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Macroscopic and microscopic diversity of pathogenesis in the central nervous system of patients with myotonic dystrophy type 1

Research Project

Project/Area Number 18K07515
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52020:Neurology-related
Research InstitutionHyogo Medical University

Principal Investigator

Kimura Takashi  兵庫医科大学, 医学部, 教授 (20441264)

Co-Investigator(Kenkyū-buntansha) 芳川 浩男  兵庫医科大学, 医学部, 教授 (90273680)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords筋強直性ジストロフィー / 脳 / 選択的スプライシング / スプライシング異常 / 選択的スプラシング
Outline of Final Research Achievements

Myotonic dystrophy type 1 (DM1) is caused by CTG repeats expansion, which leads to aberrant splicing. We investigated the splicing patterns in several regions of the brain and between the grey matter (GM) and white matter (WM) in DM1 patients. Compared with disease controls, the percentage of spliced-in parameter (PSI) for most of the examined exons were significantly altered in most of the brain regions of DM1 patients, except for the cerebellum. In 7 out of the 15 examined splicing events, the level of PSI change between DM1 and ALS was significantly higher in the GM than in the WM. We hypothesize that WM lesions were caused by Wallerian degeneration due to dominant aberrant splicing of the cell body.

Academic Significance and Societal Importance of the Research Achievements

筋強直性ジストロフィーでは、骨格筋症状のほか、記銘力低下などの中枢神経症状を伴う。今回、皮質に多くのスプライシング異常が存在することが分かった。このことは画像的に白質障害が主体であるという従来の報告と解離している。この解離を説明する仮説として「研究成果の概要」で述べたワーラー変性という機序以外に、白質で別のスプライシング異常が起こっている可能性も想定している。今後皮質、白質間でのスプライシング異常の網羅的解析を計画している。本研究は、皮質白質間の違いに注目した今までにない視点からのものであり、複雑な中枢神経障害の解明につながる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (9 results)

All 2020 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results)

  • [Int'l Joint Research] University of Florida/Molecular Genetics & Microbiology(米国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Differences in splicing defects between the grey and white matter in myotonic dystrophy type 1 patients2020

    • Author(s)
      Nishi Masamitsu、Kimura Takashi、Igeta Masataka、Furuta Mitsuru、Suenaga Koichi、Matsumura Tsuyoshi、Fujimura Harutoshi、Jinnai Kenji、Yoshikawa Hiroo
    • Journal Title

      PLOS ONE

      Volume: 15 Issue: 5 Pages: e0224912-e0224912

    • DOI

      10.1371/journal.pone.0224912

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Differences In Splicing Defects Between Cortex And White Matter Of Myotonic Dystrophy Type 1 Brain2019

    • Author(s)
      Nishi Masamitsu, Kimura Takashi, Furuta Mitsuru, Suenaga Koichi, Matsumura Tsuyoshi, Fujimura Harutoshi, Jinnai Kenji, Yoshikawa Hiroo
    • Organizer
      12th International Myotonic Dystrophy Consortium Meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Differences in splicing defects between cortex and white matter of Myotonic Dystrophy Type 1 brain2019

    • Author(s)
      西 将光, 木村 卓, 古田 充, 末永 浩一, 松村 剛, 藤村 晴俊, 陣内 研二, 芳川 浩男
    • Organizer
      第60回日本神経学会学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 筋強直性ジストロフィー脳におけるスプライシング異常と画像の関連2019

    • Author(s)
      木村卓
    • Organizer
      第6回筋ジストロフィーのCNS障害研究会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Differences in splicing defects between cortex and white matter of Myotonic Dystrophy Type 1 brain2019

    • Author(s)
      Masamitsu Nishi, Takashi Kimura, Mitsuru Furuta, Koichi Suenaga, Tsuyoshi Matsumura, Harutoshi Fujimura, Kenji Jinnai, Hiroo Yoshikawa
    • Organizer
      第60回日本神経学会学術大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Differences In Splicing Defects Between Cortex And White Matter Of Myotonic Dystrophy Type 1 Brain2019

    • Author(s)
      Masamitsu Nishi, Takashi Kimura, Mitsuru Furuta, Koichi Suenaga, Tsuyoshi Matsumura, Harutoshi Fujimura, Kenji Jinnai, Hiroo Yoshikawa
    • Organizer
      THE INTERNATIONAL MYOTONIC DYSTROPHY CONSORTIUM MEETING (IDMC-12)
    • Related Report
      2018 Research-status Report
  • [Presentation] Muscleblined-like protein 2 Splicing patterns in the brain of Myotonic Dystrophy Type 12018

    • Author(s)
      西 将光,木村 卓,古田 充,末永 浩一,松村 剛,藤村 晴俊,陣内 研二,芳川 浩男
    • Organizer
      第59回日本神経学会学術大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 筋強直性ジストロフィーのCNSにおけるスプライシング異常2018

    • Author(s)
      木村 卓
    • Organizer
      第5回 筋ジストロフィーのCNS障害研究会
    • Related Report
      2018 Research-status Report
    • Invited

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Published: 2018-04-23   Modified: 2022-01-27  

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