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Elucidation of the mechanism of substantia nigra astroglial cell activation by metabolic reactive oxygen species and identification of its regulator

Research Project

Project/Area Number 18K06702
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 47040:Pharmacology-related
Research InstitutionFukushima Medical University

Principal Investigator

Ogura Masato  福島県立医科大学, 医学部, 講師 (10548978)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords活性酸素種 / ミトコンドリア / アポトーシス / アストログリア細胞 / 神経細胞死 / 神経変性疾患 / プロテオーム / 低分子化合物 / シグナル伝達 / 質量分析 / 分泌因子 / 細胞死
Outline of Final Research Achievements

Reactive oxygen species (ROS) are implicated in the modulation of diverse processes including glial activation. To evaluate the effect of metabolic ROS produced by mitochondria on astrocyte activation, we created transgenic (Tg) mice expressing a phosphorylation-defective mutant of succinate dehydrogenase A in astrocytes (aSDHAY215F). Astrocytes in substantia nigra of in male aSDHAY215F mice produced more ROS than those in control mice, and increased the levels of GFAP expression. On the other hands, TH-positive neurons were significantly reduced. We identified several secretion factors from the aSDHAY215F mice as a inducer of neuronal apoptosis. These results suggest that mitochondrial ROS may regulate dopaminergic neuronal death in substantia nigra through modulation of astrocyte activation.

Academic Significance and Societal Importance of the Research Achievements

アストログリア細胞の活性化はパーキンソン病を含む神経変性疾患の発症に深く関わることが知られているが、その分子メカニズムに関してよく理解されていない。本研究により、代謝性活性酸素種がアストログリア細胞の活性化を引き起こし、神経細胞死を惹起する新規分泌タンパク質発現を誘導することを見出した。また粘菌由来新規代謝物質PQAの投与によりその発現が抑制され、細胞死が抑制されることが判明した。これらの結果は、活性酸素種がアストログリア細胞の活性を調節することにより神経細胞死を制御すること、さらには、PQA物質によりその活性化を制御できる可能性を示している。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (6 results)

All 2021 2020 2019 Other

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

  • [Journal Article] Prenylated quinolinecarboxylic acid compound-18 prevents sensory nerve fiber outgrowth through inhibition of the interleukin-31 pathway2021

    • Author(s)
      Ogura Masato、Endo Kumiko、Suzuki Toshiyuki、Homma Yoshimi
    • Journal Title

      PLOS ONE

      Volume: 16 Issue: 2 Pages: e0246630-e0246630

    • DOI

      10.1371/journal.pone.0246630

    • NAID

      130008001229

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Astrocyte-Derived Exosomal microRNA miR-200a-3p Prevents MPP +-Induced Apoptotic Cell Death Through Down-Regulation of MKK42020

    • Author(s)
      Norshalena Shakespear, Masato Ogura, Junko Yamaki, Yoshimi Homma
    • Journal Title

      Neurochem Res.

      Volume: 45 Issue: 5 Pages: 1020-1033

    • DOI

      10.1007/s11064-020-02977-5

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Prenylated quinolinecarboxylic acid derivative prevents neuronal cell death through inhibition of MKK42019

    • Author(s)
      Ogura Masato、Kikuchi Haruhisa、Shakespear Norshalena、Suzuki Toshiyuki、Yamaki Junko、Homma Miwako K.、Oshima Yoshiteru、Homma Yoshimi
    • Journal Title

      Biochemical Pharmacology

      Volume: 162 Pages: 109-122

    • DOI

      10.1016/j.bcp.2018.10.008

    • NAID

      120006821695

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] プレニルキノリンカルボン酸誘導体-18は、インターロイキン31経路の阻害を通して知覚神経線維の成長を抑制する2021

    • Author(s)
      Masato Ogura, Kumiko Endo, Toshiyuki Suzuki and Yoshimi Homma
    • Organizer
      第94回日本薬理学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Prenylated quinolinecarboxylic acid derivative prevents neuronal cell death through inhibition of MKK42019

    • Author(s)
      Ogura Masato、Kikuchi Haruhisa、Shakespear Norshalena、Suzuki Toshiyuki、Yamaki Junko、Homma Miwako K.、Oshima Yoshiteru、Homma Yoshimi
    • Organizer
      第92回日本薬理学会年会
    • Related Report
      2018 Research-status Report
  • [Remarks] 福島県立医科大学医学部附属生体情報伝達研究所生体物質研究部門ホームページ

    • URL

      https://www.fmu.ac.jp/home/biomol/HTML/index.html

    • Related Report
      2020 Annual Research Report 2019 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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