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Exploring genetic factors that define TDP-43 pathological polymorphisms in ALS.

Research Project

Project/Area Number 21K07272
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionNiigata University

Principal Investigator

Ishihara Tomohiko  新潟大学, 脳研究所, 特任准教授 (70612232)

Co-Investigator(Kenkyū-buntansha) 他田 真理  新潟大学, 脳研究所, 准教授 (30646394)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsALS / TDP-43 / エクソーム解析 / テキストマイニング / 筋萎縮性側索硬化症 / 人工知能 / 病理多型
Outline of Research at the Start

筋萎縮性側索硬化症(amyotrophic lateral sclerosis: ALS)の病態機序に則った治療法開発が望まれている.ALSは遺伝性・孤発性を含めて多くの症例で遺伝子変異が同定されている.孤発性ALSは病理学的にはTDP-43蛋白質陽性細胞質内封入体の中枢神経内の広がりによるType 1, 2a, 2b の病理多型があり,認知症の有無,生命予後に関与するが,この病理学的特徴を規定する因子は不明である.本研究はALSの中枢神経由来DNAを用い,網羅的遺伝子解析により,ALSの病理多型への稀な遺伝子多型の集積する遺伝子の関与の有無を検討することを目的とする.

Outline of Final Research Achievements

The aim of this study was to perform a comprehensive genetic analysis (exome analysis) using DNA from amyotrophic lateral sclerosis (ALS) autopsy cases to identify factors that define TDP-43 pathological polymorphism. In 3 years of this study period, we performed exome analysis in 23 new cases. In this analysis, including 137 previously analyzed cases, we found mutations in specific exons of gene X in 9 cases. These 9 cases were rapidly progressive with poor prognosis (median survival: 15 months), and 5 cases showed TDP-Type2a pathology. Thus, the mutation may be a determinant of the type of pathology and prognosis.

Academic Significance and Societal Importance of the Research Achievements

ALSは根治的治療が未開発の進行性運動神経変性疾患である。本邦の症例はおよそ10,000人と推測され、多くの例では3-5年で死亡ないし持続的な人工呼吸器使用が必要となる。一方で本疾患の進行速度は症例により多様であり、急速進行例から10年以上の長期経過例までさまざまである。ALSでは30以上の原因遺伝子が同定されており、遺伝性背景の重要な疾患である。本研究で実施した進行速度に影響しうる遺伝子的背景を解析することは、その病態生理の理解、予後評価、治療法開発に貢献しうるものである。

Report

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

    (4 results)

All 2024 2023 2022

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

  • [Journal Article] Slow disease progression and characteristic TDP-43 inclusions in a patient with familial amyotrophic lateral sclerosis carrying a TARDBP G357S variant2024

    • Author(s)
      Sainouchi, M. Oginezawa, S. Tada, M. Ishihara, T. Onodera, O. Kakita, A.
    • Journal Title

      Neuropathol Appl Neurobiol

      Volume: 50 Issue: 1

    • DOI

      10.1111/nan.12966

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Accuracy of a machine learning method based on structural and locational information from AlphaFold2 for predicting the pathogenicity of TARDBP and FUS gene variants in ALS2023

    • Author(s)
      Hatano Yuya、Ishihara Tomohiko、Onodera Osamu
    • Journal Title

      BMC Bioinformatics

      Volume: 24 Issue: 1

    • DOI

      10.1186/s12859-023-05338-5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Endogenous human retrovirus-K is not increased in the affected tissues of Japanese ALS patients2022

    • Author(s)
      Ishihara Tomohiko、Koyama Akihide、Hatano Yuya、Takeuchi Ryoko、Koike Yuka、Kato Taisuke、Tada Mari、Kakita Akiyoshi、Onodera Osamu
    • Journal Title

      Neuroscience Research

      Volume: 178 Pages: 78-82

    • DOI

      10.1016/j.neures.2022.01.009

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] MOVA: A method of missense variant pathogenicity usingAlphaFold22023

    • Author(s)
      石原 智彦
    • Organizer
      Human Genetics Asia 2023(HGA2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2021-04-28   Modified: 2025-11-21  

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