scholarly journals Synergism of Streptococcus mutans and Candida albicans Reinforces Biofilm Maturation and Acidogenicity in Saliva: An In Vitro Study

2021 ◽  
Vol 10 ◽  
Author(s):  
Hye-Eun Kim ◽  
Yuan Liu ◽  
Atul Dhall ◽  
Marwa Bawazir ◽  
Hyun Koo ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Dental Caries ◽  
Streptococcus Mutans ◽  
Critical Role ◽  
In Vitro Study ◽  
Acidic Ph ◽  
Acidic Environment ◽  
Symbiotic Interaction ◽  
Biofilm Development

Early childhood caries, a virulent-form of dental caries, is painful, difficult, and costly to treat that has been associated with high levels of Streptococcus mutans (Sm) and Candida albicans (Ca) in plaque-biofilms on teeth. These microorganisms appear to develop a symbiotic cross-kingdom interaction that amplifies the virulence of plaque-biofilms. Although biofilm studies reveal synergistic bacterial-fungal association, how these organisms modulate cross-kingdom biofilm formation and enhance its virulence in the presence of saliva remain largely unknown. Here, we compared the properties of Sm and Sm-Ca biofilms cultured in saliva by examining the biofilm structural organization and capability to sustain an acidic pH environment conducive to enamel demineralization. Intriguingly, Sm-Ca biofilm is rapidly matured and maintained acidic pH-values (~4.3), while Sm biofilm development was retarded and failed to create an acidic environment when cultured in saliva. In turn, the human enamel slab surface was severely demineralized by Sm-Ca biofilms, while there was minimal damage to the enamel surface by Sm biofilm. Interestingly, Sm-Ca biofilms exhibited an acidic environment regardless of their hyphal formation ability. Our data reveal the critical role of symbiotic interaction between S. mutans and C. albicans in human saliva in the context of pathogenesis of dental caries, which may explain how the cross-kingdom interaction contributes to enhanced virulence of plaque-biofilm in the oral cavity.

scholarly journals Symbiotic Relationship between Streptococcus mutans and Candida albicans Synergizes Virulence of Plaque BiofilmsIn Vivo

2014 ◽  
Vol 82 (5) ◽  
pp. 1968-1981 ◽  
Author(s):  
Megan L. Falsetta ◽  
Marlise I. Klein ◽  
Punsiri M. Colonne ◽  
Kathleen Scott-Anne ◽  
Stacy Gregoire ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Dental Caries ◽  
Streptococcus Mutans ◽  
Bacterial Pathogen ◽  
Single Species ◽  
Content Type ◽  
3 Dimensional ◽  
Biofilm Development

ABSTRACTStreptococcus mutansis often cited as the main bacterial pathogen in dental caries, particularly in early-childhood caries (ECC).S. mutansmay not act alone;Candida albicanscells are frequently detected along with heavy infection byS. mutansin plaque biofilms from ECC-affected children. It remains to be elucidated whether this association is involved in the enhancement of biofilm virulence. We showed that the ability of these organisms together to form biofilms is enhancedin vitroandin vivo. The presence ofC. albicansaugments the production of exopolysaccharides (EPS), such that cospecies biofilms accrue more biomass and harbor more viableS. mutanscells than single-species biofilms. The resulting 3-dimensional biofilm architecture displays sizeableS. mutansmicrocolonies surrounded by fungal cells, which are enmeshed in a dense EPS-rich matrix. Using a rodent model, we explored the implications of this cross-kingdom interaction for the pathogenesis of dental caries. Coinfected animals displayed higher levels of infection and microbial carriage within plaque biofilms than animals infected with either species alone. Furthermore, coinfection synergistically enhanced biofilm virulence, leading to aggressive onset of the disease with rampant carious lesions. Ourin vitrodata also revealed that glucosyltransferase-derived EPS is a key mediator of cospecies biofilm development and that coexistence withC. albicansinduces the expression of virulence genes inS. mutans(e.g.,gtfB,fabM). We also found thatCandida-derived β1,3-glucans contribute to the EPS matrix structure, while fungal mannan and β-glucan provide sites for GtfB binding and activity. Altogether, we demonstrate a novel mutualistic bacterium-fungus relationship that occurs at a clinically relevant site to amplify the severity of a ubiquitous infectious disease.

scholarly journals Anti-Microbial Activity of Hempseed Oil and Sage Oil against Streptococcus mutans and Candida albicans: An In-Vitro Study

2021 ◽  
Vol 21 ◽  
Author(s):  
Ruchi Agrawal ◽  
Yunus Gonal Yusufsaheb ◽  
Naveen Narasimhamurthy ◽  
Afreen Begum Hasansab Itagi ◽  
Reena Kulshrestha ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Microbial Activity ◽  
Streptococcus Mutans ◽  
In Vitro Study ◽  
Vitro Study

scholarly journals The Effects of the Grape Seed Extract on Streptococcus mutans and Candida albicans: An In Vitro Study

2020 ◽  
Vol 12 (2) ◽  
pp. 35-39
Author(s):  
Masoumeh Aslanimehr ◽  
Ashraf Alizadeh ◽  
Faezeh Azmoudeh
Keyword(s):  
Candida Albicans ◽  
Streptococcus Mutans ◽  
Large Population ◽  
In Vitro Study ◽  
Grape Seed Extract ◽  
Grape Seed ◽  
Seed Extract ◽  
Vitis Vinifera L ◽  
Oral Pathogens

Background: Oral pathogens can affect a large population and the general health of individuals. Based on the evidence, the grape seed extract (GSE) contains herbal compounds that have the ability tosuppress oral pathogens associated with caries and fungal diseases. In this regard, the current studyaimed at evaluating the effect of GSE on Streptococcus mutans and Candida albicans. Methods: The grape (Vitis vinifera L.) seed was used in this in-vitro experimental study. After thepreparation of methanolic GSE, its effect on S. mutans and C. albicans was assessed at 0.25-256 mg/mL concentrations. Then, the minimum inhibitory concentration (MIC) and minimum bactericidalconcentration (MBC) were determined by macro broth dilution methods. Finally, data were analyzedby SPSS, version 20. Results: The results showed that GSE inhibits the growth of S. mutans and C. albicans. In addition, theMIC and MBC of the extract against S. mutans and C. albicans were 2 and 8 mg/mL, as well as 32 and64 mg/mL, respectively. Conclusions: In general, GSE had a significant antimicrobial effect on S. mutans, while it only affected C. albicans at high concentrations.

scholarly journals PERBANDINGAN EFEKTIFITAS JUS LIDAH BUAYA DAN KLORHEXIDIN 0.06% TERHADAP JUMLAH KOLONI STREPTOCOCCUS MUTANS SALIVA ANAK DENGAN KARIES

2018 ◽  
Vol 5 (1) ◽  
pp. 54
Author(s):  
Shanty Chairani ◽  
Sri W Rais ◽  
Rani Purba ◽  
Amalia AH
Keyword(s):  
Dental Caries ◽  
Streptococcus Mutans ◽  
Aloe Vera ◽  
Antimicrobial Properties ◽  
In Vitro Study ◽  
Control Group ◽  
Mouth Rinse ◽  
Active Components ◽  
Control Group Design

Background: Aloe vera contains active components such as antrhaquinones,saponin, glucomannans, and acemannans that have been known for its antimicrobial properties. In vitro study showed that Aloe vera extract can inhibit the growth of Streptococcus mutans. Studies reported that children with caries have high level of salivary S. mutans which is the main pathogen in dental caries. The gold standard mouthrinse for dental caries is chlorhexidine gluconate, but it has several side effects. The objective of this study was to compare the effect between Aloe vera juice and 0.06% chlorhexidine mouth rinse on salivary S. mutans in children with caries.Methods: This experimental research with pretest and post-test control group design conducted on 30 children (6-12 years old) with number of carious teeth >4. Subjects divided into 2 groups: Aloe vera juice group and 0.06% chlorhexidine group, which instructed to rinse their mouth with 10 ml stated mouthwash, twice a day, during 7-day period. Unstimulated saliva was collected at baseline and after 7 days then inoculated on mitis salivarius bacitracin agar. S. mutans were counted and expressed in CFU/ml. Data were analyzed using paired t-test and independent t-test.Result: The result showed that a significant reduction in salivary S.mutanscounts was observed with Aloe vera juice mouth rinse and 0.06% chlorhexidine (p<0.05). The mean reduction of S. mutans counts was not statistically significantly between grup (p>0.05).Conclusion: These findings suggest that Aloe vera juice can reduce salivary S. mutans in children with caries so it can be considered as alternative mouthwash to prevent caries.

scholarly journals Coordinated Regulation of the EIIMan and fruRKI Operons of Streptococcus mutans by Global and Fructose-Specific Pathways

2017 ◽  
Vol 83 (21) ◽  
Author(s):  
Lin Zeng ◽  
Brinta Chakraborty ◽  
Tanaz Farivar ◽  
Robert A. Burne
Keyword(s):  
Energy Metabolism ◽  
Dental Caries ◽  
Streptococcus Mutans ◽  
Regulation Of Gene Expression ◽  
Phosphotransferase System ◽  
Carbohydrate Source ◽  
Content Type ◽  
Fructose Metabolism ◽  
Biofilm Development

ABSTRACTThe glucose/mannose-phosphotransferase system (PTS) permease EIIManencoded bymanLMNin the dental caries pathogenStreptococcus mutanshas a dominant influence on sugar-specific, CcpA-independent catabolite repression (CR). Mutations inmanLaffect energy metabolism and virulence-associated traits, including biofilm formation, acid tolerance, and competence. Using promoter::reporter fusions, expression of themanLMNand thefruRKIoperons, encoding a transcriptional regulator, a fructose-1-phosphate kinase and a fructose-PTS permease EIIFru, respectively, was monitored in response to carbohydrate source and in mutants lacking CcpA, FruR, and components of EIIMan. Expression of genes for EIIManand EIIFruwas directly regulated by CcpA and CR, as evinced byin vivoandin vitromethods. Unexpectedly, not only was thefruRKIoperon negatively regulated by FruR, but also so wasmanLMN. Carbohydrate transport by EIIManhad a negative influence on expression ofmanLMNbut notfruRKI. In agreement with the proposed role of FruR in regulating these PTS operons, loss offruRorfruKsubstantially altered growth on a number of carbohydrates, including fructose. RNA deep sequencing revealed profound changes in gene regulation caused by deletion offruKorfruR. Collectively, these findings demonstrate intimate interconnection of the regulation of two major PTS permeases inS. mutansand reveal novel and important contributions of fructose metabolism to global regulation of gene expression.IMPORTANCEThe ability ofStreptococcus mutansand other streptococcal pathogens to survive and cause human diseases is directly dependent upon their capacity to metabolize a variety of carbohydrates, including glucose and fructose. Our research reveals that metabolism of fructose has broad influences on the regulation of utilization of glucose and other sugars, and mutants with changes in certain genes involved in fructose metabolism display profoundly different abilities to grow and express virulence-related traits. Mutants lacking the FruR regulator or a particular phosphofructokinase, FruK, display changes in expression of a large number of genes encoding transcriptional regulators, enzymes required for energy metabolism, biofilm development, biosynthetic and degradative processes, and tolerance of a spectrum of environmental stressors. Since fructose is a major component of the modern human diet, the results have substantial significance in the context of oral health and the development of dental caries.

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