First, PCAT6 expression was knocked down via lentiviral transfection of two shRNAs in PC‐3 and C4‐2B cells, which express higher PCAT6 levels among PCa cell lines, and PCAT6 was overexpressed using exogenous plasmid in 22RV1 cells with lower PCAT6 levels (Figure S2b). This evidence concerns the gene PCAT6 and posterior cortical atrophy.