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Abstract
Levels of certain antioxidants namely reduced glutathione (GSH), ascorbic acid (Vit C), α-tocopherol (Vit E) and antioxidant enzymes, superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and glutathione reductase (GR) were compared in monkey and rat brain microvessels which constitute the blood-brain barrier (BBB). The BBB of both the species contains appreciable amounts of the antioxidants to protect against oxidative damage. The level of protection in rat seems to be more efficient than monkey since rat microvessels contain higher concentrations of some of the bio-antioxidants. The comparative status of enzymatic and non-enzymatic protective system against oxidation in the brain microvessels has been discussed.