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Effects of Benzoic Acid on Treatment-Resistant Schizophrenia and Changes in Glutamate and Glutathione

Research Project

Project/Area Number 19K17097
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52030:Psychiatry-related
Research InstitutionUniversity of Yamanashi

Principal Investigator

Iwata Yusuke  山梨大学, 大学院総合研究部, 准教授 (00594772)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords統合失調症 / グルタミン酸 / グルタチオン / 安息香酸
Outline of Research at the Start

統合失調症の約30%の患者は薬物治療に反応しない(治療抵抗性統合失調症)。グルタミン酸受容体の機能低下仮説は陰性症状・認知機能障害を含め統合失調症の病態を包括的に説明するため、グルタミン酸神経が新たな治療標的として期待されている。
安息香酸ナトリウムはグルタミン酸系作動薬であり、治療抵抗性統合失調症に対する治療効果が報告されているが詳細な作用機序は不明のままである。
本研究は治療抵抗性統合失調症患者において、安息香酸ナトリウム による治療前後に、脳内グルタミン酸とグルタチオン濃度を測定し、安息香酸ナトリウムの脳内グルタミン酸濃度とグルタチオン濃度への影響、症状が改善する患者の特徴を明らかにする。

Outline of Final Research Achievements

This study is the first to administer the glutamatergic agent sodium benzoate (a D-amino acid oxidase inhibitor) to treatment-resistant schizophrenia patients and measure the concentrations of glutamate and glutathione in the brain. In the course of this research, the HERMES imaging protocol, which measures GABA and glutathione using MRS, was introduced to Yamanashi University for the first time in Japan. The data quality was without issues, and the study, including cognitive function tests, was conducted smoothly. Moving forward, data analysis will be performed, and the results will be reported.

Academic Significance and Societal Importance of the Research Achievements

統合失調症の罹患率は人口の1%である。現在有効な薬物療法は抗精神病薬であるが、約3割の患者は治療に反応しない。統合失調症の病態仮説の一つにグルタミン酸受容体仮説というものがある。グルタミン酸仮説に基づいたグルタミン酸作動薬がこれまでに試されてきたがその作用機序について人体で脳内グルタミン酸を測定した研究はない。本研究によりグルタミン酸作動薬による脳内グルタミン酸の変化とその臨床効果について知見が得られた。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (4 results)

All 2023 2021 2019

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

  • [Journal Article] Disease Progression Patterns of Brain Morphology in Schizophrenia: More Progressed Stages in Treatment Resistance2023

    • Author(s)
      Sone Daichi、Young Alexandra、Shinagawa Shunichiro...Graff-Guerrero Ariel、Nakajima Shinichiro
    • Journal Title

      Schizophrenia Bulletin

      Volume: 50 Issue: 2 Pages: 393-402

    • DOI

      10.1093/schbul/sbad164

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Associations Between Structural Covariance Network and Antipsychotic Treatment Response in Schizophrenia2023

    • Author(s)
      Tsugawa Sakiko、Honda Shiori、Noda Yoshihiro、Wannan Cassandra、Zalesky Andrew、Tarumi Ryosuke、Iwata Yusuke、Ogyu Kamiyu、Plitman Eric、Ueno Fumihiko、Mimura Masaru、Uchida Hiroyuki、Chakravarty Mallar、Graff-Guerrero Ariel、Nakajima Shinichiro
    • Journal Title

      Schizophrenia Bulletin

      Volume: 50 Issue: 2 Pages: 382-392

    • DOI

      10.1093/schbul/sbad160

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Glutathione Levels and Glutathione-Glutamate Correlation in Patients With Treatment-Resistant Schizophrenia2021

    • Author(s)
      Yusuke Iwata, Shinichiro Nakajima, Eric Plitman, Peter Truong, Ali Bani-Fatemi, Fernando Caravaggio, Julia Kim, Parita Shah, Wanna Mar, Sofia Chavez, Gary Remington, Philip Gerretsen, Vincenzo De Luca, Napapon Sailasuta, Ariel Graff-Guerrero
    • Journal Title

      Schizophrenia Bulletin Open

      Volume: 2 Issue: 1

    • DOI

      10.1093/schizbullopen/sgab006

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Clozapine response trajectories and predictors of non-response in treatment-resistant schizophrenia: a chart review study2019

    • Author(s)
      Shah Parita、Iwata Yusuke、Brown Eric E.、Kim Julia、Sanches Marcos、Takeuchi Hiroyoshi、Nakajima Shinichiro、Hahn Margaret、Remington Gary、Gerretsen Philip、Graff-Guerrero Ariel
    • Journal Title

      European Archives of Psychiatry and Clinical Neuroscience

      Volume: 270 Issue: 1 Pages: 11-22

    • DOI

      10.1007/s00406-019-01053-6

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

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