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Changes in molecular structure due to polymorphism-dependent gene expression in early-onset schizophrenia

Research Project

Project/Area Number 17K10267
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Psychiatric science
Research InstitutionInternational University of Health and Welfare (2019-2020)
Tokyo Medical and Dental University (2017-2018)

Principal Investigator

Uezato Akihito  国際医療福祉大学, 医療福祉学部, 教授 (90547449)

Co-Investigator(Kenkyū-buntansha) 海野 真一  昭和大学, 医学部, ポストドクター (00735855)
Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords統合失調症 / 双極性障害 / 遺伝に関連解析 / 死後脳 / グルタミン酸 / リチウム / 遺伝子関連解析 / 臨床精神分子遺伝学 / 遺伝子発現 / 早期発症
Outline of Final Research Achievements

In this study based on the glutamate hypothesis, we investigated involvement of schizophrenia sensitive genes in the disease by genetic association studies and postmortem studies.
The genetic association study using about 4,000 case-control cohort revealed that the novel variant of DLG1 gene, which codes the scaffolding protein of NMDA-type glutamate receptor, was genetically associated with schizophrenia. Furthermore, the association was dependent on the age of onset.
SLC35B2, which is involved in the transport of D-serine, a co-agonist of NMDA receptor, was genetically associated with both schizophrenia and bipolar disorder. Furthermore, SLC35B2 mRNA was reduced in the postmortem brains of patients with bipolar disorder in a lithium treatment-dependent manner.

Academic Significance and Societal Importance of the Research Achievements

統合失調症や双極性障害は患者のQOLに大きな影響を与える精神疾患であるが、その病態は十分に解明されていない。また現在までに様々な薬剤が開発されているが、十分に良好な予後を保証しているとは言い難い。本研究はこれらの精神疾患の更なる病態解明や、新規治療薬の開発の道を拓く可能性がある。すなわち既存の抗精神病薬はドパミン仮説に基づいたドパミン受容体遮断作用を基礎とするが、グルタミン酸仮説に基づく本研究成果は、グルタミン酸受容体遮断薬の開発に道筋をつけることができる。また双極性障害の治療薬であるリチウムはその作用機序が未解明であるが、本研究で得られた成果は疾患の病態・治療の両方の機序解明に示唆を与える。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (6 results)

All 2019 2018 2017

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (3 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] 統合失調症とグルタミン酸2018

    • Author(s)
      上里彰仁、西川徹
    • Journal Title

      精神科

      Volume: 32 Pages: 222-226

    • Related Report
      2017 Research-status Report
  • [Journal Article] Genetic and molecular risk factors within the newly identified primate-specific exon of the SAP97/DLG1 gene in the 3q29 schizophrenia-associated locus.2017

    • Author(s)
      Akihito Uezato, Naoki Yamamoto, Daisuke Jitoku, Emiko Haramo, Eri Hiraaki, Yoshimi Iwayama, Tomoko Toyota, Masakazu Umino, Asami Umino, Yasuhide Iwata, Katsuaki Suzuki, Mitsuru Kikuchi, Tasuku Hashimoto, Nobuhisa Kanahara, Akeo Kurumaji, Takeo Yoshikawa, Toru Nishikawa.
    • Journal Title

      American Journal of Medical Genetics(Part B): Neuropsychiatric_Genetics,

      Volume: 174 Issue: 8 Pages: 798-804

    • DOI

      10.1002/ajmg.b.32595

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 〔特集〕「統合失調症」再考(Ⅱ):死後脳研究は統合失調症の理解に何をもたらしたか?2017

    • Author(s)
      上里彰仁
    • Journal Title

      精神医学

      Volume: 59 Pages: 1107-1114

    • Related Report
      2017 Research-status Report
  • [Presentation] Molecular Pathology and Therapeutic Potentials in Schizophrenia - Glutamatergic system in schizophrenia and future perspective for the treatment.2019

    • Author(s)
      UEZATO Akihito
    • Organizer
      6th Asian College of Neuropsychopharmacology (AsCNP) Congress
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Molecular and genetic study of the discs, large homolog 1 of Drosophila (DLG1) in schizophrenia2018

    • Author(s)
      A. UEZATO, N. YAMAMOTO, D. JITOKU, E. HARAMO, E. HIRAAKI, Y. IWAYAMA, M. UMINO, A. UMINO, A. KURUMAJI, T. YOSHIKAWA, T. NISHIKAWA
    • Organizer
      CINP 31st World Congress 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 統合失調症におけるDLG1(SAP97)の分子遺伝学的研究2017

    • Author(s)
      上里彰仁
    • Organizer
      日本生物学的精神医学会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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