A Study to Evaluate the Benefit and Safety of GSK2982772 in Moderate to Severe Psoriasis Participants

Plaque psoriasis is a chronic relapsing inflammatory skin disease that is characterized by keratinocyte hyper-proliferation and epidermal hyperplasia. Standard treatment for psoriasis generally requires long-term use of topical therapies, psoralen and ultraviolet A (PUVA), ultraviolet B (UVB) and/or systemic immunosuppressant therapies to achieve and maintain adequate disease control. This is a multicenter, randomized, double-blind study conducted in participants with moderate to severe plaque psoriasis. The study will evaluate the efficacy, safety, pharmacokinetic and pharmacodynamics profile of 960 milligram (mg) GSK2982772 administered as a once daily modified release (MR) formulation. Participants will be randomized in a 2:1 ratio to receive either 960 mg GSK2982772 or placebo for 12 weeks. The duration of the study, including Screening and follow-up, will be approximately 21 weeks for each participant.