ZEB1 and prostate cancer: In addition, the effects of ZEB1 in prostate cancer cells were mediated by Src signalling; that is PP2, a specific inhibitor of the Src signalling, dose dependently reduced the p‐Src527 level but not p‐Src416 level, while ZEB1 knockdown also down‐regulated the level of p‐Src527 in PC3 and DU‐145 cells.