CXCR4 and benign prostatic hyperplasia: FACs analysis of PC-3 and PNT2-C2 cell lines and primary benign and malignant prostate epithelial cells (Figure 5B(b)) shows that similar percentages of PC-3, BPH and CaP epithelial cells express CXCR4 (P>0.05) but expression was lower in PNT2-C2 cells (23% reduction; P=0.0048 as compared to CaP).