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https://www.readbyqxmd.com/read/29142874/evaluation-of-antimicrobial-activity-and-efficacy-of-herbal-oils-and-extracts-in-disinfection-of-gutta-percha-cones-before-obturation
#1
Chetana S Makade, Pratima R Shenoi, Elakshi Morey, Ameya V Paralikar
Objectives: Literature has shown that micro-organisms contaminate gutta percha (GP) during storage and manipulation. Till date herbal extracts are not explored as an alternative medicament for pre-operative chairside disinfection of GP cones. The purpose of our study was to evaluate the antimicrobial activity and efficacy of lemon grass oil (LG), basil oil (BO), and obicure tea extract (OT) in disinfecting GP cones before obturation. Materials and Methods: Agar diffusion method was used to evaluate the antimicrobial efficacy of LG, BO, OT, and sodium hypochlorite (control) against common contaminants, namely, Enterococcus faecalis, Staphylococcus aureus, and Candida albicans...
November 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29142640/evaluation-of-c-albicans-and-s-mutans-adherence-on-different-provisional-crown-materials
#2
Gulsum Sayin Ozel, Mehmet Burak Guneser, Ozgur Inan, Ayce Unverdi Eldeniz
PURPOSE: Bacterial adhesion on provisional crown materials retained for a long time can influence the duration for which permanent prosthetic restorations can be healthily worn in the oral cavity. The aim of this study was to compare seven different commonly used provisional crown materials with regard to Streptococcus mutans and Candida albicans surface adhesion. MATERIALS AND METHODS: For each group, twenty specimens of the provisional fixed prosthodontic materials TemDent (Schütz), Imıdent (Imıcryl), Tab 2000 (Kerr), Structur Premium (Voco), Systemp (Ivoclar Vivadent), Acrytemp (Zhermack), and Takilon-BBF (Takilon) were prepared (diameter, 10...
October 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29140257/synthesis-spectroscopic-characterization-and-antimicrobial-potential-of-certain-new-isatin-indole-molecular-hybrids
#3
Reem I Al-Wabli, Azza S Zakaria, Mohamed I Attia
Molecular hybridization has a wide application in medicinal chemistry to obtain new biologically active compounds. New isatin-indole molecular hybrids 5a-n have been synthesized and characterized by various spectroscopic tools. The in vitro antimicrobial potential of the prepared compounds 5a-n was assessed using diameter of the inhibition zone (DIZ) and minimum inhibitory concentration (MIC) assays against a panel of Gram-negative bacteria, Gram-positive bacteria and fungi. Most of the synthesized compounds 5a-n showed weak activities against Gram-negative bacteria while compounds 5b and 5c exhibited good activities against Gram-positive bacteria...
November 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29138481/quadoctomycin-a-48-membered-macrolide-antibiotic-from-streptomyces-sp-mm168-141f8
#4
Ryuichi Sawa, Yumiko Kubota, Maya Umekita, Masaki Hatano, Chigusa Hayashi, Masayuki Igarashi
Drug-resistant bacteria are still emerging, and screening of new skeletal antibiotics is important. During our continuous screening for antimicrobial agents, we discovered a new antimicrobial, named quadoctomycin, from solid culture of Streptomyces sp. MM168-141F8. The substance was purified by solvent extraction, silica gel chromatography and HPLC. Structural elucidation of quadoctomycin was performed by MS and NMR analyses and chemical degradation. Quadoctomycin possesses a 48-membered polyol macrolide skeleton in which an α-D-mannoside is connected to C-22 by an O-glycosidic linkage...
November 15, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/29135948/effect-of-a-lactobacillus-salivarius-probiotic-on-a-double-species-streptococcus-mutans-and-candida-albicans-caries-biofilm
#5
Wirginia Krzyściak, Dorota Kościelniak, Monika Papież, Palina Vyhouskaya, Katarzyna Zagórska-Świeży, Iwona Kołodziej, Beata Bystrowska, Anna Jurczak
The aim of the study was to evaluate the anti-cariogenic effects of Lactobacillus salivarius by reducing pathogenic species and biofilm mass in a double-species biofilm model. Coexistence of S. mutans with C. albicans can cause dental caries progression or recurrence of the disease in the future. Fifty-nine children with diagnosed early childhood caries (ECC) were recruited onto the study. The condition of the children's dentition was defined according to the World Health Organization guidelines. The participants were divided into children with initial enamel demineralization and children showing dentin damage...
November 14, 2017: Nutrients
https://www.readbyqxmd.com/read/29133884/epha2-is-an-epithelial-cell-pattern-recognition-receptor-for-fungal-%C3%AE-glucans
#6
Marc Swidergall, Norma V Solis, Michail S Lionakis, Scott G Filler
Oral epithelial cells discriminate between pathogenic and non-pathogenic stimuli, and only induce an inflammatory response when they are exposed to high levels of a potentially harmful microorganism. The pattern recognition receptors (PRRs) in epithelial cells that mediate this differential response are poorly understood. Here, we demonstrate that the ephrin type-A receptor 2 (EphA2) is an oral epithelial cell PRR that binds to exposed β-glucans on the surface of the fungal pathogen Candida albicans. Binding of C...
November 13, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/29133097/biological-and-textural-properties-of-underutilized-exudate-gums-of-jammu-and-kashmir-india
#7
Mudasir Bashir, Tuba Usmani, Sundaramoorthy Haripriya, Tanveer Ahmed
Three different exudate gums were studied for their in-vitro antioxidant activity, functional and textural properties. In-vitro antioxidant activity of the gum exudates was evaluated in terms of DPPH radical scavenging, hydroxyl radical scavenging, reducing power and phenolic content assays. Among the gum exudates, almond gum exhibited maximum DPPḢ inhibition of 35.52±1.125% followed by apricot gum and gum arabic at the concentration of 1mg/mL. Gum arabic had significantly higher reducing power than the other exudate gums...
November 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29130365/lupane-triterpenoids-antioxidant-potential-and-antimicrobial-activity-of-myrciaria-floribunda-h-west-ex-willd-o-berg
#8
Maycow Marcos L de Azevedo, Márcia M Cascaes, Giselle Maria S P Guilhon, Eloisa Helena A Andrade, Maria das Graças B Zoghbi, Joyce Kelly R da Silva, Lourivaldo S Santos, Silvia Helena M da Silva
Chemical composition of the methanol extract of Myrciaria floribunda leaves was investigated. The nor-lupane triterpenoids platanic acid and messagenic I acid were identified, along with other known triterpenoids (betulinic aldehyde, ursolic acid acetate and betulinic acid), a new lupane triterpenoid (2α,6α,30-trihydroxybetulinic acid) and the flavonoids catechin, quercetrin and mirycitrin. The structures were determined by spectroscopic methods (NMR, LC-MS, GC-MS). The major isolated compound was betulinic acid...
November 13, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29130039/a-sustained-release-membrane-of-thiazolidinedione-8-effect-on-formation-of-a-candida-bacteria-mixed-biofilm-on-hydroxyapatite-in-a-continuous-flow-model
#9
Mark Feldman, Julia Shenderovich, Eran Lavy, Michael Friedman, Doron Steinberg
Thiazolidinediones (TZDs) have been found to act as effective quorum sensing quenchers, capable of preventing biofilm formation. Our previous studies demonstrated a profound antibiofilm effect of the TZD derivative thiazolidinedione-8 (S-8), either in solution or incorporated into a sustained-release membrane (SRM-S-8) under batch conditions. In the present study, we used a constant depth film fermenter model in order to investigate the impact of SRM-S-8 on mixed C. albicans-S. mutans biofilm development, under flow conditions...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29129987/increasing-the-fungicidal-action-of-amphotericin-b-by-inhibiting-the-nitric-oxide-dependent-tolerance-pathway
#10
Kim Vriens, Phalguni Tewari Kumar, Caroline Struyfs, Tanne L Cools, Pieter Spincemaille, Tadej Kokalj, Belém Sampaio-Marques, Paula Ludovico, Jeroen Lammertyn, Bruno P A Cammue, Karin Thevissen
Amphotericin B (AmB) induces oxidative and nitrosative stresses, characterized by production of reactive oxygen and nitrogen species, in fungi. Yet, how these toxic species contribute to AmB-induced fungal cell death is unclear. We investigated the role of superoxide and nitric oxide radicals in AmB's fungicidal activity in Saccharomyces cerevisiae, using a digital microfluidic platform, which enabled monitoring individual cells at a spatiotemporal resolution, and plating assays. The nitric oxide synthase inhibitor L-NAME was used to interfere with nitric oxide radical production...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29129632/synthesis-characterization-of-zno-chitosan-nanocomposites-and-evaluation-of-its-antifungal-activity-against-pathogenic-candida-albicans
#11
S H S Dananjaya, R Saravana Kumar, Minyang Yang, Chamilani Nikapitiya, Jehee Lee, Mahanama De Zoysa
In this study, we investigated the antifungal activity and cytotoxicity of ZnO-chitosan nanocomposites against Candida albicans and human epithelial type 2 (HEp2) cells, respectively. The crystalline phase, morphology, composition, particle size and optical absorption properties of the synthesized ZnO-C NCs were systematically investigated by various contemporary methods The X-ray diffraction analysis results showed characteristic diffraction peaks corresponding to both ZnO and chitosan, while field-emission scanning electron microscopy (FESEM) displayed clusters of spherical shaped particulate morphology...
November 9, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29128674/staged-development-of-long-lived-tcr%C3%AE-%C3%AE-th17-resident-memory-t-cell-population-to-candida-albicans-after-skin-infection
#12
Chang Ook Park, Xiujun Fu, Xiaodong Jiang, Youdong Pan, Jessica E Teague, Nicholas Collins, Tian Tian, John T O'Malley, Ryan O Emerson, Ji Hye Kim, Yookyung Jung, Rei Watanabe, Robert C Fuhlbrigge, Francis R Carbone, Thomas Gebhardt, Rachael A Clark, Charles P Lin, Thomas S Kupper
BACKGROUND: Candida albicans is a dimorphic fungus to which humans are exposed early in life and by adulthood it is part of the mycobiome of skin and other tissues. Neonatal skin lacks resident memory T (TRM) cells, but in adults the C. albicans skin test is a surrogate for immunocompetence. Young adult mice raised under SPF conditions are naive to C. albicans, and have recently been shown to have an immune system resembling that of neonatal humans. OBJECTIVE: We studied the evolution of the adaptive cutaneous immune response to Candida...
November 8, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29127943/quantum-dot-cramoll-lectin-as-novel-conjugates-to-glycobiology
#13
Cássia R A Cunha, Camila G Andrade, Maria I A Pereira, Paulo E Cabral Filho, Luiz B Carvalho, Luana C B B Coelho, Beate S Santos, Adriana Fontes, Maria T S Correia
The optical properties of quantum dots (QDs) make them useful tools for biology, especially when combined with biomolecules such as lectins. QDs conjugated to lectins can be used as nanoprobes for carbohydrate expression analysis, which can provide valuable information about glycosylation changes related to cancer and pathogenicity of microorganisms, for example. In this study, we evaluated the best strategy to conjugate Cramoll lectin to QDs and used the fluorescent labeling of Candida albicans cells as a proof-of-concept...
October 25, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29126627/-clinical-and-mycological-characteristics-of-onychomycosis-due-to-candida-at-institut-pasteur-of-c%C3%A3-te-d-ivoire
#14
K E Angora, A Ira-Bonouman, A H Vanga-Bosson, A Konaté, F K Kassi, K Tuo, K Sylla-Thanon, P C Kiki-Barro, S Miezan, A V Bedia-Tanoh, V Djohan, W Yavo, E H Menan, A T Offianan
OBJECTIVE: This study aims to study the clinical and mycological characteristics of onychomycosis due to Candida in mycology unit of Institut Pasteur of Côte d'Ivoire. PATIENTS AND METHODS: This is a retrospective study which was carried out on patients from 1990 to 2016 for mycological diagnosis of onychomycosis and which socio-demographic characteristics, direct examination and culture results were recorded. RESULTS: In this study, 1898 patient files were selected...
November 7, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/29125139/salivary-proteins-and-microbiota-as-biomarkers-for-early-childhood-caries-risk-assessment
#15
REVIEW
Abdullah S Hemadi, Ruijie Huang, Yuan Zhou, Jing Zou
Early childhood caries (ECC) is a term used to describe dental caries in children aged 6 years or younger. Oral streptococci, such as Streptococcus mutans and Streptococcus sorbrinus, are considered to be the main etiological agents of tooth decay in children. Other bacteria, such as Prevotella spp. and Lactobacillus spp., and fungus, that is, Candida albicans, are related to the development and progression of ECC. Biomolecules in saliva, mainly proteins, affect the survival of oral microorganisms by multiple innate defensive mechanisms, thus modulating the oral microflora...
November 10, 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/29123398/triclosan-resistance-reversion-by-encapsulation-in-chitosan-coated-nanocapsule-containing-%C3%AE-bisabolol-as-core-development-of-wound-dressing
#16
João Guilherme B De Marchi, Denise S Jornada, Fernanda K Silva, Ana L Freitas, Alexandre M Fuentefria, Adriana R Pohlmann, Silvia S Guterres
The use of nanoparticles may be particularly advantageous in treating bacterial infections due to their multiple simultaneous mechanisms of action. Nanoencapsulation is particularly useful for lipophilic drugs. In this scenario, triclosan is considered a good candidate due to its lipophilicity, broad-spectrum activity, and safety. In the present study, we have developed and characterized an antimicrobial suspension of triclosan and α-bisabolol against pathogenic strains that are resistant (Pseudomonas aeruginosa) and susceptible (Escherichia coli, Staphylococcus aureus, and Candida albicans) to triclosan...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29113746/quinoline-derivatives-bearing-pyrazole-moiety-synthesis-and-biological-evaluation-as-possible-antibacterial-and-antifungal-agents
#17
Mohamed F El Shehry, Mostafa M Ghorab, Samir Y Abbas, Eman A Fayed, Said A Shedid, Yousry A Ammar
In an attempt for development of new antimicrobial agents, three series of quinoline derivatives bearing pyrazole moiety have been synthesized. The first series was synthesized through the synthesis of 4-(quinolin-2-yloxy)benzaldehyde and 4-(quinolin-2-yloxy)acetophenone and then treatment with ketone or aldehyde derivatives to afford the corresponding chalcones. Cyclization of the latter chalcones with hydrazine derivatives led to the formation of new pyrazoline derivatives. The second series was synthesized via the synthesis of 2-hydrazinylquinoline and then treatment with formylpyrazoles to afford the corresponding hydrazonyl pyrazole derivatives...
October 19, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29112318/antimicrobial-activity-of-broccoli-brassica-oleracea-var-italica-cultivar-avenger-against-pathogenic-bacteria-phytopathogenic-filamentous-fungi-and-yeast
#18
R D Pacheco-Cano, R Salcedo-Hernández, J E López-Meza, D K Bideshi, J E Barboza-Corona
AIMS: The objective of this study was to show whether the edible part of broccoli has antibacterial and antifungal activity against microorganism of importance in human health and vegetable spoilage, and to test if this effect was partially due to antimicrobial peptides. METHODS AND RESULTS: Crude extracts were obtained from florets and stems of broccoli cultivar Avenger and the inhibitory effect was demonstrated against pathogenic bacteria (Bacillus cereus, Staphylococcus xylosus, S...
November 7, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29112170/psn-pc-a-novel-antimicrobial-and-anti-biofilm-peptide-from-the-skin-secretion-of-phyllomedusa-camba-with-cytotoxicity-on-human-lung-cancer-cell
#19
Xianhui Wu, Jinhuo Pan, Yue Wu, Xinping Xi, Chengbang Ma, Lei Wang, Mei Zhou, Tianbao Chen
Peptides derived from amphibian skin secretion are promising drug prototypes for combating widespread infection. In this study, a novel peptide belonging to the phylloseptin family of antimicrobial peptides was isolated from the skin secretion of the Phyllomedusa camba, namely phylloseptin-PC (PSN-PC). The biosynthetic precursor was obtained by molecular cloning and the mature peptide sequence was confirmed through tandem mass spectrometry (MS/MS) fragmentation sequencing in the skin secretion. The synthetic replicate exhibited a broad spectrum antimicrobial activity against Staphylococcus aureus, methicillin-resistant Staphylococcus aureus,Escherichia coli, Pseudomonas aeruginosa, Candida albicans at concentrations of 2, 2, 8, 32 and 2 µM, respectively...
November 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29112162/syntheses-of-novel-4-substituted-n-5-amino-1h-1-2-4-triazol-3-yl-pyridine-3-sulfonamide-derivatives-with-potential-antifungal-activity
#20
Krzysztof Szafrański, Jarosław Sławiński, Anna Kędzia, Ewa Kwapisz
Candidiasis represent a serious threat for patients with altered immune responses. Therefore, we have undertaken the synthesis of compounds comprising a pyridine-3-sulfonamide scaffold and known antifungally active 1,2,4-triazole substituents. Thus a series of novel 4-substituted N-(5-amino-1H-1,2,4-triazol-3-yl)pyridine-3-sulfonamides have been synthesized by multistep reactions starting from 4-chloropyridine-3-sulfonamide via N'-cyano-N-[(4-substitutedpyridin-3-yl)sulfonyl]carbamimidothioates which were further converted with hydrazine hydrate to the corresponding 1,2,4-triazole derivatives 26-36...
November 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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