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Studies on circuit-mechanisms of cerebellar hypolpasia by mosaic distribution of CASK deficient neurons.

Research Project

Project/Area Number 21K07293
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 InstitutionShinshu University

Principal Investigator

Mori Takuma  信州大学, 学術研究院医学系, 助教 (70545798)

Project Period (FY) 2021-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsX染色体不活性化 / CASK異常症 / 小脳低形成 / MICPCH症候群 / 深層学習 / マウス行動解析 / CASK / SIK1 / 小脳
Outline of Research at the Start

CASKヘテロ欠損メスマウスを用いて、X染色体不活性化によるモザイク状のCASK欠損が、小脳神経細胞の生存および小脳神経回路形成に及ぼす影響を電気生理学的・解剖学的に解析する。X染色体にGFPやRFP遺伝子をもつHPRT-GFP/RFPマウスとCASKヘテロ欠損メスマウスを組み合わせることで、CASK遺伝子のX染色体不活性化状態を網羅的に可視化しunbiasedに解析する。

Outline of Final Research Achievements

As a model for female patients with CASK abnormalities, we analyzed brain tissue from heterozygous Cask knockout female mice. To visualize X chromosome inactivation, we combined HPRT1-GFP knock-in mice, successfully visualizing the cellular mosaic distribution pattern within the brain.Heterozygous Cask knockout female mice exhibited a significant reduction in cerebellar size and impaired motor functions such as motor learning, which are associated with cerebellar function. The visualization of Cask-non-expressing granule cells in mice aged 1 to 2 weeks suggested that the reduction in cerebellar size may be attributed to cerebellar granule cell death occurring during this period.

Academic Significance and Societal Importance of the Research Achievements

これまでX連鎖性発達性疾患の研究は、男性/オスを対象として研究が発展してきた。これは、女性特有のX染色体不活性化という生物現象が、複雑な組織構造を形成するため、その解析が困難だったという理由が大きい。本研究では、蛍光タンパク質による細胞の可視化を利用することで、この技術的な困難を克服し、脳組織構造を遺伝子情報も組み込んだ形で解析することが可能になった。
この研究は、CASK異常症という希少疾患の発症メカニズムの理解や治療戦略の策定に役立つことは疑いない。加えて、本研究手法は、他のX連鎖性発達性疾患の研究にも応用可能であり、その波及効果は大きく社会的に意義ある成果に繋がったと言える。

Report

(5 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (14 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (4 results) Journal Article (8 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 8 results,  Open Access: 8 results) Presentation (1 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] Massachusetts General Hospital/Harvard Medical School(米国)

    • Related Report
      2023 Research-status Report
  • [Int'l Joint Research] TU Dresden(ドイツ)

    • Related Report
      2023 Research-status Report
  • [Int'l Joint Research] University of Strathclyde(英国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] DGIST(韓国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Reductions of Parvalbumin Positive Interneurons and Adult Hippocampal Neurogenesis were Observed in the Genetically Mimicked Mouse Models for <i>IQSEC2</i>-related Disorders2024

    • Author(s)
      Mengyun ZHOU, Qi GUO, Emi KOUYAMA-SUZUKI, Katsuhiko TABUCHI, Takuma MORI
    • Journal Title

      THE SHINSHU MEDICAL JOURNAL

      Volume: 72 Issue: 6 Pages: 385-396

    • DOI

      10.11441/shinshumedj.72.385

    • ISSN
      0037-3826, 1884-6580
    • Year and Date
      2024-12-10
    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Adult neurogenesis in the ventral hippocampus decreased among animal models of neurodevelopmental disorders2024

    • Author(s)
      Sun Lihao、Ohashi Nobuhiko、Mori Takuma、Mizuno Yuka、Zang Weichen、Guo Qi、Kouyama-Suzuki Emi、Shirai Yoshinori、Tabuchi Katsuhiko
    • Journal Title

      Frontiers in Neural Circuits

      Volume: 18

    • DOI

      10.3389/fncir.2024.1504191

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Deep-Learning-Based Analysis Reveals a Social Behavior Deficit in Mice Exposed Prenatally to Nicotine2024

    • Author(s)
      Zhou Mengyun、Qiu Wen、Ohashi Nobuhiko、Sun Lihao、Wronski Marie-Louis、Kouyama-Suzuki Emi、Shirai Yoshinori、Yanagawa Toru、Mori Takuma、Tabuchi Katsuhiko
    • Journal Title

      Cells

      Volume: 13 Issue: 3 Pages: 275-275

    • DOI

      10.3390/cells13030275

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Diverse Clinical Phenotypes of CASK-Related Disorders and Multiple Functional Domains of CASK Protein2023

    • Author(s)
      Mori Takuma、Zhou Mengyun、Tabuchi Katsuhiko
    • Journal Title

      Genes

      Volume: 14 Issue: 8 Pages: 1656-1656

    • DOI

      10.3390/genes14081656

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] An Epilepsy-Associated Mutation of Salt-Inducible Kinase 1 Increases the Susceptibility to Epileptic Seizures and Interferes with Adrenocorticotropic Hormone Therapy for Infantile Spasms in Mice2022

    • Author(s)
      Pang Bo、Mori Takuma、Badawi Moataz、Zhou Mengyun、Guo Qi、Suzuki-Kouyama Emi、Yanagawa Toru、Shirai Yoshinori、Tabuchi Katsuhiko
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 23 Issue: 14 Pages: 7927-7927

    • DOI

      10.3390/ijms23147927

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Risperidone Mitigates Enhanced Excitatory Neuronal Function and Repetitive Behavior Caused by an ASD-Associated Mutation of SIK12021

    • Author(s)
      Badawi Moataz、Mori Takuma、Kurihara Taiga、Yoshizawa Takahiro、Nohara Katsuhiro、Kouyama-Suzuki Emi、Yanagawa Toru、Shirai Yoshinori、Tabuchi Katsuhiko
    • Journal Title

      Frontiers in Molecular Neuroscience

      Volume: 14 Pages: 706494-706494

    • DOI

      10.3389/fnmol.2021.706494

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Npas4 regulates IQSEC3 expression in hippocampal somatostatin interneurons to mediate anxiety-like behavior2021

    • Author(s)
      Kim Seungjoon、Park Dongseok、Kim Jinhu、Kim Dongwook、Kim Hyeonho、Mori Takuma、Jung Hyeji、Lee Dongsu、Hong Sookyung、Jeon Jongcheol、Tabuchi Katsuhiko、Cheong Eunji、Kim Jaehoon、Um Ji Won、Ko Jaewon
    • Journal Title

      Cell Reports

      Volume: 36 Issue: 3 Pages: 109417-109417

    • DOI

      10.1016/j.celrep.2021.109417

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] IQSEC2 Deficiency Results in Abnormal Social Behaviors Relevant to Autism by Affecting Functions of Neural Circuits in the Medial Prefrontal Cortex2021

    • Author(s)
      Mehta Anuradha、Shirai Yoshinori、Kouyama-Suzuki Emi、Zhou Mengyun、Yoshizawa Takahiro、Yanagawa Toru、Mori Takuma、Tabuchi Katsuhiko
    • Journal Title

      Cells

      Volume: 10 Issue: 10 Pages: 2724-2724

    • DOI

      10.3390/cells10102724

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Region- and cell-type-specific cell-autonomous cell loss by X chromosome inactivation in CASK heterozygote knockout female.2024

    • Author(s)
      Takuma Mori, Mengyun Zhou, Taichi Akatsuka, Ken Kunugitani, Yukina Yoshida, Qi Guo, Shin Kobayashi, and Katsuhiko Tabuchi
    • Organizer
      第47回日本神経科学学会
    • Related Report
      2024 Annual Research Report
  • [Patent(Industrial Property Rights)] MICPCH症候群治療剤及び治療方法2023

    • Inventor(s)
      田渕 克彦、白井 良憲、森 琢磨、鈴木 絵美
    • Industrial Property Rights Holder
      田渕 克彦、白井 良憲、森 琢磨、鈴木 絵美
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-125771
    • Filing Date
      2023
    • Related Report
      2023 Research-status Report

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Published: 2021-04-28   Modified: 2026-01-16  

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