MAPK1 and posterior cortical atrophy: Importantly, knock‐down of AKT1,27, 28, 29 AKT3,27, 28, 29 GSK3A,30, 31, 32 GSK3B,30, 31, 32, 33, 34, 35 MAPK1 (also known as ERK2),36, 37 MAPK4 (also known as ERK4)29 and ROCK238, 39, 40 have been shown to inhibit PCa cell growth, independently validated our results.