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Search for targeted therapies for alpha-synuclein-induced neurotoxicity in STXBP1 encephalopathy

Research Project

Project/Area Number 21K07855
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52050:Embryonic medicine and pediatrics-related
Research InstitutionKyoto Prefectural University of Medicine

Principal Investigator

Chiyonobu Tomohiro  京都府立医科大学, 医学(系)研究科(研究院), 講師 (40571659)

Co-Investigator(Kenkyū-buntansha) 吉田 英樹  京都工芸繊維大学, 応用生物学系, 准教授 (30570600)
笠井 高士  京都府立医科大学, 医学(系)研究科(研究院), 准教授 (70516062)
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: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsSTXBP1 / αシヌクレイン / ショウジョウバエ / iPS細胞
Outline of Research at the Start

発達性てんかん性脳症(DEE)は多数の原因遺伝子が同定されているが、個別の遺伝子異常に基づいた治療は存在しない。近年、代表的なDEE原因遺伝子であるSTXBP1の機能不全とαシヌクレイン神経毒性の関連が注目されている。本研究では患者由来iPS細胞および遺伝子改変ショウジョウバエを用い、STXBP1機能不全によるαシヌクレイン神経毒性を明らかにする。さらに、ショウジョウバエとヒトiPS細胞を併用した効率的な薬剤評価系を構築する。本研究はDEEに対するプレシジョン医療実現に貢献しうることに加え、パーキンソン病を中心としたαシヌクレイノパチーの病態解明に新たな知見を与える可能性がある。

Outline of Final Research Achievements

We examined the pathology of α-synuclein neurotoxicity in STXBP1 encephalopathy. Microarray analysis using neurons obtained from patient-derived iPS cells revealed changes in the expression of SIAH3 and INPP5F, which have been reported to be associated with Parkinson's disease. We also showed that neurodegeneration observed in the Parkinson's disease model Drosophila was exacerbated by crossing with a mutant of Rop, the Drosophila ortholog of STXBP1. Furthermore, we showed that trehalose supplementation effectively alleviates neuronal phenotypes. These results connect STXBP1 encephalopathy with α-synucleinopathies.

Academic Significance and Societal Importance of the Research Achievements

発達性てんかん性脳症は多数の原因遺伝子が同定されているが、個別の病態に基づいた治療は存在せず、患者の神経予後は極めて不良である。本研究で発達性てんかん性脳症の代表的な原因遺伝子であるSTXBP1の機能不全とαシヌクレイン神経毒性の関連を示したことは、発達性てんかん性脳症のプレシジョン医療実現に貢献しうると考えられる。

Report

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

    (6 results)

All 2024 2023 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] α-Synuclein pathology in <i>Drosophila melanogaster</i> is exacerbated by haploinsufficiency of <i>Rop</i>: connecting <i>STXBP1</i> encephalopathy with α-synucleinopathies2024

    • Author(s)
      Matsuoka Taro、Yoshida Hideki、Kasai Takashi、Tozawa Takenori、Iehara Tomoko、Chiyonobu Tomohiro
    • Journal Title

      Human Molecular Genetics

      Volume: - Issue: 15 Pages: 1328-1338

    • DOI

      10.1093/hmg/ddae073

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impaired neuronal activity and differential gene expression in STXBP1 encephalopathy patient iPSC-derived GABAergic neurons2021

    • Author(s)
      Ichise Eisuke、Chiyonobu Tomohiro、Ishikawa Mitsuru、Tanaka Yasuyoshi、Shibata Mami、Tozawa Takenori、Taura Yoshihiro、Yamashita Satoshi、Yoshida Michiko、Morimoto Masafumi、Higurashi Norimichi、Yamamoto Toshiyuki、Okano Hideyuki、Hirose Shinichi
    • Journal Title

      Human Molecular Genetics

      Volume: - Issue: 14 Pages: 1337-1348

    • DOI

      10.1093/hmg/ddab113

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] alpha-Synuclein pathology in Drosophila melanogaster is exacerbated by haploinsufficiency of Rop: Connecting STXBP1 encephalopathy with alpha-synucleinopathies.2023

    • Author(s)
      Matsuoka T, Yoshida H, Kasai T, Tozawa T, Chiyonobu T.
    • Organizer
      American Society of Human Genetics Annual Meeting 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] alpha-Synuclein pathology is exacerbated by haploinsufficiency of Rop, the STXBP1 homolog in Drosophila melanogaster.2023

    • Author(s)
      Matsuoka T, Yoshida H, Kasai T, Tozawa T, Chiyonobu T.
    • Organizer
      日本人類遺伝学会第68回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Functional and transcriptomic analysis of STXBP1 encephalopathy iPSC-derived GABAergic neurons.2021

    • Author(s)
      Ichise E, Chiyonobu T, Ishikawa M, Tanaka Y, Tozawa T, Yamashita S, Yoshida M, Higurashi N, Yamamoto T, Okano H, Hirose S.
    • Organizer
      第63回日本小児神経学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] Impaired activity and differential gene expression in STXBP1 encepalopathy patient iPSC-derived GABAergic neurons.2021

    • Author(s)
      Ichise E, Chiyonobu T, Ishikawa M, Tanaka Y, Shibata M, Tozawa T, Yamashita S, Yoshida M, Morimoto M, Higurashi N, Yamamoto T, Okano H, Hirose S.
    • Organizer
      日本人類遺伝学会第66回大会
    • Related Report
      2021 Research-status Report

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

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