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Understanding the pathophysiology of autism spectrum disorder through inhibitory neural circuits and exploring new treatment strategies

Research Project

Project/Area Number 22K15638
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionNagoya University

Principal Investigator

Horigane Shin-ichiro  名古屋大学, 環境医学研究所, 講師 (60775906)

Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords神経発達障害 / 神経回路病態 / Timothy症候群 / カルシウムシグナリング / 病態モデルマウス / L型カルシウムチャネル / 自閉スペクトラム症 / 神経回路形成 / カルシウムシグナリング破綻
Outline of Research at the Start

自閉スペクトラム症(ASD)は、社会性の障害や固執的な反復行動を主な特徴とし、胎生・発達期にかけての「神経回路の形成障害」が、発症要因として注目を集める。しかしその一方で、こうした回路形成障害の実態やASDとの因果関係については多くが未解明であり、病態理解を基礎とした合理的な治療法の開発が困難な状況にある。
我々はこれまでに、ASD患者から同定された、変異型のL型カルシウムチャネルを発現するマウス系統を作出し、同マウスにおけるASD様行動と抑制性神経回路の形成障害を見出した。本研究では、こうした抑制性回路の形成障害とASD様行動との因果関係を明らかにし、破綻した抑制性回路を標的とした実験的治療を行う。

Outline of Final Research Achievements

This study aimed to elucidate the neurocircuitry pathophysiology underlying Autism Spectrum Disorder (ASD) and develop effective treatments based on the understanding of its pathogenesis. The research findings revealed that when mutant L-type calcium channels, identified in ASD patients, were expressed in both excitatory and inhibitory neurons of mice, ASD-like behavioral abnormalities were observed. However, when the mutant channels were expressed in either excitatory or inhibitory neurons alone, ASD-like behavioral abnormalities were not detected. This suggests that the expression of the mutant channels in both excitatory and inhibitory neurons contributes to the ASD-like behavioral abnormalities. Furthermore, in mice exhibiting ASD-like behaviors, knocking out the mutant channels led to partial recovery of the ASD-like behaviors.

Academic Significance and Societal Importance of the Research Achievements

本研究により、自閉スペクトラム症(ASD)の背景にある新たな細胞分子メカニズムが明らかとなった。得られた研究成果は、いまだに不明点の多いASD病態の解明に向けた重要な知見を提供するものである。またさらに、病態モデルマウスに対する実験的介入により、一部のASD様行動が回復することも見出している。これはASD様行動異常の原因となる変異型のL型カルシウムチャネルをノックアウトすることで実現したものである。こうした知見は、ASDの中核症状である一部の行動異常について治療の可能性を示すものであり、今後のASD治療開発を推進する基盤となることが期待できる。

Report

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

    (14 results)

All 2025 2024 2023 2022

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (12 results) (of which Int'l Joint Research: 6 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] A hyper-activatable CAMK2A variant associated with intellectual disability causes exaggerated long-term potentiation and learning impairments2025

    • Author(s)
      Pan M, Liu P, Ozawa Y, Arima-Yoshida F, Dong G, Sawahata M, Mori D, Nagase M, Fujii H, Ueda S, Yabuuchi Y, Liu X, Narita H, Konno A, Hirai H, Ozaki N, Yamada K, Kidokoro H, Bito H, Mizoguchi H, M. Watabe A, Horigane S, Takemoto-Kimura S
    • Journal Title

      Translational Psychiatry

      Volume: 15 Issue: 1 Pages: 95-95

    • DOI

      10.1038/s41398-025-03316-4

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Polarized Ca2+ signalling drives neuronal nuclear deformation cycles underlying morphogenetic shape shift during cortical radial migration2024

    • Author(s)
      Horigane S, Takemoto-Kimura S, Kamijo S, Fujii H, Bito H
    • Organizer
      第74回脳の医学・生物学研究会& 第3回日本神経化学会若手KYOUEN合同大会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] A novel mouse model for de novo mutation in CAMK2A identified in patients with intellectual disability2024

    • Author(s)
      Pan M, Liu PW, Ozawa Y, Arima-Yoshida F, Dong G, Sawahata M, Mori D, Fujii H, Ueda S, Narita H, Konno A, Hirai H, Ozaki N, Yamada K, Kidokoro H, Bito H, Mizoguchi H, Watabe AM, Horigane S, Takemoto-Kimura S
    • Organizer
      NEURO2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-efficiency and brain-selective Cre-Lox recombination by AAV-PHP.eB-mediated gene transfer2024

    • Author(s)
      Kondo Y, Ozawa Y, Liu X, Pan M, Yabuuchi Y, Horigane S, Ueda S, Konno A, Hirai H, Takemoto-Kimura S
    • Organizer
      NEURO2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Polarized Ca2+ signalling drives neuronal nuclear deformation cycles underlying morphogenetic shape shift during cortical radial migration2024

    • Author(s)
      Horigane S, Takemoto-Kimura S, Kamijo S, Fujii H, Bito H
    • Organizer
      NEURO2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Polarized Ca2+ signalling drives neuronal nuclear deformation cycles underlying morphogenetic shape shift during cortical radial migration2024

    • Author(s)
      Horigane S, Takemoto-Kimura S, Kamijo S, Fujii H, Bito H
    • Organizer
      Society for Neuroscience (SFN)
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Developing multiplex imaging for deciphering Ca2+-dependent biochemical signaling in physiological and pathological neuronal systems2023

    • Author(s)
      Fujii H, Kidokoro H, Kondo Y, Kawaguchi M, Horigane S, Natsume J, Takemoto-Kimura S, Bito H
    • Organizer
      SfN Annual Meeting 2023
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] A nervous system-specific mouse model of Timothy syndrome shows autism spectrum disorder-like behavior2023

    • Author(s)
      Xinzi L, Horigane S, Ozawa Y, Pan M, Ueda S, Abe M, Sakimura K, Takemoto-Kimura S
    • Organizer
      The 7th Annual Meeting of the Global Alliance of Medical Excellence
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of a novel mouse model of intellectual disability2023

    • Author(s)
      Ozawa Y, Miao M, Horigane S, Takemoto-Kimura S
    • Organizer
      The 112th annual meeting of the Japanese society of pathology
    • Related Report
      2023 Research-status Report
  • [Presentation] Developing multiplex imaging for deciphering Ca2+-dependent biochemical signaling in physiological and pathological neuronal systems2023

    • Author(s)
      Fujii H, Kidokoro H, Kondo Y, Kawaguchi M, Horigane S, Natsume J, Takemoto-Kimura S, Bito H
    • Organizer
      The 46th Annual Meeting of the Japan Neuroscience Society
    • Related Report
      2023 Research-status Report
  • [Presentation] Phenotypic characterization of a novel mouse model for Timothy syndrome by a behavioral assessment battery2022

    • Author(s)
      Pan M, Ozawa Y, Ueda S, Abe M, Sakimura K, Horigane S, Takemoto-Kimura S
    • Organizer
      NEURO2022
    • Related Report
      2022 Research-status Report
  • [Presentation] Development of a nervous system-specific conditional knock-in mouse strain of a gain-of-function mutation in L-type Ca2+ channel associated with Timothy syndrome2022

    • Author(s)
      Ozawa Y, Pan M, Abe M, Sakimura K, Horigane S, Takemoto-Kimura S
    • Organizer
      NEURO2022
    • Related Report
      2022 Research-status Report
  • [Presentation] Calcium transients control a morphogenetic cycle underlying neuronal migratory movement2022

    • Author(s)
      Horigane S, Takemoto-Kimura S, Kamijo S, Adachi-Morishima A, Fujii H, Bito H
    • Organizer
      NEURO2022
    • Related Report
      2022 Research-status Report
  • [Book] Methods in Molecular Biology2024

    • Author(s)
      Horigane S, Takemoto-Kimura S
    • Total Pages
      355
    • Publisher
      Springer Nature
    • ISBN
      9781071638095
    • Related Report
      2024 Annual Research Report

URL: 

Published: 2022-04-19   Modified: 2026-01-16  

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