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Development of novel Mg2+ imaging technique and measurement of Mg2+ concentration changes in cultured glial cells.

Research Project

Project/Area Number 17K13268
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Chemical biology
Research InstitutionKeio University

Principal Investigator

Shindo Yutaka  慶應義塾大学, 理工学部(矢上), 特任助教 (30449029)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords蛍光イメージング / マグネシウム / アストロサイト / グリア細胞 / シグナル伝達
Outline of Final Research Achievements

In this study, I developed novel technique to measure intracellular Mg2+ concentration changes based on fluorescent resonance energy transfer (FRET) between a fluorescent protein and KMG-104-AsH, which is a Mg2+-selective fluorescent probe we developed before. This technique enables us to quantitatively visualize changes in Mg2+ concentration in intracellular specific areas on demand.
By using it and other KMG probes, I checked whether neurotransmitters affect Mg2+ concentration in astrocyte, which is a kind of glial cells. I demonstrated that GABA and serotonin induce changes in Mg2+ concentration in cultured rat astrocytes.

Academic Significance and Societal Importance of the Research Achievements

Mg2+は細胞内代謝やエネルギー産生を制御することが近年示され、その細胞内外での濃度変化に注目が集まりつつあるイオンである。特に脳神経系では、主要な神経伝達物質であるグルタミン酸によるシナプス伝達がシナプス間隙のMg2+濃度の影響を受けることが知られている。本研究で開発した手法は、細胞内外の任意の箇所でMg2+濃度変化を測定でき、このイオンの挙動を詳細に調べることに大変役に立つ。また、神経細胞を取り巻くアストロサイトはその活動自体や細胞外イオン濃度の調節により神経伝達に影響を与える細胞であり、本研究で見出された、内部のMg2+濃度変化は脳神経系の情報伝達に何らかの影響を及ぼすものと考えられる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (5 results)

All 2018 2017

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (3 results)

  • [Journal Article] GABA-Induced Intracellular Mg2+ Mobilization Integrates and Coordinates Cellular Information Processing for the Maturation of Neural Networks2018

    • Author(s)
      Ryu Yamanaka, Yutaka Shindo, Kohji Hotta, Koji Suzuki, Kotaro Oka
    • Journal Title

      Current Biology

      Volume: 28 Issue: 24 Pages: 3984-3991

    • DOI

      10.1016/j.cub.2018.10.044

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Transient Rise in Free Mg 2+ Ions Released from ATP-Mg Hydrolysis Contributes to Mitotic Chromosome Condensation2018

    • Author(s)
      Maeshima Kazuhiro、Matsuda Tomoki、Shindo Yutaka、Imamura Hiromi、Tamura Sachiko、Imai Ryosuke、Kawakami Syoji、Nagashima Ryosuke、Soga Tomoyoshi、Noji Hiroyuki、Oka Kotaro、Nagai Takeharu
    • Journal Title

      Current Biology

      Volume: 28 Issue: 3 Pages: 444-451

    • DOI

      10.1016/j.cub.2017.12.035

    • NAID

      120006380520

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] FRETを用いた細胞内局所のマグネシウムイオンイメージング2018

    • Author(s)
      新藤豊、山中龍、鈴木孝治、堀田耕司、岡浩太郎
    • Organizer
      日本ケミカルバイオロジー学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 細胞内局所でのマグネシウムイオンのFRETイメージング2018

    • Author(s)
      新藤豊、山中龍、鈴木孝治、堀田耕司、岡浩太郎
    • Organizer
      日本バイオイメージング学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 局在化プローブを用いた細胞内マグネシウムイオンのFRETイメージング2017

    • Author(s)
      新藤豊、山中龍、鈴木孝治、堀田耕司、岡浩太郎
    • Organizer
      日本バイオイメージング学会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2020-03-30  

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