CXCR1 and posterior cortical atrophy: As shown in Figure 5F, tumor lysates from MDA-PCa-2b-CXCR1 (0.618 ± 0.013) xenografts displayed a ~40% decrease in VEGF expression relative to MDA-PCa-2b-CXCR2 (0.997 ± 0.110) and MDA-PCa-2b-Vec (1.000 ± 0.074).