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The role of Alzheimer's disease risk factor PICALM on the propagation of Tau aggregates

Research Project

Project/Area Number 17K15606
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field General medical chemistry
Research InstitutionJuntendo University

Principal Investigator

Shimonaka Shotaro  順天堂大学, 医学(系)研究科(研究院), 特任助教 (90778747)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsAlzheimer病 / Tau / Tauopathy / タンパク凝集 / Tau strain / Aggregation / Seed / PICALM / 異常凝集 / 伝播 / アルツハイマー病
Outline of Final Research Achievements

In this study, initially we have analyzed the molecular relationship between cell-to-cell propagation of tau aggregates and PICALM using tau/PICALM co-expression cellular model. During the series of experiments, unexpectedly we found that 353-368 aa sequence of tau is specifically involved in the AD-tau seeded tau aggregation. Subsequently, we tried to narrowing-down the important sites within 353-368 aa sequence and verified the AD-tau specificity using tau from other tauopathy cases. Finally, we found that Asparagine 368 residue of tau plays important role on the formation of AD-tau specific fibril core structure.

Academic Significance and Societal Importance of the Research Achievements

Tauタンパクの蓄積を特徴とするtauopathyにおいて、tauの蓄積する部位や凝集tauの取る高次構造などに疾患ごとの差異があり、その分子病態については十分理解されていない。本研究ではAsn368という特定のアミノ酸の側鎖の構造が僅かに変わるだけで、AD-typeのtau凝集のみが選択的に阻害されることを示した。このアミノ酸のtau凝集における分子動態を解析することで、疾患ごとのtauの違いに関する新たな知見の獲得が期待される。また、本研究で見出した、AD-tau特異的な変異を応用することで、tauopathyの分子病型診断法の開発に繋げることも考えられる。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2021 2020 2019 2018 2017

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Learning Deficits Accompanied by Microglial Proliferation After the Long-Term Post-Injection of Alzheimer’s Disease Brain Extract in Mouse Brains2021

    • Author(s)
      Tetsuo Hayashi, Shotaro Shimonaka, Montasir Elahia, Shin-Ei Matsumoto, Koichi Ishiguro, Masashi Takanashi, Nobutaka Hattori and Yumiko Motoi
    • Journal Title

      Journal of Alzheimer’s Disease

      Volume: 79 Issue: 4 Pages: 1701-1711

    • DOI

      10.3233/jad-201002

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Strain-specific clearance of seed-dependent tau aggregation by lithium-induced autophagy2021

    • Author(s)
      Mohammad Nasir Uddin , Montasir Elahi, Shotaro Shimonaka, Soichiro Kakuta, Koichi Ishiguro, Yumiko Motoi, Nobutaka Hattori
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 543 Pages: 65-71

    • DOI

      10.1016/j.bbrc.2020.12.113

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Asparagine residue 368 is involved in Alzheimer's disease tau strain specific aggregation2020

    • Author(s)
      Shimonaka Shotaro、Matsumoto Shin-Ei、Elahi Montasir、Ishiguro Koichi、Hasegawa Masato、Hattori Nobutaka、Motoi Yumiko
    • Journal Title

      Journal of Biological Chemistry

      Volume: 295 Issue: 41 Pages: 13996-14014

    • DOI

      10.1074/jbc.ra120.013271

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Astrocytic 3-Repeat Tau Pathologies in Progressive Supranuclear Palsy2020

    • Author(s)
      Taniguchi Daisuke、Takanashi Masashi、Hatano Taku、Kishikawa Satsuki、Shimonaka Shotaro、Motoi Yumiko、Yao Takashi、Hattori Nobutaka
    • Journal Title

      Journal of Neuropathology & Experimental Neurology

      Volume: 79 Issue: 9 Pages: 1015-1018

    • DOI

      10.1093/jnen/nlaa073

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Asparagine residue 368 is involved in Alzheimer’s disease tau strain-specific aggregation2020

    • Author(s)
      Shotaro Shimonaka, Montasir Elahi, Shin-Ei Matsumoto, Koichi Ishiguro, Masato Hasegawa, Nobutaka Hattori, Yumiko Motoi
    • Organizer
      Alzheimer’s Association International Conference 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] TauのAsn368変異はアルツハイマー病由来seedによる凝集のみを低下させる2019

    • Author(s)
      下中 翔太郎、Elahi Montasir、松本 信英、石黒 幸一、本井 ゆみ子、服部 信孝
    • Organizer
      第38回日本認知症学会学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] TauのC末端領域における凝集責任配列の同定とその性質の解析2018

    • Author(s)
      下中 翔太郎、松本 信英、本井 ゆみ子、服部 信孝
    • Organizer
      第37回日本認知症学会学術集会
    • Related Report
      2018 Research-status Report
  • [Presentation] The Identification of the Tau C-terminal Sequences Involved in Aggregates Formation.2018

    • Author(s)
      Shotaro Shimonaka, Shin-ei Matsumoto, Yumiko Motoi, Nobutaka Hattori
    • Organizer
      Society for Neuroscience 2018 annual meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Tauopathy培養細胞モデルを用いたTauの凝集・伝播に関わるアミノ酸配列の同定2017

    • Author(s)
      下中 翔太郎、松本 信英、本井 ゆみ子、服部 信孝
    • Organizer
      第36回日本認知症学会学術集会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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