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In previous studies, we established that kolaviron (KV) (a biflavonoid from Garcinia kola seeds) elicited anti-oxidative and hepatoprotective effects in Wistar rats chronically treated with ethanol. The present study investigates the possible ameliorative effect of KV against ethanol-induced reproductive toxicity in male Wistar rats. Twenty-eight rats were randomly divided into four groups of seven animals each; Group 1 (control) was administered corn oil, group 2 was given 45%v/v ethanol at 3g/kg body weight, group 3 received ethanol and KV (200mg/kg) simultaneously and group 4 received KV alone. All drugs were given daily by oral gavage for 21 consecutive days. Ethanol treatment resulted in a significant (p<0.05) decrease in relative weight of testis of the animals. In the spermatozoa, ethanol intoxication resulted in 54%, 21% and 38% decreases in testicular protein content, sperm motility and count, respectively. In addition, ethanol administration enhanced lipid peroxidation (LPO) process assessed by the accumulation of malondialdehyde (MDA) in the testis. Precisely, MDA level was increased by 121% in the testis of ethanol-treated rats relative to the control. Furthermore, levels of testicular glutathione and activities of testicular antioxidant enzymes such as superoxide dismutase and catalase were significantly (p<0.05) reduced in ethanol-treated rats. Histopathology showed extensive degenerative changes in seminiferous tubules and defoliation of spermatocytes in testis of ethanol-treated rats. Interestingly, co-administration of KV with ethanol led to almost complete inhibition of testicular LPO thereby enhancing antioxidant status of the testis. Overall, KV ameliorates ethanol-induced toxic assault on testis and improves seminal qualities of the rats.

Kolaviron, a biflavonoid complex from Garcinia kola seeds, ameliorates ethanol-induced reproductive toxicity in male wistar rats.