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Microscopic analysis of amyloid beta oligomers to elucidate the function of candidate medicinal agents for Alzheimer's disease

Research Project

Project/Area Number 19K05207
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 28030:Nanomaterials-related
Research InstitutionShiga University of Medical Science

Principal Investigator

Naruse Nobuyasu  滋賀医科大学, 医学部, 准教授 (30350408)

Co-Investigator(Kenkyū-buntansha) 田口 弘康  滋賀医科大学, 神経難病研究センター, 特任教授 (90102912)
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: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsアミロイドβ / オリゴマー / 走査プローブ顕微鏡 / 統計解析 / クルクミン / クルクミン誘導体 / 原子間力顕微鏡 / エタノール / 電気泳動 / ヒストグラム / アルツハイマー病 / 走査トンネル顕微鏡 / 電気泳動法 / 走査型プローブ顕微鏡 / アミロイドイメージング / ナノバイオ材料
Outline of Research at the Start

アミロイドβタンパク(Aβ)が凝集した多量体(オリゴマー)は、神経細胞毒性をもつことからアルツハイマー病(AD)に深く関連すると考えられ、その構造や凝集メカニズムが注目されている。しかし、Aβオリゴマーの構造は十分に理解されているとは言えない。本研究では、各種極微顕微鏡を駆使して、1nm以下の分解能でAβオリゴマーを直接観察するための方法論を確立する。さらに、これをベースに、自ら有機合成したMRI用Aβイメージング物質が、Aβと1)どの位置に結合し、2)なぜ結合できるのかを、イメージング物質の添加前後のAβオリゴマーの構造変化と可視-近赤外光照射時の応答、の両面から分析し薬剤開発の一助とする。

Outline of Final Research Achievements

Using electrophoresis experiments and atomic force microscopy (AFM), a typical nanoscale real-space observation method, we established a homogeneous incubation method for amyloid β-peptide (Aβ) pentamer.
Statistical analysis of the interaction of curcumin and its derivatives with the pentamer, focusing on the height of the pentamer observed in AFM images, showed that curcumin disasembly the pentamer to monomers, while some curcumin derivatives did not. This difference can be attributed to the keto-enol tautomerism of curcumin.

Academic Significance and Societal Importance of the Research Achievements

クルクミンは、Aβの5量体を直接モノマーにまで分解するという証拠を実空間観察手法と電気泳動実験で示した点と、クルクミン誘導体の一部で5量体の分解が起こらないことを見出した。これらの結果は、5量体の分解にクルクミンの互変異性が関連しうることを意味しており、大きな成果である。この成果は、今後のアルツハイマー病の初期に患者の脳に形成されると想定されているAβのオリゴマーを分解するには、ケト・エノール互変異性を有する化合物が有用であることを示しており、予防薬開発に繋がりうる成果と言える。

Report

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

    (8 results)

All 2022 2021 2020 2019

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 6 results)

  • [Journal Article] The Effect of Ethanol on Disassembly of Amyloid-β1-42 Pentamer Revealed by Atomic Force Microscopy and Gel Electrophoresis2022

    • Author(s)
      Matsui Atsuya、Bellier Jean-Pierre、Kanai Takeshi、Satooka Hiroki、Nakanishi Akio、Terada Tsukasa、Ishibe Takafumi、Nakamura Yoshiaki、Taguchi Hiroyasu、Naruse Nobuyasu、Mera Yutaka
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 23 Issue: 2 Pages: 889-889

    • DOI

      10.3390/ijms23020889

    • NAID

      120007186917

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Oligomers imaging of amyloid-β 1-42 by scanning tunneling microscopy2019

    • Author(s)
      Naruse Nobuyasu、Satooka Hiroki、Todo Kagefumi、Nakanishi Akio、Taguchi Hiroyasu、Mera Yutaka
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SI Pages: SIIB30-SIIB30

    • DOI

      10.7567/1347-4065/ab203b

    • NAID

      210000156784

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Amyloid-β Oligomer Transition Evaluated through Electrophoresis and Atomic Force Microscopy with Histogram Analysis2022

    • Author(s)
      Atsuya Matsui, Jean-Pierre Bellier, Hiroyasu Taguchi, Nobuyasu Naruse, and Yutaka Mera
    • Organizer
      The 22nd International Vacuum Congress (IVC-22)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Structural Characterization of Amyloid β(1-42) Oligomers on HOPG by Scanning Probe Microscopy2022

    • Author(s)
      Kotaro Fujii, Atsuya Matsui, Nobuyasu Naruse, Yutaka Mera
    • Organizer
      The 22nd International Vacuum Congress (IVC-22)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Curcuminoids-induced Amyloid-β disassembly assessed by electrophoresis and AFM2021

    • Author(s)
      A. Matsui, J. P. Bellier, H. Taguchi, N. Naruse and Y. Mera
    • Organizer
      29th International Colloquium on Scanning Probe Microscopy (ICSPM29)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-resolution imaging of small peptides on HOPG using scanning tunneling microscopy2021

    • Author(s)
      Kotaro Fujii, Yohei Shinohara, Atsuya Matsui, Nobuyasu Naruse, Yutaka Mera
    • Organizer
      The 9th International Symposium on Surface Science (ISSS9)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Threshold Concentration of Alcohol Affecting Amyloid-β1-42 Oligomeric Structures2020

    • Author(s)
      A. Matsui , H. Satooka , H. Taguchi , N. Naruse , Y. Mera
    • Organizer
      International Colloquium on Scanning Probe Microscopy (ICSPM28)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effect of Curcuminoid on Structure of Amyloid-β1-42 Oligomers2019

    • Author(s)
      T. Kanai, H. Taguchi, N. Naruse and Y. Mera
    • Organizer
      27th International Colloquium on Scanning Probe Microscopy (ICSPM27)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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

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