AKT1 and posterior cortical atrophy: In an effort to define the mechanisms of PDPK1‐mediated regulation of PCa cell survival, we observed that depletion of PDPK1 reduced SGK3 phosphorylation, but have no effects on AKT phosphorylation in cell line models with low‐ and hyperactivated background levels of AKT activity (DU145 and PC3 respectively).59