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Effects of vitamin E status and exercise training on tissue lipid peroxidation based on two methods of assessment






Nutrition Research 13(2): 219-224

Effects of vitamin E status and exercise training on tissue lipid peroxidation based on two methods of assessment

Effects of dietary vitamin E deprivation, acute exercise and training on tissue lipid peroxidation as determined via a thiobarbituric acid reactive substances (TBARS) assay and an ion-pairing HPLC assay for malondialdehyde are reported. Female rats were fed diets with (+E) or without (-E) vitamin E for 8 weeks, after which subgroups of rats were exercised for 45 min and immediately sacrificed. Remaining animals continued on their diets, were sedentary or trained for 8 additional weeks, and were sacrificed with or without prior exercise. Little malondialdehyde, as determined by HPLC, was found in liver, heart or muscles (with the exception of white vastus) following any condition. Significant levels of TBARS were found in all tissues following all conditions. Significantly higher levels were found in many tissues with the -E diet and acute exercise. TBARS levels did not correlate with HPLC-determined malondialdehyde levels indicating that determination of the presence and degree of exercise induced lipid peroxidation are specific to each assay and conclusions regarding its occurrence must be made with caution.

Accession: 002367138

DOI: 10.1016/S0271-5317(05)80443-9

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