STX1A and prostate cancer: Some studies have demonstrated that the aberrant activation of the Wnt/β-catenin signaling is associated with tumor development and progression [5, 40–43] and in agreement with this, we found in this study that the Frizzled-7 gene promoter could drive the GFP and Stx1 genes expression in the liver, lung, breast, gastric, throat, and prostate cancer cell lines.