As shown in Table 1, the expression levels of SLC6A1 mRNA in prostate cancer patients with high Gleason score (P < 0.001), advanced clinical stage (P < 0.001) and positive PSA failure (P = 0.042) were significantly higher than those with low Gleason score, early clinical stage and negative PSA failure. This evidence concerns the gene SLC6A1 and Familial prostate cancer.