Structure-activity relationships of imidazothiazinones and analogs as antagonists of the cannabinoid-activated orphan G protein-coupled receptor GPR18
作者:Clara T. Schoeder、Maria Kaleta、Andhika B. Mahardhika、Agnieszka Olejarz-Maciej、Dorota Łażewska、Katarzyna Kieć-Kononowicz、Christa E. Müller
DOI:10.1016/j.ejmech.2018.05.050
日期:2018.7
is a cannabinoid-activated orphan G protein-coupled receptor (GPCR) that is selectively expressed on immune cells. Despite its significant potential as a drug target for inflammatory diseases and cancer immunotherapy, only very few GPR18 ligands have been described to date. In the present study we investigated the structure-activity relationships (SARs) of (Z)-2-(3-(4-chlorobenzyloxy)benzylidene)-6
GPR18是一种大麻素激活的孤儿G蛋白偶联受体(GPCR),在免疫细胞上选择性表达。尽管其作为炎性疾病和癌症免疫疗法的药物靶标具有巨大潜力,但迄今为止仅描述了极少的GPR18配体。在本研究中,我们研究了(Z)-2-(3-(4-氯苄氧基)亚苄基)-6,7-二氢-2 H-咪唑并[2,1-b] [ 1,3]噻嗪-3(5 ħ) -酮(PSB-CB5,5),是迄今为止描述的最有效的GPR18拮抗剂。合成的类似物表现出对杂环核心的广泛修饰和/或在亚苄基部分的取代基的变化。在β-arrestin募集试验中研究了这些化合物作为四氢大麻酚(THC)激活人GPR18的抑制剂。评估了针对大麻素受体(CB 1和CB 2)和针对GPR55(与大麻素相互作用的另一种孤儿GPCR)的选择性。具有长烷基链(最佳长度:六亚甲基)的苯氧基烷氧基取代的亚苄基亚嗪酮有效地封闭了GPR18,具有与铅结构5相似的高效力。(Z)-2-