This study aimed at evaluating the protective role of Telfairia occidentalis extract (TOE) irradiationinduced oxidative stress in rat brain. Aqueous TOE was administered orally to adult rats for 30 days at doses of 400 mg/kg body weight, 800 mg/kg body weight and 1600 mg/kg body weight, and a corresponding group of rats were treated with 50 mg/kg body weight vitamin E (VE), a standard antioxidant before irradiation at a dose of 2 Gy of gamma rays. The control rats received distilled water only. The rats were observed and sacrificed at 24 hours, 15 and 30 days post-irradiation. The results demonstrated a significant increase in levels of malondialdehyde (MDA), an end product of lipid peroxidation (LPO) and hydrogen peroxide (H 2 O 2) generation with a concomitant decrease in the activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), glutathione-S-transferase (GST), a phase two xenobiotic metabolizing enzyme, and a corresponding decrease in the level of reduced glutathione (GSH) after twenty-four hours, 15 and 30 days post-irradiation compared with the control. Treatments with TOE and VE significantly reversed oxidative stress of irradiated rats when compared with the control rats. In conclusion, supplementation with TOE could reduce radiationinduced biochemical disorders in brain tissues.
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