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Treerat P, de Mattos C, Burnside M, Zhang H, Zhu Y, Zou Z, Anderson D, Wu H, Merritt J, Kreth J. Ribosomal-processing cysteine protease homolog modulates Streptococcus mutans glucan production and interkingdom interactions. J Bacteriol 2024:e0010424. [PMID: 38899897 DOI: 10.1128/jb.00104-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 06/02/2024] [Indexed: 06/21/2024] Open
Abstract
Glucan-dependent biofilm formation is a crucial process in the establishment of Streptococcus mutans as a cariogenic oral microbe. The process of glucan formation has been investigated in great detail, with glycosyltransferases GtfB, GtfC, and GtfD shown to be indispensable for the synthesis of glucans from sucrose. Glucan production can be visualized during biofilm formation through fluorescent labeling, and its abundance, as well as the effect of glucans on general biofilm architecture, is a common phenotype to study S. mutans virulence regulation. Here, we describe an entirely new phenotype associated with glucan production, caused by a mutation in the open reading frame SMU_848, which is located in an operon encoding ribosome-associated proteins. This mutation led to the excess production and accumulation of glucan-containing droplets on the surface of biofilms formed on agar plates after prolonged incubation. While not characterized in S. mutans, SMU_848 shows homology to the phage-related ribosomal protease Prp, essential in cleaving off the N-terminal extension of ribosomal protein L27 for functional ribosome assembly in Staphylococcus aureus. We present a further characterization of SMU_848/Prp, demonstrating that the deletion of this gene leads to significant changes in S. mutans gtfBC expression. Surprisingly, it also profoundly impacts the interkingdom interaction between S. mutans and Candida albicans, a relevant dual-species interaction implicated in severe early childhood caries. The presented data support a potential broader role for SMU_848/Prp, possibly extending its functionality beyond the ribosomal network to influence important ecological processes. IMPORTANCE Streptococcus mutans is an important member of the oral biofilm and is implicated in the initiation of caries. One of the main virulence mechanisms is the glucan-dependent formation of biofilms. We identified a new player in the regulation of glucan production, SMU_848, which is part of an operon that also encodes for ribosomal proteins L27 and L21. A mutation in SMU_848, which encodes a phage-related ribosomal protease Prp, leads to a significant accumulation of glucan-containing droplets on S. mutans biofilms, a previously unknown phenotype. Further investigations expanded our knowledge about the role of SMU_848 beyond its role in glucan production, including significant involvement in interkingdom interactions, thus potentially playing a global role in the virulence regulation of S. mutans.
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Affiliation(s)
- Puthayalai Treerat
- Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, Oregon, USA
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Camilla de Mattos
- Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, Oregon, USA
| | - Molly Burnside
- Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, Oregon, USA
| | - Hua Zhang
- Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, Oregon, USA
| | - Yanting Zhu
- Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, Oregon, USA
| | - Zhengzhong Zou
- Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, Oregon, USA
| | - David Anderson
- Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, Oregon, USA
| | - Hui Wu
- Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, Oregon, USA
| | - Justin Merritt
- Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, Oregon, USA
- Department of Molecular Microbiology and Immunology, School of Medicine, Oregon Health & Science University (OHSU), Portland, Oregon, USA
| | - Jens Kreth
- Biomaterial and Biomedical Sciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, Oregon, USA
- Department of Molecular Microbiology and Immunology, School of Medicine, Oregon Health & Science University (OHSU), Portland, Oregon, USA
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2
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Carletto-Körber FPM, Acosta-Jofré MS, Vera NS, Mourelle-Martínez MR, Jiménez MG, Martínez JE, Cornejo LS, González-Ittig RE. Genetic variation in the glucosyltransferase-B gene of Streptococcus mutans and its relationship with caries experience in children from Córdoba, Argentina, and with strains from other countries. Int J Paediatr Dent 2023; 33:615-624. [PMID: 37212709 DOI: 10.1111/ipd.13091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 05/16/2023] [Accepted: 05/19/2023] [Indexed: 05/23/2023]
Abstract
BACKGROUND Caries is a worldwide distributed oral disease of multifactorial nature, with Streptococcus mutans being the most commonly isolated bacterial agent. The glycosyltransferases of this bacterium would play an essential role in the aetiology and pathogenesis of caries. AIM We explored how the glucosyltransferase-B (gtf-B) gene variability of S. mutans from children in central Argentina correlated with their caries experience and how these strains were genetically related to those of other countries. DESIGN Dental examinations were performed on 59 children; dmft and DMFT indexes were calculated. From stimulated saliva, S. mutans was grown and counted (CFU/mL). From bacterial DNA, the gtf-B gene was amplified and sequenced. Alleles were identified and their genealogical relationships established. Clinical, microbiological, and genetic variables were correlated with caries experience. Our sequences were included in a matrix with those from 16 countries (n = 358); genealogical relationships among alleles were obtained. Population genetic analyses were performed for countries with >20 sequences. RESULTS The mean dmft + DMFT was 6.45. Twenty-two gtf-B alleles were identified here, which showed low genetic differentiation in the network. Caries experience was correlated with CFU/mL, but not with allele variation. Low differentiation was found among the 70 alleles recovered from the 358 sequences and among the countries analyzed. CONCLUSION In this study, caries experience in children was correlated with the number of CFU/mL of S. mutans but not with the gtf-B gene variability. Combined genetic analyses of worldwide strains support the theory that this bacterium experienced population expansions, probably associated with agriculture development and/or food industrialization.
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Affiliation(s)
| | | | - Noelia Soledad Vera
- Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba, Argentina
| | | | - María Graciela Jiménez
- Hospital Universitario de Maternidad y Neonatología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Juan Enrique Martínez
- Hospital Universitario de Maternidad y Neonatología, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Lila Susana Cornejo
- Facultad de Odontología, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Raúl Enrique González-Ittig
- Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto de Diversidad y Ecología Animal (IDEA), CONICET-UNC, Córdoba, Argentina
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3
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Hoshino T, Fujiwara T. The findings of glucosyltransferase enzymes derived from oral streptococci. JAPANESE DENTAL SCIENCE REVIEW 2022; 58:328-335. [PMID: 36340584 PMCID: PMC9630777 DOI: 10.1016/j.jdsr.2022.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 10/18/2022] [Accepted: 10/21/2022] [Indexed: 11/07/2022] Open
Abstract
Glucosyltransferase enzymes (Gtfs) distribute among some streptococcal species in oral cavity and are known as key enzymes contributing to the development of oral biofilm such as dental plaque. In 18 streptococcal species, 45 glucosyltransferase genes (gtf) are detected from genome database. Gtfs catalyze the synthesis of the glucans, which are polymers of glucose, from sucrose and they are main component of oral biofilm. Especially, the Gtfs from Streptococcus mutans are recognized as one of dental caries pathogens since they contribute to the formation of dental plaque and the establishment of S. mutans in the tooth surface. Therefore, Gtfs has been studied particularly by many researchers in the dentistry field to develop the anti- caries vaccine. However, it is not still accomplished. In these days, the phylogenetic and crystal structure analyses of Gtfs were performed and the study of Gtfs will enter new situation from the technique in the past old viewpoint. The findings from those analyses will affect the development of the anti-caries vaccine very much after this. In this review, we summarize the findings of oral streptococcal Gtfs and consider the perspectives of the dental caries prevention which targeted Gtf.
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Wen ZT, Huang X, Ellepola K, Liao S, Li Y. Lactobacilli and human dental caries: more than mechanical retention. MICROBIOLOGY (READING, ENGLAND) 2022; 168. [PMID: 35671222 DOI: 10.1099/mic.0.001196] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Lactobacilli have been considered as major contributors to human dental caries for over a century. Recent in vitro model studies have shown that when compared to Streptococcus mutans, a keystone pathogen of human dental caries, the ability of lactobacilli to form biofilms is poor, although differences exist between the different major species. Further studies using molecular and bioinformatics approaches provide evidence that multiple mechanisms, including adhesin-receptor mediated physical contact with S. mutans, facilitate the adherence and establishment of lactobacilli on the tooth surface. There is also evidence that under conditions like continuous sugar consumption, weak acids and other antimicrobials such as bacteriocins from lactobacilli can become detrimental to the microbial community, especially those in the proximity. Details on the underlying mechanisms of how different Lactobacillus sp. establish and persist in the highly complex microbiota on the tooth surface await further investigation.
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Affiliation(s)
- Zezhang T Wen
- Department of Prosthodontics, School of Dentistry and Department of Microbiology, Immunology and Parasitology, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - Xiaochang Huang
- Department of Prosthodontics, School of Dentistry and Department of Microbiology, Immunology and Parasitology, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, LA, USA.,Present address: Analysis and Testing Center, Nanchang University, 235 Nanjing East Load, Qingshan Lake District, Nanchang, PR China
| | - Kassapa Ellepola
- Department of Prosthodontics, School of Dentistry and Department of Microbiology, Immunology and Parasitology, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, LA, USA.,Present address: Department of Oral Biology, College of Dentistry, University of Illinois Chicago, Chicago, IL, USA
| | - Sumei Liao
- Department of Prosthodontics, School of Dentistry and Department of Microbiology, Immunology and Parasitology, School of Medicine, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - Yihong Li
- Department of Public and Ecosystem Health, College of Veterinary Medicine, Cornel University, Ithaca, NY, USA
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5
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Atta L, Khalil R, Khan KM, Zehra M, Saleem F, Nur-e-Alam M, Ul-Haq Z. Virtual Screening, Synthesis and Biological Evaluation of Streptococcus mutans Mediated Biofilm Inhibitors. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27041455. [PMID: 35209243 PMCID: PMC8876203 DOI: 10.3390/molecules27041455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/16/2022] [Accepted: 02/18/2022] [Indexed: 11/16/2022]
Abstract
Dental caries, a global oral health concern, is a biofilm-mediated disease. Streptococcus mutans, the most prevalent oral microbiota, produces extracellular enzymes, including glycosyltransferases responsible for sucrose polymerization. In bacterial communities, the biofilm matrix confers resistance to host immune responses and antibiotics. Thus, in cases of chronic dental caries, inhibiting bacterial biofilm assembly should prevent demineralization of tooth enamel, thereby preventing tooth decay. A high throughput screening was performed in the present study to identify small molecule inhibitors of S. mutans glycosyltransferases. Multiple pharmacophore models were developed, validated with multiple datasets, and used for virtual screening against large chemical databases. Over 3000 drug-like hits were obtained that were analyzed to explore their binding mode. Finally, six compounds that showed good binding affinities were further analyzed for ADME (absorption, distribution, metabolism, and excretion) properties. The obtained in silico hits were evaluated for in vitro biofilm formation. The compounds displayed excellent antibiofilm activities with minimum inhibitory concentration (MIC) values of 15.26–250 µg/mL.
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Affiliation(s)
- Lubna Atta
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (L.A.); (K.M.K.); (F.S.)
| | - Ruqaiya Khalil
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (R.K.); (M.Z.)
| | - Khalid Mohammed Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (L.A.); (K.M.K.); (F.S.)
- Department of Clinical Pharmacy, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 31441, Dammam 31441, Saudi Arabia
| | - Moatter Zehra
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (R.K.); (M.Z.)
| | - Faiza Saleem
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (L.A.); (K.M.K.); (F.S.)
| | - Mohammad Nur-e-Alam
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia;
| | - Zaheer Ul-Haq
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (L.A.); (K.M.K.); (F.S.)
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (R.K.); (M.Z.)
- Correspondence: ; Tel.: +92-21-99261672
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6
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Boddapati S, Gummadi SN. A comprehensive review on mutan (a mixed linkage of α-1-3 and α-1-6 glucans) from bacterial sources. Biotechnol Genet Eng Rev 2021; 37:208-237. [PMID: 34816783 DOI: 10.1080/02648725.2021.2003072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Mutan is an extracellular sticky polymer having α-1-3 and α-1-6 glycosidic linkages with a large diversity in molecular weights and structures depending on the source. These compounds are reported to be highly thermostable and also have potential physiochemical and biological applications. The main aim of this review is to provide an overview of glucosyltransferases and their role in mutan synthesis. The production strategies and structural properties of bacterial mutans are discussed with a goal to improve production efficiency. The physicochemical features, chemical modifications, potential industrial applications and future prospects are also discussed. According to data, mutan and its derivatives will play a larger role in medicinal sectors and as thermoplastics in the near future.Abbreviations: ABTS: 2,2'-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid; BHI: Brain heart infusion broth; 13C (HSQC) NMR: Heteronuclear Single Quantum Coherence NMR; CBMs: Carbohydrate binding modules; DPPH: 2,2-diphenyl-1-picrylhydrazyl; FTIR: Fourier-transform infrared spectroscopy; GC-MS: Gas chromatography-mass spectrometry; GPC: Gel permeation chromatography; Gtfs: Glucosyltransferases; 1H (DQF-COSY): Double-quantum filtered correlation spectroscopy; HPAEC-PAD: High-performance anion exchange chromatography with pulsed amperometric detection; HPLC: High performance liquid chromatography; HPSEC-RI: High-performance size exclusive chromatography coupled with refractive index; HPSEC-MALLS: High-performance size exclusive chromatography with multi-angle laser light scattering detection; MALDI-TOF: Matrix-Assisted Laser Desorption/Ionization-Time of Flight mass spectrometry; Mw: Weight-average molecular weight; MWD: Molecular weight distribution; NMR: Nuclear magnetic resonance spectroscopy; TEM: Transmission electron microscopy; THB: Todd Hewitt Broth; TTY: Tryticase tryptose yeast extract broth.
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Affiliation(s)
- Sirisha Boddapati
- Applied and Industrial Microbiology Laboratory, Department of Biotechnology, Bjm School of Biosciences, Indian Institute of Technology-Madras, Chennai, India
| | - Sathyanaryana N Gummadi
- Applied and Industrial Microbiology Laboratory, Department of Biotechnology, Bjm School of Biosciences, Indian Institute of Technology-Madras, Chennai, India
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7
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Wang Z, Zhou Y, Han Q, Ye X, Chen Y, Sun Y, Liu Y, Zou J, Qi G, Zhou X, Cheng L, Ren B. Synonymous point mutation of gtfB gene caused by therapeutic X-rays exposure reduced the biofilm formation and cariogenic abilities of Streptococcus mutans. Cell Biosci 2021; 11:91. [PMID: 34001238 PMCID: PMC8130306 DOI: 10.1186/s13578-021-00608-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 05/07/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND The shift of oral microbiota is a critical factor of radiation caries in head and neck cancer patients after the radiotherapy. However, the direct effects of irradiation on the genome and virulence of cariogenic bacteria are poorly described. Here we investigated the genomic mutations and virulence change of Streptococcus mutans (S. mutans), the major cariogenic bacteria, exposed to the therapeutic doses of X-rays. RESULTS X-ray reduced the survival fraction of S. mutans and impacted its biofilm formation. We isolated a biofilm formation-deficient mutant #858 whose genome only possessed three synonymous mutations (c.2043 T > C, c.2100C > T, c.2109A > G) in gtfB gene. The "silent mutation" of c.2043 T > C in gtfB gene can cause the down-regulation of all of the gtfs genes' expression and decrease the GtfB enzyme secretion without the effect on the growth due to the codon bias. #858 and synonymous point mutation strain gtfB 2043 T>C, similar to the gtfB gene null mutant Δ gtfB, can significantly decrease the extracellular polysaccharide production, biofilm formation and cariogenic capabilities both in vitro and in vivo compared with wild type. CONCLUSION The direct exposure of X-ray radiation can affect the genome and virulence of oral bacteria even at therapeutic doses. The synonymous mutations of genome are negligent factors for gene expression and related protein translation due to the codon usage frequency.
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Affiliation(s)
- Zheng Wang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, 610041, China.,Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Yujie Zhou
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, 610041, China.,Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Qi Han
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, 610041, China
| | - Xingchen Ye
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, 610041, China
| | - Yanyan Chen
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, 610041, China.,Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Yan Sun
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, 610041, China.,Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Yaqi Liu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, 610041, China.,Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Jing Zou
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, 610041, China.,Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Guohai Qi
- Radiotherapy Center, Sichuan Cancer Hospital, Chengdu, 610041, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, 610041, China. .,Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
| | - Lei Cheng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, 610041, China. .,Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
| | - Biao Ren
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, 610041, China.
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8
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Yoo Y, Seo DH, Lee H, Cho ES, Song NE, Nam TG, Nam YD, Seo MJ. Inhibitory effect of Bacillus velezensis on biofilm formation by Streptococcus mutans. J Biotechnol 2019; 298:57-63. [DOI: 10.1016/j.jbiotec.2019.04.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 04/09/2019] [Accepted: 04/09/2019] [Indexed: 11/17/2022]
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Abstract
The microbiome and the human body constitute an integrated superorganism, which is the result of millions of years of coevolution with mutual adaptation and functional integration, and confers significant benefits for both parties. This evolutionary process has resulted in a highly diverse oral microbiome, which covers the full spectrum of acidogenic, aciduric, inflammatory, and anti-inflammatory properties. The relative proportions of members of the microbiome are affected by factors associated with modern life, such as general diet patterns, sugar consumption, tobacco smoking, oral hygiene, use of antibiotics and other antimicrobials, and vaccines. A perturbed balance in the oral microbiome may result in caries, periodontal disease, or candidiasis, and oral bacteria passively transferred to normally sterile parts of the body may cause extra-oral infections. Nevertheless, it should never be our goal to eliminate the oral microbiome, but rather we have to develop ways to re-establish a harmonious coexistence that is lost because of the modern lifestyle. With regard to oral diseases, this goal can normally be achieved by optimal oral hygiene, exposure to fluoride, reduction of sucrose consumption, stimulation of our innate immune defense, smoking cessation, and control of diabetes.
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Affiliation(s)
- Mogens Kilian
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Odontology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
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10
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Bedoya-Correa CM, Rincón Rodríguez RJ, Parada-Sanchez MT. Genomic and phenotypic diversity of Streptococcus mutans. J Oral Biosci 2019; 61:22-31. [DOI: 10.1016/j.job.2018.11.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/29/2018] [Accepted: 11/05/2018] [Indexed: 02/03/2023]
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11
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Xu RR, Yang WD, Niu KX, Wang B, Wang WM. An Update on the Evolution of Glucosyltransferase ( Gtf) Genes in Streptococcus. Front Microbiol 2018; 9:2979. [PMID: 30568640 PMCID: PMC6290343 DOI: 10.3389/fmicb.2018.02979] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 11/19/2018] [Indexed: 11/13/2022] Open
Abstract
In many caries-promoting Streptococcus species, glucosyltransferases (Gtfs) are recognized as key enzymes contributing to the modification of biofilm structures, disruption of homeostasis of healthy microbiota community and induction of caries development. It is therefore of great interest to investigate how Gtf genes have evolved in Streptococcus. In this study, we conducted a comprehensive survey of Gtf genes among 872 streptococci genomes of 37 species and identified Gtf genes from 364 genomes of 18 species. To clarify the relationships of these Gtf genes, 45 representative sequences were used for phylogenic analysis, which revealed two clear clades. Clade I included 12 Gtf genes from nine caries-promoting species of the Mutans and Downei groups, which produce enzymes known to synthesize sticky, water-insoluble glucans (WIG) that are critical for modifying biofilm structures. Clade II primarily contained Gtf genes responsible for synthesizing water-soluble glucans (WSG) from all 18 species, and this clade further diverged into three subclades (IIA, IIB, and IIC). An analysis of 16 pairs of duplicated Gtf genes revealed high divergence levels at the C-terminal repeat regions, with ratios of the non-synonymous substitution rate (dN) to synonymous substitution rate (dS) ranging from 0.60 to 1.03, indicating an overall relaxed constraint in this region. However, among the clade I Gtf genes, some individual repeat units possessed strong functional constraints by the same criterion. Structural variations in the repeat regions were also observed, with detection of deletions or recent duplications of individual repeat units. Overall, by establishing an updated phylogeny and further elucidating their evolutionary patterns, this work enabled us to gain a greater understanding of the origination and divergence of Gtf genes in Streptococcus.
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Affiliation(s)
- Rong-Rong Xu
- Nanjing Stomatological Hospital, Nanjing University Medical School, Nanjing, China
| | - Wei-Dong Yang
- Nanjing Stomatological Hospital, Nanjing University Medical School, Nanjing, China
| | - Ke-Xin Niu
- Laboratory of Plant Genetics and Molecular Evolution, School of Life Sciences, Nanjing University, Nanjing, China
| | - Bin Wang
- Laboratory of Plant Genetics and Molecular Evolution, School of Life Sciences, Nanjing University, Nanjing, China
| | - Wen-Mei Wang
- Nanjing Stomatological Hospital, Nanjing University Medical School, Nanjing, China
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12
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Yu J, Yan F, Lu Q, Liu R. Interaction between sorghum procyanidin tetramers and the catalytic region of glucosyltransferases-I from Streptococcus mutans UA159. Food Res Int 2018; 112:152-159. [DOI: 10.1016/j.foodres.2018.06.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 05/27/2018] [Accepted: 06/12/2018] [Indexed: 10/28/2022]
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13
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Analysis of sucrose-induced small RNAs in Streptococcus mutans in the presence of different sucrose concentrations. Appl Microbiol Biotechnol 2017; 101:5739-5748. [PMID: 28567481 DOI: 10.1007/s00253-017-8346-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 05/06/2017] [Accepted: 05/10/2017] [Indexed: 01/09/2023]
Abstract
Streptococcus mutans (S. mutans) is the major pathogen contributing to dental caries. Sucrose is an important carbohydrate source for S. mutans and is crucial for dental caries. Small RNAs (sRNAs) are key post-transcriptional regulators of stress adaptation and virulence in bacteria. Here, for the first time, we created three replicate RNA libraries exposed to either 1 or 5% sucrose. The expression levels of sRNAs and target genes (gtfB, gtfC, and spaP) related to virulence were assessed. In addition, some phenotypic traits were evaluated. We obtained 2125 sRNA candidates with at least 100 average reads in 1% sucrose or 5% sucrose. Of these candidates, 2 were upregulated and 20 were downregulated in 1% sucrose. Six of these 22 differentially expressed sRNAs were validated by qRT-PCR. The expression level of target gene gtfB was higher in 1% sucrose. The adherence ratio of S. mutans was higher in 1% sucrose than in 5% sucrose. The synthesis of water-insoluble glucans (WIGs) was significantly higher in 5% sucrose than in 1% sucrose. These data suggest that a series of sRNAs can be induced in response to sucrose, and that some sRNAs might be involved in the regulation of phenotypes, providing new insight into the prevention of caries.
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Okamoto M, Naito M, Miyanohara M, Imai S, Nomura Y, Saito W, Momoi Y, Takada K, Miyabe-Nishiwaki T, Tomonaga M, Hanada N. Complete genome sequence of Streptococcus troglodytae TKU31 isolated from the oral cavity of a chimpanzee (Pan troglodytes). Microbiol Immunol 2017; 60:811-816. [PMID: 27921343 DOI: 10.1111/1348-0421.12453] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/21/2016] [Accepted: 11/24/2016] [Indexed: 11/27/2022]
Abstract
Streptococcus troglodytae TKU31 was isolated from the oral cavity of a chimpanzee (Pan troglodytes) and was found to be the most closely related species of the mutans group streptococci to Streptococcus mutans. The complete sequence of TKU31 genome consists of a single circular chromosome that is 2,097,874 base pairs long and has a G + C content of 37.18%. It possesses 2082 coding sequences (CDSs), 65 tRNAs and five rRNA operons (15 rRNAs). Two clustered regularly interspaced short palindromic repeats, six insertion sequences and two predicted prophage elements were identified. The genome of TKU31 harbors some putative virulence associated genes, including gtfB, gtfC and gtfD genes encoding glucosyltransferase and gbpA, gbpB, gbpC and gbpD genes encoding glucan-binding cell wall-anchored protein. The deduced amino acid identity of the rhamnose-glucose polysaccharide F gene (rgpF), which is one of the serotype determinants, is 91% identical with that of S. mutans LJ23 (serotype k) strain. However, two other virulence-associated genes cnm and cbm, which encode the collagen-binding proteins, were not found in the TKU31 genome. The complete genome sequence of S. troglodytae TKU31 has been deposited at DDBJ/European Nucleotide Archive/GenBank under the accession no. AP014612.
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Affiliation(s)
- Masaaki Okamoto
- Department of Translational Research, Tsurumi University School of Dental Medicine
| | - Mariko Naito
- Division of Microbiology and Oral Infection, Department of Molecular Microbiology and Immunology, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8588
| | - Mayu Miyanohara
- Department of Translational Research, Tsurumi University School of Dental Medicine
| | - Susumu Imai
- Department of Translational Research, Tsurumi University School of Dental Medicine
| | - Yoshiaki Nomura
- Department of Translational Research, Tsurumi University School of Dental Medicine
| | - Wataru Saito
- Department of Operative Dentistry, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama 230-8501
| | - Yasuko Momoi
- Department of Operative Dentistry, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama 230-8501
| | - Kazuko Takada
- Department of Oral Microbiology, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakaecho-Nishi, Matsudo, Chiba, 271-8587
| | | | - Masaki Tomonaga
- Language and Intelligence Section, Primate Research Institute, Kyoto University, Inuyama, Aichi 484-8506, Japan
| | - Nobuhiro Hanada
- Department of Translational Research, Tsurumi University School of Dental Medicine
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Gsy, a novel glucansucrase from Leuconostoc mesenteroides, mediates the formation of cell aggregates in response to oxidative stress. Sci Rep 2016; 6:38122. [PMID: 27924943 PMCID: PMC5141493 DOI: 10.1038/srep38122] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 11/07/2016] [Indexed: 12/14/2022] Open
Abstract
Leuconostoc mesenteroides is a member of lactic acid bacteria (LAB) with wide applications in the food and medical industries. Species in the genus Leuconostoc are catalase-negative and generally regarded as facultative anaerobic or aerotolerant organisms. Despite their extensive use in industry, certain issues concerning the aerobic life of L. mesenteroides, e.g., the mechanism involved in the tolerance to oxygen, remain to be addressed. In this manuscript, a survival strategy employed by L. mesenteroides BD3749 in response to oxidative stress was elucidated. BD3749 cells cultivated in medium with sucrose available synthesized large amounts of exopolysaccharides, mostly consisting of insoluble EPS. When BD3749 cells were challenged with oxidative stress, the amount of insoluble EPS was greatly enhanced. The synthesized EPSs reduced the accumulation of reactive oxygen species (ROS) in bacterial cells and improved their survival during chronic oxidative stress. Another study showed that Gsy, a novel glucansucrase in the GH70 family that is induced by sucrose and up-regulated following exposure to oxygen, was responsible for the synthesis of insoluble EPS. Gsy was subsequently demonstrated to play pivotal roles in the formation of aggregates to alleviate the detrimental effects on BD3749 cells exerted by oxygen.
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de Sousa MB, Júnior JOCS, Barbosa WLR, da Silva Valério E, da Mata Lima A, de Araújo MH, Muzitano MF, Nakamura CV, de Mello JCP, Teixeira FM. Pyrostegia venusta (Ker Gawl.) Miers Crude Extract and Fractions: Prevention of Dental Biofilm Formation and Immunomodulatory Capacity. Pharmacogn Mag 2016; 12:S218-22. [PMID: 27279710 PMCID: PMC4883082 DOI: 10.4103/0973-1296.182150] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 07/01/2015] [Indexed: 11/04/2022] Open
Abstract
Background: Caries and periodontal diseases remain as important diseases in the Brazilian population. One important pathogen associated with this situation is Streptococcus mutans and other important factor is this pathogen's ability to adhere firmly to the tooth surface leading to dental biofilm formation and caries development. Objectives: Determine the antibacterial and other biological activities of P. venusta related to its potential to be used in the treatment of caries and periodontal disease. Methods: The growth inhibition by P. venusta of Streptococcus mutans, S. mitis, S. oralis and Candida albicans was determined using the broth microdilution method. In addition, the effect of the samples in adherence and reducing production of acids by S. mutans, and germ-tube formation of C. albicans was analysed. The Nitric Oxide (NO) production and cytotoxicity of P. venusta to peripheral blood mononuclear cells (PBMC) and RAW 264.7 Cell Line Murine Macrophage from Blood were assessed. Results: The crude extract (CE) and ethyl-acetate (AF) and n-butanol (BF) fractions showed antibacterial activity. The ethyl-acetate (AF) fraction showed the highest inhibition percentage against the adherence of S. mutans and C. albicans cells without budding, beyond NO production inhibition. There was not any cytotoxicity in the murine macrophages RAW 264.7 cells. Conclusion: Our results suggest that P. venusta presents potential to be used as a preliminary source of compounds that can provide helpful activity when used in prophylaxis or treatment of caries or periodontal disease. SUMMARY Biological activities of Pyrostegia venusta and its potential for use in formulations for the prevention of oral diseases.
Abbreviations used: NO: Nitric oxide, PBMC: Peripheral blood mononuclear cells, CE: Crude extract, AF: Ethyl-acetate fraction, BF: n-butanol fraction, HF: Hexane fraction, WF: Water fraction, MIC: Minimum inhibitory concentration, MBC: Minimum bactericidal concentration, ATCC: American Type Culture Collection, CFU: Colony-forming units, BHI: Brain heart infusion, RPMI: Roswell Park Memorial Institute, MOPS: 3-(N-morpholino)propanesulfonic acid, DMEM: Dulbecco's modified Eagle's médium, LPS: Lipopolysacharide, MTT: 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide, OD: Optical density, AC: Acteoside,
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Affiliation(s)
- Mayara Brito de Sousa
- Department of Post-Graduation Program in Pharmaceutical Sciences, Institute of Health Sciences, Federal University of Pará, Augusto Corrêa Avenue, No. 01, University Campus of Guamá, Belém, Pará CEP 67150-110, Brazil
| | - José Otávio Carrera Silva Júnior
- Department of Post-Graduation Program in Pharmaceutical Sciences, Institute of Health Sciences, Federal University of Pará, Augusto Corrêa Avenue, No. 01, University Campus of Guamá, Belém, Pará CEP 67150-110, Brazil; Laboratory of Research and Development in Pharmaceutical and Cosmetic, College of Pharmacy, Institute of Health Sciences, Federal University of Pará, Augusto Corrêa Avenue, No. 01, University Campus of Guamá, Belém, Pará CEP 67150-110, Brazil
| | - Wagner Luiz Ramos Barbosa
- Department of Post-Graduation Program in Pharmaceutical Sciences, Institute of Health Sciences, Federal University of Pará, Augusto Corrêa Avenue, No. 01, University Campus of Guamá, Belém, Pará CEP 67150-110, Brazil
| | - Erika da Silva Valério
- Department of Post-Graduation Program in Pharmaceutical Sciences, Institute of Health Sciences, Federal University of Pará, Augusto Corrêa Avenue, No. 01, University Campus of Guamá, Belém, Pará CEP 67150-110, Brazil
| | - Andriele da Mata Lima
- College of Pharmacy, Institute of Health Sciences, Federal University of Pará, Augusto Corrêa Avenue, No. 01, University Campus of Guamá, Belém, Pará CEP 67150-110, Brazil
| | - Marlon Heggdorne de Araújo
- Laboratory of Bioactive Products, School of Pharmacy, Federal University of Rio de Janeiro, Campus Macaé, Polo Novo Cavaleiros - IMCT, Alcides da Conceição Street, 159 Novo Cavaleiros, CEP 27933-378, Brazil
| | - Michelle Frazão Muzitano
- Laboratory of Bioactive Products, School of Pharmacy, Federal University of Rio de Janeiro, Campus Macaé, Polo Novo Cavaleiros - IMCT, Alcides da Conceição Street, 159 Novo Cavaleiros, CEP 27933-378, Brazil
| | - Celso Vataru Nakamura
- Department of Post-Graduation Program in Pharmaceutical Sciences, Health Sciences Center, State University of Maringá, Av. Colombo, 5790, Maringá, Paraná CEP 87020-900, Brazil
| | - João Carlos Palazzo de Mello
- Department of Post-Graduation Program in Pharmaceutical Sciences, Health Sciences Center, State University of Maringá, Av. Colombo, 5790, Maringá, Paraná CEP 87020-900, Brazil
| | - Francisco Martins Teixeira
- Department of Post-Graduation Program in Pharmaceutical Sciences, Institute of Health Sciences, Federal University of Pará, Augusto Corrêa Avenue, No. 01, University Campus of Guamá, Belém, Pará CEP 67150-110, Brazil; Pharmacy Course, Federal University of Rio de Janeiro, Campus Macaé, Av. Aluízio da Silva Gomes, 50 Granja dos Cavaleiros, CEP 27930-560, Macaé, Rio de Janeiro, CEP 87020-900, Brazil
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Ge X, Shi X, Shi L, Liu J, Stone V, Kong F, Kitten T, Xu P. Involvement of NADH Oxidase in Biofilm Formation in Streptococcus sanguinis. PLoS One 2016; 11:e0151142. [PMID: 26950587 PMCID: PMC4780693 DOI: 10.1371/journal.pone.0151142] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 02/24/2016] [Indexed: 01/20/2023] Open
Abstract
Biofilms play important roles in microbial communities and are related to infectious diseases. Here, we report direct evidence that a bacterial nox gene encoding NADH oxidase is involved in biofilm formation. A dramatic reduction in biofilm formation was observed in a Streptococcus sanguinis nox mutant under anaerobic conditions without any decrease in growth. The membrane fluidity of the mutant bacterial cells was found to be decreased and the fatty acid composition altered, with increased palmitic acid and decreased stearic acid and vaccenic acid. Extracellular DNA of the mutant was reduced in abundance and bacterial competence was suppressed. Gene expression analysis in the mutant identified two genes with altered expression, gtfP and Idh, which were found to be related to biofilm formation through examination of their deletion mutants. NADH oxidase-related metabolic pathways were analyzed, further clarifying the function of this enzyme in biofilm formation.
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Affiliation(s)
- Xiuchun Ge
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, VA 23298, United States of America
| | - Xiaoli Shi
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Science, Nanjing 21008, China
| | - Limei Shi
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Science, Nanjing 21008, China
| | - Jinlin Liu
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, VA 23298, United States of America
| | - Victoria Stone
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, VA 23298, United States of America
| | - Fanxiang Kong
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Science, Nanjing 21008, China
| | - Todd Kitten
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, VA 23298, United States of America
- Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, VA 23298, United States of America
| | - Ping Xu
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, VA 23298, United States of America
- Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, VA 23298, United States of America
- * E-mail:
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Sucrose- and Fructose-Specific Effects on the Transcriptome of Streptococcus mutans, as Determined by RNA Sequencing. Appl Environ Microbiol 2015; 82:146-56. [PMID: 26475108 DOI: 10.1128/aem.02681-15] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 10/13/2015] [Indexed: 11/20/2022] Open
Abstract
Recent genome-scale studies have begun to establish the scope and magnitude of the impacts of carbohydrate source and availability on the regulation of gene expression in bacteria. The effects of sugars on gene expression are particularly profound in a group of lactic acid bacteria that rely almost entirely on their saccharolytic activities for energy production and growth. For Streptococcus mutans, the major etiologic agent of human dental caries, sucrose is the carbohydrate that contributes in the most significant manner to establishment, persistence, and virulence of the organism. However, because this organism produces multiple extracellular sucrolytic enzymes that can release hexoses from sucrose, it has not been possible to study the specific effects of sucrose transport and metabolism on gene expression in the absence of carbohydrates that by themselves can elicit catabolite repression and induce expression of multiple genes. By employing RNA deep-sequencing (RNA-Seq) technology and mutants that lacked particular sucrose-metabolizing enzymes, we compared the transcriptomes of S. mutans bacteria growing on glucose, fructose, or sucrose as the sole carbohydrate source. The results provide a variety of new insights into the impact of sucrose transport and metabolism by S. mutans, including the likely expulsion of fructose after sucrose internalization and hydrolysis, and identify a set of genes that are differentially regulated by sucrose versus fructose. The findings significantly enhance our understanding of the genetics and physiology of this cariogenic pathogen.
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Okamoto M, Imai S, Miyanohara M, Saito W, Momoi Y, Nomura Y, Ikawa T, Ogawa T, Miyabe-Nishiwaki T, Kaneko A, Watanabe A, Watanabe S, Hayashi M, Tomonaga M, Hanada N. Streptococcus panodentissp. nov. from the oral cavities of chimpanzees. Microbiol Immunol 2015; 59:526-32. [DOI: 10.1111/1348-0421.12290] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 07/15/2015] [Accepted: 07/29/2015] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | - Tomoko Ikawa
- Department of Fixed Prosthodontics; Tsurumi University School of Dental Medicine, 2-1-3, Tsurumi; Tsurumi-ku Yokohama 230-8501
| | - Takumi Ogawa
- Department of Fixed Prosthodontics; Tsurumi University School of Dental Medicine, 2-1-3, Tsurumi; Tsurumi-ku Yokohama 230-8501
| | | | | | | | | | - Misato Hayashi
- Language and Intelligence Section; Primate Research Institute, Kyoto University; Inuyama Aichi 484-8506, Japan
| | - Masaki Tomonaga
- Language and Intelligence Section; Primate Research Institute, Kyoto University; Inuyama Aichi 484-8506, Japan
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20
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Passerini D, Vuillemin M, Ufarté L, Morel S, Loux V, Fontagné-Faucher C, Monsan P, Remaud-Siméon M, Moulis C. Inventory of the GH70 enzymes encoded byLeuconostoc citreumNRRL B-1299 - identification of three novel α-transglucosylases. FEBS J 2015; 282:2115-30. [DOI: 10.1111/febs.13261] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 03/04/2015] [Accepted: 03/06/2015] [Indexed: 11/30/2022]
Affiliation(s)
- Delphine Passerini
- Université de Toulouse; Institut National des Sciences Appliquées (INSA); Université Paul Sabatier (UPS); Institut National Polytechnique (INP); Laboratoire d'Ingénierie des Systémes biologiques et des Procédés (LISBP); Toulouse France
- Centre National de la Recherche Scientifique; UMR5504; Toulouse France
- Institut National de la Recherche Agronomique; UMR792 Ingénierie des Systèmes Biologiques et des Procédés; Toulouse France
| | - Marlène Vuillemin
- Université de Toulouse; Institut National des Sciences Appliquées (INSA); Université Paul Sabatier (UPS); Institut National Polytechnique (INP); Laboratoire d'Ingénierie des Systémes biologiques et des Procédés (LISBP); Toulouse France
- Centre National de la Recherche Scientifique; UMR5504; Toulouse France
- Institut National de la Recherche Agronomique; UMR792 Ingénierie des Systèmes Biologiques et des Procédés; Toulouse France
| | - Lisa Ufarté
- Université de Toulouse; Institut National des Sciences Appliquées (INSA); Université Paul Sabatier (UPS); Institut National Polytechnique (INP); Laboratoire d'Ingénierie des Systémes biologiques et des Procédés (LISBP); Toulouse France
- Centre National de la Recherche Scientifique; UMR5504; Toulouse France
- Institut National de la Recherche Agronomique; UMR792 Ingénierie des Systèmes Biologiques et des Procédés; Toulouse France
| | - Sandrine Morel
- Université de Toulouse; Institut National des Sciences Appliquées (INSA); Université Paul Sabatier (UPS); Institut National Polytechnique (INP); Laboratoire d'Ingénierie des Systémes biologiques et des Procédés (LISBP); Toulouse France
- Centre National de la Recherche Scientifique; UMR5504; Toulouse France
- Institut National de la Recherche Agronomique; UMR792 Ingénierie des Systèmes Biologiques et des Procédés; Toulouse France
| | - Valentin Loux
- Institut National de la Recherche Agronomique; UMR1077 Mathématique; Informatique et Génome; Jouy-en-Josas France
| | - Catherine Fontagné-Faucher
- Laboratoire de Biologie Appliquée à l'Agroalimentaire et à l'Environnement; Institut Universitaire de Technologie - Université Paul Sabatier; Auch France
| | - Pierre Monsan
- Université de Toulouse; Institut National des Sciences Appliquées (INSA); Université Paul Sabatier (UPS); Institut National Polytechnique (INP); Laboratoire d'Ingénierie des Systémes biologiques et des Procédés (LISBP); Toulouse France
- Centre National de la Recherche Scientifique; UMR5504; Toulouse France
- Institut National de la Recherche Agronomique; UMR792 Ingénierie des Systèmes Biologiques et des Procédés; Toulouse France
| | - Magali Remaud-Siméon
- Université de Toulouse; Institut National des Sciences Appliquées (INSA); Université Paul Sabatier (UPS); Institut National Polytechnique (INP); Laboratoire d'Ingénierie des Systémes biologiques et des Procédés (LISBP); Toulouse France
- Centre National de la Recherche Scientifique; UMR5504; Toulouse France
- Institut National de la Recherche Agronomique; UMR792 Ingénierie des Systèmes Biologiques et des Procédés; Toulouse France
| | - Claire Moulis
- Université de Toulouse; Institut National des Sciences Appliquées (INSA); Université Paul Sabatier (UPS); Institut National Polytechnique (INP); Laboratoire d'Ingénierie des Systémes biologiques et des Procédés (LISBP); Toulouse France
- Centre National de la Recherche Scientifique; UMR5504; Toulouse France
- Institut National de la Recherche Agronomique; UMR792 Ingénierie des Systèmes Biologiques et des Procédés; Toulouse France
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Caufield PW, Schön CN, Saraithong P, Li Y, Argimón S. Oral Lactobacilli and Dental Caries: A Model for Niche Adaptation in Humans. J Dent Res 2015; 94:110S-8S. [PMID: 25758458 DOI: 10.1177/0022034515576052] [Citation(s) in RCA: 152] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Lactobacilli have been associated with dental caries for over a century. Here, we review the pertinent literature along with findings from our own study to formulate a working hypothesis about the natural history and role of lactobacilli. Unlike most indigenous microbes that stably colonize a host, lactobacilli appear to be planktonic, opportunistic settlers that can gather and multiply only in certain restrictive niches of the host, at least within the oral cavity. We postulate that the following essential requirements are necessary for sustained colonization of lactobacilli in humans: 1) a stagnant, retentive niche that is mostly anaerobic; 2) a low pH milieu; and 3) ready access to carbohydrates. Three sites on the human body meet these specifications: caries lesions, the stomach, and the vagina. Only a handful of Lactobacillus species is found in caries lesions, but they are largely absent in caries-free children. Lactobacilli present in caries lesions represent both a major contributor to caries progression and a major reservoir to the gastrointestinal (GI) tract. We extend the assertion from other investigators that lactobacilli found in the GI tract originate in the oral cavity by proposing that lactobacilli in the oral cavity arise from caries lesions. This, in turn, leads us to reflect on the health implications of the lactobacilli in the mouth and downstream GI and to ponder whether these or any of the Lactobacillus species are truly indigenous to the human GI tract or the oral cavity.
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Affiliation(s)
- P W Caufield
- New York University College of Dentistry, New York, USA
| | - C N Schön
- New York University College of Dentistry, New York, USA
| | - P Saraithong
- New York University College of Dentistry, New York, USA
| | - Y Li
- New York University College of Dentistry, New York, USA
| | - S Argimón
- New York University College of Dentistry, New York, USA
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Henne K, Li J, Stoneking M, Kessler O, Schilling H, Sonanini A, Conrads G, Horz HP. Global analysis of saliva as a source of bacterial genes for insights into human population structure and migration studies. BMC Evol Biol 2014; 14:190. [PMID: 25183372 PMCID: PMC4360258 DOI: 10.1186/s12862-014-0190-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 08/13/2014] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND The genetic diversity of the human microbiome holds great potential for shedding light on the history of our ancestors. Helicobacter pylori is the most prominent example as its analysis allowed a fine-scale resolution of past migration patterns including some that could not be distinguished using human genetic markers. However studies of H. pylori require stomach biopsies, which severely limits the number of samples that can be analysed. By focussing on the house-keeping gene gdh (coding for the glucose-6-phosphate dehydrogenase), on the virulence gene gtf (coding for the glucosyltransferase) of mitis-streptococci and on the 16S-23S rRNA internal transcribed spacer (ITS) region of the Fusobacterium nucleatum/periodonticum-group we here tested the hypothesis that bacterial genes from human saliva have the potential for distinguishing human populations. RESULTS Analysis of 10 individuals from each of seven geographic regions, encompassing Africa, Asia and Europe, revealed that the genes gdh and ITS exhibited the highest number of polymorphic sites (59% and 79%, respectively) and most OTUs (defined at 99% identity) were unique to a given country. In contrast, the gene gtf had the lowest number of polymorphic sites (21%), and most OTUs were shared among countries. Most of the variation in the gdh and ITS genes was explained by the high clonal diversity within individuals (around 80%) followed by inter-individual variation of around 20%, leaving the geographic region as providing virtually no source of sequence variation. Conversely, for gtf the variation within individuals accounted for 32%, between individuals for 57% and among geographic regions for 11%. This geographic signature persisted upon extension of the analysis to four additional locations from the American continent. Pearson correlation analysis, pairwise Fst-cluster analysis as well as UniFrac analyses consistently supported a tree structure in which the European countries clustered tightly together and branched with American countries and South Africa, to the exclusion of Asian countries and the Congo. CONCLUSION This study shows that saliva harbours protein-coding bacterial genes that are geographically structured, and which could potentially be used for addressing previously unresolved human migration events.
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Affiliation(s)
- Karsten Henne
- Division of Oral Microbiology and Immunology, Department for Operative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University Hospital, Pauwelsstrasse 30, D-52057, Aachen, Germany.
| | - Jing Li
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, D-04103, Leipzig, Germany.
- Current address: Max Planck Independent Research Group on Population Genomics, Chinese Academy of Sciences and Max Planck Society Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 200031, China.
| | - Mark Stoneking
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, D-04103, Leipzig, Germany.
| | - Olga Kessler
- Division of Oral Microbiology and Immunology, Department for Operative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University Hospital, Pauwelsstrasse 30, D-52057, Aachen, Germany.
| | - Hildegard Schilling
- Division of Oral Microbiology and Immunology, Department for Operative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University Hospital, Pauwelsstrasse 30, D-52057, Aachen, Germany.
| | - Anne Sonanini
- Division of Oral Microbiology and Immunology, Department for Operative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University Hospital, Pauwelsstrasse 30, D-52057, Aachen, Germany.
| | - Georg Conrads
- Division of Oral Microbiology and Immunology, Department for Operative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University Hospital, Pauwelsstrasse 30, D-52057, Aachen, Germany.
| | - Hans-Peter Horz
- Division of Virology, Institute of Medical Microbiology, RWTH Aachen University Hospital, Pauwelsstrasse 30, D-52057, Aachen, Germany.
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Durso SC, Vieira LM, Cruz JNS, Azevedo CS, Rodrigues PH, Simionato MRL. Sucrose substitutes affect the cariogenic potential of Streptococcus mutans biofilms. Caries Res 2014; 48:214-22. [PMID: 24481032 DOI: 10.1159/000354410] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 07/01/2013] [Indexed: 11/19/2022] Open
Abstract
Streptococcus mutans is considered the primary etiologic agent of dental caries and contributes significantly to the virulence of dental plaque, especially in the presence of sucrose. To avoid the role of sucrose on the virulence factors of S. mutans, sugar substitutes are commonly consumed because they lead to lower or no production of acids and interfere with biofilm formation. This study aimed to investigate the contribution of sugar substitutes in the cariogenic potential of S. mutans biofilms. Thus, in the presence of sucrose, glucose, sucralose and sorbitol, the biofilm mass was quantified up to 96 h, the pH of the spent culture media was measured, the expression of biofilm-related genes was determined, and demineralization challenge experiments were conduct in enamel fragments. The presence of sugars or sugar substitutes profoundly affected the expression of spaP, gtfB, gtfC, gbpB, ftf, vicR and vicX in either biofilm or planktonic cells. The substitution of sucrose induced a down-regulation of most genes involved in sucrose-dependent colonization in biofilm cells. When the ratio between the expression of biofilm and planktonic cells was considered, most of those genes were down-regulated in biofilm cells in the presence of sugars and up-regulated in the presence of sugar substitutes. However, sucralose but not sorbitol fulfilled the purpose of reducing the cariogenic potential of the diet since it induced the biofilm formation with the lowest biomass, did not change the pH of the medium and led to the lowest lesion depth in the cariogenic challenge.
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Affiliation(s)
- S C Durso
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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Lessons Learned from Clinical Studies: Roles of Mutans Streptococci in the Pathogenesis of Dental Caries. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s40496-013-0008-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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