• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of early diagnostic method using Alzheimer's disease model mice

Research Project

Project/Area Number 20K07829
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52010:General internal medicine-related
Research InstitutionHealth Sciences University of Hokkaido

Principal Investigator

FUJII Hirotada  北海道医療大学, その他, 客員教授 (70209013)

Co-Investigator(Kenkyū-buntansha) 下濱 俊  札幌医科大学, 医学部, 名誉教授 (60235687)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsアルツハイマー病 / 酸化ストレス / レドックス / EPRイメージング / 脳内レドクス / 電子常磁性共鳴 / イメージング / モデルマウス / 酸素代謝
Outline of Research at the Start

高齢化に伴い、アルツハイマー病(AD)の発症メカニズムの解明から診断・治療に渡る包括的な研究推進が求められている。AD病態を理解するにはADの生理学的情報を可視化する手法の開発が重要であり、特にADの発症予測が可能な非侵襲的イメージング技術の出現が求められている。本研究では、酸化ストレス状態がAD病理カスケードの早期段階で変化する点に着目し、ADモデルマウスの脳内酸化ストレス関連パラメーターを非侵襲で可視化する電子常磁性共鳴法を用いたAD病態の早期診断システムを開発する。本システムを用い、AD発症予測と病態進行度の客観的評価を可能とする評価手法を確立し、早期診断ツールとしての貢献をめざす。

Outline of Final Research Achievements

Alzheimer's disease (AD) is the most common neurodegenerative disease causing progressive cognitive decline. One of the histopathological hallmarks of AD is aggregated amyloid-β (Aβ) proteins. In addition to the typical pathological changes of AD, oxidative stress is also reported to be an important pathological phenomenon that starts to manifest early in the course of AD. Oxidative stress induced by the generation of reactive oxygen species (ROS) is a prominent phenomenon in AD and is known to occur early in its course. In the present study, we developed a newly designed digital electron paramagnetic resonance (EPR) imager with redox-sensitive piperidine nitroxide probe for early detection of changed brain redox status. Using this system, the obtained brain redox images of AD and control mice clearly showed impaired brain redox status of AD mice compared to control, and this change was apparently seen in 7-month-old AD mice compared with age-matched control mice.

Academic Significance and Societal Importance of the Research Achievements

本研究課題では、ADモデルマウスの脳内レドックス状態を非侵襲で可視化しうる、電子常磁性共鳴法(EPR)を用いたAD病態の早期診断システムを開発した。本研究で開発したシステムを用いると、ADモデルマウスの脳内にアミロイドβタンパク質が蓄積し始める9ヶ月例よりも早い6~7ヶ月齢で脳内酸化ストレス状態が変化することを検出することが出来た。 この研究手法を活用すると、ADモデルマウスにどのような介入をすることでいち早く脳内レドックス状態の変動が起こりうるかを予測することが出来、ADの始まりの状態である軽度認知障害(MCI)への移行を早期に発見でき、AD患者増加の抑制に貢献することが出来る。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2021 2020

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

  • [Journal Article] Effect of relative configuration of TEMPO-type nitroxides on ascorbate reduction2023

    • Author(s)
      Azuma Risa、Yamasaki Toshihide、Emoto Miho C.、Sato-Akaba Hideo、Sano Kohei、Munekane Masayuki、Fujii Hirotada G.、Mukai Takahiro
    • Journal Title

      Free Radical Biology and Medicine

      Volume: 194 Pages: 114-122

    • DOI

      10.1016/j.freeradbiomed.2022.11.033

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Early detection of redox imbalance in the APPswe/PS1dE9 mouse model of Alzheimer’s disease by in vivo electron paramagnetic resonance imaging2021

    • Author(s)
      Emoto Miho C.、Sato-Akaba Hideo、Hamaue Naoya、Kawanishi Katsuya、Koshino Hisashi、Shimohama Shun、Fujii Hirotada G.
    • Journal Title

      Free Radical Biology and Medicine

      Volume: 172 Pages: 9-18

    • DOI

      10.1016/j.freeradbiomed.2021.05.035

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Three-dimensional electron paramagnetic resonance imaging of mice using ascorbic acid sensitive nitroxide imaging probes2021

    • Author(s)
      Sato-Akaba Hideo、Emoto Miho C.、Yamada Ken-ichi、Koshino Hisashi、Fujii Hirotada G.
    • Journal Title

      Free Radical Research

      Volume: 55 Issue: 9-10 Pages: 950-957

    • DOI

      10.1080/10715762.2021.1991918

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Design and Fabrication of Compact Arrayed Magnet for Biological EPR Imaging2020

    • Author(s)
      Sato-Akaba Hideo、Okada Yuki、Tsuji Kentaro、Emoto Miho C.、Fujii Hirotada G.
    • Journal Title

      Applied Magnetic Resonance

      Volume: - Issue: 8 Pages: 1-13

    • DOI

      10.1007/s00723-020-01256-4

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Brain redox imaging using the blood-brain barrier-permeable nitroxides with different resistances to esterase.2022

    • Author(s)
      Emoto M, Sato-Akaba H, Fujii H.
    • Organizer
      ISMRM
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 卓上型EPRイメージング装置によるマウス胸腹部の三次元画像2022

    • Author(s)
      江本美穂、赤羽英夫、藤井博匡
    • Organizer
      第61回電子スピンサイエンス学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Brain imaging of small animals by compact bench-top EPR imager2021

    • Author(s)
      Fujii Hirotada G、Sato-Akaba Hideo、Emoto Miho C.
    • Organizer
      International Society of Magnetic Resonance Conference
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi