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https://www.readbyqxmd.com/read/28816600/deciphering-the-trna-dependent-lipid-aminoacylation-systems-in-bacteria-novel-components-and-structural-advances
#1
Rachel N Fields, Hervé Roy
tRNA-dependent addition of amino acids to lipids on the outer surface of the bacterial membrane results in decreased effectiveness of antimicrobials such as cationic antimicrobial peptides (CAMPs) that target the membrane, and increased virulence of several pathogenic species. After a brief introduction to CAMPs and the various bacterial resistance mechanisms used to counteract these compounds, this review focuses on recent advances in tRNA-dependent pathways for lipid modification in bacteria. Phenotypes associated with amino acid lipid modifications and regulation of their expression will also be discussed...
August 17, 2017: RNA Biology
https://www.readbyqxmd.com/read/28814779/the-beach-protein-lrba-promotes-the-localization-of-the-heterotrimeric-g-protein-golf-to-olfactory-cilia
#2
Stefan Kurtenbach, Andreas Gießl, Siv Strömberg, Jan Kremers, Jenny Atorf, Sebastian Rasche, Eva M Neuhaus, Denis Hervé, Johann Helmut Brandstätter, Esther Asan, Hanns Hatt, Manfred W Kilimann
BEACH domain proteins are involved in membrane protein traffic and human diseases, but their molecular mechanisms are not understood. The BEACH protein LRBA has been implicated in immune response and cell proliferation, and human LRBA mutations cause severe immune deficiency. Here, we report a first functional and molecular phenotype outside the immune system of LRBA-knockout mice: compromised olfaction, manifesting in reduced electro-olfactogram response amplitude, impaired food-finding efficiency, and smaller olfactory bulbs...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28812370/rauvolfianine-a-new-antimycobacterial-glyceroglycolipid-and-other-constituents-from-rauvolfia-caffra-sond-apocynaceae
#3
Robert Ebeh Messanga, Ngono Bikobo Dominique Serge, Auguste Abouem A Zintchem, Mbabi Nyemeck Ii Norbert, Moni Ndedi Esther Del Florence, Betote Diboué Patrick Hervé, Nyegue Maximilienne Ascension, Atchadé Alex De Théodore, Pegnyemb Dieudonné Emmanuel, Bochet Christian G, Ulrich Koert
The chemical investigation of the extract of the dried leaves of Rauvolfia caffra (Sond) (synonym Rauvolfia macrophylla) (Apocynaceae) led to isolation of a new glycoside derivative, rauvolfianine (1) as well as six known compounds: oleanolic acid (2), sitosterol-3-O-β-D-glucopyranoside (3), betulinic acid (4), vellosimine (5), sarpagine (6) and D-fructofuranosyl-β-(2→1)-α-D-glucopyranoside (7). Compounds 1, 2, 3, 4 and 7 were evaluated for antitubercular activity. Compounds 1 and 2 were the most active (MIC = 7...
August 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28811874/functional-roles-of-an-engineer-species-for-coastal-benthic-invertebrates-and-demersal-fish
#4
Aurélie Chaalali, Anik Brind'Amour, Stanislas F Dubois, Hervé Le Bris
Through their tissues or activities, engineer species create, modify, or maintain habitats and alter the distribution and abundance of many plants and animals. This study investigates key ecological functions performed by an engineer species that colonizes coastal ecosystems. The gregarious tubiculous amphipod Haploops nirae is used as a biological model. According to previous studies, the habitat engineered by H. nirae (i.e., Haploops habitat) could provide food and natural shelter for several benthic species such as benthic diatoms belonging to the gender Navicula, the micrograzer Geitodoris planata, or the bivalve Polititapes virgineus...
August 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28810898/erratum-to-insights-into-the-design-and-interpretation-of-iclip-experiments
#5
Nejc Haberman, Ina Huppertz, Jan Attig, Julian König, Zhen Wang, Christian Hauer, Matthias W Hentze, Andreas E Kulozik, Hervé Le Hir, Tomaž Curk, Christopher R Sibley, Kathi Zarnack, Jernej Ule
No abstract text is available yet for this article.
August 15, 2017: Genome Biology
https://www.readbyqxmd.com/read/28808738/formaldehyde-passive-sampler-using-an-optical-chemical-sensor-how-to-limit-the-humidity-interference
#6
Jane Vignau-Laulhere, Pierre Mocho, Hervé Plaisance, Katarzyna Raulin-Woznica, Thu-Hoa Tran-Thi, Valérie Desauziers
The behaviour of a new formaldehyde diffusive sampler using an optical chemical sensor with respect to high humidity conditions is examined in controlled atmospheres. Five prototypes of the radial diffusion sampler having the same chemical sensor and different designs were tested. In addition, a set of experiments were performed on the chemical sensor to characterise its efficiency of trapping water vapour in the absence and in the presence of the reactants, Fluoral-P and formaldehyde. Differences in humidity interference between the five diffusive sampler prototypes were studied and discussed...
August 14, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28807694/reviewing-evidence-for-systematic-transcriptional-deletions-nucleotide-exchanges-and-expanded-codons-and-peptide-clusters-in-human-mitochondria
#7
REVIEW
Hervé Seligmann
Polymerization sometimes transforms sequences by (a) systematic deletions of mono-, dinucleotides after trinucleotides, or (b) 23 systematic nucleotide exchanges (9 symmetric, X<>Y, e.g. G<>T, 14 asymmetric, X > Y > Z > X, e.g. A > G > T > A), producing del- and swinger RNAs. Some peptides correspond to del- and swinger RNA translations, also according to tetracodons, codons expanded by a silent nucleotide. Here new analyzes assume different proteolytic patterns, partially alleviating false negative peptide detection biases, expanding noncanonical mitoproteome profiles...
August 11, 2017: Bio Systems
https://www.readbyqxmd.com/read/28806782/the-use-of-18f-fluoro-deoxy-glucose-positron-emission-tomography-18f-fdg-pet-as-a-non-invasive-pharmacodynamic-biomarker-to-determine-the-minimally-pharmacologically-active-dose-of-azd8835-a-novel-pi3k%C3%AE-inhibitor
#8
Juliana Maynard, Sally-Ann Emmas, Francois-Xavier Ble, Herve Barjat, Emily Lawrie, Urs Hancox, Urszula M Polanska, Alison Pritchard, Kevin Hudson
BACKGROUND: The phosphatidyl inositol 3 kinase (PI3K), AKT and mammalian target of rapamycin (mTOR) signal transduction pathway is frequently de-regulated and activated in human cancer and is an important therapeutic target. AZD8835 is a PI3K inhibitor, with selectivity against PI3K α and δ isoforms, which is currently in Phase 1 clinical trials. 18F-Fluoro-deoxy-glucose positron emission tomography (18F-FDG PET) is a non-invasive pharmacodynamic imaging biomarker that has become an integral part of drug development...
2017: PloS One
https://www.readbyqxmd.com/read/28806747/low-lamin-a-expression-in-lung-adenocarcinoma-cells-from-pleural-effusions-is-a-pejorative-factor-associated-with-high-number-of-metastatic-sites-and-poor-performance-status
#9
Elise Kaspi, Diane Frankel, Julien Guinde, Sophie Perrin, Sophie Laroumagne, Andrée Robaglia-Schlupp, Kevin Ostacolo, Karim Harhouri, Rachid Tazi-Mezalek, Joelle Micallef, Hervé Dutau, Pascale Tomasini, Annachiara De Sandre-Giovannoli, Nicolas Lévy, Pierre Cau, Philippe Astoul, Patrice Roll
The type V intermediate filament lamins are the principal components of the nuclear matrix, including the nuclear lamina. Lamins are divided into A-type and B-type, which are encoded by three genes, LMNA, LMNB1, and LMNB2. The alternative splicing of LMNA produces two major A-type lamins, lamin A and lamin C. Previous studies have suggested that lamins are involved in cancer development and progression. A-type lamins have been proposed as biomarkers for cancer diagnosis, prognosis, and/or follow-up. The aim of the present study was to investigate lamins in cancer cells from metastatic pleural effusions using immunofluorescence, western blotting, and flow cytometry...
2017: PloS One
https://www.readbyqxmd.com/read/28804479/molecular-characterization-of-arbuscular-mycorrhizal-fungi-in-an-agroforestry-system-reveals-the-predominance-of-funneliformis-spp-associated-with-colocasia-esculenta-and-pterocarpus-officinalis-adult-trees-and-seedlings
#10
Alexandre Geoffroy, Hervé Sanguin, Antoine Galiana, Amadou Bâ
Pterocarpus officinalis (Jacq.) is a leguminous forestry tree species endemic to Caribbean swamp forests. In Guadeloupe, smallholder farmers traditionally cultivate flooded taro (Colocasia esculenta) cultures under the canopy of P. officinalis stands. The role of arbuscular mycorrhizal (AM) fungi in the sustainability of this traditional agroforestry system has been suggested but the composition and distribution of AM fungi colonizing the leguminous tree and/or taro are poorly characterized. An in-depth characterization of root-associated AM fungal communities from P...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28798350/wet-tropical-climate-in-se-tibet-during-the-late-eocene
#11
Philippe Sorrel, Ines Eymard, Philippe-Herve Leloup, Gweltaz Maheo, Nicolas Olivier, Mary Sterb, Loraine Gourbet, Guocan Wang, Wu Jing, Haijian Lu, Haibing Li, Xu Yadong, Kexin Zhang, Kai Cao, Marie-Luce Chevalier, Anne Replumaz
Cenozoic climate cooling at the advent of the Eocene-Oligocene transition (EOT), ~33.7 Ma ago, was stamped in the ocean by a series of climatic events albeit the impact of this global climatic transition on terrestrial environments is still fragmentary. Yet archival constraints on Late Eocene atmospheric circulation are scarce in (tropical) monsoonal Asia, and the paucity of terrestrial records hampers a meaningful comparison of the long-term climatic trends between oceanic and continental realms. Here we report new sedimentological data from the Jianchuan basin (SE Tibet) arguing for wetter climatic conditions in monsoonal Asia at ~35...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28797619/mechanical-ventilation-weaning-protocol-improves-medical-adherence-and-results
#12
Luís Guilherme Alegretti Borges, Augusto Savi, Cassiano Teixeira, Roselaine Pinheiro de Oliveira, Marcio Luiz Ferreira De Camillis, Ricardo Wickert, Sérgio Fernando Monteiro Brodt, Túlio Frederico Tonietto, Ricardo Cremonese, Leonardo Silveira da Silva, Fernanda Gehm, Eubrando Silvestre Oliveira, Jose Herve Diel Barth, Juçara Gasparetto Macari, Cíntia Dias de Barros, Sílvia Regina Rios Vieira
INTRODUCTION: Implementation of a weaning protocol is related to better patient prognosis. However, new approaches may take several years to become the standard of care in daily practice. We conducted a prospective cohort study to investigate the effectiveness of a multifaceted strategy to implement a protocol to wean patients from mechanical ventilation (MV) and to evaluate the weaning success rate as well as practitioner adherence to the protocol. METHODS: We investigated all consecutive MV-dependent subjects admitted to a medical-surgical intensive care unit (ICU) for >24h over 7years...
July 12, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28797242/going-deeper-in-the-automated-identification-of-herbarium-specimens
#13
Jose Carranza-Rojas, Herve Goeau, Pierre Bonnet, Erick Mata-Montero, Alexis Joly
BACKGROUND: Hundreds of herbarium collections have accumulated a valuable heritage and knowledge of plants over several centuries. Recent initiatives started ambitious preservation plans to digitize this information and make it available to botanists and the general public through web portals. However, thousands of sheets are still unidentified at the species level while numerous sheets should be reviewed and updated following more recent taxonomic knowledge. These annotations and revisions require an unrealistic amount of work for botanists to carry out in a reasonable time...
August 11, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28796292/exposure-to-low-environmental-concentrations-of-manganese-lead-and-cadmium-alters-the-serotonin-system-of-blue-mussels
#14
Marc Fraser, Marlène Fortier, Delphine Foucher, Pierre-Hervé Roumier, Pauline Brousseau, Michel Fournier, Céline Surette, Cathy Vaillancourt
Serotonin plays a crucial role in mussel survival and reproduction. Although serotonin system can be affected by metals, the effects of environmental concentration of metals, such as manganese (Mn), lead (Pd), and cadmium (Cd), have never been studied in blue mussels. This study aims to determine the effects of exposure to Mn, Pb or Cd on serotonin levels, monoamine oxidase (MAO) activity, and serotonin transporter (SERT) in the blue mussel, Mytilus edulis. Mussels were exposed in vivo to increasing and environmentally relevant doses of Mn (10-1000 nM; 0...
August 10, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28794913/wolf-hirschhorn-syndrome-clinical-and-genetic-data-from-a-first-case-diagnosed-in-central-africa
#15
Sébastien Mbuyi-Musanzayi, Aimé Lumaka, Toni Lubala Kasole, Erick Kasamba Ilunga, Bienvenu Yogolelo Asani, Prosper Lukusa Tshilobo, Prosper Kalenga Muenze, Hervé Reychler, François Tshilombo Katombe, Koenraad Devriendt
Wolf-Hirschhorn syndrome (WHS) is a multiple congenital anomaly-intellectual disability syndrome caused by a deletion involving chromosome 4p16.3. We report clinical and genetic findings of the first WHS patient diagnosed in central Africa. This boy who presented with cleft palate, microcephaly, severe growth delay, and intellectual disability was 12 years old. Typical craniofacial features were present, though the characteristic "Greek helmet" appearance of the nose was less evident, probably reflecting a variable expression related to the genetic background...
September 2017: Journal of Pediatric Genetics
https://www.readbyqxmd.com/read/28794452/the-anti-influenza-m2e-antibody-response-is-promoted-by-xcr1-targeting-in-pig-skin
#16
Charlotte Deloizy, Even Fossum, Christophe Barnier-Quer, Céline Urien, Tiphany Chrun, Audrey Duval, Maelle Codjovi, Edwige Bouguyon, Pauline Maisonnasse, Pierre-Louis Hervé, Céline Barc, Olivier Boulesteix, Jérémy Pezant, Christophe Chevalier, Nicolas Collin, Marc Dalod, Bjarne Bogen, Nicolas Bertho, Isabelle Schwartz-Cornil
XCR1 is selectively expressed on a conventional dendritic cell subset, the cDC1 subset, through phylogenetically distant species. The outcome of antigen-targeting to XCR1 may therefore be similar across species, permitting the translation of results from experimental models to human and veterinary applications. Here we evaluated in pigs the immunogenicity of bivalent protein structures made of XCL1 fused to the external portion of the influenza virus M2 proton pump, which is conserved through strains and a candidate for universal influenza vaccines...
August 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28794176/molecular-tests-that-target-the-rtx-locus-do-not-distinguish-between-kingella-kingae-and-the-recently-described-kingella-negevensis-species
#17
Nawal El Houmami, Janek Bzdrenga, Guillaume André Durand, Philippe Minodier, Hervé Seligmann, Elsa Prudent, Sofiane Bakour, Stéphane Bonacorsi, Didier Raoult, Pablo Yagupsky, Pierre-Edouard Fournier
Kingella kingae is an important invasive pathogen in early childhood. The organism elaborates a RTX toxin presumably restricted to this species. Consequently, real-time PCR (qPCR) assays targeting the RTX locus have been developed in recent years and are gaining increasing use for the molecular diagnosis of K. kingae infections. However, this study shows that Kingella negevensis, a Kingella species newly identified in young children, harbors an identical Kingella RTX locus, raising the question whether K. negevensis could be misdiagnosed as K...
August 9, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28792965/method-to-evaluate-the-noise-of-3d-intra-oral-scanner
#18
Alban Desoutter, Osama Yusuf Solieman, Gérard Subsol, Hervé Tassery, Frédéric Cuisinier, Michel Fages
In dentistry, 3D intra-oral scanners are gaining increasing popularity essentially for the production of dental prostheses. However, there is no normalized procedure to evaluate their basic performance and enable comparisons among intra-oral scanners. The noise value highlights the trueness of a 3D intra-oral scanner and its capacity to plan prosthesis with efficient clinical precision. The aim of the present study is to develop a reproducible methodology for determining the noise of an intra-oral scanner. To this aim, and as a reference, an ultra-flat and ultra-smooth alumina wafer is used as a blank test...
2017: PloS One
https://www.readbyqxmd.com/read/28792894/high-quality-plane-wave-compounding-using-convolutional-neural-networks
#19
Maxime Gasse, Fabien Millioz, Emmanuel Roux, Damien Garcia, Herve Liebgott, Denis Friboulet
Single plane wave (PW) imaging produces ultrasound (US) images of poor quality at high frame rates (ultrafast). High-quality PW imaging usually relies on the coherent compounding of several successive steered emissions (typically more than ten), which in turn results in a decreased frame rate. We propose a new strategy to reduce the number of emitted PWs by learning a compounding operation from data, i.e. by training a convolutional neural network (CNN) to reconstruct high quality images using a small number of transmissions...
August 7, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28792656/amygdala-and-regional-volumes-in-treatment-resistant-versus-nontreatment-resistant-depression-patients
#20
Anca-Larisa Sandu, Eric Artiges, André Galinowski, Thierry Gallarda, Frank Bellivier, Hervé Lemaitre, Bernard Granger, Damien Ringuenet, Eleni T Tzavara, Jean-Luc Martinot, Marie-Laure Paillère Martinot
BACKGROUND: Although treatment-resistant and nontreatment-resistant depressed patients show structural brain anomalies relative to healthy controls, the difference in regional volumetry between these two groups remains undocumented. METHODS: A whole-brain voxel-based morphometry (VBM) analysis of regional volumes was performed in 125 participants' magnetic resonance images obtained on a 1.5 Tesla scanner; 41 had treatment-resistant depression (TRD), 40 nontreatment-resistant depression (non-TRD), and 44 were healthy controls...
August 9, 2017: Depression and Anxiety
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