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Mechanism for the propagation and clearance of tau and alpha-synuclein proteins in neurodegenerative disease

Research Project

Project/Area Number 18K06542
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 46030:Function of nervous system-related
Research InstitutionNational Institutes for Quantum and Radiological Science and Technology

Principal Investigator

Takuwa Hiroyuki  国立研究開発法人量子科学技術研究開発機構, 放射線医学総合研究所 脳機能イメージング研究部, 研究員(任常) (40508347)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsタウ / 神経変性疾患 / クリアランス / ミクログリア / 神経細胞 / 二光子顕微鏡 / PET / 2光子顕微鏡 / マクロファージ / 脳内クリアランス / 認知症 / モデルマウス / in vivoイメージング / αシヌクレイン / 脳内伝播
Outline of Final Research Achievements

To better understand the mechanism of intracerebral accumulation and clearance of pathogenic proteins that cause neurodegenerative diseases, we performed in vivo brain imaging of disease model animals. We developed an experimental system for visualizing tau and α-synuclein at micrometer resolution using a two-photon microscope, and succeeded in longitudinally observing the accumulation of these pathogenic proteins in neurons. Moreover, we have longitudinally tracked neurons, microglia and aggregated tau with two-photon imaging. Neurons bearing tau fibrils underwent primary phagocytosis by activated microglia, followed by the transport of vesicles containing the neuronal fragments to the brain surface through vertical processes of the microglial cells. We observed that the microglia eventually released the neuronal fragments into the cerebrospinal fluid. Our findings indicate a newly microglial pathway for the clearance of misfolded proteins and neurons from the brain.

Academic Significance and Societal Importance of the Research Achievements

認知症は、病態進行とともに多くの医療費と介護を必要とし、患者本人にも社会的にも負荷が大きい疾患であり、一刻も早い治療法の開発が期待されている。本研究では、神経変性疾患発症の引き金となる病原性蛋白質の脳内蓄積および脳外排出メカニズムの一端を明らかにした。これらの病態メカニズムを基盤として、現在、病原性タンパクの蓄積・排出制御の実現のための研究を進めている。このような生体本来の機能を利用した治療法は、介入に伴う副次的な身体への負荷が小さくしながら、病気の原因を完全に除去することで大きな治療効果を生み出すことが期待される。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (18 results)

All 2021 2020 2019 2018

All Journal Article (10 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 10 results,  Open Access: 9 results) Presentation (5 results) (of which Int'l Joint Research: 2 results,  Invited: 5 results) Book (2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] High-Contrast In Vivo Imaging of Tau Pathologies in Alzheimer’s and Non-Alzheimer’s Disease Tauopathies2021

    • Author(s)
      Tagai K, Ono M, Kubota M, Kitamura S, Takahata K, Seki C, Takado Y, Shinotoh H, Sano Y, Yamamoto Y, Matsuoka K, Takuwa H, Shimojo M, (24人省略), Shimada H.
    • Journal Title

      Neuron

      Volume: 109 Issue: 1 Pages: 42-58

    • DOI

      10.1016/j.neuron.2020.09.042

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Three‐dimensional microvascular network reconstruction from in vivo images with adaptation of the regional inhomogeneity in the signal‐to‐noise ratio2021

    • Author(s)
      Sugashi Takuma、Yuki Hiroya、Niizawa Tomoya、Takuwa Hiroyuki、Kanno Iwao、Masamoto Kazuto
    • Journal Title

      Microcirculation

      Volume: in press Issue: 5

    • DOI

      10.1111/micc.12697

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dynamic alterations in the central glutamatergic status following food and glucose intake: in vivo multimodal assessments in humans and animal models2021

    • Author(s)
      Manabu Kubota, Yasuyuki Kimura, Masafumi Shimojo, Yuhei Takado, Joao M.N. Duarte, Hiroyuki Takuwa et al.,
    • Journal Title

      Journal of Cerebral Blood Flow & Metabolism

      Volume: in press

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Measurement of changes in endogenous serotonin level by positron emission tomography with [18F]altanserin2021

    • Author(s)
      Yoko Ikoma, Hiroyuki Takuwa, Asuka Nishino, Jun Maeda, Kazunori Kawamura, Takayuki Obata, Ming-Rong Zhang, Makoto Higuchi, Tetsuya Suhara
    • Journal Title

      Annals of Nuclear Medicine

      Volume: in press

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Selective Disruption of Inhibitory Synapses Leading to Neuronal Hyperexcitability at an Early Stage of Tau Pathogenesis in a Mouse Model.2020

    • Author(s)
      Shimojo M, Takuwa H, Takado Y, Tokunaga M, Tsukamoto S, Minatohara K, Ono M, Seki C, Maeda J, Urushihata T, Minamihisamatsu T, Aoki I, Kawamura K, Zhang MR, Suhara T, Sahara N, Higuchi M.
    • Journal Title

      J Neurosci.

      Volume: 40 Issue: 17 Pages: 3491-3501

    • DOI

      10.1523/jneurosci.2880-19.2020

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Deschloroclozapine: a potent and selective chemogenetic actuator enables rapid neuronal and behavioral modulations in mice and monkeys2020

    • Author(s)
      Nagai Y. et al
    • Journal Title

      Nature Neuroscience

      Volume: -

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Comparison of diffusion-weighted MRI and anti-Stokes Raman scattering (CARS) measurements of the inter-compartmental exchange-time of water in expression-controlled aquaporin-4 cells2018

    • Author(s)
      Obata Takayuki、Kershaw Jeff、Tachibana Yasuhiko、Miyauchi Takayuki、Abe Yoichiro、Shibata Sayaka、Kawaguchi Hiroshi、Ikoma Yoko、Takuwa Hiroyuki、Aoki Ichio、Yasui Masato
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1 Pages: 17954-17954

    • DOI

      10.1038/s41598-018-36264-9

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Integrated treatment using intraperitoneal radioimmunotherapy and positron emission tomography-guided surgery with <sup>64</sup>Cu-labeled cetuximab to treat early- and late-phase peritoneal dissemination in human gastrointestinal cancer xenografts2018

    • Author(s)
      Yoshii Yukie、Yoshimoto Mitsuyoshi、Matsumoto Hiroki、Tashima Hideaki、Iwao Yuma、Takuwa Hiroyuki、Yoshida Eiji、Wakizaka Hidekatsu、Yamaya Taiga、Zhang Ming-Rong、Sugyo Aya、Hanadate Sayaka、Tsuji Atsushi B.、Higashi Tatsuya
    • Journal Title

      Oncotarget

      Volume: 9 Issue: 48 Pages: 28935-28950

    • DOI

      10.18632/oncotarget.25649

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Water Diffusion in the Brain of Chronic Hypoperfusion Model Mice: A Study Considering the Effect of Blood Flow2018

    • Author(s)
      Urushihata Takuya、Takuwa Hiroyuki、 Seki Chie、 Tachibana Yasuhiko、Takahashi Manami、Jeff Kershaw、Takado Yuhei 、Aoki Ichio、Higuchi Makoto、Ito Hiroshi、Obata Takayuki
    • Journal Title

      Magnetic Resonance in Medical Sciences

      Volume: 17 Issue: 4 Pages: 318-324

    • DOI

      10.2463/mrms.mp.2017-0149

    • NAID

      130007496873

    • ISSN
      1347-3182, 1880-2206
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Imaging of Neuronal Activity in Awake Mice by Measurements of Flavoprotein Autofluorescence Corrected for Cerebral Blood Flow2018

    • Author(s)
      Takahashi Manami、Urushihata Takuya、Takuwa Hiroyuki、Sakata Kazumi、Takado Yuhei、Shimizu Eiji、Suhara Tetsuya、Higuchi Makoto、Ito Hiroshi
    • Journal Title

      Frontiers in Neuroscience

      Volume: 11 Pages: 723-723

    • DOI

      10.3389/fnins.2017.00723

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 新たに発見された「自浄」と「自傷」の脳内不要物排出メカニズムと認知症病態2020

    • Author(s)
      田桑 弘之
    • Organizer
      第37回日本認知症学会学術集会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 認知症の病原性タンパクを脳外に排出する免疫細胞の新たな役割2020

    • Author(s)
      田桑 弘之
    • Organizer
      第24 回Neurology SPECT 定量検討会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] In vivo multiscale imaging of glymphatic clearance of tau and alpha-synuclein from the brain2020

    • Author(s)
      Hiroyuki Takuwa
    • Organizer
      Neuro 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] In vivo multi-scale brain imaging with the Multiphoton Mesoscope2018

    • Author(s)
      田桑弘之
    • Organizer
      Neuro 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 脳の自浄システムとしてのアストロサイトとglymphaticシステム2018

    • Author(s)
      田桑弘之
    • Organizer
      日本認知症学会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Book] 実験医学 vol37 No62019

    • Author(s)
      樋口真人 田桑弘之
    • Total Pages
      6
    • Publisher
      羊土社
    • Related Report
      2019 Research-status Report
  • [Book] 比較生理生化学 vol37 no12019

    • Author(s)
      田桑弘之 加納正道
    • Total Pages
      9
    • Publisher
      日本比較生理生化学会
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] タウオパチーの治療剤2020

    • Inventor(s)
      Kazuaki Sampei et al
    • Industrial Property Rights Holder
      Kazuaki Sampei et al
    • Industrial Property Rights Type
      特許
    • Filing Date
      2020
    • Related Report
      2019 Research-status Report

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Published: 2018-04-23   Modified: 2023-03-16  

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