Thiophenone attenuates enteropathogenic Escherichia coli O103:H2 Virulence by interfering with AI-2 signaling
PLoS ONE, ISSN: 1932-6203, Vol: 11, Issue: 6, Page: e0157334
2016
- 8Citations
- 30Captures
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Metrics Details
- Citations8
- Citation Indexes8
- Captures30
- Readers30
- 30
Article Description
Interference with bacterial quorum sensing communication provides an anti-virulence strategy to control pathogenic bacteria. Here, using the Enteropathogenic E. coli (EPEC) O103: H2, we showed for the first time that thiophenone TF101 reduced expression of lsrB; the gene encoding the AI-2 receptor. Combined results of transcriptional and phenotypic analyses suggested that TF101 interfere with AI-2 signalling, possibly by competing with AI-2 for binding to LsrB. This is supported by in silico docking prediction of thiophenone TF101 in the LsrB pocket. Transcriptional analyses furthermore showed that thiophenone TF101 interfered with expression of the virulence genes eae and fimH. In addition, TF101 reduced AI-2 induced E. coli adhesion to colorectal adenocarcinoma cells. TF101, on the other hand, did not affect epinephrine or norepinephrine enhanced E. coli adhesion. Overall, our results showed that thiophenone TF101 interfered with virulence expression in E. coli O103:H2, suggestedly by interfering with AI-2 mediated quorum sensing. We thus conclude that thiophenone TF101 might represent a promising future anti-virulence agent in the fight against pathogenic E. coli.
Bibliographic Details
10.1371/journal.pone.0157334; 10.1371/journal.pone.0157334.g001; 10.1371/journal.pone.0157334.t002; 10.1371/journal.pone.0157334.g004; 10.1371/journal.pone.0157334.g005; 10.1371/journal.pone.0157334.t001; 10.1371/journal.pone.0157334.g002; 10.1371/journal.pone.0157334.g003
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