• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Analysis of the oxytocin and GABA pathway in refractory schizophrenia

Research Project

Project/Area Number 21K07476
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52030:Psychiatry-related
Research InstitutionChiba University

Principal Investigator

Kanahara Nobuhisa  千葉大学, 社会精神保健教育研究センター, 講師 (70507350)

Co-Investigator(Kenkyū-buntansha) 伊藤 文晃  東北大学, 医学系研究科, 大学院非常勤講師 (10535157)
仲田 祐介  千葉大学, 医学部附属病院, 助教 (40836962)
Project Period (FY) 2021-04-01 – 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 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywordsドパミントランスポーター / GABA / クロザピン / ドパミン過感受性 / 治療抵抗性統合失調症 / 経頭蓋磁気刺激装置 / 皮質静止 / 遺伝子多型 / オキシトシン / 統合失調症 / 治療抵抗性 / 経頭蓋磁気刺激
Outline of Research at the Start

本課題では治療抵抗性統合失調症(TRS)患者の病態にオキシトシンやGABA系システムが関与し、これらは通常の統合失調症患者とは異なる神経基盤を有していることを検証することを目的とする。そのためにTRS患者、非TRS患者、健常者から血液試料を採取して、オキシトシンやGABAの血液中濃度測定(生化学的手法)、GABA・オキシトシンシステムの遺伝子多型検索(遺伝子学的手法)、経頭蓋磁気刺激(TMS)装置を用いた皮質静止時間(CSP:中枢GABA信号伝達の間接的指標)の測定(電気生理学的手法)を用いてデータを収集し、解析を実施する。

Outline of Final Research Achievements

We performed a genetic association analysis of dopamine-related genes of patients with treatment-resistant schizophrenia (TRS). The results showed that the distribution of rs3456450 on SLC6A3 gene differed between the TRS and non-TRS/healthy control groups. An additional analysis combining rs3456450 and a functional SNP of COMT (rs4680) suggested a higher percentage of the TRS patients with the genotype combination of “low-dopamine state” compared to the non-TRS patients. In addition, we conducted a systematic review and meta-analysis of the effects of disease stage and antipsychotic medication on cortical silent period (CSP). The results showed that only clozapine significantly prolonged the CSP whereas other medications and disease stage did not seem to affect the CSP. Lastly, the multi-site retrospective study examining the efficacy of clozapine on TRS patients suggested that patients with the late-onset TRS could represent larger response to those with the early-onset TRS.

Academic Significance and Societal Importance of the Research Achievements

TRSに対するclozapineの反応性に関して、ドパミン系信号が関わる可能性、またclozapineがGABA信号を強化させることを示唆する。このことはclozapineの作用機序に関する理解を進めるものである。また臨床的にclozapineは後発型TRSにより効果が期待される可能性がある。後発型TRSの多くはドパミン過感受性との関連が推定されることから、ドパミン過感受性形成状態はclozapineによる反応性と関係することが示唆される。これらは臨床的にclozapineの適応や導入時期の判断に有用となる可能性があると考えられる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (33 results)

All 2024 2023 2022 2021

All Journal Article (19 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 15 results,  Open Access: 2 results) Presentation (14 results) (of which Invited: 4 results)

  • [Journal Article] A retrospective clinical practice study comparing the usefulness of dual-orexin receptor antagonists and a melatonin receptor agonist in patients switching from long-term benzodiazepine receptor agonists2024

    • Author(s)
      Tashibana M, Kanahara N, Oda Y, Hasegawa T, Kimura A, Iyo M.
    • Journal Title

      J Clin Sleep Med

      Volume: 20 (4) Issue: 4 Pages: 603-610

    • DOI

      10.5664/jcsm.10946

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Association of SLC6A3 variants with treatment-resistant schizophrenia: a genetic association study of dopamine-related genes in schizophrenia2024

    • Author(s)
      Kogure M, Kanahara N, MIyazawa A, Shiko Y, Otsuka I, Matsuyama K, Takase M, Kimura M, Kimura H, Ota K, Idemoto K, Tamura M, Oda Y, Yoshida T, Okazaki S, Yamasaki F, Nakata Y, Watanabe Y, Niitsu T, Hishimoto A, Iyo M.
    • Journal Title

      Front Psychiatry

      Volume: 14 Pages: 1334335-1334335

    • DOI

      10.3389/fpsyt.2023.1334335

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 統合失調症として治療され、先天性心疾患や特徴的顔貌を欠くものの、22q11.2欠失症候群と診断された一例2024

    • Author(s)
      松山光一, 金原信久, 阿久津実彩, 佐々木剛, 小松尚也, 伊豫雅臣.
    • Journal Title

      精神科治療学

      Volume: 39 (3) Pages: 341-346

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Can brexpiprazole be switched safely in patients with schizophrenia and dopamine supersensitivity psychosis? A retrospective analysis in a real-world clinical practice2023

    • Author(s)
      Yamasaki F, Kanahara N, Nakata Y, Koyoshi S, Yanagisawa Y, Saito T, Oiwa T, Kogure M, Sasaki T, Yoshida T, Kimura H, Iyo M.
    • Journal Title

      J Psychopharmacol

      Volume: 37(10) Issue: 10 Pages: 992-1002

    • DOI

      10.1177/02698811231177268

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The impact of childhood trauma exposure on social functioning in schizophrenia: the moderated mediation role of oxytocin and oxytocin receptor gene polymorphisms2023

    • Author(s)
      Goh KK, Kanahara N, Chiu YH, Lu ML.
    • Journal Title

      Psychol Med

      Volume: 54 (5) Issue: 5 Pages: 980-992

    • DOI

      10.1017/s003329172300274x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 精神科救急医療施設への入院後、治療抵抗性統合失調症の可能性を検討するなかで、先天性心疾患の既往が手がかりとなり、22q11.2欠失症候群と診断された1例-精神科救急単科病院、臨床現場からの報告-2023

    • Author(s)
      松山光一, 金原信久, 花岡晋平.
    • Journal Title

      精神神経学会誌

      Volume: 124 (4) Pages: 233-238

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dopamine supersensitivity psychosis and delay of clozapine treatment in patients with treatment-resistant schizophrenia2023

    • Author(s)
      Masumo Y, Kanahara N, Kogure M, Yamasaki F, Nakata Y, Iyo M,
    • Journal Title

      Int Clin Psychopharmacol

      Volume: 38 Pages: 102-109

    • DOI

      10.1097/yic.0000000000000442

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Efficacy of Asenapine in Drug-resistant Psychotic Patients with Dopamine Supersensitivity Psychosis: Two Cases2023

    • Author(s)
      Kanahara Nobuhisa、Kimura Hiroshi、Kinoshita Toshihiko、Iyo Masaomi、Takekita Yoshiteru
    • Journal Title

      Clinical Psychopharmacology and Neuroscience

      Volume: 21 Issue: 1 Pages: 197-201

    • DOI

      10.9758/cpn.2023.21.1.197

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 遅発性ジスキネジアの病態仮説2023

    • Author(s)
      金原信久, 伊豫雅臣
    • Journal Title

      臨床精神薬理

      Volume: 26

    • Related Report
      2022 Research-status Report
  • [Journal Article] バルベナジンの基礎2023

    • Author(s)
      金原信久, 伊豫雅臣
    • Journal Title

      精神科

      Volume: 42 Pages: 413-418

    • Related Report
      2022 Research-status Report
  • [Journal Article] 遅発性ジスキネジアの新しい治療2023

    • Author(s)
      金原信久, 伊豫雅臣
    • Journal Title

      臨床精神医学

      Volume: 52 Pages: 433-437

    • Related Report
      2022 Research-status Report
  • [Journal Article] 治療抵抗性統合失調症の臨床研究2023

    • Author(s)
      金原信久
    • Journal Title

      精神医学

      Volume: 65

    • Related Report
      2022 Research-status Report
  • [Journal Article] Long-Term Treatment With Long-Acting Injectable Antipsychotic in Schizophrenia Patients With and Without Dopamine Supersensitivity Psychosis: A 6-Year Retrospective Comparative Study2022

    • Author(s)
      Kogure M, Kanahara N, Kimura M, Hanaoka S, Hirano H, Iyo M
    • Journal Title

      J Clin Psychopharmacol

      Volume: 42 Issue: 4 Pages: 357-364

    • DOI

      10.1097/jcp.0000000000001564

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] The effects of cumulative antipsychotic dose on brain structures in patients with schizophrenia: Observational study of multiple CT scans over a long-term clinical course2022

    • Author(s)
      Kanahara N, Yamanaka H, Shiko Y, Kawasaki Y, Iyo M.
    • Journal Title

      Psychiatry Res Neuroimaging

      Volume: 319 Pages: 111422-111422

    • DOI

      10.1016/j.pscychresns.2021.111422

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] The cortical silent period in schizophrenia: A systematic review and meta-analysis focusing on disease stage and antipsychotic medication2022

    • Author(s)
      Miyazawa A, Kanahara N, Shiko Y, Ozawa Y, Kawasaki Y, Komatsu H, Masumo Y, Nakata Y, Iyo M.
    • Journal Title

      J Psychopharmacol

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Clozapine Prolongs Cortical Silent Period in Patients with Treatment-Resistant Schizophrenia2021

    • Author(s)
      Miyazawa A, Kanahara N, Nakata Y, Kodama S, Kimura H, Kimura A, Oda Y, Watanabe H, Iyo M.
    • Journal Title

      Psychopharmacol Bull

      Volume: 51 Pages: 20-30

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Oxytocin system dysfunction in patients with treatment-resistant schizophrenia: Alterations of blood oxytocin levels and effect of a genetic variant of OXTR2021

    • Author(s)
      Nakata Y, Kanahara N, Kimura A, Niitsu T, Komatsu H, Oda Y, Nakamura M, Ishikawa M, Hasegawa T, Kamata Y, Yamauchi A, Inazumi K, Kimura H, Shiko Y, Kawasaki Y, Iyo M.
    • Journal Title

      J Psychiatr Res

      Volume: 138 Pages: 219-227

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Interacting Roles of COMT and GAD1 Genes in Patients with Treatment-Resistant Schizophrenia: a Genetic Association Study of Schizophrenia Patients and Healthy Controls2021

    • Author(s)
      Kogure M, Kanahara N, Miyazawa A, Oishi K, Nakata Y, Oda Y, Iyo M.
    • Journal Title

      J Mol Neurosci

      Volume: 71 Issue: 12 Pages: 2575-2582

    • DOI

      10.1007/s12031-021-01866-y

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A preliminary genetic association study of GAD1 and GABAB receptor genes in patients with treatment-resistant schizophrenia2021

    • Author(s)
      Miyazawa Atsuhiro、Kanahara Nobuhisa、Kogure Masanobu、Otsuka Ikuo、Okazaki Satoshi、Watanabe Yoshinori、Yamasaki Fumiaki、Nakata Yusuke、Oda Yasunori、Hishimoto Akitoyo、Iyo Masaomi
    • Journal Title

      Molecular Biology Reports

      Volume: 49 Issue: 3 Pages: 2015-2024

    • DOI

      10.1007/s11033-021-07019-z

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 統合失調症として治療され、先天性心疾患や特徴的顔貌を欠くものの、22q11.2欠失症候群と診断された一例2023

    • Author(s)
      松山光一, 金原信久, 阿久津実彩, 佐々木剛, 小松尚也, 伊豫雅臣.
    • Organizer
      第119回日本精神神経学会学術総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Dopamine supersensitivity and dopamine supersensitivity psychosis in patients with schizophrenia: the importance of identifying their signs and current perspectives in clinical research2023

    • Author(s)
      金原信久.
    • Organizer
      第119回日本精神神経学会学術総会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 遅発性ジスキネジアを含む遅発性錐体外路症候群の難治症例について2023

    • Author(s)
      金原信久.
    • Organizer
      第33回日本臨床精神神経薬理学会年会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 治療抵抗性統合失調症患者におけるクロザピン治療反応性に関する頭部MRI画像の検討2023

    • Author(s)
      増茂悠人, 金原信久, 大塚祐司, 井手本啓太, 桝田善正, 石井照之, 伊豫雅臣.
    • Organizer
      第26回日本精神保健予防学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Benzodiazepine系睡眠薬長期服薬患者の減薬におけるorexin受容体拮抗薬及びmelatonin受容体作動薬の有用性に関する後方視研究2023

    • Author(s)
      橘真澄, 金原信久, 小田靖典, 長谷川直, 木村敦史, 伊豫雅臣.
    • Organizer
      第26回日本精神保健予防学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 統合失調症患者のレジリエンスとセルフスティグマに焦点を当てた心理教育の可能性:予備的検討2023

    • Author(s)
      金原信久, 小林玲美子, 小松浩, 伊豫雅臣.
    • Organizer
      第26回日本精神保健予防学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 統合失調症として治療され、先天性心疾患や特徴的顔貌を欠くものの、22q11.2欠失症候群と診断された一例2023

    • Author(s)
      松山光一, 金原信久, 阿久津実彩, 佐々木剛, 小松尚也, 伊豫雅臣.
    • Organizer
      第26回日本精神保健予防学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ドパミン過感受性精神病を含む治療抵抗性統合失調症患者を対象とする長半減期型非定型抗精神病薬とクロザピンの有効性の検証: 多施設共同観察研究2023

    • Author(s)
      金原信久、仲田祐介、伊豫雅臣、大迫鑑顕、鈴木均、木村大、渡部芳徳、比留間真由美、井手本啓太、田村真樹、太田喜代光、吉田泰介、山中浩嗣、青木勉、斎賀孝久、野々村司、横山大輔
    • Organizer
      第40回千葉精神科集談会
    • Related Report
      2022 Research-status Report
  • [Presentation] 遅発性症候群としての遅発性ジスキネジアの課題: 精神症状との関係2022

    • Author(s)
      金原信久
    • Organizer
      第32回日本臨床精神神経薬理学会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 治療抵抗性統合失調症患者の診断とドパミン過感受性精神病2022

    • Author(s)
      金原信久
    • Organizer
      第118回日本精神神経学会学術総会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 治療抵抗性統合失調症におけるγ-アミノ酪酸(GABA)神経系異常の探索2021

    • Author(s)
      宮澤惇宏、増茂悠人、小暮正信、山﨑史暁、仲田祐介、金原信久、伊豫雅臣
    • Organizer
      第31回日本臨床精神神経薬理学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 統合失調症患者における抗精神病薬の脳構造への影響:古い頭部CT画像を用いた縦断研究2021

    • Author(s)
      金原信久、山中浩嗣、仕子優樹、川崎洋平、伊豫雅臣
    • Organizer
      第31回日本臨床精神神経薬理学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 統合失調症患者における抗精神病薬持効性注射剤(LAI)による長期治療の効果に関わる検討2021

    • Author(s)
      小暮正信、金原信久、木村允、花岡晋平、平野弘美、仲田祐介、伊豫雅臣
    • Organizer
      第31回日本臨床精神神経薬理学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 治療抵抗性統合失調症におけるクロザピン導入遅延と治療効果の関連に関する検討2021

    • Author(s)
      増茂悠人、金原信久、小暮正信、山﨑史暁、仲田祐介、伊豫雅臣
    • Organizer
      第31回日本臨床精神神経薬理学会
    • Related Report
      2021 Research-status Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi