This protocol describes the first administration of GSK2018682 to humans. The study will evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of single ascending doses of GSK2018682. The study will also provide preliminary evidence of the potential therapeutic dose-range by measuring the inhibitory effect of GSK2018682 on total lymphocyte counts.

This protocol describes the first administration of GSK2018682 to humans. The study will evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of single ascending doses of GSK2018682. The study will also provide preliminary evidence of the potential therapeutic dose-range by measuring the inhibitory effect of GSK2018682 on total lymphocyte counts.

Inclusion Criteria:

• Healthy as determined by a responsible and experienced physician, based on a medical evaluation including medical history, physical examination, laboratory tests and cardiac monitoring. A subject with a clinical abnormality or laboratory parameters significantly outside the reference range for the population being studied may be included only if the Investigator and the GSK Medical Monitor agree that the finding is unlikely to introduce additional risk factors and will not interfere with the study procedures. Subjects with lymphocyte counts outside the normal range should always be excluded from enrollment
• BMI within the range 19 - 28 kg/m2 (inclusive).

Exclusion Criteria:

• A positive pre-study Hepatitis B surface antigen or positive Hepatitis C antibody result within 3 months of screening
• Current or chronic history of liver disease, or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome or asymptomatic gallstones).
• A positive pre-study drug/alcohol screen.
• A positive test for HIV antibody.
• History of regular alcohol consumption
• Subjects with a history of, or examination suspicious for, skin cancer(s) including melanoma, basal cell or squamous cell carcinoma.
• Systolic blood pressure less than 95 mmHg or greater than 140 mmHg, or diastolic blood pressure less than or equal to 50 mmHg or greater than or equal to 95 mmHg.
• Symptomatic reduction in blood pressure after orthostatic challenge.
• Subjects with resting heart rate less than 45 beats per minute or greater than 90 beats per minute

Other criteria may apply as defined by the clinical protocol.

Patient-level data for this study will be made available through www.clinicalstudydatarequest.com following the timelines and process described on this site.