SERPINA12 in skin: molecular mechanisms and roles in adipocytes, psoriasis, and palmoplantar keratoderma.

SERPINA12 is a member of the serpin superfamily that has been extensively studied in metabolic and inflammatory disorders. In recent years, increasing evidence has highlighted its emerging role in skin physiology and dermatological diseases. SERPINA12 is expressed in multiple skin cell types, including keratinocytes and dermal fibroblasts, where it participates in the regulation of inflammation, cellular proliferation, differentiation, and tissue homeostasis. Dysregulation of SERPINA12 has been implicated in several skin disorders. In psoriasis, altered SERPINA12 expression is associated with chronic inflammation, immune dysregulation, and abnormal keratinocyte proliferation, suggesting a potential modulatory role in psoriatic pathogenesis. Furthermore, emerging studies suggest a possible involvement of SERPINA12 in palmoplantar keratoderma, where it may contribute to aberrant keratinization and epidermal barrier dysfunction. This review summarizes current knowledge on the expression patterns, biological functions, and molecular mechanisms of SERPINA12 in the skin, with a particular focus on adipocytes, psoriasis, and palmoplantar keratoderma. Understanding the role of SERPINA12 in cutaneous biology may provide new insights into disease pathogenesis and identify potential therapeutic targets for skin disorders.