Journal
DERMATOLOGIC THERAPY
Volume 35, Issue 6, Pages -Publisher
WILEY
DOI: 10.1111/dth.15437
Keywords
Janus kinase inhibitors; Janus kinases; morphea; scleroderma; systemic sclerosis
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Translation: This article reviews preclinical studies and clinical cases of JAK inhibitors for the treatment of morphea and the cutaneous manifestations of SSc, providing evidence to support further research and use of JAK inhibitors in the management of skin fibrosis in morphea and SSc.
Morphea and systemic sclerosis (SSc) are rare disorders of connective tissue characterized by increased skin thickness and fibrosis, with current treatment options having variable efficacies, many with limited therapeutic benefit. Janus kinase (JAK) inhibitors have been shown in preclinical studies to inhibit the fibrotic pathway in murine models of systemic sclerosis, by blocking TGF-beta mediated pathway of STAT protein activation. Additionally, case reports of the treatment of morphea and SSc with tofacitinib, a JAK 1/3 inhibitor, have shown improvement in skin sclerosis. Several JAK inhibitors have been developed and utilized in dermatologic and rheumatologic diseases. To date, tofacitinib has been by far the most commonly trialed JAK inhibitor in patients with SSc and morphea. Herein we review the preclinical studies reported in the literature supporting the use and efficacy of JAK inhibitors for the treatment of morphea and the cutaneous manifestations of SSc, as well as discuss the clinical cases published to date illustrating the benefits of JAK inhibitors in disease management. The pathogenesis and mechanism of action will be reviewed as it relates to the process of skin fibrosis in morphea and SSc, along with the murine models illustrating efficacy of JAK inhibitors in fibrotic disease. Based on available preclinical and clinical data as well as consideration of the mechanism of action of JAK inhibitors on the pathway for cutaneous fibrosis, there is promising evidence to support the use and further study of JAK inhibitors in the management of morphea and cutaneous fibrosis in SSc.
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