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Exploration of mechanism for schizophrenia origin and longitudinal consequence

Research Project

Project/Area Number 17H01574
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Psychiatric science
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Yoshikawa Takeo  国立研究開発法人理化学研究所, 脳神経科学研究センター, チームリーダー (30249958)

Co-Investigator(Kenkyū-buntansha) 木村 英雄  山陽小野田市立山口東京理科大学, 薬学部, 教授 (30321889)
大西 哲生  国立研究開発法人理化学研究所, 脳神経科学研究センター, 副チームリーダー (80373281)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥42,900,000 (Direct Cost: ¥33,000,000、Indirect Cost: ¥9,900,000)
Fiscal Year 2019: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
Fiscal Year 2018: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
Fiscal Year 2017: ¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Keywords統合失調症 / 硫化水素 / エネルギー代謝 / エピジェネティックス / 炎症 / 酸化ストレス / 還元ストレス / 死後脳 / イオウ / 遺伝子改変マウス / 炎症ストレス / DNAメチル化 / poly I:C / iPS細胞
Outline of Final Research Achievements

We previously revealed that elevated levels of Mpst, a hydrogen sulfide (H2S)/polysulfides-producing enzyme, led to impaired prepulse inhibition with increased sulfide deposition. Analysis of human samples demonstrated that the H2S/polysulfides production system is indeed upregulated in schizophrenia. Mechanistically, Mpst overexpression dampened energy metabolism, while maternal immune activation model mice showed upregulation of genes for H2S/polysulfides production, via epigenetic modifications. These results suggest that inflammatory/oxidative insults in early brain development result in upregulated H2S/polysulfides production as an antioxidative response, which in turn cause deficits in bioenergetic processes. This study revealed that an elevated H2S/polysulfides-producing system(“sulfide stress”)underlies the pathophysiology of a subset of schizophrenia, explaining a novel aspect of the “neurodevelopmental hypothesis”, and could provide a novel paradigm for drug development.

Academic Significance and Societal Importance of the Research Achievements

統合失調症のこれまで知られていなかった病理・病態として、硫化水素の産生系が亢進していることを発見した。硫化水素の産生系が亢進する原因は、脳の発達期に受けた炎症・酸化ストレスに起因し、硫化水素の産生系亢進は脳のエネルギー代謝を低下させることが判明した。過硫化ストレスという概念は、統合失調症の成因から転帰までを統一的に説明することができ、かつ創薬の新しい切り口になることが期待される。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (2 results)

All 2020 2019

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

  • [Journal Article] Excess hydrogen sulfide and polysulfides production underlies a schizophrenia pathophysiology.2019

    • Author(s)
      Ide M, et al. .... Kimura H, Yoshikawa T.
    • Journal Title

      EMBO Mol Med.

      Volume: 11(12) Issue: 12

    • DOI

      10.15252/emmm.201910695

    • NAID

      120007132855

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] マウスの系統差から探る統合失調症病理 - Genetics vs. Epigenetics -2020

    • Author(s)
      吉川武男
    • Organizer
      第255回つくばブレインサイエンス・セミナー
    • Related Report
      2019 Annual Research Report
    • Invited

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Published: 2017-04-28   Modified: 2021-02-19  

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