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Development of novel ligands for in vivo imaging of amyloid oligomers in the brain of Alzheimer's disease

Research Project

Project/Area Number 19K12780
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionShiga University of Medical Science

Principal Investigator

Taguchi Hiroyasu  滋賀医科大学, 神経難病研究センター, 特任教授 (90102912)

Co-Investigator(Kenkyū-buntansha) 柳沢 大治郎  滋賀医科大学, 神経難病研究センター, 准教授 (50581112)
加藤 智子  滋賀医科大学, 神経難病研究センター, 特任助教 (90754367)
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: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords認知症 / MRI / 画像診断 / 有機合成 / アミロイドβオリゴマー / フッ素MRI / 治療薬 / アルツハイマー病 / 画像診断法 / Aβオリゴマー / 有機合成成 / 認知用 / 核磁気共鳴画像
Outline of Research at the Start

本研究の目的は、”ケト型のShiga-YはAβオリゴマーに結合する”という仮説をもとに世界初となるAβオリゴマーの画像化試薬を開発することである。この目的を達成するために以下のように研究をすすめる。
1)Aβオリゴマーに特異的に結合する候補化合物の合成
2)水晶発振子マイクロバランス(QCM)測定装置で特異性の確認
3)モデルマウスの組織を用いた結合試験
4)アルツハイマー病モデルマウスを用いたin vivo画像化実験
1)から3)にて最適な化合物を選択後、モデルマウスおよび野生型マウスの尾静脈から化合物を投与し、7テスラMRIでAβオリゴマーの画像化に挑戦する。

Outline of Final Research Achievements

Aβ oligomers serve as an important role in early stage of AD pathology. The present study developed Shiga-Y51 as a fluorine-19 MR imaging probe for detecting Aβ oligomers. Wild-type and AD model mice that displayed accumulation of Aβ oligomers in the brain were subjected to MS imaging and MR measurements after the injection with Shiga-Y51. MS imaging revealed the accumulation of Shiga-Y51 in the brain where Aβ oligomers accumulated in AD model mice. Furthermore, Shiga-Y51-injected AD model mice showed significant fluorine MR signals in the brain, compared with wild-type mice. These results suggest that the current study succeeded in the first MR imaging of Aβ oligomers.

Academic Significance and Societal Importance of the Research Achievements

ADは発症後の治療が困難であることから,Aβオリゴマーが蓄積し始める40-50代での正確な診断法の確立と治療法の開発が急務である。そこで、Aβオリゴマーを標的にした診断・治療薬の開発が試みられているものの、実用化されたものはない。本研究では、Aβオリゴマーのフッ素MR画像化試薬を開発し、その有用性をin vivoで検証することで、世界初となるAβオリゴマーのフッ素MR画像化に成功した。他に類を見ない画期的な研究成果であることから、学術的に非常に意義がある。

Report

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

    (10 results)

All 2022 2021 2020 2019 Other

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (3 results) (of which Int'l Joint Research: 1 results) Remarks (1 results) Patent(Industrial Property Rights) (1 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] A Fluorine-19 Magnetic Resonance Probe, Shiga-Y5, Downregulates Thioredoxin-Interacting Protein Expression in the Brain of a Mouse Model of Alzheimer’s Disease2021

    • Author(s)
      Pahrudin Arrozi Aslina、Abu Bakar Zulzikry Hafiz、Taguchi Hiroyasu、Yanagisawa Daijiro、Tooyama Ikuo
    • Journal Title

      Molecules

      Volume: 26 Issue: 17 Pages: 5342-5342

    • DOI

      10.3390/molecules26175342

    • NAID

      120007147812

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Keto form of curcumin derivatives strongly binds to Aβ oligomers but not fibrils2021

    • Author(s)
      Yanagisawa D, Kato T, Taguchi H, Shirai N, Hirao K, Sogabe T, Tomiyama T, Gamo K, Hirahara Y, Kitada M, Tooyama I
    • Journal Title

      Biomaterials

      Volume: 270 Pages: 120686-120686

    • DOI

      10.1016/j.biomaterials.2021.120686

    • NAID

      120006959909

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fluorine-19 Magnetic Resonance Imaging for Detection of Amyloid β Oligomers Using a Keto Form of Curcumin Derivative in a Mouse Model of Alzheimer’s Disease2021

    • Author(s)
      Yanagisawa Daijiro、Ibrahim Nor Faeizah、Taguchi Hiroyasu、Morikawa Shigehiro、Tomiyama Takami、Tooyama Ikuo
    • Journal Title

      Molecules

      Volume: 26 Issue: 5 Pages: 1362-1362

    • DOI

      10.3390/molecules26051362

    • NAID

      120007028249

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Novel fluorinated derivative of curcumin negatively regulates thioredoxin-interacting protein expression in retinal pigment epithelial and macrophage cells2020

    • Author(s)
      Buyandelger Undral、Walker Douglas Gordon、Taguchi Hiroyasu、Yanagisawa Daijiro、Tooyama Ikuo
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 532 Issue: 4 Pages: 668-674

    • DOI

      10.1016/j.bbrc.2020.08.114

    • NAID

      120006887065

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] フッ素MRIによるアミロイドβ・タウ病理の画像化研究2021

    • Author(s)
      柳沢大治郎, 田口弘康, 遠山育夫
    • Organizer
      第40回日本認知症学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Therapeutic effects of a curcumin derivative Shiga-Y5 in the brain of a mouse model of Alzheimer’s disease2019

    • Author(s)
      柳沢大治郎、田口弘康、遠山育夫
    • Organizer
      The 13th Japan-China Joint Seminar on Histochemistry and Cytochemistry
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] タウ遺伝子改変マウスrTg4510のタウ蓄積における遺伝的背景の影響2019

    • Author(s)
      柳沢大治郎、Hamizah Shahirah Hamezah、Aslina Pahrudin Arrozi、田口弘康、遠山育夫
    • Organizer
      第42回日本神経科学大会
    • Related Report
      2019 Research-status Report
  • [Remarks] ケト型のクルクミン誘導体はAβオリゴマーに結合するがフィブリルには結合しない

    • URL

      https://www.shiga-med.ac.jp/research-and-collaboration/priority-projects-and-research-results/latest-research-papers#20210225

    • Related Report
      2020 Research-status Report
  • [Patent(Industrial Property Rights)] アミロイドオリゴマーの画像診断薬2020

    • Inventor(s)
      遠山育夫、田口弘康、柳沢大治郎、加藤智子
    • Industrial Property Rights Holder
      遠山育夫、田口弘康、柳沢大治郎、加藤智子
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2020-033405
    • Filing Date
      2020
    • Related Report
      2019 Research-status Report

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

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