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Elucidation of the pathophysiology of systemic sclerosis targeting abnormal sodium metabolism

Research Project

Project/Area Number 21K08462
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54020:Connective tissue disease and allergy-related
Research InstitutionYokohama City University

Principal Investigator

Minegishi Kaoru  横浜市立大学, 附属病院, 助教 (40616877)

Co-Investigator(Kenkyū-buntansha) 中島 秀明  横浜市立大学, 医学研究科, 教授 (30217723)
桐野 洋平  横浜市立大学, 医学部, 講師 (50468154)
吉見 竜介  横浜市立大学, 医学部, 講師 (70585265)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywords全身性強皮症 / Na代謝 / Na-MRI / ナトリウム代謝
Outline of Research at the Start

電解質・体液の恒常性維持は生命維持において不可欠であり、中でもNa代謝は、脳・心血管・腎疾患など様々な疾患に直結するため、極めて重要である。生体内のNa調節は、これまで腎臓のみで行われていると考えられてきたが、近年、Naが皮膚、肝臓、筋肉など多臓器と連携して制御されていることが明らかとなり、Na代謝異常は様々な疾患をもたらすことが判明した。本研究の目的は、「皮膚に蓄積するNaが強皮症を進展・増悪させるメカニズムを解明し、この調整機構をターゲットとした新規治療法の開発を目指す」ことである。

Outline of Final Research Achievements

Systemic sclerosis is a rare, chronic autoimmune connective tissue disorder characterized by degenerative changes and scarring in the skin, lungs, and other internal organs against a background of autoimmune phenomena. It has been shown that localized Na accumulation in tissues, such as skin, due to excessive salt intake leads to increased autoimmune disease due to T cell polarization toward pathogenic Th17 cells via the p38/MAP kinase pathway. In this study, with the aim of “elucidating the mechanism by which Na accumulation in the skin causes the development and exacerbation of scleroderma,” (1) Na-MRI, which was developed as a tool to evaluate tissue Na levels, was “first introduced in Japan,” and (2) experiments focusing on Na in the skin were conducted using scleroderma model mice. The results suggested that Na accumulation may exacerbate skin fibrosis.

Academic Significance and Societal Importance of the Research Achievements

強皮症の病因としては、線維芽細胞の活性化、血管障害、免疫異常が知られている。皮膚硬化は浮腫期、硬化期、萎縮期という経過をとり、浮腫期であれば副腎皮質ホルモンの投与も検討されるが、治療効果は限定的であり、局所の電解質動態は今までに検証されていなかった。本研究に用いたNa-MRIの手法は、そのまま他の疾患への臨床応用も可能である。血清Na濃度は体内の総Na量の動きを示すものではない。Na-MRIは、画像診断対象外とされてきた疾患の異常を捉える可能性があり、こうした技術が進化すれば難治性疾患における治療薬の開発もいっそう進むと期待される。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (6 results)

All 2024 2023 2022 Other

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

  • [Int'l Joint Research] Duke-NUS Medical School(シンガポール)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Duke-NUS Medical School(シンガポール)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Water Conservation Overrides Osmotic Diuresis During SGLT2 Inhibition in Patients With Heart?Failure2024

    • Author(s)
      Marton Adriana, Saffari Seyed Ehsa, Rauh Manfred, Sun Ruo-Ning, Nagel Armin M., Linz Peter, Lim Tzy Tiing, Takase-Minegishi Kaoru, et al.
    • Journal Title

      Journal of the American College of Cardiology

      Volume: 83 Issue: 15 Pages: 1386-1398

    • DOI

      10.1016/j.jacc.2024.02.020

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Risk of Macrophage Activation Syndrome in Patients with Adult-Onset Still’s Disease Treated with IL-1 and IL-6 Inhibitors: A Meta-analysis and Single-Center Experience2023

    • Author(s)
      Adachi Soichiro, Takase-Minegishi Kaoru, Maeda Ayaka, Nagai Hideto, Horita Nobuyuki, Yoshimi Ryusuke, Kirino Yohei, Nakajima Hideaki
    • Journal Title

      Rheumatology and Therapy

      Volume: 10 Issue: 6 Pages: 1623-1636

    • DOI

      10.1007/s40744-023-00600-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Benefits and risks of haematopoietic stem cell transplantation for systemic sclerosis: A systematic review and meta-analysis2022

    • Author(s)
      Higashitani Kana、Takase-Minegishi Kaoru、Yoshimi Ryusuke、Kirino Yohei、Hamada Naoki、Nagai Hideto、Hagihara Maki、Matsumoto Kenji、Namkoong Ho、Horita Nobuyuki、Nakajima Hideaki
    • Journal Title

      Modern Rheumatology

      Volume: 33 Issue: 2 Pages: 330-337

    • DOI

      10.1093/mr/roac026

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 23Na-MRI:rethinking sodium balance concept in human.2022

    • Author(s)
      峯岸薫
    • Organizer
      第95回 日本生化学会大会
    • Related Report
      2022 Research-status Report
    • Invited

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Published: 2021-04-28   Modified: 2025-01-30  

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