Time-dependent slowly-reversible inhibition of monoamine oxidase A by N-substituted 1,2,3,6-tetrahydropyridines
作者:Wisut Wichitnithad、James P. O’Callaghan、Diane B. Miller、Brian C. Train、Patrick S. Callery
DOI:10.1016/j.bmc.2011.10.038
日期:2011.12
oxidase A inhibition. Eleven structurally similar tetrahydropyridine derivatives were synthesized and evaluated as inhibitors of MAO-A and MAO-B. The most potent MAO-A inhibitor in the series, 2,4-dichlorophenoxypropyl analog 12, displayed time-dependent mixed noncompetitive inhibition. The inhibition was reversed by dialysis, indicating reversible enzyme inhibition. Evidence that the slow-binding inhibition
发现一类新型的N-取代的四氢吡啶衍生物具有单胺氧化酶A抑制的多种动力学机制。合成了十一种结构相似的四氢吡啶衍生物,并将其评估为MAO-A和MAO-B的抑制剂。该系列中最有效的MAO-A抑制剂2,4-二氯苯氧基丙基类似物12显示出时间依赖性混合非竞争性抑制作用。通过透析逆转抑制,表明可逆酶抑制。有证据表明MAO-A与12具有缓慢结合抑制作用涉及通过用硼氢化钠还原来稳定共价可逆中间产物而获得的共价键。还原的酶复合物不可通过透析逆转。结果与缓慢可逆的基于机制的抑制作用相一致。选择性抑制MAO-A的两个四氢吡啶类似物的特征在于其动力学机理不同于12的动力学机理。作为MAO-A的可逆抑制剂,四氢吡啶类似物处于酪胺引起的高血压不良反应的低风险中。