Abstract
Phytic acid stimulated the myoglobin-t-butylhydroperoxide (TBHP)-catalysed oxidation of uric acid, but inhibited the peroxidation of erythrocyte membrane lipids induced by the same system. Butylated hydroxy-toluene, a free radical chain reaction-terminating antioxidant, also suppressed the myoglobin-TBHP-induced lipid peroxidation. Moreover, phytic acid inhibited the hydroxyl radical-induced degradation of deoxyribose, but the extent of inhibition in this system was reduced by increasing the ferric ion concentration, suggesting that these effects of phytic acid on the myoglobin-TBHP-mediated oxidation are more likely attributable to its metal chelating properties rather than to a free radical scavenging action. The effectiveness of phytic acid, a naturally occurring antioxidant, in the inhibition of both iron- (as previously shown) and myoglobin-dependent lipid peroxidation suggests its possible therapeutic application as a non-toxic antioxidant for ameliorating the extent of oxy-radical-mediated myocardial ischemia/reperfusion damage.
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Abbreviations
- ASC:
-
Ascorbic acid
- BHT:
-
Butylated Hydroxytoluene
- DMSO:
-
Dimethyl Sulfoxide
- TBHP:
-
t-Butylhydroperoxide
- TBA:
-
Thiobarbituric Acid
- TBARS:
-
Thiobarbituric Acid-reactive Substances
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Ko, K.M., Godin, D.V. Effects of phytic acid on the myoglobin-t-butylhydroperoxide-catalysed oxidation of uric acid and peroxidation of erythrocyte membrane lipids. Mol Cell Biochem 101, 23–29 (1991). https://doi.org/10.1007/BF00238434
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DOI: https://doi.org/10.1007/BF00238434