• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study of pathogenic mechanism of amyotrophic lateral sclerosis through excessive recrutiment of RNA-binding protein FUS

Research Project

Project/Area Number 20K16489
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Yokoi Satoshi  名古屋大学, 医学系研究科, 特任助教 (30815460)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords筋萎縮性側索硬化症 / シナプス / アンチセンスオリゴ / iPS細胞由来運動神経 / iPS細胞 / CRISPR/Cas9 / FUS
Outline of Research at the Start

筋萎縮性側索硬化症(ALS)は根治薬のない難治性の神経変性疾患である。日本の遺伝性ALSの原因遺伝子であるfused-in sarcoma(FUS)はRNA結合蛋白質である。マウスから得られた、FUSのシナプス蛋白質のRNA制御機構に基づき、シナプス蛋白質の遺伝子に新規変異があるALS患者を抽出し、iPS細胞由来運動神経を用いてFUSが引き起こすRNAの代謝異常を解明する。詳細な機構がわかれば、RNA代謝異常を是正する化合物を開発し、治療薬開発に結び付ける。

Outline of Final Research Achievements

In order to investigate whether the synaptic protein SynGAP could be pathogenic for amyotrophic lateral sclerosis(ALS), we found a novel variant in SynGAP 3'UTR from the JaCALS database. We inserted this variant into iPS cells and differenciated to motor neurons. We found that this variant causes splicing of SynGAP and a decrease in the number of synapses. Furthermore, FUS and hnRNPK are excessively recruited to SynGAP mRNA by this mutation. Antisense oligonucleotides whicht block hnRNPK binding site could recover the number of synapses. These data suggested that novel SynGAP variant causes early pathology of ALS, and excessive recrutiment of RNA-binding proteins could be a novel pathological mechanism of ALS.

Academic Significance and Societal Importance of the Research Achievements

未だに発症原因が解明されていない筋萎縮性側索硬化症において、本研究はシナプスタンパク質が病態に関わっており、さらにRNA結合蛋白質の過結合がシナプス異常を引き起こすスプライシング異常にかかわっていることも初めて発見した。さらに過結合を是正するアンチセンスオリゴがシナプス異常を是正できた。これらの知見は、治療薬がない筋萎縮性側索硬化症の今後の治療薬開発において、ごく局所のRNA代謝異常をターゲットにする重要性が示唆された。

Report

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

    (3 results)

All 2021 2020

All Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] SynGAP 3'UTR mutation from ALS cohort causes aberrant FUS-SynGAP mRNA regulation and spine formation2021

    • Author(s)
      横井聡, 伊藤卓治, 佐橋健太郎, 中村亮一, 石垣診祐, 熱田直樹、勝野雅央, 岡田洋平,祖父江元
    • Organizer
      第62回日本神経学会学術大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] An ALS patient SynGAP 3’UTR variant at the FUS binding site causes aberrant SynGAP splicing and spine abnormalities by recruiting hnRNPK2021

    • Author(s)
      横井聡, 伊藤卓治, 佐橋健太郎, 中村亮一, 石垣診祐, 熱田直樹、勝野雅央, 岡田洋平,祖父江元
    • Organizer
      PACTALS 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] SynGAP 3'UTR mutation from ALS cohort causes aberrant FUS-SynG AP mRNA regulation and spine formation2020

    • Author(s)
      Satoshi Yokoi, Takuji Ito, Kentaro Sahashi, Ryoichi Nakamura, Shinsuke Ishigaki, Naoki Atsuta, Masahisa Katsuno, Yohei Okada, Gen Sobue
    • Organizer
      第61回日本神経学会学術大会
    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi