Thiol-Induced Nitric Oxide Release from 3-Halogeno-3,4-dihydrodiazete 1,2-Dioxides
作者:Igor A. Kirilyuk、Darkhan I. Utepbergenov、Dmitrii G. Mazhukin、Klaus Fechner、Katharina Mertsch、Valery V. Khramtsov、Ingolf E. Blasig、Reiner F. Haseloff
DOI:10.1021/jm960737s
日期:1998.3.1
their reactivity toward thiols was analyzed. The 3-bromo- and 3-chloro-DD derivatives were found to react with thiols; this reaction can lead to NO formation, DD 2a being the most reactive compound. 2-(Hydroxyamino)-2-methylbutan-3-one oxime (5a) and 2-hydroxy-2-methylbutan-3-one oxime (6) were the main products isolated from the reaction of 1a with cysteine. Reaction rates of DD with thiols were dependent
在这项工作中,我们研究了3,4-二氢重氮1,2-二氧化物(DD)的血管舒张作用和抗凝集作用背后一氧化氮(NO)释放的机理。研究中包括六种衍生物,即3-溴和3-氯-3,4,4-三甲基-DD(1a,b),3-溴和3-氯-4-甲基-3,4 -六亚甲基-DD(2a,b),3,3,4,4-四甲基-DD(3)和3-甲基-3,4-六亚甲基-DD(4),分析了它们对硫醇的反应性。发现3-溴-和3-氯-DD衍生物与硫醇反应;该反应可导致NO生成,DD 2a是反应性最高的化合物。从1a与半胱氨酸的反应中分离出的主要产物是2-(羟基氨基)-2-甲基丁-3-酮肟(5a)和2-羟基-2-甲基丁-3-酮肟(6)。DD与硫醇的反应速率取决于pH值和试剂浓度。NO释放的最大速率对应于1 mM范围内的硫醇浓度。根据反应动力学数据和分离出的产物,提出了一种反应机理。向牛主动脉内皮细胞添加2a导致强烈的NO释放,表明与内源性硫