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Pro-oxidative effects of Tempo in systems containing oxidants

机译:Tempo在含氧化剂的系统中的促氧化作用

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摘要

2,2,6,6-Tetramethylpiperidine-1-oxyl (Tempo), previously reported by us to augment oxidation of glutathione induced by peroxynitrite (Glebska J, Skolimowski J, Kudzin Z, Gwozdzinski K, Grzelak A, Bartosz G. Pro-oxidative activity of nitroxides in their reactions with glutathione. Free Radic Biol Med 2003; 35: 310-316) was found to increase oxidation of glutathione induced by various oxidants, including persulfate, tert-butyl hydroperoxide and hydrogen peroxide. Tempo augmented also the inactivation and thiol loss of alcohol dehydrogenase induced by 2,2'-azobis(2-amidinopropane) (AAPH) and oxidative degradation of deoxyribose induced by ammonium persulfate and tert-butyl hydroperoxide. These results point to a pro-oxidative effect of nitroxides on a range of biomolecules subjected to the action of various oxidants.
机译:2,2,6,6-四甲基哌啶-1-氧基(Tempo),先前我们曾报道过可增强过氧亚硝酸盐诱导的谷胱甘肽氧化(Glebska J,Skolimowski J,Kudzin Z,Gwozdzinski K,Grzelak A,Bartosz G. Pro-氮氧化物在与谷胱甘肽反应中的氧化活性(Free Radic Biol Med 2003; 35:310-316)被发现可增加由各种氧化剂(包括过硫酸盐,氢过氧化叔丁基和过氧化氢)诱导的谷胱甘肽的氧化。 Tempo还增强了由2,2'-偶氮双(2-ami基丙烷)(AAPH)诱导的乙醇脱氢酶的失活和巯基损失,以及由过硫酸铵和叔丁基氢过氧化物诱导的脱氧核糖的氧化降解。这些结果表明,氮氧化物对经受多种氧化剂作用的一系列生物分子具有促氧化作用。

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