The binding characteristics and orientation of a novel radioligand with distinct properties at 5-HT3A and 5-HT3AB receptors
作者:Andrew J. Thompson、Mark H.P. Verheij、Joost Verbeek、Albert D. Windhorst、Iwan J.P. de Esch、Sarah C.R. Lummis
DOI:10.1016/j.neuropharm.2014.08.008
日期:2014.11
VUF10166 (2-chloro-3-(4-methyl piperazin-1-yl)quinoxaline) is a ligand that binds with high affinity to 5-HT3 receptors. Here we synthesise [(3)H]VUF10166 and characterise its binding properties at 5-HT3A and 5-HT3AB receptors. At 5-HT3A receptors [(3)H]VUF10166 displayed saturable binding with a Kd of 0.18 nM. Kinetic measurements gave monophasic association (6.25 × 10(7) M(-1) min(-1)) and dissociation
VUF10166 (2-chloro-3-(4-methyl piperazin-1-yl)quinoxaline) 是一种与 5-HT3 受体具有高亲和力的配体。在这里,我们合成 [(3) H] VUF10166 并表征其在 5-HT3A 和 5-HT3AB 受体上的结合特性。在 5-HT3A 受体上,[(3)H]VUF10166 显示出饱和结合,Kd 为 0.18 nM。动力学测量给出了单相结合 (6.25 × 10(7) M(-1) min(-1)) 和解离 (0.01 min(-1)) 速率,产生了类似的 Kd 值 (0.16 nM)。在 5-HT3AB 受体上观察到两种结合 (6.15 × 10(-7), 7.23 M(-1) min(-1)) 和解离 (0.024, 0.162 min(-1)) 速率,产生 Kd 值 (0.38 nM和 22 nM),分别与在饱和 (Kd = 0