2-Phenyl-imidazo[1,2-<i>a</i>]pyridine Compounds Containing Hydrophilic Groups as Potent and Selective Ligands for Peripheral Benzodiazepine Receptors: Synthesis, Binding Affinity and Electrophysiological Studies
作者:Nunzio Denora、Valentino Laquintana、Maria Giuseppina Pisu、Riccardo Dore、Luca Murru、Andrea Latrofa、Giuseppe Trapani、Enrico Sanna
DOI:10.1021/jm8006728
日期:2008.11.13
GABA A receptors. The capability of flumazenil to reduce the stimulatory effect exerted by compound 9 supports the conclusion that the modulatory effects of the examined compounds occur involving the CBR. The ability of compound 16 to increase GABA A receptor-mediated miniature inhibitory postsynaptic currents in CA1 pyramidal neurons is indicative of its ability to stimulate the local synthesis and secretion
合成了一系列咪唑并吡啶乙酰胺,以评估中枢(CBR)和周围苯并二氮杂receptor受体(PBR)的结构变化的影响。这些变化包括在咪唑并吡啶骨架的2位和8位引入极性取代基或可电离的官能团。结果表明,在苯环的对位具有氢键受体和/或供体性质的取代基导致对PBR的高亲和力。在电生理研究中,发现化合物9、12、13和28显着增强了表达α1β2γ2 GABA A受体的非洲爪蟾卵母细胞中GABA诱发的Cl(-)电流。氟马西尼降低化合物9施加的刺激作用的能力支持以下结论:所检测化合物的调节作用涉及CBR。化合物16增加CA1锥体神经元中GABA A受体介导的微型抑制性突触后电流的能力表明其刺激神经甾体的局部合成和分泌的能力。