IFITM3 and posterior cortical atrophy: To confirm the effect of IFITM3 on the migration of PCa cells under different TGF-β activation conditions, qRT-PCR was used to detect the expression levels of metastasis-associated molecules, such as fibroblast growth factor (FGFs), parathyroid hormone-related peptide (PTHrP), fibronectin, and snail.