1
|
Flemming J, Meyer-Probst CT, Speer K, Kölling-Speer I, Hannig C, Hannig M. Preventive Applications of Polyphenols in Dentistry-A Review. Int J Mol Sci 2021; 22:4892. [PMID: 34063086 PMCID: PMC8124254 DOI: 10.3390/ijms22094892] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/27/2021] [Accepted: 04/27/2021] [Indexed: 01/18/2023] Open
Abstract
Polyphenols are natural substances that have been shown to provide various health benefits. Antioxidant, anti-inflammatory, and anti-carcinogenic effects have been described. At the same time, they inhibit the actions of bacteria, viruses, and fungi. Thus, studies have also examined their effects within the oral cavity. This review provides an overview on the different polyphenols, and their structure and interactions with the tooth surface and the pellicle. In particular, the effects of various tea polyphenols on bioadhesion and erosion have been reviewed. The current research confirms that polyphenols can reduce the growth of cariogenic bacteria. Furthermore, they can decrease the adherence of bacteria to the tooth surface and improve the erosion-protective properties of the acquired enamel pellicle. Tea polyphenols, especially, have the potential to contribute to an oral health-related diet. However, in vitro studies have mainly been conducted. In situ studies and clinical studies need to be extended and supplemented in order to significantly contribute to additive prevention measures in caries prophylaxis.
Collapse
Affiliation(s)
- Jasmin Flemming
- Clinic of Operative Dentistry, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Fetscherstraße 74, D-01307 Dresden, Germany; (J.F.); (C.H.)
| | - Clara Theres Meyer-Probst
- Clinic of Operative Dentistry, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Fetscherstraße 74, D-01307 Dresden, Germany; (J.F.); (C.H.)
| | - Karl Speer
- Special Food Chemistry and Food Production, TU Dresden, Bergstraße 66, D-01069 Dresden, Germany; (K.S.); (I.K.-S.)
| | - Isabelle Kölling-Speer
- Special Food Chemistry and Food Production, TU Dresden, Bergstraße 66, D-01069 Dresden, Germany; (K.S.); (I.K.-S.)
| | - Christian Hannig
- Clinic of Operative Dentistry, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Fetscherstraße 74, D-01307 Dresden, Germany; (J.F.); (C.H.)
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, University Hospital, Saarland University, Building 73, D-66421 Homburg, Germany;
| |
Collapse
|
2
|
Inhibitory Effect of Phenolic Acids in Rubus coreanus on Glucosyltransferase of Streptococcus mutans. Curr Microbiol 2020; 77:3695-3703. [DOI: 10.1007/s00284-020-02179-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 08/25/2020] [Indexed: 01/21/2023]
|
3
|
Zhang Q, Nijampatnam B, Hua Z, Nguyen T, Zou J, Cai X, Michalek SM, Velu SE, Wu H. Structure-Based Discovery of Small Molecule Inhibitors of Cariogenic Virulence. Sci Rep 2017; 7:5974. [PMID: 28729722 PMCID: PMC5519559 DOI: 10.1038/s41598-017-06168-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 06/09/2017] [Indexed: 02/05/2023] Open
Abstract
Streptococcus mutans employs a key virulence factor, three glucosyltransferase (GtfBCD) enzymes to establish cariogenic biofilms. Therefore, the inhibition of GtfBCD would provide anti-virulence therapeutics. Here a small molecule library of 500,000 small molecule compounds was screened in silico against the available crystal structure of the GtfC catalytic domain. Based on the predicted binding affinities and drug-like properties, small molecules were selected and evaluated for their ability to reduce S. mutans biofilms, as well as inhibit the activity of Gtfs. The most potent inhibitor was further characterized for Gtf binding using OctetRed instrument, which yielded low micromolar KD against GtfB and nanomolar KD against GtfC, demonstrating selectivity towards GtfC. Additionally, the lead compound did not affect the overall growth of S. mutans and commensal oral bacteria, and selectively inhibit the biofilm formation by S. mutans, indicative of its selectivity and non-bactericidal nature. The lead compound also effectively reduced cariogenicity in vivo in a rat model of dental caries. An analog that docked poorly in the GtfC catalytic domain failed to inhibit the activity of Gtfs and S. mutans biofilms, signifying the specificity of the lead compound. This report illustrates the validity and potential of structure-based design of anti-S. mutans virulence inhibitors.
Collapse
Affiliation(s)
- Qiong Zhang
- Department of Pediatric Dentistry, University of Alabama at Birmingham, School of Dentistry, Birmingham, Alabama, 35294, USA.,Department of Pediatric Dentistry, West China Hospital of Stomatology, State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, Sichuan, 610041, P.R. China
| | - Bhavitavya Nijampatnam
- Department of Chemistry, University of Alabama at Birmingham, 901, 14th Street S, Birmingham, AL, 35294, USA
| | - Zhang Hua
- Department of Pediatric Dentistry, University of Alabama at Birmingham, School of Dentistry, Birmingham, Alabama, 35294, USA
| | - Thao Nguyen
- Department of Chemistry, University of Alabama at Birmingham, 901, 14th Street S, Birmingham, AL, 35294, USA
| | - Jing Zou
- Department of Pediatric Dentistry, University of Alabama at Birmingham, School of Dentistry, Birmingham, Alabama, 35294, USA
| | - Xia Cai
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Suzanne M Michalek
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Sadanandan E Velu
- Department of Chemistry, University of Alabama at Birmingham, 901, 14th Street S, Birmingham, AL, 35294, USA.
| | - Hui Wu
- Department of Pediatric Dentistry, University of Alabama at Birmingham, School of Dentistry, Birmingham, Alabama, 35294, USA. .,Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA.
| |
Collapse
|
4
|
Kawarai T, Narisawa N, Suzuki Y, Nagasawa R, Senpuku H. Streptococcus mutans biofilm formation is dependent on extracellular DNA in primary low pH conditions. J Oral Biosci 2016. [DOI: 10.1016/j.job.2015.12.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
5
|
Wang Y, Hao H, Zhang S. Lysozyme loading and release from Se doped hydroxyapatite nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 61:545-52. [DOI: 10.1016/j.msec.2015.12.060] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2013] [Revised: 11/14/2015] [Accepted: 12/28/2015] [Indexed: 12/15/2022]
|
6
|
Mohsin S, Manohar B, Rajesh S, Asif Y. The effects of a dentifrice containing propolis on Mutans Streptococci: a clinico-microbiological study. Ethiop J Health Sci 2015; 25:9-16. [PMID: 25733780 PMCID: PMC4337077 DOI: 10.4314/ejhs.v25i1.3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background Propolis is a natural resinous mixture produced by honeybees, which exhibits anti-microbial, anti-inflammatory, cytostatic and cariostatic properties. The aim of the study was to evaluate the anti-bacterial efficacy of a propolis based dentifrice on Mutans Streptococci colonizing the oral cavity of young patients using Dentocult® SM strip mutans test. Methods Screening of 367 male subjects within the age group of 7–12 years was carried out. A total of 30 children were included in the study. They were instructed to use a Propolis dentifrice (Probee,™ Quasi-Medical Products, Seoul Propolis) daily for three minutes over a period of four weeks. Plaque and salivary samples were collected at baseline, 1st week, 3rd week and 4th week and were analyzed for Mutans Streptococci count using Dentocult® SM strip Mutans kit (Orion Diagnostica Oy, Finland). Student paired t-test and Friedman test were used for statistical analysis. Results It was unveiled that mean Mutans streptococci count at 1st week and 4th week, showed significant reduction (p≤0.0001), compared to baseline scores. Using Friedman's test, statistically significant difference was found between baseline and 1st week, 3rd week and 4th week follow up (P < 0.001). Conclusion Propolis dentifrice reduces in-vivo microbial load in microenvironments especially against Mutans streptococci in the oral cavity of young patients. Thus, it's potential to be inculcated and used as an alternative measure to prevent dental caries can be considered and further investigation involving greater number of participants is recommended.
Collapse
Affiliation(s)
- S Mohsin
- Department of Pedodontics and Preventive Dentistry, Jaipur Dental College, Jaipur, Rajasthan, India
| | - B Manohar
- Department of Pedodontics and Preventive Dentistry, Jaipur Dental College, Jaipur, Rajasthan, India
| | - S Rajesh
- Department of Pedodontics and Preventive Dentistry, Jaipur Dental College, Jaipur, Rajasthan, India
| | - Y Asif
- Department of Public Health Dentistry, Jaipur Dental College, Jaipur, Rajasthan, India
| |
Collapse
|
7
|
Fears KP, Gonzalez-Begne M, Love CT, Day DE, Koo H. Surface-induced changes in the conformation and glucan production of glucosyltransferase adsorbed on saliva-coated hydroxyapatite. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:4654-4662. [PMID: 25867796 DOI: 10.1021/la504461h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Glucosyltransferases (Gtfs) from S. mutans play critical roles in the development of virulent oral biofilms associated with dental caries disease. Gtfs adsorbed to the tooth surface produce glucans that promote local microbial colonization and provide an insoluble exopolysaccharides (EPS) matrix that facilitates biofilm initiation. Moreover, agents that inhibit the enzymatic activity of Gtfs in solution often have reduced or no effects on surface-adsorbed Gtfs. This study elucidated the mechanisms responsible for the differences in functionality that GtfB exhibits in solution vs surface-adsorbed. Upon adsorption to planar fused-quartz substrates, GtfB displayed a 37% loss of helices and 36% increase of β-sheets, as determined by circular dichroism (CD) spectroscopy, and surface-induced conformational changes were more severe on substrates modified with CH3- and NH2-terminated self-assembled monolayers. GtfB also underwent substantial conformation changes when adsorbing to hydroxyapatite (HA) microspheres, likely due to electrostatic interactions between negatively charged GtfB and positively charged HA crystal faces. Conformational changes were lessened when HA surfaces were coated with saliva (sHA) prior to GtfB adsorption. Furthermore, GtfB remained highly active on sHA, as determined by in situ attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, producing glucans that were structurally different than GtfB in solution and known to increase the accumulation and virulence of biofilms. Our data provide the first insight into the structural underpinnings governing Gtf conformation and enzymatic function that occur on tooth surfaces in vivo, which may lead to designing potent new inhibitors and improved strategies to combat the formation of pathogenic oral biofilms.
Collapse
Affiliation(s)
- Kenan P Fears
- †Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Mireya Gonzalez-Begne
- ‡Department of Dentistry and Center for Oral Biology, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Corey T Love
- †Chemistry Division, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Delbert E Day
- §Department of Materials Science and Engineering and Center for Bone and Tissue Repair and Regeneration, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
| | - Hyun Koo
- ∥Biofilm Research Laboratories, Levy Center for Oral Health, Department of Orthodontics and Division of Pediatric Dentistry and Community Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| |
Collapse
|
8
|
Ahn SJ, Song YD, Mah SJ, Cho EJ, Kook JK. Determination of optimal concentration of deglycyrrhizinated licorice root extract for preventing dental caries using a bacterial model system. J Dent Sci 2014. [DOI: 10.1016/j.jds.2014.03.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
9
|
Kim MA, Lee KY, Kim JG. Monoclonal antibodies specific to Streptococcus mutans GS-5 glucosyltransferase-C inhibit bacterial glucosyltransferase. Monoclon Antib Immunodiagn Immunother 2013; 32:330-5. [PMID: 24111864 DOI: 10.1089/mab.2013.0028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Glucosyltransferase-C (GTFC) is a virulence factor of Streptococcus mutans. Additionally, GTFC represents an essential element required for bacterial cell coherence, allowing for the formation of dental plaque, which leads to dental caries. As such, monoclonal antibodies (MAbs) against S. mutans are believed to offer some protection against dental caries. In the current study, we amplified an approximately 1.5 kb fragment of the N-terminal half of the S. mutans gtfC gene by PCR, then induced expression of this gene. This protein was designated GTFCN. After the expressed protein was purified, it was used as an immunogen and injected into BALB/c mice. We selected and established two MAbs by producing hybridomas (HCN17 and HCN37). The anti-GTFCN antibody isotype was confirmed as IgG2a for HCN17 and IgG2b for HCN37. The anti-GTFCN antibody was found to specifically react with the GTFCN protein. The enzymatic activity of the crude glucosyltransferase of S. mutans GS-5 was significantly inhibited at a concentration of 350 ng of MAb/mL. These results suggest that the monoclonal anti-GTFCN antibodies could represent an alternative modality for passive immunization to prevent S. mutans aggregation and dental plaque.
Collapse
Affiliation(s)
- Mi-Ah Kim
- 1 Department of Pediatric Dentistry and Institute of Oral Bioscience, Chonbuk National University , Duckjingu, Jeonju-si, Jeollabuk-do, Korea
| | | | | |
Collapse
|
10
|
Koo H, Falsetta ML, Klein MI. The exopolysaccharide matrix: a virulence determinant of cariogenic biofilm. J Dent Res 2013; 92:1065-73. [PMID: 24045647 DOI: 10.1177/0022034513504218] [Citation(s) in RCA: 349] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Many infectious diseases in humans are caused or exacerbated by biofilms. Dental caries is a prime example of a biofilm-dependent disease, resulting from interactions of microorganisms, host factors, and diet (sugars), which modulate the dynamic formation of biofilms on tooth surfaces. All biofilms have a microbial-derived extracellular matrix as an essential constituent. The exopolysaccharides formed through interactions between sucrose- (and starch-) and Streptococcus mutans-derived exoenzymes present in the pellicle and on microbial surfaces (including non-mutans) provide binding sites for cariogenic and other organisms. The polymers formed in situ enmesh the microorganisms while forming a matrix facilitating the assembly of three-dimensional (3D) multicellular structures that encompass a series of microenvironments and are firmly attached to teeth. The metabolic activity of microbes embedded in this exopolysaccharide-rich and diffusion-limiting matrix leads to acidification of the milieu and, eventually, acid-dissolution of enamel. Here, we discuss recent advances concerning spatio-temporal development of the exopolysaccharide matrix and its essential role in the pathogenesis of dental caries. We focus on how the matrix serves as a 3D scaffold for biofilm assembly while creating spatial heterogeneities and low-pH microenvironments/niches. Further understanding on how the matrix modulates microbial activity and virulence expression could lead to new approaches to control cariogenic biofilms.
Collapse
Affiliation(s)
- H Koo
- Center for Oral Biology, University of Rochester Medical Center, Rochester, NY, USA
| | | | | |
Collapse
|
11
|
Tahmourespour A, Salehi R, Kasra Kermanshahi R. Lactobacillus Acidophilus-Derived Biosurfactant Effect on GTFB and GTFC Expression Level in Streptococcus Mutans Biofilm Cells. Braz J Microbiol 2013; 42:330-9. [PMID: 24031639 PMCID: PMC3768947 DOI: 10.1590/s1517-83822011000100042] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 04/23/2010] [Accepted: 06/21/2010] [Indexed: 11/22/2022] Open
Abstract
Streptococcus mutans (S. mutans), harboring biofilm formation, considered as a main aetiological factor of dental caries. Gtf genes play an important role in S. mutans biofilm formation. The purpose of this study was to investigate the effect of Lactobacillus acidophilus–derived biosurfactant on S. mutans biofilm formation and gtfB/C expression level (S. mutans standard strain ATCC35668 and isolated S. mutans strain (22) from dental plaque). The Lactobacillus acidophilus (L. acidophilus) DSM 20079 was selected as a probiotic strain to produce biosurfactant. The FTIR analysis of its biosurfactant showed that it appears to have a protein-like component. Due to the release of such biosurfactants, L. acidophilus was able to interfere in the adhesion and biofilm formation of the S. mutans to glass slide. It also could make streptococcal chains shorter. Using realtime RT-PCR quantitation method made it clear that gtfB and gtfC gene expression were decreased in the presence of L. acidophilus–derived biosurfactant fraction. Several properties of S. mutans cells (the surface properties, biofilm formation, adhesion ability and gene expression) were changed after L. acidophilus- derived biosurfactant treatment. It is also concluded that biosurfacant treatment can provide an optional way to control biofilm development. On the basis of our findings, we can suggest that the prepared biosurfactant may interfere with adhesion processes of S. mutans to teeth surfaces, provided additional evaluation produce satisfactory results.
Collapse
Affiliation(s)
- Arezoo Tahmourespour
- Assistant Professor of Microbiology, Islamic Azad University-Khorasgan branch , Isfahan , Iran
| | | | | |
Collapse
|
12
|
Ahn SJ, Cho EJ, Oh SS, Lim BS. The effects of orthodontic bonding steps on biofilm formation of Streptococcus mutans in the presence of saliva. Acta Odontol Scand 2012; 70:504-10. [PMID: 22181697 DOI: 10.3109/00016357.2011.640277] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To investigate the effects of various orthodontic bonding steps on biofilm formation of Streptococcus mutans in the presence of saliva. MATERIALS AND METHODS Hydroxyapatite (HA) and orthodontic adhesive (AD) disks were prepared to a uniform size. HA disks were etched with 37% phosphoric acid gel in the etched group (HE). In the primed group (HP), Transbond XT primer was applied to the etched HA surface and light-cured. For biofilm formation, Streptococcus mutans was grown on each specimen in a biofilm medium with either glucose or sucrose in the presence of fluid-phase UWS (F-UWS) or surface adsorbed saliva (S-UWS). The adherent bacteria were quantified by enumeration of the total viable counts of bacteria. Biofilms formed on each surface were examined by scanning electron microscopy. RESULTS When glucose was used, both F-UWS and S-UWS suppressed biofilm formation of S. mutans. Compared to HA and HE, biofilm formation was significantly inhibited on HP and AD in the presence of glucose. Biofilm-forming patterns that were inhibited by saliva were restored in a sucrose-containing medium. F-UWS promoted biofilm formation on HA and HE, while S-UWS significantly promoted biofilm formation on HP. S. mutans developed biofilm better on HA and HE than on AD when sucrose was used as the sole carbohydrate source. CONCLUSIONS This study suggests that the biofilm development by S. mutans is significantly influenced by the orthodontic bonding procedure. Biofilm formation of S. mutans was inhibited on AD more than other surfaces, irrespective of the presence of saliva or a carbohydrate source.
Collapse
Affiliation(s)
- Sug-Joon Ahn
- Dental Research Institute, School of Dentistry, Seoul National University, Korea
| | | | | | | |
Collapse
|
13
|
Park JW, Song CW, Jung JH, Ahn SJ, Ferracane JL. The effects of surface roughness of composite resin on biofilm formation of Streptococcus mutans in the presence of saliva. Oper Dent 2012; 37:532-9. [PMID: 22339385 DOI: 10.2341/11-371-l] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The purpose of this study was to investigate the effects of surface roughness of resin composite on biofilm formation of Streptococcus mutans in the presence of saliva. To provide uniform surface roughness on composites, disks were prepared by curing composite against 400-grit silicon carbide paper (SR400), 800-grit silicon carbide paper (SR800), or a glass slide (SRGlass). The surface roughness was examined using confocal laser microscopy. For biofilm formation, S. mutans was grown for 24 hours with each disk in a biofilm medium with either glucose or sucrose in the presence of fluid-phase or surface-adsorbed saliva. The adherent bacteria were quantified via enumeration of the total viable counts of bacteria. Biofilms were examined using scanning electron microscopy. This study showed that SR400 had deeper and larger, but fewer depressions than SR800. Compared to SRGlass and SR800, biofilm formation was significantly increased on SR400. In addition, the differences in the effect of surface roughness on the amount of biofilm formation were not significantly influenced by either the presence of saliva or the carbohydrate source. Considering that similar differences in surface roughness were observed between SR400 and SR800 and between SR800 and SRGlass, this study suggests that surface topography (size and depth of depressions) may play a more important role than surface roughness in biofilm formation of S. mutans .
Collapse
Affiliation(s)
- J W Park
- Yonsei University College of Dentistry, Conservative Dentistry, Gangnam Severance Hospital, Seoul, Republic of Korea
| | | | | | | | | |
Collapse
|
14
|
Pandit S, Kim GR, Lee MH, Jeon JG. Evaluation of Streptococcus mutans biofilms formed on fluoride releasing and non fluoride releasing resin composites. J Dent 2011; 39:780-7. [DOI: 10.1016/j.jdent.2011.08.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2011] [Revised: 08/16/2011] [Accepted: 08/18/2011] [Indexed: 11/17/2022] Open
|
15
|
Jeon JG, Rosalen PL, Falsetta ML, Koo H. Natural products in caries research: current (limited) knowledge, challenges and future perspective. Caries Res 2011; 45:243-63. [PMID: 21576957 PMCID: PMC3104868 DOI: 10.1159/000327250] [Citation(s) in RCA: 186] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2010] [Accepted: 03/08/2011] [Indexed: 02/04/2023] Open
Abstract
Dental caries is the most prevalent and costly oral infectious disease worldwide. Virulent biofilms firmly attached to tooth surfaces are prime biological factors associated with this disease. The formation of an exopolysaccharide-rich biofilm matrix, acidification of the milieu and persistent low pH at the tooth-biofilm interface are major controlling virulence factors that modulate dental caries pathogenesis. Each one offers a selective therapeutic target for prevention. Although fluoride, delivered in various modalities, remains the mainstay for the prevention of caries, additional approaches are required to enhance its effectiveness. Available antiplaque approaches are based on the use of broad-spectrum microbicidal agents, e.g. chlorhexidine. Natural products offer a rich source of structurally diverse substances with a wide range of biological activities, which could be useful for the development of alternative or adjunctive anticaries therapies. However, it is a challenging approach owing to complex chemistry and isolation procedures to derive active compounds from natural products. Furthermore, most of the studies have been focused on the general inhibitory effects on glucan synthesis as well as on bacterial metabolism and growth, often employing methods that do not address the pathophysiological aspects of the disease (e.g. bacteria in biofilms) and the length of exposure/retention in the mouth. Thus, the true value of natural products in caries prevention and/or their exact mechanisms of action remain largely unknown. Nevertheless, natural substances potentially active against virulent properties of cariogenic organisms have been identified. This review focuses on gaps in the current knowledge and presents a model for investigating the use of natural products in anticaries chemotherapy.
Collapse
Affiliation(s)
- J-G Jeon
- Department of Preventive Dentistry, BK 21 Program, School of Dentistry and Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
| | | | | | | |
Collapse
|
16
|
do Rosário AF, Knop LAH, Baboni FB, Rymovicz AUM, Tanaka OM, Rosa EAR. Differential adhesion of Streptococcus mutans to metallic brackets induced by saliva from caries-free and caries-active individuals. ACTA ACUST UNITED AC 2011; 2:197-200. [DOI: 10.1111/j.2041-1626.2011.00058.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
17
|
Bowen WH, Koo H. Biology of Streptococcus mutans-derived glucosyltransferases: role in extracellular matrix formation of cariogenic biofilms. Caries Res 2011; 45:69-86. [PMID: 21346355 PMCID: PMC3068567 DOI: 10.1159/000324598] [Citation(s) in RCA: 678] [Impact Index Per Article: 52.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2009] [Accepted: 01/26/2011] [Indexed: 12/18/2022] Open
Abstract
The importance of Streptococcus mutans in the etiology and pathogenesis of dental caries is certainly controversial, in part because excessive attention is paid to the numbers of S. mutans and acid production while the matrix within dental plaque has been neglected. S. mutans does not always dominate within plaque; many organisms are equally acidogenic and aciduric. It is also recognized that glucosyltransferases from S. mutans (Gtfs) play critical roles in the development of virulent dental plaque. Gtfs adsorb to enamel synthesizing glucans in situ, providing sites for avid colonization by microorganisms and an insoluble matrix for plaque. Gtfs also adsorb to surfaces of other oral microorganisms converting them to glucan producers. S. mutans expresses 3 genetically distinct Gtfs; each appears to play a different but overlapping role in the formation of virulent plaque. GtfC is adsorbed to enamel within pellicle whereas GtfB binds avidly to bacteria promoting tight cell clustering, and enhancing cohesion of plaque. GtfD forms a soluble, readily metabolizable polysaccharide and acts as a primer for GtfB. The behavior of soluble Gtfs does not mirror that observed with surface-adsorbed enzymes. Furthermore, the structure of polysaccharide matrix changes over time as a result of the action of mutanases and dextranases within plaque. Gtfs at distinct loci offer chemotherapeutic targets to prevent caries. Nevertheless, agents that inhibit Gtfs in solution frequently have a reduced or no effect on adsorbed enzymes. Clearly, conformational changes and reactions of Gtfs on surfaces are complex and modulate the pathogenesis of dental caries in situ, deserving further investigation.
Collapse
Affiliation(s)
- W H Bowen
- Center for Oral Biology, University of Rochester, Rochester, NY 14642, USA.
| | | |
Collapse
|
18
|
Matsumoto-Nakano M, Nagayama K, Kitagori H, Fujita K, Inagaki S, Takashima Y, Tamesada M, Kawabata S, Ooshima T. Inhibitory effects of Oenothera biennis (evening primrose) seed extract on Streptococcus mutans and S. mutans-induced dental caries in rats. Caries Res 2011; 45:56-63. [PMID: 21311187 DOI: 10.1159/000323376] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Accepted: 11/29/2010] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Oenothera biennis (evening primrose) seed extract (OBSE) is known to contain polyphenols, which may possess antioxidant activities. Polyphenols extracted from several plants are reported to exhibit cariostatic activities by inhibiting mutans streptococcus growth and glucosyltransferase activities. The purpose of the present study was to examine the inhibitory effects of OBSE on the development of dental caries, both in vitro and in vivo. METHODS OBSE was investigated for its inhibitory effects on cellular aggregation, hydrophobicity, sucrose-dependent adherence and insoluble glucan synthesis. Furthermore, biofilm formation was examined in the presence of OBSE, using confocal microscopic imaging. An animal experiment was also performed to examine the in vivo effects. RESULTS OBSE induced a strong aggregation of Streptococcus mutans MT8148 cells, while cell surface hydrophobicity was decreased by approximately 90% at a concentration of 0.25 mg/ml. The sucrose-dependent adherence of the MT8148 cells was also reduced by addition of OBSE, with a reduction rate of 73% seen at a concentration of 1.00 mg/ml. Additionally, confocal microscopic observations revealed the biofilm development phase to be remarkably changed in the presence of OBSE. Furthermore, insoluble glucan synthesis was significantly reduced when OBSE was present at concentrations greater than 0.03 mg/ml. In an animal experiment, the caries scores in rats given OBSE (0.05 mg/ml in drinking water) were significantly lower than those in rats given water without OBSE. CONCLUSION Our results indicate that OBSE has inhibitory activity on dental caries.
Collapse
Affiliation(s)
- M Matsumoto-Nakano
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Murata RM, Branco-de-Almeida LS, Franco EM, Yatsuda R, dos Santos MH, de Alencar SM, Koo H, Rosalen PL. Inhibition of Streptococcus mutans biofilm accumulation and development of dental caries in vivo by 7-epiclusianone and fluoride. BIOFOULING 2010; 26:865-872. [PMID: 20938851 PMCID: PMC3047413 DOI: 10.1080/08927014.2010.527435] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
7-Epiclusianone (7-epi), a novel naturally occurring compound isolated from Rheedia brasiliensis, effectively inhibits the synthesis of exopolymers and biofilm formation by Streptococcus mutans. In the present study, the ability of 7-epi, alone or in combination with fluoride (F), to disrupt biofilm development and pathogenicity of S. mutans in vivo was examined using a rodent model of dental caries. Treatment (twice-daily, 60s exposure) with 7-epi, alone or in combination with 125 ppm F, resulted in biofilms with less biomass and fewer insoluble glucans than did those treated with vehicle-control, and they also displayed significant cariostatic effects in vivo (p < 0.05). The combination 7-epi + 125 ppm F was as effective as 250 ppm F (positive-control) in reducing the development of both smooth- and sulcal-caries. No histopathological alterations were observed in the animals after the experimental period. The data show that 7-epiclusianone is a novel and effective antibiofilm/anticaries agent, which may enhance the cariostatic properties of fluoride.
Collapse
Affiliation(s)
- Ramiro M. Murata
- Faculty of Dentistry of Piracicaba, Department of Physiological Sciences, University of Campinas, SP, Brazil
| | | | - Eliane M. Franco
- Faculty of Dentistry of Piracicaba, Department of Physiological Sciences, University of Campinas, SP, Brazil
| | - Regiane Yatsuda
- Faculty of Dentistry of Piracicaba, Department of Physiological Sciences, University of Campinas, SP, Brazil
| | | | - Severino M. de Alencar
- Department of Agri-food Industry, Food and Nutrition, “Luiz de Queiroz” College of Agriculture, State University of Sao Paulo, SP, Brazil
| | - Hyun Koo
- Center for Oral Biology, Eastman Department of Dentistry, and Department of Microbiology and Immunology, University of Rochester Medical Center, NY, USA
- Natural Product Research Group in Oral Biology (NatPROB)
| | - Pedro L. Rosalen
- Faculty of Dentistry of Piracicaba, Department of Physiological Sciences, University of Campinas, SP, Brazil
- Natural Product Research Group in Oral Biology (NatPROB)
| |
Collapse
|
20
|
Koo H, Jeon JG. Naturally occurring molecules as alternative therapeutic agents against cariogenic biofilms. Adv Dent Res 2010; 21:63-8. [PMID: 19717411 DOI: 10.1177/0895937409335629] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- H Koo
- Eastman Department of Dentistry and Center for Oral Biology, University of Rochester Medical Center, Box 683, Rochester, NY 14620, USA.
| | | |
Collapse
|
21
|
Koo H, Xiao J, Klein MI, Jeon JG. Exopolysaccharides produced by Streptococcus mutans glucosyltransferases modulate the establishment of microcolonies within multispecies biofilms. J Bacteriol 2010; 192:3024-32. [PMID: 20233920 PMCID: PMC2901689 DOI: 10.1128/jb.01649-09] [Citation(s) in RCA: 335] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2009] [Accepted: 03/05/2010] [Indexed: 11/20/2022] Open
Abstract
Streptococcus mutans is a key contributor to the formation of the extracellular polysaccharide (EPS) matrix in dental biofilms. The exopolysaccharides, which are mostly glucans synthesized by streptococcal glucosyltransferases (Gtfs), provide binding sites that promote accumulation of microorganisms on the tooth surface and further establishment of pathogenic biofilms. This study explored (i) the role of S. mutans Gtfs in the development of the EPS matrix and microcolonies in biofilms, (ii) the influence of exopolysaccharides on formation of microcolonies, and (iii) establishment of S. mutans in a multispecies biofilm in vitro using a novel fluorescence labeling technique. Our data show that the ability of S. mutans strains defective in the gtfB gene or the gtfB and gtfC genes to form microcolonies on saliva-coated hydroxyapatite surfaces was markedly disrupted. However, deletion of both gtfB (associated with insoluble glucan synthesis) and gtfC (associated with insoluble and soluble glucan synthesis) is required for the maximum reduction in EPS matrix and biofilm formation. S. mutans grown with sucrose in the presence of Streptococcus oralis and Actinomyces naeslundii steadily formed exopolysaccharides, which allowed the initial clustering of bacterial cells and further development into highly structured microcolonies. Concomitantly, S. mutans became the major species in the mature biofilm. Neither the EPS matrix nor microcolonies were formed in the presence of glucose in the multispecies biofilm. Our data show that GtfB and GtfC are essential for establishment of the EPS matrix, but GtfB appears to be responsible for formation of microcolonies by S. mutans; these Gtf-mediated processes may enhance the competitiveness of S. mutans in the multispecies environment in biofilms on tooth surfaces.
Collapse
Affiliation(s)
- H. Koo
- Center for Oral Biology, University of Rochester Medical Center, Rochester, New York, Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, New York, Department of Preventive Dentistry, School of Dentistry and Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
| | - J. Xiao
- Center for Oral Biology, University of Rochester Medical Center, Rochester, New York, Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, New York, Department of Preventive Dentistry, School of Dentistry and Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
| | - M. I. Klein
- Center for Oral Biology, University of Rochester Medical Center, Rochester, New York, Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, New York, Department of Preventive Dentistry, School of Dentistry and Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
| | - J. G. Jeon
- Center for Oral Biology, University of Rochester Medical Center, Rochester, New York, Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, New York, Department of Preventive Dentistry, School of Dentistry and Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
| |
Collapse
|
22
|
Koo H, Duarte S, Murata RM, Scott-Anne K, Gregoire S, Watson GE, Singh AP, Vorsa N. Influence of cranberry proanthocyanidins on formation of biofilms by Streptococcus mutans on saliva-coated apatitic surface and on dental caries development in vivo. Caries Res 2010; 44:116-26. [PMID: 20234135 DOI: 10.1159/000296306] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2009] [Accepted: 01/27/2010] [Indexed: 11/19/2022] Open
Abstract
Cranberry crude extracts, in various vehicles, have shown inhibitory effects on the formation of oral biofilms in vitro. The presence of proanthocyanidins (PAC) in cranberry extracts has been linked to biological activities against specific virulence attributes of Streptococcus mutans, e.g. the inhibition of glucosyltransferase (Gtf) activity. The aim of the present study was to determine the influence of a highly purified and chemically defined cranberry PAC fraction on S. mutans biofilm formation on saliva-coated hydroxyapatite surface, and on dental caries development in Sprague-Dawley rats. In addition, we examined the ability of specific PAC (ranging from low-molecular-weight monomers and dimers to high-molecular-weight oligomers/polymers) to inhibit GtfB activity and glycolytic pH drop by S. mutans cells, in an attempt to identify specific bioactive compounds. Topical applications (60-second exposure, twice daily) with PAC (1.5 mg/ml) during biofilm formation resulted in less biomass and fewer insoluble polysaccharides than the biofilms treated with vehicle control had (10% ethanol, v/v; p < 0.05). The incidence of smooth-surface caries in rats was significantly reduced by PAC treatment (twice daily), and resulted in less severe carious lesions compared to the vehicle control group (p < 0.05); the animals treated with PAC also showed significantly less caries severity on sulcal surfaces (p < 0.05). Furthermore, specific A-type PAC oligomers (dimers to dodecamers; 0.1 mg/ml) effectively diminished the synthesis of insoluble glucans by GtfB adsorbed on a saliva-coated hydroxyapatite surface, and also affected bacterial glycolysis. Our data show that cranberry PAC reduced the formation of biofilms by S. mutans in vitro and dental caries development in vivo, which may be attributed to the presence of specific bioactive A-type dimers and oligomers.
Collapse
Affiliation(s)
- H Koo
- Eastman Department of Dentistry, University of Rochester Medical Center, Rochester, NY 14620, USA. hyun_koo @ urmc.rochester.edu
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Xiao J, Koo H. Structural organization and dynamics of exopolysaccharide matrix and microcolonies formation by Streptococcus mutans in biofilms. J Appl Microbiol 2009; 108:2103-13. [PMID: 19941630 DOI: 10.1111/j.1365-2672.2009.04616.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To investigate the structural organization and dynamics of exopolysaccharides (EPS) matrix and microcolonies formation by Streptococcus mutans during the biofilm development process. METHODS AND RESULTS Biofilms of Strep. mutans were formed on saliva-coated hydroxyapatite (sHA) discs in the presence of glucose or sucrose (alone or mixed with starch). At specific time points, biofilms were subjected to confocal fluorescence imaging and computational analysis. EPS matrix was steadily formed on sHA surface in the presence of sucrose during the first 8 h followed by a threefold biomass increase between 8 and 30 h of biofilm development. The initial formation and further development of three-dimensional microcolony structure occurred concomitantly with EPS matrix synthesis. Tridimensional renderings showed EPS closely associated with microcolonies throughout the biofilm development process forming four distinct domains (i) between sHA surface and microcolonies, (ii) within, (iii) covering and (iv) filling the spaces between microcolonies. The combination of starch and sucrose resulted in rapid formation of elevated amounts of EPS matrix and faster assembly of microcolonies by Strep. mutans, which altered their structural organization and susceptibility of the biofilm to acid killing (vs sucrose-grown biofilms; P < 0.05). CONCLUSIONS Our data indicate that EPS modulate the development, sequence of assembly and spatial distribution of microcolonies by Strep. mutans. SIGNIFICANCE AND IMPACT OF THE STUDY Simultaneous visualization and analysis of EPS matrix and microcolonies provide a more precise examination of the structural organization of biofilms than labelling bacteria alone, which could be a useful approach to elucidate the exact mechanisms by which Strep. mutans influences oral biofilm formation and possibly identify novel targets for effective antibiofilm therapies.
Collapse
Affiliation(s)
- J Xiao
- Eastman Department of Dentistry, University of Rochester, Rochester, NY 14642, USA
| | | |
Collapse
|
24
|
Jeon JG, Klein MI, Xiao J, Gregoire S, Rosalen PL, Koo H. Influences of naturally occurring agents in combination with fluoride on gene expression and structural organization of Streptococcus mutans in biofilms. BMC Microbiol 2009; 9:228. [PMID: 19863808 PMCID: PMC2774857 DOI: 10.1186/1471-2180-9-228] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2009] [Accepted: 10/28/2009] [Indexed: 11/29/2022] Open
Abstract
Background The association of specific bioactive flavonoids and terpenoids with fluoride can modulate the development of cariogenic biofilms by simultaneously affecting the synthesis of exopolysaccharides (EPS) and acid production by Streptococcus mutans, which enhanced the cariostatic effectiveness of fluoride in vivo. In the present study, we further investigated whether the biological actions of combinations of myricetin (flavonoid), tt-farnesol (terpenoid) and fluoride can influence the expression of specific genes of S. mutans within biofilms and their structural organization using real-time PCR and confocal fluorescence microscopy. Results Twice-daily treatment (one-minute exposure) during biofilm formation affected the gene expression by S. mutans both at early (49-h) and later (97-h) stages of biofilm development. Biofilms treated with combination of agents displayed lower mRNA levels for gtfB and gtfD (associated with exopolysaccharides synthesis) and aguD (associated with S. mutans acid tolerance) than those treated with vehicle-control (p < 0.05). Furthermore, treatment with combination of agents markedly affected the structure-architecture of S. mutans biofilms by reducing the biovolume (biomass) and proportions of both EPS and bacterial cells across the biofilm depth, especially in the middle and outer layers (vs. vehicle-control, p < 0.05). The biofilms treated with combination of agents were also less acidogenic, and had reduced amounts of extracellular insoluble glucans and intracellular polysaccharides than vehicle-treated biofilms (p < 0.05). Conclusion The data show that the combination of naturally-occurring agents with fluoride effectively disrupted the expression of specific virulence genes, structural organization and accumulation of S. mutans biofilms, which may explain the enhanced cariostatic effect of our chemotherapeutic approach.
Collapse
Affiliation(s)
- Jae-Gyu Jeon
- Center for Oral Biology, University of Rochester Medical Center, Rochester, New York, USA.
| | | | | | | | | | | |
Collapse
|
25
|
Lima EMCX, Koo H, Vacca Smith AM, Rosalen PL, Del Bel Cury AA. Adsorption of salivary and serum proteins, and bacterial adherence on titanium and zirconia ceramic surfaces. Clin Oral Implants Res 2008; 19:780-5. [DOI: 10.1111/j.1600-0501.2008.01524.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
26
|
Characteristics of biofilm formation by Streptococcus mutans in the presence of saliva. Infect Immun 2008; 76:4259-68. [PMID: 18625741 DOI: 10.1128/iai.00422-08] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Interactions between salivary agglutinin and the adhesin P1 of Streptococcus mutans contribute to bacterial aggregation and mediate sucrose-independent adherence to tooth surfaces. We have examined biofilm formation by S. mutans UA159, and derivative strains carrying mutations affecting the localization or expression of P1, in the presence of fluid-phase or adsorbed saliva or salivary agglutinin preparations. Whole saliva- and salivary agglutinin-induced aggregation of S. mutans was adversely affected by the loss of P1 and sortase (SrtA) but not by the loss of trigger factor (RopA). Fluid-phase salivary agglutinin and, to a lesser extent, immobilized agglutinin inhibited biofilm development by S. mutans in the absence of sucrose, and whole saliva was more effective at decreasing biofilm formation than salivary agglutinin. Inhibition of biofilm development by salivary agglutinin was differently influenced by particular mutations, with the P1-deficient strain displaying a greater inhibition of biofilm development than the SrtA- or RopA-deficient strains. As expected, biofilm-forming capacities of all strains in the presence of salivary preparations were markedly enhanced in the presence of sucrose, although biofilm formation by the mutants was less efficient than that by the parental strain. Aeration strongly inhibited biofilm development, and the presence of salivary components did not restore biofilm formation in aerated conditions. The results disclose a potent ability of salivary constituents to moderate biofilm formation by S. mutans through P1-dependent and P1-independent pathways.
Collapse
|
27
|
Thimothe J, Bonsi IA, Padilla-Zakour OI, Koo H. Chemical characterization of red wine grape (Vitis vinifera and Vitis interspecific hybrids) and pomace phenolic extracts and their biological activity against Streptococcus mutans. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:10200-10207. [PMID: 17999462 DOI: 10.1021/jf0722405] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Grapes are rich sources of potentially bioactive polyphenols. However, the phenolic content is variable depending on grape variety, and may be modified during vinification. In this study, we examined the chemical composition and biological activity of phenolic extracts prepared from several red wine grape varieties and their fermented byproduct of winemaking (pomace) on some of the virulence properties of Streptococcus mutans a well-known dental pathogen. Grape phenolic extracts were obtained from Vitis vinifera varieties Cabernet Franc and Pinot Noir and Vitis interspecific hybrid varieties Baco Noir and Noiret. The anthocyanins and flavan-3-ols content were highly variable depending on grape variety and type of extract (whole fruit vs fermented pomace). Nevertheless, all grape phenolic extracts remarkably inhibited glucosyltransferases B and C (70-85% inhibition) at concentrations as low as 62.5 microg/mL (P < 0.01). Furthermore, the glycolytic pH-drop by S. mutans cells was inhibited by the grape extracts without affecting the bacterial viability; an effect that can be attributed to partial inhibition of F-ATPase activity (30-65% inhibition at 125 microg/mL; P < 0.01). The biological activity of fermented pomace was either as effective as or significantly better than whole fruit grape extracts. The results showed that grape phenolic extracts, especially from pomace, are highly effective against specific virulence traits of S. mutans despite major differences in their phenolic content.
Collapse
Affiliation(s)
- Joanne Thimothe
- Eastman Department of Dentistry and Center for Oral Biology, University of Rochester Medical Center, Rochester, New York 14620, USA
| | | | | | | |
Collapse
|
28
|
Vacca Smith A, Scott-Anne K, Whelehan M, Berkowitz R, Feng C, Bowen W. Salivary glucosyltransferase B as a possible marker for caries activity. Caries Res 2007; 41:445-50. [PMID: 17827962 PMCID: PMC2820324 DOI: 10.1159/000107930] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2006] [Accepted: 04/11/2007] [Indexed: 11/19/2022] Open
Abstract
Bacteria-derived glucosyltransferases (Gtf) (EC 2.4.1.5), through synthesizing glucan polymers from sucrose and starch hydrolysates, play an essential role in the etiology and pathogenesis of caries. We attempted to correlate the levels of Gtf in whole saliva with the prevalence of carious lesions in young children. We examined saliva from children who were either free of overt carious lesions, or had severe early childhood caries (mean dmfs = 18.72 +/- 9.0 SD), for Gtf by direct enzyme assay. The levels of GtfB, GtfC and GtfD from Streptococcus mutans in the saliva using monoclonal/specific antibodies in an enzyme-linked immunosorbent assay were determined. Multiple logistic regression analyses with model selection showed that GtfB levels correlated with dmfs values of the subjects (p = 0.006). There was no correlation between total Gtf activity as measured by direct enzyme assay and dmfs values. There was a strong correlation between mutans streptococci populations in saliva and caries activity. Collectively, these data show that GtfB levels in saliva correlate strongly with presence of clinical caries and with number of carious lesions in young children. It is also possible to measure different Gtfs, separately, in whole saliva. These observations may have important clinical implications, may lead to development of a chair side caries activity test and support the importance of GtfB in the pathogenesis of dental caries.
Collapse
Affiliation(s)
- A.M. Vacca Smith
- Department of Microbiology and Immunology, University of Rochester, Rochester, N.Y., USA
| | - K.M. Scott-Anne
- Center for Oral Biology, University of Rochester, Rochester, N.Y., USA
| | - M.T. Whelehan
- Eastman Department of Dentistry and University of Rochester, Rochester, N.Y., USA
| | - R.J. Berkowitz
- Eastman Department of Dentistry and University of Rochester, Rochester, N.Y., USA
| | - C. Feng
- Department of Biostatistics and Computational Biology, University of Rochester, Rochester, N.Y., USA
| | - W.H. Bowen
- Center for Oral Biology, University of Rochester, Rochester, N.Y., USA
- *William H. Bowen, BDS, PhD, University of Rochester, Center for Oral Biology, 601 Elmwood Avenue, Box 611, Rochester, NY 14642 (USA), Tel. +1 585 275 0772, Fax +1 585 276 0190, E-Mail
| |
Collapse
|
29
|
Gregoire S, Singh A, Vorsa N, Koo H. Influence of cranberry phenolics on glucan synthesis by glucosyltransferases and Streptococcus mutans acidogenicity. J Appl Microbiol 2007; 103:1960-8. [DOI: 10.1111/j.1365-2672.2007.03441.x] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
30
|
Park WK, Chung JW, Kim YK, Chung SC, Kho HS. Influences of animal mucins on lysozyme activity in solution and on hydroxyapatite surfaces. Arch Oral Biol 2006; 51:861-9. [PMID: 16716246 DOI: 10.1016/j.archoralbio.2006.04.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2005] [Revised: 10/23/2005] [Accepted: 04/06/2006] [Indexed: 11/30/2022]
Abstract
The purpose of this study was to investigate the influence of animal mucins on lysozyme activity in solution and on the surface of hydroxyapatite (HA) beads. The effects of animal mucins on lysozyme activity in solution were examined by incubating porcine gastric mucin (PGM) or bovine submaxillary mucin (BSM) with hen egg-white lysozyme (HEWL) or salivary samples. HA-immobilised animal mucins or lysozyme were used to determine the influence of animal mucins on lysozyme activity on HA surfaces. Lysozyme activity was determined by turbidity measurement of a Micrococcus lysodeikticus substrate suspension. Protein concentration was determined by ninhydrin assay. PGM inhibited the activity of HEWL and salivary lysozyme in solution. The amount of inhibition was dependent on mucin concentration, incubation time and temperature, and the structural integrity of the mucin. The inhibition of salivary lysozyme activity by PGM was greater in submandibular/sublingual saliva than in parotid saliva. The inhibition of lysozyme activity by PGM was markedly dependent on pH. However, BSM did not inhibit the in-solution lysozyme activities of HEWL and clarified saliva. Both PGM and BSM bound to HA surfaces, and HA-adsorbed animal mucins increased the subsequent adsorption of lysozyme. When HA beads were exposed to a mixture of HEWL and PGM or BSM, lysozyme activity on the HA surfaces was significantly increased. The results suggest that animal mucins affect lysozyme activity, and the effects are different on HA surfaces compared with in solution. Further research is needed to determine the effect of animal mucins on lysozyme activity in vivo.
Collapse
Affiliation(s)
- Won-Kyu Park
- Department of Oral Medicine and Oral Diagnosis, School of Dentistry and Dental Research Institute, Seoul National University, Yunkeun-Dong 28, Chongro-Ku, Seoul 110-749, South Korea
| | | | | | | | | |
Collapse
|
31
|
Shemesh M, Steinberg D. In vitro binding interactions of oral bacteria with immobilized fructosyltransferase. J Appl Microbiol 2006; 100:871-7. [PMID: 16553744 DOI: 10.1111/j.1365-2672.2006.02880.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIMS The objective of the present study was to explore the role of immobilized fructosyltransferase (FTF) in adhesion process. METHODS AND RESULTS We investigated real-time biospecific interactions between several types of oral bacteria and recombinant FTF immobilized on a biosensor chip, using surface plasmon resonance technology. Streptococcus mutans, Streptococcus sobrinus and Actinomyces viscosus demonstrated significant binding to FTF. Actinomyces viscosus had a greater binding to FTF, with 373 Resonance Units (RU), than the other tested bacteria. The binding level to FTF of Strep. sobrinus was 320 RU, whereas Strep. mutans and Streptococcus salivarious show binding of 296 and 245 RU, respectively. The binding sensograms displayed different profiles for the tested bacteria at various cell density, suggesting a different affinity to immobilized FTF. CONCLUSIONS The results from this study suggest that FTF may influence bacterial adherence and colonization of the dental biofilm. SIGNIFICANCE AND IMPACT OF THE STUDY The biomolecular interaction analysis enables real-time monitoring of the interaction between adhesions of intact bacteria and their ligands, which might be crucial in the initial phase of biofilm development in vivo.
Collapse
Affiliation(s)
- M Shemesh
- Institute of Dental Sciences, Faculty of Dentistry, Hebrew University-Hadassah, Jerusalem, Israel
| | | |
Collapse
|
32
|
Duarte S, Gregoire S, Singh AP, Vorsa N, Schaich K, Bowen WH, Koo H. Inhibitory effects of cranberry polyphenols on formation and acidogenicity ofStreptococcus mutansbiofilms. FEMS Microbiol Lett 2006; 257:50-6. [PMID: 16553831 DOI: 10.1111/j.1574-6968.2006.00147.x] [Citation(s) in RCA: 161] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Cranberry fruit is a rich source of polyphenols, and has shown biological activities against Streptococcus mutans. In the present study, we examined the influence of extracts of flavonols (FLAV), anthocyanins (A) and proanthocyanidins (PAC) from cranberry on virulence factors involved in Streptococcus mutans biofilm development and acidogenicity. PAC and FLAV, alone or in combination, inhibited the surface-adsorbed glucosyltransferases and F-ATPases activities, and the acid production by S. mutans cells. Furthermore, biofilm development and acidogenicity were significantly affected by topical applications of PAC and FLAV (P<0.05). Anthocyanins were devoid of any significant biological effects. The flavonols are comprised of mostly quercetin glycosides, and the PAC are largely A-type oligomers of epicatechin. Our data show that proanthocyanidins and flavonols are the active constituents of cranberry against S. mutans.
Collapse
Affiliation(s)
- Simone Duarte
- Eastman Department of Dentistry Center for Oral Biology, University of Rochester Medical Center, Rochester, NY, USA
| | | | | | | | | | | | | |
Collapse
|
33
|
Tam A, Shemesh M, Wormser U, Sintov A, Steinberg D. Effect of different iodine formulations on the expression and activity of Streptococcus mutans glucosyltransferase and fructosyltransferase in biofilm and planktonic environments. J Antimicrob Chemother 2006; 57:865-71. [PMID: 16549514 DOI: 10.1093/jac/dkl085] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES The glucosyltransferase (GTF) and fructosyltransferase (FTF) enzymes play a pivotal role in dental biofilm formation as they synthesize polysaccharides that act as the extracellular matrix of the biofilm. Iodine is a unique antibacterial agent that has distinct properties from other conventional antibacterial agents. In this study we have examined the effect of iodine and povidone iodine (PI) on gtf and ftf expression in biofilm and planktonic environments and on immobilized and unbound GTF and FTF activity. METHODS Real-time reverse transcription-PCR was used to investigate the effect of iodine and PI on ftf, gtfB and gtfC expression. The effect of iodine and PI on GTF and FTF activity was tested using radioactive assays. RESULTS Our results indicate that iodine and PI in a tetraglycol carrier cause enhancement of expression of gtfB in Streptococcus mutans in biofilms but not in planktonic bacteria. PI in water induced expression of gtfB and gtfC in planktonic bacteria. However, iodine and PI strongly inhibit polysaccharide production by GTF and to a lesser extent by FTF activity. The inhibitory effect on GTF activity was similar in solution compared to its activity in the immobilized environment. This unique effect may be attributed to the distinct chemical properties of iodine compared with other antibacterial agents. CONCLUSIONS This study indicates that iodine at sub-bactericidal concentrations demonstrates molecular and enzymatic effects that are highly associated with biofilm formation.
Collapse
Affiliation(s)
- Avshalom Tam
- Institute of Dental Sciences, Faculty of Dentistry, Hebrew University-Hadassah, Jerusalem, Israel
| | | | | | | | | |
Collapse
|
34
|
Jabbour A, Srebnik M, Zaks B, Dembitsky V, Steinberg D. Evaluation of oxazaborolidine activity on Streptococcus mutans biofilm formation. Int J Antimicrob Agents 2005; 26:491-6. [PMID: 16280242 DOI: 10.1016/j.ijantimicag.2005.08.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2005] [Accepted: 08/07/2005] [Indexed: 11/16/2022]
Abstract
Dental diseases are among the most prevalent afflictions of humankind. These diseases are associated with the formation of biofilms harbouring pathogenic bacteria. Eight different derivatives of oxazaborolidines were synthesised and evaluated for their affect on Streptococcus mutans adhesion and biofilm formation. Structure-activity relationship was observed. The B-butyl moiety of the oxazaborolidines contributed an anti-adhesion effect for all derivatives, whilst its effect diminished when the boron atom was incorporated in a fused heterocyclic ring. The B-phenyl group induced bacterial adhesion in all tested compounds Oxazaborolidines may serve as novel agents for affecting oral biofilm formation. Moreover, the ability to alter the oxazaborolidine molecule and thus affect biofilms offers an excellent opportunity to study biofilm formation.
Collapse
Affiliation(s)
- Adel Jabbour
- Institute of Dental Sciences, Faculty of Dentistry, Hebrew University-Hadassah, P.O.B 12272, Jerusalem, 91120 Israel
| | | | | | | | | |
Collapse
|
35
|
Hayacibara MF, Koo H, Rosalen PL, Duarte S, Franco EM, Bowen WH, Ikegaki M, Cury JA. In vitro and in vivo effects of isolated fractions of Brazilian propolis on caries development. JOURNAL OF ETHNOPHARMACOLOGY 2005; 101:110-5. [PMID: 15913934 DOI: 10.1016/j.jep.2005.04.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2004] [Revised: 03/18/2005] [Accepted: 04/07/2005] [Indexed: 05/02/2023]
Abstract
Recently, two chemically different types of Brazilian propolis (type-3 and -12) were shown to have cariostatic properties. This study aimed to evaluate the influence of their isolated fractions on mutans streptococci viability, glucosyltransferases (GTFs) activity and caries development in rats. The ethanolic extracts of propolis (EEPs) were serially fractionated into hexane (H-fr), chloroform, ethyl acetate, and ethanol. The ability of the four fractions and EEP to inhibit Streptococcus mutans and Streptococcus sobrinus growth and adherence to a glass surface was examined. The effect on GTFs B and C activity was also determined. For the caries study, 60 Wistar rats infected with Streptococcus sobrinus were treated topically twice daily as follows: (1) EEP type-3, (2) H-fr type-3, (3) EEP type-12, (4) H-fr type-12, and (5) control. In general, the H-fr from both types of propolis showed the highest antibacterial activity and GTFs inhibition. Furthermore, the EEP and H-fr type-3 and -12 were equally effective in reducing dental caries in rats. The data suggest that the putative cariostatic compounds of propolis type-3 and -12 are mostly non-polar; and H-fr should be the fraction of choice for identifying further potentially novel anti-caries agents.
Collapse
Affiliation(s)
- Mitsue F Hayacibara
- Department of Physiological Sciences, Dentistry Faculty of Piracicaba, State University of Campinas, Av. Limeira, 901 PIRACICABA-SP, CEP: 13414-903, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Kho HS, Vacca Smith AM, Koo H, Scott-Anne K, Bowen WH. Interactions of Streptococcus mutans glucosyltransferase B with lysozyme in solution and on the surface of hydroxyapatite. Caries Res 2005; 39:411-6. [PMID: 16110214 DOI: 10.1159/000086849] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2004] [Accepted: 12/09/2004] [Indexed: 11/19/2022] Open
Abstract
Several active enzymes have been identified as components of acquired enamel pellicle. In the present study, the interactions of Streptococcus mutans glucosyltransferase B (GtfB) with lysozyme in solution and on the surface of hydroxyapatite (HA) beads were studied. Experiments were also performed to investigate whether structural differences exist between glucans formed by GtfB enzyme in the presence or absence of lysozyme in solution and on the surface of HA. Hen egg-white lysozyme (HEWL) and saliva were used as the sources of lysozyme; lysozyme-depleted saliva was used as control. Lysozyme activity was significantly reduced when adsorbed onto HA beads compared with that in solution. The GtfB enzyme did not affect the activity of lysozyme in solution or that of adsorbed lysozyme onto HA. The presence of HEWL increased GtfB activity; bovine serum albumin had an even greater enhancing effect. Depletion of lysozyme from whole saliva increased GtfB activity in solution, but not on the surface of saliva-coated HA. The presence of lysozyme affected the amount of glucan formation by GtfB, but not the structure of glucans formed in solution and on the surface. Therefore, the interaction of lysozyme and GtfB enzymes on HA surface may modulate the formation of glucan and dental plaque.
Collapse
Affiliation(s)
- H-S Kho
- University of Rochester, Center for Oral Biology, Rochester, New York, N.Y., USA.
| | | | | | | | | |
Collapse
|
37
|
Hayacibara MF, Koo H, Vacca-Smith AM, Kopec LK, Scott-Anne K, Cury JA, Bowen WH. The influence of mutanase and dextranase on the production and structure of glucans synthesized by streptococcal glucosyltransferases. Carbohydr Res 2005; 339:2127-37. [PMID: 15280057 DOI: 10.1016/j.carres.2004.05.031] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2004] [Accepted: 05/12/2004] [Indexed: 11/25/2022]
Abstract
Glucanohydrolases, especially mutanase [alpha-(1-->3) glucanase; EC 3.2.1.59] and dextranase [alpha-(1-->6) glucanase; EC 3.2.1.11], which are present in the biofilm known as dental plaque, may affect the synthesis and structure of glucans formed by glucosyltransferases (GTFs) from sucrose within dental plaque. We examined the production and the structure of glucans synthesized by GTFs B (synthesis of alpha-(1-->3)-linked glucans) or C [synthesis of alpha-(1-->6)- and alpha-(1-->3)-linked glucans] in the presence of mutanase and dextranase, alone or in combination, in solution phase and on saliva-coated hydroxyapatite beads (surface phase). The ability of Streptococcus sobrinus 6715 to adhere to the glucan, which was formed in the presence of the glucanohydrolases was also explored. The presence of mutanase and/or dextranase during the synthesis of glucans by GTF B and C altered the proportions of soluble to insoluble glucan. The presence of either dextranase or mutanase alone had a modest effect on total amount of glucan formed, especially in the surface phase; the glucanohydrolases in combination reduced the total amount of glucan. The amount of (1-->6)-linked glucan was reduced in presence of dextranase. In contrast, mutanase enhanced the formation of soluble glucan, and reduced the percentage of 3-linked glucose of GTF B and C glucans whereas dextranase was mostly without effect. Glucan formed in the presence of dextranase provided fewer binding sites for S. sobrinus; mutanase was devoid of any effect. We also noted that the GTFs bind to dextranase and mutanase. Glucanohydrolases, even in the presence of GTFs, influence glucan synthesis, linkage remodeling, and branching, which may have an impact on the formation, maturation, physical properties, and bacterial binding sites of the polysaccharide matrix in dental plaque. Our data have relevance for the formation of polysaccharide matrix of other biofilms.
Collapse
Affiliation(s)
- Mitsue F Hayacibara
- Faculty of Dentistry of Piracicaba, UNICAMP, Piracicaba, São Paulo 13414-018, Brazil
| | | | | | | | | | | | | |
Collapse
|
38
|
Abstract
The acquired pellicle is a biofilm, free of bacteria, covering oral hard and soft tissues. It is composed of mucins, glycoproteins and proteins, among which are several enzymes. This review summarizes the present state of research on enzymes and their functions in the dental pellicle. Theoretically, all enzymes present in the oral cavity could be incorporated into the pellicle, but apparently enzymes are adsorbed selectively onto dental surfaces. There is clear evidence that enzymes are structural elements of the pellicle. Thereby they exhibit antibacterial properties but also facilitate bacterial colonization of dental hard tissues. Moreover, the immobilized enzymes are involved in modification and in homeostasis of the salivary pellicle. It has been demonstrated that amylase, lysozyme, carbonic anhydrases, glucosyltransferases and fructosyltransferase are immobilized in an active conformation in the pellicle layer formed in vivo. Other enzymes, such as peroxidase or transglutaminase, have been investigated in experimental pellicles. Despite the depicted impact of enzymes on the formation and function of pellicle, broader knowledge on their properties in the in vivo-formed pellicle is required. This might be beneficial in the development of new preventive and diagnostic strategies.
Collapse
Affiliation(s)
- Christian Hannig
- Department of Operative Dentistry, Preventive Dentistry and Periodontology, University of Göttingen, Robert-Koch-Strasse 40, D-37075 Göttingen, Germany.
| | | | | |
Collapse
|
39
|
Steinberg D, Feldman M, Ofek I, Weiss EI. Cranberry high molecular weight constituents promote Streptococcus sobrinus desorption from artificial biofilm. Int J Antimicrob Agents 2005; 25:247-51. [PMID: 15737520 DOI: 10.1016/j.ijantimicag.2004.10.014] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2004] [Accepted: 10/06/2004] [Indexed: 10/25/2022]
Abstract
Dental biofilm harbouring oral bacteria is highly correlated with the progression of dental diseases. Disruption of biofilm formation via anti-adhesion agents is an alternative means to the antibacterial approach. Previous studies have shown that high molecular weight non-dialysable material (NDM) derived from cranberry juice inhibits the adhesion of Escherichia coli and the coaggregation of a variety of oral bacteria. In addition, it inhibits the formation of glucans and fructans synthesised by GTF and FTF. In the present study, we examined the anti-adhesion effect of NDM on S. sobrinus. NDM promoted desorption of S. sobrinus from biofilm in the presence and absence of extracellular glucans and fructans, although the effect was more pronounced in the absence of these polysaccharides. Precoating of the bacteria with NDM reduced their ability to form biofilm. Our results indicate that NDM could be exploited as an anti-biofilm agent.
Collapse
Affiliation(s)
- Doron Steinberg
- Institute of Dental Sciences, Faculty of Dentistry, Hebrew University--Hadassah, P.O. Box 12272, Jerusalem 91120, Israel.
| | | | | | | |
Collapse
|
40
|
Jun L, Jifang S, Miaoquan L, Yingyan L, Xihong X. Effects of Magnolol and Honokiol on the activities of streptococcal glucosyltransferases both in solution and adsorbed on an experimental pellicle. Lett Appl Microbiol 2004; 39:459-65. [PMID: 15482438 DOI: 10.1111/j.1472-765x.2004.01610.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS To investigate the inhibitory effects of Magnolol and Honokiol on the activity of streptococcal glucosyltransferases (Gtfs). METHODS AND RESULTS The effect of Magnolol and Honokiol that inhibits the activities of streptococcal GtfB, GtfC, GtfD and GtfS was explored with standard assays. The results showed that both samples can efficiently inhibit the activity of all Gtfs in solution (66.4-96.3%) and adsorbed on the surface of saliva-coated hydroxyapatite (sHA) beads (65.5-92.7%) at concentrations between 1.25 and 5.0 mg ml(-1). Furthermore, Magnolol had a stronger inhibition of four kinds of Gtfs than Honokiol both in solution and adsorbed on the surface of sHA beads at concentrations between 0.04 and 0.63 mg ml(-1) (P < 0.05). CONCLUSIONS Magnolol had significant effects on the activities of streptococcal Gtfs. SIGNIFICANCE AND IMPACT OF THE STUDY Magnolol as a natural herb can be developed into a new oral hygiene product to prevent plaque formation.
Collapse
Affiliation(s)
- L Jun
- Division of Infectious Disease, 1st Affiliated Hospital, Medical College of Zhejiang University, Qingchun Rd. 79, Hangzhou, China.
| | | | | | | | | |
Collapse
|
41
|
Zhu Q, Quivey RG, Berger AJ. Measurement of bacterial concentration fractions in polymicrobial mixtures by Raman microspectroscopy. JOURNAL OF BIOMEDICAL OPTICS 2004; 9:1182-1186. [PMID: 15568938 DOI: 10.1117/1.1803844] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Relative concentrations of Streptococcus mutans and Streptococcus sanguis are important parameters in the study of dental caries, but current methods of measuring these concentrations are time consuming and prone to inaccuracies. We investigate the use of Raman spectroscopy for measuring relative concentrations of these two bacterial species in solid mixtures. To our knowledge, this is the first time Raman spectroscopy has been used to analyze bacterial mixtures rather than to identify the species of a pure colony. Mixtures of the two streptococcal species in various ratios are measured for 200 s using a home-built Raman microscope. Spectral correlations with bacterial content were identified via partial least-squares analysis. The relative concentrations of S. mutans in subsequent samples are predicted with a root mean squared error below 5%. In clinical plaque samples, this sort of accuracy would enable discrimination between normal and dangerously elevated levels of S. mutans. Samples with and without salivary proteins are predicted with equal accuracy. This result shows the potential of Raman spectroscopy for analyzing mixed populations of bacteria, such as those that occur in oral plaques.
Collapse
Affiliation(s)
- Qingyuan Zhu
- University of Rochester, Department of Electrical Engineering and The Institute of Optics, Rochester, NY 14627, USA
| | | | | |
Collapse
|
42
|
Bowen WH. Do we need to be concerned about dental caries in the coming millennium? CRITICAL REVIEWS IN ORAL BIOLOGY AND MEDICINE : AN OFFICIAL PUBLICATION OF THE AMERICAN ASSOCIATION OF ORAL BIOLOGISTS 2003; 13:126-31. [PMID: 12097355 DOI: 10.1177/154411130201300203] [Citation(s) in RCA: 126] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Dental caries continues to be a pubic health problem despite claims that 50% of schoolchildren are caries-free. There are widespread variations in the prevalence of caries worldwide. Caries lesions are the clinical manifestation of a pathogenic process that may have been occurring on the tooth surface for months or years. Acid production by bacteria embedded in a biofilm termed "dental plaque" is a key aspect of the pathogenesis of dental caries; nevertheless, the ability of micro-organisms to survive in a hostile acid milieu and the influence of fluoride and additional agents on this acid tolerance receive scant attention. Study of cariogenic micro-organisms largely has been limited to observations made on them in the planktonic state; clearly dental caries is essentially a surface phenomenon, and micro-organisms behave distinctively when grown on a surface. Although significant progress has been made in our understanding of the etiology, pathogenesis, and prevention of dental caries, it still remains a scientific and clinical enigma worthy of the attention of the best scientists.
Collapse
Affiliation(s)
- William H Bowen
- Center for Oral Biology, University of Rochester, Rochester, NY 14642, USA.
| |
Collapse
|
43
|
Koo H, Pearson SK, Scott-Anne K, Abranches J, Cury JA, Rosalen PL, Park YK, Marquis RE, Bowen WH. Effects of apigenin and tt-farnesol on glucosyltransferase activity, biofilm viability and caries development in rats. ORAL MICROBIOLOGY AND IMMUNOLOGY 2002; 17:337-43. [PMID: 12485324 DOI: 10.1034/j.1399-302x.2002.170602.x] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Propolis, a resinous hive product secreted by Apis mellifera bees, has been shown to reduce the incidence of dental caries in rats. Several compounds, mainly polyphenolics, have been identified in propolis. Apigenin and tt-farnesol demonstrated biological activity against mutans streptococci. We determined here their effects, alone or in combination, on glucosyltransferase activity, biofilm viability, and development of caries in rats. Sprague-Dawley rats were infected with Streptococcus sobrinus 6715 and treated topically twice daily as follows: (1) tt-farnesol, (2) apigenin, (3) vehicle control, (4) fluoride, (5) apigenin +tt-farnesol, and (6) chlorhexidine. Apigenin (1.33 mM) inhibited the activity of glucosyltransferases in solution (90-95%) and on the surface of saliva-coated hydroxyapatite beads (35-58%); it was devoid of antibacterial activity. tt-Farnesol (1.33 mM) showed modest antibacterial activity against biofilms and its effects on glucosyltransferases were minimal. The incidence of smooth-surface caries was significantly reduced by apigenin +tt-farnesol (60%), fluoride (70%), and chlorhexidine (72%) treatments compared to control (P < 0.05).
Collapse
Affiliation(s)
- H Koo
- Center for Oral Biology and Eastman Department of Dentistry, University of Rochester Medical Center, NY 14642, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Bronshteyn M, Steinberg D. Immobilization of fructosyltransferase from Streptococcus mutans on hydroxyapatite surfaces induces the formation of multimeric complexes. Lett Appl Microbiol 2002; 34:205-9. [PMID: 11874543 DOI: 10.1046/j.1472-765x.2002.01073.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS To investigate the formation of fructosyltransferase (FTF) complexes on hydroxyapatite (HA) surfaces. METHODS AND RESULTS Cell-free extracellular FTF from Streptococcus mutans, purified from hyperproducing strain V-1995, was adsorbed onto HA and then eluted from the surface by means of a concentration gradient of potassium phosphate buffer. The FTF monomers loaded onto HA formed, upon adsorption, various complexes ranging from 200 to 700 kDa as demonstrated using native PAGE. All these complexes exhibited enzymatic activity. CONCLUSIONS Adsorption of FTF onto HA induced the formation of stable and enzymatically-active complexes. SIGNIFICANCE AND IMPACT OF THE STUDY The formation of these complexes may explain the change of FTF catalytic properties after adsorption onto HA. This study is another step in determining the properties of a-cellular constituents of the oral biofilm.
Collapse
Affiliation(s)
- M Bronshteyn
- Department of Oral Biology, Faculty of Dentistry, Hebrew University-Hadassah, Jerusalem, Israel
| | | |
Collapse
|
45
|
Koo H, Rosalen PL, Cury JA, Park YK, Bowen WH. Effects of compounds found in propolis on Streptococcus mutans growth and on glucosyltransferase activity. Antimicrob Agents Chemother 2002; 46:1302-9. [PMID: 11959560 PMCID: PMC127145 DOI: 10.1128/aac.46.5.1302-1309.2002] [Citation(s) in RCA: 214] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Propolis, a resinous bee product, has been shown to inhibit the growth of oral microorganisms and the activity of bacterium-derived glucosyltransferases (GTFs). Several compounds, mainly polyphenolics, have been identified in this natural product. The present study evaluated the effects of distinct chemical groups found in propolis on the activity of GTF enzymes in solution and on the surface of saliva-coated hydroxyapatite (sHA) beads. Thirty compounds, including flavonoids, cinnamic acid derivatives, and terpenoids, were tested for the ability to inhibit GTFs B, C, and D from Streptococcus mutans and GTF from S. sanguinis (GTF Ss). Flavones and flavonols were potent inhibitors of GTF activity in solution; lesser effects were noted on insolubilized enzymes. Apigenin, a 4',5,7-trihydroxyflavone, was the most effective inhibitor of GTFs, both in solution (90.5 to 95% inhibition at a concentration of 135 microg/ml) and on the surface of sHA beads (30 to 60% at 135 microg/ml). Antibacterial activity was determined by using MICs, minimum bactericidal concentrations (MBCs), and time-kill studies. Flavanones and some dihydroflavonols, as well as the sesquiterpene tt-farnesol, inhibited the growth of S. mutans and S. sobrinus; tt-farnesol was the most effective antibacterial compound (MICs of 14 to 28 microg/ml and MBCs of 56 to 112 microg/ml). tt-Farnesol (56 to 112 microg/ml) produced a 3-log-fold reduction in the bacterial population after 4 h of incubation. Cinnamic acid derivatives had negligible biological activities. Several of the compounds identified in propolis inhibit GTF activities and bacterial growth. Apigenin is a novel and potent inhibitor of GTF activity, and tt-farnesol was found to be an effective antibacterial agent.
Collapse
Affiliation(s)
- Hyun Koo
- Center for Oral Biology and Eastman Department of Dentistry, University of Rochester Medical Center, Rochester, New York 14642, USA.
| | | | | | | | | |
Collapse
|
46
|
Steinberg D, Rozen R, Bromshteym M, Zaks B, Gedalia I, Bachrach G. Regulation of fructosyltransferase activity by carbohydrates, in solution and immobilized on hydroxyapatite surfaces. Carbohydr Res 2002; 337:701-10. [PMID: 11950466 DOI: 10.1016/s0008-6215(02)00033-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
We tested the effect of several carbohydrates on the activity of cell-free fructosyltransferases (FTF) in solution and immobilized onto hydroxyapatite (HA) and found an inhibitory dose-dependent effect of glucose on FTF activity, both on the surface and in solution. Glucose at 160 mM inhibits FTF activity by 75% both on HA and in solution. Fructose at 160 mM inhibited FTF activity by 25% in solution and by 15% on HA. Levan inhibited FTF activity by 30% in solution, while dextrans and inulin had a limited effect on FTF activity. Circular dichroism and infrared analysis demonstrated no major changes in the chemical structure of fructans synthesized by cell-free FTF on HA and in solution, in the presence or absence of glucose. However, as verified by size-exclusion chromatography, glucose inhibited the synthesis of high molecular-weight fructans. The results indicate that glucose, a byproduct of the FTF enzymatic reaction, is the main carbohydrate affecting FTF activity. Selective inhibition of high molecular-weight fructan production by glucose, may indicate that two mechanisms are involved in the synthesis of fructans, both in solution and on the surface.
Collapse
Affiliation(s)
- Doron Steinberg
- Department of Oral Biology, Faculty of Dentistry, Hebrew University-Hadassah, PO Box 12272, Jerusalem 91120, Israel.
| | | | | | | | | | | |
Collapse
|
47
|
Steinberg D, Eyal S. Early formation of Streptococcus sobrinus biofilm on various dental restorative materials. J Dent 2002; 30:47-51. [PMID: 11741735 DOI: 10.1016/s0300-5712(01)00058-6] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES To examine the formation of dental biofilm by Streptococcus sobrinus on different types of restorative materials, using a model consisting of host and bacterial constituents. METHODS The adsorption pattern of saliva to the restorative material was determined by means of gel electrophoresis coupled with computerized densitometry techniques. The amount of salivary proteins adsorbed onto the surfaces was measured using the Bradford method. Sucrose-dependent bacterial adhesion to the saliva-coated restorative material was tested by radioactive-labelled Streptococcus sobrinus, and viable counts of these bacteria in the biofilm was determined using bacterial culture techniques. RESULTS Different adsorption patterns by salivary proteins to restorative materials were recorded. Durafil and acrylic dental materials demonstrated the most affinity to salivary proteins. A surface dependent adhesion profile was recorded, showing a high affinity of albumin and amylase to Acrylic and Durafil materials. Bacterial accumulation was the highest with Fuji LC and Fuji GC, which also demonstrated the highest bacterial viability. CONCLUSIONS Our study demonstrates the specificity of biofilm formation on different brands of dental restorative materials. Formation of a variety of dental biofilms has a significant impact on the progression of dental diseases in the oral cavity.
Collapse
Affiliation(s)
- Doron Steinberg
- Department of Oral Biology, Faculty of Dentistry, Hebrew University-Hadassah, P.O. Box 12272, Jerusalem 91120, Israel.
| | | |
Collapse
|
48
|
Rozen R, Bachrach G, Bronshteyn M, Gedalia I, Steinberg D. The role of fructans on dental biofilm formation by Streptococcus sobrinus, Streptococcus mutans, Streptococcus gordonii and Actinomyces viscosus. FEMS Microbiol Lett 2001; 195:205-10. [PMID: 11179653 DOI: 10.1111/j.1574-6968.2001.tb10522.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Dental plaque biofilm plays a pivotal role in the progression of dental diseases. Polysaccharides are of great importance in the ecology of the dental biofilm. We studied the effect of fructans, glucans and a mixture of both fructans and glucans, synthesized in situ by immobilized fructosyltransferase or glucosyltransferase, on the adhesion of Streptococcus sobrinus, Streptococcus mutans, Streptococcus gordonii and Actinomyces viscosus to hydroxyapatite beads coated with human saliva (sHA). The adhesion of A. viscosus to sHA was found to be fructan-dependent. Adhesion of both S. sobrinus and S. mutans was found to be mediated mainly by glucans, while the adhesion of S. gordonii was found to be both glucan- and fructan-dependent. Treatment with fructanase prior to A. viscosus adhesion resulted in a significant reduction in adhesion to sHA, while adhesion of S. sobrinus, S. mutans and S. gordonii was slightly influenced by fructanase treatment. Treatment with fructanase after adhesion of S. gordonii to sHA resulted in a significant reduction in their adhesion to sHA. Our results show that fructans may play a role in the adhesion and colonization of several cariogenic bacteria to sHA, thus contributing to the formation of dental plaque biofilm.
Collapse
Affiliation(s)
- R Rozen
- Department of Oral Biology, Faculty of Dentistry, Hebrew University-Hadassah, P.O. Box 12272, Jerusalem 91120, Israel
| | | | | | | | | |
Collapse
|
49
|
Abstract
OBJECTIVE Previous studies have shown that glucosyltransferase enzymes (Gtfs) of Streptococcus mutans adsorbed to saliva coated hydroxyapatite (sHA) have distinct properties from the same enzymes in solution. The purpose of the present study was to determine the effects on enzyme activity of polyclonal antibodies raised to Gtfs in a soluble form and bound to sHA. MATERIALS AND METHODS Antiserum was raised in six New Zealand White rabbits using the purified glucosyltransferase enzymes (Gtfs) of S. mutans, GtfB, GtfC, or GtfD as soluble antigens or adsorbed to hydroxyapatite (HA, insolubilized). The antisera were examined for their ability to react to these Gtfs and Gtf from Streptococcus sanguis (GtfSs) in Western blot formats as well as inhibit enzyme activity in solution and insolubilized. RESULTS Antibodies raised against GtfB or GtfC detected all Gtf enzymes examined in Western blots; antibodies raised to GtfD reacted strongly to GtfD and GtfSs, poorly to GtfC, and was non-reactive with GtfB. Antibodies to GtfB or GtfC inhibited activity of GtfB and GtfC in solution by 90% or more. Enzyme activity adsorbed to sHA was inhibited from 70% to 80% by the same antisera. These same antibodies possessed no specific effect on the activities of either GtfD or GtfSs. Antibodies raised to the GtfD enzyme inhibited activity of GtfD (80% to 90% inhibition) and GtfSs activity (50% to 80%) in solution. In contrast the GtfD antibodies had no effect on the activity of either GtfB or GtfC enzymes in solution. Modest inhibitory effects were noted on GtfC and GtfSs enzymes bound to sHA, but no inhibition was observed for sHA-bound GtfB or GtfD. CONCLUSION These data show that some antibodies effective against enzymes in solution may have significantly lesser inhibitory effects against the same enzymes insolubilized. Further, presentation of Gtf antigen immobilized to HA has only a minor influence on the production of antibodies inhibitory to Gtf activity.
Collapse
Affiliation(s)
- D Wunder
- University of Rochester, Center for Oral Biology, 601 Elmwood Ave. Box 611, Rochester, NY 14642, USA
| | | |
Collapse
|
50
|
Abstract
The formation of acquired enamel pellicle on hydroxyapatite (HA) discs of known surface area carried in the mouth was studied; discs were carried in the mouth for 30 s, 1, 5, 10 and 20 min. Similar amounts of protein were found on the discs at each time-point, as determined by ninhydrin analyses. The amounts of amylase and lysozyme detected remained stable after 5 min of exposure of the discs to the mouth. Assay of the discs for fructosyl- and glucosyltransferase activities revealed that fructosyltransferase activity increased up to 1 min of exposure to the mouth and decreased when kept in the mouth for longer periods; glucosyltransferase activity, in contrast, increased the longer the discs were kept in the mouth. This in situ model provides insight into the activities of various enzymes during the first 20 min of pellicle formation. The effects of rinsing with sucrose and sugar alcohols on pellicle formation on the discs were also explored. The discs were placed in the mouth for 30 s, 1, 5, 10 and 20 min, preceded by rinsing with either distilled deionized water, sucrose, sorbitol, xylitol or phosphate-buffered saline. Western blot analyses of disc eluates with antiserum/antibody preparations to various salivary components revealed distinct patterns of deposition of bacterial and salivary components depending on the composition of the rinse. These studies confirm that salivary molecules and bacteria are deposited on apatitic surfaces in a selective manner and reveal that pellicle formation may be influenced by composition of diet. It is apparent that this in situ model could be used in screening potential antiplaque agents.
Collapse
Affiliation(s)
- A M Vacca Smith
- Center for Oral Biology, University of Rochester, 601 Elmwood Avenue, Box 611, Rochester, NY 14642, USA.
| | | |
Collapse
|