Excitatory amino acid receptor ligands. Synthesis and biological activity of 3-isoxazolol amino acids structurally related to homoibotenic acid
作者:Inge T. Christensen、Bjarke Ebert、Ulf Madsen、Birgitte Nielsen、Lotte Brehm、Povl Krogsgaard-Larsen
DOI:10.1021/jm00097a008
日期:1992.9
but turned out to be a weak N-methyl-D-aspartic acid (NMDA) receptor antagonist. However, like 4c,e, 4d did not significantly affect the binding of the competitive NMDA antagonist, [3H]CPP, or the noncompetitive NMDA antagonist, [3H]MK-801. None of the amino acids 4c-e showed detectable affinity for [3H]kainic acid binding sites. Like the parent compound 4a (IC50 = 0.18 microM), 4c (IC50 = 0.18 microM)
3-异x唑氨基酸(RS)-2-氨基-3-(3-羟基-5-甲基异iso唑-4-基)丙酸(AMPA,2)和异构体化合物(RS)-2-氨基-3- (3-羟基-4-甲基异恶唑基-5-基)丙酸(4-甲基高同戊二酸,4a)是中央兴奋性氨基酸受体AMPA亚型的强效激动剂。使用4a作为前导结构,合成了氨基酸4c-e,其中4a的4-甲基被不同大小和极性的取代基取代。尝试合成潜在的受体烷基化剂4-(溴甲基)高同戊烯酸(4f)失败。4-丁基同高硼酸(4c)和4-(2-羟乙基)同高硼酸(4e)等价地作为[3H] AMPA结合抑制剂(IC50 = 2 microM),并在大鼠皮层切片制备中显示出相似的兴奋性。4d没有显示出对AMPA受体位点的显着亲和力,但是证明是弱的N-甲基-D-天冬氨酸(NMDA)受体拮抗剂。但是,与4c,e一样,4d不会显着影响竞争性NMDA拮抗剂[3H] CPP或非竞争性NMDA拮抗剂[3H]