The study will evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of repeat ascending doses of GSK2018682. The study will also provide further evidence of the potential therapeutic dose-range by measuring the inhibitory effect of GSK2018682 on Absolute Lymphocyte Counts (ALC).

The study will evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of repeat ascending doses of GSK2018682. The study will also provide further evidence of the potential therapeutic dose-range by measuring the inhibitory effect of GSK2018682 on Absolute Lymphocyte Counts (ALC).

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.
• Females must be of non-childbearing potential.
• BMI within the range 19 - 29 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 within 6 months of the study.
• The subject has participated in a clinical trial and has received an investigational product within the following time period prior to the first dosing day in the current study: 30 days, 5 half-lives or twice the duration of the biological effect of the investigational product (whichever is longer).
• Exposure to more than four new chemical entities within 12 months prior to the first dosing day.
• Use of prescription or non-prescription drugs, including vitamins, herbal and dietary supplements (including St John's Wort) within 7 days (or 14 days if the drug is a potential enzyme inducer) or 5 half-lives (whichever is longer) prior to the first dose of study medication, unless in the opinion of the Investigator and GSK Medical Monitor the medication will not interfere with the study procedures or compromise subject safety.
• History of sensitivity to any of the study medications, or components thereof or a history of drug or other allergy that, in the opinion of the investigator or GSK Medical Monitor, contraindicates their participation.
• Were participation in the study would result in donation of blood or blood products in excess of 500 mL within a 56 day period.
• Pregnant females as determined by positive serum or urine hCG test at screening or prior to dosing.
• Unwillingness or inability to follow the procedures outlined in the protocol.
• Other exclusion criteria to be detailed at the time of physical screening by the Investigator

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