A Study to Evaluate the Safety, Mode of Action and Clinical Efficacy of GSK3050002 in Subjects With Psoriatic Arthritis

The 3 mL glass vial contains white to off-white lyophilized powder which requires reconstitution with sterile water for injection.Prepared as 100 milligrams per milliliter (mg/mL) solution; lower concentrations prepared by dilution with 0.9% weight by volume (w/v) sodium chloride Injection for infusion.

Normal saline (0.9% sodium chloride) will be used as placebo.