作者:Kunal Kumar、Divya Awasthi、Seung-Yub Lee、Jason E. Cummings、Susan E. Knudson、Richard A. Slayden、Iwao Ojima
DOI:10.1016/j.bmc.2013.02.059
日期:2013.6
Francisella tularensis is a highly virulent pathogenic bacterium. In order to identify novel potential antibacterial agents against F. tularensis, libraries of trisubstituted benzimidazoles were screened against F. tularensis LVS strain. In a preliminary screening assay, remarkably, 23 of 2,5,6- and 2,5,7-trisubstituted benzimidazoles showed excellent activity exhibiting greater than 90% growth inhibition at 1 mu g/mL. Among those hits, 21 compounds showed MIC90 values in the range of 0.35-48.6 mu g/mL after accurate MIC determination. In ex vivo efficacy assays, four of these compounds exhibited 2-3 log reduction in colony forming units (CFU) per mL at concentrations of 10 and 50 mu g/mL. (C) 2013 Elsevier Ltd. All rights reserved.