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Multi-resistant organisms

Scott N Furlan, Benjamin Watkins, Victor Tkachev, Sarah Cooley, Angela Panoskaltsis-Mortari, Kayla Betz, Melanie Brown, Daniel J Hunt, John B Schell, Katie Zeleski, Alison Yu, Cindy Giver, Edmund Waller, Jeffrey S Miller, Bruce R Blazar, Leslie S Kean
One of the central challenges of transplantation is the development of alloreactivity despite the use of multi-agent immunoprophylaxis. Effective control of this immune-suppression-resistant T cell activation represents one of the key unmet needs in the fields of both solid organ and hematopoietic stem cell transplant (HCT). To address this unmet need, we have used a highly-translational non-human primate model to interrogate the transcriptional signature of T cells during Breakthrough Acute GVHD that occurs in the setting of clinically-relevant immune suppression and compared this to the Hyperacute GVHD, that develops in unprophylaxed or sub-optimally prophylaxed transplant recipients...
October 6, 2016: Blood
H Claude Sagi, David Donohue, Seth Cooper, David P Barei, Justin Siebler, Michael T Archdeacon, Marcus Sciadini, Michelle Romeo, Patrick F Bergin, Thomas Higgins, Hassan Mir
OBJECTIVES: The current literature focuses on wound severity, time to debridement and antibiotic administration with respect to risk of infection after open fracture. The purpose of this analysis was to determine if either the incidence of post-traumatic infection or causative organism varies with treating institution or the season in which the open fracture occurred. DESIGN: Retrospective review. SETTING: Seven level-one regional referral trauma centers located in each of the seven climatic regions of the continental United States (Northwest; High Plains; Midwest/Ohio Valley; New England/Mid-Atlantic; Southeast; South; and Southwest)...
October 7, 2016: Journal of Orthopaedic Trauma
Tetsuhito Muranaka, Satoshi Yuki, Yoshito Komatsu, Kentaro Sawada, Kazuaki Harada, Yasuyuki Kawamoto, Hiroshi Nakatsumi, Naoya Sakamoto
PURPOSE: The International Organization for Standardization-5fluorouracil (FU) 10 trial found that bolus 5-FU and l-leucovorin was not inferior to S-1 in the treatment of gastric cancer (GC). Continuous 5-FU and the rapid injection of 5-FU have different anti-cancer effects. Thus, bolus 5-FU and l-leucovorin treatment might be useful for oral FU-resistant GC. MATERIALS AND METHODS: We retrospectively analyzed the medical records of all patients with S-1 or capecitabine-resistant, unresectable, or recurrent GC treated with bolus 5-FU and l-leucovorin between January 2010 and December 2015 at Hokkaido University Hospital...
September 2016: Journal of Gastric Cancer
Arshad Khan, Robert L Hunter, Chinnaswamy Jagannath
Mesenchymal stem cells (MSCs) are non-hematopoietic cells that occur in almost all human tissues and can be cultured and expanded to large numbers in vitro. They secrete growth factors, cytokines, and chemokines and express Toll-like receptors on their surface, although multiple cell biological mechanisms remain unclear. MSCs are multi-potent and can differentiate into many cell types including adipocytes, neuronal cells and osteoclasts. Despite gaps in cell biology, because of their immunomodulatory and regenerative capacity, several hundred clinical trials have used MSCs for therapy of cancer, autoimmune diseases and control of inflammation during organ transplantation...
September 28, 2016: Tuberculosis
Philippa C Matthews, Lucinda K Barrett, Stephanie Warren, Nicole Stoesser, Mel Snelling, Matthew Scarborough, Nicola Jones
BACKGROUND: Fosfomycin is increasingly called upon for the treatment of multi drug-resistant (MDR) organisms causing urinary tract infection (UTI). We reviewed oral fosfomycin use for UTI treatment in a large UK hospital. The primary goal was to audit our clinical practice against current national guidelines. Secondary aims were to identify factors associated with treatment failure, and to investigate the potential for using fosfomycin in patients with co-morbidities. METHODS: We retrospectively studied 75 adult patients with UTI who received 151 episodes of treatment with fosfomycin from March 2013 to June 2015...
October 11, 2016: BMC Infectious Diseases
G P Senadheera, S Sri Ranganathan, G Patabendige, G H Fernando, D Gamage, R M Maneke, B M Fernandopulle
OBJECTIVES: Antibacterial resistance (ABR) is a public threat. Sri Lanka is a country with limited surveillance of ABR in the community. The WHO methodology was adapted to identify ABR in outpatient settings (nonhospitalised patients) and its link to consumption of antibiotics. METHODS: It was a cross-sectional descriptive community based study to collect ABR data from Out Patient Department (OPD) of two leading Teaching Hospitals in Colombo district. The indicator organism Escherichia coli (E...
2016: Ceylon Medical Journal
Onur Kilic, David Pamies, Emily Lavell, Paula Schiapparelli, Yun Feng, Thomas Hartung, Anna Bal-Price, Helena T Hogberg, Alfredo Quinones-Hinojosa, Hugo Guerrero-Cazares, Andre Levchenko
Migration of neural progenitors in the complex tissue environment of the central nervous system is not well understood. Progress in this area has the potential to drive breakthroughs in neuroregenerative therapies, brain cancer treatments, and neurodevelopmental studies. To a large extent, advances have been limited due to a lack of controlled environments recapitulating characteristics of the central nervous system milieu. Reductionist cell culture models are frequently too simplistic, and physiologically more relevant approaches such as ex vivo brain slices or in situ experiments provide little control and make information extraction difficult...
October 18, 2016: Lab on a Chip
Marta Maciejewska, Delphine Adam, Loïc Martinet, Aymeric Naômé, Magdalena Całusińska, Philippe Delfosse, Monique Carnol, Hazel A Barton, Marie-Pierre Hayette, Nicolas Smargiasso, Edwin De Pauw, Marc Hanikenne, Denis Baurain, Sébastien Rigali
Moonmilk speleothems of limestone caves host a rich microbiome, among which Actinobacteria represent one of the most abundant phyla. Ancient medical texts reported that moonmilk had therapeutical properties, thereby suggesting that its filamentous endemic actinobacterial population might be a source of natural products useful in human treatment. In this work, a screening approach was undertaken in order to isolate cultivable Actinobacteria from moonmilk of the Grotte des Collemboles in Belgium, to evaluate their taxonomic profile, and to assess their potential in biosynthesis of antimicrobials...
2016: Frontiers in Microbiology
Benjamin Youenou, Edmond Hien, Amélie Deredjian, Elisabeth Brothier, Sabine Favre-Bonté, Sylvie Nazaret
This study examined the long-term effects of the landfill disposal of untreated urban waste for soil fertilization on the prevalence and antibiotic resistance profiles of various human opportunistic pathogens in soils from Burkina Faso. Samples were collected at three sites in the periphery of Ouagadougou during two campaigns in 2008 and 2011. At each site, amendment led to changes in physico-chemical characteristics as shown by the increase in pH, CEC, total C, total N, and metal contents. Similarly, the numbers of total heterotrophic bacteria were higher in the amended fields than in the control ones...
September 30, 2016: Environmental Science and Pollution Research International
Mai Yamamoto, Ritchie Ly, Biban Gill, Yujie Zhu, Jose Moran-Mirabal, Philip Britz-McKibbin
Capillary electrophoresis-mass spectrometry (CE-MS) represents a high efficiency microscale separation platform for untargeted profiling of polar/ionic metabolites that is ideal for volume-restricted biological specimens with minimal sample workup. Despite these advantages, the long-term stability of CE-MS remains a major obstacle hampering its widespread application in metabolomics notably for routine analysis of anionic metabolites under negative ion mode conditions. Herein, we report for the first time that commonly used ammonia containing buffers compatible with electrospray ionization (ESI)-MS can compromise the integrity of fused-silica capillaries via aminolysis of their outer polyimide coating...
October 10, 2016: Analytical Chemistry
Dagmara Hering, Carl Schultz, Markus P Schlaich
PURPOSE: Resistant hypertension (RH) is a major and growing public health problem. While noncompliance to antihypertensive medication is a major concern in RH patients, it is estimated that even with adequate multi-drug regimens, approximately 10% of patients diagnosed with hypertension fulfill the criteria of true RH. Patients with sustained blood pressure (BP) elevation display high risk for development of target organ damage and associated cardiovascular morbidity and mortality. While optimized pharmacologic therapy, including the use of mineralocorticoid receptor antagonists to guideline-based antihypertensive drug therapy, is effective for improving BP control in this patient cohort, a sizable proportion of RH patients' BP remains uncontrolled, and alternative therapeutic strategies are warranted...
September 23, 2016: Clinical Therapeutics
Charlotte J Houldcroft, Josephine M Bryant, Daniel P Depledge, Ben K Margetts, Jacob Simmonds, Stephanos Nicolaou, Helena J Tutill, Rachel Williams, Austen J J Worth, Stephen D Marks, Paul Veys, Elizabeth Whittaker, Judith Breuer
Human cytomegalovirus (HCMV) is a significant pathogen in immunocompromised individuals, with the potential to cause fatal pneumonitis and colitis, as well as increasing the risk of organ rejection in transplant patients. With the advent of new anti-HCMV drugs there is therefore considerable interest in using virus sequence data to monitor emerging resistance to antiviral drugs in HCMV viraemia and disease, including the identification of putative new mutations. We used target-enrichment to deep sequence HCMV DNA from 11 immunosuppressed pediatric patients receiving single or combination anti-HCMV treatment, serially sampled over 1-27 weeks...
2016: Frontiers in Microbiology
Younggul Song, Hyunhak Jeong, Seungjun Chung, Geun Ho Ahn, Tae-Young Kim, Jingon Jang, Daekyoung Yoo, Heejun Jeong, Ali Javey, Takhee Lee
The origin of negative differential resistance (NDR) and its derivative intermediate resistive states (IRSs) of nanocomposite memory systems have not been clearly analyzed for the past decade. To address this issue, we investigate the current fluctuations of organic nanocomposite memory devices with NDR and the IRSs under various temperature conditions. The 1/f noise scaling behaviors at various temperature conditions in the IRSs and telegraphic noise in NDR indicate the localized current pathways in the organic nanocomposite layers for each IRS...
2016: Scientific Reports
Diana Braunholz, Mohammad Saki, Franziska Niehr, Merve Öztürk, Berta Borràs Puértolas, Robert Konschak, Volker Budach, Ingeborg Tinhofer
In solid tumours millions of cells are shed into the blood circulation each day. Only a subset of these circulating tumour cells (CTCs) survive, many of them presumable because of their potential to form multi-cellular clusters also named spheroids. Tumour cells within these spheroids are protected from anoikis, which allows them to metastasize to distant organs or re-seed at the primary site. We used spheroid cultures of head and neck squamous cell carcinoma (HNSCC) cell lines as a model for such CTC clusters for determining the role of the epidermal growth factor receptor (EGFR) in cluster formation ability and cell survival after detachment from the extra-cellular matrix...
2016: PloS One
Michael H Limberg, Julia Schulte, Tita Aryani, Regina Mahr, Meike Baumgart, Michael Bott, Wolfgang Wiechert, Marco Oldiges
Performance losses during scale-up are described since decades, but are still one of the major obstacles for industrial bioprocess development. Consequently, robustness to inhomogeneous cultivation environments is an important quality of industrial production organisms. Especially, Corynebacterium glutamicum was proven to have an outstanding resistance against rapid changes of oxygen and substrate availability as occurring in industrial scale bioreactors. This study focuses on the identification of metabolic key mechanisms for this robustness to get a deeper insight and provide future targets for process orientated strain development...
September 19, 2016: Biotechnology and Bioengineering
Alvaro A Ordonez, Edward A Weinstein, Lauren E Bambarger, Vikram Saini, Yong S Chang, Vincent P DeMarco, Mariah H Klunk, Michael E Urbanowski, Kimberly L Moulton, Allison M Murawski, Supriya Pokkali, Alvin S Kalinda, Sanjay K Jain
: The modern patient is increasingly susceptible to bacterial infections including those due to multi-drug resistant organisms (MDROs). Noninvasive whole-body analysis with pathogen-specific imaging technologies can significantly improve patient outcomes by rapidly identifying a source of infection and monitoring the response to treatment, but no such technology exists clinically. METHODS: We systematic screened 961 random, radiolabeled molecules in silico as substrates for essential metabolic pathways in bacteria, followed by in vitro uptake in representative bacteria - Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and mycobacteria...
September 15, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Ajay K Monnappa, Wasimul Bari, Seong Yeol Choi, Robert J Mitchell
One beguiling alternative to antibiotics for treating multi-drug resistant infections are Bdellovibrio-and-like-organisms (BALOs), predatory bacteria known to attack human pathogens. Consequently, in this study, the responses from four cell lines (three human and one mouse) were characterized during an exposure to different predatory bacteria, Bdellovibrio bacteriovorus HD100, Bacteriovorus BY1 and Bacteriovorax stolpii EB1. TNF-α levels were induced in Raw 264.7 mouse macrophage cultures with each predator, but paled in comparison to those obtained with E...
2016: Scientific Reports
Shahriar Sepahvand, Monir Doudi, Mohammad Ali Davarpanah, Abbas Bahador, Mehranoosh Ahmadi
Acinetobacter baumanni is known as a worldwide emerging nosocomial infections and it is classified as one of the six dangerous microorganisms by Diseases Society of America. Multi drug-resistant strains of A. baumannii have been reported in recent decades, which may be a result of the high use of antimicrobial agents. Colistin is the last form of treatment against this organism. The presence of pmrA and pmrB genes in A. baumannii causes the resistance of this organism against Colistin. This cross-sectional study was performed on 100 samples of A...
July 2016: Pakistan Journal of Pharmaceutical Sciences
Amanda Plummer, Martin Wildman, Tim Gleeson
BACKGROUND: Respiratory disease is the major cause of mortality and morbidity in cystic fibrosis. Life expectancy of people with cystic fibrosis has increased dramatically in the last 40 years. One of the major reasons for this increase is the mounting use of antibiotics to treat chest exacerbations caused by bacterial infections. The optimal duration of intravenous antibiotic therapy is not clearly defined. Individuals usually receive intravenous antibiotics for 14 days, but treatment may range from 10 to 21 days...
September 1, 2016: Cochrane Database of Systematic Reviews
Peng-Fei Liu, Yishuai Du, Lingjie Meng, Xian Li, Ying Liu
Aeromonas salmonicida, an important pathogenic bacterium which induces furunculosis, is globally causing increased risks in Atlantic salmon (Salmo salar) farming. Although the kidney is the main target organ of A. salmonicida, the metabolic profiling of kidney in response to A. salmonicida in vivo remains unknown. Here, we used (1)H nuclear magnetic resonance (NMR) to comprehensively analyze the metabolic changes in the kidney of Atlantic salmon. Through the NOESYPR1D spectrum combined with multi-variate pattern recognition analysis, including principal component analysis (PCA) and orthogonal partial least-squares discriminant analysis (OPLS-DA) models, significant metabolic changes were observed seven and 14 days post-infection and in a control group...
August 27, 2016: Fish & Shellfish Immunology
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