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Development of Noninvasive and Highly Sensitive Diagnostic Techniques for Inflammatory Myopathies

Research Project

Project/Area Number 22K07744
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionGifu University

Principal Investigator

Mizuno Nozomi  岐阜大学, 大学院医学系研究科, 招へい教員 (10509798)

Co-Investigator(Kenkyū-buntansha) 兵藤 文紀  岐阜大学, 大学院医学系研究科, 教授 (10380693)
江藤 比奈子  九州大学, 先端医療オープンイノベーションセンター, 特任助教 (30557632)
松尾 政之  岐阜大学, 大学院医学系研究科, 教授 (40377669)
Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2024: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords炎症 / 筋肉 / レドックス / 超核偏極 / MRI / 筋炎 / mdx / レドックスイメージング / DNP / ニトロキシルラジカル
Outline of Research at the Start

本研究では、DNP-MRIおよび炎症で産生される活性酸素との反応性を有するレドックス感受性DNP造影剤を用いた炎症性筋炎の高感度可視化法を開発し、筋炎モデルマウスでの本法の有用性を実証することを目的とする。

Outline of Final Research Achievements

In this study, we performed in vivo redox imaging using dynamic nuclear polarization MRI (DNP-MRI) to noninvasively evaluate the inflammatory state of skeletal muscle in mdx mice, a widely used model for Duchenne muscular dystrophy (DMD), one of the representative inflammatory diseases. Using the signal decay rate of the redox probe CmP, we analyzed the redox status of skeletal muscle in mdx mice. At all ages, the decay rate of CmP radicals was significantly faster in mdx mice compared to normal mice, suggesting the presence of a chronic inflammatory environment. Notably, increased ROS production and macrophage accumulation were found to promote the reduction of CmP radicals, indicating that DNP-MRI may serve as a valuable noninvasive method for assessing skeletal muscle inflammation in DMD.

Academic Significance and Societal Importance of the Research Achievements

デュシェンヌ型筋ジストロフィー(DMD)は小児期に発症し進行性に悪化する難治性筋疾患であり、早期診断と病態進行の評価が極めて重要である。本研究で開発・検証されたDNP-MRIによるレドックスイメージング技術は、筋組織の炎症状態を非侵襲かつ高感度に可視化できる新たな手法として、患者への負担を軽減しつつ、治療効果のモニタリングや新規治療法の評価に貢献する可能性がある。これは医療現場への応用が期待される社会的に意義の高い技術であるといえる。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (5 results)

All 2024 2022

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (2 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Evaluation of the redox alteration in Duchenne muscular dystrophy model mice using in vivo DNP-MRI2024

    • Author(s)
      Hinako Eto, Masaharu Murata, Takahito Kawano, Yoko Tachibana, Abdelazim Elsayed Elhelaly, Yoshifumi Noda, Hiroki Kato, Masayuki Matsuo & Fuminori Hyodo
    • Journal Title

      NPJ imaging

      Volume: 52 Pages: 2-2

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Continuous monitoring of postirradiation reoxygenation and cycling hypoxia using electron paramagnetic resonance imaging2022

    • Author(s)
      Kawai Tatsuya、Matsuo Masayuki、Takakusagi Yoichi、Saito Keita、Hyodo Fuminori、Devasahayam Nallathamby、Matsumoto Shingo、Kishimoto Shun、Yasui Hironobu、Yamamoto Kazutoshi、Krishna Murali C.
    • Journal Title

      NMR in Biomedicine

      Volume: 35 Issue: 10 Pages: 4783-4783

    • DOI

      10.1002/nbm.4783

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Noninvasive Diagnosis of the Mitochondrial Function of Doxorubicin-Induced Cardiomyopathy Using In Vivo Dynamic Nuclear Polarization?Magnetic Resonance Imaging2022

    • Author(s)
      Mizuta Yukie、Akahoshi Tomohiko、Eto Hinako、Hyodo Fuminori、Murata Masaharu、Tokuda Kentaro、Eto Masatoshi、Yamaura Ken
    • Journal Title

      Antioxidants

      Volume: 11 Issue: 8 Pages: 1454-1454

    • DOI

      10.3390/antiox11081454

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Imaging tissue metabolism using dynamic nuclear polarization (DNP) MRI2022

    • Author(s)
      Fuminori Hyodo, Masayuki Matsuo
    • Organizer
      Asia-Pacific EPR/ESR Symposium 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of low filed dynamic nuclear polarization (DNP)-MRI for large animals and imaging oxidative stress on acute hepatitis rats2022

    • Author(s)
      Fuminori Hyodo, Hinako Eto, Tatsuya Naganuma, Abdelazim Elsayed Elhelaly, Masaharu Murata, Yoshifumi Noda, Hiroki Kato, Masayuki Matsuo
    • Organizer
      第50回日本磁気共鳴医学会大会
    • Related Report
      2022 Research-status Report

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Published: 2022-04-19   Modified: 2026-01-16  

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