Prodrugs of Nitroxyl as Potential Aldehyde Dehydrogenase Inhibitors vis-a-vis Vascular Smooth Muscle Relaxants
作者:Herbert T. Nagasawa、Sagar P. Kawle、James A. Elberling、Eugene G. DeMaster、Jon M. Fukuto
DOI:10.1021/jm00011a005
日期:1995.5
one 1,1-dioxide), a nitroxyl prodrug, are described. When treated with 0.1 M aqueous NaOH, 1 liberated nitroxyl (HN=O), a known inhibitor of aldehyde dehydrogenase (AlDH), in a time-dependent manner. Nitroxyl was measured gas chromatographically as its dimerization/dehydration product N2O. Under these conditions, Piloty's acid (benzenesulfohydroxamic acid) also gave rise to HNO. However, whereas Piloty's
描述了N-羟基糖精(1)(2-羟基-1,2-苯并噻唑-3(2H)-1,1-二氧化物)(一种硝酰基的前药)的合成及其化学/生物学性质。当用0.1 M NaOH水溶液处理时,会随时间变化释放1种释放出的硝酰(HN = O),一种已知的醛脱氢酶(AlDH)抑制剂。气相色谱法测定硝基二甲苯的二聚/脱水产物N2O。在这些条件下,Piloty的酸(苯磺基异羟肟酸)也产生了HNO。然而,尽管Piloty酸在生理磷酸盐缓冲液(pH 7.4)中孵育时会释放出有限量的硝酰,但由1生成的硝酰极少。这反映在酵母AlDH的差异抑制上(IC50 = 48且> 1000 microM)和预先收缩的兔主动脉环在体外的微分松弛(EC50 = 1.03和14.0 microM)是由Piloty酸和1引起的。1种的O-乙酰基衍生物,即N-乙酰氧基糖精(13a),在两种测定中的活性都低得多。结论是,N-羟基糖精(1)在生理pH值