Approximately 384 patients with moderate to severe plaque psoriasis will be enrolled and randomly assigned to one of the 2 treatment groups in a 1:1 ratio (192 patients in the Bmab 1200 group and 192 patients in the Stelara group). Patients who are diagnosed as moderate to severe chronic plaque psoriasis for at least 6 months and are candidate for systemic therapy or phototherapy at the time of the screening visit will be enrolled. The study is planned to be conducted in Europe and North America across approximately 48 sites in 5 countries. The study will be conducted in an outpatient setting, and the participation for each patient will consist of a screening period (up to 4 weeks/28 days) and a double-blind, active-controlled treatment period (52 weeks) with a rerandomization step for switching therapy (Bmab 1200 with Stelara ) before Week 16 dosing. The treatment period before the switch is TP1 and post switch is TP2 (from Week 16 dosing to prior to Week 28 dosing) and TP3 (from Week 28 dosing to Week 52). The total duration of the study (excluding the screening period) will be 52 weeks.
This is a randomized, double-blind, active-controlled, parallel-group, multicenter study designed to compare the efficacy, safety, immunogenicity, and PK of Bmab 1200 with Stelara in adult patients with moderate to severe chronic plaque psoriasis.