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Research on dementia therapeutics targeting tau splicing

Research Project

Project/Area Number 20K07968
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52030:Psychiatry-related
Research InstitutionKyoto University

Principal Investigator

Keiko Imamura  京都大学, iPS細胞研究所, 特定拠点講師 (90379652)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsタウ / スプライシング / iPS細胞 / 脳オルガノイド / アンチセンスオリゴ / 前頭側頭葉変性症 / tauopathy / splicing / ASO
Outline of Research at the Start

高齢化を背景に、認知症治療法の確立が急務である。認知症の大多数を占めるアルツハイマー病や前頭側頭葉変性症では、臨床症状がタウ蛋白の異常蓄積や神経細胞死とともに出現してくることが知られており、タウ蛋白は治療介入のために重要なターゲットである。タウ蛋白はスプライシング様式によって3リピートタウと4リピートタウに分類され、4リピートタウはβシート化を促進し、神経毒性が高いタウオリゴマーの形成を促進する。化合物等を用いて、認知症患者神経細胞におけるタウのスプライシング制御を行い、タウオリゴマーの減少と神経細胞死抑制を可能にする認知症治療候補薬を探索する。

Outline of Final Research Achievements

The increase in the number of patients with dementia due to the aging of the population has become a growing problem, and there is an urgent need to establish a fundamental treatment for dementia. In Alzheimer's disease and frontotemporal lobar degeneration, which account for the majority of dementia cases, tau protein is an important target for therapeutic intervention because clinical symptoms of dementia are known to emerge with abnormal accumulation of tau protein and neuronal cell death. Tau proteins are classified by splicing mode into 3-repeat tau and 4-repeat tau, with 4-repeat tau promoting β-sheeting and the formation of highly neurotoxic tau oligomers. We have identified candidate drugs for the treatment of dementia that regulate tau expression and splicing in neurons from patients with dementia, and that can reduce tau oligomers and inhibit neuronal cell death.

Academic Significance and Societal Importance of the Research Achievements

認知症の臨床症状は、異常タウタンパク質の蓄積や神経細胞死とともに、出現してくることが知られている。そのため、医療現場における現実的な治療的介入のためには、異常タウタンパク質の蓄積や神経細胞死が治療ターゲットとして重要と考えられる。異常タウタンパク質の蓄積は、認知症を来す多くの神経変性疾患で見られ、これに治療的介入が可能となれば、社会医学的に大きなメリットを有する。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2021 2020

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results)

  • [Journal Article] Induction of inverted morphology in brain organoids by vertical-mixing bioreactors2021

    • Author(s)
      Suong D, Imamura K, Inoue I, Kabai R, Sakamoto S, Okumura T, Kato Y, Kondo T, Yada Y, Klein WL, Watanabe A, Inoue H
    • Journal Title

      Communications Biology

      Volume: 4 Issue: 1 Pages: 1213-1213

    • DOI

      10.1038/s42003-021-02719-5

    • NAID

      120007166023

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] AIとiPS細胞を用いた創薬・疾患研究2023

    • Author(s)
      今村恵子、井上治久
    • Organizer
      第22回日本再生医療学会総会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Development of diagnostic models for neurological diseases using stem cells and Deep Neural Network ~ Deep Learning with iPSC-based scanning (Deep iScan) ~2022

    • Author(s)
      Keiko Imamura1, Yuichiro Yada, Ayako Nagahashi, Haruhisa Inoue
    • Organizer
      Cell Symposium: Advances in Therapeutic Applications of Stem Cells
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Nasal vaccination against tauopathy using Sendai virus vector2021

    • Author(s)
      Keiko Imamura, Hiroki Takeuchi, Naruhiko Sahara, Hideo Hara, Takeshi Tabira, Tetsuya Suhara, Ryosuke Takahashi, Makoto Higuchi, Haruhisa Inoue
    • Organizer
      第44回神経科学大会
    • Related Report
      2021 Research-status Report
  • [Presentation] タウオパチーに対する免疫療法2021

    • Author(s)
      今村恵子、井上治久
    • Organizer
      第36回日本老年精神医学会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] タウオパチー治療のための点鼻ワクチンの開発2020

    • Author(s)
      今村恵子
    • Organizer
      第63回 日本神経化学会大会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 認知症に対するタウ点鼻ワクチンの開発2020

    • Author(s)
      今村恵子
    • Organizer
      第39回日本認知症学会学術集会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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