Ketanserin analogs: structure-affinity relationships for 5-HT2 and 5-HT1C serotonin receptor binding
作者:Jeff L. Herndon、Abd Ismaiel、Stacy P. Ingher、M. Teitler、Richard A. Glennon
DOI:10.1021/jm00104a017
日期:1992.12
prototypic 5-HT2 serotonin antagonist; although it has been an important tool for the study of serotonin pharmacology, it has had relatively little impact on drug design because remarkably little is known about its structure-affinity relationships. Furthermore, ketanserin also binds at 5-HT1C receptors and even less is known about the influence of its structural features on 5-HT1C receptor affinity. The present
酮色林是原型5-HT2血清素拮抗剂。尽管它一直是研究5-羟色胺药理学的重要工具,但它对药物设计的影响相对较小,因为对其结构亲和性关系知之甚少。此外,酮色林还与5-HT1C受体结合,对其结构特征对5-HT1C受体亲和力的影响知之甚少。本研究表明,酮色林的4-氟苯甲酰基部分的氟和羰基对5-HT2结合的贡献很小,完整的苯甲酰基哌啶部分是重要的特征。哌啶环的开环降低了亲和力。尽管喹唑啉-2,4-二酮部分也有助于结合,它似乎起着较小的作用,并且可以通过保留5-HT2亲和力在结构上简化。例如,N-(4-苯基丁基)-4-(4-氟苯甲酰基)哌啶(39)以与酮色林(Ki = 3.5 nM)几乎相同的亲和力(Ki = 5.3 nM)结合。所有检测到的化合物在5-HT1C位点的结合亲和力均比酮色林低,某些简化的类似物以5-HT2C结合酮色林的5-HT1C选择性结合近十倍。但是,没有显示> 120倍的选择性。