Deucravacitinib in Plaque Psoriasis: 4-year Safety and Efficacy Results from the Phase 3 POETYK PSO-1, PSO-2, and LTE Trials

Abstract

Introduction: Deucravacitinib, an oral, selective, allosteric TYK2 inhibitor, is approved in multiple countries for treatment of adults with moderate to severe plaque psoriasis who are candidates for systemic therapy. Deucravacitinib was superior to placebo and apremilast in the global, 52-week, phase 3 POETYK PSO-1 and PSO-2 parent trials in moderate to severe plaque psoriasis. Upon completion, patients could enroll in the ongoing POETYK long-term extension (LTE) trial. Here, deucravacitinib safety/efficacy are reported through 4 years. Methods: PSO-1/PSO-2 randomized patients 1:2:1 to oral placebo, deucravacitinib 6 mg once daily, or apremilast 30 mg twice daily. At Week 52, patients enrolled in the LTE received open-label deucravacitinib. Safety was evaluated in patients receiving ≥1 deucravacitinib dose. Exposure-adjusted incidence rate (EAIR) per 100 person-years (PY) was used to assess adverse events (AEs). Efficacy outcomes included PASI 75, PASI 90, and sPGA 0/1 and were analyzed using mNRI in LTE patients receiving continuous deucravacitinib from Day 1 of the parent trials. Results: 1519 patients received ≥1 deucravacitinib dose; cumulative exposure was 4392.8 PY. EAIRs/100 PY were decreased/comparable from the 1-year to 4-year cumulative period, respectively, for AEs (229.2, 131.7), serious AEs (5.7, 5.0), deaths (0.2, 0.3), discontinuation due to AEs (4.4, 2.2), herpes zoster (0.8, 0.6), malignancies (1.0, 0.9), major adverse cardiovascular events (0.3, 0.3), and venous thromboembolism (0.2, 0.1). Clinical response rates with continuous deucravacitinib (n=513) were maintained from Year 3 (PASI 75, 73.8% [95% CI, 69.6-78.0]; PASI 90, 49.0% [44.4-53.7]; sPGA 0/1, 55.2% [50.5-59.9]) to Year 4 (PASI 75, 71.7% [67.0-76.3]; PASI 90, 47.5% [42.6-52.4]; sPGA 0/1, 57.2% [52.1-62.2]) by mNRI. Conclusion: Deucravacitinib demonstrated a safety profile through 4 years consistent with 3 years with no emergence of new or long-term safety signals. Efficacy was maintained through 4 years in patients receiving continuous deucravacitinib from Day 1 in PSO-1/PSO-2.