High-throughput identification of antibacterials against methicillin-resistant Staphylococcus aureus (MRSA) and the transglycosylase
作者:Ting-Jen Rachel Cheng、Ying-Ta Wu、Shih-Ting Yang、Kien-Hock Lo、Shao-Kang Chen、Yin-Hsuan Chen、Wen-I Huang、Chih-Hung Yuan、Chih-Wei Guo、Lin-Ya Huang、Kuo-Ting Chen、Hao-Wei Shih、Yih-Shyun E. Cheng、Wei-Chieh Cheng、Chi-Huey Wong
DOI:10.1016/j.bmc.2010.10.036
日期:2010.12
To identify new transglycosylase inhibitors with potent anti-methicillin-resistant Staphylococcus aureus (MRSA) activities, a high-throughput screening against Staphylococcus aureus was conducted to look for antibacterial cores in our 2 M compound library that consists of natural products, proprietary collection, and synthetic molecules. About 3600 hits were identified from the primary screening and the subsequent confirmation resulted in a total of 252 compounds in 84 clusters which showed anti-MRSA activities with MIC values as low as 0.1 mu g/ml. Subsequent screening targeting bacterial transglycosylase identified a salicylanilide-based core that inhibited the lipid II polymerization and the moenomycin-binding activities of transglycosylase. Among the collected analogues, potent inhibitors with the IC50 values below 10 mu M against transglycosylase were identified. The non-carbonhydrate scaffold reported in this study suggests a new direction for development of bacterial transglycosylase inhibitors. (C) 2010 Elsevier Ltd. All rights reserved.