Abstract
Activities of antioxidant enzymes involved oxygen free radical metabolism in the liver and lung were investigated in 2,4, and 30 months old Wistar albino rats. The levels of SOD, GSH-Px, GSH and protein-SH were decreased whereas MDA increased, in the liver as well as the lung of the old rats (30 months old) compared to the young rats (2 and 4 months old). The data suggests that the failure of the free radical protective mechanism may be one of the important contributors to the process of ageing.
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