N-n-Alkylation of nicotine converts nicotine from an agonist into an antagonist specifically for neuronal nicotinic acetylcholine receptor subtypes mediating nicotine-evoked dopamine release. Conformationally restricted analogs exhibit both high affinity and selectivity at this site, and are able to access the brain due to their ability to act as substrates for the blood-brain barrier choline transporter.
尼古丁的N-n-烷基化将
尼古丁从激动剂转化为拮抗剂,特别是对于介导
尼古丁诱导的
多巴胺释放的神经
尼古丁乙酰胆碱受体亚型。构象限制类似物在该位点表现出高亲和力和选择性,并能够进入大脑,因为它们能够作为血脑屏障
胆碱转运体的底物。