keyword
MENU ▼
Read by QxMD icon Read
search

Streptococcus mutans

keyword
https://www.readbyqxmd.com/read/28330230/isolation-and-biological-evaluation-of-n-4-aminocyclooctyl-3-5-dinitrobenzamide-a-new-semisynthetic-derivative-from-the-mangrove-associated-actinomycete-pseudonocardia-endophytica-vuk-10
#1
Usha Kiranmayi Mangamuri, Muvva Vijayalakshmi, Sudhakar Poda, Bramanandam Manavathi, Bhujangarao Chitturi, Venkateswarlu Yenamandra
The present study was aimed to isolate novel bioactive compounds from actinomycetes species isolated from mangrove habitats. With this connection, Pseudonocardia endophytica (VUK-10) was isolated using dilution plate technique and was examined for its secondary metabolite profiling. After successive purification and spectroscopic characterization viz., FTIR, mass, NMR, DEPT, HMQC, HMBC, and COSY spectroscopy, two compounds were identified including a semi synthetic derivative N-(4-aminocyclooctyl)-3, 5-dinitrobenzamide (1), obtained from the precursor of novel natural product cyclooctane-1,4-diamine (3), along with a known compound 3-((1H-indol-6-yl) methyl) hexahydropyrrolo [1, 2-a] pyrazine-1, 4-dione (2)...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28327302/effect-of-monomer-blend-and-chlorhexidine-adding-on-physical-mechanical-and-biological-properties-of-experimental-infiltrants
#2
Luciana Tiemi Inagaki, Roberta Caroline Bruschi Alonso, Giovana Albamonte Spagnolo Araújo, Eduardo José Carvalho de Souza-Junior, Paula Cristina Anibal, José Francisco Höfling, Fernanda Miori Pascon, Regina Maria Puppin-Rontani
OBJECTIVES: The aim of the study was to evaluate antimicrobial inhibition zone, degree of conversion (DC) and Knoop hardness (KH) of experimental infiltrants. Experimental low viscosity monomer blends were prepared and chlorhexidine diacetate salt (CHX) (0.1% or 0.2%) was added comprising the groups: G1) TEGDMA; G2) TEGDMA/0.1CHX; G3) TEGDMA/0.2CHX; G4) TEGDMA/UDMA; G5) TEGDMA/UDMA/0.1CHX; G6) TEGDMA/UDMA/0.2CHX; G7) TEGDMA/BISEMA; G8) TEGDMA/BISEMA/0.1CHX; G9) TEGDMA/BISEMA/0.2CHX. Icon(®) was used as control group...
December 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28326699/-influence-of-surface-roughness-on-oral-streptococcal-adhesion-forces-to-dental-filling-materials
#3
Zheng Sainan, Jiang Li, Zhang Lei, Hao Liying, Ye Lu, Li Wei
OBJECTIVE: This study is to determine the common oral streptococcal adhesion forces by using composite resin and glass ionomer cement (GIC) with different degrees of surface roughness via atomic force microscopy (AFM) analysis. The influence of surface roughness on bacterial adhesion force is also discussed. METHODS: Polishing and grinding were applied to obtain 300, 200, 100, and 10 nm surfaces of light-cured composite resin and GIC samples. Surface topography was assessed by AFM analysis...
October 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28326155/dental-plaque-microbial-profiles-of-children-from-khartoum-sudan-with-congenital-heart-defects
#4
Hiba Mohamed Ali, Ellen Berggreen, Daniel Nguyen, Raouf Wahab Ali, Thomas E Van Dyke, Hatice Hasturk, Manal Mustafa
Few studies have focused on the bacterial species associated with the deterioration of the dental and gingival health of children with congenital heart defects (CHD). The aims of this study were (1) to examine the dental plaque of children with CHD in order to quantify bacterial load and altered bacterial composition compared with children without CHD; and (2) to investigate the correlation between the level of caries and gingivitis and dental biofilm bacteria among those children. In this cross-sectional study, participants were children (3-12 years) recruited in Khartoum State, Sudan...
2017: Journal of Oral Microbiology
https://www.readbyqxmd.com/read/28321584/antimicrobial-efficacy-and-mechanical-properties-of-bac-modified-hard-and-soft-denture-liners
#5
Pinar Altinci, Murat Mutluay, Eva Söderling, Arzu Tezvergil-Mutluay
This study investigated the antimicrobial efficacy and mechanical strength of hard and soft denture liners modified with benzalkonium chloride (BAC). The specimens (1 mm thickness, 8 mm diameter) were prepared by mixing 0.5, 1, 2 and 5 wt% BAC with soft (Sofreliner Medium, Tokuyama) and hard (Rebase II, Tokuyama) denture liners (n = 5/group). BAC was not added to the controls. Candida albicans ATCC 28366 (A 550 = 0.5) and Streptococcus mutans Ingbritt suspensions (A 550 = 0.35) were pipetted onto the specimens, and incubated for 4 h...
March 20, 2017: Odontology
https://www.readbyqxmd.com/read/28320314/quorum-sensing-of-streptococcus-mutans-is-activated-by-aggregatibacter-actinomycetemcomitans-and-by-the-periodontal-microbiome
#6
Szymon P Szafrański, Zhi-Luo Deng, Jürgen Tomasch, Michael Jarek, Sabin Bhuju, Manfred Rohde, Helena Sztajer, Irene Wagner-Döbler
BACKGROUND: The oral cavity is inhabited by complex microbial communities forming biofilms that can cause caries and periodontitis. Cell-cell communication might play an important role in modulating the physiologies of individual species, but evidence so far is limited. RESULTS: Here we demonstrate that a pathogen of the oral cavity, Aggregatibacter actinomycetemcomitans (A. act.), triggers expression of the quorum sensing (QS) regulon of Streptococcus mutans, a well-studied model organism for cariogenic streptococci, in dual-species biofilms grown on artificial saliva...
March 20, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28318169/-development-of-transcriptional-regulators-of-streptococcus-mutans-in-cariogenic-virulence
#7
Li Lan, Zhang Bowen, Li Jiyao
Some transcriptional regulators contribute to the expression of Streptococcus mutans (S. mutans) cariogenic virulence factors. Although the target sequence transcriptional regulators anchored on the cell wall and the molecular mechanism of the regulation of S. mutans are yet to be clarified, certain global regulators potentially associated with the cariogenicity of S. mutans have been identified. This review is about these related transcriptional regulators, their function, and possible mechanisms.
December 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28318157/-effects-of-nd-yag-laser-irradiation-on-the-root-surfaces-and-adhesion-of-streptococcus-mutans
#8
Li Yuanhong, Li Zhongcheng, Luo Mengqi, Shen Daonan, Zhang Shu, Meng Shu
OBJECTIVE: This study aimed to evaluate the effects of treatment with different powers of Nd: YAG laser irradiation on root surfaces and Streptococcus mutans (S. mutans) adhesion. METHODS: Extracted teeth because of severe periodontal disease were divided into the following four groups: control group, laser group 1, laser group 2, and laser group 3. After scaling and root planning, laser group 1, laser group 2, and laser group 3 were separately treated with Nd: YAG laser irradiation (4/6/8 W, 60 s); however, the control group did not receive the treatment...
December 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28292338/antibacterial-effect-of-calcium-hydroxide-with-or-without-chlorhexidine-as-intracanal-dressing-in-primary-teeth-with-apical-periodontitis
#9
Lea A B Silva, Priscilla C Romualdo, Raquel A B Silva, Maria C M Souza-Gugelmin, Luciana C Pazelli, Aldevina C De Freitas, Gisele Faria, Paulo Nelson-Filho
PURPOSE: The purpose of this study was to evaluate in vivo the antibacterial effect of calcium hydroxide (CH) dressings, with or without chlorhexidine (CHX), on human primary teeth with apical periodontitis. METHODS: Forty root canals in 40 children were selected. A first microbiological sample was obtained after coronal opening, and the teeth were randomly assigned to Group 1 (root canals filled with CH paste) and Group 2 (CH paste plus 1.0 percent CHX). After 30 days, the dressing was removed and the canals were allowed to remain empty for 72 hours...
January 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/28288290/effect-of-commonly-prescribed-liquid-medications-on-streptococcus-mutans-biofilm-an-in-vitro-study
#10
Samantha A Clark, LaQuia A Vinson, George Eckert, Richard L Gregory
OBJECTIVE: This study addressed the effect of pediatric liquid antibiotic medications on Streptococcus mutans UA159. These suspensions commonly contain sugars such as sucrose to make them more palatable for children. The study was designed to evaluate the effects of oral liquid antibiotics on Streptococcus mutans growth and biofilm formation. STUDY DESIGN: A 24 hour culture of S. mutans was treated with various concentrations of liquid medications commonly prescribed to children for odontogenic or fungal infections- amoxicillin, penicillin VK, clindamycin, and nystatin...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28286107/streptococcus-mutans-antigen-i-ii-and-autoimmunity-in-cardiovascular-diseases
#11
REVIEW
Alberta Lucchese
Infectious pathogens from the oral cavity cause oral diseases such as caries, gingivitis, periodontitis, endodontic infections, and alveolar osteitis, and often are also concomitant to systemic diseases, including cardiovascular disorders, stroke, preterm birth, diabetes, and pneumonia, among others. The relationship(s) between oral infections and systemic diseases are still unclear. Using the bacterial cell surface antigen I/II from S. mutans and cardiovascular diseases as a model, this study analyzes peptide commonalities that might underlie autoimmune crossreactions between the bacterial antigen and human proteins associated with cardiovascular disorders...
March 7, 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/28282113/metabolic-activity-based-assessment-of-antimicrobial-effects-by-d2o-labeled-single-cell-raman-microspectroscopy
#12
Yifan Tao, Yun Wang, Shi Huang, Pengfei Zhu, Wei E Huang, Jun-Qi Ling, Jian Xu
To combat the spread of antibiotic resistance, methods that quantitatively assess metabolism-inhibiting effects of drugs in a rapid and culture-independent manner are urgently needed. Here using four oral bacteria as models, we show that heavy water (D2O) based Single-cell Raman Microspectroscopy (D2O-Raman) can probe bacterial response to different drugs using the Raman shift at C-D (carbon-deuterium vibration) band in 2,040 to 2,300 cm-1 as a universal biomarker for metabolic activity at single bacterial cell resolution...
March 10, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28280743/nicotine-enhances-interspecies-relationship-between-streptococcus-mutans-and-candida-albicans
#13
Shiyu Liu, Wei Qiu, Keke Zhang, Xuedong Zhou, Biao Ren, Jinzhi He, Xin Xu, Lei Cheng, Mingyun Li
Streptococcus mutans and Candida albicans are common microorganisms in the human oral cavity. The synergistic relationship between these two species has been deeply explored in many studies. In the present study, the effect of alkaloid nicotine on the interspecies between S. mutans and C. albicans is explored. We developed a dual-species biofilm model and studied biofilm biomass, biofilm structure, synthesis of extracellular polysaccharides (EPS), and expression of glucosyltransferases (Gtfs). Biofilm formation and bacterial and fungal cell numbers in dual-species biofilms increased in the presence of nicotine...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28274037/antimicrobial-effects-of-garcinia-mangostana-on-cariogenic-microorganisms
#14
Sunitha Janardhanan, Jaideep Mahendra, A S Smiline Girija, Little Mahendra, Vijayashree Priyadharsini
INTRODUCTION: Garcinia mangostana commonly called as Mangosteen fruit has been used as an antibacterial agent since age old times. The mangosteen pericarp has proven to have antibacterial effect, but the effect of the same on cariogenic organisms has not been explored. The present study was an attempt to gain a better understanding of the antibacterial effect of mangosteen pericarp on the cariogenic bacteria, to unravel the therapeutic potential for the same. AIM: The aim of the study was to assess the antibacterial efficacy of the crude chloroform extract of mangosteen pericarp against cariogenic bacteria...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28271628/zinc-oxide-3d-microstructures-as-an-antimicrobial-filler-content-for-composite-resins
#15
Hércules Bezerra Dias, Maria Inês Basso Bernardi, Matheus Aparecido Dos Santos Ramos, Tamara Carolina Trevisan, Taís Maria Bauab, Antônio Carlos Hernandes, Alessandra Nara de Souza Rastelli
The aim of this study was to evaluate the antibacterial activity of a composite resin modified by 3D zinc oxide (ZnO) microstructures and to verify possible alterations on its mechanical properties. ZnO was synthesized by hydrothermal approach and characterized by X-ray diffraction (XRD), surface area by Brunauer, Emmett and Teller (BET), Fourier transform infrared spectroscopy (FTIR) and Field emission scanning electron microscopy (FESEM). The minimum inhibitory concentrations of ZnO against Streptococcus mutans, Escherichia coli, Staphylococcus aureus, and Candida albicans were determinated...
March 8, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28270703/effectiveness-of-salvadora-persica-extracts-against-common-oral-pathogens
#16
Hanan Balto, Ibrahim Al-Sanie, Sultan Al-Beshri, Abdullah Aldrees
OBJECTIVE: The purpose of this study was to evaluate the antibacterial activity of ethanol and hexane extracts of Salvadora persica against common oral pathogens. MATERIALS AND METHODS: Well diffusion, Minimum Inhibition Concentration (MIC), Minimum Bactericidal Concentration (MBC), and Broth microdilution tests were used to determine the optimum antimicrobial concentrations of S. persica extracts against Streptococcus mutans (S. mutans), Streptococcus sanguis (S...
January 2017: Saudi Dental Journal
https://www.readbyqxmd.com/read/28270052/experimental-and-statistical-methods-to-evaluate-antibacterial-activity-of-a-quaternary-pyridinium-salt-on-planktonic-biofilm-forming-and-biofilm-states
#17
Daneli López Pérez, Paula J Baker, Adam L Pintar, Jirun Sun, Nancy J Lin, Sheng Lin-Gibson
Robust evaluation and comparison of antimicrobial technologies are critical to improving biofilm prevention and treatment. Herein, a multi-pronged experimental framework and statistical models were applied to determine the effects of quaternary pyridinium salt, 4-acetyl-1-hexadecylpyridin-1-ium iodide (QPS-1), on Streptococcus mutans in the planktonic, biofilm-forming and biofilm cell states. Minimum inhibitory and bactericidal concentrations (MIC and MBC, respectively) were determined via common methods with novel application of statistical approaches combining random effects models and interval censored data to estimate uncertainties...
March 2017: Biofouling
https://www.readbyqxmd.com/read/28260888/the-response-of-human-osteoblasts-epithelial-cells-fibroblasts-macrophages-and-oral-bacteria-to-nanostructured-titanium-surfaces-a-systematic-study
#18
Xinchao Miao, Donghui Wang, Lianyi Xu, Jie Wang, Deliang Zeng, Shuxian Lin, Cui Huang, Xuanyong Liu, Xinquan Jiang
Nanotopography modification is a major focus of interest in current titanium surface design; however, the influence of the nanostructured surface on human cell/bacterium behavior has rarely been systematically evaluated. In this study, a homogeneous nanofiber structure was prepared on a titanium surface (Nano) by alkali-hydrothermal treatment, and the effects of this Nano surface on the behaviors of human MG-63 osteoblasts, human gingival epithelial cells (HGECs) and human gingival fibroblasts (HGFs) were evaluated in comparison with a smooth titanium surface (Smooth) by polishing and a micro-rough titanium surface (Micro) by sandblasting and acid etching...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28256775/enhanced-adhesion-of-streptococcus-mutans-to-hydroxyapatite-after-exposure-to-saliva
#19
Christian Spengler, Nicolas Thewes, Friederike Nolle, Thomas Faidt, Natalia Umanskaya, Matthias Hannig, Markus Bischoff, Karin Jacobs
Streptococcus mutans cells form robust biofilms on human teeth and are strongly related to caries incidents. Hence, understanding the adhesion of S. mutans in the human oral cavity is of major interest for preventive dentistry. In this study, we report on atomic force microscopy-based single-cell force spectroscopy measurements of S. mutans cells to hydroxyapatite surfaces. We observe for almost all measurements a significant difference in adhesion strength for S. mutans as well as for Staphylococcus carnosus cells...
March 3, 2017: Journal of Molecular Recognition: JMR
https://www.readbyqxmd.com/read/28253182/effectiveness-of-casein-phosphopeptide-amorphous-calcium-phosphate-and-lysozyme-lactoferrin-and-lactoperoxidase-in-reducing-streptococcus-mutans-counts-in-dentinal-caries
#20
Sérgio Luiz Pinheiro, Giuliana Rodrigues Azenha, Giovana Spagnolo Albamonte Araujo, Regina Maria Puppin Rontani
This study compared the capacity of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) to that of a combination of lysozyme, lactoferrin, and lactoperoxidase (LLL) in root canal disinfectant for reducing the Streptococcus mutans counts from dentinal caries. Forty human permanent third molars were selected, and flat dentin surfaces were created. Carious lesions were induced using a microbiological model. The specimens were randomly divided into 2 groups (n = 20) according to the type of agent used: group 1, CPP-ACP; group 2, LLL...
March 2017: General Dentistry
keyword
keyword
105836
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"