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- W2050205562 abstract "Hypochlorous acid (HOCl), the main product of the myeloperoxidase system, is a strong oxidant and a potent chlorinating agent, which can damage host tissues. In the present work, the scavenger effect of three aglycone flavonols (myricetin, quercetin and kaempferol) and of the natural glycoside flavonol, rutin, was studied towards HOCl using luminol-dependent chemiluminescence (CL). At 1 micro mol/L fi nal concentration, rutin was the most powerful scavenger of HOCl with an inhibitory luminol oxidation of 91.4% +/- 3.2%. Quercetin, kaempferol and myricetin inhibited the luminol-dependent CL at the same concentration only by 75.9% +/- 3.4%, 57.7% +/- 5.3% and 43.3% +/- 3.5%, respectively. With increasing concentration of these flavonols, a dose-dependent inhibition of luminol CL was observed. In order to prove to what extent flavonols scavenge HOCl, their concentrations that gave 50% inhibition of luminescence (IC50) were compared to IC50 values of the sulphur-containing compounds N-acetyl cysteine (NAC) and taurine. The scavenging activities of compounds tested decrease in the order: rutin > NAC > quercetin > kaempferol > taurine. The present study revealed that rutin was the most effective scavenger agent." @default.
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- W2050205562 date "2004-06-23" @default.
- W2050205562 modified "2023-10-17" @default.
- W2050205562 title "Scavenger effect offlavonols on HOCl-induced luminol chemiluminescence" @default.
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- W2050205562 doi "https://doi.org/10.1002/bio.772" @default.
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