GSK2636771

GSK2636771 is a potent and selective, orally bioavailable inhibitor of phosphatidylinositol 3-kinase-beta (PI3Kβ) for the treatment of PTEN deficient tumors. GSK2636771 shows selectively inhibitory activity in PTEN null cell lines (human prostate adenocarcinoma PC-3 and breast cancer HCC70) with EC50 of 36 nM and 72 nM, respectively. GSK2636771 decreases phosphorylated protein kinase Akt (Ser473) levels in these xenograft models. GSK2636771 (100 mg/kg) do not increase glucose/insulin levels in mice. GSK2636771 is currently in Phase I/II trials.