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https://www.readbyqxmd.com/read/28650638/identification-and-structure-activity-relationships-of-novel-compounds-that-potentiate-the-activities-of-antibiotics-in-escherichia-coli
#1
Keith M Haynes, Narges Abdali, Varsha Jhawar, Helen I Zgurskaya, Jerry M Parks, Adam T Green, Jerome Yves Baudry, Valentin V Rybenkov, Jeremy C Smith, John K Walker
In Gram-negative bacteria, efflux pumps are able to prevent effective cellular concentrations from being achieved for a number of antibiotics. Small molecule adjuvants that act as efflux pump inhibitors (EPIs) have the potential to reinvigorate existing antibiotics that are currently ineffective due to efflux mechanisms. Through a combination of rigorous experimental screening and in silico virtual screening we recently identified novel classes of EPIs that interact with the membrane fusion protein AcrA, a critical component of the AcrAB-TolC efflux pump in E...
June 26, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28650457/fibroblast-growth-factor-19-regulates-skeletal-muscle-mass-and-ameliorates-muscle-wasting-in-mice
#2
Bérengère Benoit, Emmanuelle Meugnier, Martina Castelli, Stéphanie Chanon, Aurélie Vieille-Marchiset, Christine Durand, Nadia Bendridi, Sandra Pesenti, Pierre-Axel Monternier, Anne-Cécile Durieux, Damien Freyssenet, Jennifer Rieusset, Etienne Lefai, Hubert Vidal, Jérôme Ruzzin
The endocrine-derived hormone fibroblast growth factor (FGF) 19 has recently emerged as a potential target for treating metabolic disease. Given that skeletal muscle is a key metabolic organ, we explored the role of FGF19 in that tissue. Here we report a novel function of FGF19 in regulating skeletal muscle mass through enlargement of muscle fiber size, and in protecting muscle from atrophy. Treatment with FGF19 causes skeletal muscle hypertrophy in mice, while physiological and pharmacological doses of FGF19 substantially increase the size of human myotubes in vitro...
June 26, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28649783/water-and-carbon-dioxide-a-unique-solvent-for-the-catalytic-polymerization-of-ethylene-in-miniemulsion
#3
Jean-Christophe Daigle, Frank P Lucien, Per B Zetterlund, Jerome P Claverie
The catalytic polymerization of ethylene is performed in water pressurized with CO2. The size of the initial monomer droplets and of the resulting polymer particles can be varied by simply changing the CO2 pressure. Furthermore, at identical ethylene partial pressure, the polymerizations performed in the presence of CO2 are significantly faster than in its absence. Thus, the combination of CO2 and water is a promising green solvent to perform catalytic emulsion polymerizations.
June 26, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28649644/constitutional-variants-are-not-associated-with-her2-positive-breast-cancer-results-from-the-signal-phare-clinical-cohort
#4
Xavier Pivot, Gilles Romieu, Pierre Fumoleau, Maria Rios, Hervé Bonnefoi, Thomas Bachelot, Patrick Soulié, Christelle Jouannaud, Hugues Bourgeois, Thierry Petit, Isabelle Tennevet, David Assouline, Marie-Christine Mathieu, Jean-Philippe Jacquin, Sandrine Lavau-Denes, Ariane Darut-Jouve, Jean-Marc Ferrero, Carole Tarpin, Christelle Lévy, Valérie Delecroix, Véronique Trillet-Lenoir, Oana Cojocarasu, Jérôme Meunier, Jean-Yves Pierga, Cécile Agostini, Pierre Kerbrat, Céline Faure-Mercier, Hélène Blanché, Mourad Sahbatou, Anne Boland, Delphine Bacq, Céline Besse, Fabien Calvo, Alexia Renaud, Jean-François Deleuze, Iris Pauporté, Gilles Thomas, David G Cox
Human epidermal growth factor receptor 2-positive breast cancer is a subtype of interest regarding its outcome and the impressive impact of human epidermal growth factor receptor 2 targeted therapy. Constitutional variants may be involved in the aetiology of human epidermal growth factor receptor 2-positive breast cancer, and we propose a case-case study to test the hypothesis that single nucleotide polymorphisms may be associated with human epidermal growth factor receptor 2 status. A Genome-Wide Association Study was used in a cohort of 9836 patients from the SIGNAL/PHARE study (NCT00381901-RECF1098)...
2017: NPJ Breast Cancer
https://www.readbyqxmd.com/read/28648549/hippocampal-spatial-mechanisms-relate-to-the-development-of-arithmetic-symbol-processing-in-children
#5
Romain Mathieu, Justine Epinat-Duclos, Jessica Léone, Michel Fayol, Catherine Thevenot, Jérôme Prado
Understanding the meaning of abstract mathematical symbols is a cornerstone of arithmetic learning in children. Studies have long focused on the role of spatial intuitions in the processing of numerals. However, it has been argued that such intuitions may also underlie symbols that convey fundamental arithmetic concepts, such as arithmetic operators. In the present cross-sectional study, we used fMRI to investigate how and when associations between arithmetic operators and brain regions processing spatial information emerge in children from 3(rd) to 10(th) grade...
June 13, 2017: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/28648477/time-to-antibiotics-administration-and-outcome-in-community-acquired-pneumonia-secondary-analysis-of-a-randomized-controlled-trial
#6
Christophe Marti, Gregor John, Daniel Genné, Virginie Prendki, Olivier T Rutschmann, Jérôme Stirnemann, Nicolas Garin
BACKGROUND: The association between early antibiotic administration and outcomes remains controversial in patients hospitalized for community-acquired pneumonia. METHODS: We performed a secondary analysis of a randomized controlled trial comparing two antibiotic treatment strategies for patients hospitalized for moderately severe CAP. The univariate and multivariate associations between time to antibiotic administration (TTA) and time to clinical stability were assessed using a Cox proportional hazard model...
June 22, 2017: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/28647699/proteomic-analysis-of-normal-and-cancer-cervical-cell-lines-reveals-deregulation-of-cytoskeleton-associated-proteins
#7
Kalliopi I Pappa, Vasiliki Lygirou, Georgia Kontostathi, Jerome Zoidakis, Manousos Makridakis, Konstantinos Vougas, George Daskalakis, Alexander Polyzos, Nicholas P Anagnou
BACKGROUND: Both HPV-positive and -negative cervical cancers are primarily associated with features of cell cycle and cytoskeletal disruption; however, the actual biological processes affected remain elusive. To this end, we systematically characterized the intracellular proteomic profiles of four distinct and informative cervical cell lines. MATERIALS AND METHODS: Cell extracts from a normal cervical (HCK1T) and three cervical cancer cell lines, one HPV-negative (C33A), and two HPV-positive, SiHa (HPV16+) and HeLa (HPV18+), were analyzed by 2-dimensional electrophoresis and differentially expressed proteins were identified by MALDI-TOF mass spectrometry, while differential expression was confirmed by western blot analysis...
July 2017: Cancer Genomics & Proteomics
https://www.readbyqxmd.com/read/28647110/success-of-tardive-electroconvulsive-therapy-sessions-after-loxapine-induced-malignant-syndrome-in-the-context-of-very-poor-metabolisation
#8
Juliette Descoeur, Laurent Philibert, Kevin Chalard, Jérôme Attal, Pierre Petit, Kada Klouche, Mathieu Olivier
We report the success of tardive electroconvulsive therapy in a case of loxapine malignant syndrome with catatonia. Loxapine and its metabolites were measured in biological samples by liquid chromatography coupled to tandem mass spectrometry. Genes were studied by sequencing and quantitative polymerase chain reaction (PCR). Plasmatic drug concentrations showed a supratherapeutic concentration of loxapine with a very low 8-hydroxyloxapine/loxapine ratio (range from 0.32 to 0.66, normal value>2 for 100mg) and a very long elimination half-life of loxapine (half-life>140h, normal value from 1 to 4hours)...
May 29, 2017: Thérapie
https://www.readbyqxmd.com/read/28646448/purification-of-the-exopolysaccharide-produced-by-alteromonas-infernus-identification-of-endotoxins-and-effective-process-to-remove-them
#9
Alicia Grivaud-Le Du, Agata Zykwinska, Corinne Sinquin, Jacqueline Ratiskol, Pierre Weiss, Claire Vinatier, Jérôme Guicheux, Christine Delbarre-Ladrat, Sylvia Colliec-Jouault
Alteromonas infernus bacterium isolated from deep-sea hydrothermal vents can produce by fermentation a high molecular weight exopolysaccharide (EPS) called GY785. This EPS described as a new source of glycosaminoglycan-like molecule presents a great potential for pharmaceutical and biotechnological applications. However, this unusual EPS is secreted by a Gram-negative bacterium and can be therefore contaminated by endotoxins, in particular the lipopolysaccharides (LPS). Biochemical and chemical analyses of the LPS extracted from A...
June 23, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28646268/the-role-of-perceived-sleep-norms-in-subjective-sleep-appraisals-and-sleep-related-illness-behavior
#10
Mazheruddin M Mulla, Jerome A Lewis, James C Hamilton, Joshua Tutek, Sarah E Emert, Tricia H Witte, Kenneth L Lichstein
The present investigation sought to extend extant research on subjective sleep complaints by examining their relation to perceived sleep norms. Results from two studies showed that individuals' distress and illness behavior in response to symptoms of fatigue and non-restorative sleep was influenced by their perceptions of peer norms for those symptoms. Individuals who believed they experienced a greater degree of fatigue and non-restorative sleep than their peers reported more distress arising from those symptoms, and were also more likely to seek social support and medical treatment for them...
June 23, 2017: Journal of Behavioral Medicine
https://www.readbyqxmd.com/read/28645853/anterior-pallidal-deep-brain-stimulation-for-tourette-s-syndrome-a-randomised-double-blind-controlled-trial
#11
Marie-Laure Welter, Jean-Luc Houeto, Stéphane Thobois, Benoit Bataille, Marc Guenot, Yulia Worbe, Andreas Hartmann, Virginie Czernecki, Eric Bardinet, Jerome Yelnik, Sophie Tezenas du Montcel, Yves Agid, Marie Vidailhet, Philippe Cornu, Audrey Tanguy, Solène Ansquer, Nematollah Jaafari, Emmanuel Poulet, Giulia Serra, Pierre Burbaud, Emmanuel Cuny, Bruno Aouizerate, Pierre Pollak, Stephan Chabardes, Mircea Polosan, Michel Borg, Denys Fontaine, Bruno Giordana, Sylvie Raoul, Tiphaine Rouaud, Anne Sauvaget, Isabelle Jalenques, Carine Karachi, Luc Mallet
BACKGROUND: Deep brain stimulation (DBS) has been proposed to treat patients with severe Tourette's syndrome, and open-label trials and two small double-blind trials have tested DBS of the posterior and the anterior internal globus pallidus (aGPi). We aimed to specifically assess the efficacy of aGPi DBS for severe Tourette's syndrome. METHODS: In this randomised, double-blind, controlled trial, we recruited patients aged 18-60 years with severe and medically refractory Tourette's syndrome from eight hospitals specialised in movement disorders in France...
June 20, 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28645742/gastrointestinal-stromal-tumors-gist-presenting-in-the-liver-diagnostic-prognostic-and-therapeutic-issues
#12
Natacha Joyon, Jérôme Dumortier, Aude Aline-Fardin, Caroline Caramella, Pierre-Jean Valette, Jean-Yves Blay, Jean-Yves Scoazec, Peggy Dartigues
CONTEXT: Extra-gastrointestinal stromal tumors (E-GIST) presenting in the liver are exceedingly rare and raise difficult diagnostic and therapeutic challenges. METHODS: We report on two cases of liver E-GIST with different clinical presentations. We describe their clinical and imaging features, their histopathological and molecular characteristics, their treatment and their course. RESULTS: The first case was that of a 56-year-old male presenting with a 10-cm liver mass; the initial diagnosis, made in 1986 from a biopsy sample, was leiomyosarcoma; liver transplantation was performed in 1987; no extra-hepatic tumor was found; the course was uneventful until 1999, when tumor recurrence was diagnosed along the initial biopsy route; after reevaluation of available material, the definitive pathological diagnosis was GIST; imatinib treatment resulted in major response; the patient died of end-stage kidney disease 22 years after the initial diagnosis and 9 years after tumor recurrence...
June 20, 2017: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/28645219/pullulan-microbeads-si-hpmc-hydrogel-injectable-system-for-the-sustained-delivery-of-gdf-5-and-tgf-%C3%AE-1-new-insight-into-intervertebral-disc-regenerative-medicine
#13
Nina Henry, Johann Clouet, Audrey Fragale, Louise Griveau, Claire Chédeville, Joëlle Véziers, Pierre Weiss, Jean Le Bideau, Jérôme Guicheux, Catherine Le Visage
Discogenic low back pain is considered a major health concern and no etiological treatments are today available to tackle this disease. To clinically address this issue at early stages, there is a rising interest in the stimulation of local cells by in situ injection of growth factors targeting intervertebral disc (IVD) degenerative process. Despite encouraging safety and tolerability results in clinic, growth factors efficacy may be further improved. To this end, the use of a delivery system allowing a sustained release, while protecting growth factors from degradation appears of particular interest...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28644475/post-translational-modification-of-ribosomally-synthesized-peptides-by-a-radical-sam-epimerase-in-bacillus-subtilis
#14
Alhosna Benjdia, Alain Guillot, Pauline Ruffié, Jérôme Leprince, Olivier Berteau
Ribosomally synthesized peptides are built out of L-amino acids, whereas D-amino acids are generally the hallmark of non-ribosomal synthetic processes. Here we show that the model bacterium Bacillus subtilis is able to produce a novel type of ribosomally synthesized and post-translationally modified peptide that contains D-amino acids, and which we propose to call epipeptides. We demonstrate that a two [4Fe-4S]-cluster radical S-adenosyl-L-methionine (SAM) enzyme converts L-amino acids into their D-counterparts by catalysing Cα-hydrogen-atom abstraction and using a critical cysteine residue as the hydrogen-atom donor...
July 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28644439/activation-of-cell-surface-grp78-decreases-endoplasmic-reticulum-stress-and-neuronal-death
#15
Morgane Louessard, Isabelle Bardou, Eloïse Lemarchand, Audrey M Thiebaut, Jérôme Parcq, Jérôme Leprince, Anne Terrisse, Valérie Carraro, Pierre Fafournoux, Alain Bruhat, Cyrille Orset, Denis Vivien, Carine Ali, Benoit D Roussel
The unfolded protein response (UPR) is an endoplasmic reticulum (ER) -related stress conserved pathway that aims to protect cells from being overwhelmed. However, when prolonged, UPR activation converts to a death signal, which relies on its PERK-eIF2α branch. Overactivation of the UPR has been implicated in many neurological diseases, including cerebral ischaemia. Here, by using an in vivo thromboembolic model of stroke on transgenic ER stress-reporter mice and neuronal in vitro models of ischaemia, we demonstrate that ischaemic stress leads to the deleterious activation of the PERK branch of the UPR...
June 23, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28643630/molecular-phylogeny-of-42-species-of-culicoides-diptera-ceratopogonidae-from-three-continents
#16
Denis Augot, Bruno Mathieu, Leila Hadj-Henni, Véronique Barriel, Sonia Zapata Mena, Sylvia Smolis, Darine Slama, Fano José Randrianambinintsoa, Gabriel Trueba, Matthieu Kaltenbach, Nil Rahola, Jérôme Depaquit
The genus Culicoides includes vectors of important animal diseases such as bluetongue and Schmallenberg virus (BTV and SBV). This genus includes 1300 species classified in 32 subgenera and 38 unclassified species. However, the phylogenetic relationships between different subgenera of Culicoides have never been studied. Phylogenetic analyses of 42 species belonging to 12 subgenera and 8 ungrouped species of genus Culicoides from Ecuador, France, Gabon, Madagascar and Tunisia were carried out using two molecular markers (28S rDNA D1 and D2 domains and COI mtDNA)...
2017: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/28643621/linoleic-acid-%C3%AE-linolenic-acid-and-enterolactone-affect-lipid-oxidation-and-expression-of-lipid-metabolism-and-antioxidant-related-genes-in-hepatic-tissue-of-dairy-cows
#17
Émilie Fortin, Richard Blouin, Jérôme Lapointe, Hélène V Petit, Marie-France Palin
Although beneficial effects have been attributed to PUFA supplementation in high-yielding dairy cows, diets rich in PUFA may also increase oxidative stress in tissues such as the liver. To fully exploit the health benefits of PUFA, we believe that the addition of natural antioxidants could help in preventing oxidative damage. Using an in vitro precision-cut liver slices (PCLS) tissue culture system, we investigated the effects of different linoleic acid (LA, n-6):α-linolenic acid (ALA, n-3) ratios (LA:ALA ratio of 4, LA:ALA ratio of 15 and LA:ALA ratio of 25) in the presence or absence of the antioxidant enterolactone (ENL) on (1) the mRNA abundance of genes with key roles in hepatic lipid metabolism, oxidative stress response and inflammatory processes, (2) oxidative damages to lipids and proteins and (3) superoxide dismutase activity in early-lactating dairy cows...
May 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28643464/adiponectin-isoform-patterns-in-ethnic-specific-adipoq-mutation-carriers-the-iras-family-study
#18
Keri L Tabb, Chuan Gao, Pamela J Hicks, Gregory A Hawkins, Jerome I Rotter, Yii-Der Ida Chen, Xiuqing Guo, Jill M Norris, Carlos Lorenzo, Barry I Freedman, Donald W Bowden, Nicholette D Palmer
OBJECTIVE: Adiponectin is found in human serum in three groups of multimers (high molecular weight [HMW], medium molecular weight [MMW], and low molecular weight [LMW]). Two ethnic-specific variants in ADIPOQ, G45R (Hispanic-Americans) and R55C (African-Americans), were previously reported. Although carriers of both variants had mean adiponectin levels ≤ 20% of those of noncarriers, they were not clinically different from noncarriers. To compare carriers of both variants and noncarriers, relative quantification of adiponectin isoforms to total adiponectin was performed on serum samples...
June 23, 2017: Obesity
https://www.readbyqxmd.com/read/28642669/concordance-for-curve-type-in-idiopathic-scoliosis-among-family-members
#19
Clarissa Miranda Carneiro de Albuquerque Olbertz, Jérôme Sales de Gauzy, Paulo Cezar Vidal Carneiro de Albuquerque, Frank Accadbled, Paula Eduarda Miranda Carneiro de Albuquerque, José Lamartine de Andrade Aguiar
OBJECTIVE: To evaluate the concordance for the curve pattern, side and levels of the superior apical vertebrae, apex and inferior apical vertebrae of curves in patients and their relatives with idiopathic scoliosis. METHODS: Concordance according to the Lenke classification for curve pattern, side and levels of the superior apical vertebrae, apex and inferior apical vertebrae were evaluated comparative and prospectively in 243 pairs of patients and respective relatives with idiopathic scoliosis...
May 2017: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28642485/sphingosine-1-phosphate-treatment-can-ameliorate-microvascular-leakage-caused-by-combined-alcohol-intoxication-and-hemorrhagic-shock
#20
Travis M Doggett, Natascha G Alves, Sarah Y Yuan, Jerome W Breslin
Fluid resuscitation following hemorrhagic shock is often problematic, with development of prolonged hypotension and edema. In addition, many trauma patients are also intoxicated, which generally worsens outcomes. We directly investigated how alcohol intoxication impacts hemorrhagic shock and resuscitation-induced microvascular leakage using a rat model with intravital microscopic imaging. We also tested the hypothesis that an endothelial barrier-protective bioactive lipid, sphingosine-1-phosphate (S1P), could ameliorate the microvascular leakage following alcohol intoxication plus hemorrhagic shock and resuscitation...
June 22, 2017: Scientific Reports
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