Synthesis, Nicotinic Acetylcholine Receptor Binding, and Antinociceptive Properties of 3‘-Substituted Deschloroepibatidine Analogues. Novel Nicotinic Antagonists
作者:F. Ivy Carroll、Wei Ma、Yasuno Yokota、Jeffrey R. Lee、Lawrence E. Brieaddy、Hernán A. Navarro、M. I. Damaj、Billy R. Martin
DOI:10.1021/jm040160b
日期:2005.2.1
respectively. These results suggest that these compounds will be highly useful for identifying which specific receptor subtypes are involved in each of nicotine's pharmacological effects. The high affinity of the N-methyl-3'-iodo analogue 4 combined with its weak agonist and potent antagonist activity suggests that carbon-11 and iodine-123 analogues may be useful as PET and SPECT ligands, respectively
一系列3'-取代的deschloroepibatidine类似物(3a-g和4)显示出对alpha4beta2结合的高亲和力和对alpha7 nAChRs的相对弱的亲和力。最有效的分别是K(i)值为0.02和0.037 nM的3'-乙炔基(3g)和3'-氟(3a)类似物。即使几种类似物的alpha4beta2结合亲和力与Epibatidine相同,但在小鼠的抗伤害感受,体温过低和自发活性测试中,所有化合物均为弱激动剂。相反,所有化合物都是尼古丁诱导的抗伤害感受的功能性拮抗剂。通常,化合物3a-g和4在甩尾试验中比热板试验更有效。例如,3'-氟类似物3a和N-甲基-3'-碘类似物4的AD(50)值为0.07和0.04 microg / kg,分别在甩尾试验中和在热板试验中分别在20和10 microg / kg下只有35%和0%抑制。这些结果表明,这些化合物对于鉴定每种尼古丁的药理作用涉及哪