New Selective Inhibitors of Steroid 11β-Hydroxylation in the Adrenal Cortex. Synthesis and Structure–Activity Relationship of Potent Etomidate Analogues
作者:Ilse M. Zolle、Michael L. Berger、Friedrich Hammerschmidt、Stefanie Hahner、Andreas Schirbel、Biljana Peric-Simov
DOI:10.1021/jm800012w
日期:2008.4.1
functionalized MTO analogues. Our results indicated that (1) ( R)-configuration is essential for high affinity, (2) highest potency resides in the ethyl, 2-propyl, and 2-fluoroethyl esters, and (3) substitution of the phenyl ring is well tolerated. The clinically used inhibitors metyrapone and ketoconazole inhibited (131)I-IMTO binding with low affinity. Incubation of selected analogues with human adrenocortical
依托咪酯的衍生物被评估为肾上腺类固醇11β-羟基化的抑制剂。Mitsunobu的立体选择性偶联产生了手性纯的类似物,以研究酯的构型,修饰和苯环中的取代作用,目的是探查引入放射性核素的特定位点。标记有碘131的碘代乙二胺碘酸盐(IMTO)用作放射性配体,用于结构亲和关系研究。我们已经表征了大鼠肾上腺膜上特异性(131)I-IMTO结合的动力学参数,并使用(131)I-IMTO结合的置换来评估功能化的MTO类似物。我们的结果表明,(1)(R)-构型对于高亲和力至关重要,(2)最高效力在于乙基,2-丙基和2-氟乙基酯,(3)对苯环的取代具有良好的耐受性。临床上使用的抑制剂甲吡酮和酮康唑以低亲和力抑制(131)I-IMTO结合。选定的类似物与人肾上腺皮质NCI-h295细胞的孵育表明与对皮质醇分泌的抑制作用高度相关。