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

Comprehensive analysis of complement and development of therapy against complement in myasthenia gravis

Research Project

Project/Area Number 19K17026
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52020:Neurology-related
Research InstitutionChiba University

Principal Investigator

Ozawa Yukiko  千葉大学, 医学部附属病院, 医員 (50792412)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords重症筋無力症 / 補体 / 補体調整因子
Outline of Research at the Start

重症筋無力症は自己抗体により末梢神経と筋肉のつなぎめである神経筋接合部の刺激伝達が障害され、筋力低下や易疲労性などが生じる自己免疫性疾患である。最近では、抗体を補助する免疫システム(補体系)がその発症機序に強く関与しているのではないかと言われている。本研究では治療前の血液の補体の値から重症筋無力症の免疫治療への反応効果や予後を予測することを目標としている。

Outline of Final Research Achievements

We investigated changes in serum complements and their regulators in the pathogenesis of myasthenia gravis (MG). Forty-four patients with acetylcholine receptor antibodies-positive MG, as well as 20 patients with noninflammatory neurological disorders were enrolled. Serum complements (C3, C4 and soluble C5b-9) and complement regulators (vitronectin, clusterin and properdin) were extensively analysed by ELISA and the associations with clinical profiles of MG were examined. Serum C3, C4 and clusterin levels were not significantly different between patients with MG and controls. The patients with MG showed higher soluble C5b-9 and vitronectin levels than the controls; moreover, vitronectin levels decreased after treatment. Serum properdin levels were lower in the patients with MG than in the controls, and negatively correlated with the MG activities of daily living score and with the presence of bulbar palsy.

Academic Significance and Societal Importance of the Research Achievements

MG患者では血清のsC5b9およびVitronectinが上昇しており、MGの長期的な予後や治療反応性を反映している可能性が示唆された。また血清のProperdinは低いほどMGの重症度が高い傾向にあり、MG重症度のバイオマーカーとなりうる可能性が示唆された。
現在補体をターゲットとした新規治療薬が次々と開発されており、全身型重症筋無力症において病態と関連した補体・補体調整因子は治療のバイオマーカーとなる可能性がある。

Report

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

    (3 results)

All 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (2 results)

  • [Journal Article] Changes in serum complements and their regulators in generalized myasthenia gravis2020

    • Author(s)
      Ozawa Y.、Uzawa A.、Yasuda M.、Kojima Y.、Oda F.、Himuro K.、Kawaguchi N.、Kuwabara S.
    • Journal Title

      European Journal of Neurology

      Volume: 28 Issue: 1 Pages: 314-322

    • DOI

      10.1111/ene.14500

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] 全身型重症筋無力症における補体ネットワークの変化2021

    • Author(s)
      小澤由希子
    • Organizer
      第62回日本神経学会学術大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 全身型重症筋無力症における補体と補体調整因子の動態2020

    • Author(s)
      小澤由希子
    • Organizer
      第61回日本神経学会学術大会
    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi