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Genetic analysis of CHCHD2 in ALS cohorts

Research Project

Project/Area Number 20K16504
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionJuntendo University

Principal Investigator

Ikeda Aya  順天堂大学, 大学院医学研究科, 助教 (70867796)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsCHCHD2 / ミトコンドリア / CHCHD10 / 筋萎縮性側索硬化症 / ALS / Mitochondria / 筋萎縮性側索硬化症 (ALS)
Outline of Research at the Start

筋萎縮性側索硬化症 (ALS)は、有効な治療法のない神経難病疾患の一つである。CHCHD10は、ALSや前側頭葉型認知症の原因遺伝子として知られている。今回我々は、CHCHD10の相同遺伝子であるCHCHD2もまたALSの原因遺伝子になりうるという仮説を立て、ALS患者に対しCHCHD2のスクリーニング解析を施行した。結果、新規のバリアントを同定し、患者の脳病理を取得した。本研究では新規のバリアントをもつALS患者の剖検脳や疾患モデルを用いて、CHCHD protein familyがALS発症にどのように関係しているのかを明らかにし、新規の分子標的療法の開発へと展開することを目指す。

Outline of Final Research Achievements

CHCHD2 P14L was dissociated form the mitochondria to the cytoplasm, which was observed in both SH-SY5Y cells as well as Drosophila dopaminergic and motor neurons. CHCHD2 P14L showed reduced mitochondria Ca2+ uptake and elevated cytoplasmic Ca2+ flux, which was observed in both SH-SY5Y cells and Drosophila neuron terminals. Moreover, elevated cytoplasmic Ca2+ promoted TDP-43 processing and insolubilization.

Academic Significance and Societal Importance of the Research Achievements

CHCHD2 T61I変異の病理学的な解 析としては、CHCHD2 T61Iがα-Synucleinの異常な凝集に関わることを患者脳、iPS由来ドパ ミン神経細胞、ショウジョウバエ、マウスのモデルで示した (申請者ら. Hum Mol Genet, 2019、 Kee et al. Hum Mol Genet, 2022)。今回、CHCHD2変異がALSで発見されたことで、PDとALS発症の分子経路を同定することが期待され、ミトコンドリアを標的とした分子標的治療の開発につながる可能性がある。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (5 results)

All 2023 2022 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (4 results)

  • [Journal Article] Neurodegeneration-associated mitochondrial proteins, CHCHD2 and CHCHD10-what distinguishes the two?2022

    • Author(s)
      Aya Ikeda
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 10 Pages: 1-12

    • DOI

      10.3389/fcell.2022.996061

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] The research of a mitochondrial protein CHCHD2 that is associated with Amyotrophic lateral sclerosis and Parkinson’s disease2023

    • Author(s)
      池田彩
    • Organizer
      日本神経学会学術大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] The research of a mitochondrial protein CHCHD2 that is associated with Amyotrophic lateral sclerosis and Parkinson’s disease2022

    • Author(s)
      Aya Ikeda
    • Organizer
      神経学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] Two novel variants in CHCHD2 associate with TDP-43 pathology among amyotrophic lateral sclerosis2021

    • Author(s)
      池田彩
    • Organizer
      日本神経学会学術大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Mutational and functional analysis of the CHCHD2 gene in amyotrophic lateral sclerosis2020

    • Author(s)
      池田彩
    • Organizer
      第61回日本神経学会学術大会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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