The following antibodies were purchased from Cell Signaling Technologies: pNDRG1, pPDK1, pAKT308, pAKT473, pGSK3β (Ser 9), pPRAS40 (Thr 246), pFOXO3a (Thr 32), pERK1/2, AKT, FOXO3a, pP70S6K (Thr 389), pS6K (Ser 235/236), PRAS40, GSK3b, ERK1/2, SGK3, cyclin D1, PTEN, P70S6K, and S6. Antibodies against β-actin, SGK1, PKC, and tubulin were purchased from Santa Cruz Biotechnology. 4-Hydroxytamoxifen and antibodies against S100 were purchased from Sigma. Synthesis of the PDK1 inhibitor GSK2334470 was performed as previously described (5 (link)).