Development of a high affinity and stereoselective photoaffinity label for the D-1 dopamine receptor: synthesis and resolution of 7-[125I]iodo-8-hydroxy-3-methyl-1-(4'-azidophenyl)-2,3,4,5-tetrahydro-1H-3-benzazepine
作者:John L. Neumeyer、Nandkishore Baindur、Jun Yuan、Gillian Booth、Phillip Seeman、Hyman B. Niznik
DOI:10.1021/jm00164a009
日期:1990.2
-1-(4'-azidophenyl)-2,3,4,5-tetrahydro- 1H-3-benzazepine (I-MAB) and its 125I analogue ([125I]I-MAB) as selective, high affinity photoaffinity labels for the D-1 dopamine receptor. In this report, we now describe the complete synthesis and resolution of I-MAB and the pharmacological characterization of the stereoisomers in canine striatal membranes. R-(+)-I-MAB showed highly specific dopamine D-1 receptor
在较早的论文中,我们报道了(+-)-7-iodo-8-hydroxy-3-methyl-1-(4'-azidophenyl)-2,3,4,5-tetrahydro-1H-3-的开发苯并ze庚因(I-MAB)及其125I类似物([125I] I-MAB)作为D-1多巴胺受体的选择性,高亲和力光亲和标记。在这份报告中,我们现在描述犬纹状体膜中I-MAB的完整合成和拆分以及立体异构体的药理特性。R-(+)-I-MAB显示出高度特异性的多巴胺D-1受体结合(KD = 0.28 nM),并选择性和立体选择性地与D-1受体结合。这些结果进一步证实了先前的建议,即在苯并ze庚因系列的DA激动剂和拮抗剂中,活性主要存在于R-(+)对映异构体中,S-(-)对映异构体的效力或活性大大降低。此外,R-(+)-[125I] I-MAB 经光解后,鉴定神经元D-1受体的配体结合亚基,十二烷基硫酸钠-聚丙烯酰胺凝胶电