Probiotic Lactobacilli Interfere with Streptococcus mutans Biofilm Formation In Vitro

2010 ◽  
Vol 62 (2) ◽  
pp. 618-622 ◽  
Author(s):  
Eva M. Söderling ◽  
Aino M. Marttinen ◽  
Anna L. Haukioja
Keyword(s):  
Streptococcus Mutans ◽  
Biofilm Formation ◽  
Probiotic Lactobacilli

Effect of desensitising paste containing 8% arginine and calcium carbonate on biofilm formation of Streptococcus mutans in vitro

2013 ◽  
Vol 41 (7) ◽  
pp. 619-627 ◽  
Author(s):  
Dongjie Fu ◽  
Dandan Pei ◽  
Cui Huang ◽  
Yinchen Liu ◽  
Xijin Du ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Streptococcus Mutans ◽  
Biofilm Formation

scholarly journals Role of the Streptococcus mutans irvA Gene in GbpC-Independent, Dextran-Dependent Aggregation and Biofilm Formation

2009 ◽  
Vol 75 (22) ◽  
pp. 7037-7043 ◽  
Author(s):  
Min Zhu ◽  
Dragana Ajdić ◽  
Yuan Liu ◽  
David Lynch ◽  
Justin Merritt ◽  
...  
Keyword(s):  
Streptococcus Mutans ◽  
Biofilm Formation ◽  
Growth Conditions ◽  
Parental Background ◽  
A Cell ◽  
Major Surface ◽  
Biofilm Development ◽  
Small Aggregation

ABSTRACT Dextran-dependent aggregation (DDAG) of Streptococcus mutans is an in vitro phenomenon that is believed to represent a property of the organism that is beneficial for sucrose-dependent biofilm development. GbpC, a cell surface glucan-binding protein, is responsible for DDAG in S. mutans when cultured under defined stressful conditions. Recent reports have described a putative transcriptional regulator gene, irvA, located just upstream of gbpC, that is normally repressed by the product of an adjacent gene, irvR. When repression of irvA is relieved, there is a resulting increase in the expression of GbpC and decreases in competence and synthesis of the antibiotic mutacin I. This study examined the role of irvA in DDAG and biofilm formation by engineering strains that overexpressed irvA (IrvA+) on an extrachromosomal plasmid. The IrvA+ strain displayed large aggregation particles that did not require stressful growth conditions. A novel finding was that overexpression of irvA in a gbpC mutant background retained a measure of DDAG, albeit very small aggregation particles. Biofilms formed by the IrvA+ strain in the parental background possessed larger-than-normal microcolonies. In a gbpC mutant background, the overexpression of irvA reversed the fragile biofilm phenotype normally associated with loss of GbpC. Real-time PCR and Northern blot analyses found that expression of gbpC did not change significantly in the IrvA+ strain but expression of spaP, encoding the major surface adhesin P1, increased significantly. Inactivation of spaP eliminated the small-particle DDAG. The results suggest that IrvA promotes DDAG not only by GbpC, but also via an increase in P1.

scholarly journals Expression of biofilm-associated genes of Streptococcus mutans in response to glucose and sucrose

2007 ◽  
Vol 56 (11) ◽  
pp. 1528-1535 ◽  
Author(s):  
Moshe Shemesh ◽  
Avshalom Tam ◽  
Doron Steinberg
Keyword(s):  
Gene Expression ◽  
Streptococcus Mutans ◽  
Biofilm Formation ◽  
Fold Increase ◽  
Extracellular Polysaccharide ◽  
Tooth Surface ◽  
Differential Analysis ◽  
Nutrient Contents ◽  
Genes Encoding

Streptococcus mutans is known as a primary pathogen of dental caries, one of the most common human infectious diseases. Exopolysaccharide synthesis, adherence to tooth surface and biofilm formation are important physiological and virulence factors of S. mutans. In vitro comparative gene expression analysis was carried out to differentiate 10 selected genes known to be mostly involved in S. mutans biofilm formation by comparing the expression under biofilm and planktonic environments. Real-time RT-PCR analyses indicated that all of the genes tested were upregulated in the biofilm compared to cells grown in planktonic conditions. The influence of simple dietary carbohydrates on gene expression in S. mutans biofilm was tested also. Among the tested genes, in the biofilm phase, the greatest induction was observed for gtf and ftf, which are genes encoding the extracellular polysaccharide-producing enzymes. Biofilm formation was accompanied by a 22-fold induction in the abundance of mRNA encoding glucosyltransferase B (GTFB) and a 14.8 -fold increase in mRNA encoding GTFC. Levels of mRNA encoding fructosyltransferase were induced approximately 11.8-fold in biofilm-derived cells. Another notable finding of this study suggests that glucose affects the expression of S. mutans GS5 biofilm genes. In spite of a significant upregulation in biofilm-associated gene expression in the presence of sucrose, the presence of glucose with sucrose reduced expression of most tested genes. Differential analysis of the transcripts from S. mutans, grown in media with various nutrient contents, revealed significant shifts in the expression of the genes involved in biofilm formation. The results presented here provide new insights at the molecular level regarding gene expression in this bacterium when grown under biofilm conditions, allowing a better understanding of the mechanism of biofilm formation by S. mutans.

scholarly journals In Vitro Inhibition of Streptococcus mutans Biofilm Formation on Hydroxyapatite by Subinhibitory Concentrations of Anthraquinones

2007 ◽  
Vol 51 (4) ◽  
pp. 1541-1544 ◽  
Author(s):  
Tom Coenye ◽  
Kris Honraet ◽  
Petra Rigole ◽  
Pol Nadal Jimenez ◽  
Hans J. Nelis
Keyword(s):  
Reactive Oxygen Species ◽  
Streptococcus Mutans ◽  
Biofilm Formation ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Membrane Perturbation ◽  
In Vitro Inhibition ◽  
Subinhibitory Concentrations

ABSTRACT We report that certain anthraquinones (AQs) reduce Streptococcus mutans biofilm formation on hydroxyapatite at concentrations below the MIC. Although AQs are known to generate reactive oxygen species, the latter do not underlie the observed effect. Our results suggest that AQs inhibit S. mutans biofilm formation by causing membrane perturbation.

scholarly journals Mutation of luxS Affects Biofilm Formation in Streptococcus mutans

2003 ◽  
Vol 71 (4) ◽  
pp. 1972-1979 ◽  
Author(s):  
Justin Merritt ◽  
Fengxia Qi ◽  
Steven D. Goodman ◽  
Maxwell H. Anderson ◽  
Wenyuan Shi
Keyword(s):  
Quorum Sensing ◽  
Streptococcus Mutans ◽  
Biofilm Formation ◽  
Microscopic Analysis ◽  
Homoserine Lactone ◽  
Good Evidence ◽  
Genome Project ◽  
Bacterial Biofilm ◽  
Wild Type

ABSTRACT Quorum sensing is a bacterial mechanism for regulating gene expression in response to changes in population density. Many bacteria are capable of acyl-homoserine lactone-based or peptide-based intraspecies quorum sensing and luxS-dependent interspecies quorum sensing. While there is good evidence about the involvement of intraspecies quorum sensing in bacterial biofilm, little is known about the role of luxS in biofilm formation. In this study, we report for the first time that luxS-dependent quorum sensing is involved in biofilm formation of Streptococcus mutans. S. mutans is a major cariogenic bacterium in the multispecies bacterial biofilm commonly known as dental plaque. An ortholog of luxS for S. mutans was identified using the data available in the S. mutans genome project (http://www.genome.ou.edu/smutans.html ). Using an assay developed for the detection of the LuxS-associated quorum sensing signal autoinducer 2 (AI-2), it was demonstrated that this ortholog was able to complement the luxS negative phenotype of Escherichia coli DH5α. It was also shown that AI-2 is indeed produced by S. mutans. AI-2 production is maximal during mid- to late-log growth in batch culture. Mutant strains devoid of the luxS gene were constructed and found to be defective in producing the AI-2 signal. There are also marked phenotypic differences between the wild type and the luxS mutants. Microscopic analysis of in vitro-grown biofilm structure revealed that the luxS mutant biofilms adopted a much more granular appearance, rather than the relatively smooth, confluent layer normally seen in the wild type. These results suggest that LuxS-dependent signal may play an important role in biofilm formation of S. mutans.

scholarly journals Indonesian Strain of Lactobacillus reuteri Probiotic Reduces the Initial Biofilm Colonization

2020 ◽  
Vol 14 (1) ◽  
pp. 544-553
Author(s):  
Armelia Sari Widyarman ◽  
Triska Ramajayanti ◽  
Citra Fragrantia Theodorea
Keyword(s):  
Streptococcus Mutans ◽  
Biofilm Formation ◽  
Lactobacillus Reuteri ◽  
Positive Control ◽  
Negative Control ◽  
Microbial Biofilms ◽  
Incubation Periods ◽  
Negative Controls ◽  
Initial Biofilm

Background: The benefits of probiotics for human health have long been proven. Probiotic Lactobacillus reuteri, can produce a beneficial broad-spectrum antibacterial compound called reuterin by metabolizing glycerol. Objective: The aim of the study was to investigate the effect of the Indonesian strain of L. reuteri LC382415 on mono- and dual-species Streptococcus mutans and Streptococcus sanguinis biofilms in vitro. Methods: Streptococcus mutans and S. sanguinis were cultured in BHI broth. Lactobacillus reuteri LC382415 was inoculated on MRS agar. The different concentrations effect of L. reuteri (1×104, 1×106, and 1×108 CFU/mL) with and without glycerol supplementation on microbial biofilms were examined using a biofilm assay after incubation for 1,3,6, and 24-h. The biofilm mass optical density was measured with a microplate spectrophotometer at 490 nm. Chlorhexidine gluconate (0.2%) was used as a positive control, and wells without treatment were used as negative controls. Results: A significant reduction in mono- and dual-species S. mutans and S. sanguinis biofilm formation was observed after treatment with all concentrations of L.reuteri and after all incubation periods (p<0.05) with or without glycerol supplementation. The concentration of 1×104 CFU/mL after 3-h incubation was the most effective in inhibiting biofilm formation, with 87.8% S. mutans, 95.9% S. sanguinis, and 80.4% dual-species biofilm reduction compared to the negative control (p<0.05). Conclusion: The Indonesian strain of L. reuteri effectively reduces mono- and dual-species S.mutans and S. sanguinis biofilms. This suggests that it may be useful in preventing biofilm formation in oral cavities. Future studies on the mechanism of action of this active component are warranted.

scholarly journals The potency of cajuputs candy in maintaining the competitive capacity of Streptococcus sanguinis upon Streptococcus mutans

2020 ◽  
Vol 1 (2) ◽  
pp. 87-99 ◽  
Author(s):  
Christofora Hanny Wijaya ◽  
Bernadeta RE Sari ◽  
Boy M Bachtiar
Keyword(s):  
Mrna Expression ◽  
Volatile Compounds ◽  
Streptococcus Mutans ◽  
Biofilm Formation ◽  
Dna Amount ◽  
Biofilm Inhibition ◽  
Oral Flora ◽  
Streptococcus Sanguinis ◽  
Total Dna

Streptococcus mutans were competing Streptococcus sanguinis in biofilm formation. As pioneer colonizer, S. sanguinis were able to control S. mutans growth. This study was aimed to explore the ability of sucrose and non-sucrose cajuputs candies (SCC and NSCC) in maintaining the antagonistic relationship between the indigenous oral flora when they grew as dual-species biofilms (S. sanguinis and S. mutans). The flavored candies (SCC and NSCC) contained cajuput and peppermint oils as the flavor which the volatile compounds had been identified. The unflavored candies were made similar to the flavored candy but excluding the flavor. The flavored candies, unflavored candies, and the control were exposed in vitro to the biofilms. The biofilms were examined for biofilm inhibition capacity, DNA amount, and the expression level of spxB mRNA. The biofilm inhibition by flavored candies were higher than the unflavored ones and were significantly different compared to the control. The flavored candies managed to decrease the total DNA amount in the biofilm, but unflavored samples did not. The qPCR assays showed that the exposure of candies did not alter the proportion of S. sanguinis DNA to S. mutans DNA in the biofilms. Meanwhile, spxB mRNA expression indicated the ability of S.sanguinis to control S. mutans growth.

scholarly journals DIFFERENCES IN THE EFFECTS OF 0.05% AND 0.1% PROPOLIS FLAVONOIDS ON IN VITRO BIOFILM FORMATION BY STREPTOCOCCUS MUTANS FROM CHILDREN’S DENTAL PLAQUE

2018 ◽  
Vol 11 (2) ◽  
pp. 215
Author(s):  
Agnes Linggriani ◽  
Mochamad Fahlevi Rizal ◽  
Eva Fauziah ◽  
Margaretha Suharsini
Keyword(s):  
Streptococcus Mutans ◽  
Dental Plaque ◽  
Biofilm Formation

 Objective: This study was conducted to analyze the effects obtained with different concentrations (0.5 and 0.1%) of propolis flavonoids on in vitro biofilm formation by clinical Streptococcus mutans strains isolated from children’s dental plaque.Materials and Methods: S. mutans isolated from children’s dental plaque was assayed for biofilm formation in 96-microwell plates using crystal violet.Results: The effects on S. mutans biofilm formation were the same for propolis flavonoids administered at concentrations of 0.05 and 0.1% (p>0.01).Conclusion: A 0.05% propolis flavonoids concentration was deemed as effective as a 0.1% concentration at inhibiting S. mutans biofilm formation.

scholarly journals Antibacterial and Antibiofilm Activities of a Novel Synthetic Cyclic Lipopeptide against Cariogenic Streptococcus mutans UA159

2017 ◽  
Vol 61 (8) ◽  
Author(s):  
Kyung R. Min ◽  
Adriana Galvis ◽  
Brandon Williams ◽  
Ramanjaneyulu Rayala ◽  
Predrag Cudic ◽  
...  
Keyword(s):  
Streptococcus Mutans ◽  
Biofilm Formation ◽  
Minimum Bactericidal Concentration ◽  
The Novel ◽  
Content Type ◽  
Cyclic Lipopeptide ◽  
Nonspecific Cytotoxicity ◽  
Antimicrobial Treatments ◽  
Time Kill

ABSTRACT Despite continuous efforts to control cariogenic dental biofilms, very few effective antimicrobial treatments exist. In this study, we characterized the activity of the novel synthetic cyclic lipopeptide 4 (CLP-4), derived from fusaricidin, against the cariogenic pathogen Streptococcus mutans UA159. We determined CLP-4's MIC, minimum bactericidal concentration (MBC), and spontaneous resistance frequency, and we performed time-kill assays. Additionally, we assessed CLP-4's potential to inhibit biofilm formation and eradicate preformed biofilms. Our results demonstrate that CLP-4 has strong antibacterial activity in vitro and is a potent bactericidal agent with low spontaneous resistance frequency. At a low concentration of 5 μg/ml, CLP-4 completely inhibited S. mutans UA159 biofilm formation, and at 50 μg/ml, it reduced the viability of established biofilms by >99.99%. We also assessed CLP-4's cytotoxicity and stability against proteolytic digestion. CLP-4 withstood trypsin or chymotrypsin digestion even after treatment for 24 h, and our toxicity studies showed that CLP-4 effective concentrations had negligible effects on hemolysis and the viability of human oral fibroblasts. In summary, our findings showed that CLP-4 is a potent antibacterial and antibiofilm agent with remarkable stability and low nonspecific cytotoxicity. Hence, CLP-4 is a promising novel antimicrobial peptide with potential for clinical application in the prevention and treatment of dental caries.

Silver–polysaccharide antimicrobial nanocomposite coating for methacrylic surfaces reduces Streptococcus mutans biofilm formation in vitro

2015 ◽  
Vol 43 (12) ◽  
pp. 1483-1490 ◽  
Author(s):  
A.C. Ionescu ◽  
E. Brambilla ◽  
A. Travan ◽  
E. Marsich ◽  
I. Donati ◽  
...  
Keyword(s):  
Streptococcus Mutans ◽  
Biofilm Formation ◽  
Nanocomposite Coating
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