2021/12/04 更新

写真a

イワクラ ユリコ
岩倉 百合子
IWAKURA Yuriko
所属
脳研究所 助教
職名
助教
外部リンク

学位

  • 博士(医学) ( 2004年3月   新潟大学 )

研究キーワード

  • グルタミン酸

  • 上皮成長因子

  • ニューレグリン

  • 神経栄養因子

  • モノアミン

研究分野

  • ライフサイエンス / 神経科学一般

  • ライフサイエンス / 神経科学一般

  • ライフサイエンス / 神経科学一般

経歴(researchmap)

  • 新潟大学   脳研究所 基礎神経科学部門   助教

    2007年2月 - 現在

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  • ニューヨーク大学スカボール研究所分子神経生物学分野   研究員

    2005年4月 - 2007年1月

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  • 新潟大学脳研究所分子神経生物学分野   Brain Research Institute   日本学術振興会特別研究員

    2003年4月 - 2005年3月

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経歴

  • 新潟大学   脳研究所 基礎神経科学部門   助教

    2007年2月 - 現在

学歴

  • 新潟大学   医学研究科   生理系(分子神経生物学)

    - 2004年3月

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    国名: 日本国

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所属学協会

委員歴

  • 日本神経科学学会   ダイバーシティ推進委員  

    2017年5月 - 2019年5月   

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    団体区分:学協会

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  • 日本神経化学会   評議員  

    2013年 - 現在   

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    団体区分:学協会

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論文

  • Inter-breeder differences in prepulse inhibition deficits of C57BL/6J mice in a maternal infection model for schizophrenia

    Yutaro Kobayashi, Hiroyoshi Inaba, Yuriko Iwakura, Hisaaki Namba, Hidekazu Sotoyama, Yui Murata, Kazuya Iwamoto, Hiroyuki Nawa

    2020年12月

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    出版者・発行元:Cold Spring Harbor Laboratory  

    <title>ABSTRACT</title>Genetic and environmental factors interact with each other to influence the risk of various psychiatric diseases; however, the intensity and nature of their interactions remain to be elucidated. We used a maternal infection model using polyinosinic-polycytidylic acid (Poly(I:C)) to determine the relationship between the maternal breeding environment and behavioral changes in the offspring. We purchased pregnant C57BL/6J mice from three breeders and administered Poly(I:C) (2 mg/kg) intravenously in their tail vein on gestation day 15. The offspring were raised to 8-12 weeks old and subjected to the acoustic startle tests to measure their startle response intensity, prepulse inhibition levels, and degree of the adaptation of the startle response. No statistical interaction between Poly(I:C) administration and sex was observed for prepulse inhibition; thus, male and female mice were analyzed together. The Poly(I:C) challenge significantly decreased prepulse inhibition levels of the offspring born to the pregnant dams from Breeder A but not those from the other breeders. However, there were no significant inter-breeder differences in Poly(I:C) effects on startle response and on startle adaptation. The rearing environment of mouse dams has a prominent impact on the Poly(I:C)-induced prepulse inhibition deficits in this maternal infection model.

    DOI: 10.1101/2020.12.24.423890

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  • Clozapine-dependent inhibition of EGF/neuregulin receptor (ErbB) kinases. 査読

    Kobayashi Y, Iwakura Y, Sotoyama H, Kitayama E, Takei N, Someya T, Nawa H

    Translational psychiatry   9 ( 1 )   181   2019年8月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1038/s41398-019-0519-1

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    その他リンク: http://www.nature.com/articles/s41398-019-0519-1

  • USP10 is a critical factor for Tau-positive stress granule formation in neuronal cells. 査読 国際誌

    Piatnitskaia S, Takahashi M, Kitaura H, Katsuragi Y, Kakihana T, Zhang L, Kakita A, Iwakura Y, Nawa H, Miura T, Ikeuchi T, Hara T, Fujii M

    Scientific reports   9 ( 1 )   10591 - 10591   2019年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1038/s41598-019-47033-7

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  • 統合失調症患者における脳内コンドロイチン硫酸鎖の変化

    湯川 尊行, 岩倉 百合子, 武井 延之, 斎藤 摩美, 渡部 雄一郎, 豊岡 和彦, 五十嵐 道弘, 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, 入谷 修司, 丹羽 真一, 竹内 亮子, 高橋 均, 柿田 明美, 染矢 俊幸, 那波 宏之

    精神神経学雑誌   ( 2019特別号 )   S410 - S410   2019年6月

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    記述言語:日本語   出版者・発行元:(公社)日本精神神経学会  

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  • Pathological alterations of chondroitin sulfate moiety in postmortem hippocampus of patients with schizophrenia. 査読 国際誌

    Yukawa T, Iwakura Y, Takei N, Saito M, Watanabe Y, Toyooka K, Igarashi M, Niizato K, Oshima K, Kunii Y, Yabe H, Matsumoto J, Wada A, Hino M, Iritani S, Niwa SI, Takeuchi R, Takahashi H, Kakita A, Someya T, Nawa H

    Psychiatry research   270   940 - 946   2018年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.psychres.2018.10.062

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  • USP10 Is a Driver of Ubiquitinated Protein Aggregation and Aggresome Formation to Inhibit Apoptosis. 査読 国際誌

    Takahashi M, Kitaura H, Kakita A, Kakihana T, Katsuragi Y, Nameta M, Zhang L, Iwakura Y, Nawa H, Higuchi M, Komatsu M, Fujii M

    iScience   9   433 - 450   2018年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.isci.2018.11.006

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  • Epidermal growth factor signals attenuate phenotypic and functional development of neocortical GABA neurons 査読

    Hisaaki Namba, Tadasato Nagano, Eiichi Jodo, Satoshi Eifuku, Masao Horie, Hirohide Takebayashi, Yuriko Iwakura, Hidekazu Sotoyama, Nobuyuki Takei, Hiroyuki Nawa

    Journal of Neurochemistry   142 ( 6 )   886 - 900   2017年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Blackwell Publishing Ltd  

    Phenotypic development of neocortical GABA neurons is highly plastic and promoted by various neurotrophic factors such as neuregulin-1. A subpopulation of GABA neurons expresses not only neuregulin receptor (ErbB4) but also epidermal growth factor (EGF) receptor (ErbB1) during development, but the neurobiological action of EGF on this cell population is less understood than that of neuregulin-1. Here, we examined the effects of exogenous EGF on immature GABA neurons both in culture and in vivo and also explored physiological consequences in adults. We prepared low density cultures from the neocortex of rat embryos and treated neocortical neurons with EGF. EGF decreased protein levels of glutamic acid decarboxylases (GAD65 and GAD67), and EGF influences on neuronal survival and glial proliferation were negligible or limited. The EGF treatment also diminished the frequency of miniature inhibitory postsynaptic currents (mIPSCs). In vivo administration of EGF to mouse pups reproduced the above GABAergic phenomena in neocortical culture. In EGF-injected postnatal mice, GAD- and parvalbumin-immunoreactivities were reduced in the frontal cortex. In addition, postnatal EGF treatment decreased mIPSC frequency in, and the density of, GABAergic terminals on pyramidal cells. Although these phenotypic influences on GABA neurons became less marked during development, it later resulted in the reduced β- and γ-powers of sound-evoked electroencephalogram in adults, which is regulated by parvalbumin-positive GABA neurons and implicated in the schizophrenia pathophysiology. These findings suggest that, in contrast to the ErbB4 ligand of neuregulin-1, the ErbB1 ligand of EGF exerts unique maturation-attenuating influences on developing cortical GABAergic neurons. (Figure presented.).

    DOI: 10.1111/jnc.14097

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  • Epidermal growth factor singals attenuate phenotypic and functional development of neocortical GABA neurons 査読

    Hisaaki Namba, Tadasato Nagano, Eiichi Jodo, Satoshi Eifuku, Masao Horie, Hirohide Takebayashi, Yuriko Iwakura, Hidekazu Sotoyama, Nobuyuki Takei, Hiroyuki Nawa

    JOURNAL OF NEUROCHEMISTRY   142 ( 6 )   886 - 900   2017年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY  

    Phenotypic development of neocortical GABA neurons is highly plastic and promoted by various neurotrophic factors such as neuregulin-1. A subpopulation of GABA neurons expresses not only neuregulin receptor (ErbB4) but also epidermal growth factor (EGF) receptor (ErbB1) during development, but the neurobiological action of EGF on this cell population is less understood than that of neuregulin-1. Here, we examined the effects of exogenous EGF on immature GABA neurons both in culture and in vivo and also explored physiological consequences in adults. We prepared low density cultures from the neocortex of rat embryos and treated neocortical neurons with EGF. EGF decreased protein levels of glutamic acid decar-boxylases (GAD65 and GAD67), and EGF influences on neuronal survival and glial proliferation were negligible or limited. The EGF treatment also diminished the frequency of miniature inhibitory postsynaptic currents (mIPSCs). In vivo administration of EGF to mouse pups reproduced the above GABAergic phenomena in neocortical culture. In EGF-injected postnatal mice, GAD- and parvalbumin-immunoreactivities were reduced in the frontal cortex. In addition, postnatal EGF treatment decreased mIPSC frequency in, and the density of, GABAergic terminals on pyramidal cells. Although these phenotypic influences on GABA neurons became less marked during development, it later resulted in the reduced beta- and gamma-powers of sound-evoked electroencephalogram in adults, which is regulated by parvalbumin-positive GABA neurons and implicated in the schizophrenia pathophysiology. These findings suggest that, in contrast to the ErbB4 ligand of neuregulin-1, the ErbB1 ligand of EGF exerts unique maturation-attenuating influences on developing cortical GABAergic neurons.

    DOI: 10.1111/jnc.14097

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  • Striatal hypodopamine phenotypes found in transgenic mice that overexpress glial cell line-derived neurotrophic factor 査読

    Hidekazu Sotoyama, Yuriko Iwakura, Kanako Oda, Toshikuni Sasaoka, Nobuyuki Takei, Akiyoshi Kakita, Hideki Enomoto, Hiroyuki Nawa

    NEUROSCIENCE LETTERS   654 ( 654 )   99 - 106   2017年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER IRELAND LTD  

    Glial cell line-derived neurotrophic factor (GDNF) positively regulates the development and maintenance of in vitro dopaminergic neurons. However, the in vivo influences of GDNF signals on the brain dopamine system are controversial and not fully defined. To address this question, we analyzed dopaminergic phenotypes of the transgenic mice that overexpress GDNF under the control of the glial Gfap promoter. Compared with wild-type, the GDNF transgenic mice contained higher levels of GDNF protein and phosphorylated RET receptors in the brain. However, there were reductions in the levels of tyrosine hydroxylase (TH), dopamine, and its metabolite homovanillic acid in the striatum of transgenic mice. The TH reduction appeared to occur during postnatal development. Immunohistochemistry revealed that striatal TH density was reduced in transgenic mice with no apparent signs of neurodegeneration. In agreement with these neurochemical traits, basal levels of extracellular dopamine and high K+-induced dopamine efflux were decreased in the striatum of transgenic mice. We also explored the influences of GDNF overexpression on lomomotor behavior. GDNF transgenic mice exhibited lower stereotypy and rearing in a novel environment compared with wild-type mice. These results suggest that chronic overexpression of GDNF in brain astrocytes exerts an opposing influence on nigrostriatal dopamine metabolism and neurotransmission. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.neulet.2017.06.005

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  • Advanced Glycation End Products Induce Brain-Derived Neurotrophic Factor Release from Human Platelets through the Src Family Kinases Activation 査読

    Furukawa Kazuo, Fuse Ichiro, Iwakura Yuriko, Sotoyama Hidekazu, Hanyu Osamu, Nawa Hiroyuki, Takei Nobuyuki, Sone Hirohito

    DIABETES   66   A123   2017年6月

  • Glutamate-dependent ectodomain shedding of neuregulin-1 type II precursors in rat forebrain neurons 査読

    Yuriko Iwakura, Ran Wang, Naoko Inamura, Kazuaki Araki, Shigeki Higashiyama, Nobuyuki Takei, Hiroyuki Nawa

    PLOS ONE   12 ( 3 )   2017年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:PUBLIC LIBRARY SCIENCE  

    The neurotrophic factor neuregulin 1 (NRG1) regulates neuronal development, glial differentiation, and excitatory synapse maturation. NRG1 is synthesized as a membrane-anchored precursor and is then liberated by proteolytic processing or exocytosis. Mature NRG1 then binds to its receptors expressed by neighboring neurons or glial cells. However, the molecular mechanisms that govern this process in the nervous system are not defined in detail. Here we prepared neuron-enriched and glia-enriched cultures from embryonic rat neocortex to investigate the role of neurotransmitters that regulate the liberation/release of NRG1 from the membrane of neurons or glial cells. Using a two-site enzyme immunoassay to detect soluble NRG1, we show that, of various neurotransmitters, glutamate was the most potent inducer of NRG1 release in neuron-enriched cultures. NRG1 release in glia-enriched cultures was relatively limited. Furthermore, among glutamate receptor agonists, N-Methyl-DAspartate (NMDA) and kainate (KA), but not AMPA or tACPD, mimicked the effects of glutamate. Similar findings were acquired from analysis of the hippocampus of rats with KAinduced seizures. To evaluate the contribution of members of a disintegrin and metalloproteinase (ADAM) families to NRG1 release, we transfected primary cultures of neurons with cDNA vectors encoding NRG1 types I, II, or III precursors, each tagged with the alkaline phosphatase reporter. Analysis of alkaline phosphatase activity revealed that the NRG1 type II precursor was subjected to tumor necrosis factor-a-converting enzyme (TACE) / a Disintegrin And Metalloproteinase 17 (ADAM17)-dependent ectodomain shedding in a protein kinase C-dependent manner. These results suggest that glutamatergic neurotransmission positively regulates the ectodomain shedding of NRG1 type II precursors and liberates the active NRG1 domain in an activity-dependent manner.

    DOI: 10.1371/journal.pone.0174780

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  • Advanced glycation end products induce brain-derived neurotrophic factor release from human platelets through the Src-family kinase activation 査読

    Kazuo Furukawa, Ichiro Fuse, Yuriko Iwakura, Hidekazu Sotoyama, Osamu Hanyu, Hiroyuki Nawa, Hirohito Sone, Nobuyuki Takei

    CARDIOVASCULAR DIABETOLOGY   16 ( 1 )   20   2017年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:BIOMED CENTRAL LTD  

    Background: Brain-derived neurotrophic factor (BDNF) exerts beneficial effects not only on diabetic neuropathies but also on cardiovascular injury. There is argument regarding the levels of serum BDNF in patients with diabetes mellitus (DM). Because BDNF in peripheral blood is rich in platelets, this may represent dysregulation of BDNF release from platelets. Here we focused on advanced glycation end products (AGEs), which are elevated in patients with DM and have adverse effects on cardiovascular functions. The aim of this study is to elucidate the role of AGEs in the regulation of BDNF release from human platelets.
    Methods: Platelets collected from peripheral blood of healthy volunteers were incubated with various concentrations of AGE (glycated-BSA) at 37 degrees C for 5 min with or without BAPTA-AM, a cell permeable Ca2+ chelator, or PP2, a potent inhibitor of Src family kinases (SFKs). Released and cellular BDNF were measured by ELISA and calculated. Phosphorylation of Src and Syk, a downstream kinase of SFKs, in stimulated platelets was examined by Western blotting and immunoprecipitation.
    Results: AGE induced BDNF release from human platelets in a dose- dependent manner, which was dependent on intracellular Ca2+ and SFKs. We found that AGE induced phosphorylation of Src and Syk.
    Conclusions: AGE induces BDNF release from human platelets through the activation of the Src- Syk-(possibly phospholipase C)-Ca2+ pathway. Considering the toxic action of AGEs and the protective roles of BDNF, it can be hypothesized that AGE-induced BDNF release is a biological defense system in the early phase of diabetes. Chronic elevation of AGEs may induce depletion or downregulation of BDNF in platelets during the progression of DM.

    DOI: 10.1186/s12933-017-0505-y

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  • Level of plasma neuregulin-1 SMDF is reduced in patients with idiopathic Parkinson's disease 査読

    Yuka Hama, Ichiro Yabe, Koichi Wakabayashi, Takahiro Kano, Makoto Hirotani, Yuriko Iwakura, Jun Utsumi, Hidenao Sasaki

    NEUROSCIENCE LETTERS   587 ( 587 )   17 - 21   2015年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER IRELAND LTD  

    Parkinson's disease (PD) is characterised by the progressive loss of dopaminergic neurons, neurons that are regulated by the development, protection and function of neuregulin-1 (NRG1)-ErbB4 signals, in the substantia nigra (SN). NRG1 is a neurotrophic differentiation factor and one of its isoforms is a sensory and motor neuron-derived factor (SMDF), mostly expressed in neurons. To examine the relationship between NRG1 SMDF and PD, we tested whether NRG1 SMDF can be detected and measured in plasma and whether their level in plasma correlates with the clinical severity of PD. We detected NRG1 SMDF to be immunoreactive in plasma. Using an ELISA method specific for NRG1 SMDF, we found that NRG1 SMDF levels were significantly reduced in sporadic PD as compared to controls. However, levels of plasma NRG1 SMDF showed no correlation with the clinical severity of PD. Additionally, we found that there was a correlation of NRG1 SMDF levels in CSF with that in plasma where levels in plasma were significantly higher, at approximately ten times that in CSF. Finally, we also examined the expression of NRG1 SMDF in the post-mortem brain using immunohistochemistry and showed that Lewy bodies in the SN of patients with PD were immunoreactive for NRG1 SMDF. In summary, we found that the reduction of plasma NRG1 SMDF is specifically associated with PD, but has no correlation with the clinical severity of PD. These findings of NRG1 SMDF may provide important complementary information for diagnosing the onset of PD. (C) 2014 Elsevier Ireland Ltd. All rights reserved.

    DOI: 10.1016/j.neulet.2014.12.024

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  • Neurobehavioral Differences Between Mice Receiving Distinct Neuregulin Variants as Neonates; Impact on Sensitivity to MK-801 査読

    T. Kato, Y. Abe, S. Hirokawa, Y. Iwakura, M. Mizuno, H. Namba, H. Nawa

    CURRENT MOLECULAR MEDICINE   15 ( 3 )   222 - 236   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:BENTHAM SCIENCE PUBL LTD  

    Neuregulin-1 (NRG1) is a well-recognized risk gene for schizophrenia and is often implicated in the neurodevelopmental hypothesis of this illness. Alternative splicing and proteolytic processing of the NRG1 gene produce more than 30 structural variants; however, the neuropathological roles of individual variants remain to be characterized. On the basis of the neurodevelopmental hypothesis of schizophrenia, we administered eNRG1 (0.1 similar to 1.0 mu g/g), a core epidermal growth factor-like (EGF) domain common for all splicing NRG1 variants, to neonatal mice and compared their behavioral performance with mice challenged with a full mature form of type 1 NRG1 variant. During the neonatal stage, recombinant eNRG1 protein administrated from the periphery passed the blood-brain barrier and activated its receptor (ErbB4) in the brain. In adults, the mice receiving the highest dose exhibited lower locomotor activity and deficits in prepulse inhibition and tone-dependent fear learning, although the hearing reduction of the eNRG1-treated mice may explain these behavioral deficits. Neonatal eNRG1 treatment also significantly potentiated MK-801-driven locomotor activity in an eNRG1 dose-dependent manner. In parallel eNRG1 treatment enhanced MK-801-driven c-Fos induction and decreased immunoreactivity for NMDA receptor subunits in adult brain. In contrast, mice that had been treated with the same molar dose of a full mature form of type 1 NRG1 as neonates did not exhibit hypersensitivity to MK-801. However, both animal models exhibited similar hypersensitivity to methamphetamine. Collectively, our findings suggest that aberrant peripheral NRG1 signals during neurodevelopment alter later behavioral traits and auditory functions in the NRG1 subtype-dependent manner.

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  • Neuropathologic implication of peripheral neuregulin-1 and EGF signals in dopaminergic dysfunction and behavioral deficits relevant to schizophrenia: Their target cells and time window 査読

    Hiroyuki Nawa, Hidekazu Sotoyama, Yuriko Iwakura, Nobuyuki Takei, Hisaaki Namba

    BioMed Research International   2014 ( 2014 )   697935   2014年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Hindawi Publishing Corporation  

    Neuregulin-1 and epidermal growth factor (EGF) are implicated in the pathogenesis of schizophrenia. To test the developmental hypothesis for schizophrenia, we administered these factors to rodent pups, juveniles, and adults and characterized neurobiological and behavioral consequences. These factors were also provided from their transgenes or infused into the adult brain. Here we summarize previous results from these experiments and discuss those from neuropathological aspects. In the neonatal stage but not the juvenile and adult stages, subcutaneously injected factors penetrated the blood-brain barrier and acted on brain neurons, which later resulted in persistent behavioral and dopaminergic impairments associated with schizophrenia. Neonatally EGF-treated animals exhibited persistent hyperdopaminergic abnormalities in the nigro-pallido-striatal system while neuregulin-1 treatment resulted in dopaminergic deficits in the corticolimbic dopamine system. Effects on GABAergic and glutamatergic systems were transient or limited. Even in the adult stage, intracerebral administration and transgenic expression of these factors produced similar but not identical behavioral impairments, although the effects of intracerebral administration were reversible. These findings suggest that dopaminergic development is highly vulnerable to circulating ErbB ligands in the pre- and perinatal stages. Once maldevelopment of the dopaminergic system is established during early development, dopamine-associating behavioral deficits become irreversible and manifest at postpubertal stages. © 2014 Hiroyuki Nawa et al.

    DOI: 10.1155/2014/697935

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  • Neurobehavioral deficits of epidermal growth factor-overexpressing transgenic mice: impact on dopamine metabolism. 査読

    Eda Takeyoshi, Mizuno Makoto, Araki Kazuaki, Iwakura Yuriko, Namba Hisaaki, Sotoyama Hidekazu, Kakita Akiyoshi, Takahashi Hitoshi, Satoh Hiroshi, Chan Siu-Yuen, Nawa Hiroyuki

    Neurosci Lett   547   21 - 25   2013年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Epidermal growth factor (EGF) and its family member neuregulin-1 are implicated in the etiology of schizophrenia. Our recent pharmacological studies indicate that EGF injections to neonatal and adult rats both induce neurobehavioral deficits relevant to schizophrenia. We, however, did not evaluate the genetic impact of EGF transgene on neurobehavioral traits. Here we analyzed transgenic mice carrying the transgene of mouse EGF cDNA. As compared to control littermates, heterozygous EGF transgenic mice had an increase in EGF mRNA levels and showed significant decreases in prepulse inhibition and context-dependent fear learning, but there were no changes in locomotor behaviors and sound startle responses. In addition, these transgenic mice exhibited higher behavioral sensitivity to the repeated cocaine injections. There were neurochemical alterations in metabolic enzymes of dopamine (i.e., tyrosine hydroxylase, dopa decarboxylase, catechol-O-methyl transferase) and monoamine contents in various brain regions of the EGF transgenic mice, but there were no apparent neuropathological signs in the brain. The present findings rule out the indirect influence of anti-EGF antibody production

    DOI: 10.1016/j.neulet.2013.04.055

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  • Neurobehavioral deficits of epidermal growth factor-overexpressing transgenic mice: Impact on dopamine metabolism 査読

    Takeyoshi Eda, Makoto Mizuno, Kazuaki Araki, Yuriko Iwakura, Hisaaki Namba, Hidekazu Sotoyama, Akiyoshi Kakita, Hitoshi Takahashi, Hiroshi Satoh, Siu-Yuen Chan, Hiroyuki Nawa

    NEUROSCIENCE LETTERS   547 ( 547 )   21 - 25   2013年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER IRELAND LTD  

    Epidermal growth factor (EGF) and its family member neuregulin-1 are implicated in the etiology of schizophrenia. Our recent pharmacological studies indicate that EGF injections to neonatal and adult rats both induce neurobehavioral deficits relevant to schizophrenia. We, however, did not evaluate the genetic impact of EGF transgene on neurobehavioral traits. Here we analyzed transgenic mice carrying the transgene of mouse EGF cDNA. As compared to control littermates, heterozygous EGF transgenic mice had an increase in EGF mRNA levels and showed significant decreases in prepulse inhibition and context-dependent fear learning, but there were no changes in locomotor behaviors and sound startle responses. In addition, these transgenic mice exhibited higher behavioral sensitivity to the repeated cocaine injections. There were neurochemical alterations in metabolic enzymes of dopamine (i.e., tyrosine hydroxylase, dopa decarboxylase, catechol-O-methyl transferase) and monoamine contents in various brain regions of the EGF transgenic mice, but there were no apparent neuropathological signs in the brain. The present findings rule out the indirect influence of anti-EGF antibody production on the reported behavioral deficits of EGF-injected mice. These results support the argument that aberrant hyper-signals of EGF have significant impact on mouse behavioral traits and dopamine metabolism. (c) 2013 Elsevier Ireland Ltd. All rights reserved.

    DOI: 10.1016/j.neulet.2013.04.055

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  • ErbB inhibitors ameliorate behavioral impairments of an animal model for schizophrenia: implication of their dopamine-modulatory actions 査読

    M. Mizuno, H. Sotoyama, H. Namba, M. Shibuya, T. Eda, R. Wang, T. Okubo, K. Nagata, Y. Iwakura, H. Nawa

    TRANSLATIONAL PSYCHIATRY   3 ( 3 )   e252   2013年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:NATURE PUBLISHING GROUP  

    Ligands for ErbB receptors, including epidermal growth factor (EGF) and neuregulin-1, have a neurotrophic activity on midbrain dopaminergic neurons and are implicated in the pathophysiology of schizophrenia. Although ErbB kinase inhibitors ameliorate behavioral deficits of the schizophrenia model that was established by hippocampal lesioning of rat pups, the antipsychotic action of ErbB kinase inhibitors and its general applicability to other models are not fully characterized. Using a different animal model, here, we examined whether and how ErbB kinase inhibitors ameliorate the behavioral endophenotypes relevant to schizophrenia. The animal model for schizophrenia was prepared by exposing neonatal rats to the cytokine EGF. Intraventricular infusion of the ErbB1 inhibitors ZD1839 and PD153035 in these animals ameliorated the deficits in startle response and prepulse inhibition in a dose-dependent manner. The deficits of latent inhibition of fear learning were also alleviated by ZD1839 with its limited effects on body weight gain or locomotor activity. ZD1839 infusion also decreased the busting activity of nigral dopamine (DA) neurons and reduced pallidal DA metabolism, a result that mimics the anti-dopaminergic profile of risperidone and haloperidol in this brain region. ErbB inhibitors appear to have anti-dopaminergic actions to alleviate some of the behavioral deficits common to animal models for schizophrenia.

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  • ErbB2 dephosphorylation and anti-proliferative effects of neuregulin-1 in ErbB2-overexpressing cells; re-evaluation of their low-affinity interaction. 査読

    Wang Ran, Iwakura Yuriko, Araki Kazuaki, Keino-Masu Kazuko, Masu Masayuki, Wang Xue-yi, Takei Nobuyuki, Higashiyama Shigeki, Nawa Hiroyuki

    Sci Rep   3   1402 - 1402   2013年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Neuregulin-1 binds to ErbB3 and ErbB4 and regulates cancer proliferation and differentiation. Neuregulin-1 had been suggested to also react with ErbB2, but this argument becomes controversial. Here, we re-evaluated the cellular responses and ErbB2 interaction of neuregulin-1 in ErbB2 overexpressing cell lines. In a competitive ligand-binding assay, we detected significant replacement of [(35)S]-labeled neuregulin-1 with nano molar ranges of cold neuregulin-1 in L929 cells expressing ErbB2 alone and SKOV3 cells carrying sulf-1 cDNA but not in these parental cells. The concentration of neuregulin-1 significantly decreased thymidine incorporation and phosphorylation of ErbB2 (Tyr877, Tyr1396, and Tyr1121) in ErbB2-overexpressing cancer cells as well as in L929 cells expressing ErbB2. A crosslinking assay ascertained the presence of neuregulin-1 immunoreactivity in the ErbB2 immune complexes of L929 expressing ErbB2 alone. These results suggest that the higher concentrations of neuregulin-1 exert an anti-oncogenic activity to attenuate ErbB2 auto-phosphorylation potentially through its low-affinity interaction with ErbB2.

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  • ErbB2 dephosphorylation and anti-proliferative effects of neuregulin-1 in erbb2-overexpressing cells; Re-evaluation of their low-affinity interaction 査読

    Ran Wang, Yuriko Iwakura, Kazuaki Araki, Kazuko Keino-Masu, Masayuki Masu, Xue-Yi Wang, Nobuyuki Takei, Shigeki Higashiyama, Hiroyuki Nawa

    Scientific Reports   3 ( 3 )   1402   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Neuregulin-1 binds to ErbB3 and ErbB4 and regulates cancer proliferation and differentiation. Neuregulin-1 had been suggested to also react with ErbB2, but this argument becomes controversial. Here, we re-evaluated the cellular responses and ErbB2 interaction of neuregulin-1 in ErbB2 overexpressing cell lines. In a competitive ligand-binding assay, we detected significant replacement of [ 35 S]-labeled neuregulin-1 with nano molar ranges of cold neuregulin-1 in L929 cells expressing ErbB2 alone and SKOV3 cells carrying sulf-1 cDNA but not in these parental cells. The concentration of neuregulin-1 significantly decreased thymidine incorporation and phosphorylation of ErbB2 (Tyr877, Tyr1396, and Tyr1121) in ErbB2-overexpressing cancer cells as well as in L929 cells expressing ErbB2. A crosslinking assay ascertained the presence of neuregulin-1 immunoreactivity in the ErbB2 immune complexes of L929 expressing ErbB2 alone. These results suggest that the higher concentrations of neuregulin-1 exert an anti-oncogenic activity to attenuate ErbB2 auto-phosphorylation potentially through its low-affinity interaction with ErbB2.

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  • ErbB1-4-dependent EGF/neuregulin signals and their cross talk in the central nervous system: pathological implications in schizophrenia and Parkinson’s disease 査読

    Iwakura Y, Nawa H

    Frontiers in Cellular Neuroscience.   13 ( 2013 )   1 - 35   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.3389/fncel.2013.00004

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  • Pallidalhyperdopaminergic innervation induced by neonatal exposure to epidermal growth factor; implication in schizophrenia 査読

    Nawa H, Namba H, Iwakura Y, Takei N, Sotoyama H

    JOURNAL OF NEUROCHEMISTRY   123   20   2012年10月

  • Pallidal Hyperdopaminergic Innervation Underlying D2 Receptor-Dependent Behavioral Deficits in the Schizophrenia Animal Model Established by EGF 査読

    Hidekazu Sotoyama, Yingjun Zheng, Yuriko Iwakura, Makoto Mizuno, Miho Aizawa, Ksenia Shcherbakova, Ran Wang, Hisaaki Namba, Hiroyuki Nawa

    PLOS ONE   6 ( 10 )   2011年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:PUBLIC LIBRARY SCIENCE  

    Epidermal growth factor (EGF) is one of the ErbB receptor ligands implicated in schizophrenia neuropathology as well as in dopaminergic development. Based on the immune inflammatory hypothesis for schizophrenia, neonatal rats are exposed to this cytokine and later develop neurobehavioral abnormality such as prepulse inhibition (PPI) deficit. Here we found that the EGF-treated rats exhibited persistent increases in tyrosine hydroxylase levels and dopamine content in the globus pallidus. Furthermore, pallidal dopamine release was elevated in EGF-treated rats, but normalized by subchronic treatment with risperidone concomitant with amelioration of their PPI deficits. To evaluate pathophysiologic roles of the dopamine abnormality, we administered reserpine bilaterally to the globus pallidus to reduce the local dopamine pool. Reserpine infusion ameliorated PPI deficits of EGF-treated rats without apparent aversive effects on locomotor activity in these rats. We also administered dopamine D1-like and D2-like receptor antagonists (SCH23390 and raclopride) and a D2-like receptor agonist (quinpirole) to the globus pallidus and measured PPI and bar-hang latencies. Raclopride (0.5 and 2.0 mu g/site) significantly elevated PPI levels of EGF-treated rats, but SCH23390 (0.5 and 2.0 mu g/site) had no effect. The higher dose of raclopride induced catalepsy-like changes in control animals but not in EGF-treated rats. Conversely, local quinpirole administration to EGF-untreated control rats induced PPI deficits and anti-cataleptic behaviors, confirming the pathophysiologic role of the pallidal hyperdopaminergic state. These findings suggest that the pallidal dopaminergic innervation is vulnerable to circulating EGF at perinatal and/or neonatal stages and has strong impact on the D2-like receptor-dependent behavioral deficits relevant to schizophrenia.

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  • Dopamine-dependent ectodomain shedding and release of epidermal growth factor in developing striatum: target-derived neurotrophic signaling (Part 2) 査読

    Yuriko Iwakura, Ran Wang, Yuichi Abe, Ying-shan Piao, Yuji Shishido, Shigeki Higashiyama, Nobuyuki Takei, Hiroyuki Nawa

    JOURNAL OF NEUROCHEMISTRY   118 ( 1 )   57 - 68   2011年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL  

    Epidermal growth factor (EGF) and structurally related peptides promote neuronal survival and the development of midbrain dopaminergic neurons; however, the regulation of their production has not been fully elucidated. In this study, we found that the treatment of striatal cells with dopamine agonists enhances EGF release both in vivo and in vitro. We prepared neuron-enriched and non-neuronal cell-enriched cultures from the striatum of rat embryos and challenged those with various neurotransmitters or dopamine receptor agonists. Dopamine and a dopamine D(1)-like receptor agonist (SKF38393) triggered EGF release from neuron-enriched cultures in a dose-dependent manner. A D(2)-like agonist (quinpirole) increased EGF release only from non-neuronal cell-enriched cultures. The EGF release from striatal neurons and non-neuronal cells was concomitant with ErbB1 phosphorylation and/or with the activation of a disintegrin and metalloproteinase and matrix metalloproteinase. The EGF release from neurons was attenuated by an a disintegrin and metalloproteinase/matrix metalloproteinase inhibitor, GM6001, and a calcium ion chelator, BAPTA/AM. Transfection of cultured striatal neurons with alkaline phosphatase-tagged EGF precursor cDNA confirmed that dopamine D(1)-like receptor stimulation promoted both ectodomain shedding of the precursor and EGF release. Therefore, the activation of striatal dopamine receptors induces shedding and release of EGF to provide a retrograde neurotrophic signal to midbrain dopaminergic neurons.

    DOI: 10.1111/j.1471-4159.2011.07295.x

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  • Qualitative and quantitative re-evaluation of epidermal growth factor-ErbB1 action on developing midbrain dopaminergic neurons in vivo and in vitro: target-derived neurotrophic signaling (Part 1) 査読

    Yuriko Iwakura, Yingjun Zheng, Maria Sibilia, Yuichi Abe, Ying-shan Piao, Daisaku Yokomaku, Ran Wang, Yuta Ishizuka, Nobuyuki Takei, Hiroyuki Nawa

    JOURNAL OF NEUROCHEMISTRY   118 ( 1 )   45 - 56   2011年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-BLACKWELL  

    Although epidermal growth factor (EGF) receptor (ErbB1) is implicated in Parkinson&apos;s disease and schizophrenia, the neurotrophic action of ErbB1 ligands on nigral dopaminergic neurons remains controversial. Here, we ascertained colocalization of ErbB1 and tyrosine hydroxylase (TH) immunoreactivity and then characterized the neurotrophic effects of ErbB1 ligands on this cell population. In mesencephalic culture, EGF and glial-derived neurotrophic factor (GDNF) similarly promoted survival and neurite elongation of dopaminergic neurons and dopamine uptake. The EGF-promoted dopamine uptake was not inhibited by GDNF-neutralizing antibody or TrkB-Fc, whereas EGF-neutralizing antibody fully blocked the neurotrophic activity of the conditioned medium that was prepared from EGF-stimulated mesencephalic cultures. The neurotrophic action of EGF was abolished by ErbB1 inhibitors and genetic disruption of erbB1 in culture. In vivo administration of ErbB1 inhibitors to rat neonates diminished TH and dopamine transporter (DAT) levels in the striatum and globus pallidus but not in the frontal cortex. In parallel, there was a reduction in the density of dopaminergic varicosities exhibiting intense TH immunoreactivity. In agreement, postnatal erbB1-deficient mice exhibited similar decreases in TH levels. Although neurotrophic supports to dopaminergic neurons are redundant, these results confirm that ErbB1 ligands contribute to the phenotypic and functional development of nigral dopaminergic neurons.

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  • In vitro production of an active neurotrophic factor, neuregulin-1: Qualitative comparison of different cell-free translation systems 査読

    Ran Wang, Yuriko Iwakura, Kazuaki Araki, Hidekazu Sotoyama, Nobuyuki Takei, Hiroyuki Nawa

    NEUROSCIENCE LETTERS   497 ( 2 )   90 - 93   2011年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER IRELAND LTD  

    The individual biological activities of many neurotrophic factors and their variants, which are produced by alternative splicing and proteolytic processing, often remain to be characterized. Bacterial protein production combined with protein refolding and purification is a conventional procedure to obtain active neurotrophic factors; however, the procedure is time consuming and appropriate protein refolding in vitro is sometimes unpredictable. Here we examined three distinct cell-free translation systems: reticulocyte lysate, Hela cell lysate and wheat germ extract, which may allow us to produce biologically active factors in a single tube. Taking type-I neuregulin-1 beta3 as an example, we produced neuregulin-1 protein from its mRNAs flanked by Cap nucleotide and/or internal ribosome entry site (IRES) and compared the yields and biological activity of translation products from these systems. The protein yield from IRES+ mRNA was highest in the Hela cell-free system, while background translation was lowest in the wheat germ system. The biological activity of both translation products was modest or negligible, however. Neuregulin-1 protein was produced in reticulocyte lysate at yields of 19 pmol/mL (similar to 500 ng/mL); furthermore, it was potent at phosphorylating ErbB4 receptor and able to bind to heparin sulfate. These results demonstrate that the reticulocyte lysate translation system produces active neurotrophic factors in vitro and is useful for radiolabeling or preliminary assessment of novel neurotrophic factors and their variants. (C) 2011 Elsevier Ireland Ltd. All rights reserved.

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  • Neuregulin-1 Signals from the Periphery Regulate AMPA Receptor Sensitivity and Expression in GABAergic Interneurons in Developing Neocortex 査読

    Yuichi Abe, Hisaaki Namba, Taisuke Kato, Yuriko Iwakura, Hiroyuki Nawa

    JOURNAL OF NEUROSCIENCE   31 ( 15 )   5699 - 5709   2011年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SOC NEUROSCIENCE  

    Neuregulin-1 (NRG1) signaling is thought to contribute to both neuronal development and schizophrenia neuropathology. Here, we describe the developmental effects of excessive peripheral NRG1 signals on synaptic activity and AMPA receptor expression of GABAergic interneurons in postnatal rodent neocortex. A core peptide common to all NRG1 variants (eNRG1) was subcutaneously administered to mouse pups. Injected eNRG1 penetrated the blood-brain barrier and activated ErbB4 NRG1 receptors in the neocortex, in which ErbB4 mRNA is predominantly expressed by parvalbumin-positive GABAergic interneurons. We prepared neocortical slices from juvenile mice that were receiving eNRG1 subchronically and recorded inhibitory synaptic activity from layer V pyramidal neurons. Postnatal eNRG1 treatment significantly enhanced polysynaptic IPSCs, although monosynaptic IPSCs were not affected. Examination of excitatory inputs to parvalbumin-containing GABAergic interneurons revealed that eNRG1 treatment significantly increased AMPA-triggered inward currents and the amplitudes and frequencies of miniature EPSCs (mEPSCs). Similar effects on mEPSCs were observed in mice treated with a soluble, full-length form of NRG1 type I. Consistent with the electrophysiologic data, expression of the AMPA receptor GluA1 (i.e., GluR1, GluRA) was upregulated in the postsynaptic density/cytoskeletal fraction prepared from eNRG1-treated mouse neocortices. Cortical GABAergic neurons cultured with eNRG1 exhibited a significant increase in surface GluA1 immunoreactivity at putative synaptic sites on their dendrites. These results indicate that NRG1 circulating in the periphery influences postnatal development of synaptic AMPA receptor expression in cortical GABAergic interneurons and may play a role in conditions characterized by GABA-associated neuropathologic processes.

    DOI: 10.1523/JNEUROSCI.3477-10.2011

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  • Regulated processing/release of neuregulin-1 precursors in rat cortical neurons 査読

    Iwakura Yuriko, Wang Ran, Araki Kazuaki, Nawa Hiroyuki

    NEUROSCIENCE RESEARCH   71   E138   2011年

  • Antipsychotic Potential of Quinazoline ErbB1 Inhibitors in a Schizophrenia Model Established With Neonatal Hippocampal Lesioning 査読

    Makoto Mizuno, Yuriko Iwakura, Masako Shibuya, Yingjun Zheng, Takeyoshi Eda, Taisuke Kato, Yohei Takasu, Hiroyuki Nawa

    JOURNAL OF PHARMACOLOGICAL SCIENCES   114 ( 3 )   320 - 331   2010年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:JAPANESE PHARMACOLOGICAL SOC  

    Hyper-signaling of the epidermal growth factor receptor family (ErbB) is implicated in the pathophysiology of schizophrenia. Various quinazoline inhibitors targeting ErbB1 or ErbB2 - 4 have been developed as anti-cancer agents and might be useful for antipsychotic treatment. In the present study, we used an animal model of schizophrenia established by neonatal hippocampal lesioning and evaluated the neurobehavioral consequences of ErbB1-inhibitor treatment. Subchronic administration of the ErbB1 inhibitor ZD1839 to the cerebroventricle of rats receiving neonatal hippocampal lesioning ameliorated deficits in prepulse inhibition as well as those in the latent inhibition of tone-dependent fear learning. There were no apparent adverse effects on basal learning scores or locomotor activity, however. The administration of other ErbB1 inhibitors, PD153035 and OSI-774, similarly attenuated the prepulse inhibition impairment of this animal model. In parallel, there were decreases in ErbB1 phosphorylation in animals treated with ErbB1 inhibitors. These results indicate an antipsychotic potential of quinazoline ErbB1 inhibitors. ErbB receptor tyrosine kinases may be novel therapeutic targets for schizophrenia or its related psychotic symptoms.

    DOI: 10.1254/jphs.10099FP

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  • Distinct ErbB receptor binding and signaling of neuregulin-1 splicing isoforms 査読

    Wang Ran, Iwakura Yuriko, Takei Nobuyuki, Ishizuka Yuta, Zheng Yingjun, Kato Taisuke, Higashiyama Shigeki, Nawa Hiroyuki

    NEUROSCIENCE RESEARCH   68   E142   2010年

  • Molecular pathology of ErbB signaling in schizophrenia and its models 査読

    Nawa Hiroyuki, Mizuno Makoto, Sotoyama Hidekazu, Zheng Yingjun, Kato Taisuke, Abe Yuichi, Sakai Miwako, Shibuya Masako, Eda Takeyoshi, Wang Ran, Araki Kazuaki, Ishizuka Yuta, Takei Nobuyuki, Iwakura Yuriko, Namba Hisaaki

    NEUROSCIENCE RESEARCH   65   S31   2009年

  • Dopamine D1 receptor-induced signaling through TrkB receptors in striatal neurons 査読

    Yuriko Iwakura, Hiroyuki Nawa, Ichiro Sora, Moses V. Chao

    JOURNAL OF BIOLOGICAL CHEMISTRY   283 ( 23 )   15799 - 15806   2008年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC  

    In addition to its role as a neurotransmitter, dopamine can stimulate neurite outgrowth and morphological effects upon primary neurons. To investigate the signal transduction mechanisms used by dopamine in developing striatal neurons, we focused upon the effects of activating the dopamine D1 receptor. Using the D1 receptor agonist SKF38393, we found that Trk neurotrophin receptors were activated in embryonic day 18 striatal neurons. K-252a, a Trk tyrosine kinase inhibitor, and a dopamine D1 receptor antagonist could block the effects of SKF38393. The increase in TrkB phosphorylation was not the result of increased neurotrophin production. Induction of TrkB activity by SKF38393 was accompanied by the phosphorylation of several Trk signaling proteins, including phospholipase C gamma, Akt, and MAPK. Biotinylation experiments followed by immunostaining by phospho-TrkB-specific antibodies indicated that the mechanism involved increased TrkB surface expression by dopamine D1 receptor activation. This increase in cell surface TrkB expression was dependent upon an increase in intracellular Ca(2+). These results indicate that stimulation of dopamine D1 receptors can be coupled to the neurotrophin receptor signaling to mediate the effects of dopamine upon striatal neurons.

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  • Neurotrophic effects of EGF/ErbB1 signals on developing midbrain dopaminergic neurons 査読

    Iwakura Yuriko, Zheng Ying, Piao Ying-Shan, Yokomaku Daisaku, Aoki Hiroyuki, Takei Nobuyuki, Nawa Hiroyuki

    NEUROSCIENCE RESEARCH   58   S58   2007年

  • Transforming growth factor alpha attenuates the functional expression of AMPA receptors in cortical GABAergic neurons 査読

    H Namba, T Nagano, Y Iwakura, H Xiong, H Jourdi, N Takei, H Nawa

    MOLECULAR AND CELLULAR NEUROSCIENCE   31 ( 4 )   628 - 641   2006年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ACADEMIC PRESS INC ELSEVIER SCIENCE  

    In the developing neocortex, brain-derived neurotrophic factor (BDNF) exerts a trophic activity to increase the expression and channel activity of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-type glutamate receptor subunits. Here, we demonstrate that the epidermal growth factor (EGF) receptor (ErbB1) ligands exert the opposite biological activity in cultured neocortical neurons. Subchronic stimulation of ErbB1 with transforming growth factor alpha (TGF alpha) EGF, or heparin-binding EGF (HB-EGF) down-regulated protein expression of the GluR1 AMPA receptor subunit in cultured neocortical neurons. In agreement, TGF alpha treatment decreased the B-max of [H-3] AMPA binding and GluR1 mRNA levels. Immunocytochemistry revealed that the decrease in GluR1 was most pronounced in multipolar GABAergic neurons. To examine the physiological consequences, we recorded AMPA-evoked currents as well as miniature excitatory postsynaptic currents in morphologically identified putative GABAergic neurons in culture. Suhchronic TGF alpha treatment decreased AMPA-triggered currents as well as the amplitude and frequency of miniature excitatory postsynaptic currents. An ErbB1 tyrosine kinase inhibitor, PD153035, inhibited the TGF alpha effect. Moreover, TGF alpha counteracted the neurotrophic activity of BDNF on AMPA receptor expression. Co-application of TGF alpha with BDNF blocked the BDNF-triggered up-regulation of AMPA receptor expression and currents. These observations reveal a negative regulatory activity of the ErbB1 ligand, TGF alpha, which reduces the input sensitivity of cortical GABAergic neurons to attenuate their inhibitory function. (c) 2005 Elsevier Inc. All rights reserved.

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  • Intereukin-1 receptor antagonist effects on neural and behavioral development in mice 査読

    Tsuda N, Iwakura Y, Nawa H

    JOURNAL OF PHARMACOLOGICAL SCIENCES   100   144P   2006年

  • Differential distributions of peptides in the epidermal growth factor family and phosphorylation of ErbB1 receptor in adult rat brain 査読

    YS Piao, Y Iwakura, N Takei, H Nawa

    NEUROSCIENCE LETTERS   390 ( 1 )   21 - 24   2005年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER IRELAND LTD  

    Using two-site enzyme immunoassays, we measured protein levels of epidermal growth factor (EGF), transforming growth factor alpha (TGF alpha), and heparin-binding epidermal growth factor (HB-EGF) in adult rat brain, and compared them with the phosphorylation levels of their receptor (ErbB 1). There were significant variations in the brain distributions of each ErbB I ligand. Among these ErbB1 ligands, HB-EGF protein levels were higher than those of TGF alpha and those of EGF were the lowest. TGF alpha protein was relatively enriched in the midbrain regions, while HB-EGF levels were most abundant in the cerebellum. Protein distributions of the EGF family members were discordant with previously reported mRNA distributions. In addition, there was significant basal ErbB I phosphorylation detected with the largest amount of activation in the midbrain. These observations suggest that the activation of brain ErbB1 involves post-translational regulation of multiple EGF family members in a region-specific manner. (C) 2005 Elsevier Ireland Ltd. All rights reserved.

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  • 上皮成長因子ファミリーによるドパミン神経発達調節活性と認知機能障害の関連解析

    岩倉百合子, 朴英善, 外山英和, 渡部雄一郎, 金善和, 水野誠, 那波宏之

    精神薬療研究年報   37   138 - 143   2005年12月

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    記述言語:日本語   掲載種別:研究論文(国際会議プロシーディングス)  

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  • Influences of Dopaminergic Lesion on Epidermal Growth Factor-ErbB Signals in Parkinson’s Disease and Its Model; Neurotrophic Implication in Nigrostriatal Neurons. 査読

    Iwakura Yuriko, Piao Ying-shan, Mizuno Makoto, Takei Nobuyuki, Kakita Akiyoshi, Takahashi Hitoshi, Nawa Hiroyuki

    Jounal of Neurochemistry   93 ( 4 )   974 - 983   2005年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Regulated release of EGF-like molecules from rat striatal culture: Their trophic activity on midbrain dopaminergic neurons. 査読

    Iwakura Y, Piao YS, Takei N, Nawa H

    FASEB JOURNAL   18 ( 8 )   C255   2004年5月

  • Brain-derived neurotrophic factor signal enhances and maintains the expression of AMPA receptor-associated PDZ proteins in developing cortical neurons 査読

    H Jourdi, Y Iwakura, M Narisawa-Saito, K Ibaraki, HB Xiong, M Watanabe, Y Hayashi, N Takei, H Nawa

    DEVELOPMENTAL BIOLOGY   263 ( 2 )   216 - 230   2003年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ACADEMIC PRESS INC ELSEVIER SCIENCE  

    Postsynaptic molecules with PDZ domains (PDZ proteins) interact with various glutamate receptors and regulate their subcellular trafficking and stability. In rat neocortical development, the protein expression of AMPA-type glutamate receptor GluR1 lagged behind its mRNA expression and rather paralleled an increase in PDZ protein levels. One of the neurotrophins, brain-derived neurotrophic factor (BDNF), appeared to contribute to this process, regulating the PDZ protein expression. In neocortical cultures, BDNF treatment upregulated SAP97, GRIP1, and Pick1 PDZ proteins. Conversely, BDNF gene targeting downregulated these same PDZ molecules. The BDNF-triggered increases in PDZ proteins resulted in the elevation of their total association with the AMPA receptors GluR1 and GluR2/3, which led to the increase in AMPA receptor proteins. When Sindbis viruses carrying GluR1 or GluR2 C-terminal decoys disrupted their interactions, GluR2 C-terminal decoys inhibited both BDNF-triggered GluR1 and GluR2/3 increases, whereas GluR1 C-terminal decoys blocked only the BDNF-triggered GluR1 increase. In agreement, coexpression of SAP97 and GluR1 in nonneuronal HEK293 cells increased both proteins compared with their single transfection, implying mutual stabilization. This work reveals a novel function of BDNF in postsynaptic development by regulating the PDZ protein expression. (C) 2003 Elsevier Inc. All rights reserved.

    DOI: 10.1016/j.ydbio.2003.07.008

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  • Brain-derived neurotrophic factor regulates surface expression of alpha-amino-3-hydroxy-5-methyl-4-isoxazoleproprionic acid receptors by enhancing the N-ethylmaleimide-sensitive factor/GluR2 interaction in developing neocortical neurons 査読

    M Narisawa-Saito, Y Iwakura, M Kawamura, K Araki, S Kozaki, N Takei, H Nawa

    JOURNAL OF BIOLOGICAL CHEMISTRY   277 ( 43 )   40901 - 40910   2002年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC  

    In hippocampal neurons, the exocytotic process of alpha-amino-3-hydroxy-5-methyl-4-isoxazoleproprionic acid (AMPA)-type glutamate receptors is known to depend on activation of N-methyl-D-aspartate channels and its resultant Ca2+ influx from extracellular spaces. Here we found that brain-derived neurotrophic factor (BDNF) induced a rapid surface translocation of AMPA receptors in an activity-independent manner in developing neocortical neurons. The receptor translocation became evident within hours as monitored by [H-3]AMPA binding and was resistant against ionotropic glutamate receptor antagonists as evidenced with surface biotinylation assay. This process required intracellular Ca2+ and was inhibited by the blockers of conventional exocytosis, brefeldin A, botulinuin toxin B, and N-ethylmaleimide. To explore the translocation mechanism of individual AMPA receptor subunits, we utilized the human embryonic kidney (HEK) 293 cells carrying the BDNF receptor TrkB. After the single transfection of GluR2 cDNA or GluR1 cDNA into HEK/TrkB cells, BDNF triggered the translocation of GluR2 but not that of GluR1. Subsequent mutation analysis of GluR2 carboxyl-terminal region indicated that the translocation of GluR2 subunit in HEK293 cells involved its N-ethylmaleimide-sensitive factor-binding domain but not its PDZ-interacting site. Following co-transfection of GluR1 and GluR2 cDNAs, solid phase cell sorting revealed that GluR1 subunits were also able to translocate to the cell surface in response to BDNF. An immunoprecipitation assay confirmed that BDNF stimulation can enhance the interaction of GluR2 with N-ethylmaleimide-sensitive factor. These results reveal a novel role of BDNF in regulating the surface expression of AMPA receptors through a GluR2-NSF interaction.

    DOI: 10.1074/jbc.M202158200

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  • N-methyl-D-aspartate-induced α -amino-3-hydroxy-5-methyl-4-isoxazoleproprionic acid (AMPA) receptor down-regulation involves interaction of the carboxyl terminus of GluR2/3 with Pick1: Ligand-binding studies using Sindbis vectors carrying AMPA receptor decoys 査読

    Yuriko Iwakura, Tadasato Nagano, Meiko Kawamura, Hiroshi Horikawa, Kyoko Ibaraki, Nobuyuki Takei, Hiroyuki Nawa

    Journal of Biological Chemistry   276 ( 43 )   40025 - 40032   2001年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    The dynamics of α-amino-3-hydroxy-5-methyl-4-isoxazoleproprionic acid (AMPA)-type glutamate receptors, as represented by their exocytosis, endocytosis and cytoskeletal linkage, has often been implicated in N-methyl-D-aspartate (NMDA)-dependent synaptic plasticity. To explore the molecular mechanisms underlying the AMPA receptor dynamics, cultured hippocampal neurons were stimulated with 100 μM NMDA, and the biochemical and pharmacological changes in the ligand binding activity of AMPA receptor complexes and its subunits, GluR1 and GluR2/3, were investigated. The NMDA treatment reduced the total amount of bound [3H]AMPA on the surface of the neurons but not in their total membrane fraction. This process was mimicked by a protein kinase C activator, phorbol ester, but blocked by an inhibitor of the same kinase, calphostin C. The NMDA-induced down-regulation of the ligand binding activity was also reflected by the decreased AMPA-triggered channel activity as well as by the cells' reduced immunoreactivity for GluR1. In parallel, the NMDA treatment markedly altered the interaction between the AMPA receptor subunits and their associating molecule(s)
    the association of PDZ molecules, including Pick1, with GluR2/3 was enhanced in a protein-kinase-C-dependent manner. Viral expression vectors carrying GluR1 and GluR2 C-terminal decoys, both fused to enhanced green fluorescent protein, were transfected into hippocampal neurons to disrupt their interactions. The overexpression of the C-terminal decoy for GluR2 specifically and significantly blocked the NMDA-triggered reduction in [3H]AMPA binding, whereas that for GluR1 had no effects. Co-immunoprecipitation using anti-Pick1 antibodies revealed that the overexpressed GluR2 C-terminal decoy indeed prevented Pick1 from interacting with the endogenous GluR2/3. Therefore, these observations suggest that the NMDA-induced down-regulation of the functional AMPA receptors involves the interaction between GluR2/3 subunits and Pick1.

    DOI: 10.1074/jbc.M103125200

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  • N-methyl-D-aspartate-induced alpha-amino-3-hydroxy-5-methyl-4-isoxazoleproprionic acid (AMPA) receptor down-regulation involves interaction of the carboxyl terminus of GluR2/3 with Pick1. Ligand-binding studies using Sindbis vectors carrying AMPA receptor

    Iwakura Y, Nagano T, Kawamura M, Horikawa H, Ibaraki K, Takei N, Nawa H

    J Biol Chem   276 ( 43 )   40025 - 40032   2001年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    The dynamics of alpha-amino-3-hydroxy-5-methyl-4-isoxazoleproprionic acid (AMPA)-type glutamate receptors, as represented by their exocytosis, endocytosis and cytoskeletal linkage, has often been implicated in N-methyl-d-aspartate (NMDA)-dependent synaptic plasticity. To explore the molecular mechanisms underlying the AMPA receptor dynamics, cultured hippocampal neurons were stimulated with 100 microm NMDA, and the biochemical and pharmacological changes in the ligand binding activity of AMPA receptor complexes and its subunits, GluR1 and GluR2/3, were investigated. The NMDA treatment reduced the total amount of bound [(3)H]AMPA on the surface of the neurons but not in their total membrane fraction. This process was mimicked by a protein kinase C activator, phorbol ester, but blocked by an inhibitor of the same kinase, calphostin C. The NMDA-induced down-regulation of the ligand binding activity was also reflected by the decreased AMPA-triggered channel activity as well as by the cells&#039; reduced immunoreactivity for GluR1. In parallel, the NMDA treatment markedly altered the interaction between the AMPA receptor subunits and their associating molecule(s); the association of PDZ m

    DOI: 10.1074/jbc.M103125200,

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  • NMDA-induced AMPA receptor Down-regulation Requires Interaction of Carboxyl Terminus of GluR2/3 With Pick1

    Iwakura Y, Nagano T, Kawakura M, Horikawa H, Ibaraki K, Takei N, Nawa H

    Jounal of biological chemistry   2001年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Phenotypic down-regulation of glutamate receptor subunit GluR1 in Alzheimer's diseases 査読

    K Wakabayashi, M Narisawa-Saito, Y Iwakura, T Arai, K Ikeda, H Takahashi, H Nawa

    NEUROBIOLOGY OF AGING   20 ( 3 )   287 - 295   1999年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE INC  

    Glutamate receptors play crucial roles in cognition and memory. We have quantitated the protein levels of alpha-amino-isoxazolepropionic acid (AMPA)-type (GluR1) and N-methyl-D-aspartate-type (NMDAR1) glutamate receptors in postmortem brain tissues of patients with Alzheimer's disease and age-matched controls using western blotting. The bolts carrying fully denatured proteins were probed with antibodies specific to their carboxyl terminus of these receptors. In Alzheimer's disease, GluR1 levels were significantly decreased in the entorhinal cortex and dentate gyrus, but not in the motor cortex. In contrast, Levels of NMDAR1 were not altered in the dentate gyrus, suggesting that GluR1 expression was specifically diminished in this structure that is known to be preserved histologically in patients. However, the results of immunocytochemical examination confirmed a previous controversial report: GluR1-immunoreactive structures were labeled rather intensely in the molecular layer of the dentate gyrus of Alzheimer's patients. Interestingly, levels of a postsynaptic density protein named SAP97, which recognizes and potentially masks the epitope region of GluR1, was positively correlated with those of GluR1 protein in the control group, but not in the patient group. Thus, the enhanced GluR1-like staining in Alzheimer's disease might be ascribed to the hampered interaction between SAP97 and GluR1 leading to epitope unmasking of GluR1 on tissue sections. These findings indicate that abnormal expressions of the AMPA receptor and its interacting PSD molecule are associated with Alzheimer's disease and implicated in pathophysiology of this disease. (C) 1999 Elsevier Science Inc. All rights reserved.

    DOI: 10.1016/S0197-4580(99)00035-4

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MISC

  • 統合失調症患者における脳内コンドロイチン硫酸鎖の変化

    湯川 尊行, 岩倉 百合子, 武井 延之, 斎藤 摩美, 渡部 雄一郎, 豊岡 和彦, 五十嵐 道弘, 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, 入谷 修司, 丹羽 真一, 竹内 亮子, 高橋 均, 柿田 明美, 染矢 俊幸, 那波 宏之

    精神神経学雑誌   ( 2019特別号 )   S410 - S410   2019年6月

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    記述言語:日本語   出版者・発行元:(公社)日本精神神経学会  

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  • 最終糖化産物(AGEs)はヒト血小板において、Srcファミリーキナーゼの活性化を介して脳由来神経栄養因子(BDNF)の放出を促進させる

    古川 和郎, 布施 一郎, 岩倉 百合子, 外山 英和, 羽入 修, 那波 宏之, 曽根 博仁, 武井 延之

    生命科学系学会合同年次大会   2017年度   [2P - 1016]   2017年12月

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    記述言語:日本語   出版者・発行元:生命科学系学会合同年次大会運営事務局  

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  • 最終糖化産物(AGEs)はヒト血小板において、Srcファミリーキナーゼの活性化を介して脳由来神経栄養因子(BDNF)の放出を促進させる

    古川 和郎, 布施 一郎, 岩倉 百合子, 外山 英和, 羽入 修, 那波 宏之, 曽根 博仁, 武井 延之

    生命科学系学会合同年次大会   2017年度   [2P - 1016]   2017年12月

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    記述言語:日本語   出版者・発行元:生命科学系学会合同年次大会運営事務局  

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  • 最終糖化産物(AGE)はヒト血小板からSrc family kinaseの活性を介してBDNFの放出を促進させる

    古川 和郎, 武井 延之, 岩倉 百合子, 外山 英和, 羽入 修, 布施 一郎, 那波 宏之, 曽根 博仁

    糖尿病   59 ( Suppl.1 )   S - 309   2016年4月

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    記述言語:日本語   出版者・発行元:(一社)日本糖尿病学会  

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  • 線条体—黒質経路におけるドパミンと上皮成長因子(EGF)とのクロストーク 招待

    岩倉百合子

    神経化学   51 ( 3 )   2014年12月

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    記述言語:日本語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

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  • ErbB1-4-dependent EGF/neuregulin signals and their cross talk in the central nervous system: pathological implications in schizophrenia and Parkinson's disease 招待 査読

    Yuriko Iwakura, Hiroyuki Nawa

    FRONTIERS IN CELLULAR NEUROSCIENCE   7   2013年2月

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    記述言語:英語   掲載種別:書評論文,書評,文献紹介等   出版者・発行元:FRONTIERS MEDIA SA  

    Ligands for ErbB1-4 receptor tyrosine kinases, such as epidermal growth factor (EGF) and neuregulins, regulate brain development and function. Thus, abnormalities in their signaling are implicated in the etiology or pathology of schizophrenia and Parkinson's disease. Among the ErbB receptors, ErbB1, and ErbB4 are expressed in dopamine and GABA neurons, while ErbB1, 2, and/or 3 are mainly present in oligodendrocytes, astrocytes, and their precursors. Thus, deficits in ErbB signaling might contribute to the neurological and psychiatric diseases stemming from these cell types. By incorporating the latest cancer molecular biology as well as our recent progress, we discuss signal cross talk between the ErbB1-4 subunits and their neurobiological functions in each cell type. The potential contribution of virus-derived cytokines (virokines) that mimic EGF and neuregulin-1 in brain diseases are also discussed.

    DOI: 10.3389/fncel.2013.00004

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  • 統合失調症の分子病態 EGFとIL-1はドーパミン性ニューロンに対し神経栄養活性を示すが後に認識異常を起こす(Neurotrophic activity of EGF and IL-1 on dopaminergic neurons and later cognitive abnormalities)

    那波 宏之, 岩倉 百合子, 水野 誠, 津田 法子, 鄭 英君, 渡部 雄一郎, 染矢 俊幸

    神経化学   44 ( 2-3 )   172 - 172   2005年8月

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    記述言語:英語   出版者・発行元:日本神経化学会  

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  • ErbB1 Ligands stimulate development of midbrain dopamine neurons; implications in schizophrenia 招待

    Iwakura Y, Piao Y, Sotoyama H, Watanabe Y, Kim SH, Mizuno M, Nawa H

    Annual Reports of Mitsubishi Pharma Foundation   ( 37 )   138   2005年

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    記述言語:英語   掲載種別:記事・総説・解説・論説等(その他)  

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  • Development of neurites, dendritic filopodia, and synaptic spines in hippocampal low-density culture

    T Nagano, Y Iwakura, T Ushiki, H Nawa

    NEURAL DEVELOPMENT-BOOK   2 ( 2 )   386 - 393   1999年

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    記述言語:英語   掲載種別:記事・総説・解説・論説等(国際会議プロシーディングズ)   出版者・発行元:SPRINGER-VERLAG TOKYO  

    Low-density cultures of hippocampal neurons are useful for studies of synaptic development. The system of culture with a glial cup we have developed can be maintained for more than a month. Dendritic spine structures were identified after 2 weeks of culture, whereas presynaptic vesicle accumulation was apparent 1 week after plating. The precedence of presynaptic maturation may reflect a process that presynaptic factors induce spine development. However, some neurons began to extend many dendritic filopodia, irrespective of presynaptic contacts, about a week after plating. The filopodial processes that show no presynaptic contacts are suggested to differentiate into spines and therefore are also called free spines. Most of these neurons displayed the dendritic morphology typical of intrinsic GABAergic cells. Previous studies on dendritic spines have shown that morphological spine development in hippocampal pyramidal cells requires presynaptic influences, while that in cerebellar Purkinje cells does not. Taken together, these results suggest that morphological development of dendritic spines in some neuronal types requires presynaptic components and that in the other neuronal types does not.

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講演・口頭発表等

  • Neurotransmitter-dependent shedding of neureguline-1 precursors in rat forebrain neurons 国際会議

    Y. Iwakura, R Wang, N Inamura, K Araki, H. Nawa

    第39回日本神経科学大会  2016年7月  日本神経科学学会

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    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:Pacifico Yokohama  

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  • セロトニン神経細胞の発達・成熟に対する選択的な栄養因子シグナルの作用機序の解明

    岩倉百合子, 小林祐太郎, 斎藤摩美, 那波宏之

    第38回日本分子生物学会年会・第88回日本生化学会大会 合同大会  2015年12月  日本分子生物学会

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    記述言語:英語   会議種別:ポスター発表  

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  • 上皮成長因子(EGF)ファミリーと神経伝達物質のクロストーク 招待

    岩倉百合子

    奈良先端未来開拓コロキウム  2014年12月  奈良先端大

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    記述言語:日本語   会議種別:シンポジウム・ワークショップ パネル(指名)  

    開催地:奈良先端大  

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  • Differential neurotrophic signals for serotonergic and dopaminergic development.

    Iwakura Y, Nawa H

    Neuro2013  2013年6月  日本神経科学学会、日本神経化学会

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    記述言語:日本語   会議種別:ポスター発表  

    開催地:国立京都国際会館  

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  • Regulated processing / release of neuregulin-1 precursors in rat cortical neurons.

    Iwakura Y, Wang R, Araki K, Nawa H

    第35回日本分子生物学会年会  2012年12月  日本分子生物学会

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    記述言語:英語   会議種別:シンポジウム・ワークショップ パネル(公募)  

    開催地:福岡国際会議場  

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  • Regulated processing / release of neuregulin-1 precursors in rat cortical neurons.

    Iwakura Y, Wang R, Araki K, Nawa H

    第34回日本神経科学学会  2011年9月  日本神経科学学会

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    記述言語:英語   会議種別:ポスター発表  

    開催地:パシフィコ横浜  

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  • Dopamine D1 receptor-induced signaling through TrkB receptors in striatal neurons

    Iwakura Y, Nawa H, Sora I, Chao MV

    第51回日本神経化学会  2008年9月  日本神経化学会

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    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:富山国際会議場  

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  • Neurotrophic effects of EGF/ErbB1 signals on developing midbrain dopaminergic neurons.

    Iwakura Y, Zhen Y, Piao YS, Yokomaku D, Aoki H, Takei N, Nawa H

    Neuro2007  2007年9月  日本神経科学学会、日本神経化学会

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    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:パシフィコ横浜  

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受賞

  • 日本神経化学会奨励賞

    2012年9月   日本神経化学会  

    岩倉百合子

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    受賞区分:学会誌・学術雑誌による顕彰  受賞国:日本国

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共同研究・競争的資金等の研究

  • ペリニューロナルネット調節を介したGABA神経への脳内栄養因子の作用機序の解明

    2018年4月 - 2021年3月

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    岩倉百合子, 難波寿明, 武井延之

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    担当区分:研究代表者  資金種別:競争的資金

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  • ペリニューロナルネット調節を介したGABA神経への脳内栄養因子の作用機序の解明

    2017年4月 - 現在

    科学研究費補助金 

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    資金種別:競争的資金

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  • セロトニン神経路の発達・成熟に対する栄養因子の作用機序の解明

    2013年4月 - 2016年3月

    日本学術振興会  科学研究費助成事業  若手研究(B)

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    資金種別:競争的資金

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  • ニューレグリンとセロトニン伝達の相互作用

    2012年12月 - 現在

    民間財団等  内藤記念女性研究者研究助成金 

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    資金種別:競争的資金

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  • 神経栄養因子ニューレグリン1の神経伝達物質依存的な切断・放出とその生理的意義

    2012年4月 - 2014年3月

    日本学術振興会  科学研究費助成事業  若手研究(B)

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    資金種別:競争的資金

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  • ニューレグリンとモノアミン伝達の相互作用

    2011年4月 - 2012年3月

    民間財団等  上原生命科学財団 研究奨励金 

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    資金種別:競争的資金

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  • モノアミン神経の発達・成熟に対する栄養因子の作用機序の解明

    2010年 - 現在

    科学研究費補助金 

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    資金種別:競争的資金

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  • 上皮成長因子EGFファミリーと神経伝達物質のクロストーク

    2007年2月 - 現在

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    資金種別:競争的資金

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  • ドパミンによる脳由来神経栄養因子(BDNF)受容体(TrkB)のトランスアクティベーション

    2005年4月 - 2008年

    その他の研究制度 

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    資金種別:競争的資金

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  • 脳由来神経栄養因子TrkBのドパミンによるトランスアクティベーションメカニズムの解明

    2005年4月 - 2007年3月

    民間財団等  上原生命科学財団 海外留学助成金 

    岩倉百合子

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    担当区分:研究代表者  資金種別:競争的資金

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  • 脳内サイトカインによるシナプス発達阻害機構

    2003年4月 - 2005年3月

    科学研究費助成事業  特別研究員推奨費

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    資金種別:競争的資金

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  • ドパミン刺激によるEGF/ErbB1シグナルの制御

    2002年 - 2005年

    科学研究費補助金 

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    資金種別:競争的資金

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担当経験のある授業科目(researchmap)

  • 医学研究実習

    機関名:新潟大学

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  • 先端医科学研究概説

    機関名:新潟大学

     詳細を見る

  • 先端医科学研究概説

    機関名:新潟大学

     詳細を見る

  • 脳と心の医科学

    機関名:新潟大学

     詳細を見る

  • 分子生物学

    機関名:新潟大学

     詳細を見る

  • 医学入門

    機関名:新潟大学

     詳細を見る

  • 脳と心の医科学

    機関名:新潟大学

     詳細を見る

  • 医学入門

    機関名:新潟大学

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  • 統合臨床医学

    機関名:新潟大学

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担当経験のある授業科目

  • 統合臨床医学

    2018年
    機関名:新潟大学

  • 医学入門

    2017年
    -
    2018年
    機関名:新潟大学

  • 分子生物学

    2016年
    -
    現在
    機関名:新潟大学

  • 脳と心の医科学

    2016年
    -
    2017年
    機関名:新潟大学

  • 先端医科学研究概説

    2012年
    -
    2013年
    機関名:新潟大学

  • 医学研究実習

    2010年
    -
    現在
    機関名:新潟大学

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社会貢献活動

  • スーパーサイエンスハイスクール 実習/研修受け入れ

    役割:講師, 実演

    2017年8月

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    対象: 高校生

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  • 世界脳週間

    役割:講師, 助言・指導, 運営参加・支援, 実演

    新潟大学脳研究所  2008年3月 - 現在

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    対象: 高校生

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  • スプリングサイエンスキャンプ

    役割:講師, 運営参加・支援, 実演

    2008年3月 - 2015年3月

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    対象: 高校生

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学術貢献活動

  • 文部科学省科学技術政策研究所 科学技術動向研究センター 専門調査員

    役割:学術調査立案・実施

    文部科学省科学技術政策研究所 科学技術動向研究センター  2014年 - 現在

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    種別:学術調査 

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