Tertiary-butyl hydroperoxide induced oxidative stress and male reproductive activity in mice: Role of transcription factor NF-κB and testicular antioxidant enzymes

Abstract

Reactive oxygen species (ROS) have been proposed as a major factor affecting male reproductive capacity. The present study has evaluated the possible role of oxidative stress during testicular pathogenesis in male mice exposed to tertiary-butyl hydroperoxide (TBHP). TBHP was administered by daily intraperitoneal injection for 2 weeks. Treatment greatly increased lipid peroxidation in the testis and led to a significant decrease in sperm concentration and motility and a reduction in litter size relative to controls. An increase in testicular mRNA abundance of redox-regulated p50 and p65 subunits of NF-κB was observed after TBHP treatment. Evaluation of NF-κB regulated antioxidant enzymes in the testis revealed an increase in superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and glutathione- S-transferase (GST) activities and corresponding mRNA abundance. These results suggest a potential role of NF-κB in oxidative stress mediated changes in the physiology of male reproductive system.