Structure−Activity Relationships of 4-Hydroxy-3-nitroquinolin-2(1<i>H</i>)-ones as Novel Antagonists at the Glycine Site of <i>N</i>-Methyl-<scp>d</scp>-aspartate Receptors
作者:Sui Xiong Cai、Zhang-Lin Zhou、Jin-Cheng Huang、Edward R. Whittemore、Zizi O. Egbuwoku、Jon E. Hawkinson、Richard M. Woodward、Eckard Weber、John F. W. Keana
DOI:10.1021/jm960520y
日期:1996.1.1
4-hydroxy-3-nitroquinolin-2(1H)-ones (HNQs) was synthesized by nitration of the corresponding 2,4-quinolinediols. The HNQs were evaluated as antagonists at the glycine site of NMDA receptors by inhibition of [3H]DCKA binding to rat brain membranes. Selected HNQs were also tested for functional antagonism by electrophysiological assays in Xenopus oocytes expressing either 1a/2C subunits of NMDA receptors or rat brain
通过硝化相应的2,4-喹啉二醇合成了一系列的4-羟基-3-硝基喹啉-2(1H)-酮(HNQs)。通过抑制[3H] DCKA与大鼠脑膜的结合,将HNQs评估为NMDA受体甘氨酸位点的拮抗剂。还通过在表达NMDA受体或大鼠脑AMPA受体的1a / 2C亚基的非洲爪蟾卵母细胞中通过电生理测定法测试了选定的HNQs的功能拮抗作用。HNQs的结构-活性关系(SAR)显示,通常在5、6和7位上的取代会增加效力,而在8位上的取代会导致效力急剧下降。在测试的HNQ中,5,6,7-三氯HNQ(8i)是最有效的拮抗剂,在[3H] DCKA结合测定中的IC50为220 nM,从电生理测定中得出的Kb为79 nM。在稳态条件下测量,HNQ 8i对NMDA的选择性是AMPA受体的240倍。将HNQs的SAR与1,4-二氢喹喔啉-2,3-二酮(QXs)和1,2,3,4-四氢喹啉-2,3,4-三酮3-肟(QTOs)的S