• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

二光子顕微鏡による光刺激と二重FRET観察技術の開発とシナプス構造可塑性の解析

Publicly Offered Research

Project AreaMutli-dimensional fluorescence live imaging of cellular function and molecular activity
Project/Area Number 25113726
Research Category

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

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionThe Institute of Physical and Chemical Research

Principal Investigator

実吉 岳郎  独立行政法人理化学研究所, 脳科学総合研究センター, 研究員 (00556201)

Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Fiscal Year 2014: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Keywordsシナプス / スパイン / アクチン / シナプス可塑性
Outline of Annual Research Achievements

本研究計画は、シナプス構造可塑性におけるアクチン細胞骨格制御の分子機構解明のため、2光子顕微鏡を用いた光による分子機能操作と分子活性測定を同時に行う方法論の確立を目指した。CaMKII-TIAM1相互作用とCaMKII酵素活性の同時可視化を試みた。分割GFPの再構成は、再構成されたGFPが不可逆的であるため、融合タンパク質側の結合の履歴は示せるものの、観察時点での結合を意味しない。また、二量体形成依存的GFPやRFP由来の蛍光は可逆的であったが、どちらもスパインでの二光子イメージングでは暗く検出が難しかった。結果としてTIAM1との結合を担保したCaMKII活性の検出は結果として成功しなかった。一方、TIAM1-CaMKII相互作用の詳細を明らかした。CaMKIIはTIAM1とアミノ酸1543-1557で相互作用し、その結合様式はグルタミン酸受容体NR2Bサブユニットと同様なT-site結合であった。つまり、CaMKIIはTIAM1との結合によりCaMKIIの構造を活性化型に固定されるため、TIAM1結合CaMKIIがカルシウム・カルモデュリンに依存しない酵素活性を示すことがわかった。また、単一スパインでのRac活性の蛍光寿命測定顕微鏡法での可視化、Rac活性化のメカニズムの解析に成功し、Rac活性は、NMDA受容体、CaMKII、TIAM1に依存的であること、刺激後30分以上持続することがわかった。

Research Progress Status

26年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

26年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2014 Annual Research Report
  • 2013 Annual Research Report
  • Research Products

    (9 results)

All 2015 2014 2013

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results,  Acknowledgement Compliant: 3 results) Presentation (5 results)

  • [Journal Article] A Naturally Occurring Null Variant of the NMDA Type Glutamate Receptor NR3B Subunit Is a Risk Factor of Schizophrenia2015

    • Author(s)
      Matsuno H, Ohi K, Hashimoto R, Yamamori H, Yasuda Y, Fujimoto M, Yano-Umeda S, Saneyoshi T, Takeda M, Hayashi Y
    • Journal Title

      PLoS One

      Volume: 10(3) Issue: 3 Pages: e0116319-e0116319

    • DOI

      10.1371/journal.pone.0116319

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Structural and molecular remodeling of dendritic spine substructures during long-term potentiation.2014

    • Author(s)
      Bosch M, Castro J, Saneyoshi T, Matsuno H, Sur M, Hayashi Y.
    • Journal Title

      Neuron

      Volume: 82(2) Issue: 2 Pages: 444-59

    • DOI

      10.1016/j.neuron.2014.03.021

    • Related Report
      2014 Annual Research Report 2013 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Synapse reorganization-a new partnership revealed.2014

    • Author(s)
      Saneyoshi T, Hayashi Y.
    • Journal Title

      EMBO J.

      Volume: 33(12) Pages: 1292-4

    • DOI

      10.1002/embj.201488619

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Synapse reorganization--a new partnership revealed.2014

    • Author(s)
      Saneyoshi T, Hayashi Y.
    • Journal Title

      EMBO Journal

      Volume: In press

    • Related Report
      2013 Annual Research Report
  • [Presentation] Conversion of a transient Ca2+ signaling into a persistent structural modification of dendritic spines by CaMKII/TIAM complex formation during synaptic plasticity.2015

    • Author(s)
      Takeo Saneyoshi
    • Organizer
      MDFLI 2015
    • Place of Presentation
      京都 国立京都国際会館
    • Year and Date
      2015-01-26 – 2015-01-28
    • Related Report
      2014 Annual Research Report
  • [Presentation] Conversion of a transient Ca2+ signaling into a persistent structural modification of dendritic spines by CaMKII/TIAM complex formation during synaptic plasticity.2014

    • Author(s)
      Takeo Saneyoshi, Hitomi Matsuno, Nathan Hedrick, Hideji Murakoshi, Ryohei Yasuda, and Yasunori Hayashi
    • Organizer
      SfN 2014
    • Place of Presentation
      米国 ワシントンDC
    • Year and Date
      2014-11-15 – 2014-11-19
    • Related Report
      2014 Annual Research Report
  • [Presentation] Persistent Interaction Between CaMKII and TIAM1 during structural plasticity of single dendritic spines.2014

    • Author(s)
      Takeo Saneyoshi
    • Organizer
      FENS 2014
    • Place of Presentation
      イタリア ミラノ市
    • Year and Date
      2014-07-05 – 2014-07-09
    • Related Report
      2014 Annual Research Report
  • [Presentation] Regulation of synapse structural plasticity using photoactivatable signaling proteins2013

    • Author(s)
      Saneyoshi T., Hayashi Y.
    • Organizer
      Neuro2013
    • Place of Presentation
      京都
    • Related Report
      2013 Annual Research Report
  • [Presentation] Persistent Interaction between CaMKII and TIAM1 during long-term potentiation2013

    • Author(s)
      Saneyoshi T., Hayashi Y.
    • Organizer
      US-Japan Symposium on Neuronal plasticity
    • Place of Presentation
      Seattle, USA
    • Related Report
      2013 Annual Research Report

URL: 

Published: 2013-05-15   Modified: 2019-07-29  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi