The main objective of this study was evaluation of the neuroprotective potential effect of Ocimum basilicum on oxidative stress status in rat induced Alzheimer's disease. Fifty rats were divided into five groups (ten rats each). Rats were treated orally with AlCl3 to induced AD. Group 1 (control group). Group 2 (AD group): supplemented orally with AlCl3 (17mg/kg/day) for four weeks. Group 3 (OB/AD group) supplemented concomitantly with oral rivastigmine (3 mg/kg /day). Group 4 (OB/AD group) supplemented concomitantly with oral OB (250mg/kg/day) and Group 5 (OB/AD group) supplemented concomitantly with oral OB (500 mg/kg/day). The results showed that the plant leaves extract increased serum superoxide dismutase (SOD) with a significant decrease of a serum MDA and also the aggregation of tau protein expression was decreased . Histological changes were observed in brain tissues of AD rats. However, the high dosing of the plant leaves extract (500 mg/kg) was more powerful than the low treatment with low dose (250 mg/kg) by decreasing Tau protein expression. The results suggest that Ocimum basilicum can relieve symptoms and prevent the progression of AD severity by improving memory function. It can be concluded that OB leaves were alleviated the memory impairment and learning abilities due to antioxidants activity of flavonoids, tannins and terpenoids.
Key words: : Tau protein expression, SOD, MDA, Ocimum basilicum extract , Histological alterations
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