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development of a method to analyze local organelle function in situ

Research Project

Project/Area Number 19K22509
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 48:Biomedical structure and function and related fields
Research InstitutionUniversity of Fukui

Principal Investigator

Matsuoka Satoshi  福井大学, 学術研究院医学系部門, 教授 (00263096)

Co-Investigator(Kenkyū-buntansha) 竹内 綾子  福井大学, 学術研究院医学系部門, 准教授 (00378704)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsミトコンドリア / 膜電位 / 微小電極 / オルガネラ
Outline of Research at the Start

インタクトな細胞においてオルガネラ機能は細胞内位置により異なると考えられるが、その定量的評価は極めて困難である。本研究では、インタクトな細胞におけるミトコンドリアとリソソームの機能を評価できる『超極細微小電極-蛍光イメージング法』を開発する。すなわち、インタクトな心筋細胞からミトコンドリアとリソソームの膜電位を超極細微小電極で測定する。そして同じ細胞から、ミトコンドリア内Ca2+やROS、ミトコンドリア近傍のATPやCa2+、リソソーム内pHやリソソーム近傍のCa2+を蛍光イメージングにより同時評価する。本手法の開発で、ミトコンドリア・リソソーム機能の細胞内部位による違いが明らかになる。

Outline of Final Research Achievements

There is no way to measure directly mitochondrial membrane potential in living cells. We aimed to develop a new micropipette method to measure directly mitochondrial membrane potential. After the improvement of experimental equipment, selection of proper glass capillary, adjustment of puller and selection of proper mitochondria-specific fluorescence dye, we tried direct measurement of mitochondrial membrane potential in living cardiomyocytes with microelectrodes. However, a large negative membrane potential corresponding to mitochondrial membrane potential could not be detected. The possible reasons are damage and depolarization of mitochondria by the microelectrodes, or non-penetration of microelectrodes through mitochondrial inner/outer membrane. It seems, however, possible to measure directly mitochondrial membrane potential with cells having giant mitochondria.

Academic Significance and Societal Importance of the Research Achievements

ミトコンドリア膜電位の直接測定を可能にするために行った測定機器の改良、ガラス電極の選定、電極作成装置の調整、ミトコンドリア染色蛍光色素の選定等の情報は、今後の展開への貴重な資料となる。また、より大きなミトコンドリアを有する細胞を用いることで、生細胞のミトコンドリア膜電位の直接測定は可能であるとの見通しが立った点は意義がある。

Report

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

    (21 results)

All 2022 2021 2020 2019 Other

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (11 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Remarks (4 results)

  • [Journal Article] Impact of mitochondria on local calcium release in murine sinoatrial nodal cells2022

    • Author(s)
      Takeda Yukari、Matsuoka Satoshi
    • Journal Title

      Journal of Molecular and Cellular Cardiology

      Volume: 164 Pages: 42-50

    • DOI

      10.1016/j.yjmcc.2021.11.006

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Physiological and Pathophysiological Roles of Mitochondrial Na+-Ca2+ Exchanger, NCLX, in Hearts2021

    • Author(s)
      Takeuchi Ayako、Matsuoka Satoshi
    • Journal Title

      Biomolecules

      Volume: 11 Issue: 12 Pages: 1876-1876

    • DOI

      10.3390/biom11121876

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Minor contribution of NCX to Na+-Ca2+ exchange activity in brain mitochondria2021

    • Author(s)
      Takeuchi Ayako、Matsuoka Satoshi
    • Journal Title

      Cell Calcium

      Volume: 96 Pages: 102386-102386

    • DOI

      10.1016/j.ceca.2021.102386

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Membrane current evoked by mitochondrial Na+?Ca2+ exchange in mouse heart2020

    • Author(s)
      Islam Mohammed M.、Takeuchi Ayako、Matsuoka Satoshi
    • Journal Title

      The Journal of Physiological Sciences

      Volume: 70 Issue: 1 Pages: 24-24

    • DOI

      10.1186/s12576-020-00752-3

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Integration of mitochondrial energetics in heart with mathematical modelling2020

    • Author(s)
      Takeuchi Ayako、Matsuoka Satoshi
    • Journal Title

      The Journal of Physiology

      Volume: 598 Issue: 8 Pages: 1443-1457

    • DOI

      10.1113/jp276817

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Physiological functions of mitochondrial Na+-Ca2+ exchanger, NCLX, in lymphocytes2020

    • Author(s)
      Takeuchi Ayako、Kim Bongju、Matsuoka Satoshi
    • Journal Title

      Cell Calcium

      Volume: 85 Pages: 102114-102114

    • DOI

      10.1016/j.ceca.2019.102114

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] A simulation analysis of Na+ and Ca2+ dynamics in cardiomyocyte during ischemia and reperfusion. A simulation study of cardiac ischemia and reperfusion2021

    • Author(s)
      Satoshi Matsuoka, Takao Shimayoshi and Ayako Takeuchi.
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] A simulation study of cardiac ischemia and reperfusion2021

    • Author(s)
      Satoshi Matsuoka, Takao Shimayoshi and Ayako Takeuchi
    • Organizer
      2021 Cardiac Physiome Workshop
    • Related Report
      2021 Annual Research Report
  • [Presentation] Contributions of NCLX and NCX to mitochondrial Na+-Ca2+ exchange in mouse brain2021

    • Author(s)
      Ayako Takeuchi, Satoshi Matsuoka
    • Organizer
      第98回日本生理学会大会・第126回日本解剖学会総会・全国学術集会 合同大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Membrane current evoked by mitochondrial Na+-Ca2+ exchange in mouse heart2021

    • Author(s)
      Satoshi Matsuoka, Mohammed Moinul Islam, Ayako Takeuchi
    • Organizer
      第11回入澤宏・彩記念 JPS心臓・循環論文賞(入澤記念循環賞)受賞講演 第98回日本生理学会大会・第126回日本解剖学会総会・全国学術集会 合同大会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Impact of mitochondria on local calcium release in murine sinoatrial nodal cells2021

    • Author(s)
      Yukari Takeda, Satoshi Matsuoka
    • Organizer
      第98回日本生理学会大会・第126回日本解剖学会総会・全国学術集会 合同大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Spatial and functional associations of mitochondria and local calcium release in murine sinoatrial nodal cells2020

    • Author(s)
      Yukari Takeda, Satoshi Matsuoka
    • Organizer
      NIPS International Workshop 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] マウス洞房結節細胞におけるlocal Ca2+ release とミトコンドリアの関係2020

    • Author(s)
      竹田有加里、松岡達
    • Organizer
      第67回 中部日本生理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] Electrophysiological measurement of mitochondrial Na+-Ca2+ exchange in mouse heart2020

    • Author(s)
      Mohammed Moinul Islam, Ayako Takeuchi, Satoshi Matsuoka
    • Organizer
      64th Biophysical meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Characteristics of Ca2+ efflux from mitochondria2020

    • Author(s)
      Ayako Takeuchi, Mohammed Moinul Islam, Satoshi Matsuoka
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Property and roles of mitochondrial Na+-Ca2+ exchange in heart2019

    • Author(s)
      Satoshi Matsuoka, Mohammed M. Islam, Yukari Takeda, Ayako Takeuchi
    • Organizer
      50th NIPS international symposium「MIRACLES」In Cardiovascular Physiology
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Electrogenicity of mitochondrial Na+-Ca2+ exchange in mouse heart2019

    • Author(s)
      Mohammed Moinul Islam、 竹内綾子、 松岡達
    • Organizer
      第66回中部日本生理学会
    • Related Report
      2019 Research-status Report
  • [Remarks] Integrative and Systems Physiology

    • URL

      http://isphysio.med.u-fukui.ac.jp/

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
  • [Remarks] 統合生理学(生理学2)

    • URL

      https://www.med.u-fukui.ac.jp/laboratory/integrative/

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
  • [Remarks] Department of Integrative and Systems Physiology

    • URL

      http://isphysio.med.u-fukui.ac.jp/index.html

    • Related Report
      2019 Research-status Report
  • [Remarks] 統合生理学

    • URL

      https://www.med.u-fukui.ac.jp/laboratory/integrative/

    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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