{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T17:52:46Z","timestamp":1790790766068,"version":"4.1.0"},"reference-count":32,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2025,2,6]],"date-time":"2025-02-06T00:00:00Z","timestamp":1738800000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Clinics and Practice"],"abstract":"<jats:p>Background\/Objectives: Dermatomyositis (DM) is a rare idiopathic inflammatory myopathy characterized by muscle weakness and typical cutaneous rash. Dermatomyositis-specific antibodies, such as anti-TIF1\u03b3, anti-SAE, anti-Mi2, anti-MDA5, and anti-NXP2, have been associated with specific clinical phenotypes. Our study aimed to describe the clinical profile of Moroccan patients with DM and clinical associations with myositis-specific antibodies. Methods: We recruited 54 adult patients with DM according to the Bohan and Peter criteria, admitted to the internal medicine and dermatology departments of the University Hospital Center Ibn Rochd of Casablanca from January 2020 to December 2023. Testing for myositis-specific autoantibodies (MSAs) was conducted using an Immunodot assay. Statistical analysis was performed using the Chi-square test. Results: Among our patients, 74% were female. The mean age of the patients at the time of diagnosis was 45.8 years (\u00b112.95 years). The main clinical manifestations were a V-neck sign (70.4%), myalgia (70.4%), Gottron\u2019s papules (68.5%), heliotrope rash (63%), arthritis\/arthralgia (48.1%), proximal muscle weakness (68.5%), periungual erythema (46.3%), and dysphagia (59.3%). Of the 54 patients, 37 (68.5%) showed dermatomyositis-specific antibody positivity. The most frequently found autoantibody was anti-Mi2 (22.2%), followed by anti-TIF1\u03b3 (14.8%), anti-NXP2 (9.2%), anti-MDA5 (7.4%), and anti-SAE (7.4%). The association between clinical manifestations and MSAs showed that anti-TIF1\u03b3 antibodies were associated with the V-neck sign (p &lt; 0.05), and the MSA-negative group was protected from periungual erythema (p &lt; 0.05). No other significant association was found. Conclusions: This study shows the autoantibody profile of Moroccan patients with DM and the associations of MSAs with clinical manifestations.<\/jats:p>","DOI":"10.3390\/clinpract15020031","type":"journal-article","created":{"date-parts":[[2025,2,6]],"date-time":"2025-02-06T06:30:29Z","timestamp":1738823429000},"page":"31","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Clinical Features of Dermatomyositis Associated with Myositis-Specific Antibodies in Moroccan Patients"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-4673-7482","authenticated-orcid":false,"given":"Milouda","family":"Chihi","sequence":"first","affiliation":[{"name":"Laboratory of Inflammation Clinical Immunology and Allergy(LICIA), Faculty of Medicine and Pharmacy of Casablanca, Hassan II University, Casablanca 20250, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-8759-8424","authenticated-orcid":false,"given":"Leila","family":"Barakat","sequence":"additional","affiliation":[{"name":"Internal Medicine Department, Ibn Rochd University Hospital, Casablanca 20100, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fatima Zahra","family":"Benhayoun","sequence":"additional","affiliation":[{"name":"Dermatology Department, Ibn Rochd University Hospital, Casablanca 20100, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5715-6300","authenticated-orcid":false,"given":"Abire","family":"Allaoui","sequence":"additional","affiliation":[{"name":"Laboratory of Inflammation Clinical Immunology and Allergy(LICIA), Faculty of Medicine and Pharmacy of Casablanca, Hassan II University, Casablanca 20250, Morocco"},{"name":"Internal Medicine Department, Cheikh Khalifa International University Hospital, Casablanca 82403, Morocco"},{"name":"Immunopathology-Immunomonitoring-Immunotherapy Laboratory, Mohammed VI University of Health and Sciences (UM6SS), Casablanca 82403, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Samy","family":"Housbane","sequence":"additional","affiliation":[{"name":"Medical Informatics Laboratory, Faculty of Medicine and Pharmacyof Casablanca, Hassan II University, Casablanca 20250, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mina","family":"Moudatir","sequence":"additional","affiliation":[{"name":"Laboratory of Inflammation Clinical Immunology and Allergy(LICIA), Faculty of Medicine and Pharmacy of Casablanca, Hassan II University, Casablanca 20250, Morocco"},{"name":"Internal Medicine Department, Ibn Rochd University Hospital, Casablanca 20100, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fouzia","family":"Hali","sequence":"additional","affiliation":[{"name":"Dermatology Department, Ibn Rochd University Hospital, Casablanca 20100, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ahmed Aziz","family":"Bousfiha","sequence":"additional","affiliation":[{"name":"Laboratory of Inflammation Clinical Immunology and Allergy(LICIA), Faculty of Medicine and Pharmacy of Casablanca, Hassan II University, Casablanca 20250, Morocco"},{"name":"Department of Pediatric Infectious Diseases and Clinical Immunology, Abderrahim Harouchi Mother-Child Hospital, Ibn Rochd University Hospital, Casablanca 20100, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jalila","family":"El Bakkouri","sequence":"additional","affiliation":[{"name":"Laboratory of Inflammation Clinical Immunology and Allergy(LICIA), Faculty of Medicine and Pharmacy of Casablanca, Hassan II University, Casablanca 20250, Morocco"},{"name":"Immunopathology-Immunomonitoring-Immunotherapy Laboratory, Mohammed VI University of Health and Sciences (UM6SS), Casablanca 82403, Morocco"},{"name":"Laboratory of Immunology, Ibn Rochd University Hospital, Casablanca 20100, Morocco"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,2,6]]},"reference":[{"key":"ref_1","first-page":"18","article-title":"Dermatomyositis: New antibody, new classification","volume":"35","author":"Bolko","year":"2019","journal-title":"Med. 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