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Analysis of altered RNA behavior induced by neurodegeneration-associated cytoplasmic protein aggregation.

Research Project

Project/Area Number 19K16259
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionHiroshima University

Principal Investigator

Yasuda Kyota  広島大学, 統合生命科学研究科(理), 助教 (40816344)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsALS / FUS / RNA localization / Translation regulation / VCP / MAP7 / LLPS / タンパク質凝集 / ATP / 微小管 / RNA-seq / RNA局在 / 翻訳制御 / 局所的翻訳 / 神経変性 / 液-液相分離 / 光技術
Outline of Research at the Start

複数の神経変性疾患に共通する病理的所見としてRNA結合タンパク質による細胞質での凝集体形成がある。しかし凝集体形成が疾患を惹起する分子機構は不明であった。申請者はこれまでRNAの細胞内局在とその局所的翻訳制御機構に着眼して研究を行い、凝集体形成が特定のRNAの細胞内局在を撹乱すること、また凝集体では内包RNAの翻訳が活性化していることを見出した。本研究ではタンパク質の細胞質内異常凝集が神経変性疾患発症へと至る分子機構をRNA局在およびその翻訳制御機構の異常に着目して解明することで、神経変性疾患発症の根本的メカニズムの理解と局所的タンパク質供給が持つ神経細胞の形態・機能維持への役割解明を目指す。

Outline of Final Research Achievements

The cytoplasmic protein aggregation found in amyotrophic lateral sclerosis (ALS) is still unclear in its relationship to pathogenesis. This study targeted FUS, one of the proteins undergoes ALS-associated cytoplasmic aggregation. Previous studies have shown that FUS aggregation promotes abnormal activation of RNA translation within the FUS aggregates. In this study, we mainly searched for factors that cause ectopic translation and analyzed their functions relating to ectopic translation. The main finding is involvement of VCP in FUS aggregation and ectopic translation. In brief, ALS-related mutation to FUS reduce the interaction between VCP protein and FUS protein. This reduction of VCP-FUS interaction disrupts the regulation of FUS aggregation by VCP. VCP regulates FUS phase separation through consuming ATP around FUS. We also found that the ectopic translation was alleviated by VCP overexpression.

Academic Significance and Societal Importance of the Research Achievements

ALSは進行性の神経変性疾患の1つであり、最終的に呼吸筋麻痺に至る重篤な症状を示す。現在も多くの研究が病態解明を目指しているが、根本的な治療法は確立されていない。本研究では、ALS発症メカニズム解明を目的とし、ALSの病理的特徴であるFUSタンパク質凝集がRNAの翻訳制御異常を引き起こす仕組みに着目した。結果、VCPタンパク質によるFUS相分離制御機構が存在し、ALS関連変異がこれを阻害することを見出した。VCPの過剰発現が凝集による異常な翻訳活性化を緩和することを示唆するデータも得た。これらの成果は、細胞内でのFUS相分離制御機構を新たに提唱するとともに、ALS治療法確立にも一石を投じる。

Report

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

    (14 results)

All 2022 2021 2019 Other

All Int'l Joint Research (5 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results)

  • [Int'l Joint Research] Seoul National University/UNIST(韓国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] 米国立衛生研究所(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] ソウル大学(韓国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] 米国立衛生研究所(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] ソウル大学(韓国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Valosin‐containing protein (VCP) regulates the stability of fused in sarcoma (FUS) granules in cells by changing ATP concentrations2022

    • Author(s)
      Yasuda Kyota、Watanabe Tomonobu M.、Kang Myeong‐Gyun、Seo Jeong Kon、Rhee Hyun‐Woo、Tate Shin‐ichi
    • Journal Title

      FEBS Letters

      Volume: - Issue: 11 Pages: 1412-1423

    • DOI

      10.1002/1873-3468.14353

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Linking substrate and nucleus via actin cytoskeleton in pluripotency maintenance of mouse embryonic stem cells2019

    • Author(s)
      David Brit Gracy、Fujita Hideaki、Yasuda Kyota、Okamoto Kazuko、Panina Yulia、Ichinose Junya、Sato Osamu、Horie Masanobu、Ichimura Taro、Okada Yasushi、Watanabe Tomonobu M
    • Journal Title

      Stem Cell Research

      Volume: 41 Pages: 101614-101614

    • DOI

      10.1016/j.scr.2019.101614

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Translational regulation of protrusion-localized RNAs involves silencing and clustering after transport2019

    • Author(s)
      Moissoglu Konstadinos、Yasuda Kyota、Wang Tianhong、Chrisafis George、Mili Stavroula
    • Journal Title

      eLife

      Volume: 8 Pages: 1-31

    • DOI

      10.7554/elife.44752

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] VCP modulates the dynamic assembly/disassembly of ALS-related FUS inclusions through ATP consumption in murine fibroblast.2022

    • Author(s)
      安田恭大
    • Organizer
      日本薬学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] VCPによるATPを介した筋萎縮性側索硬化症関連FUSタンパク質顆粒の形成制御2022

    • Author(s)
      安田恭大
    • Organizer
      第13回日本生物物理学会 中四国支部大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 細胞局所でのタンパク質発現制御とヒト疾患の関係2021

    • Author(s)
      Kyota Yasuda
    • Organizer
      第5回 HiHA(Hiroshima Research Center for Healthy Aging) Young Researchers Workshop (Webinar)
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Possible molecular entity for misdirected local translation caused by ALS-related inclusion formation identified with novel photo-activatable ligand.2019

    • Author(s)
      安田恭大
    • Organizer
      日本分子生物学会
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 細胞質内での液-液層分離現象を制御する時期・部位特異的因子の探索2019

    • Author(s)
      安田恭大
    • Organizer
      日本生物物理学会第11回中国四国支部大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 細胞局所におけるRNAの振る舞いと液-液相分離現象2019

    • Author(s)
      安田恭大
    • Organizer
      インド-日本合同セミナー
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited

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

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