In order to map out molecular determinants for the competitive blockade of AMPA receptor subtypes, a series of racemic aryl-substituted phenylalanines was synthesized and pharmacologically characterized in vitro at native rat ionotropic glutamate receptors. Most of the compounds showed micromolar affinity and preference for AMPA receptors. Individual stereoisomers of selected compounds were further
为了确定竞争性阻断
AMPA受体亚型的分子决定因素,合成了一系列外消旋的芳基取代的苯丙
氨酸,并在体外对天然大鼠离子型谷
氨酸受体进行了药理学表征。大多数化合物对
AMPA受体表现出微摩尔亲和力和偏爱性。在
重组同源鼠GluA2和GluA3受体上进一步评估了所选化合物的各个立体异构体。最有效的化合物(-)-2-
氨基-3-(6-
氯-2',5'-二羟基-5-硝基-[1,1'-
联苯] -3-基)
丙酸发现GluA2亚型的K i为1.71μM的R异构体竞争性拮抗GluA2(Q)iTE
VC电生理实验中的受体(K b = 2.13μM )。分子对接实验使我们能够比较GluA2结合核心上合成的苯丙
氨酸的两种替代拮抗剂结合模式,显示了进一步结构修饰的方向。