Synthesis and Biological Evaluation of 4-(Aminomethyl)-1-hydroxypyrazole Analogues of Muscimol as γ-Aminobutyric Acid<sub>A</sub> Receptor Agonists
作者:Jette G. Petersen、Rikke Bergmann、Henriette A. Møller、Charlotte G. Jørgensen、Birgitte Nielsen、Jan Kehler、Karla Frydenvang、Jesper Kristensen、Thomas Balle、Anders A. Jensen、Uffe Kristiansen、Bente Frølund
DOI:10.1021/jm301473k
日期:2013.2.14
A series of bioisosteric 4-(aminomethyl)-1-hydroxypyrazole (4-AHP) analogues of muscimol, a GABAA receptor agonist, has been synthesized and pharmacologically characterized at native and selected recombinant GABAA receptors. The unsubstituted 4-AHP analogue (2a) (EC50 19 μM, Rmax 69%) was a moderately potent agonist at human α1β2γ2 GABAA receptors, and in SAR studies substitutions in the 3- and/or
muscimol(一种GABA A受体激动剂)的一系列生物等位4-(氨基甲基)-1-羟基吡唑(4-AHP)类似物已经合成,并在天然和选定的重组GABA A受体上进行了药理学表征。未取代的4- AHP类似物(2A)(EC 50 19μM,- [R最大69%)中,在人的适度有效激动剂α 1 β 2 γ 2种GABA甲受体,和在SAR在3-和/或5-取代的研究发现-位置不利于结合亲和力。在α配体-受体对接1 β 2 γ 2 GABA甲受体同源性模型以及获得的SAR表明2a和muscimol具有相同的结合模式,这与基于4-(piperidin-4-yl)-1-hydroxypyrazole(4-PHP ,1)。选择性α 1 β 2 γ 2比ρ 1 GABA甲观察为5-氯,5-溴受体和5-甲基取代的类似物,图2a示出,即使在结构的微小差别会引起亚型选择性。