KLRK1 and posterior cortical atrophy: Co-culture experiments led to decreased recognition of PCa cells and lower NK cell cytotoxicity due to increased expression of the NK cell inhibitory receptor ILT2/CD85j (68), which recognizes HLA-A, B, C and G molecules (80), and reduction of the activating receptors NKp46, NKG2D, and CD16, by PCa cells (68).