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Elucidation of metabolism-excitation-contraction coupling in cardiomyocytes through metabolic imaging

Research Project

Project/Area Number 19H03400
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 48020:Physiology-related
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)
竹田 有加里  福井大学, 学術研究院医学系部門, 助教 (20582159)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2020: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2019: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywordsミトコンドリア / 代謝 / 心臓 / 興奮収縮連関 / 数理モデル / 数理解析 / 心室筋細胞 / 洞房結節細胞
Outline of Research at the Start

心臓の拍動には大量のエネルギーが必要であり、心臓の代謝状態や代謝産物は、エネルギー供給にかかわる重要な因子である。申請者は、エネルギー代謝基質であるピルビン酸が、エネルギー供給のみならず心室筋細胞や洞房結節細胞機能に積極的に関与する可能性を見出した。本研究は、代謝状態や代謝産物が心筋細胞の代謝-興奮-収縮連関を制御する分子メカニズムを明らかにするために、単一細胞代謝イメージングと細胞機能との同時測定、ならび包括的心筋細胞数理モデル構築、解析を行うものである。

Outline of Final Research Achievements

We succeeded in recording membrane current generated by mitochondrial Na+-Ca2+ exchange for the first time, and demonstrated that mitochondrial Na+-Ca2+ exchange is electrogenic and voltage-dependent. We demonstrated that a part of Ca2+ transported by mitochondrial Na+-Ca2+ exchange to the outside of mitochondria enters sarcoplasmic reticulum, then affects Ca2+ release from sarcoplasmic reticulum and frequency of the action potential generation of sinoatrial node cells (automaticity). We developed a new mathematical model of cardiomyocyte including H+ flux across mitochondria and intracellular pH regulation.

Academic Significance and Societal Importance of the Research Achievements

ミトコンドリアNa+-Ca2+交換に起因する膜電流測定に成功した。これは、ミトコンドリアNa+-Ca2+交換の起電性と膜電位依存性についての長年の議論に終止符を打つ発見である。また、心臓のペースメーカ部位である洞房結節の自動能は、古くは細胞膜の電気現象として説明されていたが、細胞内のミトコンドリアも自動能発生に関わることを明らかにした。

Report

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

    (26 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 (16 results) (of which Int'l Joint Research: 4 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 Annual Research 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 Annual Research 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
      2020 Annual Research Report 2019 Annual Research 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 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] A simulation analysis of Na+ and Ca2+ dynamics in cardiomyocyte during ischemia and reperfusion2022

    • 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
      Physiome Workshop
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 心筋虚血・再灌流の数理モデル解析2021

    • Author(s)
      松岡達,嶋吉隆夫,竹内綾子
    • Organizer
      第68 回 中部日本生理学会
    • 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 Annual Research 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 Annual Research Report
    • Invited
  • [Presentation] Impact of mitochondria on local calcium release in murine sinoatrial nodal cells2021

    • Author(s)
      Yukari Takeda, Satoshi Matsuoka
    • 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 Annual Research 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 Annual Research Report
  • [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 Annual Research Report
  • [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 Annual Research Report
  • [Presentation] Mitochondrial contribution to automaticity of murine sinoatrial nodal cells2020

    • Author(s)
      Yukari Takeda & Satoshi Matsuoka
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2019 Annual Research 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 Annual Research Report
    • Int'l Joint Research
  • [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 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Mitochondria are involved in automaticity of murine sinoatrial nodal cells2019

    • Author(s)
      Yukari Takeda, Satoshi Matsuoka
    • Organizer
      50th NIPS international symposium「MIRACLES」In Cardiovascular Physiology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [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 Annual Research Report
  • [Presentation] 脳ミトコンドリアからのCa2+排出におけるNCLXおよびNCXの寄与2019

    • Author(s)
      竹内綾子、松岡達
    • Organizer
      第66回中部日本生理学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 脳ミトコンドリアからのCa2+排出メカニズム2019

    • Author(s)
      竹内綾子、松岡達
    • Organizer
      第4回イオンチャネル研究会
    • Related Report
      2019 Annual Research Report
  • [Remarks] Integrative and Systems Physiology

    • URL

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

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

    • URL

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

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

    • URL

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

    • Related Report
      2019 Annual Research Report

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

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