Reactivity, Selectivity, and Reaction Mechanisms of Aminoguanidine, Hydralazine, Pyridoxamine, and Carnosine as Sequestering Agents of Reactive Carbonyl Species: A Comparative Study
作者:Mara Colzani、Danilo De Maddis、Gaia Casali、Marina Carini、Giulio Vistoli、Giancarlo Aldini
DOI:10.1002/cmdc.201500552
日期:2016.8.19
spectrometry (HRMS). The reactivity of the compounds was RCS dependent: carnosine efficiently quenched 4‐hydroxy‐trans‐2‐nonenal, pyridoxamine was particularly active towards malondialdehyde, aminoguanidine was active towards methylglyoxal and glyoxal, and hydralazine efficiently quenched all RCS. Reaction products were generated in vitro and were characterized by HRMS. Molecular modeling studies revealed that
活性羰基物质(RCS)是内源性或外源性副产物,参与各种基于氧化的疾病的致病机制。通过羰基淬灭剂对RCS进行解毒是一种有前途的治疗策略。在研究最多的淬灭剂中,有氨基胍,肼苯哒嗪,吡ido胺和肌肽。本文分析和比较了它们对四种RCS(4-羟基-反式-2-壬烯醛,甲基乙二醛,乙二醛和丙二醛)的淬灭活性。通过使用基于高分辨率质谱(HRMS)的创新方法,在体外评估了它们预防蛋白质羰基化的能力。化合物的反应性取决于RCS:肌肽可有效淬灭4-羟基反式-2-壬烯醛,吡x胺对丙二醛特别有效,氨基胍对甲基乙二醛和乙二醛有活性,肼苯哒嗪可有效淬灭所有RCS。反应产物在体外产生并通过HRMS表征。分子模型研究表明,反应性受特定的立体电子参数控制,这些参数可用于合理设计改进的羰基猝灭剂。