02Apr 2023
Anti‐Sp4 autoantibodies co‐occur with anti‐TIF1 and are associated with distinct clinical features and immunogenetic risk factors in juvenile myositis

Anti‐Sp4 autoantibodies co‐occur with anti‐TIF1 and are associated with distinct clinical features and immunogenetic risk factors in juvenile myositis

The study investigated the prevalence and clinical features of anti-Sp4 autoantibodies in juvenile-onset idiopathic inflammatory myopathies (IIM). The study found that anti-Sp4 autoantibodies were present in 7% of patients with juvenile myositis and predominantly in those with co-existing anti-TIF1 autoantibodies. Patients with anti-Sp4 autoantibodies represented a phenotypic subset of anti-TIF1 autoantibody-positive myositis characterized by frequent Raynaud's phenomenon and less pronounced muscle involvement. The study also identified novel immunogenetic risk factors for White patients with IIM who had anti-Sp4 autoantibodies.

  • #rheumatology

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