Potent, Orally Active, Competitive N-Methyl-D-aspartate (NMDA) Receptor Antagonists Are Substrates for a Neutral Amino Acid Uptake System in Chinese Hamster Ovary Cells
作者:Jia-He Li、Christopher F. Bigge、Rufus M. Williamson、Susan A. Borosky、Mark G. Vartanian、Daniel F. Ortwine
DOI:10.1021/jm00011a015
日期:1995.5
R-configuration by being able to use a neutral amino acid uptake system to enhance both peripheral adsorption and transport into the brain. Examination in a system L neutral amino acid transport carrier assay shows that 1 competes with L-Phe for transport in an apparent competitive and stereospecific manner (estimated Ki = 50 microM). The 1- and 2-naphthyl derivatives 3a,3b were found to be among the most potent
制备了一系列与SDZ EAB 515(1)相关的对映体纯的(膦酰基甲基)取代的苯丙氨酸衍生物,作为竞争性N-甲基-D-天冬氨酸(NMDA)受体拮抗剂。与大多数已知的竞争性NMDA拮抗剂不同,该系列具有S构型的类似物是有效的NMDA拮抗剂,而具有非天然R构型的类似物是弱的NMDA拮抗剂,这是通过受体结合实验及其在小鼠中的抗惊厥作用确定的。在先前报道的竞争性NMDA药效团模型中进行的检验表明,受体亲和力可以部分通过容纳1的联苯环的腔体来解释,而R对映体2的联苯环延伸到不允许的空间区域。我们提出具有天然S-构型和较大疏水部分的类似物在体内比具有R-构型的类似物在体内具有优势,因为它能够使用中性氨基酸摄取系统来增强外周吸附和向大脑的转运。在系统L中性氨基酸转运载体测定中的检查显示1以明显的竞争性和立体特异性方式与L-Phe竞争转运(估计Ki = 50 microM)。发现1-和2-萘基衍生物3a,