... DISCUSSION The findings in this study show that GR is highly expressed in epithelial cells of the male genital tract, especially in the Ó FEBS 2002 Glutathione reductase in male reproduction system ... level of expression of aldose reductase was also detected in the epithelia of the male genital tract In addition, glutathione S-transferase is present in the male reproductive system [45] Thus, the ... occur in spermatozoa during their migration through the epididymis, the oxidation of sulfhydryls is related to the acquisition of motility [4,5] During epididymial migration, sulfhydryls in the...