(Z)-4-Bromo-5-(bromomethylene)-3-methylfuran-2(5H)-one sensitizes Escherichia coli persister cells to antibiotics

作者：Pan Jiachuan; Xie Xin; Tian Wang; Bahar Ali Adem; Lin Nan; Song Fangchao; An Jing; Ren Dacheng^*

来源：Applied Microbiology and Biotechnology, 2013, 97(20): 9145-9154.

DOI：10.1007/s00253-013-5185-2

• Antibiotic tolerance
• Persister
• Quorum sensing
• Inhibition
• Biofilm

Persisters are a small subpopulation of bacterial cells that are dormant and extremely tolerant to antibiotics. The intrinsic antibiotic tolerance of persisters also facilitates the development of multidrug resistance through acquired mechanisms based on drug resistance genes. In this study, we demonstrate that (Z)-4-bromo-5-(bromomethylene)-3-methylfuran-2(5H)-one (BF8) can reduce persistence during Escherichia coli growth and revert the antibiotic tolerance of its persister cells. The effects of BF8 were more profound when the pH was increased from 6 to 8.5. Although BF8 is a quorum sensing (QS) inhibitor, similar effects were observed for the wild-type E. coli RP437 and its Delta luxS mutant, suggesting that these effects did not occur solely through inhibition of AI-2-mediated QS. In addition to its effects on planktonic persisters, BF8 was also found to disperse RP437 biofilms and to render associated cells more sensitive to ofloxacin. At the doses that are effective against E. coli persister cells, BF8 appeared to be safe to the tested normal mammalian cells in vitro and exhibited no long-term cytotoxicity to normal mouse tissues in vivo. These findings broadened the activities of brominated furanones and shed new light on persister control.

• 出版日期2013-10
• 单位辽宁大学