Design, Synthesis, and Biochemical Evaluation of <i>N</i>-Substituted Maleimides as Inhibitors of Prostaglandin Endoperoxide Synthases
作者:Amit S. Kalgutkar、Brenda C. Crews、Lawrence J. Marnett
DOI:10.1021/jm950872p
日期:1996.1.1
N-(Carboxyalkyl)maleimides are rapid as well as time-dependent inhibitors of prostaglandin endoperoxide synthase (PGHS). The corresponding N-alkylmaleimides were only time-dependent inactivators of PGHS, suggesting that the carboxylate is critical for rapid inhibition. Several N-substituted maleimide analogs containing structural features similar to those of the nonsteroidal anti-inflammatory drug
N-(羧基烷基)马来酰亚胺是前列腺素内过氧化物合酶(PGHS)的快速抑制剂,也是时间依赖性抑制剂。相应的N-烷基马来酰亚胺仅是PGHS的时间依赖性灭活剂,表明羧酸盐对于快速抑制至关重要。合成了几种具有与非甾体抗炎药阿司匹林相似的结构特征的N-取代的马来酰亚胺类似物,并将其评估为PGHS的抑制剂。大多数类似阿司匹林的马来酰亚胺都以类似于阿司匹林的时间和浓度依赖性方式灭活纯化的绵羊PGHS-1的环氧合酶活性。PGHS的过氧化物酶活性也被马来酰亚胺类似物灭活。这些化合物也抑制了诱导型同功酶PGHS-2的环氧合酶活性。N-5-马来酰亚胺基-2-乙酰氧基-1-苯甲酸的相应琥珀酰亚胺类似物不抑制任何一种酶的活性,这表明失活是由于蛋白质的共价修饰。研究了N-(羧基庚基)马来酰亚胺对PGHS-1的抑制作用机理。将apoPGHS-1与2当量的N-(羧基庚基)[3,4-14C]马来酰亚胺一起孵育会导致蛋白