Safety, Tolerability, Pharmacokinetics (PK) and Pharmacodynamics (PD) of GSK2831781 After an Intravenous (IV) Dose in Healthy Japanese and Caucasian Subjects, and a Subcutaneous (SC) Dose in Healthy Caucasian Subjects

GSK2831781 will be available as Dose-1 and Dose-2 as IV infusion or SC injection. Subjects will receive GSK2831781 Dose-1 IV diluted in 0.9% saline or GSK2831781 SC as multiples of Dose-2 SC.

Placebo will be 0.9% saline solution which will be administered in subjects as IV infusion or SC injection.