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https://www.readbyqxmd.com/read/28645580/chemostat-studies-of-bacteriophage-m13-infected-escherichia-coli-jm109-for-continuous-ssdna-production
#1
Benjamin Kick, Karl Lorenz Behler, Timm Steffen Severin, Dirk Weuster-Botz
Steady state studies in a chemostat enable the control of microbial growth rate at defined reaction conditions. The effects of bacteriophage M13 infection on maximum growth rate of Escherichia coli JM109 were studied in parallel operated chemostats on a milliliter-scale to analyze the steady state kinetics of phage production. The bacteriophage infection led to a decrease in maximum specific growth rate of 15 % from 0.74 h(-1) to 0.63 h(-1). Under steady state conditions, a constant cell specific ssDNA formation rate of 0...
June 20, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28642462/metabolic-changes-in-medaka-fish-induced-by-cyanobacterial-exposures-in-mesocosms-an-integrative-approach-combining-proteomic-and-metabolomic-analyses
#2
Benoît Sotton, Alain Paris, Séverine Le Manach, Alain Blond, Gérard Lacroix, Alexis Millot, Charlotte Duval, Hélène Huet, Qin Qiao, Sophie Labrut, Giovanni Chiapetta, Joelle Vinh, Arnaud Catherine, Benjamin Marie
Cyanobacterial blooms pose serious threats to aquatic organisms and strongly impact the functioning of aquatic ecosystems. Due to their ability to produce a wide range of potentially bioactive secondary metabolites, so called cyanotoxins, cyanobacteria have been extensively studied in the past decades. Proteomic and metabolomic analyses provide a unique opportunity to evaluate the global response of hundreds of proteins and metabolites at a glance. In this study, we provide the first combined utilization of these methods targeted to identify the response of fish to bloom-forming cyanobacteria...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642251/physical-activity-cognitive-decline-and-risk-of-dementia-28-year-follow-up-of-whitehall-ii-cohort-study
#3
Séverine Sabia, Aline Dugravot, Jean-François Dartigues, Jessica Abell, Alexis Elbaz, Mika Kivimäki, Archana Singh-Manoux
Objective To test the hypotheses that physical activity in midlife is not associated with a reduced risk of dementia and that the preclinical phase of dementia is characterised by a decline in physical activity.Design Prospective cohort study with a mean follow-up of 27 years.Setting Civil service departments in London (Whitehall II study).Participants 10 308 participants aged 35-55 years at study inception (1985-88). Exposures included time spent in mild, moderate to vigorous, and total physical activity assessed seven times between 1985 and 2013 and categorised as "recommended" if duration of moderate to vigorous physical activity was 2...
June 22, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28639543/rapid-detection-of-extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae-in-blood-cultures-using-the-esbl-ndp-test-in-cotonou-benin
#4
Dissou Affolabi, Fredéric Sogbo, Gracieux Laleye, Jeanne Orekan, Faridath Massou, Aderemi Kehinde, Séverin Anagonou
PURPOSE: Rapid and inexpensive tests for detecting extended-spectrum-β-lactamase (ESBL)-producing Enterobacteriaceae are needed, particularly in low-resource countries where infections with these bacteria constitute a major public health issue. The recently described ESBL NDP test performed well in developed countries. This study was designed to assess performance, cost and feasibility of this test in positive blood cultures, in Cotonou, Benin (West Africa). METHODOLOGY: The test was performed on 175 positive Bactec broth blood cultures containing Enterobacteriaceae, and blindly compared with the double-disc synergy test (DDST) for the phenotypic detection of ESBL producers...
June 21, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28638315/acute-abdomen-a-rare-case-of-ruptured-hepatocellular-carcinoma
#5
Severin Gloor, Kai Oliver Jensen, Stefan Breitenstein, Christoph A Binkert, Eliane Angst, Franc Heinrich Hetzer
Spontaneous ruptures of hepatocellular carcinoma (HCC) are rare. Nevertheless they may lead to difficult decisions in the emergency situation. The acute therapies include conservative treatment, transarterial embolization and surgery. Curative treatment of HCC can be achieved by liver resection solely. The decision-making depends on prognostic patient's factors, such as hepatic viral infection status, Child-Pugh grade, liver cirrhosis and number of tumors. In this case transarterial embolization was preferable as a bridging therapy prior to further diagnostics and therapy, to lower the perioperative morbidity and mortality...
January 2017: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/28636926/enhanced-human-bone-marrow-mesenchymal-stromal-cell-adhesion-on-scaffolds-promotes-cell-survival-and-bone-formation
#6
Miryam Mebarki, Laura Coquelin, Pierre Layrolle, Séverine Battaglia, Marine Tossou, Philippe Hernigou, Hélène Rouard, Nathalie Chevallier
In order to induce an efficient bone formation with human bone marrow mesenchymal stromal cells (hBMSC) associated to a scaffold, it is crucial to determine the key points of the hBMSC action after in vivo transplantation as well as the appropriate features of a scaffold. To this aim we compared the hBMSC behavior when grafted onto two biomaterials allowing different bone potential in vivo. The cancellous devitalized Tutoplast®-processed bone (TPB) and the synthetic hydroxyapatite/β-tricalcium-phosphate (HA/βTCP) which give at 6 weeks 100% and 50% of bone formation respectively...
June 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28635312/predictors-of-adherence-to-aerobic-exercise-in-rectal-cancer-patients-during-and-after-neoadjuvant-chemoradiotherapy
#7
Andria R Morielli, Normand G Boulé, Nawaid Usmani, Kurian Joseph, Keith Tankel, Diane Severin, Kerry S Courneya
This pilot study explored predictors of adherence to exercise during and after neoadjuvant chemoradiotherapy (NACRT) in rectal cancer patients. Eighteen rectal cancer patients were prescribed three supervised aerobic exercise sessions/week during NACRT followed by ≥150 min/week of unsupervised aerobic exercise after NACRT. Although not statistically significant, adherence to supervised exercise during NACRT was meaningfully better for patients who were women (d = .82; P = .12), younger (d = -.62; P = ...
June 21, 2017: Psychology, Health & Medicine
https://www.readbyqxmd.com/read/28634226/phostine-pst3-1a-targets-mgat5-and-inhibits-glioblastoma-initiating-cell-invasiveness-and-proliferation
#8
Zahra Hassani, Ali Saleh, Soumaya Turpault, Salim Khiati, Willy Morelle, Jacques Vignon, Jean-Philippe Hugnot, Emmanuelle Uro-Coste, Philippe Legrand, Marcel Delaforge, Séverine Loiseau, Ludovic Clarion, Marc Lecouvey, Jean-Noël Volle, David Virieux, Jean-Luc Pirat, Hugues Duffau, Norbert Bakalara
Glioblastoma multiforme (GBM) is the most common primary malignant brain tumor and accounts for a significant proportion of all primary brain tumors. Median survival after treatment is around 15 months. Remodeling of N-glycans by the N-acetylglucosamine glycosyltransferase (MGAT5) regulates tumoral development. Here, perturbation of MGAT5 enzymatic activity by the small-molecule inhibitor 3-Hydroxy-4,5-bis-benzyloxy-6-benzyloxymethyl-2-phenyl2-oxo-2λ5-[1,2]oxaphosphinane (PST3.1a) restrains GBM growth. In cell based assays it is demonstrated that PST3...
June 20, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28634123/clinical-utility-of-chromosomal-aneusomy-in-individuals-at-high-risk-of-lung-cancer
#9
Anna E Barón, Severine Kako, William J Feser, Heather Malinowski, Daniel Merrick, Kavita Garg, Stephen Malkoski, Shannon Pretzel, Jill M Siegfried, Wilbur A Franklin, York Miller, Holly J Wolf, Marileila Varella-Garcia
INTRODUCTION: Low dose CT screening for lung cancer has a high false positive rate with frequent discovery of indeterminate pulmonary nodules. Noninvasive biomarkers are needed to reduce false positives and improve risk stratification. A retrospective longitudinal evaluation was performed to assess chromosomal aneusomy in sputum via fluorescence in situ hybridization (CA-FISH) in four nested case-control studies. METHODS: ROC analysis resulted in two grouped cohorts: High Risk (CO High Risk and CO Nodule; 68 Cases, 69 controls) and Screening (ACRIN/NLST and PLuSS; 97 Cases, 185 controls)...
June 17, 2017: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/28630407/colony-adaptive-response-to-simulated-heat-waves-and-consequences-at-the-individual-level-in-honeybees-apis-mellifera
#10
Célia Bordier, Hélène Dechatre, Séverine Suchail, Mathilde Peruzzi, Samuel Soubeyrand, Maryline Pioz, Michel Pélissier, Didier Crauser, Yves Le Conte, Cédric Alaux
Since climate change is expected to bring more severe and frequent extreme weather events such as heat waves, assessing the physiological and behavioural sensitivity of organisms to temperature becomes a priority. We therefore investigated the responses of honeybees, an important insect pollinator, to simulated heat waves (SHW). Honeybees are known to maintain strict brood thermoregulation, but the consequences at the colony and individual levels remain poorly understood. For the first time, we quantified and modelled colony real-time activity and found a 70% increase in foraging activity with SHW, which was likely due to the recruitment of previously inactive bees...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28623360/endothelial-cell-derived-extracellular-vesicles-size-dependently-exert-procoagulant-activity-detected-by-thromboelastometry
#11
Wolfgang Holnthoner, Cornelia Bonstingl, Carina Hromada, Severin Muehleder, Johannes Zipperle, Stefan Stojkovic, Heinz Redl, Johann Wojta, Herbert Schöchl, Johannes Grillari, Sylvia Weilner, Christoph J Schlimp
Endothelial cells (ECs) are major modulators of hemostasis by expressing and releasing pro- and anticoagulant mediators into the circulation. Previous studies showed that cultured ECs release procoagulant mediators into cell culture supernatants as evidenced by the reduction of viscoelastic clotting time. This effect was reversed with an anti-tissue factor antibody. Here, we aimed to investigate whether tissue factor (TF) was released by endothelial-derived extracellular vesicles (EVs) and which portion of the released vesicles displays the most prominent procoagulant properties...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28623194/quantitative-mapping-of-microtubule-associated-protein-2c-map2c-phosphorylation-and-regulatory-protein-14-3-3%C3%AE-binding-sites-reveals-key-differences-between-map2c-and-its-homolog-tau
#12
Séverine Jansen, Kateřina Melková, Zuzana Trošanová, Kateřina Hanáková, Milan Zachrdla, Jiři Nováček, Erik Župa, Zbyněk Zdráhal, Jozef Hritz, Lukáš Žídek
No abstract text is available yet for this article.
June 16, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28622097/evolution-of-cytokines-and-inflammatory-biomarkers-during-infliximab-induction-therapy-and-the-impact-of-inflammatory-burden-on-primary-response-in-patients-with-crohn-s-disease
#13
Thomas Billiet, Isabelle Cleynen, Vera Ballet, Karolien Claes, Fred Princen, Sharat Singh, Marc Ferrante, Gert Van Assche, Ann Gils, Severine Vermeire
OBJECTIVE: Primary non-response to infliximab in Crohn's disease is still incompletely understood. Our aim was to further characterize the role of inflammatory burden during infliximab induction therapy. MATERIALS AND METHODS: We studied a well-characterized cohort of 201 anti-TNF naive Crohn's disease patients treated with infliximab 5mg/kg at week 0, 2, 6 and 14 who had serum samples drawn just before every infusion. All serum samples were analyzed for CRP, albumin, TNF, IFN-γ, IL-6, IL-8, IL-10, infliximab trough concentrations (in-house-developed ELISA) and antibodies to infliximab (HMSA, Prometheus Laboratories Inc...
June 16, 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/28617965/further-delineation-of-the-phenotype-caused-by-biallelic-variants-in-the-wdr4-gene
#14
Aurélien Trimouille, Eulalie Lasseaux, Pascal Barat, Caroline Deiller, Séverine Drunat, Caroline Rooryck, Benoît Arveiler, Didier Lacombe
Microcephalic primordial dwarfisms are a group of rare Mendelian disorders characterized by severe growth retardation and microcephaly. The molecular basis is heterogeneous, with disease-causing genes implicated in different cellular functions. Recently, 2 patients were reported with the same homozygous variant in the WDR4 gene, coding for an enzyme responsible for the m(7) G46 post transcriptional modification of tRNA. We report here two sisters harboring compound heterozygous variants of WDR4. Their phenotype differs from that of the first two described patients: they both have a severe microcephaly but only one of the two sisters had a head circumference at birth below -2 SD, their intellectual deficiency is less severe, and they have a GH deficiency and a partial hypogonadotropic hypogonadotropism...
June 15, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28617955/expression-atlas-and-comparative-coexpression-network-analyses-reveal-important-genes-involved-in-the-formation-of-lignified-cell-wall-in-brachypodium-distachyon
#15
Richard Sibout, Sebastian Proost, Bjoern Oest Hansen, Neha Vaid, Federico M Giorgi, Severine Ho-Yue-Kuang, Frédéric Legée, Laurent Cézart, Oumaya Bouchabké-Coussa, Camille Soulhat, Nicholas Provart, Asher Pasha, Philippe Le Bris, David Roujol, Herman Hofte, Elisabeth Jamet, Catherine Lapierre, Staffan Persson, Marek Mutwil
While Brachypodium distachyon (Brachypodium) is an emerging model for grasses, no expression atlas or gene coexpression network is available. Such tools are of high importance to provide insights into the function of Brachypodium genes. We present a detailed Brachypodium expression atlas, capturing gene expression in its major organs at different developmental stages. The data were integrated into a large-scale coexpression database ( www.gene2function.de), enabling identification of duplicated pathways and conserved processes across 10 plant species, thus allowing genome-wide inference of gene function...
June 15, 2017: New Phytologist
https://www.readbyqxmd.com/read/28615648/embryonic-exposure-to-the-widely-used-herbicide-atrazine-disrupts-meiosis-and-normal-follicle-formation-in-female-mice
#16
Aurore Gely-Pernot, Souhila Saci, Pierre-Yves Kernanec, Chunxiang Hao, Frank Giton, Christine Kervarrec, Sergei Tevosian, Severine Mazaud-Guittot, Fatima Smagulova
The widely-used herbicide atrazine (ATZ) is detected in ground and surface water in many countries. Several studies in animals have demonstrated that ATZ has endocrine-disrupting effects on male and female reproduction in many vertebrate species. In this study, we investigated the effects of ATZ exposure on meiosis, a key step in gametogenesis in mammals. The treatment was initiated before oocyte entry into meiosis, which occurs during the embryonic period in females. We found that embryonic exposure to ATZ increases the level of 8-oxo-guanine in the nucleus of meiotic cells, reflecting oxidative stress and affecting meiotic double-strand break repair, chromosome synapsis and crossover numbers...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28612834/sex-chromosome-aneuploidies-and-copy-number-variants-a-further-explanation-for-neurodevelopmental-prognosis-variability
#17
Jessica Le Gall, Mathilde Nizon, Olivier Pichon, Joris Andrieux, Séverine Audebert-Bellanger, Sabine Baron, Claire Beneteau, Frédéric Bilan, Odile Boute, Tiffany Busa, Valérie Cormier-Daire, Claude Ferec, Mélanie Fradin, Brigitte Gilbert-Dussardier, Sylvie Jaillard, Aia Jønch, Dominique Martin-Coignard, Sandra Mercier, Sébastien Moutton, Caroline Rooryck, Elise Schaefer, Marie Vincent, Damien Sanlaville, Cédric Le Caignec, Sébastien Jacquemont, Albert David, Bertrand Isidor
Sex chromosome aneuploidies (SCA) is a group of conditions in which individuals have an abnormal number of sex chromosomes. SCA, such as Klinefelter's syndrome, XYY syndrome, and Triple X syndrome are associated with a large range of neurological outcome. Another genetic event such as another cytogenetic abnormality may explain a part of this variable expressivity. In this study, we have recruited fourteen patients with intellectual disability or developmental delay carrying SCA associated with a copy-number variant (CNV)...
June 14, 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28608848/furanoterpene-diversity-and-variability-in-the-marine-sponge-spongia-officinalis-from-untargeted-lc-ms-ms-metabolomic-profiling-to-furanolactam-derivatives
#18
Cléa Bauvais, Natacha Bonneau, Alain Blond, Thierry Pérez, Marie-Lise Bourguet-Kondracki, Séverine Zirah
The Mediterranean marine sponge Spongia officinalis has been reported as a rich source of secondary metabolites and also as a bioindicator of water quality given its capacity to concentrate trace metals. In this study, we evaluated the chemical diversity within 30 S. officinalis samples collected over three years at two sites differentially impacted by anthropogenic pollutants located near Marseille (South of France). Untargeted liquid chromatography-mass spectrometry (LC-MS) metabolomic profiling (C18 LC, ESI-Q-TOF MS) combined with XCMS Online data processing and multivariate statistical analysis revealed 297 peaks assigned to at least 86 compounds...
June 13, 2017: Metabolites
https://www.readbyqxmd.com/read/28608135/can-proportional-ventilation-modes-facilitate-exercise-in-critically-ill-patients-a-physiological-cross-over-study-pressure-support-versus-proportional-ventilation-during-lower-limb-exercise-in-ventilated-critically-ill-patients
#19
Evangelia Akoumianaki, Nicolas Dousse, Aissam Lyazidi, Jean-Claude Lefebvre, Severine Graf, Ricardo Luiz Cordioli, Nathalie Rey, Jean-Christophe Marie Richard, Laurent Brochard
BACKGROUND: Early exercise of critically ill patients may have beneficial effects on muscle strength, mass and systemic inflammation. During pressure support ventilation (PSV), a mismatch between demand and assist could increase work of breathing and limit exercise. A better exercise tolerance is possible with a proportional mode of ventilation (Proportional Assist Ventilation, PAV+ and Neurally Adjusted Ventilatory Assist, NAVA). We examined whether, in critically ill patients, PSV and proportional ventilation have different effects on respiratory muscles unloading and work efficiency during exercise...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28603972/the-intricate-structural-chemistry-of-m-ii-2nln-type-assemblies
#20
Giacomo Cecot, Mathieu Marmier, Silvano Geremia, Rita De Zorzi, Anna V Vologzhanina, Philip Pattison, Euro Solari, Farzaneh Fadaei Tirani, Rosario Scopelliti, Kay Severin
The reaction of cis-blocked, square-planar M(II) complexes with tetratopic N-donor ligands is known to give metallasupramolecular assemblies of the formula M2nLn. These assemblies typically adopt barrel-like structures, with the ligands paneling the sides of the barrels. However, alternative structures are possible, as demonstrated by the recent discovery of a Pt8L4 cage with unusual gyrobifastigium-like geometry. To date, the factors that govern the assembly of M(II)2nLn complexes are not well understood. Herein, we provide a geometric analysis of M2nLn complexes, and we discuss how size and geometry of the ligand is expected to influence the self-assembly process...
June 21, 2017: Journal of the American Chemical Society
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