EPHA7 and posterior cortical atrophy: Western blotting analysis displayed that the level of both EphA7 phosphorylation and ephrinA5 expression was significantly decreased in PCa tissues compared with that in normal tissues (Figure 7b), and that the expression of ephrinA5 positively correlated with the ratio of pEphA7/EphA7 in PCa tissues (Figure 7c), implying that the phosphorylation of EphA7 may be regulated by ephrinA5 in PCa progression.