Synthesis and Evaluation of Analogues of the Partial Agonist 6-(Propyloxy)-4-(methoxymethyl)-β-carboline-3-carboxylic Acid Ethyl Ester (6-PBC) and the Full Agonist 6-(Benzyloxy)-4-(methoxymethyl)-β- carboline-3-carboxylic Acid Ethyl Ester (Zk 93423) at Wild Type and Recombinant GABA<sub>A</sub> Receptors
作者:Eric D. Cox、Hernando Diaz-Arauzo、Qi Huang、Mundla S. Reddy、Chunrong Ma、Brad Harris、Ruth McKernan、Phil Skolnick、James M. Cook
DOI:10.1021/jm970460b
日期:1998.7.1
A pharmacophore and an alignment rule have previously been reported for BzR agonist ligands. The design and synthesis of 6-(propyloxy)-4-(methoxymethyl)-beta-carboline-3-carboxylic acid ethyl ester (6-PBC, 24, IC50 = 8.1 nM) was based on this pharmacophore. When evaluated in vivo this ligand exhibited anticonvulsant/anxiolytic activity but was devoid of the muscle relaxant/ataxic effects of "classical"
以前已经报道了BzR激动剂配体的药效基团和比对规则。基于该药效基团的设计和合成6-(丙氧基)-4-(甲氧基甲基)-β-咔啉-3-羧酸乙酯(6-PBC,24,IC50 = 8.1 nM)。当在体内评估时,该配体表现出抗惊厥/抗焦虑活性,但是没有“经典的” 1,4-苯并二氮杂卓(即地西epa)的肌肉松弛/抗氧化剂作用。值得注意的是,6-PBC 24还逆转了地西epa诱导的小鼠肌肉松弛。合成并体外评估了6-PBC 24和Zk 93423 27(IC50 = 1 nM)的3-取代类似物40-46和48(IC50 = 1 nM),以确定这些修饰对重组BzR亚型的结合亲和力有什么影响。除了3-氨基配体40和41 发现所有β-咔啉在BzR位点均表现出高结合亲和力。还对体内的3-丙基醚衍生物45进行了评估,发现在最高40 mg / kg的剂量下,它没有任何前惊厥药或抗惊厥药的活性。合成了6-PBC 24的