Abstract
The present study was carried out to elucidate the effectiveness of curcumin in ameliorating the expression of superoxide dismutase (SOD) in cerebral cortex and cerebellum of rat brain under 6-propyl-2-thiouracil (PTU)-induced hypothyroidism. Induction of hypothyroidism in adult rats by PTU resulted in augmentation of lipid peroxidation (LPx), an index of oxidative stress in cerebellum but not in cerebral cortex. Curcumin-supplementation to PTU-treated (hypothyroid) rats showed significant reduction in the level of LPx in both the regions of brain. The decreased translated products (SOD1 and SOD2) and the unchanged activity of SOD in cerebral cortex of PTU-treated rats were increased on supplementation of curcumin to the hypothyroid rats. Declined translated products of SOD1 and SOD2 in cerebellum of PTU-treated rats were alleviated on administration of curcumin to hypothyroid rats. On the other hand, the decreased activity of SOD in cerebellum of PTU-treated rats was further declined on administration of curcumin to the hypothyroid rats. Results of the present investigation indicate that curcumin differentially modulates the expression of superoxide dismutase in rat brain cortex and cerebellum under PTU-induced hypothyroidism.
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