Abstract

Dermatomyositis (DM) is a complex and rare autoimmune disease characterized by muscle weakness and distinctive skin rashes. Its pathogenesis involves a combination of genetic susceptibility, environmental triggers, and immunological factors, with interferon pathways and specific gene upregulations playing crucial roles. Diagnosis is based on clinical presentation, laboratory findings, and imaging, with particular emphasis on myositis-specific antibodies and characteristic muscle and skin changes. The clinical heterogeneity of DM, including variants such as clinically amyopathic DM and DM-associated interstitial lung disease, necessitates a personalized diagnostic and therapeutic approach. Current pharmacological treatments for DM include glucocorticoids, which remain the first-line therapy despite their long-term adverse effects. Immunosuppressants, such as azathioprine, methotrexate, and mycophenolate mofetil, are commonly used in combination with glucocorticoids to enhance efficacy and reduce steroid dependence. Biologics, such as rituximab and intravenous immunoglobulin, have shown effectiveness in refractory cases. Emerging therapies, particularly Janus kinase inhibitors, offer promise for treatment-resistant DM, although they present significant safety concerns, including increased risks of infections and cardiovascular events. Despite significant advancements, managing DM remains challenging due to its rarity and variability. Future research should prioritize the development of precision medicine approaches tailored to individual genetic and pathological features. Additionally, integrated treatment strategies combining pharmacological and non-pharmacological interventions are crucial to improving patient outcomes and quality of life. Understanding the etiology and pathogenesis of DM more deeply will be vital for developing more effective and targeted treatments, ultimately leading to better disease management and prognosis.

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