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Distorted neurocomputation by a small number of extra-large spines in psychiatric disorders

Research Project

Project/Area Number 20H03347
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Hayashi-Takagi Akiko  国立研究開発法人理化学研究所, 脳神経科学研究センター, チームリーダー (60415271)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2021: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2020: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Keywords樹状突起スパイン / 統合失調症 / XLスパイン / 超線形神経演算 / 精神疾患 / マルチスケール / NEURONシミュレーション / 神経演算 / 樹状突起演算 / シナプス / シナプトパチー / 超非線形加算
Outline of Research at the Start

統合失調症の病態生理に興奮性シナプスが関与すると考えられているが、シナプス病態の詳細、例えば、各シナプスの大きさ・強度(≒樹状突起スパインサイズ)、スパイン密度、樹状突起上にどのようにスパインが分布するかなどの定量的知見は非常に少ない。さらに脳の作動原理という観点で見た場合、これらのシナプス異常があると、樹状突起の演算機能や神経発火にどのような影響が生じるか全く未解明である。そこで、グルタミン酸アンケージングによるスパイン刺激を行いながら、樹状突起イベントと神経発火の詳細な時系列データを計測・解析することで、統合失調モデルマウスにおける、シナプス、樹状突起、神経発火との関係に迫る。

Outline of Final Research Achievements

Human genetics strongly support the involvement of synaptopathy in psychiatric disorders. However, trans-scale causality linking synapse pathology to behavioral changes is lacking. To address this question, we examined the effects of synaptic inputs on dendrites, and cells of mice with knockdown of SETD1A and DISC1, which are validated animal models of schizophrenia. Both models exhibited an overrepresentation of extra large (XL) synapses, which evoked supralinear synaptic integration, resulting in increased neuronal firing. Our findings suggest that the synaptopathy of schizophrenia is shaped by distorted dendritic and somatic integration via extra-large spines.

Academic Significance and Societal Importance of the Research Achievements

従来の知見から、統合失調症の病態生理には何らかのシナプス機能の変調が関係する可能性が濃厚と考えられていましたが、その具体的なメカニズムは未解明であった。本研究では、統合失調症モデルマウスのグルタミン酸シナプス機能を、シナプスから行動まで多階層に検証することにより、非常に強いシナプス(巨大スパイン)の出現が病態生理を担うことを示した。これは新しい仮説であり、少なくとも一部の統合失調症群に関しては、新たな治療戦略を開発する必要があることを示唆した。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (14 results)

All 2023 2022 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (9 results) (of which Int'l Joint Research: 5 results,  Invited: 8 results) Book (1 results)

  • [Journal Article] To fire or not to fire: decisions mediated by localized processing and dendritic spikes2023

    • Author(s)
      Hayashi-Takagi Akiko
    • Journal Title

      Nature Reviews Neuroscience

      Volume: 24 Issue: 4 Pages: 194-194

    • DOI

      10.1038/s41583-023-00682-0

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Constructive understanding of multi-scale dynamism of psychiatric disorders2022

    • Author(s)
      Hayashi-Takagi Akiko
    • Journal Title

      Neuroscience Research

      Volume: 175 Pages: 1-2

    • DOI

      10.1016/j.neures.2022.01.004

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optical interrogation of multi-scale neuronal plasticity underlying behavioral learning2021

    • Author(s)
      Tsutsumi Shinichiro、Hayashi-Takagi Akiko
    • Journal Title

      Current Opinion in Neurobiology

      Volume: 67 Pages: 8-15

    • DOI

      10.1016/j.conb.2020.07.002

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Multi-Scale Understanding of NMDA Receptor Function in Schizophrenia2020

    • Author(s)
      Hyun Jo Soo、Inoue Takafumi、Hayashi-Takagi Akiko
    • Journal Title

      Biomolecules

      Volume: 10 Issue: 8 Pages: 1172-1172

    • DOI

      10.3390/biom10081172

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Multi-scale and multi-modal synaptic analysis for psychiatric research2022

    • Author(s)
      Hayashi-Takagi A
    • Organizer
      NEURO2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Multi-scale synaptic analysis for psychiatric disorders2022

    • Author(s)
      Hayashi-Takagi A
    • Organizer
      Society for Neuroscience
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Extra-large spines distort neuronal computation in synaptic disorders.2021

    • Author(s)
      Hayashi-Takagi A
    • Organizer
      Translational Neuroscience Program (TNP) Seminar, Pittsuburg Univ
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Extra-large spines distort neuronal computation in synaptic disorders.2021

    • Author(s)
      Hayashi-Takagi A
    • Organizer
      Seminar, Medical University of South Carolina
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Extra-large spines distort neuronal computation in synaptic disorders.2021

    • Author(s)
      Hayashi-Takagi A
    • Organizer
      第44回日本神経科学大会・CJK第1回国際会議
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 最先端イメージングで迫る精神疾患シナプス病態研究2021

    • Author(s)
      林 朗子
    • Organizer
      Psychiatry Symposium(関西医科大学主催)
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] なぜ樹状突起スパインのサイズが重要なのか?2021

    • Author(s)
      林 朗子
    • Organizer
      第43回日本生物学的精神医学会・第51回日本神経精神薬理学会 合同大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 最先端イメージングで迫る精神疾患シナプス病態研究2021

    • Author(s)
      林 朗子
    • Organizer
      第117回日本精神神経学会学術総会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 樹状突起演算と精神疾患2021

    • Author(s)
      林 朗子
    • Organizer
      千里ライフサイエンスセミナー
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Book] 「心の病」の脳科学 なぜ生じるのか、どうすれば治るのか2023

    • Author(s)
      林(高木) 朗子、加藤 忠史
    • Total Pages
      288
    • Publisher
      講談社
    • ISBN
      4065283639
    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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