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Exploration of the mechanism of a-synuclein propagation from peripheral tissues to the central nervous system via exosomes

Research Project

Project/Area Number 21K07444
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52020:Neurology-related
Research InstitutionJuntendo University

Principal Investigator

Tsunemi Taiji  順天堂大学, 大学院医学研究科, 准教授 (50401344)

Co-Investigator(Kenkyū-buntansha) 赤松 和土  順天堂大学, 大学院医学研究科, 教授 (60338184)
竹下 幸男  山口大学, 大学院医学系研究科, 助教 (70749829)
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: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsパーキンソン病 / αシヌクレイン / 血管脳関門 / アルファシヌクレイン / iPS細胞
Outline of Research at the Start

パーキンソン病の病理学的特徴の一つはレヴィ小体形成であるが、その主要構成成分であるアルファシヌクレイン(a-syn)が細胞内蓄積し、末梢組織から中枢神経へ、そして神経細胞間を伝播する機序は未解決である。本研究は、エキソソームがa-synの蓄積、神経細胞間、末梢組織から中枢神経間の伝播に与える影響を検討し、この経路をターゲットとした新規治療法を開発する。そのため患者iPS細胞から作成したドパミン細胞、星状細胞とin vitro BBBモデル、マウスモデルを駆使しエキソソームによる中枢神経侵入とa-synの脳内拡散機序を解明し、ここをターゲットとする新規治療法を開発する。

Outline of Final Research Achievements

We successfully differentiated induced pluripotent stem cells (iPSCs) into vascular endothelial cells, mural cells, and astrocytes. We established an iPSC-derived blood-brain barrier (iBBB) model by culturing vascular endothelial cells on an insert membrane and mural cells and astrocytes on the plate bottom, maintaining the multilayer structure of vascular endothelial cells. This model exhibited size-dependent permeability, tight junction, and receptor functions. Exposure to α-synuclein (a-syn) in both a Parkinson's disease model having SNCA A53T mutation and normal vascular endothelial cells altered the receptor-dependent permeability of vascular endothelial cells. Still, it did not affect the expression levels of known receptors that transport a-syn, nor were any novel receptors identified.

Academic Significance and Societal Importance of the Research Achievements

本研究の最大の成果は、従来はヒト不死化細胞を用いてしか作成されなかった血液脳関門(BBB)モデルをiPS細胞から各々の細胞に分化し構築し得たことである。そしてパーキンソン病患者から作成したiBBB、健常人から作成したiBBBもa-synに暴露されるとその透過性が変化し、全身から中枢神経へa-synが移行が変化することを見出した。この機序は不明であるが、既知のレセプター機能の亢進によるものと考えられた。
iBBBの確立により、パーキンソン病以外の他の神経変性疾患、免疫疾患、感染症におけるBBBの詳細な機能変化が解析可能となっており、今後の発展性の高い成果があったと言える。

Report

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

    (18 results)

All 2024 2023 2022 2021

All Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (13 results) (of which Int'l Joint Research: 11 results,  Invited: 5 results)

  • [Journal Article] Efficacy and Safety of Elobixibat in Parkinson's Disease with Chronic Constipation: <scp>CONST‐PD</scp> Study2024

    • Author(s)
      Hatano Taku,Kamo Hikaru(27番目),Hattori Nobutaka
    • Journal Title

      Movement Disorders Clinical Practice

      Volume: 11 Issue: 4 Pages: 352-362

    • DOI

      10.1002/mdc3.13972

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Statement of the on Biological Definition, Staging, and Classification of Parkinson's Disease2023

    • Author(s)
      Cardoso F、Goetz CG.、Mestre TA.、Berg D、Bloem BR.、Burn DJ.、Fitts Michael S.、Gasser Thomas、Klein Christine、de Tijssen MA.J.、Lang AE.、Lim SY、Litvan Irene、Meissner W G.、Mollenhauer B、Okubadejo N、Okun Michael S.、Postuma RB.、Pan Louis C.S.、Tsunemi T、Wahlstrom HS、Fung VSC.、Trenkwalder C
    • Journal Title

      Movement Disorders

      Volume: 39 Issue: 2 Pages: 259-266

    • DOI

      10.1002/mds.29683

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Propagative α-synuclein seeds as serum biomarkers for synucleinopathies.2023

    • Author(s)
      Ayami Okuzumi Taku Hatano Gen Matsumoto Nobutaka Hattori et al
    • Journal Title

      Nature medicine

      Volume: 29 Issue: 6 Pages: 1448-1455

    • DOI

      10.1038/s41591-023-02358-9

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Oxidative stress‐induced phosphorylation of JIP4 regulates lysosomal positioning in coordination with TRPML1 and ALG22022

    • Author(s)
      Sasazawa Yukiko、Souma Sanae、Furuya Norihiko、Miura Yoshiki、Kazuno Saiko、Kakuta Soichiro、Suzuki Ayami、Hashimoto Ryota、Hirawake‐Mogi Hiroko、Date Yuki、Imoto Masaya、Ueno Takashi、Kataura Tetsushi、Korolchuk Viktor I、Tsunemi Taiji、Hattori Nobutaka、Saiki Shinji
    • Journal Title

      The EMBO Journal

      Volume: 41 Issue: 22

    • DOI

      10.15252/embj.2022111476

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Pathophysiological evaluation of the LRRK2 G2385R risk variant for Parkinson’s disease.2022

    • Author(s)
      Tezuka T, Taniguchi D, Sano M, Shimada T, Oji Y, Tsunemi T, Ikeda A, Li Y, Yoshino H, Ogata J, Shiba-Fukushima K, Funayama M, Nishioka K, Imai Y, Hattori N.
    • Journal Title

      NPJ Parkinsons Dis.

      Volume: 8 Issue: 1 Pages: 97-97

    • DOI

      10.1038/s41531-022-00367-y

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] The effect of lumboperitoneal shunt surgery on patients with iNPH plus Parkinson’s disease2023

    • Author(s)
      Tsunemi T, Shimada T, Sakurai A, Nakajima M, and Hattori N.
    • Organizer
      International Congress of Parkinson’s Disease and Movement Disorders 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The effect of lumboperitoneal shunt surgery on iNPH comorbid with Parkinson’s disease2023

    • Author(s)
      Tsunemi T, Shimada T, Sakurai A, Nakajima M, and Hattori N.
    • Organizer
      第53回日本神経精神薬理学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] パーキンソン病併存正常圧水頭症に対する腰椎-腹腔シャント術の前向き試験. 第41回日本神経治療学会. 2023年11月5日.東京2023

    • Author(s)
      常深泰司、島田知世、服部安莉、川村海渡、中島円、宮嶋雅一、服部信孝 .
    • Organizer
      第41回日本神経治療学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Exosomes contribute to the development of Parkinson’s disease2023

    • Author(s)
      Taiji Tsunemi, Yuta Ishiiguro, Tomoyo Shimada, Ayako Yoroisaka, Nobutaka Hattori.
    • Organizer
      The 22nd “Takamatsu” International Symposium for PD & MD in Tokyo
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] WHAT KIND OF STAGING SYSTEM WOULD BE APPROPRIATE FOR PD? Biomarker Issues2023

    • Author(s)
      Tsunemi T and Hattori N.
    • Organizer
      MDS consensus meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Role of exosomes in the development of synucleinopathies2023

    • Author(s)
      Tsunemi T and Hattori N.
    • Organizer
      The 42th Annual Meeting of Japan Society of Dementia Research
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Advancements in biomarkers for Parkinson's disease targeting α-Synuclein2023

    • Author(s)
      Tsunemi T, Hatano T, and Hattori N.
    • Organizer
      APPS2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 21.Blood-brain barrier: a novel therapeutic target for neurological disorders.2022

    • Author(s)
      Taiji Tsunemi AND Nobutaka Hattori
    • Organizer
      第63回日本神経学会学術大会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Glial exosomal secretion contributes to α-synuclein accumulation and propagation in brains2022

    • Author(s)
      Taiji Tsunemi, Yuta Ishiguro, Asako Yoroisaka, Tomoyo Shimada, Wado Akamatsu, Nobutaka Hattori
    • Organizer
      第63回日本神経学会学術大会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Establishment of iPSC derived-Blood Brain Barrier2022

    • Author(s)
      Tomoyo Shimada, Asako Yoroisaka, Taiji Tsunemi, Nobutaka Hattori
    • Organizer
      第63回日本神経学会学術大会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Exosomal α-synuclein filaments as a novel biomarker for Parkinson's disease2022

    • Author(s)
      Yuta Ishiguro, Taiji Tsunemi, Asako Yoroisaka, Tomoyo Shimada, Nobutaka Hattori
    • Organizer
      第63回日本神経学会学術大会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Altered levels of exosomal secretion affect α-synuclein accumulation and propagation in brains2021

    • Author(s)
      Taiji Tsunemi, Yuta Ishiguro, Asako Yoroisaka, Nobutaka Hattori
    • Organizer
      62th Annual Meeting of the Japanese Society of Neurology
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Exosomal alpha-synuclein filaments as a novel biomarker for Parkinson's disease2021

    • Author(s)
      Yuta Isiguro, Taiji Tsunemi, Asako Yoroisaka, Nobutaka Hattori
    • Organizer
      62th Annual Meeting of the Japanese Society of Neurology
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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

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