Use of the quorum sensing inhibitor furanone C-30 to interfere with biofilm formation by Streptococcus mutans and its luxS mutant strain

International Journal of Antimicrobial Agents
Zhiyan HeZhengwei Huang

Abstract

Streptococcus mutans is recognised as a major aetiological agent of dental caries. One of its important virulence factors is its ability to form biofilms on tooth surfaces. The aim of this study was to evaluate the effects of the quorum sensing inhibitor furanone C-30 on biofilm formation by S. mutans and its luxS mutant strain. The effects of furanone C-30 on biofilms of both strains formed on 96-well microtitre plates at 37 °C were determined by a colorimetric technique (MTT assay). Different concentrations of furanone C-30 (0.0, 2.0 and 4.0 μg/mL) and different time points of biofilm formation (4, 14 and 24 h) were investigated. The structures and thickness of the biofilms were observed by confocal laser scanning microscopy (CLSM). Quorum sensing-related gene expression (ftf, smu630, brpA, gbpB, gtfB, vicR, comDE and relA) was investigated by real-time polymerase chain reaction (RT-PCR). The results showed that synthetic furanone C-30 can inhibit biofilm formation by S. mutans and its luxS mutant strain, although it does not affect the bacterial growth rate itself. The quantities of biofilm formed by both strains significantly decreased (P<0.05) and the biofilms became thinner and looser as revealed by CLSM with increasing c...Continue Reading

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Citations

Mar 30, 2013·International Journal of Oral Science·Yue-Jian HuZheng-Wei Huang
Jul 12, 2013·Future Microbiology·Fengjun SunDongsheng Zhou
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Oct 15, 2019·Frontiers in Microbiology·Zhiyan HeWei Zhou
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