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- W2000651819 abstract "Mangiferin, a naturally occurring glucosylxanthone, has been described as having antidiabetic, antiproliferative, immunomodulatory and antioxidant activities. In this study we report for the first time the iron-complexing ability of mangiferin as a primary mechanism for protection of rat liver mitochondria against Fe2+-citrate induced lipid peroxidation. Thiobarbituric acid reactive substances and antimycin A-insensitive oxygen consumption were used as quantitative measures of lipid peroxidation. Mangiferin at 10 μM induced near-full protection against 50 μM Fe2+-citrate-induced mitochondrial swelling and loss of mitochondrial transmembrane potential (ΔΨ). The IC50 value for mangiferin protection against Fe2+-citrate-induced mitochondrial thiobarbituric acid reactive substance formation (9.02 ± 1.12 μM) was around 10 times lower than that for tert-butylhydroperoxide mitochondrial induction of thiobarbituric acid reactive substance formation. The xanthone derivative also inhibited the iron citrate induction of mitochondrial antimycin A-insensitive oxygen consumption, stimulated oxygen consumption due to Fe2+ autoxidation and prevented Fe3+ ascorbate reduction. Absorption spectra of mangiferin–Fe2+/Fe3+ complexes also suggest the formation of a transient charge transfer complex between Fe2+ and mangiferin, accelerating Fe2+ oxidation and the formation of a more stable Fe3+–mangiferin complex unable to participate in Fenton-type reaction and lipid peroxidation propagation phase. In conclusion, these results show that in vitro antioxidant activity of mangiferin is related to its iron-chelating properties and not merely due to the scavenging activity of free radicals. These results are of pharmacological relevance since mangiferin and its naturally contained extracts could be potential candidates for chelation therapy in diseases related to abnormal intracellular iron distribution or iron overload." @default.
- W2000651819 created "2016-06-24" @default.
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- W2000651819 date "2005-04-01" @default.
- W2000651819 modified "2023-10-03" @default.
- W2000651819 title "Iron complexing activity of mangiferin, a naturally occurring glucosylxanthone, inhibits mitochondrial lipid peroxidation induced by Fe2+-citrate" @default.
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- W2000651819 doi "https://doi.org/10.1016/j.ejphar.2005.03.007" @default.
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