Updated on 2025/07/01

写真a

 
RATANOV MIKHAIL
 
Organization
Brain Research Institute Center for Integrated Human Brain Science Specially Appointed Assistant
Title
Specially Appointed Assistant
External link

Degree

  • PhD ( 2027.9   Niigata University )

  • Neurology (residency) ( 2020.7 )

  • General medicine (MD) ( 2018.6 )

Research Interests

  • neuroscience

  • neuroinflammation

  • glial

  • glia

  • videonystagmography

  • video-oculography

  • oculomotor

  • oculomotor disorders

  • electroencephalography

  • epilepsy

  • vertigo

  • dizziness

  • neurodegenerative diseases

  • neurodegeneration

  • positron emission tomography

  • alzheimer's disease

  • dementia

  • cognitive neuroscience

  • neurology

Research Areas

  • Life Science / Cognitive and brain science  / dementia; Alzheimer's; positron emission tomography; glia; glial; neuroinflammation

Research History (researchmap)

  • Niigata University   Brain Research Institute Center for Integrated Human Brain Science   Specially Appointed Assistant

    2024.10

      More details

    Country:Japan

    researchmap

  • Niigata University   Brain Research Institute Center for Integrated Human Brain Science Department of Functional Neurology and Neurosurgery   Intern

    2023.6 - 2023.8

      More details

    Country:Japan

    researchmap

Research History

  • Niigata University   Center for Integrated Human Brain Science, Brain Research Institute   Specially Appointed Assistant

    2024.10

Education

  • Research Center of Neurology   Neurology (residency)

    2018.9 - 2020.8

      More details

    Country: Russian Federation

    researchmap

  • Sechenov University   General medicine (MD)

    2012.9 - 2018.8

      More details

    Country: Russian Federation

    researchmap

  • Niigata University   Graduate School of Medical and Dental Sciences   Graduate School of Medical and Dental Sciences, Doctoral Program of Biological Functions and Medical Control

    2023.10

      More details

    Country: Japan

    researchmap

 

Papers

  • Relation between resting amygdala activity and cardiovascular events in patients with cardiac sarcoidosis. International journal

    Sou Otsuki, Masahiro Hatakeyama, Atsushi Michael Kimura, Kosei Nakamura, Mikhail Ratanov, Rie Akagawa, Hironori Furuse, Naomasa Suzuki, Yasuhiro Ikami, Yuki Hasegawa, Masaomi Chinushi, Hitoshi Shimada, Takayuki Inomata

    European journal of nuclear medicine and molecular imaging   2025.4

     More details

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

    PURPOSE: Previous studies indicate amygdala activity (AmygA) measured by FDG-positron emission tomography (PET) predicts the risk of subsequent cardiovascular events. However, AmygA measurement use for predicting the prognosis of patients with cardiac sarcoidosis (CS) is unknown. We aimed to investigate the association between AmygA and cardiovascular events in patients with CS. METHODS: Consecutive 40 patients with CS who underwent FDG-PET were identified retrospectively. Cardiovascular events included ventricular tachyarrhythmias and heart failure hospitalizations. We examined the association between AmygA and cardiovascular events and investigated the timing of FDG-PET influence on AmygA measurements. RESULTS: During a follow-up of 4.5 (2.5-7.7) years, 14 (35%) patients experienced cardiovascular events. Left-AmygA was a stronger cardiovascular event predictor than the Right-AmygA, and incidences were significantly higher in the high left-AmygA group than low group (log-rank P = 0.018). Multivariable analysis revealed left-AmygA augmentation (hazard ratio [HR]: 1.76 per 0.1 increase, 95% confidence interval [CI]: 1.12-2.87, P = 0.016) was the only independent predictor of cardiovascular event. Among the 40 patients, 32 underwent multiple PET-scans. No significant difference was found between the AmygA value on the first PET-scan and the mean on multiple PET scans, and the correlation coefficient was 0.93 (P < 0.001). Multivariate analyses revealed the mean left-AmygA value was the only independent predictor of cardiovascular event (P = 0.011). CONCLUSIONS: High left-AmygA was associated with the higher rates of cardiovascular events in patients with CS. AmygA would be a prognostic biomarker regardless of the PET-scan timing.

    DOI: 10.1007/s00259-025-07266-3

    PubMed

    researchmap

  • A case of cerebral amyloid angiopathy with ipsilateral tau and contralateral amyloid PET uptake related to cadaveric dura mater implanted in childhood. International journal

    Yuki Hatakeyama, Atsushi Michael Kimura, Shintaro Tsuboguchi, Mikhail Ratanov, Kosei Nakamura, Masahiro Hatakeyama, Yukimi Nakamura, Masaki Watanabe, Yoshihiro Murakami, Yuko Saito, Shigeo Murayama, Kensaku Kasuga, Takeshi Ikeuchi, Hironaka Igarashi, Osamu Onodera, Hitoshi Shimada

    European journal of nuclear medicine and molecular imaging   2024.12

     More details

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

    DOI: 10.1007/s00259-024-07030-z

    PubMed

    researchmap

  • Cardiovascular remodeling as a result of fibroblast growth factor-23 (FGF-23)/Klotho imbalance in patients with CKD. International journal

    Ludmila Yu Milovanova, Marina V Taranova, Svetlana Yu Milovanova, Lidia V Kozlovskaya Lysenko, Anastasia I Pasechnik, Vasiliy V Kozlov, Vladimir D Beketov, Alexey V Volkov, Mikhail Ratanov

    International urology and nephrology   54 ( 7 )   1613 - 1621   2022.7

     More details

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

    BACKGROUND: In chronic kidney disease (CKD) cardiovascular remodeling (CVR) is very frequent compared with general population and, as suppose, may be associated with «new» renal risk factors. The aim of study was to estimate association of new serum biomarkers (FGF-23, Klotho) and traditional biomarker of cardiac damage-serum Troponin I (sTr-I) with signs of CVR. METHODS: One hundred thirty CKD G1-5D patients without cardiovascular disease (CVD) clinical manifestation were included. We measured serum FGF-23, Klotho and sTr-I. The instrumental methods were: echocardiography, SphygmoCor test [Pulse Wave Velocity (PWV), Central (aortic) Blood Pressure (CBP), Subendocardial Blood Supply (SBS)]. RESULTS: FGF-23 level correlated with: sTr-I (r = 0.512; p < 0.01), eccentric left ventricular hypertrophy, LVH (r = 0.543; p < 0.01), SBS (r = - 0.499; p < 0.05). There were no differences of FGF-23 level in patients with normal and high CBP. Klotho correlated with concentric LVH (r = - 0.451; p < 0.01), PWV (r = - 0.667; p < 0.001), Cardiac Calcification Score, CCS (r = - 0.581; p < 0.01). Multivariate analysis revealed positive independent association of FGF-23 with eccentric LVH (OR = 1.036, 95% CI (1.004-1.068); p = 0.038). Klotho was a negative determinant for concentric LVH (OR = 0.990, 95% CI 0.987-0.994; p < 0.001), increased PWV (OR = 0.984, 95% CI (0.977-0.991); p < 0.001) and CCS (OR = 0.991, 95% CI (0.988-0.995); p < 0.001). In addition, multivariate analysis revealed a relationship between serum Klotho (OR = 0.980, 95% CI (0.964-0.996); p = 0.016), FGF-23 (OR = 3.145, 95% CI (1.020-9.695); p = 0.046) and troponin I level. CONCLUSION: In CKD patients without CVD clinical manifestation increased serum FGF-23 level and decreased Klotho are associated with CVR: FGF-23 with eccentric LVH (independently of CBP), Klotho determinate concentric LVH, PWV and CCS. Moderately elevated sTr-I levels may be a manifestation of FGF-23/Klotho imbalance in CKD.

    DOI: 10.1007/s11255-021-03046-8

    PubMed

    researchmap

  • Uncovering bilateral vestibulopathy in patients with SANDO syndrome caused by mutations in POLG gene: a case series. International journal

    Alexandra Belyakova-Bodina, Mikhail Ratanov, Erich Schneider, Yury Seliverstov, Evgenii Nuzhnyi, Sergey Klyushnikov, Amayak Broutian

    Journal of neurology   268 ( 10 )   3909 - 3912   2021.10

     More details

  • SEMIOLOGY OF EPILEPTIC SEIZURES AND BRAIN ASYMMETRY Reviewed

    Belyakova-Bodina A.I., Chernysheva Y.V., Ratanov M.Y., Broutian A.G.

    Journal of asymmetry   13 ( 4 )   97 - 111   2019.12

     More details

    Language:Russian   Publishing type:Research paper (scientific journal)   Publisher:Scientific Center of Neurology  

    В диагностике эпилепсии важное место отводится описанию симптомов эпилептических приступов иктальной семиологии. Иктальные симптомы, или знаки, главным образом подразделяются на локализационные и латерализационные. Среди последних отдельное место занимают знаки, указывающие на реализацию приступов доминантным или субдоминантным полушарием. Проведен анализ работ, в которых исследовалась латерализационная значимость тех или иных иктальных знаков в контексте доминантности полушарий. В данном обзоре описаны такие симптомы эпилептических приступов, как питье воды, улыбка, нарушение речи и другие, опираясь преимущественно на исследования, в которых локализация эпилептогенной зоны доказывалась ремиссией после резективной операции. Несмотря на недостаточную статистическую значимость отдельных латерализационных знаков, сочетание нескольких знаков, говорящих в пользу одного и того же полушария, позволяет повысить точность определения эпилептогенной зоны, что у пациентов с фармакорезистентной эпилепсией может улучшить исход последующего хирургического лечения.

    ctal semiology describes signs and symptoms of epileptic seizures, also known as ictal signs. Most commonly, ictal signs are divided into localizing and lateralizing ones. Among the latter, signs lateralizing to dominant or nondominant hemisphere are of remarkable interest. We analyzed the studies on the lateralizing value of various ictal signs in regard to hemisphere dominance. This review covers periictal water drinking, smile, speech disturbances and other ictal signs. Studies with seizure freedom as a result of resective surgery were of higher priority. Even though particular ictal signs may have insufficient statistical significance, their combinations might improve the accuracy of epileptogenic zone identification, which is crucial for surgical treatment of drugresistant epilepsy.

    DOI: 10.25692/asy.2019.13.4.011

    researchmap

Presentations

  • Corticobasal syndrome mimicking Foix-Chavany-Marie syndrome with suggested 4-repeat tauopathy by tau PET

    Kosei Nakamura, Yasuko Kuroha, Masahiro Hatakeyama, Mikhail Ratanov, Atsushi Michael Kimura, Yukimi Nakamura, Yoshihiro Murakami, Masaki Watanabe, Hironaka Igarashi, Tetsuya Takahashi, Hitoshi Shimada

    13th NIPS-PRI-BRINU Joint Symposium  2024.2 

     More details

    Language:English   Presentation type:Poster presentation  

    researchmap

  • A clinical case of persistent postural-perceptual dizziness Invited

    Mikhail Ratanov

    Conference of the Clinic of Nervous Diseases  2022.6 

     More details

    Language:Russian   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Migraine screening in oncohematologic patients with ID Migraine™ questionnaire

    Iaroslav Skiba, Alexey Polushin, Mikhail Ratanov, Maria Vladovskaya, Alexandr Kulagin

    International Headache Congress 2021  2021.9 

     More details

    Language:English   Presentation type:Poster presentation  

    researchmap

Research Projects

  • Elucidation of the mechanisms of age-related alternations in the brain environment

    Grant number:23K27516

    2023.4 - 2027.3

    System name:Grants-in-Aid for Scientific Research

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

    Awarding organization:Japan Society for the Promotion of Science

      More details

    Grant amount:\18460000 ( Direct Cost: \14200000 、 Indirect Cost:\4260000 )

    researchmap

 

Social Activities

  • Public event for citizens by the Center for Integrated Human Brain Science (Brain Research Institute, Niigata University)

    Role(s): Presenter, Media coverage, Advisor, Planner, Contribution

    2025.3

     More details