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Elucidation of the mechanism of LRRK2 activation induced by lysosomal stress and its application to drug development

Research Project

Project/Area Number 19K07816
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kuwahara Tomoki  東京大学, 大学院医学系研究科(医学部), 講師 (10533903)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsLRRK2 / リソソーム / Rab / リン酸化 / パーキンソン病 / αシヌクレイン
Outline of Research at the Start

LRRK2(Leucine-rich repeat kinase 2)は家族性パーキンソン病(PD)の病因遺伝子であり、PDにおいてLRRK2の異常活性化が示唆されている。本研究では細胞内小器官であるリソソームへのストレス負荷によりLRRK2が活性化されることに着目し、LRRK2活性化をもたらす分子メカニズムの全貌を明らかにすることを目標とする。そのために、LRRK2の活性化を簡便に評価できるハイスループットなアッセイ系を構築し、網羅的な遺伝学的解析から新規のLRRK2活性制御因子を同定する。また創薬への応用として、LRRK2の活性化機構の阻害による新たな作用機序の創薬を提案する。

Outline of Final Research Achievements

LRRK2 is a major causative protein for Parkinson’s disease (PD), and is a kinase that phosphorylates Rab GTPases such as Rab8 and Rab10 in cells. Since hyperactivation of LRRK2 has been implicated in PD, we sought to elucidate the regulatory mechanism of LRRK2 activation. In this study, we found that LRRK2 activity to phosphorylate Rab is enhanced by lysosomal stress loading to cells, that multiple regulatory factors including Rab29 are involved in the activation process, and that LRRK2 activation causes the extracellular release of alpha-synuclein, another PD-causative protein accumulated in PD brains.

Academic Significance and Societal Importance of the Research Achievements

LRRK2の異常活性化の抑制はパーキンソン病の新規治療戦略として有望と考えられるが、本研究から、LRRK2活性化に関わる制御因子や経路が明らかになったことで、それらの因子も創薬標的になりうると考えられた。学術的には、LRRK2を中心とした新規のリソソームストレス応答機構とその制御メカニズムを見出したことで、細胞の恒常性維持機構に対する新たな理解が得られた。

Report

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

    (22 results)

All 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (10 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Book (1 results) Remarks (2 results)

  • [Int'l Joint Research] University of East Anglia(英国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Memorial Sloan Kettering Cancer Center(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Memorial Sloan Kettering Cancer Center(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Targeting of Lysosomal Pathway Genes for Parkinson's Disease Modification: Insights from Cellular and Animal Models.2021

    • Author(s)
      Abe T., Kuwahara T.
    • Journal Title

      Frontiers in Neurology

      Volume: 12 Pages: 681369-681369

    • DOI

      10.3389/fneur.2021.681369

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Functional Assessment of LRRK2 in Caenorhabditis elegans Mechanosensory Neurons.2021

    • Author(s)
      Kuwahara T.
    • Journal Title

      Methods in Molecular Biology

      Volume: 2322 Pages: 175-184

    • DOI

      10.1007/978-1-0716-1495-2_17

    • ISBN
      9781071614945, 9781071614952
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Two methods to analyze LRRK2 functions under lysosomal stress: the measurements of cathepsin release and lysosomal enlargement.2021

    • Author(s)
      Sakurai M., Kuwahara T.
    • Journal Title

      Methods in Molecular Biology

      Volume: 2322 Pages: 63-72

    • DOI

      10.1007/978-1-0716-1495-2_7

    • ISBN
      9781071614945, 9781071614952
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Roles of lysosomotropic agents on LRRK2 activation and Rab10 phosphorylation2020

    • Author(s)
      Kuwahara T., Funakawa K., Komori T., Sakurai M., Yoshii G., Eguchi T., Fukuda M., Iwatsubo T.
    • Journal Title

      Neurobiology of Disease

      Volume: 145 Pages: 105081-105081

    • DOI

      10.1016/j.nbd.2020.105081

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Emerging Functions of LRRK2 and Rab GTPases in the Endolysosomal System2020

    • Author(s)
      Tomoki Kuwahara, Takeshi Iwatsubo
    • Journal Title

      Frontiers in Neuroscience

      Volume: 14 Pages: 227-227

    • DOI

      10.3389/fnins.2020.00227

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Seeding Activity-Based Detection Uncovers the Different Release Mechanisms of Seed-Competent Tau Versus Inert Tau via Lysosomal Exocytosis2019

    • Author(s)
      Yuki Tanaka, Kaoru Yamada, Kyoko Satake, Itaru Nishida, Matthias Heuberger, Tomoki Kuwahara, Takeshi Iwatsubo
    • Journal Title

      Frontiers in Neuroscience

      Volume: 13 Pages: 1258-1258

    • DOI

      10.3389/fnins.2019.01258

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] パーキンソン病における新規リソソームストレス応答機構2021

    • Author(s)
      桑原知樹
    • Organizer
      第40回 日本認知症学会学術集会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Regulation of stressed lysosomes by LRRK2 in macrophage lineage cells2021

    • Author(s)
      Tomoki Kuwahara
    • Organizer
      International Research Conference on Neurodegenerative Diseases (IRCND) 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] リソソームストレス下におけるLRRK2依存的なリソソーム分泌経路の同定2021

    • Author(s)
      櫻井まりあ、桑原知樹、岩坪威
    • Organizer
      第40回 日本認知症学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] LRRK2とリソソームを介したαシヌクレイン細胞外放出機構の解析2021

    • Author(s)
      阿部哲郎、桑原知樹、末長祥一、櫻井まりあ、岩坪威
    • Organizer
      第40回 日本認知症学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Analysis of Rab29 phosphorylation under lysosomal overload stress2021

    • Author(s)
      Tomoki Kuwahara, Tadayuki Komori, Kai Funakawa, Maria Sakurai, Takeshi Iwatsubo
    • Organizer
      AD/PD 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Involvement of LRRK2 in the lysosomal and exosomal release2021

    • Author(s)
      Maria Sakurai, Tomoki Kuwahara, Tomoya Eguchi, Takeshi Iwatsubo
    • Organizer
      AD/PD 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Maintenance of lysosomal homeostasis by LRRK2 and Rab GTPases: Implications for the pathomechanism of Parkinson’s disease.2019

    • Author(s)
      Tomoki Kuwahara, Tomoya Eguchi, Maria Sakurai, Tadayuki Komori, Kai Funakawa, Takeshi Iwatsubo
    • Organizer
      World Parkinson Congress (WPC) 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] LRRK2と基質Rabによるリソソームストレス制御のメカニズム2019

    • Author(s)
      桑原知樹、江口智也、櫻井まりあ、小森禎之、舟川開、岩坪威
    • Organizer
      第92回日本生化学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] パーキンソン病病因遺伝子産物LRRK2がリソソーム恒常性維持に果たす役割の解析2019

    • Author(s)
      櫻井まりあ、桑原知樹、江口智也、岩坪威
    • Organizer
      第92回日本生化学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] パーキンソン病関連因子Rab7L1のリソソームにおける機能の解析2019

    • Author(s)
      小森禎之、桑原知樹、藤本哲太、舟川開、櫻井まりあ、岩坪威
    • Organizer
      第38回日本認知症学会学術集会
    • Related Report
      2019 Research-status Report
  • [Book] 医学のあゆみ2019

    • Author(s)
      桑原知樹
    • Total Pages
      2
    • Publisher
      医歯薬出版(株)
    • Related Report
      2019 Research-status Report
  • [Remarks] 東京大学大学院医学系研究科 神経病理学分野 ホームページ

    • URL

      http://www.neuropathology.m.u-tokyo.ac.jp/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 東京大学大学院医学系研究科神経病理学分野ホームページ

    • URL

      http://www.neuropathology.m.u-tokyo.ac.jp/

    • Related Report
      2020 Research-status Report 2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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