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- W2040455583 abstract "The effects of thiols and thiocarbamides on hydroxyl radical (.OH) formation by the hypoxanthine(HYP)-xanthine oxidase(XOD)-Fe3+ .EDTA system were investigated in the range of 0.5-5 mM by colorimetrically measuring salicylate hydroxylation. Thiocarbamides powerfully inhibited the hydroxylation while thiols showed a paradoxical effect, enhancing it at low concentrations, but inhibiting it at high ones. Thiols in the presence of Fe3+ .EDTA generated superoxide anions (O2-.) and .OH during the oxidation, but thiocarbamides did not. A study of the effect of ergothioneine, a thiocarbamide present in mammals, on the .OH spin adduct of 5,5-dimethyl-1-pyrroline-N-oxide(DMPO) by EPR spectrometry showed that it effectively decreased the .OH spin adduct without causing the appearance of other signals. Reaction mechanisms are proposed for the O2-. evolution and .OH formation by the thiols themselves in the presence of Fe3+ .EDTA and .OH with thiols and thiocarbamides." @default.
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- W2040455583 date "1986-03-01" @default.
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- W2040455583 title "Thiol-induced hydroxyl radical formation and scavenger effect of thiocarbamides on hydroxyl radicals" @default.
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- W2040455583 doi "https://doi.org/10.1016/0162-0134(86)80042-3" @default.
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