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Regulation of synapses by perisynaptic glia(Fostering Joint International Research)

Research Project

Project/Area Number 15KK0340
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research)

Allocation TypeMulti-year Fund
Research Field Neurochemistry/Neuropharmacology
Research InstitutionUniversity of Yamanashi

Principal Investigator

Shigetomi Eiji  山梨大学, 大学院総合研究部, 助教 (00631061)

Project Period (FY) 2016 – 2019
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
Keywordsペリシナプスグリア / アストロサイト / 遺伝子改変マウス / カルシウム感受性タンパク質 / 線条体 / ドパミン / アセチルコリン / シナプス / カルシウム / カルシウム感受性タンパク / 二光子励起レーザー顕微鏡 / カルシウム感受性蛍光タンパク / 大脳皮質
Outline of Final Research Achievements

Astrocytes extend many peripheral astrocytic processes (PAP) where astrocytes closely associate and communicate with synapses. Despite its importance for synapses, mechanism underlying information processing by PAPs is still unclear due to lack of methods to visualize their activities. Here, using a novel transgenic mouse whose astrocytes express Lck-GCaMP6f, we investigated the dynamic feature of PAPs in the dorsolateral striatum (DLS). Compared to cyto-GCaMP6f, Lck-GCaMP6f detected Ca2+ signals in larger area in response to neuronal activities. Pharmacological experiments show that evoked Ca2+ signals detected by Lck-GCaMP6f is mediated by dopamine D1/D5 receptor and muscarinic receptor. Overall data show a novel mechanism underlying Ca2+ signal at PAPs which finely regulated by multiple neurotransmitters in DLS.

Academic Significance and Societal Importance of the Research Achievements

ペリシナプスグリアの活動を鋭敏に測定することにより、シナプス活動とペリシナプスグリア活動の新たな情報処理メカニズムを明らかにした点に本研究成果の学術的意義がある。シナプスにおける異常及びグリア細胞機能の変調は様々な中枢神経疾患の原因と考えられている。本方法を用いた解析により、シナプス活動とペリシナプス活動の関係性、シナプスとペリシナプス活動間の情報伝達処理機構、病態メカニズムにおけるペリシナプス活動の意義を明らかにすることにより、中枢神経疾患の新たな治療標的の発見及び治療方法の開発に繋がる知見が得られると期待される。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (7 results)

All 2020 2019 2018 2017 2016

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results)

  • [Int'l Joint Research] カリフォルニア大学ロサンゼルス校(米国)2016

    • Year and Date
      2016-08-08
    • Related Report
      2019 Annual Research Report
  • [Journal Article] グリア―ニューロン間情報発信・受信イメージング技術2019

    • Author(s)
      繁冨英治、小泉修一
    • Journal Title

      実験医学増刊

      Volume: 37 Pages: 182-188

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Neural Circuit-Specialized Astrocytes: Transcriptomic, Proteomic, Morphological, and Functional Evidence.2017

    • Author(s)
      Chai H, Diaz-Castro B, Shigetomi E, Monte E, Octeau JC, Yu X, Cohn W, Rajendran PS, Vondriska TM, Whitelegge JP, Coppola G, Khakh BS.
    • Journal Title

      Neuron

      Volume: 95 Issue: 3 Pages: 531-549

    • DOI

      10.1016/j.neuron.2017.06.029

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Neuronal hyperexcitability mediated by GqPCR-mediated signaling in astrocytes2020

    • Author(s)
      Eiji Shigetomi, Yukiho J Hirayama, Fumikazu Sano, Kenji F Tanaka, Haruhiko Bito, Schuichi Koizumi
    • Organizer
      The 93rd Annual Meeting of the Japanese Pharmacological Society
    • Related Report
      2019 Annual Research Report
  • [Presentation] Dynamic feature of bidirectional communication between neurons and astrocytes2019

    • Author(s)
      Eiji Shigetomi, Yukiho J Hirayama, Kazuhiro Ikenaka, Kenji F Tanaka, Haruhiko Bito, Schuichi Koizumi
    • Organizer
      Neuro2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Spatiotemporal analysis of neuron-astrocyte interaction by dual-color calcium imaging2018

    • Author(s)
      Eiji Shigetomi, Yukiho Hirayama, Kazuhiro Ikenaka, Kenji F Tanaka, Haruhiko Bito, Schuichi Koizumi
    • Organizer
      Cold Springs Harbor Conference: Novel Insights into Glia Function & Dysfunction
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Discovery of novel calcium signals of astrocytes in health and disease2018

    • Author(s)
      Eiji Shigetomi, Schuichi Koizumi
    • Organizer
      The second international symposium for frontend brain science of the University of Yamanashi
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2016-10-04   Modified: 2021-02-19  

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