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Elucidation of the mechanism of autism onset based on testis-brain linkage and development of novel therapies

Research Project

Project/Area Number 22K19599
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 56:Surgery related to the biological and sensory functions and related fields
Research InstitutionKanazawa University

Principal Investigator

Nishiyama Masaaki  金沢大学, 新学術創成研究機構, 教授 (50423562)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords精巣-脳連関 / 自閉症
Outline of Research at the Start

申請者らのグループは長年にわたりCHD8の研究を行っており、CHD8変異を再現したマウスが社会的行動の異常や不安様行動の増加といった自閉症に特徴的な行動異常を示すことを世界に先駆けて発見した。その後の研究によって、自閉症原因遺伝子であるCHD8は神経以外の多臓器で重要な役割を果たしていることが報告された。その中でも精巣特異的にCHD8を欠損させたマウスは不妊となり、さらに自閉症を模倣する行動異常を示すことが予備的実験で明らかになった。本研究において、精巣におけるCHD8の機能と神経活動との関わりを精巣-脳連関という形で明らかにする。

Outline of Final Research Achievements

We examined the function of CHD8 during spermatogenesis by establishing a germ-cell specific Chd8 loss-of-function mouse model. We observed that Chd8 ablation in germ cells leads to testicular atrophy and infertility. Upon closer inspection, CHD8-deficient germ cells exhibited two independent phenotypes: a gradual depletion of undifferentiated spermatogonia and acute differentiation arrest before the pachytene stage during meiotic prophase I. Transcriptional analyses demonstrated that CHD8 is required for extensive activation of spermatogenic genes in spermatogonia. We confirmed that CHD8 is associated with the activation of genes required for meiosis, namely H3K4me3 histone methyltransferase genes, meiotic cohesin genes, HORMA domain-containing genes, synaptonemal complex genes, and DNA damage response (DDR) genes.

Academic Significance and Societal Importance of the Research Achievements

クロマチンリモデラーであるCHD8は、自閉スペクトラム症(ASD)で頻繁に変異が見つかることから、主に自閉症原因遺伝子として知られている。一方、CHD8は、造血幹細胞、脂肪細胞、腸管細胞など、様々な非神経臓器の発生に必須な役割を果たすことが報告されている。本研究では、精子形成におけるCHD8の機能を明らかにしようとした。その理由のひとつは、自閉症を含む知的障害と生殖能力の低下との間に疫学的関連があることである。われわれの結果は、減数第一分裂前期の正常な進行のために、ヒストンメチルトランスフェラーゼを制御するCHD8の重要な機能を明らかにするものである。

Report

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

    (11 results)

All 2024 2023 2022 Other

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (4 results) (of which Invited: 4 results) Book (1 results) Remarks (1 results)

  • [Journal Article] The complex etiology of autism spectrum disorder due to missense mutations of CHD82024

    • Author(s)
      Shiraishi Taichi、Katayama Yuta、Nishiyama Masaaki、Shoji Hirotaka、Miyakawa Tsuyoshi、Mizoo Taisuke、Matsumoto Akinobu、Hijikata Atsushi、Shirai Tsuyoshi、Mayanagi Kouta、Nakayama Keiichi I.
    • Journal Title

      Molecular Psychiatry

      Volume: - Issue: 7 Pages: 2145-2160

    • DOI

      10.1038/s41380-024-02491-y

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Chromatin remodeler CHD8 is required for spermatogonial proliferation and early meiotic progression2024

    • Author(s)
      Nitahara Kenta、Kawamura Atsuki、Kitamura Yuka、Kato Kiyoko、Namekawa Satoshi H、Nishiyama Masaaki
    • Journal Title

      Nucleic Acids Research

      Volume: 52 Issue: 6 Pages: 2995-3010

    • DOI

      10.1093/nar/gkad1256

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Classification of multiple emotional states from facial expressions in head-fixed mice using a deep learning-based image analysis2023

    • Author(s)
      Tanaka Y, Nakata T, Hibino H, Nishiyama M, Ino D
    • Journal Title

      PLoS ONE

      Volume: 18 Issue: 7 Pages: e0288930-e0288930

    • DOI

      10.1371/journal.pone.0288930

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Deletion of the autism-related gene Chd8 alters activity-dependent transcriptional responses in mouse postmitotic neurons2023

    • Author(s)
      Kawamura Atsuki、Nishiyama Masaaki
    • Journal Title

      Communications Biology

      Volume: 6 Issue: 1 Pages: 593-593

    • DOI

      10.1038/s42003-023-04968-y

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A fluorescent sensor for real-time measurement of extracellular oxytocin dynamics in the brain2022

    • Author(s)
      Daisuke Ino, Yudai Tanaka, Hiroshi Hibino, and Masaaki Nishiyama
    • Journal Title

      Nature Methods

      Volume: 19 Issue: 10 Pages: 1286-1294

    • DOI

      10.1038/s41592-022-01597-x

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] ヒト型モデル動物を用いた自閉症の神経回路の同定と治療法開発への応用2024

    • Author(s)
      西山 正章
    • Organizer
      第17回自閉症学研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Identification of neural circuitry in autism spectrum disorder using human-animal models2023

    • Author(s)
      Masaaki Nishiyama
    • Organizer
      第64回日本神経病理学会総会学術研究会/第66回日本神経化学会大会 合同大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 自閉症の発症メカニズムの解明と創薬開発への応用 自閉症は大人になっても治せるか?2022

    • Author(s)
      西山正章
    • Organizer
      第7回連合大学院小児発達学研究科セミナー
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] ヒト型モデル動物を用いた自閉症の神経回路の同定と治療法開発への応用2022

    • Author(s)
      西山正章
    • Organizer
      浜松医科大学研究戦略セミナー
    • Related Report
      2022 Research-status Report
    • Invited
  • [Book] 論文図表を読む作法2022

    • Author(s)
      西山正章
    • Total Pages
      288
    • Publisher
      羊土社
    • ISBN
      9784758122603
    • Related Report
      2022 Research-status Report
  • [Remarks] 金沢大学医薬保健研究域医学系 組織細胞学

    • URL

      http://ana1.w3.kanazawa-u.ac.jp/

    • Related Report
      2023 Annual Research Report 2022 Research-status Report

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Published: 2022-07-05   Modified: 2025-01-30  

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