Topical JAK Inhibitors for the Treatment of Alopecia Areata and Vitiligo

Purpose of Review Alopecia areata (AA) and vitiligo are dermatological autoimmune diseases that, until recently, have had no specifically targeted therapies. Here, we review the future of therapies specifically targeted to the treatment of alopecia areata and vitiligo, both of which have JAK-STAT signaling implicated in their pathogenesis. Recent Findings With a greater understanding of disease mechanisms and pathogenesis, we are now able to target the immune dysfunction in autoimmune diseases with more precision than topical corticosteroids and calcineurin inhibitors. Inhibition of the JAK-STAT pathway has been shown to be effective in the treatment of AA, vitiligo, and in some patients with both diseases. Summary In this review, we summarize the current molecular and immunological understanding of AA and vitiligo, how JAK inhibition is increasingly positioned as a new therapy for autoimmune diseases, and the future of topical JAK inhibitors in the field of dermatology.