と病態 認知症の遺伝子異常

    宮下 哲典, 桑野 良三

    神経内科   72 ( Suppl.6 )   40 - 45   2010.2

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  • 紀伊半島のALS/パーキンソン認知症複合におけるTRPM7遺伝子変異に関する検討

    小久保 康昌, 原 賢寿, 石浦 浩之, 福田 陽子, 宮下 哲典, 桑野 良三, 佐々木 良元, 後藤 順, 西澤 正豊, 葛原 茂樹, 辻 省次

    Dementia Japan   23 ( 2 )   217 - 217   2009.8

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  • 健忘を主体とする特異な臨床型を呈するタウ遺伝子(MAPT)R406W変異を伴う家族性認知症の臨床分子遺伝学的解析

    池内 健, 春日 健作, 宮下 哲典, 川瀬 康裕, 小野寺 理, 杉下 守弘, 桑野 良三, 西澤 正豊

    Dementia Japan   23 ( 2 )   175 - 175   2009.8

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  • 【疾患遺伝子の探索と超高速シークエンス パーソナルゲノム時代の疾患解明と治療戦略】 ゲノム医学と医療応用の最前線 アルツハイマー病の遺伝素因

    桑野 良三, 宮下 哲典

    実験医学   27 ( 12 )   1848 - 1853   2009.8

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    世界的にみると7秒に1人が認知症になっている。感染症や治療可能な病気を克服して高齢社会に突入した人類は、新しい病魔と向き合うことになった。認知症の大半を占めるアルツハイマー病は、ゆっくりであるが不可逆的に進行する。アルツハイマー病と気付いたときの脳病変はすでにもとに戻れない状態になっている。健康寿命を延ばすためには、脳機能が正常な段階でアルツハイマー病予備軍を探して、適切な予防対策を立てることである。個人を特徴づけるゲノム情報は、発症前診断として有効と考えられる。(著者抄録)

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  • アルツハイマー病のバイオマーカー探索 ヒト死後脳の網羅的な遺伝子発現解析による試み

    宮下 哲典, 齊藤 祐子, 初田 裕幸, 村山 繁雄, 井原 康夫, 桑野 良三

    Dementia Japan   23 ( 2 )   182 - 182   2009.8

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  • 晩期発症型アルツハイマー病とSORL1の相関解析

    温 雅楠, 宮下 哲典, 北村 信隆, 赤澤 宏平, 井原 康夫, 桑野 良三

    Dementia Japan   23 ( 2 )   182 - 182   2009.8

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  • 【ゲノム研究最前線 疾患ゲノム研究の現状と展望】 疾患領域別ゲノム研究 認知症

    桑野 良三, 武井 教展, 宮下 哲典

    日本臨床   67 ( 6 )   1078 - 1082   2009.6

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  • アルツハイマー病のパスウェイデータベースAlzPathwayの構築とリスク候補遺伝子の抽出

    飯島里紗, 荻島創一, 菊地正隆, 宮下哲典, 桑野良三, 田中博

    日本分子生物学会年会講演要旨集   32nd ( Vol.3 )   56   2009

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  • APOEを含む200kb領域の全SNPsを用いた相関解析および連鎖不平衡解析

    武井 教展, 宮下 哲典, 桑野 良三

    新潟医学会雑誌   122 ( 12 )   690 - 690   2008.12

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  • 2 APOEを含む200kb 領域の全SNPsを用いた相関解析および連鎖不平衡解析(I.一般演題,第8回新潟ゲノム医学研究会)

    武井 教展, 宮下 哲典, 桑野 良三

    新潟医学会雑誌   122 ( 12 )   690 - 690   2008.12

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  • 死後脳を用いた晩期発症型アルツハイマー病の網羅的遺伝子発現解析

    宮下 哲典, 斉藤 佑子, 柿田 明美, 荻島 創一, 田中 博, 村山 繁雄, 高橋 均, 井原 康夫, 桑野 良三

    Dementia Japan   22 ( 2 )   176 - 176   2008.8

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  • 【認知症のゲノミクス】 認知症の関連解析

    宮下 哲典, 桑野 良三

    Cognition and Dementia   7 ( 3 )   215 - 222   2008.7

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    認知症も多くの疾患と同じくゲノム情報を基盤に、生体内あるいは外部の環境要因が加わって生理機能に破綻をきたして発症すると考えられている。認知症は少数の若年発症の家族性単一遺伝病と大多数を占める孤発性認知症が知られている。65歳以上の高齢者では7〜10%がアルツハイマー病(AD)に罹患している。全ゲノム上のSNP位置、連鎖不平衡ブロックなどの公開データベースの充実、高密度SNPを搭載したSNPタイピングが可能となり、大規模相関解析が精度高く実施できる環境が整った。AD危険因子探索研究は、全ゲノムタイピングによる網羅的解析の激しい国際競争の「うねり」の中にある。候補遺伝子アプローチならびに染色体ワイドおよびゲノムワイド相関解析から新しいリスク遺伝子が同定されている。(著者抄録)

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  • アルツハイマー病の性差依存的なリスク遺伝子

    宮下 哲典, 桑野 良三

    治療   90 ( 4 )   1582 - 1585   2008.4

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  • 染色体10qにおけるアルツハイマー病のリスク遺伝子相互作用解析

    宮下 哲典, 朝倉 まどか, 郷野 辰行, 武井 教展, 桑野 良三

    新潟医学会雑誌   122 ( 2 )   116 - 116   2008.2

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  • 1 染色体10qにおけるアルツハイマー病のリスク遺伝子相互作用解析(I.一般演題,第7回新潟ゲノム医学研究会)

    宮下 哲典, 朝倉 まどか, 郷野 辰行, 武井 教展, 桑野 良三

    新潟医学会雑誌   122 ( 2 )   116 - 116   2008.2

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  • 6. マイクロサテライトマーカーを用いたFS・GEFS+・SMEIにおける新規責任遺伝子の網羅的検索(第1報)(一般演題,第1回日本てんかん学会東北地方会)

    吉田 秀一, 桑野 良三, 宮下 哲典, 小島 俊男, 佐々木 智美, 朱 剛, 金井 数明, 伊藤 正利, 藤田 浩史, 廣瀬 伸一, 兼子 直, てんかん, 熱性けいれん遺伝子解析グループ

    てんかん研究   25 ( 4 )   480 - 481   2008.1

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  • 【アルツハイマー病 基礎研究から予防・治療の新しいパラダイム】 基礎編 アルツハイマー病の病理・病態 アルツハイマー病の危険因子 関連遺伝子の探索 候補遺伝子アプローチ

    月江 珠緒, 宮下 哲典, 桑野 良三

    日本臨床   66 ( 増刊1 アルツハイマー病 )   163 - 168   2008.1

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    Other Link: http://search.jamas.or.jp/link/ui/2008120204

  • マイクロサテライトマーカーを用いたFS・GEFS+・SMEIにおける新規責任遺伝子の網羅的検索(第1報)

    吉田 秀一, 桑野 良三, 宮下 哲典, 小島 俊男, 佐々木 智美, 朱 剛, 金井 数明, 伊藤 正利, 藤田 浩史, 廣瀬 伸一, 兼子 直

    てんかん研究   25 ( 4 )   480 - 481   2008.1

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  • Susceptibility genes for Alzheimer's disease: candidate gene approach

    月江 珠緒, 宮下 哲典, 桑野 良三

    Japanese journal of clinical medicine   66 ( 0 )   163 - 168   2008.1

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  • アルツハイマー病1500例におけるNeprilysinの多型解析

    後藤 順, 岸野 敦志, 高橋 祐二, 宮下 哲典, 桑野 良三, 辻 省次

    臨床神経学   47 ( 12 )   1158 - 1158   2007.12

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  • 西太平洋地域の筋萎縮性側索硬化症/パーキンソン痴呆複合(ALS/PDC)と関連神経変性疾患 紀伊ALS/PDCの分子遺伝学的解析

    原 賢寿, 桑野 良三, 宮下 哲典, 小久保 康昌, 佐々木 良元, 中原 康雄, 後藤 順, 西澤 正豊, 葛原 茂樹, 辻 省次

    臨床神経学   47 ( 11 )   974 - 976   2007.11

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  • O2-13 Genome-wide Search for the Responsible Loci Associated with FS, GEFS + and SMEI(The 41^<th> Congress of the Japan Epilepsy Society)

    吉田 秀一, 桑野 良三, 宮下 哲典, 小島 俊男, 佐々木 智美, 朱 剛, 金井 数明, 伊藤 正利, 藤田 浩史, 小国 弘量, 廣瀬 伸一, 兼子 直, てんかん遺伝子解析グループ

    Journal of the Japan Epilepsy Society   25 ( 3 )   293 - 293   2007.9

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  • マイクロサテライトマーカーを用いたFS・GEFS+・SMEIにおける新規責任遺伝子の網羅的探索

    吉田 秀一, 桑野 良三, 宮下 哲典, 小島 俊男, 佐々木 智美, 朱 剛, 金井 数明, 伊藤 正利, 藤田 浩史, 小国 弘量, 廣瀬 伸一, 兼子 直

    てんかん研究   25 ( 3 )   293 - 293   2007.9

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  • 3 アルツハイマー病の疾患感受性遺伝子探索 : 染色体10番長腕での試み(第6回新潟ゲノム医学研究会)

    宮下 哲典, 月江 珠緒, 菅井 貴裕, 桑野 良三

    新潟医学会雑誌   121 ( 6 )   361 - 361   2007.6

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  • アルツハイマー病の疾患感受性遺伝子探索 染色体10番長腕での試み

    宮下 哲典, 月江 珠緒, 菅井 貴裕, 桑野 良三

    新潟医学会雑誌   121 ( 6 )   361 - 361   2007.6

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  • ロシアのヤクーツク地方に多発する劣性遺伝性小人症のゲノムワイド連鎖解析と原因遺伝子同定

    原 賢寿, Maximova Nadya R, 宮下 哲典, 桑野 良三, 西澤 正豊, 小野寺 理

    新潟医学会雑誌   121 ( 6 )   362 - 362   2007.6

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  • 6 ロシアのヤクーツク地方に多発する劣性遺伝性小人症のゲノムワイド連鎖解析と原因遺伝子同定(第6回新潟ゲノム医学研究会)

    原 賢寿, Maximova Nadya R, 宮下 哲典, 桑野 良三, 西澤 正豊, 小野寺 理

    新潟医学会雑誌   121 ( 6 )   362 - 362   2007.6

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  • Dynamin-binding protein gene on chromosome 10q is associated with late-onset Alzheimer's disease

    Journal of St. Marianna Medical Institute   7 ( 82 )   59 - 71   2007

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  • 第8番染色体長腕に連鎖する成人発症良性遺伝性舞踏病

    原 賢寿, 下畑 享良, 三瓶 一弘, 河内 泉, 金澤 雅人, 春日 健作, 宮下 哲典, 桑野 良三, 辻 省次, 小野寺 理, 西澤 正豊, 本間 義章

    臨床神経学   46 ( 12 )   1119 - 1119   2006.12

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  • 【アルツハイマー病のdisease-modifying therapyをめぐって】 Genetic riskとpatient selection

    桑野 良三, 宮下 哲典

    Cognition and Dementia   5 ( 4 )   307 - 315   2006.10

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    認知症の最も大きなリスクファクターは加齢である。長生きと引き換えに人類は新しい難病と向き合うこととなった。世界が高齢化に向かう現在、高齢社会にある日本は先導的に研究が行えるし、行う必要がある。認知症の3分の2を占めるアルツハイマー病の病因解明の糸口の1つに、遺伝的危険因子の同定がある。とりわけ全ゲノムをスクリーニングして新しいリスク遺伝子を発見することは、これまでに予想しなかった発病・進行に関わる分子に遭遇することが期待される。遺伝子型解析に際して、最も重要なことは、疾患と正常とを明確に区別することである。両親から受け継いだゲノム構造は、基本的には生まれてから死ぬまで普遍であるので、地域、性別、年齢、教育、治療、介入、食事、ライフスタイルなどの環境が発病や病型に修飾を与えている点に注意を払って、遺伝的危険因子の解析に取り組む必要がある。(著者抄録)

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  • 遺伝性Lewy小体病を表現型としたpresenilin-1変異(ΔT440)によるin vivoおよびin vitroにおけるα-synuclein蓄積の検討

    金子 博之, 池内 健, 石川 厚, 柿田 明美, 宮下 哲典, 桑野 良三, 伊藤 弦太, 岩坪 威, 高橋 均, 西澤 正豊, 小野寺 理

    Dementia Japan   20 ( 2 )   168 - 168   2006.8

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  • 【アルツハイマー病診断・治療の新しい展開】 病理過程の新しい理解 アルツハイマー病のリスク遺伝子

    宮下 哲典, 桑野 良三

    Pharma Medica   24 ( 7 )   13 - 17   2006.7

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  • アルツハイマー病の分子遺伝学 (ゲノムから生命システムへ) -- (ゲノムから医学)

    宮下 哲典, 桑野 良三

    蛋白質核酸酵素   50 ( 16 )   2122 - 2127   2005.12

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  • PS1遺伝子変異によりレビー小体型痴呆と変異型アルツハイマー病を合併した1家系

    石川 厚, 朴 月善, 宮下 哲典, 桑野 良三, 小野寺 理, 西澤 正豊, 高橋 均

    臨床神経学   45 ( 12 )   1097 - 1097   2005.12

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  • 禿頭と変形性脊椎症を伴う劣性遺伝性白質脳症(CARASIL)の連鎖解析

    原 賢寿, 小野寺 理, 宮下 哲典, 福武 敏夫, 宮野 悟, 塩田 宏嗣, 田村 正人, 藤野 泰祐, 下江 豊, 平山 幹生, 有里 敬代, 柳川 宗平, 桑野 良三, 西澤 正豊, 辻 省次

    臨床神経学   45 ( 12 )   1147 - 1147   2005.12

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  • 【ゲノムから生命システムへ】 ゲノムから医学 アルツハイマー病の分子遺伝学

    宮下 哲典, 桑野 良三

    蛋白質・核酸・酵素   50 ( 16 )   2122 - 2127   2005.12

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    アルツハイマー病は,家族性と孤発性に分けられる.常染色体優性遺伝形式をとる家族性の早期発症型アルツハイマー病の遺伝解析が行なわれ,3つの原因遺伝子APP,PSEN1,PSEN2が同定された.孤発性のアルツハイマー病に関しては,染色体19q13のapolipoprotein E(APOE)が民族をこえた遺伝的危険因子として唯一認められている.しかし,APOEで説明がつくのは全体の30%以下であるので,そのほかに危険因子の存在が示唆されている.一方,モデルマウスを用いてゲノムをベースに環境因子関連の研究が進んでいる(著者抄録)

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  • 4 アルツハイマー病の疾患感受性遺伝子探索(I.一般演題,第5回新潟ゲノム医学研究会)

    宮下 哲典, 武井 教展, 月江 珠緒, 桑野 良三

    新潟医学会雑誌   119 ( 11 )   695 - 695   2005.11

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  • 3 禿頭と変形性脊椎症を伴う劣性遺伝性白質脳症(CARASIL)の連鎖解析(I.一般演題,第5回新潟ゲノム医学研究会)

    原 賢寿, 小野寺 理, 宮下 哲典, 福武 敏夫, 宮野 悟, 塩田 宏嗣, 田村 正人, 藤野 泰祐, 下江 豊, 平山 幹生, 有里 敬代, 柳川 宗平, 桑野 良三, 西澤 正豊, 辻 省次

    新潟医学会雑誌   119 ( 11 )   695 - 695   2005.11

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  • 禿頭と変形性脊椎症を伴う劣性遺伝性白質脳症(CARASIL)の連鎖解析

    原 賢寿, 小野寺 理, 宮下 哲典, 福武 敏夫, 宮野 悟, 塩田 宏嗣, 田村 正人, 藤野 泰祐, 下江 豊, 平山 幹生, 有里 敬代, 柳川 宗平, 桑野 良三, 西澤 正豊, 辻 省次

    新潟医学会雑誌   119 ( 11 )   695 - 695   2005.11

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  • アルツハイマー病の疾患感受性遺伝子探索

    宮下 哲典, 武井 教展, 月江 珠緒, 桑野 良三

    新潟医学会雑誌   119 ( 11 )   695 - 695   2005.11

  • 単一遺伝子病とゲノム--テーマ1 脳神経変性疾患(1)アルツハイマー病

    宮下 哲典, 桑野 良三

    ゲノム医学   5 ( 2 )   197 - 203   2005.4

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  • 単一遺伝子病とゲノム 脳神経変性疾患 1.アルツハイマー病

    宮下 哲典, 桑野 良三

    ゲノム医学   5 ( 2 )   197 - 203   2005.4

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  • CARASIL, autosomal recessive vascular dementia with alopecia and spondylosis deformans maps to chromosome 10q

    K Hara, O Onodera, T Fukutake, S Miyano, H Shioda, Y Fujino, Y Shimoe, M Hirayama, T Arisato, S Yanagawa, S Ikeda, A Miyashita, R Kuwano, M Nishizawa, S Tsuji

    ANNALS OF NEUROLOGY   58   S57 - S57   2005

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  • 3 IgA腎症における第6染色体上一塩基多型の解析(第4回新潟ゲノム医学研究会)

    佐藤 文則, 近藤 大介, 成田 一衛, 後藤 眞, 小川 麻, 齋藤 徳子, 坂爪 実, 宮下 哲典, 桑野 良三, 下条 文武

    新潟医学会雑誌   118 ( 12 )   713 - 713   2004.12

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  • IgA腎症における第6染色体上一塩基多型の解析

    佐藤 文則, 近藤 大介, 成田 一衛, 後藤 眞, 小川 麻, 齋藤 徳子, 坂爪 実, 宮下 哲典, 桑野 良三, 下条 文武

    新潟医学会雑誌   118 ( 12 )   713 - 713   2004.12

  • 家族性多系統萎縮症のnon-parametric連鎖解析

    原 賢寿, 小野寺 理, 西澤 正豊, 宮下 哲典, 桑野 良三, 山田 光則, 高橋 均, 登木口 進, 平澤 基之, 水野 美邦, 後藤 順, 辻 省次

    臨床神経学   44 ( 12 )   1193 - 1193   2004.12

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  • Japanese SCA families with an unusual phenotype linked to a locus overlapping with SCA15 locus

    K Hara, T Fukushima, T Suzuki, T Shimohata, M Oyake, H Ishiguro, K Hirota, A Miyashita, R Kuwano, H Kurisaki, H Yomono, J Goto, Kanazawa, I, S Tsuji

    NEUROLOGY   62 ( 4 )   648 - 651   2004.2

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    The authors identified two Japanese spinocerebellar ataxia (SCA) families characterized by postural and action tremor and a very slow progression rate. A genome-wide linkage analysis revealed linkage to chromosome 3p26.1-25.3 with the highest multipoint lod score at D3S3728 (Zmax=3.31 at theta=0.00). The candidate region was 14.7. cM flanked by D3S1620 and D3S3691, which was partly overlapping with the locus of SCA15 characterized by pure cerebellar ataxia. Despite the difference in phenotypes, there remains a possibility that the causative gene for these Japanese SCA is allelic to SCA15.

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  • 孤発性ALSの疾患感受性遺伝子同定のための全ゲノム領域を対象とした関連解析

    福島 隆男, 中野 亮一, 菊川 公紀, 犬塚 貴, 宮下 哲典, 桑野 良三, 辻 省次

    臨床神経学   43 ( 12 )   1084 - 1084   2003.12

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  • 家族性多系統萎縮症の臨床像と連鎖解析

    原 賢寿, 宮下 哲典, 桑野 良三, 柿田 明美, 高橋 均, 登木口 進, 平澤 基之, 水野 美邦, 後藤 順, 辻 省次

    臨床神経学   43 ( 12 )   933 - 933   2003.12

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  • 5 晩発性アルツハイマー型痴呆症の疾患感受性遺伝子(座)同定へ向けて : マイクロサテライトマーカーを用いた試み(I.一般演題,第3回新潟ゲノム医学研究会)

    宮下 哲典, 武井 教典, 月江 珠緒, 桑野 良三

    新潟医学会雑誌   117 ( 10 )   602 - 603   2003.10

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  • 2 IgA腎症における第6染色体上一塩基置換多型の解析(I.一般演題,第3回新潟ゲノム医学研究会)

    近藤 大介, 佐藤 文則, 滝口 純, 宮下 哲典, 後藤 真, 成田 一衛, 桑野 良三, 下条 文武

    新潟医学会雑誌   117 ( 10 )   601 - 601   2003.10

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  • 4 多系統萎縮症(MSA)の疾患遺伝子同定へのアプローチ(I.一般演題,第3回新潟ゲノム医学研究会)

    原 賢寿, 福島 隆男, 下畑 光輝, 寺島 健史, 宮下 哲典, 桑野 良三, 柿田 明美, 高橋 均, 若林 孝一, 登木口 進, 平澤 基之, 水野 美邦, 後藤 順, 辻 省次

    新潟医学会雑誌   117 ( 10 )   602 - 602   2003.10

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  • マイクロサテライト解析による病因遺伝子の網羅的探索 (特集 アルツハイマー病へのゲノムからのアプローチ)

    桑野 良三, 宮下 哲典

    ゲノム医学   3 ( 5 )   523 - 528   2003.10

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  • IgA腎症における第6染色体上一塩基置換多型の解析

    近藤 大介, 佐藤 文則, 滝口 純, 宮下 哲典, 後藤 真, 成田 一衛, 桑野 良三, 下条 文武

    新潟医学会雑誌   117 ( 10 )   601 - 601   2003.10

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    Other Link: http://search.jamas.or.jp/link/ui/2004146880

  • 多系統萎縮症(MSA)の疾患遺伝子同定へのアプローチ

    原 賢寿, 福島 隆男, 下畑 光輝, 寺島 健史, 宮下 哲典, 桑野 良三, 柿田 明美, 高橋 均, 若林 孝一, 登木口 進, 平澤 基之, 水野 美邦, 後藤 順, 辻 省次

    新潟医学会雑誌   117 ( 10 )   602 - 602   2003.10

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    Other Link: http://search.jamas.or.jp/link/ui/2004146882

  • 晩発性アルツハイマー型痴呆症の疾患感受性遺伝子(座)同定へ向けて マイクロサテライトマーカーを用いた試み

    宮下 哲典, 武井 教典, 月江 珠緒, 桑野 良三

    新潟医学会雑誌   117 ( 10 )   602 - 603   2003.10

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    Other Link: http://hdl.handle.net/10191/3700

  • 【アルツハイマー病へのゲノムからのアプローチ】 マイクロサテライト解析による病因遺伝子の網羅的探索

    桑野 良三, 宮下 哲典

    ゲノム医学   3 ( 5 )   523 - 528   2003.10

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  • 神経疾患の分子機構の解明と治療法開発に関する研究 ゲノム多型解析を基盤とする疾患感受性遺伝子の探索と同定

    桑野 良三, 宮下 哲典, 福島 隆男, 中野 亮一, 辻 省次

    厚生労働省精神・神経疾患研究委託費研究報告集   平成14年度   548 - 548   2003.6

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  • 孤発性ALSの全ゲノム領域を対象とした関連解析

    福島 隆男, 中野 亮一, 辻 省次, 菊川 公紀, 犬塚 貴, 宮下 哲典, 桑野 良三

    臨床神経学   42 ( 12 )   1403 - 1403   2002.12

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  • 8 染色体6q22-23領域におけるIgA腎症の疾患関連遺伝子の同定(第2回新潟ゲノム医学研究会)

    後藤 眞, 成田 一衛, 大森 健太郎, 宋 進, 坂爪 実, 斎藤 徳子, 上野 光博, 西 慎一, 下条 文武, 宮下 哲典, 桑野 良三

    新潟医学会雑誌   116 ( 11 )   571 - 571   2002.11

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  • 9 孤発性ALSの全ゲノム領域を対象とした関連解析(第2回新潟ゲノム医学研究会)

    福島 隆男, 中野 亮一, 辻 省次, 菊川 公紀, 犬塚 貴, 宮下 哲典, 桑野 良三

    新潟医学会雑誌   116 ( 11 )   571 - 572   2002.11

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  • 11 これからの大規模連鎖解析 : 遺伝性脊髄小脳変性症の新しい遺伝子座の同定(第2回新潟ゲノム医学研究会)

    原 賢寿, 福島 隆男, 下畑 亨良, 小宅 睦郎, 辻 省次, 廣田 紘一, 宮下 哲典, 桑野 良三, 栗崎 博司, 後藤 順, 金澤 一郎

    新潟医学会雑誌   116 ( 11 )   572 - 572   2002.11

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  • 2 増幅によるゲノムDNAの不死化(第2回新潟ゲノム医学研究会)

    武井 教展, 宮下 哲典, 桑野 良三

    新潟医学会雑誌   116 ( 11 )   569 - 569   2002.11

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  • これからの大規模連鎖解析 遺伝性脊髄小脳変性症の新しい遺伝子座の同定

    原 賢寿, 福島 隆男, 下畑 亨良, 小宅 睦郎, 辻 省次, 廣田 紘一, 宮下 哲典, 桑野 良三, 栗崎 博司, 後藤 順, 金澤 一郎

    新潟医学会雑誌   116 ( 11 )   572 - 572   2002.11

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  • 増幅によるゲノムDNAの不死化

    武井 教展, 宮下 哲典, 桑野 良三

    新潟医学会雑誌   116 ( 11 )   569 - 569   2002.11

  • 染色体6p22-23領域におけるIgA腎症の疾患関連遺伝子の同定

    後藤 眞, 成田 一衛, 大森 健太郎, 宋 進, 坂爪 実, 斎藤 徳子, 上野 光博, 西 慎一, 下条 文武, 宮下 哲典, 桑野 良三

    新潟医学会雑誌   116 ( 11 )   571 - 571   2002.11

  • 孤発性ALSの全ゲノム領域を対象とした関連解析

    福島 隆男, 中野 亮一, 辻 省次, 菊川 公紀, 犬塚 貴, 宮下 哲典, 桑野 良三

    新潟医学会雑誌   116 ( 11 )   571 - 572   2002.11

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    Other Link: http://hdl.handle.net/10191/2738

  • A genome-wide association study of sporadic amyotrophic lateral sclerosis in Japan.

    T Fukushima, R Nakano, K Kikugawa, T Inuzuka, A Miyashita, R Kuwano, S Tsuji

    AMERICAN JOURNAL OF HUMAN GENETICS   71 ( 4 )   468 - 468   2002.10

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  • 脳のゲノム・遺伝子研究の最先端 マイクロサテライト(dinucleotide repeat)の検出法とその応用例

    桑野 良三, 宮下 哲典

    Clinical Neuroscience   20 ( 5 )   502 - 503   2002.5

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  • A novel autosomal dominant cerebellar ataxia linked to choromosome 3p26

    K Hara, T Fukusihima, T Shimohata, M Oyake, H Ishiguro, K Hirota, A Miyashita, R Kuwano, H Kurisaki, J Gotoh, Kanazawa, I, S Tsuji

    NEUROLOGY   58 ( 7 )   A35 - A35   2002.4

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  • 10)疾患遺伝子のゲノム網羅的解析の立ち上げ(一般演題, 新潟ゲノム医学研究会)

    宮下 哲典, 桑野 良三

    新潟医学会雑誌   115 ( 10 )   546 - 547   2001.10

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  • 疾患遺伝子のゲノム網羅的解析の立ち上げ

    宮下 哲典, 桑野 良三

    新潟医学会雑誌   115 ( 10 )   546 - 547   2001.10

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    Other Link: http://hdl.handle.net/10191/48487

  • Disruption of five genes ; eIF4A1, Macrosialin, MSL15, Sox15 and MFXR2, in the GT3-11 gene trap mouse strain

    MIYASHITA Akinori, SHIMIZU Nobuko, ENDO Naoya, HANYUU Takako, ISHII Naoya, ODANI Syoji, KUWANO Ryozo

    日本分子生物学会年会プログラム・講演要旨集   21   608 - 608   1998.12

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  • Analysis of Ankhzn gene identified by gene trap strategy

    ISHII Naoya, ITO Kazuhisa, KURIYAMA Hideyuki, TOMINAGA Kei, MIYASHITA Akinori, MARUYAMA Hirosi, NAITO Makoto, WATANABE Yuichi, KUWANO Ryozo

    日本分子生物学会年会プログラム・講演要旨集   21   303 - 303   1998.12

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  • Molecular characterization and localization of a novel protein, Ankhzn.

    TOMINAGA Kei, KURIYAMA Hideyuki, ISHII Naoya, ITO Kazuhisa, MIYASHITA Akinori, ODANI Shoji, KUWANO Ryozo

    日本分子生物学会年会プログラム・講演要旨集   21   303 - 303   1998.12

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  • Expression and functional analysis of macrosialin gene in the GT3-11 gene trap mouse strain.

    SHIMIZU Nobuko, MIYASHITA Akinori, NAITO Makoto, OHMORI Hitoshi, MORI Masaharu, NAKAJIMA Tamio, KUWANO Ryozo

    日本分子生物学会年会プログラム・講演要旨集   21   590 - 590   1998.12

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  • ジーントラップ法で得られたGT3-11,12系統マウスの解析

    宮下 哲典

    神経化学   35 ( 3 )   690 - 691   1996.9

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    Language:Japanese   Publisher:日本神経化学会  

    CiNii Article

    CiNii Books

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  • ジーントラップ法で得られたGT3-12系統マウスの解析

    斉藤 宏, 宮下 哲典, 白井 学, 伊藤 一寿, 羽入 貴子, 伊藤 康宏, 石井 直也, 里方 一郎, 小谷 昌司, 桑野 良三

    日本分子生物学会年会プログラム・講演要旨集   19   190 - 190   1996.8

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  • ジーントラップ法で得られたGT3-11系統マウスの解析

    宮下 哲典, 白井 学, 斉藤 宏, 伊藤 一寿, 羽入 貴子, 伊藤 康宏, 石井 直也, 里方 一郎, 小谷 昌司, 桑野 良三

    日本分子生物学会年会プログラム・講演要旨集   19   190 - 190   1996.8

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  • ジーントラップ法で得られたGT3-11系統マウスの解析

    宮下 哲典

    生化学   68 ( 7 )   702 - 702   1996.7

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    Language:Japanese   Publisher:(公社)日本生化学会  

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  • A gene trap strategy for identifying the gene expressed in the embryonic nervous system

    M Shirai, A Miyashita, N Ishii, Y Itoh, Satokata, I, YG Watanabe, R Kuwano

    ZOOLOGICAL SCIENCE   13 ( 2 )   277 - 283   1996.4

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    Language:English   Publisher:ZOOLOGICAL SOC JAPAN  

    An efficient gene trap strategy was devised for identifying the genes that are expressed in the mouse developing nervous system. Mouse embryonic stem (ES) cell lines that carried independent integrations of a gene trap vector, pSneolNlacZA, were allowed to differentiate in a suspension culture system. To select cells containing neurons, astrocytes or neuron-glia precursors, cell lines were immunohistochemically examined with antibodies against neuron-specific proteins (neurofilament protein 150 kD and microtubule associated protein 2), glial fibrillary acidic protein or nestin. Three cell clones (GT3-8, 11 and 12) were immunoreactive to either of the antibodies employed and at the same time positive for beta-galactosidase activity. When chimeric embryos were generated by the use of the above 3 cell lines, some cells in their nervous system showed X-gal staining. Thus the major advantage of the present gene trap method lies in its prescreening step of manipulated ES cells prior to generation of chimeric animals. This method holds promise as a useful tool for investigating the genes involved in the development of the nervous system.

    Web of Science

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  • CONSTRUCTION OF THE GENE TRAP VECTOR FOR GENETIC-ANALYSIS OF DEVELOPING BRAIN

    M SHIRAI, Y ITOH, A MIYASHITA, SATOKATA, I, YG WATANABE, R KUWANO

    JOURNAL OF NEUROCHEMISTRY   65   S99 - S99   1995

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    Language:English   Publishing type:Research paper, summary (international conference)   Publisher:LIPPINCOTT-RAVEN PUBL  

    Web of Science

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Presentations

  • Susceptibility Genes for Dementia: Focusing on APOE Invited

    Miyashita Akinori, Hara Norikazu, Obinata Ai, Tsukie Tamao, Hasegawa Mai, Kasuga Kensaku, Ikeuchi Takeshi

    Human Genetics Asia 2023: Symposium 7: Aging and Diseases  2023.10 

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    Event date: 2023.10

    Language:English   Presentation type:Symposium, workshop panel (nominated)  

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  • Single nucleus analysis of human autopsy brains: focus on Alzheimer's disease Invited

    Miyashita Akinori, Tada Mari, Hara Norikazu, Hasegawa Mai, Kikuchi Masataka, Saitoh Yuko, Murayama Shigeo, Kakita Akiyoshi, Ikeuchi Takeshi

    2023.7 

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    Event date: 2023.7

    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

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  • Transcriptome Analysis of Dementia: Insights from Single Nucleus Analysis of Human Autopsy Brains Invited

    Miyashita Akinori, Tada Mari, Hara Norikazu, Hasegawa Mai, Kakita Akiyoshi, Ikeuchi Takeshi

    2022.11 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

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  • Transcriptome Analysis of Human Autopsy Brains Reveals Pathophysiology of Dementia Invited

    Miyashita Akinori, Tada Mari, Hara Norikazu, Hasegawa Mai, Kakita Akiyoshi, Ikeuchi Takeshi

    2022.6 

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    Event date: 2022.6

    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

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  • APOE genotypes and rare missense variants: potential toward clinical applications Invited

    Miyashita Akinori, Hara Norikazu, Kasuga Kensaku, Kikuchi Masatak, Ozaki Koichi, Niida Syunpei, Tada Mari, Kakita Akiyoshi, Ikeuchi Takeshi

    2021.11 

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    Event date: 2021.11

    Language:Japanese  

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  • The amyloid cascade hypothesis: insights from Alzheimer's disease causative and susceptibility genes Invited

    Miyashita Akinori, Hara Norikazu, Kasuga Kensaku, Kikuchi Masatak, Ozaki Koichi, Niida Syunpei, Ikeuchi Takeshi

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    Event date: 2020.11

    Language:Japanese  

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Research Projects

  • Elucidation of novel pathomechanisms specific to brain regions and cell types in tauopathies: a single-cell transcriptome analysis approach

    2021.11 - 2025.3

    Miyashita Akinori

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  • Missense rare variant analysis of APOE: Exploring the link between lipid metabolism and Alzheimer's disease

    Grant number:21K07271

    2021.4 - 2024.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

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    Grant amount:\4030000 ( Direct Cost: \3100000 、 Indirect Cost:\930000 )

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  • Systems pathology approach using deep learning to understand the effect of environmental exposure on the pathogenesis of common diseases

    Grant number:21H03537

    2021.4 - 2024.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

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    Grant amount:\17420000 ( Direct Cost: \13400000 、 Indirect Cost:\4020000 )

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  • 網羅的ゲノム解析とインフォマティクス統合解析による認知症の新規病態解析

    2019.4 - 2022.3

    System name:日本医療研究開発機構研究費:認知症研究開発事業(一次公募)

    Awarding organization:国立研究開発法人日本医療研究開発機構

    池内 健

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    Grant type:Competitive

    Grant amount:\312000000 ( Direct Cost: \105000000 、 Indirect Cost:\31500000 )

    研究分担者(研究分野・主:ゲノム生物学)

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  • 剖検脳・罹患組織を用いたマルチオミックス解析による神経変性タウオパチーの病態解明と創薬標的の同定

    2018.4 - 2021.3

    System name:日本医療研究開発機構研究費:難治性疾患等実用化研究事業・難治性疾患実用化研究事業

    Awarding organization:国立研究開発法人日本医療研究開発機構

    池内 健

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    Grant type:Competitive

    Grant amount:\92040000 ( Direct Cost: \70800000 、 Indirect Cost:\21240000 )

    研究分担者(研究分野・主:神経内科学)

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  • 血液バイオマーカーを用いた認知症と精神・神経疾患の簡易鑑別診断システムの構築

    2017.4 - 2020.3

    System name:日本医療研究開発機構研究費:認知症研究開発事業(一次公募)

    Awarding organization:国立研究開発法人日本医療研究開発機構

    池内 健

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    Grant type:Competitive

    Grant amount:\55000000 ( Direct Cost: \42350000 、 Indirect Cost:\12650000 )

    研究協力者(研究分野・主:神経内科学、研究分野・副:精神神経科学)

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  • Validation study on insulin resistance occuring in brain of Alzheimer disease

    Grant number:15H04839

    2015.4 - 2018.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    Ikeuchi Takeshi, SATO Naoyuki, TEZUKA Toshiyuki, SAITO Kento, MIYASHITA Akinori, HARA Norikazu, TSUKIE Tamao

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    Grant type:Competitive

    Grant amount:\17550000 ( Direct Cost: \13500000 、 Indirect Cost:\4050000 )

    Neumerous epidemiological studies have suggested that type 2 diabetes is a risk factor of Alzheimer's diesase. However, the detailed underlying mechanism has been largely unclear. We previously showed that insulin resistance in central nervous system plays an important role of the pathogenesis of Alzheimer's diesase. In this study, we attempted to validate impaired insulin signal network occuring in brain of Alzheimer's disease by analyzing autopsied samples. By this analysis, we demonstrated that expressions of molecules associated with insulin signal were significantly altered, supporting the notion that insulin resistance is present in human brain of Alzheimer's disease.

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  • Molecular analysis of the differentially expressed miRNA related to progression of Alzheimer's disease

    Grant number:26640122

    2014.4 - 2016.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

    Research category:Grant-in-Aid for Challenging Exploratory Research

    Awarding organization:Japan Society for the Promotion of Science

    Kuwano Ryozo, MIYASHITA Akinori, NAKAYA Akihiro

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    Grant type:Competitive

    Grant amount:\3900000 ( Direct Cost: \3000000 、 Indirect Cost:\900000 )

    Alzheimer’s disease (AD) is progressive neurodegenerative disorder characterized by two major pathological changes in expansion of senile plaques (SP) and neurofibrillary tangles (NFT) in the brain. Autopsy brains were diagnosed based on the degree of these two pathological findings defined by the Braak stage (SP: 0, A, B, and C, and NFT:0, I, II, III, IV, V and VI). We analyzed non-coding small RNA, especially miRNA, in the exosome as a candidate molecule of propagation of pathological lesion. Total RNA was isolated from three brain regions (entorhinal cortex, temporal cortex and frontal cortex) at several Braak stages. Over 20,000,000 single reads in each sample was determined by the next generation sequencing and statistically analyzed. We found differentially expressed miRNAs in the course of expansion of pathological lesion in each brain region.

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  • Copy number variation database of Alzheimer's disease for genome analysis

    Grant number:25430181

    2013.4 - 2016.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    Nakaya Akihiro, KUWANO Ryozo, MIYASHITA Akinori

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    Grant type:Competitive

    Grant amount:\5460000 ( Direct Cost: \4200000 、 Indirect Cost:\1260000 )

    We developed a comprehensive database (AD/GD CNVdb) that comprises genome-wide copy number variations (CNVs) in more than 2,000 unrelated Japanese subjects including patients of Alzheimer’s disease (AD). Besides the healthy controls (N=1,000), it contains diseased subjects categorized into two types, EOAD (early-onset AD, N=300) and LOAD (late-onset AD, N=1,000). All the subjects were analyzed by the Affymetrix SNP 6.0 Array to identify CNVs, and the raw intensity data at more than 1.8 million markers were converted into the actual copy number states. In each subject group, we evaluated rates of CNVs (gain and loss) at the markers, and extracted the CNV regions where the continuous markers indicate rates of CNVs higher than a threshold along the genome sequence. We then conducted case-control studies among the subject groups using the CNV regions, and visualized the results to elucidate the relationships between the structural variations and the disease.

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  • Identification of target molecules related the progression of Alzheimer's disease

    Grant number:24310144

    2012.4 - 2015.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    KUWANO Ryozo, IKEUCHI Takeshi, MIYASHITA Akinori, NAKAYA Akihiro

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    Grant type:Competitive

    Grant amount:\21060000 ( Direct Cost: \16200000 、 Indirect Cost:\4860000 )

    Major neuropathological features of Alzheimer’s disease are senile plaques and neurofibrillary tangles .To identify genes relevant to neuropathological expansion defined by the Braak stage, we conducted whole-genome exon array analysis with 213 human postmortem brain tissues from the entorhinal, temporal and frontal cortices of 71 brain-donor subjects. We identified eight mRNAs and 5 non-coding RNAs associated with the progression of the characteristic lesion of Alzheimer’ disease brain diagnosed by Braak stage.We hypothesized that the phenotype-associated SNPs may spatially contact with distal genomic loci and may lead to regulate the gene expression. To analyze the relationship between the gene expression profiles by exon array and the higher-order chromatin structure data, we used the tethered conformation capture (TCC) method in the human neuroblastoma cell line, SK-N-SH, and the glioma cell line, U-251MG.

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  • chromosome conformation capture variant technique for disease risk genomic loci

    Grant number:24651221

    2012.4 - 2014.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

    Research category:Grant-in-Aid for Challenging Exploratory Research

    Awarding organization:Japan Society for the Promotion of Science

    HASEGAWA Mai, KUWANO Ryozo, NAKAYA Akihiro, MIYASHITA Akinori

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    Grant type:Competitive

    Grant amount:\4030000 ( Direct Cost: \3100000 、 Indirect Cost:\930000 )

    Recent case-control genome-wide association studies (GWAS) have identified numerous single nucleotide polymorphisms (SNPs) which act as genetic risk factor, but most of SNPs which located on non-coding region are still unknown for their function. Since such SNP is predicted to act as a distal enhancer of responsible gene, we have developed a chromosome conformation capture method suitable for post-GWAS analysis. We demonstrated that tethered conformation capture (a comprehensive chromatin conformation capture method) and following pulldown using biotinylated RNA probe which is targeted to risk SNP region can detect spatially proximate genomic loci efficiently.

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  • 末梢血におけるアルツハイマー病脳関連遺伝子のエピジェネティック・遺伝子発現解析

    Grant number:24510275

    2012.4 - 2014.3

    System name:科学研究費助成事業 基盤研究(C)

    Research category:基盤研究(C)

    Awarding organization:日本学術振興会

    宮下 哲典, 池内 健

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\5460000 ( Direct Cost: \4200000 、 Indirect Cost:\1260000 )

    ヒト脳疾患の進展を末梢血のエピゲノムやトランスクリプトームの変化として捉えられるか?本研究プロジェクトではアルツハイマ ー病(AD)の抹消血に着目し、特定遺伝子のエピジェネティックな変化と遺伝子発現の変動を調べることを目的とする。これまでに行ったヒト死後脳の遺伝子発現データを用いて、ADに特徴的な脳病変である「神経原線維変化(NFT)」の進展と関連する遺伝子群を同定する。その中から遺伝子を選抜し、DNAのシトシンメチル化レベル(5-mC)と遺伝子発現レベルを解析する。ADの進行が末梢血の変化に反映されていれば、侵襲度の低いバイオマーカーとしての可能性が期待でき、研究の更なる展開につながると考えられる 。
    平成25年度はヒト死後脳(村山繁雄博士提供)の嗅内野、側頭葉、前頭葉に由来する全RNAを用いたエクソンアレイデータ(Affymetrix社)から、NFTの進展(Braak NFTステージ分類)と関連するNFT関連遺伝子を同定し論文化した(印刷中)。一部のNFT関連遺伝子についてはTaqMan法による定量的リア ルタイムPCR(qPCR)によって再現性を確認した。各遺伝子の機能や末梢血での発現量をデータベースで検索し、精査した 上でさらに遺伝子を絞り込み、本研究プロジェクトの解析対象遺伝子として限定した(宮下・中谷・桑野・池内)。臨床被検体のリクルート は新潟大学病院の物忘れ外来で実施し、採血はインフォームド・コンセントを経て行った(池内)。その際、統計解析に必要な臨床情報(認知機能テスト情報など)も合わせて取得した(池内)。血液から全RNAを抽出し、qPCRによって遺伝子発現量を定量した(宮下)。NFT関連遺伝子として同定された遺伝子は末梢血で発現しているのか?脳と末梢血の間で遺伝子発現量に相関はあるか?また、エピジェネティックな変化はどうか?などが今後の解析課題である。

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  • Personal genome analysis on Alzheimer's disease

    Grant number:22129004

    2010.4 - 2015.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Research category:Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Awarding organization:Japan Society for the Promotion of Science

    KUWANO Ryozo, KAKITA Akiyoshi, MIYASHITA Akinori

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    Grant type:Competitive

    Grant amount:\125840000 ( Direct Cost: \96800000 、 Indirect Cost:\29040000 )

    Twin studies and λs (=5.0) of Alzheimer’s disease indicate that genetic risk factors are thought to contribute the development and progression. SNP-based genome-wide association studies have been intensively done. As the most of risk SNPs identified are only small effect on the disease, the family-based genome analysis has been re-evaluated. The next generation sequencing proved to be a new powerful tool to determine rare variants in patents with family history. In addition to genome sequencing, we performed gene expression analysis of human brains diagnosed as to senile plaques and neurofibrillary tangles by the exon-array and next generation sequencing. It should be innovated the possible mechanism that gene expression is regulated by a gene-gene cluster between distal regions on the same chromosome or on a different chromosome, and alternatively by non-coding RNA including microRNA.

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  • Identification and expression analysis of genes controlled by a Alzheimer's disease susceptibility region including APOE

    2010.4 - 2012.3

    Miyashita Akinori

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\4030000 ( Direct Cost: \3100000 、 Indirect Cost:\930000 )

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  • Identification and expression analysis of genes controlled by a Alzheimer's disease susceptibility region including APOE

    Grant number:22790331

    2010 - 2011

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)

    Research category:Grant-in-Aid for Young Scientists (B)

    Awarding organization:Japan Society for the Promotion of Science

    MIYASHITA Akinori

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    Grant amount:\4030000 ( Direct Cost: \3100000 、 Indirect Cost:\930000 )

    Alzheimer's disease(AD) is the most common form of dementia in the elderly. Molecular mechanisms underlying the progression of AD neuropathological hallmarkes, senile plaques(SP) and neurofibrillary tangles(NFT), in the brain remains to be resolved. To identify genes associated with Braak SP-NFT stage criteria, we conducted a genome-wide gene expression analysis. Postmortem brain tissues from 71 brain donor subjects were used. Genomic DNAs were prepared from the frontal cortices for APOE genotyping as well as whole-genome single nucleotide polymorphisms and copy number variation genotyping. Total RNAs were isolated, and then used for expression profiling of whole-exon transcripts. Seventy-one brain donors were grouped into several groups according to Braak SP-NFT stages, and expression levels of each gene were compared in view of APOE genotypes. We found that more than 10 genes were significantly associated with Braak SP-NFT stage criteria

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  • Statistical genetics for designing multistage genome-wide association studies to detect genetic risk factors

    2007.4 - 2009.3

    Akazawa Kohei

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    Grant type:Competitive

    Grant amount:\11700000 ( Direct Cost: \9000000 、 Indirect Cost:\2700000 )

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  • Statistical genetics for designing multistage genome-wide association studies to detect genetic risk factors

    Grant number:19300095

    2007 - 2008

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    AKAZAWA Kohei, TOYABE Shin-ichi, KUWANO Ryozo, MIYASHITA Akinori

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    Grant amount:\11700000 ( Direct Cost: \9000000 、 Indirect Cost:\2700000 )

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  • Genotyping and its use for brain diseases

    2005.4 - 2010.3

    Kuwano Ryozo

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    Grant type:Competitive

    Grant amount:\181300000 ( Direct Cost: \181300000 )

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  • アルツハイマー病の疾患感受性遺伝子探索

    2005 - 2009

    System name:科学研究費補助金

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    Grant type:Competitive

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  • Genotyping and its use for brain diseases

    Grant number:17020004

    2005 - 2009

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Priority Areas

    Research category:Grant-in-Aid for Scientific Research on Priority Areas

    Awarding organization:Japan Society for the Promotion of Science

    KUWANO Ryozo, MIYASHITA Akinori

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    Grant amount:\181300000 ( Direct Cost: \181300000 )

    The goal of this project is to establish the genotyping system and its use for brain diseases. We supported microsatellite and SNP typing for sib pair analysis and linkage studies on familiar brain diseases such as Alzheimer disease and related neurodegenerative disorders. We identified susceptibility loci associated with late-onset Alzheimer disease by a large-scale genome-wide association study.

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  • アルツハイマー病診断・治療薬の開発:βアミロイド結合分子探索からのアプローチ

    Grant number:16650081

    2004 - 2006

    System name:科学研究費助成事業 萌芽研究

    Research category:萌芽研究

    Awarding organization:日本学術振興会

    橘 正芳, 宮下 哲典, 野中 裕美

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    Grant type:Competitive

    Grant amount:\2300000 ( Direct Cost: \2300000 )

    アルツハイマー病は、我が国においても近年増加の傾向をたどり大きな社会問題となっている。アルツハイマー病の原因物質はアミロイドベーターであることが明らかになってきたが、本研究の最終的な目的はアミロイドベーターに結合する化合物を創出してアルツハイマー病の早期診断ひいては治療に役立つ物質を創出しようとするものである。本研究はその第一歩としてアミロイドベーターと小分子の結合をとらえるシステムの開発を試みた。
    独自に開発したElectro spray deposition(ESD)装置(フューエンス社)を用い、アミロイドベーター1-42(BACHEM社 H-1368)を高電圧負荷時に発生する静電力を利用してマイクロフィルムに噴出し一定の強度をもつ膜を作製した。次にこの膜をアミロイドベーターの凝集に関与するとされている亜鉛2価イオンと作用させ、フューエンス社と共同開発したメカノケミカル(MC1型)装置(フューエンス社、橘で共同特許申請中)に装着し膜の張力の増加や減弱を検討した。その結果、アミロイドベーターと亜鉛2価イオンを結合させるアミロイドベーター膜の張力が増加することが判明した。さらにアミロイドベーター結合性のRNAアプタマーを作製し、これを併用して作用させるとこの亜鉛によるアミロイドベーター膜張力の増強の程度が減じることが証明された。すなわちこのアプタマーとアミロイドベーターとの結合がin vitroで証明された。今後培養系およびマウスを用いてアミロイドベーター結合性分子とアミロイドベーターとの分子間作用を検討している。

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  • Identification of immature cells in the adult mouse brain

    2002.4 - 2005.3

    Kuwano Ryozo

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    Grant type:Competitive

    Grant amount:\15100000 ( Direct Cost: \15100000 )

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  • アンチセンス転写で形質発現に破綻をきたすダブルジーントラップマウスの開発

    2002.4 - 2004.3

    System name:科学研究費補助金:萌芽研究

    桑野 良三

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    Grant type:Competitive

    Grant amount:\3400000 ( Direct Cost: \3400000 )

    研究分担者(研究分野:実験動物学)

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  • Identification of immature cells in the adult mouse brain

    Grant number:14380357

    2002 - 2004

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    KUWANO Ryozo, MIYASHITA Akinori

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    Grant amount:\15100000 ( Direct Cost: \15100000 )

    It is important to find molecules that express transiently in the early developmental stage to understand neuronal plasticity in the adult brain. We focused on a nerve growth cone involved in neurogenesis between the embryo and the early postnatal period. A membrane protein gmp46 (growth cone membrane protein with a molecular mass of 46 kDa) was isolated from the nerve growth cone-enriched fraction of newborn mouse brains. Gmp46 belongs to a member of the immunoglobulin super family and functions as an adhesion molecule. The gmp46 cDNA sequence was identical to the mouse homologue of the human coxsackievirus and adenovirus receptor (CAR). Gmp46/CAR, but not as the virus receptor, functions physiologically in neurogenesis events such as fasciculation of neuritis, axonal guidance, and recognition of the target cell as an adhesion molecule. By using a yeast two-hybrid screen to identify gmp46/CAR interacting protein via the PDZ domain at the C-terminal, we cloned PSD95 as a gmp46/CAR binding partner. The intracellular protein interactions appear to regulate a dynamic motility in neurogenesis. Western and northern blot analyses revealed that gmp46/CAR expressed predominantly in the nervous system and the highest level was observed in the newborn mouse brain followed by rapid decrease after birth. An abundant expression of gmp46/CAR was detected in the neuroepithelium of the neural tube in the embryos and the developing brain by immunohistochemical analysis. Then the expression of gmp46/CAR in these areas decreased and was barely detectable over postnatal 21 days. However, we found gmp46/CAR expression over 1 month in the dentate gyrus and the subventricular zone, where a few cells are proliferating. Based on our findings, we propose that gmp46/CAR transiently expresses in immature cells and plays a role on neuronetwork formations not only in embryo but also in adult brain.

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  • アンチセンス転写で形質発現に破綻をきたすダブルジーントラップマウスの開発

    Grant number:14658271

    2002 - 2003

    System name:科学研究費助成事業 萌芽研究

    Research category:萌芽研究

    Awarding organization:日本学術振興会

    桑野 良三, 宮下 哲典

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    Grant amount:\3400000 ( Direct Cost: \3400000 )

    [ジーントラップ系統マウスGT3-11の再作出]
    既報のジーントラップ系統マウスGT3-11(Zoolog Sci.,1996,13:277-283)の生殖系列キメラマウスを複数匹得るために、GT3-11 ES細胞(129系統マウス由来)を用いて再作出を試みした。この系統ではジーントラップベクター(GTV)挿入部位において、その上流に位置するEif4al遺伝子と下流に位置するFxr2h遺伝子から、収束性の転写(センス-アンチセンス転写)が認められている(Gene,1999,237:53-60;第25回日本分子生物学会,プログラム・講演要旨集,P679,2002)。従って、この系統マウスは本研究プロジェクトのモデルマウスと位置付けることができると考えられ、再作出により上記収束性転写の再現性が確認できると思われる。
    その結果、GT3-11ES細胞を注入した118個の胚盤胞をICR (CRJ Inc.)偽妊娠マウスに移植し、28匹のキメラマウス(♂:♀:21:7)を得た。C57BL/6J (CRJ Inc.)と交配し、生殖系列キメラマウスと確認されたものは8匹(♂:♀=7:1)であった。そのうち高率な生殖系列キメラマウス4匹.(全て♂)をC57BL/6J♀と交配し、得られた胎児を用いて以下の実験を遂行し、今現在解析を進めている。
    1)RT-PCR法
    2)ノーザン法
    3)X-ga1染色
    4)胎齢13.5日胚由来初代線維芽細胞を用いたネオマイシン耐性実験

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  • マウス胚性幹細胞を用いたジーントラップ法によるゲノム欠失型疾患モデルマウスの作出

    2001.4 - 2003.3

    System name:科学研究費補助金:若手研究(B)

    宮下 哲典

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\2200000 ( Direct Cost: \2200000 )

    研究代表者(研究分野:実験動物学)

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  • マウス胚性幹細胞を用いたジーントラップ法によるゲノム欠失型疾患モデルマウスの作出

    Grant number:13780660

    2001 - 2002

    System name:科学研究費助成事業 若手研究(B)

    Research category:若手研究(B)

    Awarding organization:日本学術振興会

    宮下 哲典

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    Grant amount:\2200000 ( Direct Cost: \2200000 )

    新規ジーントラップベクターの構築と機能確認
    マウス胚性幹(ES)細胞ゲノムに欠失(数kb〜数百kb)を引き起こすための新規ジーントラップベクターを4種類構築した(GT-a、-b、-c、-d)。レポーター遺伝子としてはLacZとEGFPを用い、薬剤耐性遺伝子としてはネオマイシン耐性遺伝子neoとハイグロマイシン耐性遺伝子Hygを用いた。Neo-LacZでセンス転写ユニット(IRESを介したdicistron)を成し、Hyg-EGFP(融合遺伝子)でアンチセンス転写ユニットを構成している。本研究では、シングルジーントラップのみならず、ダブルジーントラップも想定している。従って、上記4種類のベクターの1つ『GT-a』にはneo-LacZユニットとHyg-EGFPユニットのどちらにもプロモーターを付していない。『GT-b』〜『GT-d』は『GT-a』のコントロールベクターである。『GT-b』と『GT-c』については片方のユニットそれぞれにプロモーターを付けてあり、『GT-d』にはどちらのユニットにもプロモーターを付けてある。
    マウスES細胞へ遺伝子導入する前に、構築したベクターが細胞内できちんと機能するかどうかを調べるための実験を行った。ラットアストログリオーマ由来のC6細胞に、リポフェクション法によって一過性及び永久的にそれぞれ遺伝子導入した。その結果、『GT-b』『GT-c』のベクターを用いた実験から、センス及びアンチセンス転写ユニットはどちらも機能的であることが分かった。また、『GT-d』を用いた実験から、両ユニットが各プロモーターでダブルドライブされた場合にもセンス-アンチセンス転写ユニットは同時に独立して機能することが分かった。また、ノーザン解析、鎖特異的RT-PCR解析によっても、両ユニットの適切な転写を確認した。
    従って、本研究の遂行に必要なベクターの構築が確認され、レポーター遺伝子(LacZ、EGFP)や薬剤耐性遺伝子(neo、Hyg)が機能することが分かった。これらベクターを用いて実際にES細胞に遺伝子導入し、ゲノム欠失を伴った細胞株の樹立を目指す。

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  • Genome-Wide Approach of Neuronal Degenerative Disorder

    2000 - 2005

    System name:Millennium Project

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    Grant type:Competitive

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  • 神経疾患のゲノム網羅的な解析

    2000 - 2005

    System name:ミレニアム・プロジェクト

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    Grant type:Competitive

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Teaching Experience

  • 病気と遺伝学

    2018
    -
    2022
    Institution name:新潟大学

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    Level:Undergraduate (specialized)  Country:Japan