(A) Expression of canine GRPr mRNA in dog primary prostate cancers (PCa, n = 5), cell lines (n = 4), and normal prostate tissues (n = 3) measured by qRT-PCR. (B) Human GRPr mRNA expression in different clones of Ace-1-huGRPr cells, vector transfected Ace-1 cells, parent Ace-1 and PC-3 cells. The bars represent the relative mRNA expression ± SD. Significant difference is indicated as *P≤0.05.