First Time in Human Study With GSK1325756

This study will evaluate the safety, tolerability, pharmacokinetics(PK) and pharmacodynamics (PD) of single and repeat oral doses of GSK1325756 in healthy, male volunteer subjects, including the assessment of the effect of GSK1325756 on ex vivo 'C-X-C Motif Ligand 1' (CXCL1)-induced 'Cluster of Differentiation 11b' (CD11b) cell surface expression on peripheral blood neutrophils. Selective antagonism of the interaction between 'C-X-C Receptor Type 2' (CXCR2) and its various chemokine ligands provides a potential strategy for reducing the underlying inflammation that contributes to the progression of Chronic Obstructive Pulmonary Disease (COPD). This study is the first administration of GSK1325756 to humans and will be conducted in four cohorts. Cohorts 1 and 2 will comprise of a double-blind, placebo-controlled, single dose escalation of GSK132576 in healthy adult males in two interlocking cohorts. The data generated from this single dose escalation component of the study (safety, tolerability, and where applicable, PK profile, and, if available, PD data) will enable decisions regarding progression from one to dose the next higher dose later within Cohorts 1 and 2. This data will also be reviewed in decisions regarding study progression to repeat dosing in Cohorts 3 and 4, and the most suitable doses of GSK1325756 that should be selected for these repeat dose cohorts.