Mitochondrial dysfunction induced impairment of spermatogenesis in LPS-treated rats: modulatory role of lycopene

Abstract

The current study investigates the potential toxicity of lipopolysaccharide (LPS) on the mitochondrial fraction of rat testis and the possible protective efficacy of lycopene. Adult male Wistar rats were categorized into four groups. Two groups were administered LPS (0.1mg/kg/day for 7 days i.p.); one of these groups received lycopene treatment (4 mg/kg/day by oral gavage, 24h before LPS treatment) (Group IV) and the other received LPS alone (Group III). A vehicle-treated group (Group I) and a lycopene drug control group (Group II) were also included. Sperm count and motility were significantly decreased in Group III. The testicular mitochondrial fraction of Group III showed significant increase in basal and Fe(2+)-induced lipid peroxidation, along with a significant increase in hydrogen peroxide (H(2)O(2)) level. Moreover, the activities of mitochondrial enzymic (SOD, CAT, GPx, GR and ADH) and non-enzymic (GSH and ascorbate) antioxidants levels were decreased. Group III also showed decline in the activities of TCA enzymes such as SDH, MDH and ICDH. Pretreatment with lycopene showed normal sperm parameters, lipid peroxidation, H(2)O(2) level, antioxidant defenses and TCA enzyme activities. In conclusion, this study indicates that LPS-induced oxidative stress leads to functional damages in the testicular mitochondria. Lycopene pretreatment provided a marked normalization in these parameters.