Structure−Activity Relationships in a Series of Orally Active γ-Hydroxy Butenolide Endothelin Antagonists
作者:William C. Patt、Jeremy J. Edmunds、Joseph T. Repine、Kent A. Berryman、Billy R. Reisdorph、Chet Lee、Mark S. Plummer、Aurash Shahripour、Stephen J. Haleen、Joan A. Keiser、Mike A. Flynn、Kathleen M. Welch、Elwood E. Reynolds、Ron Rubin、Brian Tobias、Hussein Hallak、Annette M. Doherty
DOI:10.1021/jm9606507
日期:1997.3.1
to the subnanomolar ETA selective antagonist PD156707, IC50's = 0.3 (ET(A)) and 780 nM (ET(B)). This series of compounds exhibited functional activity exemplified by PD156707. This derivative inhibited the ETA receptor mediated release of arachidonic acid from rabbit renal artery vascular smooth muscle cells with an IC50 = 1.1 nM and also inhibited the ET-1 induced contraction of rabbit femoral artery
设计有效的和选择性的内皮素-1(ET-1)及其相关异肽类非肽拮抗剂是确定ET在人类疾病中的作用的重要工具。在本报告中,我们将描述详细的结构-活性关系(SAR)研究,该研究导致发现了一系列有效的丁烯内酯ETA选择拮抗剂。从微摩尔筛选产物PD012527开始,使用Topliss决策树分析导致发现纳摩尔ET(A)选择性拮抗剂PD155080。丁烯内酯环周围的进一步结构修饰直接导致了亚纳摩尔ETA选择性拮抗剂PD156707,IC50 = 0.3(ET(A))和780 nM(ET(B))。该系列化合物表现出以PD156707为例的功能活性。该衍生物抑制ETA受体介导的花生四烯酸从兔肾动脉血管平滑肌细胞中释放,IC50 = 1.1 nM,并且还抑制ET-1诱导的兔股动脉环收缩(ETA介导),pA2 = 7.6。PD156707还显示出体内功能活性,该活性功能抑制了大鼠以剂量依赖方式外源给予ET-1引