GSK2894512 Vehicle-Controlled Study for Adult Plaque Psoriasis

This study will evaluate the efficacy and safety of GSK2894512 cream for the topical treatment of plaque psoriasis (psoriasis) with its vehicle cream. This is a randomized, double-blind, vehicle-controlled, parallel-group, multicenter study in adults with psoriasis. The aim of this study is to show superiority of GSK2894512 over vehicle by comparing their response rates. The study will consist of 3 periods: up to 4 weeks screening, 12 weeks blinded treatment, and 1 week post-treatment follow-up period. Subjects will apply randomized study treatment to all psoriasis lesions once daily for 12 weeks. Subjects will be stratified by Baseline physician global assessment (PGA) category (PGA score=2, PGA score \>=3) at randomization. Approximately 120 subjects will be randomized into the study of which 80 will receive GSK2894512 1% cream and 40 will receive vehicle cream. Total duration of a subject's participation in the study will be approximately for 14 to 17 weeks.