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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/28327266/milk-sweetened-with-xylitol-a-proof-of-principle-caries-prevention-randomized-clinical-trial
#3
Donald L Chi, Graciela Zegarra, Elsa C Vasquez Huerta, Jorge L Castillo, Peter Milgrom, Marilyn C Roberts, Ailin R Cabrera-Matta, Ana P Merino
PURPOSE: To evaluate the efficacy of xylitol-sweetened milk as a caries-preventive strategy. METHODS: In this nine-month prospective proof-of-principle trial, Peruvian schoolchildren were randomized to one of five different milk groups: (1) eight g of xylitol per 200 mL milk once per day; (2) four g of xylitol per 100 mL milk twice per day; (3) eight g of sorbitol per 200 mL milk once per day; (4) four g of sorbitol per 100 mL milk twice per day; or (5) eight g of sucrose per 200 mL milk once per day...
September 15, 2016: Journal of Dentistry for Children
https://www.readbyqxmd.com/read/28327128/the-investigation-of-helicobacter-pylori-in-the-dental-biofilm-and-saliva-samples-of-children-with-dyspeptic-complaints
#4
Damla Aksit Bıcak, Serap Akyuz, Binnur Kıratlı, Merve Usta, Nafiye Urganci, Burcin Alev, Aysen Yarat, Fikrettin Sahin
BACKGROUND: The oral cavity can be an extra-gastric reservoir for Helicobacter pylori (H.pylori). This can play a role in the pathogenesis of halitosis, glossitis, recurrent aphthous stomatitis, and dental caries. The present study was conducted to detect the presence of H.pylori within the dental biofilm and in saliva samples collected from children suffering from dyspepsia and children without any gastrointestinal complaints. Associations with gastric infection, halitosis, and some oral parameters were also evaluated...
March 21, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28326699/-influence-of-surface-roughness-on-oral-streptococcal-adhesion-forces-to-dental-filling-materials
#5
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
#6
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
#7
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
#8
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/28319869/biofilm-inhibition-formation-of-clinical-strains-of-pseudomonas-aeruginosa-mutans-photocatalytic-activity-of-azo-dye-and-gc-ms-analysis-of-leaves-of-lagerstroemia-speciosa
#9
V Sai Saraswathi, Neethu Kamarudheen, K V Bhaskara Rao, K Santhakumar
The investigation was conducted to analyse the bioactive compounds from the leaf extracts of L. speciosa by GC-MS. The extracts were screened for antibacterial and antibiofilm activities against potential clinical strains. The bioactive compounds from the leaves of L. speciosa were extracted by soxhlet continuous extraction method and their chemical composition was analysed by Gas Chromatography-Mass Spectroscopy (GC-MS). The antibacterial activity was evaluated against clinical strain like Staphylococcus aureus, Escherichia coli, P...
March 9, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28318169/-development-of-transcriptional-regulators-of-streptococcus-mutans-in-cariogenic-virulence
#10
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
#11
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/28303470/the-caries-preventive-effect-of-1-year-use-of-low-dose-xylitol-chewing-gum-a-randomized-placebo-controlled-clinical-trial-in-high-caries-risk-adults
#12
Fabio Cocco, Giovanna Carta, Maria Grazia Cagetti, Laura Strohmenger, Peter Lingström, Guglielmo Campus
OBJECTIVES: The caries preventive effect of long-term use (1 year) of low-dosage (2.5 g/die) of xylitol chewing gum in a high-caries-risk adult population was evaluated. MATERIALS AND METHODS: In this randomized clinical trial, 179 high-caries-risk adults were assigned to two experimental groups, xylitol and polyols. Caries status, salivary mutans streptococci (MS), and plaque pH were re-evaluated after 2 years from baseline in 66 xylitol and 64 polyol subjects...
March 16, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28303246/cytotoxicity-and-antimicrobial-effects-of-a-new-fast-set-mta
#13
Michelle Shin, Jung-Wei Chen, Chi-Yang Tsai, Raydolfo Aprecio, Wu Zhang, Ji Min Yochim, Naichia Teng, Mahmoud Torabinejad
Purpose. To compare the biocompatibility and antimicrobial effectiveness of the new Fast-Set MTA (FS-MTA) with ProRoot MTA (RS-MTA). Methods. The agar overlay method with neutral red dye was used. L929 mouse fibroblast cells were cultured. The liquid and oil extracts and solid test material were placed on the agar overlay, four samples for each material. Phenol was used as the positive control and cottonseed oil and MEM extracts were used as negative controls. Cytotoxicity was examined by measuring the zones of decolorization and evaluating cell lysis under an inverted microscope using the established criteria after 24 and 48 hours...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28301014/evaluation-of-surface-roughness-and-bacterial-adhesion-on-tooth-enamel-irradiated-with-high-intensity-lasers
#14
Ruchele D Nogueira, Camilla B Silva, Cesar P Lepri, Regina Guenka Palma-Dibb, Vinicius R Geraldo-Martins
The aim was to evaluate the surface roughness and bacterial adhesion on enamel irradiated with high intensity lasers, associated or not to a fluoride varnish. Eighty fragments of bovine enamel were equally divided in 8 groups (n=10). Group 1 was not treated and Group 2 received only a 5% fluoride varnish application. The other groups were irradiated with an Er:Cr:YSGG (8.92 J/cm2), an Nd:YAG (84.9 J/cm2) and a diode laser (199.04 J/cm2), associated or not to a 5% fluoride varnish. The surface roughness was measured before and after treatments...
January 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28301013/influence-of-different-dentin-substrate-caries-affected-caries-infected-sound-on-long-term-%C3%AE-tbs
#15
Ana Rosa Costa, Franklin Garcia-Godoy, Lourenço Correr-Sobrinho, Lucas Zago Naves, Luís Henrique Araújo Raposo, Fabíola Galbiatti de Carvalho, Mário Alexandre Coelho Sinhoreti, Regina Maria Puppin-Rontani
The aim of this study was to evaluate the μTBS in different dentin substrates and water-storage periods. Twenty-four dentin blocks obtained from sound third molars were randomly divided into 3 groups: Sound dentin (Sd), Caries-affected dentin (Ca) and Caries-infected dentin (Ci). Dentin blocks from Ca and Ci groups were subjected to artificial caries development (S. mutans biofilm). The softest carious tissue was removed using spherical drills under visual inspection with Caries Detector solution (Ca group)...
January 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28298980/biological-and-antibacterial-properties-of-a-new-silver-fiber-post-in-vitro-evaluation
#16
Claudio Poggio, Federico Trovati, Matteo Ceci, Marco Chiesa, Marco Colombo, Giampiero Pietrocola
BACKGROUND: The incorporation of nano silver particles (AgNPs) to improve antibacterial properties of dental materials has become increasingly common. The aim of the present study was to compare the antibacterial activity and cytotoxicity effects of different fiber posts: glass fiber post, quartz fiber post, nano fiber post and silver fiber post. MATERIAL AND METHODS: The antibacterial activity against S. mutans, S. salivarius and S. sanguis was evaluated by using the agar disc diffusion test (ADT)...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28292338/antibacterial-effect-of-calcium-hydroxide-with-or-without-chlorhexidine-as-intracanal-dressing-in-primary-teeth-with-apical-periodontitis
#17
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
#18
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
#19
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
#20
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
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