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2021 Fiscal Year Final Research Report

Elucidation of the pathogenesis of dermatomyositis-associated rapidly progressive interstitial lung disease, focusing on the expression of MDA5

Research Project

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Project/Area Number 20K17448
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 54020:Connective tissue disease and allergy-related
Research InstitutionKyoto Prefectural University of Medicine

Principal Investigator

Kida Takashi  京都府立医科大学, 医学(系)研究科(研究院), 特任助教 (20848501)

Project Period (FY) 2020-04-01 – 2022-03-31
KeywordsMDA5 / 皮膚筋炎 / 間質性肺炎 / 好中球
Outline of Final Research Achievements

Dermatomyositis with positive anti-melanoma differential gene 5 (MDA5) antibodies is frequently associated with rapid progressive interstitial lung disease (RP-ILD). To date, it has been unknown whether and how anti-MDA5 antibodies and their corresponding antigen, MDA5, are involved in the pathogenesis of RP-ILD. In this study, we elucidated that inflammatory neutrophils infiltrating into the lungs, triggered by various factors such as bacterial or viral infections, produce MDA5. Recognition of the produced MDA5 by anti-MDA5 antibodies may be involved in the pathogenesis of RP-ILD, and we are now conducting further investigations.

Free Research Field

膠原病学

Academic Significance and Societal Importance of the Research Achievements

Melanoma differential gene 5(MDA5)は細胞内に存在するウイルスセンサーであり、皮膚筋炎患者にみられる抗MDA5抗体の病的意義や、どのようにして急速進行性間質性肺疾患の発症に関与しているのかについてはわかっていなかった。
本研究では、炎症細胞におけるMDA5の産生により、細胞外にMDA5が抗原として提示されることで急速進行性間質性肺疾患の病態が形成されている可能性が示唆された。さらなる検証により、急速進行性間質性肺疾患の発症メカニズムの理解、新規治療標的の発見のみならず、トリガーとしての感染症への対策を含めた新たな発症予防戦略の提唱にもつながると考えられる。

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Published: 2023-01-30  

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