Inhibitory effect of quercetin on the biofilm formation of Streptococcus mutans
10.3760/cma.j.issn.1002-0098.2016.06.010
- VernacularTitle:槲皮素对变形链球菌生物膜形成的影响
- Author:
Jiaxi YUE
1
;
Hongye YANG
;
Lin HAN
;
Minying ZHU
;
Fangfang SONG
;
Cui HUANG
Author Information
1. 430079,武汉大学口腔医学院口腔基础医学省部共建国家重点实验室培育基地和口腔生物医学教育部重点实验室
- Keywords:
Quercetin;
Streptococcus mutans;
Biofilms;
Microscopy,confocal
- From:
Chinese Journal of Stomatology
2016;51(6):368-373
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the inhibitory effect of quercetin on the biofilm formation of Streptococcus mutans(Sm),to preliminarily reveal the possible underlying mechanisms,and to evaluate the cytotoxicity of quercetion to human dental pulp cells so as to provide the theoretical basis for the application of quercetin in oral biomaterials.Methods Quercetin storage solution was diluted to 0,3.125,6.25,12.5,25,50,100,200,400 and 800 mg/L,and added into Sm medium for 4 h and 24 h,crystal violet staining was used to evaluate the biofilm volume.In subsequent detections,three groups were set:control(0 mg/L),200 mg/L quercetin and 400 mg/L quercetin.Confocal laser scanning microscopy was used to observe the morphology of the biofilm;qPCR for gtfB,gtfC,comD,comE,and luxS were assessed to preliminarily investigate the mechanisms.Finally,the methyl thiazolyl tetrazolium(MTT) test using human dental pulp cells was used to investigate cytotoxicity.Results Quercetin could significantly inhibit up to (86.16±0.45)％ of the biofilm formation of Sm (Compared with the control group P=0.00) and effectively removed (43.04±0.53)％ of the mature biofilm(Compared with the control group P=0.00).Confocal laser scanning microscopy photographs showed that after co-incubated for 24 h,the dense biofilm structures of the experimental group were destroyed by quercetin both at 200 mg/L and 400 mg/L.Quercetin suppressedover 50％ of the expression of gtfB,gtfC,comD,comE(compared with the control group P＜0.05) and promoted the expression of luxS up to 2.18 ±0.24 and 2.84±0.26 after 4 h and 24 h,respectively(compared with the control group P＜0.05).Quercetin also exhibited acceptable compatibility for human dental pulp cells.Conclusions Quercetin could effectively reduce the biofilm formation of Sm by inhibiting the expression of the related genes,and exhibited no cytotoxicity for human dental pulp cells.Quercetin has good potential to be applied in oral biological materials.
