PMID- 35200123 OWN - NLM STAT- MEDLINE DCOM- 20220301 LR - 20240111 IS - 0392-856X (Print) IS - 0392-856X (Linking) VI - 40 IP - 2 DP - 2022 Feb TI - Clinical spectrum time course in non-Asian patients positive for anti-MDA5 antibodies. PG - 274-283 LID - 10.55563/clinexprheumatol/di1083 [doi] AB - OBJECTIVES: To define the clinical spectrum time-course and prognosis of non-Asian patients positive for anti-MDA5 antibodies. METHODS: We conducted a multicentre, international, retrospective cohort study. RESULTS: 149 anti-MDA5 positive patients (median onset age 53 years, median disease duration 18 months), mainly females (100, 67%), were included. Dermatomyositis (64, 43%) and amyopathic dermatomyositis (47, 31%), were the main diagnosis; 15 patients (10%) were classified as interstitial pneumonia with autoimmune features (IPAF) and 7 (5%) as rheumatoid arthritis. The main clinical findings observed were myositis (84, 56%), interstitial lung disease (ILD) (108, 78%), skin lesions (111, 74%), and arthritis (76, 51%). The onset of these manifestations was not concomitant in 74 cases (50%). Of note, 32 (21.5%) patients were admitted to the intensive care unit for rapidly progressive-ILD, which occurred in median 2 months from lung involvement detection, in the majority of cases (28, 19%) despite previous immunosuppressive treatment. One-third of patients (47, 32% each) was ANA and anti-ENA antibodies negative and a similar percentage was anti-Ro52 kDa antibodies positive. Non-specific interstitial pneumonia (65, 60%), organising pneumonia (23, 21%), and usual interstitial pneumonia-like pattern (14, 13%) were the main ILD patterns observed. Twenty-six patients died (17%), 19 (13%) had a rapidly progressive-ILD. CONCLUSIONS: The clinical spectrum of the anti-MDA5 antibodies-related disease is heterogeneous. 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CN - AENEAS collaborative group LA - eng PT - Journal Article PT - Multicenter Study DEP - 20220216 PL - Italy TA - Clin Exp Rheumatol JT - Clinical and experimental rheumatology JID - 8308521 RN - 0 (Autoantibodies) RN - EC 3.6.4.13 (Interferon-Induced Helicase, IFIH1) SB - IM MH - Autoantibodies MH - *Dermatomyositis/complications MH - Female MH - Humans MH - Interferon-Induced Helicase, IFIH1 MH - *Lung Diseases, Interstitial/drug therapy MH - Middle Aged MH - Prognosis MH - Retrospective Studies EDAT- 2022/02/25 06:00 MHDA- 2022/03/03 06:00 CRDT- 2022/02/24 12:19 PHST- 2021/08/21 00:00 [received] PHST- 2021/10/13 00:00 [accepted] PHST- 2022/02/25 06:00 [pubmed] PHST- 2022/03/03 06:00 [medline] PHST- 2022/02/24 12:19 [entrez] AID - 17797 [pii] AID - 10.55563/clinexprheumatol/di1083 [doi] PST - ppublish SO - Clin Exp Rheumatol. 2022 Feb;40(2):274-283. doi: 10.55563/clinexprheumatol/di1083. Epub 2022 Feb 16.