Deucravacitinib, an oral, selective, allosteric tyrosine kinase 2 inhibitor, in patients from China mainland, Taiwan, and South Korea with moderate to severe plaque psoriasis: a phase 3 randomized clinical trial

Abstract Background Deucravacitinib, an oral, selective, allosteric tyrosine kinase 2 inhibitor, is approved in the United States, European Union, Japan, South Korea, China, and other countries for treatment of moderate-to-severe plaque psoriasis. Objective To evaluate the efficacy and safety of deucravacitinib in Asian patients with moderate to severe plaque psoriasis. Methods In the 52-week, blinded, phase 3 POETYK PSO-3 trial (NCT04167462), patients were randomized 1 : 2 to placebo (n = 74) or deucravacitinib 6 mg once daily (n = 146) for 16 weeks followed by deucravacitinib alone. Coprimary endpoints were achievement of ≥ 75% reduction from baseline in Psoriasis Area and Severity Index (PASI 75) and static Physician Global Assessment score of 0 (clear) or 1 (almost clear) (sPGA 0/1) at Week 16. Efficacy and safety were evaluated throughout. Results At Week 16, significantly higher proportions of patients receiving deucravacitinib versus placebo achieved PASI 75 (68.8% vs. 8.1%; P < 0.0001) and sPGA 0/1 (55.6% vs. 6.8%; P < 0.0001). Response rates with deucravacitinib were maintained through Week 52. Common adverse events included upper respiratory tract infection and nasopharyngitis. Serious adverse event and discontinuation rates were low. Conclusions Deucravacitinib was efficacious and well tolerated in Asian patients with moderate to severe plaque psoriasis.