ITGA2 and posterior cortical atrophy: Results from the immunoblot analysis showed that ITGA2 was enriched in exosomes of most of metastatic PCa cells such as PC3, DU145, LNCaP, and CWR-R1 cells compared to its modest expression in normal RC77N/E and RWPE1 cells as shown in Figure 1D. Interestingly, the cellular expression of ITGA2 was distinguished in most of PCa and normal cells except LNCaP, C4-2B and MDA-PCa-2b.