Abstract
Aluminum (Al) is an environmental toxin that induces oxidative stress in neuronal cells. Mushroom cultivar extract (MCE) acted as a potent antioxidant agent and protects against cellular oxidative stress in human cultured neuronal cells. This study aimed to investigate the neuroprotective effect of MCE against Al-induced neurotoxicity in rat brain. Forty Sprague-Dawley rats were divided into 4 groups (10 rats per group), control group, MCE-fed group, Al-administered group and MCE/Al-treated group. Animals were continuously fed ad-libitum their specific diets for 4 weeks. At the end of the experiment, all rats were sacrificed and the brain tissues were homogenized and examined for biochemical measurements of neurocellular oxidative stress indices [glutathione (GSH), Total Antioxidant Capacity (TAC), antioxidant enzymes and oxidized dichlorofluorescein (DCF)]. Al-administration caused inhibition of antioxidant enzymes and a significant decrease in GSH and TAC levels, meanwhile it positively increased cellular oxidized DCF level, as well as Al concentration in brain tissues. Feeding animals with MCE had completely offset the Al-induced oxidative stress and significantly restrict the Al accumulation in brain tissues of Al-administered rats. The results obtained suggest that MCE acted as a potent dietary antioxidant and protects against Al-mediated neurotoxicity, by abrogating neuronal oxidative stress.
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