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https://www.readbyqxmd.com/read/28929967/-results-of-a-multicenter-study-investigating-plasmid-mediated-colistin-resistance-genes-mcr-1-and-mcr-2-in-clinical-enterobacteriaceae-%C3%A4-solates-from-turkey
#1
Ayşe Nur Sarı, Serap Süzük, Onur Karatuna, Dilara Öğünç, Ayşe Esra Karakoç, Zeynep Çizmeci, Hikmet Eda Alışkan, Füsun Cömert, Mustafa Zahir Bakıcı, Nezahat Akpolat, Fatma Feriha Çilli, Yasemin Zer, Aysel Karataş, Bahar Akgün Karapınar, Gülçin Bayramoğlu, Melda Özdamar, Fatma Kalem, Nuran Delialioğlu, Elif Aktaş, Nisel Yılmaz, Şaban Gürcan, Zeynep Gülay
Colistin is a polymyxin antibiotic which is considered as one of the last line agents against infections due to multidrug resistant or carbapenem resistant gram-negative pathogens. Colistin resistance is associated with chromosomal alterations which can usually cause mutations in genes coding specific two component regulator systems. The first plasmid-mediated colistin resistance gene, mcr-1 was described in Escherichia coli and Klebsiella pneumoniae isolates in December 2015 and followed by another plasmid-mediated colistin resistance gene mcr-2 in 2016...
July 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28922929/express-edge-preserving-image-smoothing-constraint-in-mcr-als-of-hyperspectral-data
#2
Siewert Hugelier, Raffaele Vitale, Cyril Ruckebusch
No abstract text is available yet for this article.
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28921842/anchorquery-rapid-online-virtual-screening-for-small-molecule-protein-protein-interaction-inhibitors
#3
David R Koes, Alexander Dömling, Carlos J Camacho
AnchorQuery ( http://anchorquery.csb.pitt.edu) is a web application for rational structure-based design of protein-protein interaction (PPI) inhibitors. A specialized variant of pharmacophore search is used to rapidly screen libraries consisting of more than 31 million synthesizable compounds biased by design to preferentially target PPIs. Every library compound is accessible through one-step multi-component reaction (MCR) chemistry and contains an anchor motif that is bioisosteric to an amino acid residue...
September 16, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28919348/prevalence-of-colistin-resistance-in-clinical-isolates-of-enterobacteriaceae-a-four-year-cross-sectional-study
#4
Núria Prim, Miquel Turbau, Alba Rivera, Judith Rodríguez-Navarro, Pere Coll, Beatriz Mirelis
OBJECTIVES: The objectives were to determine the prevalence of colistin resistance in clinical isolates of Enterobacteriaceae, and to gain knowledge on the epidemiological and clinical features of the patients. METHODS: All colistin-resistant Enterobacteriaceae consecutively isolated from clinical samples in our institution from 2012 to 2015, were included in this cross-sectional study. Intrinsic-resistant species were excluded. Minimum inhibitory concentration was performed by gradient diffusion...
September 14, 2017: Journal of Infection
https://www.readbyqxmd.com/read/28919044/susceptibility-of-colistin-resistant-pathogens-to-predatory-bacteria
#5
Sonal Dharani, Dong Hyun Kim, Robert M Q Shanks, Yohei Doi, Daniel E Kadouri
The increase in multidrug-resistant Gram-negative bacterial infections has forced the reintroduction of antibiotics such as colistin. However, the spread of plasmid-borne mcr-1 colistin resistance genes have moved us closer to an era of untreatable Gram-negative infections. To evaluate whether predatory bacteria could be used as a potential therapeutic to treat this upcoming threat, the ability of Bdellovibrio bacteriovorus and Micavibrio aeruginosavorus to prey on several clinically relevant mcr-1-positive, colistin-resistant isolates was evaluated...
September 15, 2017: Research in Microbiology
https://www.readbyqxmd.com/read/28915282/factors-affecting-the-rheological-measurement-of-hyaluronic-acid-gel-fillers
#6
Z Paul Lorenc, Åke Öhrlund, Katarina Edsman
BACKGROUND: With the number of available dermal fillers increasing, so is the demand for scientifically based comparisons, often with rheological properties in focus. Since analytical results are always influenced by instrument settings, consensus on settings is essential to make comparison of results from different investigators more useful. OBJECTIVE: Preferred measurement settings for rheological analysis of hyaluronic acid (HA) fillers are suggested, and the reasoning behind the choices is presented by demonstrating the effect of different measurement settings on select commercial HA fillers...
September 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28912328/complete-genome-sequence-of-salmonella-enterica-subsp-enterica-serovar-paratyphi-b-sequence-type-28-harboring-mcr-1
#7
Maria Borowiak, Jens A Hammerl, Jennie Fischer, Istvan Szabo, Burkhard Malorny
In 2015, plasmid-mediated colistin resistance was reported to be caused by a mobilized phosphoethanolamine transferase gene (mcr-1) in Enterobacteriaceae Here, we announce the complete genome sequence of the earliest d-tartrate-fermenting Salmonella enterica subsp. enterica serovar Paratyphi B isolate harboring mcr-1 from the collection of the German National Reference Laboratory for Salmonella.
September 14, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28910533/a-one-pot-mcr-oxidation-approach-towards-indole-fused-heteroacenes
#8
P V Santhini, Akhil Krishnan R, Sheba Ann Babu, Betna Shamlin Simethy, Gourab Das, Vakayil K Praveen, Sunil Varughese, Jubi John
A straightforward synthetic route towards indole-fused heteroacenes was developed. The strategy comprises of a one-pot process starting with a multicomponent reaction of cyclohexanone, primary amine and N-tosyl-3-nitroindole followed by an oxidation step. The one-pot approach was found to be general affording both symmetric and non-symmetric indolo[3,2-b]indoles in good yields. The strategy was also utilized for accessing 5-ring fused benzo[g]indolo[3,2-b]indole. We could extend the methodology for the synthesis of benzothieno[3,2-b]indoles starting from 3-nitro-benzothiophene...
September 14, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28910166/prevalence-antimicrobial-resistance-and-relatedness-of-salmonella-isolated-from-chickens-and-pigs-on-farms-abattoirs-and-markets-in-sichuan-province-china
#9
Suzhen Ma, Changwei Lei, Linghan Kong, Wei Jiang, Bihui Liu, Shuai Men, Yanxian Yang, Guangyang Cheng, Yanpeng Chen, Hongning Wang
This study aims at investigating the distribution, antimicrobial resistance, and genetic relationship of Salmonella isolated from 18 farms, their downstream abattoirs, and markets of chickens and pigs in Sichuan province, China. A total of 193 Salmonella isolates were identified from 693 samples with an isolation rate of 26.27% (88/335) in chickens and 29.33% (105/358) in pigs. Salmonella was isolated more frequently in abattoirs and markets than from farms. Serotypes were determined according to the White-Kauffmann-Le Minor scheme and 16 different serotypes were identified, with Derby being the most common, followed by Typhimurium and Meleagridis...
September 14, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28904264/zoonotic-potential-and-antibiotic-resistance-of-escherichia-coli-in-neonatal-calves-in-uruguay
#10
Ana Umpiérrez, Inés Bado, Martín Oliver, Sofía Acquistapace, Analía Etcheverría, Nora Lía Padola, Rafael Vignoli, Pablo Zunino
Escherichia coli is one of the main etiological agents of neonatal calf diarrhea (NCD). The objective of this study was to assess the presence of virulence genes, genetic diversity, and antibiotic resistance mechanisms in E. coli associated with NCD in Uruguay. PCR was used to assess the presence of intimin, Shiga-like toxin, and stable and labile enterotoxin genes. Resistance to fluoroquinolones and oxyimino-cephalosporins was estimated on Müller-Hinton agar plates. Further antibiotic disc-diffusion tests were performed to assess bacterial multi-resistance...
September 12, 2017: Microbes and Environments
https://www.readbyqxmd.com/read/28903359/expression-of-sialyl-tn-sugar-antigen-in-bladder-cancer-cells-affects-response-to-bacillus-calmette-gu%C3%A3-rin-bcg-and-to-oxidative-damage
#11
Paulo F Severino, Mariana Silva, Mylene Carrascal, Nadia Malagolini, Mariella Chiricolo, Giulia Venturi, Annalisa Astolfi, Mariangela Catera, Paula A Videira, Fabio Dall'Olio
The sialyl-Tn (sTn) antigen is an O-linked carbohydrate chain aberrantly expressed in bladder cancer (BC), whose biosynthesis is mainly controlled by the sialyltransferase ST6GALNAC1. Treatment with Bacillus Calmette-Guérin (BCG) is the most effective adjuvant immunotherapy for superficial BC but one third of the patients fail to respond. A poorly understood correlation between the expression of sTn and BC patient's response to BCG was previously observed. By analyzing tumor tissues, we showed that patients with high ST6GALNAC1 and IL-6 mRNA expression were BCG responders...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28903169/-a-rare-mechanism-of-resistance-to-colistin-in-escherichia-coli-isolated-from-raw-poultry-meat
#12
Renáta Karpíšková, Ivana Koláčková, Tereza Gelbíčová, Marie Zobaníková
Plasmid-mediated resistance to colistin is a recently described phenomenon. The study reports this new type of colistin resistance in food isolates of Escherichia coli in the Czech Republic. Strains with phenotypically determined colistin resistance were studied for presence of the mcr-1 and mcr-2 genes. A positive finding of E. coli harboring the mcr-1 gene was confirmed in a sample of raw minced turkey meat imported from Poland. Two different strains of E. coli carrying the mcr-1 gene were detected in the same sample...
June 2017: Klinická Mikrobiologie a Infekc̆ní Lékar̆ství
https://www.readbyqxmd.com/read/28899662/baseline-association-of-motoric-cognitive-risk-syndrome-with-sustained-attention-memory-and-global-cognition
#13
Fiachra J Maguire, Isabelle Killane, Andrew P Creagh, Orna Donoghue, Rose Anne Kenny, Richard B Reilly
OBJECTIVES: Slow gait has been shown to be a good predictor of declining cognitive function in healthy older adults. Motoric cognitive risk (MCR) syndrome is a new construct incorporating slow gait and subjective cognitive complaints in individuals without dementia who have preserved activities of daily living. This analysis investigated the prevalence of MCR and factors associated with MCR in a nationally representative population. In addition, cross-sectional associations between MCR and cognitive domains, an relationship yet to be fully elucidated in literature, was investigated...
September 9, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28893788/genomic-and-molecular-characterization-of-clinical-isolates-of-enterobacteriaceae-harboring-mcr-1-in-colombia-2002-2016
#14
Sandra Yamile Saavedra, Lorena Diaz, Magdalena Wiesner, Adriana Correa, Stefany Alejandra Arévalo, Jinnethe Reyes, Andrea Melissa Hidalgo, Elsa de la Cadena, Marcela Perenguez, Lucy Angeline Montaño, Javier Ardila, Rafael Ríos, María Victoria Ovalle, Paula Díaz, Paola Porras, Maria V Villegas, Cesar A Arias, Mauricio Beltrán, Carolina Duarte
Polymyxins are last resort antimicrobial agents used to treat infections caused by carbapenem-resistant Enterobacteriaceae Due to the worldwide dissemination of polymyxin resistance in animal and human isolates, we aimed to characterize polymyxin resistance associated with the presence of mcr-1 in Enterobacteriaceae and nonfermenter Gram-negative bacilli, in isolates collected retrospectively in Colombia from 2002 to 2016. A total of 5,887 Gram-negative clinical isolates were studied and 513 were found to be resistant to the polymyxins...
September 11, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28888694/analyzing-the-effects-of-co-expression-of-chick-gallus-gallus-melanocortin-receptors-with-either-chick-mrap1-or-mrap2-in-cho-cells-on-sensitivity-to-acth-1-24-or-acth-1-13-nh2-implications-for-the-avian-hpa-axis-and-avian-melanocortin-circuits-in-the-hypothalamus
#15
Alexa L Thomas, Fumihiko Maekawa, Takaharu Kawashima, Hirotaka Sakamoto, Tatsuya Sakamoto, Perry Davis, Robert M Dores
In order to better understand the roles that melanocortin receptors (cMCRs) and melanocortin-2 receptor accessory proteins (cMRAP1 and cMRAP2) play in the HPA axis and hypothalamus, adrenal gland and hypothalamus mRNA from 1day-old white leghorn chicks (Gallus gallus), were analyzed by real-time PCR. mRNA was also made for kidney, ovary, and liver. Mrap1 mRNA could be detected in adrenal tissue, but not in any of the other tissues, and mrap2 mRNA was also detected in the adrenal gland. Finally, all five melanocortin receptors mRNAs could be detected in the adrenal gland; mc2r and mc5r mRNAs were the most abundant...
September 6, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28887199/temporal-evolution-of-polymyxin-b-resistant-klebsiella-pneumoniae-clones-recovered-from-blood-cultures-in-a-teaching-hospital-during-a-7-year-period
#16
Graziela Braun, Rodrigo Cayô, Adriana Pereira Matos, Juliane de Mello Fonseca, Ana Cristina Gales
The polymyxins have become one of the last resorts to treat serious infections caused by KPC-2-producing Klebsiella pneumoniae worldwide. However, the increase of polymyxin consumption has favored the emergence of resistance to these compounds. In this study we observed an increase in the polymyxin B resistance rates from 0 to 30.6% among 224 K. pneumoniae isolates recovered from blood cultures between 2009 and 2015. Only gentamicin, tigecycline and fosfomycin remained active against the polymyxin B-resistant K...
September 5, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28880150/post-translational-thioamidation-of-methyl-coenzyme-m-reductase-a-key-enzyme-in-methanogenic-and-methanotrophic-archaea
#17
Dipti D Nayak, Nilkamal Mahanta, Douglas A Mitchell, William W Metcalf
Methyl-coenzyme M reductase (MCR), found in strictly anaerobic methanogenic and methanotrophic archaea, catalyzes the reversible production and consumption of the potent greenhouse gas methane. The α subunit of MCR (McrA) contains several unusual post-translational modifications, including a rare thioamidation of glycine. Based on the presumed function of homologous genes involved in the biosynthesis of thioviridamide, a thioamide-containing natural product, we hypothesized that the archaeal tfuA and ycaO genes would be responsible for post-translational installation of thioglycine into McrA...
September 7, 2017: ELife
https://www.readbyqxmd.com/read/28878890/key-features-of-mcr-1-bearing-plasmids-from-escherichia-coli-isolated-from-humans-and-food
#18
Katrin Zurfluh, Magdalena Nüesch-Inderbinen, Jochen Klumpp, Laurent Poirel, Patrice Nordmann, Roger Stephan
BACKGROUND: Mcr-1-harboring Enterobacteriaceae are reported worldwide since their first discovery in 2015. However, a limited number of studies are available that compared full-length plasmid sequences of human and animal origins. METHODS: In this study, mcr-1-bearing plasmids from seven Escherichia coli isolates recovered from patients (n = 3), poultry meat (n = 2) and turkey meat (n = 2) in Switzerland were further analyzed and compared. Isolates were characterized by multilocus sequence typing (MLST)...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28877757/whole-genome-sequencing-of-esbl-producing-escherichia-coli-isolated-from-patients-farm-waste-and-canals-in-thailand
#19
Chakkaphan Runcharoen, Kathy E Raven, Sandra Reuter, Teemu Kallonen, Suporn Paksanont, Jeeranan Thammachote, Suthatip Anun, Beth Blane, Julian Parkhill, Sharon J Peacock, Narisara Chantratita
BACKGROUND: Tackling multidrug-resistant Escherichia coli requires evidence from One Health studies that capture numerous potential reservoirs in circumscribed geographic areas. METHODS: We conducted a survey of extended β-lactamase (ESBL)-producing E. coli isolated from patients, canals and livestock wastewater in eastern Thailand between 2014 and 2015, and analyzed isolates using whole genome sequencing. RESULTS: The bacterial collection of 149 isolates consisted of 84 isolates from a single hospital and 65 from the hospital sewer, canals and farm wastewater within a 20 km radius...
September 6, 2017: Genome Medicine
https://www.readbyqxmd.com/read/28877366/melanocortin-receptor-subtypes-are-expressed-on-cells-in-the-oligodendroglial-lineage-and-signal-acth-protection
#20
Joyce A Benjamins, Liljana Nedelkoska, Robert P Lisak
ACTH, a melanocortin peptide used to treat multiple sclerosis (MS) relapses, acts by stimulating adrenal corticosteroid (CS) production via melanocortin receptor 2 (MC2R), but it may also exert a therapeutic effect independent of CS by stimulating other melanocortin receptors (MCR) distributed in many tissues, including the brain. We reported that oligodendroglia (OL) and oligodendroglial precursor cells (OPC) express MC4R, and that ACTH 1-39 protects OL and OPC in vitro from cell death induced by mechanisms likely involved in white matter damage in MS...
September 6, 2017: Journal of Neuroscience Research
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