2,4-Diaminopyrimidines as histamine H4 receptor ligands—Scaffold optimization and pharmacological characterization
作者:Kerstin Sander、Tim Kottke、Yusuf Tanrikulu、Ewgenij Proschak、Lilia Weizel、Erich H. Schneider、Roland Seifert、Gisbert Schneider、Holger Stark
DOI:10.1016/j.bmc.2009.08.059
日期:2009.10
The human histamine H-4 receptor (hH(4)R) is a promising new target in the therapy of inflammatory diseases and disorders of the immune system. For the development of new H4R antagonists a broad ligand-based virtual screening was performed resulting in two hits. The dissection of their common annelated aromatic core into its heteromonocyclic components showed that 2,4-diaminopyrimidine is a potent hH(4)R affinity scaffold, which was comprehensively investigated. Structure-activity relationship studies revealed that slight structural changes evoke extensive differences in functional activities and potencies: while o-and p-substituted benzyl amines mainly showed partial agonism, m-substituted and rigidified ones exhibited inverse agonist efficacy. (C) 2009 Elsevier Ltd. All rights reserved.