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Research for a new pathogenesis of lysosomal disease in Parkinson's disease onset mechanism

Research Project

Project/Area Number 19K17019
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52020:Neurology-related
Research InstitutionJuntendo University

Principal Investigator

Oji Yutaka  順天堂大学, 医学部, 准教授 (60777845)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsパーキンソン病 / リソソーム病 / プロサポシン / α-シヌクレイン / スフィンゴ糖脂質 / ゴルジ装置 / 家族性パーキンソン病 / 糖鎖修飾 / リソソーム蛋白 / リゾリン脂質 / カルニチン / 長鎖脂肪酸 / 不溶性画分 / シナプス蛋白 / iPS細胞 / サポシンD / スフィンゴ脂質 / スフィンゴミエリン / αシヌクレイン / リソソーム酵素
Outline of Research at the Start

パーキンソン病は脳内ドパミン不足により進行性の運動障害を起こす神経変性疾患である。根本治療や疾患修飾療法の開発のため病態解明が喫緊の課題である。本研究では、3家系の常染色体優性遺伝性パーキンソン病患者にリソソーム病関連遺伝子の新規遺伝子変異を発見したことに基づき、患者iPS細胞や遺伝子変異導入マウスを用い脂質組成変化やリソソーム酵素活性の変化に着目した研究を行う。家族性パーキンソン病の新規原因遺伝子変異における、リソソーム機能障害に関連した酵素活性低下や脂質変化を捉えることで病態解明を目指し創薬を目指した治療ターゲットを探索する。

Outline of Final Research Achievements

In this study, we found that the prosaposin gene (PSAP), which encodes a saposin involved in glycosphingolipid metabolism, is the causative gene of familial Parkinson's disease (PD) (Oji, et al. Brain 2020). We analyzed skin fibroblasts and iPS cell-derived dopaminergic neurons of PD patients with PSAP mutations. Then we found abnormal intracellular transport of prosaposin, abnormalities of autophagy-lysosomal system, and an aggregateed α-synuclein. Additionally, PD-related PSAP mutation-introduced iPS cell-derived dopaminergic neurons exhibited abnormalities in the Golgi apparatus, which suggested that there is a possibility that Golgi apparatus abnormalities are involved in the pathogenesis of PD.

Academic Significance and Societal Importance of the Research Achievements

近年、ゴーシェ病を始めとするリソソーム病の原因遺伝子がパーキンソン病の発症に関与することが注目されており、本研究で明らかになったプロサポシン遺伝子はパーキンソン病の発症メカニズムにおけるリソソーム病の関与を強く示唆するものである。患者由来iPS細胞や皮膚線維芽細胞、パーキンソン病関連プロサポシン遺伝子変異導入iPS細胞、プロサポシン変異マウスの解析によりパーキンソン病の病態につながる可能性のある変化が見出されており、プロサポシン遺伝子の更なる機能解析によりパーキンソン病の病態が明らかになる可能性が高いと考えられる。

Report

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

    (6 results)

All 2020

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Variants in saposin D domain of prosaposin gene linked to Parkinson’s disease2020

    • Author(s)
      Oji Y, Hatano T, Ueno SI, Funayama M, Ishikawa KI, Okuzumi A, Noda S, Sato S, Satake W, Toda T, Li Y, Hino-Takai T, Kakuta S, Tsunemi T, Yoshino H, Nishioka K, Hattori T, Mizutani Y, Mutoh T, Yokochi F, et al.
    • Journal Title

      Brain

      Volume: 143 Issue: 4 Pages: 1190-1205

    • DOI

      10.1093/brain/awaa064

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Variants in the saposin D domain of prosaposin gene are linked to Parkinson's disease2020

    • Author(s)
      Yutaka Oji
    • Organizer
      Movement Disorder Society MDS virtual congress
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 神経筋疾患の理解、治療に向けた研究の最前線 パーキンソン病はライソゾーム病か?2020

    • Author(s)
      王子悠
    • Organizer
      日本人類遺伝学会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Variants in Saposin D Domain of Prosaposin Gene are Linked to Parkinson’s Disease2020

    • Author(s)
      Yutaka Oji
    • Organizer
      145th Annual Meeting American Neurological Association
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Variants in saposin D domain of prosaposin gene linked to Park inson's disease2020

    • Author(s)
      王子悠, 波田野琢 , 上野真一, 舩山学, 石川景一, 奥住文美, 常深泰司, 李元哲, 松田純子, 服部信孝
    • Organizer
      第61回日本神経学学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Variants in the saposin D domain of prosaposin gene are linked to Parkinson's disease2020

    • Author(s)
      Yutaka Oji, Taku Hatano, Shin-Ichi Ueno, Manabu Funayama, Kei-ichi Ishikawa, Ayami Okuzumi, Shigeto Sato, Yuanzhe Li, Taiji Tsunemi, Hiroyo Yoshino, Kenya Nishioka, Matthew J Farrer, Yasuo Uchiyama, Wado Akamatsu, Yih-Ru Wu, Junko Matsuda, Nobutaka Hattori
    • Organizer
      International Congress of Parkinson's Disease and Movement Disorders
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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