Kynurenic acid derivatives. Structure-activity relationships for excitatory amino acid antagonism and identification of potent and selective antagonists at the glycine site on the N-methyl-D-aspartate receptor
作者:Paul D. Leeson、Raymond Baker、Robert W. Carling、Neil R. Curtis、Kevin W. Moore、Brian J. Williams、Alan C. Foster、Angus E. Donald、John A. Kemp、George R. Marshall
DOI:10.1021/jm00108a002
日期:1991.4
Derivatives of the nonselective excitatory amino acid antagonist kynurenic acid (4-oxo-1,4-dihydroquinoline-2-carboxylic acid, 1) have been synthesized and evaluated for in vitro antagonist activity at the excitatory amino acid receptors sensitive to N-methyl-D-aspartic acid (NMDA), quisqualic acid (QUIS or AMPA), and kainic acid (KA). Introduction of substituents at the 5-, 7-, and 5,7-positions resulted
已合成了非选择性兴奋性氨基酸拮抗剂犬尿苷酸(4-oxo-1,4-dihydroquinoline-2-acid,1)的衍生物,并评估了对N-甲基-敏感的兴奋性氨基酸受体的体外拮抗剂活性D-天门冬氨酸(NMDA),准角鲨酸(QUIS或AMPA)和海藻酸(KA)。在5-,7-和5,7-位上引入取代基导致了具有选择性NMDA拮抗剂作用的类似物,这是由于NMDA受体上的甘氨酸调节(或辅酶)位点被阻断。回归分析表明需要最佳尺寸的疏水性5位和7位取代基,在5位上的体积容忍度更大。优化产生了5-碘-7-氯衍生物(53),这是迄今为止最有效和选择性最高的甘氨酸/ NMDA拮抗剂(IC50与[3H]甘氨酸结合,32 nM;其他兴奋性氨基酸受体位点的IC50大于100 microM)。在6位上取代1会导致化合物具有选择性的非NMDA拮抗作用,而8位取代的化合物对所有受体均无活性。甘氨酸/ NMDA拮抗剂活性在