Authors summarise their earlier results on the concentrations of some antioxidant parameters and activities of antioxidant enzymes in the tissues of developing chick embryo and newly hatched chick as well as in the red blood cells (RBC) and blood plasma of newborn (n = 7) and growing (n = 10) calves. Chick results showed different antioxidant systems in the liver and brain: high levels of vitamins A and E with high activities of antioxidant enzymes were found in the liver (Table 1) whereas the brain expressed high vitamin C concentration (Table 2). The exposure of newborn calves to atmospheric oxygen did not cause substantial changes in the antioxidant defence of RBC and blood plasma during the first two days of life (Table 3). RBC antioxidant defence in the calves and that in the cows was similar but plasma carotenoid and vitamin E levels were significantly higher in the cows. In growing calves higher level of malondialdehyde (MDA) with decreasing concentration of reduced glutathione (GSH) in RBC indicated significant increase in LP processes (Table 4). Activities of glutathione-peroxidase (GPX) and catalase (CAT) were higher in the suckling calves than in the growing ones. High plasma carotenoid and vitamin E levels in the growing calves versus suckling ones showed in all probability not age-related but nutritional differences. The results achieved in the two species show some connections between LP processes and ageing.
|Translated title of the contribution||Ageing and lipid peroxidation|
|Number of pages||5|
|Journal||Magyar Allatorvosok Lapja|
|Publication status||Published - Dec 1 1996|
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