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Streptococcus mutans

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https://www.readbyqxmd.com/read/28546811/antimicrobial-activity-of-a-cationic-guanidine-compound-against-two-pathogenic-oral-bacteria
#1
E Escamilla-García, A G Alcázar-Pizaña, J C Segoviano-Ramírez, C Del Angel-Mosqueda, A P López-Lozano, E Cárdenas-Estrada, M A De La Garza-Ramos, C E Medina-De La Garza, M Márquez
This study evaluated the potential antimicrobial properties of a polyguanidine (CatDex) on two oral bacteria. Chlorhexidine gluconate 1340 μmoL L(-1) (CHX 0.12%) was used as control. Streptococcus mutans (S. mutans) and Porphyromonas gingivalis (P. gingivalis) were grown in BHI media. Bacterial sensitivity and antimicrobial activity were determined by the minimum inhibitory concentration (MIC) and Kirby-Bauer methods. To study side effects, that is, toxicity, dental pulp stem cells (DPSCs) were used. Fluorometric cytotoxicity and confocal microscopy assays were used in order to test cell viability...
2017: International Journal of Microbiology
https://www.readbyqxmd.com/read/28546111/comparative-effect-of-photodynamic-therapy-on-separated-or-mixed-cultures-of-streptococcus-mutans-and-streptococcus-sanguinis
#2
Vanesa Pérez-Laguna, Luna Pérez-Artiaga, Verónica Lampaya-Pérez, Santiago Camacho López, Isabel García-Luque, María José Revillo, Santi Nonell, Yolanda Gilaberte, Antonio Rezusta
Antimicrobial photodynamic therapy (aPDT) has shown to exert a bactericidal effect against Streptococcus sanguinis and Streptococcus mutans. However, this efficacy has been reported for either type of bacteria separately. Bacterial suspensions of both strains, separately or together, were treated with concentrations of methylene blue (MB) and rose bengal (RB). Suspensions were irradiated with a light-emitting diode lamp (λ center at 625nm for MB and λ center at 515nm for RB) using a fluence of 18J/cm(2). RB-aPDT at concentrations of 0...
May 22, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28542863/mechanisms-of-silver-diamine-fluoride-on-arresting-caries-a-literature-review
#3
REVIEW
Irene Shuping Zhao, Sherry Shiqian Gao, Noriko Hiraishi, Michael Francis Burrow, Duangporn Duangthip, May Lei Mei, Edward Chin-Man Lo, Chun-Hung Chu
OBJECTIVE: To review the evidence regarding the mechanisms of silver diamine fluoride (SDF) for arresting caries. METHODS: A literature search was conducted using the keywords silver diamine fluoride, and its alternative names, in seven databases: PubMed, Embase and Scopus (English); China National Knowledge Infrastructure (Chinese); Bilioteca Virtual em Saude (Portuguese); Biblioteca Virtual en Salud Espana (Spanish); and Ichushi-Web (Japanese). The titles and abstracts were screened...
May 21, 2017: International Dental Journal
https://www.readbyqxmd.com/read/28540581/streptococcus-mutans-adherence-and-biofilm-formation-on-experimental-composites-containing-dicalcium-phosphate-dihydrate-nanoparticles
#4
Andrei C Ionescu, Sebastian Hahnel, Gloria Cazzaniga, Marco Ottobelli, Roberto Ruggiero Braga, Marcela Charantola Rodrigues, Eugenio Brambilla
This study aimed at evaluating bacterial adhesion and biofilm formation on resin-based composites (RBC) including dicalcium phosphate dihydrate nanoparticles (nDCPD). METHODS: Specimens were prepared from experimental RBCs with BisGMA/TEGDMA resin matrix including 20 vol% of either nDCPD (nDCPD-RBC), TEGDMA-functionalized nDPCD (F-nDCPD-RBC) or silanized silica (SiO2-RBC). Neat resin blend (control-Resin), conventional nanohybrid RBC (control-RBC) and human enamel were used for reference...
July 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28533236/antibacterial-and-antibiofilm-activities-of-a-novel-synthetic-cyclic-lipopeptide-against-cariogenic-streptococcus-mutans-ua159
#5
Kyung R Min, Adriana Galvis, Brandon Williams, Ramanjaneyulu Rayala, Predrag Cudic, Dragana Ajdic
Despite continuous efforts to control cariogenic dental biofilms, very few effective antimicrobial treatments exist. In this study, we characterized the activity of a novel synthetic cyclic lipopeptide 4 (CLP-4), derived from fusaricidin, against the cariogenic pathogen Streptococcus mutans UA159. We determined CLP-4's minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), spontaneous resistance frequency, and we performed time-kill assays. Additionally, we assessed CLP-4's potential to inhibit biofilm formation (MBIC) and eradicate pre-formed biofilms (MBEC)...
May 22, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28530170/k-modulates-genetic-competence-and-the-stress-regulon-of-streptococcus-mutans
#6
Gursonika Binepal, Iwona B Wenderska, Paula Crowley, Richard N Besingi, Dilani B Senadheera, L Jeannine Brady, Dennis G Cvitkovitch
Potassium (K+) is the most abundant cation in dental plaque fluid. Previously, we reported the link between K+ transport via Trk2 in Streptococcus mutans and its two critical virulence attributes: acid tolerance and surface adhesion. Herein, we build further on the intimate link between K+ levels and S. mutans biology. High (>25 mM) versus low (≤5 mM) K+ concentrations in the growth medium affected conformational epitopes of cell surface-localized adhesin P1. At low K+, the expression of stress response elements gcrR and codY, cell-adhesion-associated genes such as spaP and metabolism-associated genes such as bglP was induced at stationary phase (P<0...
May 22, 2017: Microbiology
https://www.readbyqxmd.com/read/28526864/a-broad-spectrum-bactericidal-lipopeptide-with-anti-biofilm-properties
#7
Ohad Meir, Fadia Zaknoon, Uri Cogan, Amram Mor
Previous studies of the oligoacyllysyl (OAK) series acyl-lysyl-lysyl-aminoacyl-lysine-amide, suggested their utility towards generating robust linear lipopeptide-like alternatives to antibiotics, although to date, none exhibited potent broad-spectrum bactericidal activity. To follow up on this premise, we produced a new analog (C14KKc12K) and investigated its properties in various media. Mechanistic studies suggest that C14KKc12K uses a non-specific membrane-disruptive mode of action for rapidly reducing viability of Gram-negative bacteria (GNB) similarly to polymyxin B (PMB), a cyclic lipopeptide used as last resort antibiotic...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526794/raffinose-induces-biofilm-formation-by-streptococcus-mutans-in-low-concentrations-of-sucrose-by-increasing-production-of-extracellular-dna-and-fructan
#8
Ryo Nagasawa, Tsutomu Sato, Hidenobu Senpuku
Streptococcus mutans is the primary etiological agent of dental caries and causes tooth decay by forming a firmly attached biofilm on tooth surfaces. Biofilm formation is induced by the presence of sucrose, which is a substrate for the synthesis of extracellular polysaccharides, but not in the presence of oligosaccharides. Nonetheless, in this study, we found that raffinose, which is an oligosaccharide with an intestinal regulatory function and antiallergic effect, induced biofilm formation by S. mutans in a mixed culture with sucrose which was at concentrations less than those required to induce biofilm formation directly...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28526785/effects-of-arginine-on-growth-virulence-gene-expression-and-stress-tolerance-by-streptococcus-mutans
#9
Brinta Chakraborty, Robert A Burne
Streptococcus mutans is a common constituent of oral biofilms and a primary etiologic agent of human dental caries. The bacteria associated with dental caries have a potent ability to produce organic acids from dietary carbohydrates and to grow and metabolize in acidic conditions. In contrast, many commensal bacteria produce ammonia through the arginine deiminase system (ADS), which moderates the pH of oral biofilms. Arginine metabolism by the ADS is a significant deterrent to the initiation and progression of dental caries...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28516115/a-modified-chromogenic-assay-for-determination-of-the-ratio-of-free-intracellular-nad-nadh-in-streptococcus-mutans
#10
Jonathon L Baker, Roberta C Faustoferri, Robert G Quivey
Nicotinamide adenine dinucleotide is a coenzyme present in all kingdoms of life and exists in two forms: oxidized (NAD(+)) and reduced (NADH). NAD(H) is involved in a multitude of essential metabolic redox reactions, providing oxidizing or reducing equivalents. The ratio of free intracellular NAD(+)/NADH is fundamentally important in the maintenance of cellular redox homeostasis (Ying, 2008). Various chromogenic cycling assays have been used to determine the ratio of NAD(+)/NADH in both bacterial and mammalian cells for more than forty years (Bernofsky and Swan, 1973; Nisselbaum and Green, 1969)...
August 20, 2016: Bio-protocol
https://www.readbyqxmd.com/read/28514868/phytochemical-composition-and-in-vitro-screening-of-the-antimicrobial-activity-of-essential-oils-on-oral-pathogenic-bacteria
#11
Roberta Tardugno, Federica Pellati, Ramona Iseppi, Moreno Bondi, Giacomo Bruzzesi, Stefania Benvenuti
In this study, the activity of essential oils (EOs) against microorganisms involved in oral diseases was evaluated. Fourteen EOs were selected and subjected to gas chromatographic analysis, including Illicium verum, Eucaliptus globulus, Eugenia caryophyllata, Leptospermum scoparium, Mentha arvensis, Mentha piperita, Myrtus communis, Salvia officinalis, Melaleuca alternifolia, Rosmarinus officinalis, Lavandula x intermedia, Thymus capitatus and Thymus vulgaris. These EOs were tested for their antimicrobial activity on Streptococcus mutans and Lactobacillus species clinically isolated from dental surgery patients...
May 17, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28513788/comparisons-of-iga-response-in-saliva-and-colostrum-against-oral-streptococci-species
#12
Barbara Bellocchio Bertoldo, Camilla Beatriz da Silva, Denise Bertulucci Rocha Rodrigues, Vinicius Rangel Geraldo-Martins, Virginia Paes Leme Ferriani, Ruchele Dias Nogueira
The present study compared IgA specificity against oral streptococci in colostrum and saliva samples. Sixty-two mother-and-child pairs were included; samples of colostrum (C) and saliva (MS) were collected from the mothers and saliva samples were collected from babies (BS). The specificity of IgA against Streptococcus mutans and S. mitis were analyzed by western blot. Only 30% of babies' samples presented IgA reactivity to S. mutans, while 74 and 80% of MS and C, respectively, presented this response. IgA reactivity to S...
May 15, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28513783/influence-of-addition-of-2-methacryloyloxy-ethyl-trimethylammonium-chloride-to-an-experimental-adhesive
#13
Fabrício Mezzomo Collares, Vicente Castelo Branco Leitune, Patrícia Franken, Clarissa Fatturi Parollo, Fabrício Aulo Ogliari, Susana Maria Werner Samuel
The aim of this study was to develop an experimental adhesive with addition of [2-(methacryloyloxy)ethyl]trimethylammonium chloride (METAC) and to evaluate its mechanical and biological properties and its in vitro antibacterial activity. An experimental adhesive resin was formulated with Bis-GMA, TEGDMA, and HEMA. The antibacterial monomer was added at concentrations of 1%, 2.5%, and 5% (METAC groups). A group without METAC addition was used as control. The experimental adhesives were evaluated as to their antibacterial potential against Streptococcus mutans, degree of conversion, and softening in ethanol for 2 hours...
May 4, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28513096/is-the-oral-fungal-pathogen-candida-albicans-a-cariogen
#14
REVIEW
Daniel Freitas Alves Pereira, Chaminda Jayampath Seneviratne, Cristiane Yumi Koga-Ito, Lakshman Perera Samaranayake
Pathobiology of dental caries is complex. Data from recent molecular microbiologic studies have further redefined the role of the oral microbiome in the etiology of dental caries. This new information challenges the conventional view on the hegemony of classic cariogenic prokaryotes such as Streptococcus mutans in caries aetiology, and raises the intriguing possibility of the participation of the eukaryotic oral fungal pathogen Candida in the caries process. The virulence attributes of Candida species such as their acidogenicity and aciduric nature, the ability to develop profuse biofilms, ferment and assimilate dietary sugars, and produce collagenolytic proteinases are all indicative of their latent cariogenic potential...
May 17, 2017: Oral Diseases
https://www.readbyqxmd.com/read/28512783/effect-of-silver-loaded-pmma-on-streptococcus-mutans-in-a-drip-flow-reactor
#15
Dustin L Williams, R Tyler Epperson, Jeffery P DeGrauw, Mattias B Nielsen, Nicholas B Taylor, Ryan D Jolley
Orthodontic retention has been proposed as a life-long commitment for patients who desire to maintain straight teeth. However, the presence of foreign material increases risk of bacterial colonization and caries formation, of which Streptococcus mutans is a key contributor. Multiple studies have assessed the ability of silver to be added to base plate material and resist attachment of S. mutans. However, it does not appear that long term washout in connection with biofilm growth under physiologically relevant conditions has been taken into consideration...
May 16, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28512279/antimicrobial-potential-of-plant-extracts-and-chemical-fractions-of-sideroxylon-obtusifolium-roem-schult-t-d-penn-on-oral-microorganisms
#16
Thaíse Pd Sampaio, Nathália Ao Cartaxo-Furtado, Ana Cd de Medeiros, Harley S Alves, Pedro L Rosalen, Jozinete V Pereira
AIM: The aim of this study is to evaluate the in vitro antimicrobial activity of plant extracts and chemical fractions of Sideroxylon obtusifolium T.D. Penn on Streptococcus mutans, Streptococcus oralis, Streptococcus salivarius, Streptococcus parasanguinis, and Candida albicans as well as to identify the chemical classes found in the bioactive extracts possessing better activity. MATERIALS AND METHODS: Freeze-dried hydroalcoholic extracts of the bark and leaves (LC and LF respectively) and ethanol extracts of bark and leaves (EC and EF respectively) of S...
May 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28511604/duplicated-or-hybridized-peptide-functional-domains-promote-oral-homeostasis
#17
T Basiri, N D Johnson, E B Moffa, Y Mulyar, P L Serra Nunes, M A A M Machado, W L Siqueira
Proteins that have existed for millions of years frequently contain repeats of functional domains within their primary structure, thereby improving their functional capacity. In the evolutionary young statherin protein contained within the in vivo-acquired enamel pellicle (AEP), we identified a single functional domain (DR9) located within the protein N-terminal portion that exhibits a higher affinity for hydroxyapatite and more efficient protection against enamel demineralization compared to other native statherin peptides...
May 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28511515/comparative-evaluation-of-antibacterial-and-adhesive-properties-of-chitosan-modified-glass-ionomer-cement-and-conventional-glass-ionomer-cement-an-in-vitro-study
#18
Arpan Debnath, Srivastava Bagepalli Kesavappa, Gyanendra Pratap Singh, Shruthi Eshwar, Vipin Jain, Madhuniranjan Swamy, Punith Shetty
INTRODUCTION: Recent studies have reported the incorporation of modifiers with conventional Glass Ionomer Cement (GIC) to enhance its antibacterial effect. One such modification being the addition of Chitosan (CH). However, these modifiers might affect the physical properties of the restorations. AIM: The aim of the present study was to investigate the effect of modifying the liquid phase of conventional GIC with 10% v/v CH on the antibacterial properties and adhesion to enamel in comparison to conventional GIC...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28510623/sensing-of-streptococcus-mutans-by-microscopic-imaging-ellipsometry
#19
Mai Ibrahim Khaleel, Yu-Da Chen, Ching-Hang Chien, Yia-Chung Chang
No abstract text is available yet for this article.
May 1, 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28507066/the-microbiome-of-site-specific-dental-plaque-of-children-with-different-caries-status
#20
Vincent P Richards, Andres J Alvarez, Amy R Luce, Molly Bedenbaugh, Mary Mitchell, Robert A Burne, Marcelle M Nascimento
The oral microbiota associated with the initiation and progression of dental caries has yet to be fully characterized. The Human Oral Microbe Identification using Next Generation Sequencing (HOMINGS) was used to analyze the microbiomes of site-specific supragingival dental plaques from children with different caries status. Fifty-five children (2-7 years) were assessed at baseline and 12-months, and grouped as: caries-free (CF), caries-active with enamel lesions (CAE), and caries-active with dentin carious lesions (CA)...
May 15, 2017: Infection and Immunity
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