First-time-in-human (FTIH) Study of GSK3145095 Alone and in Combination With Other Anticancer Agents in Adults With Advanced Solid Tumors

GSK3145095 will be available as capsule (size 1 containing 5 to 25 mg GSK3145095 and size 0 containing 25 to 75 mg GSK3145095) or tablet (25, 50, 200 mg white to slightly covered round/oval shaped coated) for oral administration in the fasted stated with approximately 200 milliliters (mL) of water.

Pembrolizumab will be available as solution for infusion (100 milligrams/ 4 milliliter) at a dose of 200 mg via IV infusion for 30 minutes (given the variability of infusion pumps from site to site, a window of -5 minutes and +10 minutes is permitted i.e., infusion time is 25 to 40 minutes).