Serum level of interleukin-15 in active alopecia areata patients and its relation to age, sex, and disease severity.

Introduction: Autoimmune mechanisms with evident genetic background are the main components of alopecia areata (AA) pathogenesis. Interleukin 15 (IL-15) is considered as an important signalling cytokine. Its disordered expression has been linked to inflammatory autoimmune disorders.