Lentiviral shRNA vectors targeting human FoxO1 and FoxO3 were described in our previous publication (18 (link)). Rictor retroviral vector and Lentiviral shRNA vector targeting human Rictor were described in the previous publication (38 (link)). NVP-BEZ235 was purchased from LC Laboratories. BKM120 was ordered from ChemieTek. MK2206 was ordered from Selleck. 4-OHT was purchased from Sigma. The following antibodies were used in this study: Vinculin (Sigma), FoxO1 (C29H4), FoxO3 (75D8), phospho-FOXO1(Thr24)/FOXO3(Thr32), S6, Ser240/244 phospho-S6, Rictor, AKT, Ser473 phospho-AKT, Thr308 phospho-AKT, GSK3, phospho-GSK3, cleaved caspase-3, Ki67, ERBB3 (all from Cell Signaling Technology).