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https://www.readbyqxmd.com/read/27910791/effects-of-ethyl-acetate-extracts-from-the-polycephalomyces-nipponicus-isolate-cod-mk1201-ascomycetes-against-human-pathogenic-bacteria-and-a-breast-cancer-cell-line
#1
Kusavadee Sangdee, Prapairat Seephonkai, Benjaporn Buranrat, Nilawan Surapong, Aphidech Sangdee
This study aimed to identify a suitable organic solvent for extracting bioactive compounds from Polycephalomyces nipponicus and to evaluate the antibacterial and anticancer activities of the extracts obtained. Only extracts obtained with ethyl acetate exhibited antibacterial activity, so ethyl acetate was chosen for large-scale extraction. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against Gram-positive and Gram-negative human pathogenic bacteria of the 3 ethyl acetate-derived extracts-ethyl acetate extract from P...
2016: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/27907002/chemical-composition-an-antioxidant-cytotoxic-and-microbiological-activity-of-the-essential-oil-from-the-leaves-of-aeollanthus-suaveolens-mart-ex-spreng
#2
Rosany Lopes Martins, Ranggel Carvalho Simões, Érica de Menezes Rabelo, Ana Luzia Ferreira Farias, Alex Bruno Lobato Rodrigues, Ryan da Silva Ramos, João Batista Fernandes, Lourivaldo da Silva Santos, Sheylla Susan Moreira da Silva de Almeida
Aeollanthus suaveolens species popularly known as catinga de mulata belongs to the Lamiaceae family. In the Amazon region, it is used in folk medicine for the treatment of gastritis, convulsions of epileptic origin, stomach pain and diarrhea in the form of tea and juice. Essential oils have analgesic, anti-inflammatory, and antimicrobial activity. This study evaluated the chemical composition of the A. suaveolens essential oil, and its cytotoxic, antimicrobial and antioxidant activity on Artemia salina Leach...
2016: PloS One
https://www.readbyqxmd.com/read/27901206/antimicrobial-activity-of-different-disinfectants-against-cariogenic-microorganisms
#3
Esra Uzer Celik, Ayse Tugce Tunac, Mustafa Ates, Bilge Hakan Sen
The aim of this study was to assess the in vitro antimicrobial effects of chlorhexidine digluconate (CHX), polyhexamethylene biguanide (PHBM), and octenidine dihydrochloride (OCT) on cariogenic microorganisms by using their minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). CHX, PHBM, and OCT were diluted in distilled water to the final test concentrations. Using the in-tube dilution method, Streptococcus mutans, Lactobacillus acidophilus, Lactobacillus rhamnosus, and Actinomyces viscosus were cultivated on blood agar and Mueller-Hinton broth (MHB) at 37°C for 48 h...
November 28, 2016: Brazilian Oral Research
https://www.readbyqxmd.com/read/27896496/dalbavancin-reduces-biofilms-of-methicillin-resistant-staphylococcus-aureus-mrsa-and-methicillin-resistant-staphylococcus-epidermidis-mrse
#4
D Knafl, S Tobudic, S C Cheng, D R Bellamy, F Thalhammer
Activity of dalbavancin against methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-resistant Staphylococcus epidermidis (MRSE) in biofilm was investigated and the microbicidal biofilm concentrations (MBC) were determined. Biofilms obtained from ten MRSA and ten MRSE bloodstream isolates, collected from patients in the General Hospital of Vienna between 2012 and 2015, were incubated with dalbavancin in trypticase soy broth (TSB) in serial dilution from 0.0625 mg/l to 256 mg/l using a microtiter plate biofilm model...
November 28, 2016: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/27895632/predicting-resistance-by-mutagenesis-lessons-from-45-years-of-mbc-resistance
#5
Nichola J Hawkins, Bart A Fraaije
When a new fungicide class is introduced, it is useful to anticipate the resistance risk in advance, attempting to predict both risk level and potential mechanisms. One tool for the prediction of resistance risk is laboratory selection for resistance, with the mutational supply increased through UV or chemical mutagenesis. This enables resistance to emerge more rapidly than in the field, but may produce mutations that would not emerge under field conditions. The methyl benzimidazole carbamates (MBCs) were the first systemic single-site agricultural fungicides, and the first fungicides affected by rapid evolution of target-site resistance...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27891615/a-large-potentiation-effect-of-serum-on-the-in%C3%A2-vitro-potency-of-tulathromycin-against-mannheimia-haemolytica-and-pasteurella-multocida
#6
P Lees, J Illambas, T J Potter, L Pelligand, A Rycroft, P-L Toutain
The antimicrobial properties of tulathromycin were investigated for M. haemolytica and P. multocida. Three in vitro indices of antimicrobial activity, minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC) and time-kill curves, were established for six isolates of each organism. Each index was measured in two growth media: Mueller-Hinton broth (MHB) and calf serum. It was shown that MICs and MBCs were markedly lower in serum than in MHB. MHB:serum ratios for MIC were 47:1 (M. haemolytica) and 53:1 (P...
November 27, 2016: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/27891113/the-impact-of-silver-nanoparticles-produced-by-bacillus-pumilus-as-antimicrobial-and-nematicide
#7
Wael M Mahmoud, Tamer S Abdelmoneim, Ahmed M Elazzazy
This study evaluates the potential application of silver nanoparticles (AgNPs) as antimicrobial or nematicidal agents produced by the extremophile Bacillus pumilus, which was isolated from the alkaline Wadi El-Natrun Lake in Egypt. The AgNPs were characterized by ultraviolet-visible absorption spectroscopy, transmission electron microscopy, and energy dispersive x-ray spectroscopy. The size of AgNPs formed ranged from 20.12 to 29.48 nm. Panagrellus redivivus was exposed to different concentrations (0, 50, 100, 150, and 200 μg/mL) of AgNPs in a 5 mL nematode suspension (1 × 10(3) mL(-1))...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27890418/comparative-in-vitro-activity-of-oritavancin-and-other-agents-against-methicillin-susceptible-and-methicillin-resistant-staphylococcus-aureus
#8
Debora Sweeney, Dean L Shinabarger, Francis F Arhin, Adam Belley, Greg Moeck, Chris M Pillar
Methicillin-resistant Staphylococcus aureus (MRSA) infections constitute a threat to the public health due to their prevalence and associated mortality and morbidity. Several agents have been recently approved to treat MRSA skin infections including lipoglycopeptides (dalbavancin, oritavancin, and telavancin), ceftaroline, and tedizolid. This study compared the MIC, minimum bactericidal concentration (MBC), and time-kill of these agents alongside daptomycin, linezolid, and vancomycin against MRSA (n=15); meropenem, cefazolin, and nafcillin were also included against methicillin-susceptible S...
November 12, 2016: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/27888048/breaking-the-resistance-of-escherichia-coli-antimicrobial-activity-of-berberis-lycium-royle
#9
Tauseef Ahmad Malik, Azra N Kamili, M Z Chishti, Shazia Ahad, Mudasir A Tantry, P R Hussain, R K Johri
The antimicrobial activity of root bark of Berberis lycium and its principal component berberine was tested against a panel of microbial strains using agar well diffusion test and further analyzed using micro-broth dilution method. Preliminary analysis, on the basis of zone of Inhibition (ZOI) showed that the methanolic extract of B. lycium was highly effective against Escherichia coli (ZOI 41 ± 1 mm). Among the bacterial strains E. coli was found to be most susceptible and among fungi Candida albicans was the most susceptible for berberine as well as the crude methanolic extract of the plant...
November 23, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/27886589/esr1-mutations-moving-towards-guiding-treatment-decision-making-in-metastatic-breast-cancer-patients
#10
REVIEW
Lindsay Angus, Nick Beije, Agnes Jager, John W M Martens, Stefan Sleijfer
Mutations in the gene coding for the estrogen receptor (ER), ESR1, have been associated with acquired endocrine resistance in patients with ER-positive metastatic breast cancer (MBC). Functional studies revealed that these ESR1 mutations lead to constitutive activity of the ER, meaning that the receptor is active in absence of its ligand estrogen, conferring resistance against several endocrine agents. While recent clinical studies reported that the occurrence of ESR1 mutations is rare in primary breast cancer tumors, these mutations are more frequently observed in metastatic tissue and circulating cell-free DNA of MBC patients pretreated with endocrine therapy...
November 10, 2016: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/27883943/targeted-therapy-for-breast-cancer-and-molecular-mechanisms-of-resistance-to-treatment
#11
REVIEW
Guowei Gu, Derek Dustin, Suzanne Aw Fuqua
In recent years, clinical trials investigating new drugs and therapeutic combinations have led to promising advances in breast cancer therapy. Subtyping breast cancers into hormone receptor (HR) positive, epidermal growth factor receptor (HER2) positive, and triple negative breast cancer (TNBC) is currently the basis of diagnosing and treating this disease. In addition to endocrine and HER2-targeted therapies in their respective subtypes, evidence from recent preclinical studies have shown several targetable pathways that overcome resistance in the clinical setting...
November 21, 2016: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/27877160/antibacterial-potential-of-jatropha-curcas-synthesized-silver-nanoparticles-against-food-borne-pathogens
#12
Nitin Chauhan, Amit K Tyagi, Pushpendar Kumar, Anushree Malik
The aqueous leaf extract of Jatropha curcas was used for the synthesis of silver nanoparticles (Jc-AgNps) which were further evaluated for its antibacterial potential against food borne pathogens. J. curcas leaf extract could synthesize stable silver nanoparticles (Zeta potential: -23.4 mV) with absorption band at 430 nm. Fourier transform infrared spectroscopy indicated various biological compounds responsible for capping and stabilizing Jc-AgNps in suspension, while the presence of silver was authenticated by scanning electron microscopy (SEM) equipped with energy-dispersive X-ray...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27876131/chemosensitization-role-of-fulvestrant-in-combination-with-chemotherapy-in-postmenopausal-hormone-receptor-positive-and-human-epidermal-growth-factor-negative-metastatic-breast-cancer
#13
Qing-Qing Luo, Vishnu Prasad Adhikari, Chun-Xia Zhao, He Wu, Wei Dai, Xin Li, Yu-Tuan Wu, Kai-Nan Wu, Ling-Quan Kong
In metastatic breast cancer (MBC), hormone receptor positive (HR+), human epidermal growth factor negative (HER2-) subtype accounts for the majority. With various new modalities available to prolong life span in this group of patients, the effect is distant from optimum. Prevalent strategy of treating postmenopausal HR+ HER2- MBC is application of chemotherapy (CT) after progression of disease on endocrine therapy (ET) of several lines. Generally, ET targets HR+ ingredients and CT works better with HR- tumor cells...
December 2016: Medical Hypotheses
https://www.readbyqxmd.com/read/27870562/monitoring-of-serum-dna-methylation-as-an-early-independent-marker-of-response-and-survival-in-metastatic-breast-cancer-tbcrc-005-prospective-biomarker-study
#14
Kala Visvanathan, MaryJo S Fackler, Zhe Zhang, Zoila A Lopez-Bujanda, Stacie C Jeter, Lori J Sokoll, Elizabeth Garrett-Mayer, Leslie M Cope, Christopher B Umbricht, David M Euhus, Andres Forero, Anna M Storniolo, Rita Nanda, Nancy U Lin, Lisa A Carey, James N Ingle, Saraswati Sukumar, Antonio C Wolff
Purpose Epigenetic alterations measured in blood may help guide breast cancer treatment. The multisite prospective study TBCRC 005 was conducted to examine the ability of a novel panel of cell-free DNA methylation markers to predict survival outcomes in metastatic breast cancer (MBC) using a new quantitative multiplex assay (cMethDNA). Patients and Methods Ten genes were tested in duplicate serum samples from 141 women at baseline, at week 4, and at first restaging. A cumulative methylation index (CMI) was generated on the basis of six of the 10 genes tested...
November 21, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/27870138/promise-of-combining-antifungal-agents-in-denture-adhesives-to-fight-candida-species-infections
#15
Jorge L Garaicoa, Carol L Fischer, Amber M Bates, Julie Holloway, Gustavo Avila-Ortiz, Janet M Guthmiller, Georgia K Johnson, Clark Stanford, Kim A Brogden
PURPOSE: Several complications may arise in patients wearing complete prosthetic appliances, including denture-associated infections and mucosal stomatitis due to Candida species. This study evaluated the activity of anti-Candida agents in denture adhesive and the cytotoxicities of these preparations for primary human gingival epithelial (GE) keratinocytes. MATERIALS AND METHODS: The anti-Candida activities of antimicrobial peptides, antimicrobial lipids, and antifungal agents against C...
November 21, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/27865524/exposure-to-uv-filters-during-summer-and-winter-in-danish-kindergarten-children
#16
Marianna Krause, Anna-Maria Andersson, Niels E Skakkebaek, Hanne Frederiksen
BACKGROUND: Ultra violet (UV) filters with known or suspected endocrine disrupting properties are widely used in sunscreens and other personal care products, clothing, food packaging and many other consumer products. Danish kindergarten children have sunscreens applied daily during summer to prevent skin burns. OBJECTIVES: To estimate the assumed contribution of sunscreens to the total exposure to UV filters, we measured the urinary excretion of UV filters during summer and winter in kindergarten children...
November 16, 2016: Environment International
https://www.readbyqxmd.com/read/27861874/a-real-world-multicentre-retrospective-study-of-paclitaxel-bevacizumab-and-maintenance-therapy-as-first-line-for-her2-negative-metastatic-breast-cancer
#17
Teresa Gamucci, Lucia Mentuccia, Clara Natoli, Isabella Sperduti, Alessandra Cassano, Andrea Michelotti, Luigi Di Lauro, Domenico Sergi, Alessandra Fabi, Maria G Sarobba, Paolo Marchetti, Maddalena Barba, Emanuela Magnolfi, Marcello Maugeri-Saccà, Ernesto Rossi, Valentina Sini, Antonino Grassadonia, Domenica Pellegrini, Antonino Astone, Cecilia Nisticò, Franco Angelini, Angela Vaccaro, Arianna Pellegrino, Claudia De Angelis, Michela Palleschi, Luca Moscetti, Ilaria Bertolini, Simonetta Buglioni, Antonio Giordano, Laura Pizzuti, Patrizia Vici
Bevacizumab in combination with taxanes in HER2-negative metastatic breast cancer (MBC) patients has shown improved progression-free survival (PFS), despite the lack of clear overall survival (OS) benefit. We performed a retrospective analysis to evaluate the impact of paclitaxel-bevacizumab and of maintenance therapy with bevacizumab (BM) and endocrine therapy (ET) in the real-world practice. We identified 314 HER2-negative MBC patients treated in 12 cancer centers. Overall, the median PFS and OS were 14 and 40 months, respectively...
November 11, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27853985/a-definition-for-aggressive-disease-in-patients-with-her-2-negative-metastatic-breast-cancer-an-expert-consensus-of-the-spanish-society-of-medical-oncology-seom
#18
REVIEW
A González, A Lluch, E Aba, J Albanell, A Antón, I Álvarez, F Ayala, A Barnadas, L Calvo, E Ciruelos, J Cortés, J de la Haba, J M López-Vega, E Martínez, M Muñoz, I Peláez, A Redondo, Á Rodríguez, C A Rodríguez, A Ruíz, A Llombart
PURPOSE: To converge on an expert opinion to define aggressive disease in patients with HER2-negative mBC using a modified Delphi methodology. METHODS: A panel of 21 breast cancer experts from the Spanish Society of Medical Oncology agreed upon a survey which comprised 47 questions that were grouped into three sections: relevance for defining aggressive disease, aggressive disease criteria and therapeutic goals. Answers were rated using a 9-point Likert scale of relevance or agreement...
November 16, 2016: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/27847222/use-of-maintenance-endocrine-therapy-after-chemotherapy-in-metastatic-breast-cancer
#19
REVIEW
S Sutherland, D Miles, A Makris
BACKGROUND: For women with oestrogen receptor+ metastatic breast cancer (MBC), the options for systemic treatment include endocrine therapy (ET) and chemotherapy. For women whose disease is also HER2+, anti-HER2 therapies are also routinely used either with chemotherapy or less commonly with ET. Where chemotherapy is used as initial therapy, treatment is often discontinued due to cumulative toxicity in the absence of disease progression. In this setting, there is the option of introducing ET with the aim of prolonging response and delaying relapse...
November 12, 2016: European Journal of Cancer
https://www.readbyqxmd.com/read/27843605/recent-developments-and-translational-aspects-in-targeted-therapy-for-metastatic-breast-cancer
#20
REVIEW
Maximilian Marhold, Rupert Bartsch, Christoph Zielinski
Biologically distinct subtypes of metastatic breast cancer (MBC) have been defined by multiple efforts in recent years, showing broad heterogeneity at the molecular level of disease. Throughout this endeavour, oncogenic drivers within MBC were identified as potential therapeutic targets. With recent results from clinical trials targeting these well-known cancer-promoting pathways, this review is trying to elucidate as well as summarise current new therapeutic aspects in MBC and shed light on translational aspects within this entity...
2016: ESMO Open
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