文献类型：期刊文献

英文题名：The effect of sublethal concentrations of benzalkonium chloride on the LuxS/AI-2 quorum sensing system, biofilm formation and motility of Escherichia coli

作者：Yu, Tao[1,2];Ma, Muyuan[3];Sun, Yaxi[1];Xu, Xiaobo[1];Qiu, Shuxing[1,2];Yin, Junlei[1,2];Chen, Leishan[1]

第一作者：Yu, Tao

通讯作者：Chen, LS[1]

机构：[1]Xinxiang Univ, Sch Life Sci & Basic Med, Xinxiang 453000, Henan, Peoples R China;[2]Key Lab Biomed & Hlth Risk Warning Xinxiang City, Xinxiang 453000, Henan, Peoples R China;[3]Xian Jiaotong Liverpool Univ, Dept Biol Sci, Suzhou 215123, Jiangsu, Peoples R China

第一机构：新乡学院

通讯机构：[1]corresponding author), Xinxiang Univ, Sch Life Sci & Basic Med, Xinxiang 453000, Henan, Peoples R China.|[11071]新乡学院;

年份：2021

卷号：353

外文期刊名：INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY

收录：;Scopus(收录号：2-s2.0-85108406121);WOS:【SCI-EXPANDED(收录号:WOS:000679976100006)】；

基金：This work was supported by the Natural Science Foundation of Henan Province (202300410018) and the Key Project of Natural Science of the Education Department of Henan Province (20A180027).

语种：英文

外文关键词：Escherichia coli; Benzalkonium chloride; LuxS; AI-2; Quorum sensing; Biofilm formation

摘要：Escherichia coli can survive improper disinfection processes, which is a potential source of contamination of food products. Benzalkonium chloride (BC) is a common disinfectant widely used in food industry. Bacterial quorum sensing (QS) plays a major role in food spoilage, biofilm formation and food-related pathogenesis. Understanding QS can help to control the growth of undesirable food-related bacteria. The LuxS/AI-2 QS system of E. coli has been confirmed to regulate many important phenotypes including biofilm formation and motility. In the current study, we aimed to investigate the effect of sublethal concentrations of BC on the LuxS/AI-2 system of E. coli isolates from retail meat samples, as well as bacterial biofilm formation and motility. Our results showed that sublethal concentrations of BC promoted AI-2 production in four test E. coli isolates. The results from microplate assay and confocal laser scanning microscopy (CLSM) analysis indicated that sublethal concentrations of BC enhanced biofilm formation of E. coli. When treated with sublethal concentrations of BC, exopolysaccharides (EPS) production during biofilm development increased significantly and swimming motility of tested isolates was also promoted. The expression levels of luxS, biofilm-associated genes and flagellar motility genes were increased by BC at sublethal concentrations. Our findings underline the importance of proper use of the disinfectant BC in food processing environments to control food contamination by E. coli.