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Analysis of newly molecular pathogenesis of Parkinson's disease focusing on insolubilization of causal proteins

Research Project

Project/Area Number 22K15399
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49010:Pathological biochemistry-related
Research InstitutionGakushuin University

Principal Investigator

SHIIBA ISSHIN  学習院大学, 理学部, 助教 (30884481)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsパーキンソン病 / Parkin / ミトコンドリア / MITOL / ユビキチンリガーゼ / ユビキチン / アグリソーム / MITOL/MARCHF5 / MITOL/MARCH5
Outline of Research at the Start

パーキンソン病の分子病態について未解明な点が多い。申請者はこれまでに、パーキンソン病原因遺伝子産物Parkinが細胞死を誘導すること、その抑制系としてParkinを分解するミトコンドリア外膜局在性の酵素MITOLを同定し、分子病態の一端を明らかにしてきた。この研究過程において新たに、Parkinが高度に凝集、不溶化し細胞死を誘導することを見出した。本研究ではこの点をさらに追求し、Parkin誘導性細胞死の分子機構ならびにその抑制機構を分子・個体レベルで解明する。本研究の成果により、新たなパーキンソン病の分子病態が捉えられると共に、病態に準じた治療薬候補の同定が期待される。

Outline of Final Research Achievements

A pathological feature of Parkinson's disease (PD) is the progressive loss of dopaminergic neurons and decreased dopamine (DA) content in the substantia nigra pars compacta in PD brains. The mechanisms by which parkin, a familial Parkinson’s disease gene product, protects the adult human brain from Parkinson's disease remain incompletely unknown. In this study, we especially focused on insoluble Parkin as a critical factor inducing neuronal cell death and its protective machinery.

Academic Significance and Societal Importance of the Research Achievements

今回、パーキンソン病の新たな分子病態として、パーキンソン病の原因は不溶性Parkinの蓄積である可能性が示唆されました。また、不溶性Parkinを分解する酵素としてミトコンドリア外膜上に局在するMITOLを同定し、さらに詳細な分解経路も明らかにすることができました。今後、不溶性Parkinの除去を標的とした創薬開発が期待されます。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (4 results)

All 2024 2023 2022

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

  • [Journal Article] Protective roles of MITOL against myocardial senescence and ischemic injury partly via Drp1 regulation2022

    • Author(s)
      Tokuyama T、Uosaki H、Sugiura A、Nishitai G、Takeda K、Nagashima S、Shiiba I、Ito N、Amo T、Mohri S、Nishimura A、Nishida M、Konno A、Hirai H、Ishido S、Yoshizawa T、Shindo T、Takada S、Kinugawa S、Inatome R、Yanagi S
    • Journal Title

      iScience

      Volume: 25 Issue: 7 Pages: 104582-104582

    • DOI

      10.1016/j.isci.2022.104582

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] MITOL regulates phosphatidic acid-binding activity of RMDN3/PTPIP512022

    • Author(s)
      Ito Naoki、Takahashi Takara、Shiiba Isshin、Nagashima Shun、Inatome Ryoko、Yanagi Shigeru
    • Journal Title

      The Journal of Biochemistry

      Volume: 171 Issue: 5 Pages: 529-541

    • DOI

      10.1093/jb/mvab153

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] The Development of Organelle Contact Sites Quantification Tool and Exploration of the New Role of ER-Mitochondria Contact2024

    • Author(s)
      Isshin Shiiba
    • Organizer
      Keystone Symposia (Organelle Membrane Contact Sites in Health and Disease)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] he development of organelle contact sites quantification tool and exploration of the new role of haraguroER-mitochondria contact sites2023

    • Author(s)
      1.Isshin Shiiba
    • Organizer
      YU-COE(C) Intracellular Iron Symposium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2022-04-19   Modified: 2025-01-30  

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