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Spatio-temporal specificity of neurodegenerative diseases with a focus on very early life stages

Research Project

Project/Area Number 20H00527
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 52:General internal medicine and related fields
Research InstitutionNagoya University

Principal Investigator

Katsuno Masahisa  名古屋大学, 医学系研究科, 教授 (50402566)

Co-Investigator(Kenkyū-buntansha) 井口 洋平  名古屋大学, 医学部附属病院, 助教 (80790659)
佐橋 健太郎  名古屋大学, 医学部附属病院, 講師 (90710103)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥45,630,000 (Direct Cost: ¥35,100,000、Indirect Cost: ¥10,530,000)
Fiscal Year 2022: ¥13,130,000 (Direct Cost: ¥10,100,000、Indirect Cost: ¥3,030,000)
Fiscal Year 2021: ¥13,130,000 (Direct Cost: ¥10,100,000、Indirect Cost: ¥3,030,000)
Fiscal Year 2020: ¥19,370,000 (Direct Cost: ¥14,900,000、Indirect Cost: ¥4,470,000)
Keywords運動ニューロン / 球脊髄性筋萎縮症 / テストステロン / 骨格筋 / Midkine-1 / 軸索 / 神経変性疾患 / 早期病態 / 転写障害 / 運動ニューロン疾患 / 神経分化 / 胎児 / ライフステージ / ミトコンドリア / シナプス / 運動 / TDP-43 / アンチセンス核酸 / RNAseq
Outline of Research at the Start

神経変性疾患に共通する病態的特徴は、特定のニューロンが選択的に変性すること(空間的特異性)および中高年以降に遅発性に発症・進行すること(時間的特異性)である。本研究では、運動ニューロン疾患を研究対象とし、マウスモデルや患者由来iPSCを用い、マルチオミクスやDREADD、脳Caイメージングなどを駆使して超早期ライフステージにおけるニューロン変性分子病態とその年齢依存性変化を解明することで、神経変性における分子病態の真の起点を明らかにする。さらに、ニューロン分化と変性の関連を解析することで、選択的ニューロン死の本質的原因を究明する。

Outline of Final Research Achievements

To elucidate the very early pathogenesis of spinal and bulbar muscular atrophy (SBMA), a motor neuron disease, and to clarify the mechanism by which this disease specifically disrupts motor neurons, we analyzed female carriers and a mouse model of SBMA. As a result, the female carriers had minor motor dysfunction, mainly neck muscle weakness, and blood and EMG results showed findings suggestive of motor neuron damage. On the other hand, analysis using model mouse spinal cord slice cultures revealed that Mid1 increased the expression level of mutant androgen receptor, the protein responsible for the disease, and induced motor neuron degeneration.

Academic Significance and Societal Importance of the Research Achievements

女性保因者の解析からは、アンドロゲン受容体遺伝子変異を有していても男性ホルモンのレベルが高くない状態では軽微な運動ニューロン変性は生じるものの骨格筋変性は生じないと考えられ、この状況は思春期前の未発症男性に相当する可能性がある。マウス脊髄スライス培養の解析からは、Mid1が運動ニューロンに比較的特異的に発現していることがSBMAの細胞特異性に関連していると考えられ、その機序は男性ホルモン依存的なアンドロゲン受容体の翻訳の促進であると考えられる。以上から、Mid1を介した運動ニューロン変性はSBMAの早期予防治療の標的として重要と考えられる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Comments on the Screening Results   Annual Research Report
  • Research Products

    (11 results)

All 2022 2021 2020

All Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 4 results) Patent(Industrial Property Rights) (1 results) (of which Overseas: 1 results)

  • [Journal Article] Mid1 is associated with androgen-dependent axonal vulnerability of motor neurons in spinal and bulbar muscular atrophy2022

    • Author(s)
      Ogura Yosuke、Sahashi Kentaro、Hirunagi Tomoki、Iida Madoka、Miyata Takaki、Katsuno Masahisa
    • Journal Title

      Cell Death & Disease

      Volume: 13 Issue: 7 Pages: 601-601

    • DOI

      10.1038/s41419-022-05001-6

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Label-free morphological sub-population cytometry for sensitive phenotypic screening of heterogenous neural disease model cells2022

    • Author(s)
      Imai Yuta、Iida Madoka、Kanie Kei、Katsuno Masahisa、Kato Ryuji
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 9296-9296

    • DOI

      10.1038/s41598-022-12250-0

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nucleic Acid-Based Therapeutic Approach for Spinal and Bulbar Muscular Atrophy and Related Neurological Disorders2022

    • Author(s)
      Hirunagi T, Sahashi K, Meilleur KG, Katsuno M.
    • Journal Title

      Genes

      Volume: 13 Issue: 1 Pages: 109-109

    • DOI

      10.3390/genes13010109

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Actin-binding protein filamin-A drives tau aggregation and contributes to progressive supranuclear palsy pathology2022

    • Author(s)
      Tsujikawa K,Hamanaka K, Riku Y, Hattori Y, Hara N, Iguchi Y,Miyata T, Sobue G, Matsumoto N, Sahashi K, Katsuno M, et al.
    • Journal Title

      Sci Adv

      Volume: - Issue: 21 Pages: 1-16

    • DOI

      10.1126/sciadv.abm5029

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Selective suppression of polyglutamine-expanded protein by lipid nanoparticle-delivered siRNA targeting CAG expansions in the mouse CNS.2021

    • Author(s)
      Hirunagi T, Sahashi K, Tachikawa K, Leu AI, Nguyen M, Mukthavaram R, Karmali PP, Chivukula P, Tohnai G, Iida M, Onodera K, Ohyama M, Okada Y, Okano H, Katsuno M.
    • Journal Title

      Mol Ther Nucleic Acids.

      Volume: 24 Pages: 1-10

    • DOI

      10.1016/j.omtn.2021.02.007

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Next generation therapies for SBMA2022

    • Author(s)
      Katsuno M
    • Organizer
      第62回日本神経学会学術大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Presymptomatic exercise ameliorates polyglutamine-expanded protein accumulation and motor dysfunction in a mouse model of SBMA.2021

    • Author(s)
      Katsuno M.
    • Organizer
      16th meeting of Asian-Pacific Society for Neurochemistry
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Presymptomatic exercise attenuates motor dysfunction in a mouse model of SBMA.2020

    • Author(s)
      蛭薙 智紀, 中辻 秀朗, 佐橋 健太郎, 藤内 玄規, 飯田 円, 山田 晋一郎, 村上 あゆ香, 野田 成哉, 勝野 雅央
    • Organizer
      第61回日本神経学会学術大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ALSのマウスモデルの有用性と特性2020

    • Author(s)
      井口洋平
    • Organizer
      第61回日本神経学会学術大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Secretion and propagation of TDP-43 as a therapeutic target for ALS.2020

    • Author(s)
      Yohei Iguchi
    • Organizer
      第43回日本神経科学大会 (Neuro2020)
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Patent(Industrial Property Rights)] UNA OLIGOMERS FOR THE TREATMENT OF POLYGLUTAMINE DISEASES2020

    • Inventor(s)
      Hirunagi T, Sahashi K, et al
    • Industrial Property Rights Holder
      Hirunagi T, Sahashi K, et al
    • Industrial Property Rights Type
      特許
    • Filing Date
      2020
    • Related Report
      2020 Annual Research Report
    • Overseas

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Published: 2020-04-28   Modified: 2024-01-30  

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