In the present study, we measured the concentrations of reduced glutathione (GSH) and malonyldialdehyde (MDA) and the activities of glutathione peroxidase (GSH-Px), glutathione S-transferase (GSH-S-T), superoxide dismutase (SOD), catalase (CAT) and glucose-6-phosphate dehydrogenase (G-6-PD) in erythrocytes obtained freshly from adult male donors which was preserved with CPDA-1 anticoagulant (citrate,phosphate, dextrose, adenine) on different days of storage. At the end of the study, storage-associated alterations in antioxidant activities were noted and discussed. GSH, GSH-Px, GSH-S-T, SOD, CAT and G-6-PD activities decreased, but erythrocyte MDA levels, as anindex of lipid peroxidation, increased during the storage period. According to our results, glutathione-dependent antioxidant systems in erythrocytes might be depleted during long storage in blood bags.
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