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https://www.readbyqxmd.com/read/29140372/cytotoxicity-of-dental-implants-the-effects-of-ultrastructural-elements
#1
Ebru Cal, Vildan Bozok Cetintas, Hayal Boyacioglu, Pelin Güneri
PURPOSE: In this in vitro study, the purpose was to assess the cytotoxicity profiles of seven commercial dental implant materials by using cell culture methods on an osteoblastic cell line. MATERIALS AND METHODS: The microstructure of seven commercial dental implants (each given a letter code) was investigated via scanning electron microscopy and energy-dispersive x-ray analysis. Medium extracts were collected on the first and fifth days for each group and tested using MC3T3-E1 cell line...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29134404/curcumin-mediated-anti-microbial-photodynamic-therapy-against-candida-dubliniensis-biofilms
#2
Paula Volpato Sanitá, Ana Cláudia Pavarina, Lívia Nordi Dovigo, Ana Paula Dias Ribeiro, Mariana Carvalho Andrade, Ewerton Garcia de Oliveira Mima
The purpose of this study was to evaluate the effectiveness of anti-microbial photodynamic therapy (aPDT) mediated by curcumin (Cur) associated with LED light against biofilms of Candida dubliniensis, and further, investigate cellular uptake and drug penetration through the biofilms under confocal laser scanning microscopy (CLSM). Four C. dubliniensis strains were tested: three clinical isolates from HIV-positive patients and one reference strain (CBS 7987). Biofilms were treated with three Cur concentrations (20...
November 13, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29111401/biofilm-production-is-not-associated-with-poor-clinical-outcome-in-485-patients-with-staphylococcus-aureus-bacteremia
#3
María Guembe, Beatriz Alonso, José Lucio, María Jesús Pérez-Granda, Raquel Cruces, Carlos Sánchez-Carrillo, Ana Fernández-Cruz, Emilio Bouza
OBJECTIVE: Staphylococcus aureus biofilm may constitute a major cause of virulence. Our main objective was to analyze whether there was an association between biofilm production and poor outcome in patients with S. aureus bacteremia. METHODS: We studied 485 S. aureus strains isolated from the blood of patients with bacteremia from 2012 to 2015. We assessed in vitro biomass production using the crystal violet assay (CV) and metabolic activity using the tetrazolium salt assay (XTT)...
October 27, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29105633/evaluation-of-antimicrobial-cytotoxic-and-genotoxic-activities-of-ganoderma-lucidum-reishi-mushroom
#4
Bulent Ergun
Ganoderma lucidum (GL) is a mushroom used as a traditional remedy for the treatment of various infections since ancient times. This study, was aimed to investigate antimicrobial activity potential of GL against Staphylococcus aureus, Enterococcus faecalis, Listeria monocytogenes, Klebsiella pneumoniae, Pseudomonas aeruginosa, Escherichia coli, Candida albicans, Candida glabrata, Candida krusei, and Candida parapsilopsis. Furthermore, it was also aimed to evaluate the toxicity potential of GL. Antimicrobial activities were screened by using microbroth dilution method...
September 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29065554/new-triterpenoid-saponins-from-the-herb-hylomecon-japonica
#5
Yan-Fei Qu, Jing-Yu Gao, Jing Wang, Yan-Mei Geng, Yu Zhou, Cheng-Xin Sun, Fei Li, Lei Feng, Meng-Juan Yu, Guang-Shu Wang
Background: Hylomecon japonica, a plant of the Papaveraceae family which is well-known for the alkaloids they produce, is a perennial plant widely distributed in the northeast, central and east regions of China. Although a variety of chemical constituents, including alkaloids, flavonoids, and megastigmoids, have been isolated from H. japonica, the investigation of saponins in H. japonica has not been reported until now. Methods: Various separation techniques, including polyporous resin column chromatography, silica gel column chromatography and hemi-preparative HPLC were applied to the isolation of triterpenoid saponins, and chemical methods such as acid hydrolysis and spectroscopic methods including HRESIMS and NMR were applied to their structure elucidation, and the XTT reduction method was used to assay cytotoxicity...
October 23, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29061810/anticancer-effects-of-colchicine-on-hypopharyngeal-cancer
#6
Jung Hae Cho, Young Hoon Joo, Eun Young Shin, Eun Ji Park, Min Sik Kim
Colchicine is an alkaloid widely used for the treatment of inflammatory diseases, such as gout. It suppresses cell division by inhibiting mitosis. We investigated the anticancer effects of colchicine on human hypopharyngeal cancer cells and the mechanisms underlying its anticancer effects. XTT cell proliferation assay showed that colchicine inhibited the growth and proliferation of human hypopharyngeal cancer cells (FaDu and SNU1041) in a dose- and time-dependent manner. Colchicine also inhibited the migration, invasion, and adhesion of hypopharyngeal cancer cells in a dose-dependent manner...
November 2017: Anticancer Research
https://www.readbyqxmd.com/read/29048370/migration-rate-inhibition-of-breast-cancer-cells-treated-by-caffeic-acid-and-caffeic-acid-phenethyl-ester-an-in-vitro-comparison-study
#7
Agata Kabała-Dzik, Anna Rzepecka-Stojko, Robert Kubina, Żaneta Jastrzębska-Stojko, Rafał Stojko, Robert Dariusz Wojtyczka, Jerzy Stojko
One of the deadliest cancers among women is a breast cancer. Research has shown that two natural substances occurring in propolis, caffeic acid (CA) and caffeic acid phenethyl ester (CAPE), have significant anticancer effects. The purpose of our in vitro study was to compare cytotoxic activity and migration rate inhibition using CA and CAPE (doses of 50 and 100 µm) against triple-negative, MDA-MB-231 breast adenocarcinoma line cells, drawn from Caucasian women. Viability was measured by XTT-NR-SRB assay (Tetrazolium hydroxide-Neutral Red-Sulforhodamine B) for 24 h and 48 h periods...
October 19, 2017: Nutrients
https://www.readbyqxmd.com/read/29047237/proteus-vulgaris-and-proteus-mirabilis-decrease-candida-albicans-biofilm-formation-by-suppressing-morphological-transition-to-its-hyphal-form
#8
Kyoung Ho Lee, Su Jung Park, Sun Ju Choi, Joo Young Park
PURPOSE: Candida albicans (C. albicans) and Proteus species are causative agents in a variety of opportunistic nosocomial infections, and their ability to form biofilms is known to be a virulence factor. In this study, the influence of co-cultivation with Proteus vulgaris (P. vulgaris) and Proteus mirabilis (P. mirabilis) on C. albicans biofilm formation and its underlying mechanisms were examined. MATERIALS AND METHODS: XTT reduction assays were adopted to measure biofilm formation, and viable colony counts were performed to quantify yeast growth...
November 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29042079/cytotoxicity-and-dna-double-strand-breaks-in-human-gingival-fibroblasts-exposed-to-eluates-of-dental-composites
#9
Yang Yang, Franz-Xaver Reichl, Jianwei Shi, Xiuli He, Reinhard Hickel, Christof Högg
OBJECTIVE: Previously, single composite components were used to study cytotoxicity and induction of DNA double-strand breaks (DNA-DSBs) of dental composite resins. In the present study, cytotoxicity and induction of DNA-DSBs in human gingival fibroblasts (HGFs) were investigated with dental composite eluates consisting of multiple components. The eluates were qualified and quantified. METHODS: The composites Esthet.X(®) HD, Venus(®), X-tra fil(®), CLEARFIL™ AP-X, Admira(®) Fusion and QuiXfil(®) were polymerized and immersed into Dulbecco's modified Eagle's medium (DMEM) for 72h...
October 14, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29024714/antibacterial-effect-and-bond-strength-of-a-modified-dental-adhesive-containing-the-peptide-nisin
#10
Meixuan Su, Shunyi Yao, Lisha Gu, Zihua Huang, Sui Mai
This study attempted to incorporate the antibacterial peptide nisin into an etch-and-rinse dental adhesive to evaluate the antibacterial activity of the modified adhesive against Streptococcus mutans and the bond strength. Single Bond 2 was used as a negative control, and nisin was incorporated at 1%, 3%, and 5% (w/v). The antibacterial activity against S. mutans was evaluated using the film contact test, the agar diffusion test, XTT assays and confocal laser scanning microscopy (CLSM). The microtensile bond strength (μTBS) of the modified dental adhesive was also evaluated...
October 9, 2017: Peptides
https://www.readbyqxmd.com/read/29024375/artificial-urine-and-fbs-supplemented-media-in-cytocompatibility-assays-for-plga-peg-based-intravesical-devices-using-the-urothelium-cell-line-urotsa
#11
P Arndt, N D Leistner, S Neuss, D Kaltbeitzel, G A Brook, J Grosse
European and German directives for approval of new medical devices require tests for cytotoxicity in relevant media, since urine can influence cytotoxicity of biodegradable devices. The aim of this study was to determine the long-term cytotoxicity of PLGA-b-mPEG (PLGA-PEG) polymer carriers and artificial urine (AU) to human UROtsa cells. Benign urothelial UROtsa cells were incubated in fetal bovine serum-containing RPMI 1640 medium supplemented with a range of concentrations of AU for 24 h and 7 days. Cell viability was determined by the XTT assay and by live/dead staining...
October 10, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29019553/biodentinetm-is-cytocompatible-with-human-primary-osteoblasts
#12
Miriam Zaccaro Scelza, Joyce Costa Nascimento, Licinio Esmeraldo da Silva, Vinícius Shott Gameiro, Gustavo DE Deus, Gutemberg Alves
Calcium silicate-based materials have been widely studied due to their resemblance to, and similar applicability of, mineral trioxide aggregate (MTA). Among these, Biodentine™ (BD) was specifically designed as a "dentin replacement" material for applications such as root perforations, apexification, treatment of resorptive lesions, and as a retrograde filling material. The present study aimed to assess the in vitro response of human primary osteoblasts to BD using MTA AngelusTM as a reference material, by simultaneously analyzing three different cell viability parameters, namely mitochondrial activity, membrane integrity, and cell density...
September 28, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28992253/in-vitro-antifungal-susceptibility-patterns-of-planktonic-and-sessile-candida-kefyr-clinical-isolates
#13
Fruzsina Nagy, Aliz Bozó, Zoltán Tóth, Lajos Daróczi, László Majoros, Renátó Kovács
The activity of fluconazole, amphotericin B, caspofungin and micafungin was determined using XTT-based fungal damage assays against planktonic cells, early and mature biofilms of Candida kefyr. Median MICs of planktonic cells were 0.25 mg/l, 0.25 mg/l, 0.5 mg/l, and 0.06 mg/l for fluconazole, amphotericin B, caspofungin, and micafungin, respectively. Fluconazole showed at least 50% fungal damage at ≥4 mg/l (51.5% ± 6.63% to 78.38% ± 1.44%) and at ≥128 mg/l (57.88% ± 9.2% to 67.25% ± 9...
August 4, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28988900/biofilm-forming-capacity-of-blood-borne-candida-albicans-strains-and-effects-of-antifungal-agents
#14
Hanni Turan, Müge Demirbilek
Infections related to Candida albicans biofilms and subsequent antifungal resistance have become more common with the increased use of indwelling medical devices. Regimens for preventing fungal biofilm formation are needed, particularly in high-risk patients. In this study, we investigated the biofilm formation rate of multiple strains of Candida albicans (n=162 clinical isolates), their antifungal susceptibility patterns, and the efficacy of certain antifungals for preventing biofilm formation. Biofilm formation was graded using a modified Christensen's 96-well plate method...
October 5, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/28971316/resveratrol-pterostilbene-and-baicalein-plant-derived-anti-biofilm-agents
#15
Irena Kolouchová, Olga Maťátková, Martina Paldrychová, Zdeněk Kodeš, Eva Kvasničková, Karel Sigler, Alena Čejková, Jan Šmidrkal, Kateřina Demnerová, Jan Masák
Microbial adhesion to surfaces and the subsequent biofilm formation may result in contamination in food industry and in healthcare-associated infections and may significantly affect postoperative care. Some plants produce substances with antioxidant and antimicrobial properties that are able to inhibit the growth of food-borne pathogens. The aim of our study was to evaluate antimicrobial and anti-biofilm effect of baicalein, resveratrol, and pterostilbene on Candida albicans, Staphylococcus epidermidis, Pseudomonas aeruginosa, and Escherichia coli...
October 2, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28955316/anti-biofilm-activities-from-bergenia-crassifolia-leaves-against-streptococcus-mutans
#16
Yucui Liu, Yanjie Xu, Qiuhang Song, Fei Wang, Luguo Sun, Lei Liu, Xiaoguang Yang, Jingwen Yi, Yongli Bao, Haifeng Ma, Honglan Huang, Chunlei Yu, Yanxin Huang, Yin Wu, Yuxin Li
Streptococcus mutans has been reported as a primary cariogenic pathogen associated with dental caries. The bacteria can produce glucosyltransferases (Gtfs) to synthesize extracellular polysaccharides (EPSs) that are known as virulence factors for adherence and formation of biofilms. Therefore, an ideal inhibitor for dental caries is one that can inhibit planktonic bacteria growth and prevent biofilm formation. Bergenia crassifolia (L.), widely used as a folk medicine and tea beverage, has been reported to have a variety of bioactivities...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28950197/preparation-and-cytotoxicity-of-chitosan-based-hydrogels-modified-with-silver-nanoparticles
#17
Bożena Tyliszczak, Anna Drabczyk, Sonia Kudłacik-Kramarczyk, Katarzyna Bialik-Wąs, Regina Kijkowska, Agnieszka Sobczak-Kupiec
Chitosan based hydrogels are commonly applied in various fields of medicine and pharmacy. Modification of hydrogel polymers using nanosilver particles may result in formation of materials with enhanced antibacterial properties. In this article synthesis of hydrogel materials based on chitosan and modified with silver nanoparticles is presented. First, preparation and characterization of silver nanoparticles using UV-vis spectroscopy has been shown. Hydrogels modified with nanosilver particles were subjected to the measurements of swelling ability and in vitro tests in distilled water and Simulated Body Fluid (SBF), respectively...
September 20, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28943850/withanolide-d-exhibits-similar-cytostatic-effect-in-drug-resistant-and-drug-sensitive-multiple-myeloma-cells
#18
Mark E Issa, E M K Wijeratne, A A L Gunatilaka, Muriel Cuendet
In spite of recent therapeutic advances, multiple myeloma (MM) remains a malignancy with very low curability. This has been partly attributed to the existence of a drug-resistant subpopulation known as cancer stem cells (CSCs). MM-CSCs are equipped with the necessary tools that render them highly resistant to virtually all conventional therapies. In this study, the growth inhibitory effects of withanolide D (WND), a steroidal lactone isolated from Withania somnifera, on drug-sensitive tumoral plasma cells and drug-resistant MM cells have been investigated...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28928437/as1411-aptamer-anionic-linear-globular-dendrimer-g2-iohexol-selective-nano-theranostics
#19
Pardis Mohammadzadeh, Reza Ahangari Cohan, Seyedeh Masoumeh Ghoreishi, Ahmad Bitarafan-Rajabi, Mehdi Shafiee Ardestani
Molecular theranostics is of the utmost interest for diagnosis as well as treatment of different malignancies. In the present study, anionic linear globular dendrimer G2 is employed as a suitable carrier for delivery and AS1411 aptamer is exploited as the targeting agent to carry Iohexol specifically to the human breast cancer cells (MCF-7). Dendrimer G2 was prepared and conjugation of dendrimer and aptamer was carried out thereafter. Based on the data yielded by AFM, morphology of smooth and spherical non-targeted dendrimer changed to the rough aspherical shape when it conjugated...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28925481/functional-impact-of-galectin-3-and-trail-expression-in-breast-cancer-cells
#20
X-H Liu, C-X Deng, P-C Hu, Y Wang, Y-H Dong
OBJECTIVE: To examine the expression of Galectin-3 and TRAIL in breast cancer tissue and their effects on the proliferation and apoptosis of breast cancer cells. PATIENTS AND METHODS: Breast cancer and normal adjacent tissue were collected from 120 patients pathologically diagnosed with breast cancer who underwent a modified radical mastectomy. SP method of immunohistochemistry was used to detect the expression levels of Galectin-3 and TRAIL in breast cancer tissues and normal adjacent tissues...
August 2017: European Review for Medical and Pharmacological Sciences
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