Janus-kinase inhibitors in dermatology: A review of their use in psoriasis, vitiligo, systemic lupus erythematosus, hidradenitis suppurativa, dermatomyositis, lichen planus, lichen planopilaris, sarcoidosis and graft-versus-host disease.

Recent studies on molecular pathways have elucidated novel therapeutic approaches in inflammatory and autoimmune skin disorders. Specifically, the dysregulation of the Janus kinase signal transducer and activator of transcription (JAK-STAT) cascade plays a central role in the pathogenesis of many skin conditions. JAK inhibitors, with their ability to selectively target immune responses, are potential treatment options. Using the National Library of Medicine, we provide a comprehensive review of the use of United States Food and Drug Administration (FDA)-approved and emerging JAK or tyrosine kinase 2 (TYK2) inhibitors in a wide range of dermatologic conditions, including psoriasis, vitiligo, systemic lupus erythematosus, hidradenitis suppurativa, dermatomyositis, lichen planus, lichen planopilaris, sarcoidosis and graft-versus-host disease. In patients with psoriasis, oral deucravacitinib (TYK2 inhibitor) has been approved as a once-daily therapy with demonstrated superiority and efficacy over apremilast and placebo and tolerable safety profiles. In patients with vitiligo, topical ruxolitinib (JAK1 inhibitor) is approved as a twice-daily treatment for repigmentation. The efficacy of several other JAK inhibitors has also been demonstrated in several clinical trials and case studies for systemic lupus erythematosus, hidradenitis suppurativa, dermatomyositis, lichen planus, lichen planopilaris, sarcoidosis and graft-versus-host disease. Further investigations with long-term clinical trials are necessary to confirm their utility in treatment and safety for these diseases.

Comparing cutaneous research funded by the US National Institutes of Health (NIH) with the US skin disease burden.

BACKGROUND: Disease burden should be an important component for guiding research funding. OBJECTIVE: We sought to examine the relationship between dermatologic research funded from 2012 to 2013 by the National Institutes of Health (NIH) and US skin disease burden as measured by disability-adjusted life years in the Global Burden of Disease 2010 study. METHODS: A cross-sectional analysis was independently performed by 2 researchers who matched projects from the 2012 to 2013 NIH Research Portfolio Online Reporting Tools with 15 skin conditions and their respective disability-adjusted life years from Global Burden of Disease 2010. RESULTS: The NIH funded 1108 projects spanning the 15 skin conditions. Melanoma received almost half of the total skin condition budget (49.5%). Melanoma, nonmelanoma skin cancer, and leprosy were funded above what would be suggested by their disease burden, whereas dermatitis, acne vulgaris, pruritus, urticaria, decubitus ulcer, fungal skin diseases, alopecia areata, cellulitis, and scabies appeared underfunded. Bacterial skin diseases, viral skin diseases, and psoriasis were well matched with disease burden. LIMITATIONS: Disease burden is one of many factors that may be used to guide priority-setting decisions. CONCLUSION: Skin disease burden measured by disability-adjusted life year metrics partially correlates with NIH funding prioritization. Comparing US disease burden with NIH funding suggests possible underfunded and overfunded skin diseases.