title: Relationship between antioxidant potential and oxidative damage to lipids, proteins and DNA in aged rats.
abstract: Oxidative stress has been implicated to play a major role in aging and age-related diseases. In the present study, we investigated the effects of aging on the total antioxidant capacity, uric acid, lipid peroxidation, total sulfhydryl group content and damage to DNA in adult (6 months), old (15 months) and senescent (26 months) male Wistar rats. The antioxidant capacity, determined by phycoerythrin-based TRAP method (total peroxyl radical-trapping potential) was significantly decreased in the plasma and myocardium of old and senescent rats, whereas plasma level of uric acid was elevated in 26-month-old rats. Age-related decline in plasma and heart antioxidant capacity was accompanied by a significant loss in total sulfhydryl group content, increased lipid peroxidation and higher DNA damage in lymphocytes. Correlations between TRAP and oxidative damage to lipids, proteins and DNA suggest that the decline in antioxidant status may play an important role in age-related accumulation of cell damage caused by reactive oxygen species.
authors.affiliation: Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University, Martin, Slovak Republic. sivonova@jfmed.uniba.sk
authors.forename: M
authors.initials: M
authors.lastname: Sivonová
authors.forename: Z
authors.initials: Z
authors.lastname: Tatarková
authors.forename: Z
authors.initials: Z
authors.lastname: Duracková
authors.forename: D
authors.initials: D
authors.lastname: Dobrota
authors.forename: J
authors.initials: J
authors.lastname: Lehotský
authors.forename: T
authors.initials: T
authors.lastname: Matáková
authors.forename: P
authors.initials: P
authors.lastname: Kaplán
mesh_terms: D000375:Aging / Q000378:metabolism*; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D002839:Chromans / Q000494:pharmacology; D020552:Comet Assay; D004247:DNA / Q000378:metabolism*; D006321:Heart / Q000187:drug effects; D050356:Lipid Metabolism / Q000187:drug effects*; D008214:Lymphocytes / Q000187:drug effects / Q000378:metabolism; D008297:Male; D008856:Microscopy, Fluorescence; D009206:Myocardium / Q000378:metabolism; D010084:Oxidation-Reduction; D018384:Oxidative Stress / Q000187:drug effects*; D011506:Proteins / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar; D013438:Sulfhydryl Compounds / Q000378:metabolism; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism; D014527:Uric Acid / Q000097:blood
chemical_list: D000975:Antioxidants; D002839:Chromans; D011506:Proteins; D013438:Sulfhydryl Compounds; D017392:Thiobarbituric Acid Reactive Substances; D014527:Uric Acid; D004247:DNA; C010643:6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid