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Reconstitution of synaptic plasticity in vitro

Research Project

Project/Area Number 19K06885
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionNagoya University (2020-2021)
Kyoto University (2019)

Principal Investigator

HOSOKAWA TOMOHISA  名古屋大学, 理学研究科, 講師 (30602883)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsシナプス可塑性 / シナプス / 液-液相分離 / 受容体 / 記憶 / 長期増強 / 液-液相分離 / 液液相分離
Outline of Research at the Start

神経細胞同士を接続し情報交換を行うシナプスの構造と性質を理解することは神経科学の長年の課題である。興味深いことに、その情報伝達効率は静的なものではなく、学習や刺激に応じてダイナミックな変化を遂げる。その「シナプス可塑性」は脳の記憶といった高次機能を生み出していると同時に神経変性疾患や精神疾患を引き起こす脆弱性の元にもなっている。 我々はシナプス可塑性の本質が、様々な蛋白質のシナプス内への集積やシナプス外への離散であることを明らかにした。そこで本研究では、シナプス可塑性をin vitroで再現することでそのメカニズムを明らかにし、記憶、学習、神経疾患にアプローチする。

Outline of Final Research Achievements

In this study, we examined the hypothesis that CaMKII has a role to crosslink postsynaptic proteins to stabilize on postsynaptic density, like a “hub”. In 2018, Hong Kong university of Science and Technology (HKUST) reported that the postsynaptic density is the highly dynamic condensate of postsynaptic proteins via liquid-liquid phase separation (LLPS). We focused on the possibility that CaMKII undergoes LLPS to form protein condensate and started a collaboration with HKUST. We revealed that excitatory stimulation triggers the activation of CaMKII and the sustained formation of protein condensate with GluN2B via LLPS. Furthermore, the formation of protein condensate on postsynaptic density resulted in the modulation of nano-scale localization of postsynaptic proteins such as stargazin. This result demonstrates a novel mechanism of synaptic plasticity and memory formation.

Academic Significance and Societal Importance of the Research Achievements

本課題では代表的なシナプスタンパク質CaMKIIの新たな役割を同定した。これまでその高すぎる発現量や必要性の不明な12量体構造が長らく議論の対象となってきたが、我々の発見した新たな役割、すなわち液-液相分離により蛋白質を凝縮する役割によってこれらの必然性を合理的に説明できるようになった。この凝縮により伝達物質受容体のナノスケール局在が調節されており、効率的な情報伝達を実現している。このことはシナプス可塑性と記憶形成の新たなメカニズムを示唆している。また凝縮の促進または抑制によって神経疾患への医学的応用が期待される。この成果は2021年のNature Neuroscienceに発表した。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (16 results)

All 2021 2020 Other

All Int'l Joint Research (4 results) Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (6 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results)

  • [Int'l Joint Research] 香港科学技術大学(中国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] ボルドー大学(フランス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] 香港科学技術大学(中国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] ボルドー大学(フランス)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Novel mechanism of synaptic plasticity mediated by CaMKII2021

    • Author(s)
      林 康紀、細川 智永、劉 品吾、實吉 岳郎
    • Journal Title

      生化学

      Volume: 93 Issue: 2 Pages: 191-202

    • DOI

      10.14952/SEIKAGAKU.2021.930191

    • ISSN
      0037-1017
    • Year and Date
      2021-04-25
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] CaMKII activation persistently segregates postsynaptic proteins via liquid phase separation2021

    • Author(s)
      Hosokawa Tomohisa、Liu Pin-Wu、Cai Qixu、Ferreira Joana S.、Levet Florian、Butler Corey、Sibarita Jean-Baptiste、Choquet Daniel、Groc Laurent、Hosy Eric、Zhang Mingjie、Hayashi Yasunori
    • Journal Title

      Nature Neuroscience

      Volume: not yet Issue: 6 Pages: 777-785

    • DOI

      10.1038/s41593-021-00843-3

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Regulation of the Stability and Localization of Post-synaptic Membrane Proteins by Liquid-Liquid Phase Separation2021

    • Author(s)
      Hosokawa Tomohisa、Liu Pin-Wu
    • Journal Title

      Frontiers in Physiology

      Volume: 12 Pages: 795757-795757

    • DOI

      10.3389/fphys.2021.795757

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Regulation of synaptic nanodomain by liquid?liquid phase separation: A novel mechanism of synaptic plasticity2021

    • Author(s)
      Liu Pin-Wu、Hosokawa Tomohisa、Hayashi Yasunori
    • Journal Title

      Current Opinion in Neurobiology

      Volume: 69 Pages: 84-92

    • DOI

      10.1016/j.conb.2021.02.004

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Shank3 Binds to and Stabilizes the Active Form of Rap1 and HRas GTPases via Its NTD-ANK Tandem with Distinct Mechanisms2020

    • Author(s)
      Cai Qixu、Hosokawa Tomohisa、Zeng Menglong、Hayashi Yasunori、Zhang Mingjie
    • Journal Title

      Structure

      Volume: 28 Issue: 3 Pages: 290-300.e4

    • DOI

      10.1016/j.str.2019.11.018

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Arc self‐association and formation of virus‐like capsids are mediated by an N‐terminal helical coil motif2020

    • Author(s)
      Eriksen MS, Nikolaienko O, Hallin EI, Grodem S, Bustad HJ, Flydal MI, Merski I, Hosokawa T, Lascu D, Akerkar S, Cuellar J, Chambers JJ, O'Connell R, Muruganandam G, Loris R, Touma C, Kanhema T, Hayashi Y, Stratton MM, Valpuesta JM, Kursula P, Martinez A, Bramham CR.
    • Journal Title

      The FEBS Journal

      Volume: 288 Issue: 9 Pages: 2930-2955

    • DOI

      10.1111/febs.15618

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Modification of physical properties and reconstruction of postsynaptic density by liquid-liquid phase separation2021

    • Author(s)
      Tomohisa Hosokawa, Pin-Wu Liu, Makoto Kinoshita
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Calcium-induced persistent formation of protein condensate on Post-Synaptic Density by liquid-liquid phase separation2021

    • Author(s)
      Tomohisa Hosokawa, Pin-Wu Liu, Makoto Kinoshita, Yasunori Hayashi
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] CaMKIIの液-液相分離によるグルタミン酸受容体のシナプス内分離2020

    • Author(s)
      細川 智永、劉 品吾、林 康紀
    • Organizer
      Neuroscience2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] CaMKIIの液液相分離によるグルタミン酸受容体のシナプス内区画化2020

    • Author(s)
      細川 智永、劉 品吾、林 康紀
    • Organizer
      第63回日本神経化学会大会
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Subsynaptic segregation of glutamate receptors by CaMKII-mediated liquid-liquid phase separation2020

    • Author(s)
      Tomohisa Hosokawa
    • Organizer
      Neuroscience2020
    • Related Report
      2019 Research-status Report
  • [Presentation] Subsynaptic segregation of glutamate receptors by CaMKII-mediated liquid-liquid phase separation2020

    • Author(s)
      Tomohisa Hosokawa
    • Organizer
      Japan Neurochemistry
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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