Combined effects of plant extracts and xenobiotics on liposomal lipid peroxidation. Part 1. Marigold extract-ciprofloxacin/pyralene
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Methanolic (70%) extracts of marigold flower, leaf, stem and root, after solvent removal, were successively extracted with ether, chloroform, ethyl acetate, and n-butanol - the residue being the corresponding aqueous extract. All five extracts were evaporated to dryness and then dissolved in 50% EtOH to obtain 6% (w/v) solutions. These solutions, either alone or in combination with different doses of ciprofloxacin or pyralene, were used to study their effect on liposomal lipid peroxidation (LPx) induced by Fe 2+ and ascorbic acid. The majority of the extracts of marigold flower, leaf and stem showed an antioxidant effect, the butanol extract of roots exhibiting a pro-oxidative character. At lower doses, ciprofloxacin did not affect LPx, at higher doses a dose-dependent increase in LPx was observed. The extracts in combination with ciprofloxacin showed a protective effect, which was also dose-dependent. The butanolic extract of root snowed no synergistic effect with ciprofloxacin. Pyral...ene alone exhibited a pro-oxidative action on liposomal LPx. Aqueous and butanolic extracts of flower, leaf, and stem had a protective effect in combination with pyralene. The butanolic extract of root showed a pro-oxidative synergistic effect with pyralene.
Keywords:marigold / polychlorinated biphenyls / liposomes / lipid peroxidation
Source:Oxidation Communications, 1999, 22, 4, 487-494
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