Alexandre et al. [18] reported the presence of OXA and OX1R in two cancer cell lines, the androgen-responsive cell line LNCaP and the androgen-unresponsive cell line AI DU 145, in benign prostate hyperplasia (BPH) and in cancer of the prostate (CaP) at various stages. This evidence concerns the gene HCRTR1 and prostate carcinoma.