Tyrosine kinase 2 and Janus kinase‒signal transducer and activator of transcription signaling and inhibition in plaque psoriasis.

Abstract

Plaque psoriasis is a common, chronic, systemic, immune-mediated inflammatory disease. The Janus kinase-signal transducer and activator of transcription pathway plays a major role in intracellular cytokine signaling in inflammatory processes involved in psoriasis. Although Janus kinase (JAK) 1-3 inhibitors have demonstrated efficacy in patients with moderate-to-severe psoriasis, safety concerns persist and no JAK inhibitor has received regulatory approval to treat psoriasis. Thus, an opportunity exists for novel oral therapies that are safe and efficacious in psoriasis. Tyrosine kinase 2 (TYK2) is a member of the JAK family of kinases and regulates signaling and functional responses downstream of the interleukin 12, interleukin 23, and type I interferon receptors. Deucravacitinib, which is an oral, selective inhibitor that binds to the regulatory domain of TYK2, and brepocitinib (PF-06700841) and PF-06826647, which are topical and oral TYK2 inhibitors, respectively, that bind to the active (adenosine triphosphate-binding) site in the catalytic domain, are in development for psoriasis. Selective, allosteric inhibition of TYK2 signaling may reduce the potential for toxicities associated with pan-JAK inhibitors. This article reviews Janus kinase-signal transducer and activator of transcription and TYK2 signaling and the efficacy and safety of JAK inhibitors in psoriasis to date, focusing specifically on TYK2 inhibitors.

• Authors: James G Krueger, Iain B McInnes, Andrew Blauvelt
• Journal: Journal of the American Academy of Dermatology (J Am Acad Dermatol) Vol. 86 Issue 1 Pg. 148-157 (01 2022) ISSN: 1097-6787 [Electronic] United States
• PMID: 34224773 (Publication Type: Journal Article, Review)
• Copyright: Copyright © 2021 American Academy of Dermatology, Inc. Published by Elsevier Inc. All rights reserved.

Chemical References

• Janus Kinase Inhibitors
• Interleukin-12
• Janus Kinase 1
• Janus Kinases
• TYK2 Kinase

Topics

• Humans
• Interleukin-12
• Janus Kinase 1
• Janus Kinase Inhibitors (pharmacology, therapeutic use)
• Janus Kinases
• Psoriasis (drug therapy)
• TYK2 Kinase (metabolism)