Synthesis and Structure−Activity Relationships of 1,2,3,4-Tetrahydroquinoline-2,3,4-trione 3-Oximes: Novel and Highly Potent Antagonists for NMDA Receptor Glycine Site
作者:Sui Xiong Cai、Zhang-Lin Zhou、Jin-Cheng Huang、Edward R. Whittemore、Zizi O. Egbuwoku、Yixin Lü、Jon E. Hawkinson、Richard M. Woodward、Eckard Weber、John F. W. Keana
DOI:10.1021/jm960214k
日期:1996.1.1
(QTOs) was synthesized and evaluated for antagonism of NMDA receptor glycine site. Glycine site affinity was determined using a [3H]DCKA binding assay in rat brain membranes and electrophysiologically in Xenopus oocytes expressing 1a/2C subunits of cloned rat NMDA receptors. Selected compounds were also assayed for antagonism of AMPA receptors in Xenopus oocytes expressing rat brain poly-(A)+RNA. QTOs
合成了一系列的1,2,3,4-四氢喹啉-2,3,4-三酮3-肟(QTO),并评估了其对NMDA受体甘氨酸位点的拮抗作用。使用[3H] DCKA结合测定法在大鼠脑膜中和在表达克隆的大鼠NMDA受体1a / 2C亚基的非洲爪蟾卵母细胞中通过电生理学测定甘氨酸位点亲和力。还分析了所选化合物对表达大鼠脑聚-(A)+ RNA的爪蟾卵母细胞中AMPA受体的拮抗作用。通过将2,4-喹啉二醇亚硝化来制备QTO。结构活性研究表明,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降低。在评估的衍生工具中,有5,6,7-trichloro-QTO是最有效的拮抗剂,在[3H] DCKA结合试验中,IC50为7 nM,非洲爪蟾卵母细胞中表达的NMDA受体的Kb为1-2 nM。在电生理测定中,5,6,7-Trichloro-QTO对AMPA受体的Kb也为180 nM。将QTO的SAR与1,4-二氢喹喔啉-2