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Comprehensive association study between Complement C4 and schizophrenia

Research Project

Project/Area Number 21H02854
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 52030:Psychiatry-related
Research InstitutionNagoya University (2023)
Fujita Health University (2021-2022)

Principal Investigator

Ikeda Masashi  名古屋大学, 医学系研究科, 教授 (60424933)

Co-Investigator(Kenkyū-buntansha) 國井 泰人  東北大学, 災害科学国際研究所, 准教授 (00511651)
寺尾 知可史  国立研究開発法人理化学研究所, 生命医科学研究センター, チームリーダー (60610459)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2022: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2021: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Keywords統合失調症 / C4 / 補体 / 遺伝子多型 / 双極性障害
Outline of Research at the Start

統合失調症の全ゲノム関連解析(GWAS)およびその追加解析から同定された補体第4成分(C4)との関連は、タイピングが困難であり、現状では白人以外の解析は容易ではない。そのため、本研究では、日本人のC4の遺伝子多型の参照配列を整備し、日本人統合失調症との関連を検討することを第一の目標とする。また、死後脳や血漿でのC4蛋白との関連も検討することで、統合失調症におけるC4の関連性に決着をつける。

Outline of Final Research Achievements

Genome-Wide Association Studies (GWAS) of schizophrenia have highlighted the Major Histocompatibility Complex (MHC) region as candidate region, with complement component 4 (C4) being identified as a potential susceptibility gene. In this study, we utilized Japanese schizophrenia GWAS data to perform C4 imputation and examined the associations. Our findings revealed that, in contrast to previously reported data from Caucasian populations, a different haplotype was associated with schizophrenia. These results suggest the possibility of ethnic differences and indicate that further research could lead to a more precise identification of susceptibility genes

Academic Significance and Societal Importance of the Research Achievements

MHC領域と精神疾患の関連は、民族によって異なっている。例えば白人では統合失調症が最も有意である一方、日本人をはじめとした東アジアサンプルでは統合失調症よりも双極性障害で関連性が強いと考えられている。したがって、統合失調症ー双極性障害という疾患の違い、遺伝的民族差を考え合わせると、それぞれの文化での診断傾向などを同定できる可能性があり、臨床精神医学的にも進展が望まれる。

Report

(3 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (11 results)

All 2023 2022 2021

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (6 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Differential genetic correlations across major psychiatric disorders between Eastern and Western countries2023

    • Author(s)
      Saito Takeo、Ikeda Masashi、Terao Chikashi、Ashizawa Takuma、Miyata Masami、Tanaka Satoshi、Kanazawa Tetsufumi、Kato Tadafumi、Kishi Taro、Iwata Nakao
    • Journal Title

      Psychiatry and Clinical Neurosciences

      Volume: 77 Issue: 2 Pages: 118-119

    • DOI

      10.1111/pcn.13498

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Proportion of subjects with psychotic features in bipolar disorder correlated with treatment response by antipsychotics for acute mania2022

    • Author(s)
      Ikeda Masashi、Saito Takeo、Kanazawa Tetsufumi、Kishi Taro、Iwata Nakao
    • Journal Title

      Psychiatry and Clinical Neurosciences

      Volume: 76 Issue: 11 Pages: 596-598

    • DOI

      10.1111/pcn.13460

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Shared genetic components between metabolic syndrome and schizophrenia: Genetic correlation using multi‐population datasets2022

    • Author(s)
      Aoki Rei、Saito Takeo、Ninomiya Kohei、Shimasaki Ayu、Ashizawa Takuma、Ito Kenta、Ikeda Masashi、Iwata Nakao
    • Journal Title

      Psychiatry and Clinical Neurosciences

      Volume: - Issue: 8 Pages: 361-366

    • DOI

      10.1111/pcn.13372

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cost effectiveness of pharmacogenetic-guided clozapine administration based on risk of HLA variants in Japan and the UK2021

    • Author(s)
      Ninomiya Kohei、Saito Takeo、Okochi Tomo、Taniguchi Satoru、Shimasaki Ayu、Aoki Rei、Hata Takeo、Mushiroda Taisei、Kanazawa Tetsufumi、Ikeda Masashi、Iwata Nakao
    • Journal Title

      Translational Psychiatry

      Volume: 11 Issue: 1 Pages: 362-362

    • DOI

      10.1038/s41398-021-01487-4

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Omega‐3 fatty acids for treating residual depressive symptoms in adult patients with bipolar disorder: A systematic review and meta‐analysis of double‐blind randomized, placebo‐controlled trials2021

    • Author(s)
      Kishi Taro、Sakuma Kenji、Okuya Makoto、Ikeda Masashi、Iwata Nakao
    • Journal Title

      Bipolar Disorders

      Volume: 23 Issue: 7 Pages: 730-731

    • DOI

      10.1111/bdi.13115

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] 精神疾患のゲノム研究2023

    • Author(s)
      池田匡志
    • Organizer
      東海精神神経学会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Can Genomic medicine help clinical psychiatry?2022

    • Author(s)
      池田匡志
    • Organizer
      Neuro2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 精神疾患のゲノム研究2022

    • Author(s)
      池田匡志
    • Organizer
      bpcnpnppp2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] ポリジェニックモデルから考える精神疾患の診断2022

    • Author(s)
      池田匡志
    • Organizer
      bpcnpnppp2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] 精神疾患の「ポリジェニック構造」を基盤とした新たな方法論とその臨床応用2021

    • Author(s)
      池田匡志
    • Organizer
      第117回日本精神神経学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] より良い精神科臨床薬理研究を行うために~ゲノム研究の立場から2021

    • Author(s)
      池田匡志
    • Organizer
      第31回日本臨床精神神経薬理学会
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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