In this field, several research works found lower GSTP1 expression in prostate cancer (Lin et al., 2001; Martignano et al., 2016; Mian et al., 2016; Zelic et al., 2016; Zhang et al., 2015), endometrial cancer (Chan et al., 2005), hepatocellular cancer (Li, Li, Gao, & Shi, 2015), and ovarian cancer (Shilpa, Bhagat, Premalata, Pallavi, & Krishnamoorthy, 2014). This evidence concerns the gene GSTP1 and prostate cancer.