Creating Novel Activated Factor XI Inhibitors through Fragment Based Lead Generation and Structure Aided Drug Design
作者:Ola Fjellström、Sibel Akkaya、Hans-Georg Beisel、Per-Olof Eriksson、Karl Erixon、David Gustafsson、Ulrik Jurva、Daiwu Kang、David Karis、Wolfgang Knecht、Viveca Nerme、Ingemar Nilsson、Thomas Olsson、Alma Redzic、Robert Roth、Jenny Sandmark、Anna Tigerström、Linda Öster
DOI:10.1371/journal.pone.0113705
日期:——
Activated factor XI (FXIa) inhibitors are anticipated to combine anticoagulant and profibrinolytic effects with a low bleeding risk. This motivated a structure aided fragment based lead generation campaign to create novel FXIa inhibitor leads. A virtual screen, based on docking experiments, was performed to generate a FXIa targeted fragment library for an NMR screen that resulted in the identification
预计活化因子XI(FXIa)抑制剂将抗凝和纤溶作用结合在一起,出血风险低。这激发了基于结构辅助片段的线索生成活动,以创建新颖的FXIa抑制剂线索。基于对接实验,进行了虚拟筛选以生成用于NMR筛选的FXIa靶向片段文库,从而鉴定了FXIa S1结合口袋中结合的片段。中性的6-氯-3,4-二氢-1H-喹啉-2-酮和弱碱性的喹啉-2-胺结构是新颖的FXIa P1片段。这些片段向FXIa主键结合位点的扩展通过解决已报道的FXIa抑制剂的X射线结构而得以帮助,我们发现该XXI抑制剂在S1-S1'-S2'FXIa结合口袋中结合。将鉴定出的结合了S1的6-氯-3,4-二氢-1H-喹啉-2-酮片段和结合了S1-S1'-S2'的参考化合物的X射线结构信息结合在一起,即可进行结构指导的连接和扩展用1.0 nM的FXIa IC50达到迄今为止报道的最有效和选择性的FXIa抑制剂之一。有效的S1-S1'-S2'结