An Open Label Positron Emission Tomography Study in Healthy Male Subjects to Investigate Brain DAT and SERT Occupancy,Pharmacokinetics and Safety of Single Oral Doses of GSK1360707, Using 11C- PE2I and 11C-DASB as PET Ligands

GSK1360707 is a potent re-uptake inhibitor of the neurotransmitters dopamine, norepinephrine and serotonin. This is a single dose PET study in healthy subjects.A final analyses of safety data following exposure to single oral doses, from the first time in human study, with GSK1360707 has demonstrated that the compound is well tolerated up to a dose of 150mg. This imaging study will be an open label, non-randomised PET occupancy study using healthy male volunteers. The degree and time course of DAT and SERT occupancy by GSK1360707 will be determined. The PK/PD relationship between plasma concentrations of GSK1360707 and DAT and SERT occupancy will be described.This protocol amendment includes the flexibility to split the total dose into two doses e.g. 120mg per day could be split into two doses of 60mg. Splitting the total dose is most likely required to maintain therapeutic occupancy on the transporters over the course of the day; in addition it is expected that splitting the dose may reduce effects on vital signs. Therefore collecting data following split dosing will enable best predictions of therapeutic doses to be progressed in subsequent clinical studies.