Read by QxMD icon Read


Delphine Devillers, Rémy Buzier, Adeline Charriau, Gilles Guibaud
Elution of Chelex® binding layers, commonly used for the diffusive gradients in thin films technique (DGT), is recognized as the most important contributor to the uncertainty of DGT measurements. Limiting uncertainty requires the use of optimized procedures and suitable elution recoveries (f e ). This work therefore investigated elution robustness to propose improved strategies. A wide range of conditions were investigated for the main elution parameters (Chelex® particle size, elution time, Chelex® loading, and eluent concentration and volume) on Al(III), Cd(II), Co(II), Cr(III), Cu(II), Ni(II), Pb(II), and Zn(II)...
October 12, 2017: Analytical and Bioanalytical Chemistry
Simon Aldridge, Alexa Caise, Joseph Abdalla, Remi Tirfoin, Alison Edwards
Reactions of the β-diketiminate stabilized gallium dihydride (Nacnac)DippGaH2 with chelating Ir(I) bis(phosphine) precursors under an H2 atmosphere are shown to provide a simple route to Ir(V) complexes stabilized by strongly σ-donating hydrides and the carbene-like (Nacnac)DippGa donor. Characterization of these systems as seven-coordinate Ir(V) tetrahydride species is supported by single crystal X-ray and neutron diffraction, and by T1 NMR measurements. By contrast, related systems featuring more sterically demanding (non-chelating) ancillary ligands are better described in terms of a bis(hydride) dihydrogen [L3Ir(H)2(H2)]+ formulation and a formal Ir(III) oxidation state...
October 10, 2017: Chemistry: a European Journal
Alix Augustin, Steven Le Gouill, Rémy Gressin, Aurélie Bertaut, Alain Monnereau, Anne-Sophie Woronoff, Brigitte Trétarre, Patricia Delafosse, Xavier Troussard, Anne Moreau, Olivier Hermine, Marc Maynadié
PURPOSE: Mantle cell lymphoma (MCL) is a rare non-Hodgkin's lymphoma entity with a poor prognosis. Therapeutic advances have improved the survival of patients enrolled in clinical trials; however, their impact on patients outside clinical trials remains unclear. In this work, we compared patient outcome inside and outside clinical trials. METHODS: We identified MCL patients recorded in six French population-based registries between 2008 and 2012 to perform a comparison with patients enrolled in two prospective multicenter MCL clinical trials conducted by the LYSA group during the same period...
October 11, 2017: Journal of Cancer Research and Clinical Oncology
Rebecca L Williamson, Karine Laulagnier, André Miguel Miranda, Marty A Fernandez, Michael S Wolfe, Rémy Sadoul, Gilbert Di Paolo
Amyloid plaques, a neuropathological hallmark 1 of Alzheimer's disease (AD), are largely 2 composed of amyloid beta (Aβ) peptide, derived 3 from cleavage of amyloid precursor protein 4 (APP) by β- and γ-secretases. The endosome is 5 increasingly recognized as an important 6 crossroad for APP and these secretases, with 7 major implications for APP processing and 8 amyloidogenesis. Among various 9 posttranslational modifications affecting APP 10 accumulation, ubiquitination of cytodomain 11 lysines may represent a key signal controlling 12 APP endosomal sorting...
October 11, 2017: Journal of Biological Chemistry
Anthony Macri, Amélie Pavard, Rémy Versace
This study investigates the effects of emotion on the integration mechanism which binds together the components of an event and the relations between these components and encodes them within a memory trace [Versace, R., Vallet, G. T., Riou, B., Lesourd, M., Labeye, É, & Brunel, L. (2014). Act-In: An integrated view of memory mechanisms. Journal of Cognitive Psychology, 26(3), 280-306. doi: 10.1080/20445911.2014.892113 ]. Based on the literature, the authors argue that, in a memory task, contextual emotion could strengthen the integration mechanism and, more specifically, the relations between a target item and its contextual features...
October 11, 2017: Cognition & Emotion
John T Leppert, Remy W Lamberts, I-Chun Thomas, Benjamin I Chung, Geoffrey A Sonn, Eila C Skinner, Todd H Wagner, Glenn M Chertow, James D Brooks
The comparative effectiveness of partial nephrectomy versus radical nephrectomy to preserve kidney function has not been well established. We determined the risk of clinically significant (stage 4 and higher) CKD after radical or partial nephrectomy among veterans treated for kidney cancer in the Veterans Health Administration (2001-2013). Among patients with preoperative eGFR≥30 ml/min per 1.73 m(2), the incidence of CKD stage 4 or higher after radical (n=9759) or partial nephrectomy (n=4370) was 7.9% overall...
October 10, 2017: Journal of the American Society of Nephrology: JASN
Simone Cagno, Dag Anders Brede, Gert Nuyts, Frederik Vanmeert, Alexandra Pacureanu, Remi Tucoulou, Peter Cloetens, Gerald Falkenberg, Koen Janssens, Brit Salbu, Ole Christian Lind
Synchrotron radiation phase contrast nano-CT and (2D and 3D) nano-XRF were used to investigate the internal distribution of engineered Co nanoparticles in exposed individuals of the nematode Caenorhabiditis elegans. Whole nematodes and selected tissues and organs were 3D rendered: anatomical 3D renderings with 50 nm voxel size enabled the visualization of 50-200 nm sized, spherical nanoparticle aggregates within intact C. elegans. A 20 x 37 nm2 high-brilliance beam was employed to obtain XRF elemental distribution maps of entire nematodes or anatomical details such as embryos, which could be compared with the CT data...
October 10, 2017: Analytical Chemistry
Marie Daugan, Remi Noe, Wolf Herman Fridman, Catherine Sautes-Fridman, Lubka T Roumenina
The complement system is a key component of the innate immunity, playing a role in pathogen elimination and in host homeostasis. The complement system has been considered for long time as an anti-tumoral element. However, recent studies showed a pro-tumoral effect of complement and particularly of the anaphylatoxines C3a and C5a in a large variety of tumor types. Complement proteins act on different levels of tumor progression, affecting the tumor cells, the angiogenesis and the immune microenvironment. The impact of the complement system on tumor progression seems to be cancer type-dependent and this has to be taken into account in the establishment of potential biomarkers and development of therapeutic strategies...
October 2017: Médecine Sciences: M/S
Remi Valois, Yohann Cousquer, Myriam Schmutz, Alexandre Pryet, Célestine Delbart, Alain Dupuy
Characterizing the interactions between streams and aquifers is a major challenge in hydrology. Electrical self-potential (SP) is sensitive to groundwater flow through the electrokinetic effect, which is proportional to Darcy velocity. SP surveys have been extensively used for the characterization of seepage flow in a variety of contexts. But to our knowledge, a model coupling SP and groundwater flow has never been implemented for the study of stream-aquifer interactions. To address the issue, we first implemented a two-dimensional model to a synthetic stream-aquifer cross section...
October 9, 2017: Ground Water
Lise Allard, Theresa Kwon, Saoussen Krid, Justine Bacchetta, Arnaud Garnier, Robert Novo, Georges Deschenes, Rémi Salomon, Gwenaëlle Roussey, Emma Allain-Launay
Background: Primary focal segmental glomerulosclerosis (FSGS) frequently recurs after kidney transplantation (KTx) in children. This can lead to delayed graft loss. As the management of children with recurrent FSGS is not well established, apheresis strategies could be a cornerstone to control the disease. Immunoadsorption (IA) is a recent apheresis therapy. There have been few studies examining IA in this setting. We report the results of IA for management of recurrent FSGS after KTx in children in France...
July 28, 2017: Nephrology, Dialysis, Transplantation
Rémy B Teponno, Sara R Noumeur, Soleiman E Helaly, Stephan Hüttel, Daoud Harzallah, Marc Stadler
Extracts from an endophytic fungus isolated from the roots of the Algerian plant Globularia alypum showed prominent antimicrobial activity in a screening for novel antibiotics. The producer organism was identified as Dendrothyrium variisporum by means of morphological studies and molecular phylogenetic methods. Studies on the secondary metabolite production of this strain in various culture media revealed that the major components from shake flasks were massarilactones D (1) and H (2) as well as two new furanone derivatives for which we propose the trivial names (5S)-cis-gregatin B (3) and graminin D (4)...
October 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Hervé Hyvernat, Denis Doyen, Rémy Barel, Michel Kaidomar, Bernard Goubaux, Christian Pradier, Patricia Panaïa-Ferrari, Jean Dellamonica, Gilles Bernardin
PURPOSE: We recently published a comparison of two hydrocortisone dosage regimens in patients with septic shock. We compare the results conferred by the two regimens as a function of the response to cosyntropin stimulation test (CST). METHOD: Patients with septic shock were treated by one of two hydrocortisone regimens: either a 50-mg intravenous bolus every six hours during seven days (200 mg group; n = 49), or a 100-mg initial bolus followed by a continuous infusion of 300 mg daily for five days (300 mg group; n = 50)...
October 4, 2017: Shock
Caroline Fontana, Anaïs Kirsch, Carole Seidel, Léa Marpeaux, Christian Darne, Laurent Gaté, Aurélie Remy, Yves Guichard
Synthetic amorphous silica nanoparticles (SAS) are among the most widely produced and used nanomaterials, but little is known about their carcinogenic potential. This study aims to evaluate the ability of four different SAS, two precipitated, NM-200 and NM-201, and two pyrogenic, NM-202 and NM-203, to induce the transformation process. For this, we used the recently developed in vitro Bhas 42 cell transformation assay (CTA). The genome of the transgenic Bhas 42 cells contains several copies of the v-Ha-ras gene, making them particularly sensitive to tumor-promoter agents...
November 2017: Mutation Research
Remy Gavard, David Rossell, Simon E F Spencer, Mark P Barrow
Fourier transform ion cyclotron resonance mass spectrometry affords the resolving power to determine an unprecedented number of components in complex mixtures, such as petroleum. The software tools required to also analyze these data struggle to keep pace with advancing instrument capabilities and increasing quantities of data, particularly in terms of combining information efficiently across multiple replicates. Improved confidence in data and the use of replicates is particularly important where strategic decisions will be based upon the analysis...
October 6, 2017: Analytical Chemistry
Ignacio Piquero-Zulaica, Jorge Lobo-Checa, Ali Sadeghi, Zakaria M Abd El-Fattah, Chikahiko Mitsui, Toshihiro Okamoto, Rémy Pawlak, Tobias Meier, Andrés Arnau, J Enrique Ortega, Jun Takeya, Stefan Goedecker, Ernst Meyer, Shigeki Kawai
Quantum dots are known to confine electrons within their structure. Whenever they periodically aggregate into arrays and cooperative interactions arise, novel quantum properties suitable for technological applications show up. Control over the potential barriers existing between neighboring quantum dots is therefore essential to alter their mutual crosstalk. Here we show that precise engineering of the barrier width can be experimentally achieved on surfaces by a single atom substitution in a haloaromatic compound, which in turn tunes the confinement properties through the degree of quantum dot intercoupling...
October 5, 2017: Nature Communications
Remi Allio, Stefano Donega, Nicolas Galtier, Benoit Nabholz
It is commonly assumed that mitochondrial DNA (mtDNA) evolves at a faster rate than nuclear DNA (nuDNA) in animals. This has contributed to the popularity of mtDNA as a molecular marker in evolutionary studies. Analyzing 121 multilocus data sets and four phylogenomic data sets encompassing 4,676 species of animals, we demonstrate that the ratio of mitochondrial over nuclear mutation rate is highly variable among animal taxa. In nonvertebrates, such as insects and arachnids, the ratio of mtDNA over nuDNA mutation rate varies between 2 and 6, whereas it is above 20, on average, in vertebrates such as scaled reptiles and birds...
July 16, 2017: Molecular Biology and Evolution
Alexandre Vallée, Yves Lecarpentier, Rémy Guillevin, Jean-Noël Vallée
Alzheimer's disease (AD) is a neurodegenerative disease, in which the primary etiology remains unknown. AD presents amyloid beta (Aβ) protein aggregation and neurofibrillary plaque deposits. AD shows oxidative stress and chronic inflammation. In AD, canonical Wingless-Int (Wnt)/β-catenin pathway is downregulated, whereas peroxisome proliferator-activated receptor γ (PPARγ) is increased. Downregulation of Wnt/β-catenin, through activation of glycogen synthase kinase-3β (GSK-3β) by Aβ, and inactivation of phosphatidylinositol 3-kinase/Akt signaling involve oxidative stress in AD...
October 1, 2017: Acta Biochimica et Biophysica Sinica
Christine Bellanné-Chantelot, Matthieu Mosca, Caroline Marty, Rémi Favier, William Vainchenker, Isabelle Plo
The molecular basis of hereditary thrombocytosis is germline mutations affecting the thrombopoietin (TPO)/TPO receptor (MPL)/JAK2 signaling axis. Here, we report one family presenting two cases with a mild thrombocytosis. By sequencing JAK2 and MPL coding exons, we identified a germline MPL R102P heterozygous mutation in the proband and his daughter. Concomitantly, we detected high TPO levels in the serum of these two patients. The mutation was not found in three other unaffected cases from the family except in another proband's daughter who did not present thrombocytosis but had a high TPO level...
2017: Frontiers in Endocrinology
Djihad Bencherit, Sylvie Remy, Yves Le Vern, Tereza Vychodil, Luca D Bertzbach, Benedikt B Kaufer, Caroline Denesvre, Laëtitia Trapp-Fragnet
Marek's disease virus (MDV) is a highly contagious alphaherpesvirus that infects chickens and causes a deadly neoplastic disease. We previously demonstrated that MDV infection arrests cells in S-phase and that the tegument protein VP22 plays a major role in this process. In addition, expression of VP22 induces double strand breaks (DSB) in the cellular DNA, suggesting that DNA damage and the associated cellular response might be favorable for the MDV lifecycle. Here, we addressed the role of DNA damage in MDV replication and pathogenesis...
October 4, 2017: Journal of Virology
Remi Adelaiye-Ogala, Justin Budka, Nur P Damayanti, Justine Arrington, Mary W Ferris, Chuan-Chih Hsu, Sreenivasulu Chintala, Ashley R Orillion, Kiersten Marie Miles, Li Shen, May Elbanna, Eric Ciamporcero, Sreevani Arisa, Piergiorgio Pettazzoni, Giulio F Draetta, Mukund Seshadri, Bradley A Hancock, Milan Radovich, Janaiah Kota, Michael Buck, Heike Keilhack, Brian P McCarthy, Scott A Persohn, Paul R Territo, Yong Zang, Joseph Irudayaraj, Andy W Tao, Peter Hollenhorst, Roberto Pili
Acquired and intrinsic resistance to receptor tyrosine kinase inhibitors (RTKi) represent a major hurdle in improving the management of clear cell renal cell carcinoma (ccRCC). Recent reports suggest that drug resistance is driven by tumor adaptation via epigenetic mechanisms that activate alternative survival pathways. The histone methyl transferase EZH2 is frequently altered in many cancers including ccRCC. To evaluate its role in ccRCC resistance to RTKi, we established and characterized a spontaneously metastatic, patient-derived xenograft (PDX) model that is intrinsically resistant to the RTKI sunitinib but not to the VEGF therapeutic antibody bevacizumab...
October 4, 2017: Cancer Research
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"