Identification, Synthesis, and Characterization of a Unique Class of N-Methyl-D-aspartate Antagonists. The 6,11-Ethanobenzo[b]quinolizinium Cation
作者:John P. Mallamo、William G. Earley、Virendra Kumar、Chakrapani Subramanyam、John A. Jr. Dority、Matthew S. Miller、Diane L. DeHaven-Hudkins、Brian Ault、John L. Herrmann
DOI:10.1021/jm00052a003
日期:1994.12
A series of novel N-methyl-D-aspartate antagonists acting at the phencyclidine site has been identified. Compound 2 has a Ki = 8 +/- 1 nM (vs [3H]thienylcyclidine, [3H]TCP) as a mixture of enantiomers. Resolution and further testing indicate that (-)-2, Ki = 4 +/- 0.7 nM, is a potent and selective TCP site ligand with neuroprotective activity in cultured neurons in the presence of excitotoxic concentrations
已经鉴定了一系列作用于苯环利定位点的新型N-甲基-D-天冬氨酸拮抗剂。化合物2具有Ki = 8 +/- 1nM(相对于[3H]噻吩基环啶,[3H] TCP)对映异构体的混合物。分辨率和进一步测试表明,(-)-2(Ki = 4 +/- 0.7 nM)是一种有效且选择性的TCP位点配体,在存在兴奋毒性浓度的NMDA(IC50 = 26 nM)的情况下,对培养的神经元具有神经保护活性。相对于包括鸦片,肾上腺素,5-羟色胺能,多巴胺,腺苷,二氢吡啶和苯并二氮杂a在内的一系列受体类型,化合物(-)-2对TCP位置的选择性> 1000倍,并且对活化的(开放的)NMDA受体具有更高的选择性。离子通道复合物与PCP和MK801的关系,可通过培养的电压钳制神经元中的贴片记录进行测量。高度增强的“开放渠道” 选择性导致这些配体的初步分类为与NMDA不竞争。具有这些特征的配体可以使与典型的非竞争性NMDA拮抗剂