IF staining demonstrated increased amounts of PCNA (purple) in vehicle‐treated controls, suggesting enhanced PCa cell growth in areas of increased SKP2 (green) and FOXA1(red) protein staining (Fig. 4C; Fig. S12a), in contrast to SZL P1‐41‐treated mice which demonstrated decreased PCNA upon SKP2 inhibition (Fig. 4C; Fig. S12a). This evidence concerns the gene PCNA and posterior cortical atrophy.