2021 Fiscal Year Final Research Report
Elevated type I interferon expression in dermatomyositis: involvement of LINE-1 and viral infection.
Project/Area Number |
19K08766
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 53050:Dermatology-related
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Research Institution | Kanazawa Medical University (2021) Gunma University (2019-2020) |
Principal Investigator |
SHIMIZU Akira 金沢医科大学, 医学部, 教授 (70396638)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | レトロトランスポゾン / LINE-1 / 皮膚筋炎 / インターフェロン |
Outline of Final Research Achievements |
RNA was extracted from peripheral leukaemic cells of patients with autoimmune diseases and analysed for gene expression of retrotransposons such as LINE-1, type I-III IFN, Janus kinase (JAK), signal transduction cum transcription activator (STAT) and IFN-induced genes (ISG). Type I IFN was elevated in peripheral leukaemic cells of patients undergoing treatment for dermatomyositis and autoimmune bullous disease. The correlation between the respective gene expression was analysed using the Spearman correlation coefficient, which confirmed a positive correlation between type I IFN and LINE-1 in both dermatomyositis, SLE and autoimmune blistering. Different patterns were observed for downstream JAK, STAT and ISG expression and correlations in each disease.
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Free Research Field |
皮膚科学
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Academic Significance and Societal Importance of the Research Achievements |
自己免疫疾患は自己抗体を産生する慢性炎症疾患である。標的臓器が多臓器に及ぶ全身性自己免疫疾患である全身性エリテマトーデス(SLE)や皮膚筋炎は有効な治療法が限られる難病であり、I型インターフェロン(IFN)が病態に関与するとされる。I型IFNは通常ウイルス感染に応答して産生されるが、代表的レトロトランスポゾンである長鎖散在反復配列(LINE-1)もI型IFN産生を誘導する。今回、皮膚筋炎、SLE、自己免疫水疱症などの自己免疫疾患においてLINE-1発現を起点としたI型IFNやその下流の経路が病態に関与する可能性を示した。
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