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https://www.readbyqxmd.com/read/28095445/cytosolic-rna-dna-duplexes-generated-by-endogenous-reverse-transcriptase-activity-as-autonomous-inducers-of-skin-inflammation-in-psoriasis
#1
Jean-Pierre Molès, Anthony Griez, Jean-Jacques Guilhou, Céline Girard, Nicolas Nagot, Philippe Van de Perre, Pierre Dujols
Psoriasis is a chronic skin disease of unknown ætiology. Recent studies suggested that a large amount of cytosolic DNA (cyDNA) in keratinocytes is breaking keratinocytes DNA tolerance and promotes self-sustained inflammation in the psoriatic lesion. We investigated the origin of this cyDNA. We show that, amongst all the possible DNA structures, the cyDNA could be present as RNA:DNA duplexes in keratinocytes. We further show that endogenous reverse transcriptase activities generate such duplexes and consequently activate the production of Th1-inflammatory cytokines...
2017: PloS One
https://www.readbyqxmd.com/read/28087802/cytochrome-c-peroxidase-ccp-is-a-molecular-determinant-of-the-oxidative-stress-response-in-the-extreme-acidophilic-leptospirillum-sp-cf-1
#2
C Zapata, B Paillavil, R Chávez, P Álamos, G Levicán
Bioleaching processes are used to recover metals from sulfidic ores. Biofilm formation on ores is important for bioleaching because the attached microorganisms start the leaching process by concentrating ferric ions in the extracellular matrix. It has been shown that hydrogen peroxide is spontaneously generated on the surface of ores and that it negatively influences the growth and activity of microorganisms. However, the mechanism by which bioleaching microorganisms tolerate exogenous H2O2 as an adaptive trait remains elusive...
January 12, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28070293/functional-community-structure-of-african-monodominant-gilbertiodendron-dewevrei-forest-influenced-by-local-environmental-filtering
#3
Elizabeth Kearsley, Hans Verbeeck, Koen Hufkens, Frederik Van de Perre, Sebastian Doetterl, Geert Baert, Hans Beeckman, Pascal Boeckx, Dries Huygens
Monodominant patches of forest dominated by Gilbertiodendron dewevrei are commonly found in central African tropical forests, alongside forests with high species diversity. Although these forests are generally found sparsely distributed along rivers, their occurrence is not thought to be (clearly) driven by edaphic conditions but rather by trait combinations of G. dewevrei that aid in achieving monodominance. Functional community structure between these monodominant and mixed forests has, however, not yet been compared...
January 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28069472/semi-quantitative-real-time-pcr-a-useful-approach-to-identify-persons-with-low-replicative-chronic-hepatitis-b
#4
Joany Castéra-Guy, Pierre-Alain Rubbo, Dramane Kania, Maud Lemoine, Philippe Van de Perre, Edouard Tuaillon
Antiviral therapy can be avoided during the low replicative phase of chronic Hepatitis B virus (HBV) infection which is characterized notably by HBV DNA concentration below 2000 IU/ml. Simplified diagnostic tests can improve access to HBV DNA monitoring in resource-limited settings. The capacity of a new semi-quantitative real-time PCR approach based on sample-to-standard relative detection of the target to discriminate samples with HBV DNA levels above or below the clinical threshold of 2000 IU/ml was compared to a quantitative assay (Roche CobasAmpliPrep/CobasTaqMan HBV Test v2...
January 6, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28054240/risk-of-adverse-outcomes-for-older-people-with-dementia-prescribed-antipsychotic-medication-a-population-based-e-cohort-study
#5
Michael Dennis, Laura Shine, Ann John, Amanda Marchant, Joanna McGregor, Ronan A Lyons, Sinead Brophy
INTRODUCTION: Over recent years there has been growing evidence of increased risk of mortality associated with antipsychotic use in older people with dementia. Although this concern combined with limited evidence of efficacy has informed guidelines restricting antipsychotic prescription in this population, the use of antipsycotics remains common. Many published studies only report short-term outcomes, are restricted to examining mortality and stroke risk or have other limitations. The aim of this study was to assess adverse outcomes associated with the use of antipsychotics in older people living with dementia in Wales (UK)...
January 4, 2017: Neurology and Therapy
https://www.readbyqxmd.com/read/28019697/mixture-toxicity-of-phostebupirim-and-cyfluthrin-species-specific-responses
#6
Chloé de Perre, Tracye M Murphy, Michael J Lydy
Currently, the potential impact of insecticide mixtures to non-target organisms is still largely unknown, and needs additional studies. Therefore, the present study investigated the mixture toxicity of the organophosphate insecticide phostebupirim and pyrethroid insecticide cyfluthrin using four non-target species including Daphnia magna, Hyalella azteca, Pimephales promelas (fathead minnow), and Danio rerio (zebrafish). For each species, the toxicity of equipotent mixtures was compared to the expected toxicity estimated using the independent action (IA) and concentration addition (CA) models...
December 26, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27935957/intracellular-zn-ii-intoxication-leads-to-dysregulation-of-the-perr-regulon-resulting-in-heme-toxicity-in-bacillus-subtilis
#7
Pete Chandrangsu, John D Helmann
Transition metal ions (Zn(II), Cu(II)/(I), Fe(III)/(II), Mn(II)) are essential for life and participate in a wide range of biological functions. Cellular Zn(II) levels must be high enough to ensure that it can perform its essential roles. Yet, since Zn(II) binds to ligands with high avidity, excess Zn(II) can lead to protein mismetallation. The major targets of mismetallation, and the underlying causes of Zn(II) intoxication, are not well understood. Here, we use a forward genetic selection to identify targets of Zn(II) toxicity...
December 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27920297/role-of-ribonucleotide-reductase-on-bacillus-subtilis-stress-associated-mutagenesis
#8
Karla Viridiana Castro-Cerritos, Ronald E Yasbin, Eduardo A Robleto, Mario Pedraza-Reyes
: The Gram-positive microorganism Bacillus subtilis relies on a single class Ib ribonucleotide reductase (RNR) to generate 2' -deoxyribonucleotides (dNDPs) for DNA replication and repair. In this work, we investigated the influence of RNR levels on B. subtilis stationary-phase-associated mutagenesis (SPM). Since RNR is essential in this bacterium, we engineered a conditional mutant in the strain B. subtilis YB955 (hisC952, metB5, leu427) in which expression of the nrdEF operon was modulated by isopropyl-β-D-thiogalactopyranoside (IPTG)...
December 5, 2016: Journal of Bacteriology
https://www.readbyqxmd.com/read/27897405/premorbid-obesity-but-not-nutrition-prevents-critical-illness-induced-muscle-wasting-and-weakness
#9
Chloë Goossens, Mirna Bastos Marques, Sarah Derde, Sarah Vander Perre, Thomas Dufour, Steven E Thiessen, Fabian Güiza, Thomas Janssens, Greet Hermans, Ilse Vanhorebeek, Katrien De Bock, Greet Van den Berghe, Lies Langouche
BACKGROUND: The 'obesity paradox' of critical illness refers to better survival with a higher body mass index. We hypothesized that fat mobilized from excess adipose tissue during critical illness provides energy more efficiently than exogenous macronutrients and could prevent lean tissue wasting. METHODS: In lean and premorbidly obese mice, the effect of 5 days of sepsis-induced critical illness on body weight and composition, muscle wasting, and weakness was assessed, each with fasting and parenteral feeding...
July 20, 2016: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/27895016/are-prophylactic-and-therapeutic-target-concentrations-different-the-case-of-lopinavir-ritonavir-or-lamivudine-administered-to-infants-for-the-prevention-of-mother-to-child-hiv-1-transmission-during-breastfeeding
#10
Frantz Foissac, Jörn Blume, Jean-Marc Tréluyer, Thorkild Tylleskär, Chipepo Kankasa, Nicolas Meda, James K Tumwine, Mandisa Singata-Madliki, Kim Harper, Silvia M Illamola, Naïm Bouazza, Nicolas Nagot, Philippe Van de Perre, Stéphane Blanche, Déborah Hirt
The ANRS 12174 trial assessed the efficacy and tolerance of LPV/r versus 3TC prophylaxis administered to breastfed infants, whose HIV-infected mothers were not on ART. In this sub-study, we assessed LPV/r and 3TC pharmacokinetics to evaluate the percentage of infants with therapeutic plasma concentrations and to discuss these data in the context of a prophylactic treatment. Infants from the South African trial site underwent blood sampling for pharmacokinetic study at week 6, 26 and 38 of life. We applied a Bayesian approach to derive the 3TC and LPV pharmacokinetic parameters based on previously published pharmacokinetic models for HIV-infected children...
November 28, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27883170/macvia-lr-fighting-chronic-diseases-for-active-and-healthy-ageing-in-languedoc-roussillon-a-success-story-of-the-european-innovation-partnership-on-active-and-healthy-ageing
#11
J Bousquet, R Bourret, T Camuzat, P Augé, J Bringer, M Noguès, O Jonquet, J E de la Coussaye, J Ankri, M Cesari, O Guérin, B Vellas, H Blain, S Arnavielhe, A Avignon, B Combe, G Canovas, C Daien, G Dray, A Dupeyron, C Jeandel, I Laffont, D Laune, C Marion, E Pastor, J Y Pélissier, B Galan, J Reynes, J C Reuzeau, A Bedbrook, S Granier, P A Adnet, M Amouyal, B Alomène, P L Bernard, C Berr, D Caimmi, P G Claret, D J Costa, J P Cristol, P Fesler, D Hève, J Millot-Keurinck, D Morquin, G Ninot, M C Picot, N Raffort, F Roubille, A Sultan, J Touchon, V Attalin, C Azevedo, M Badin, K Bakhti, B Bardy, M P Battesti, X Bobia, C Boegner, S Boichot, H Y Bonnin, S Bouly, C Boubakri, J L Bourrain, G Bourrel, V Bouix, V Bruguière, S Cade, W Camu, V Carre, G Cavalli, G Cayla, R Chiron, P Coignard, F Coroian, P Costa, J Cottalorda, B Coulet, A L Coupet, M C Courrouy-Michel, P Courtet, V Cros, F Cuisinier, M Danko, P Dauenhauer, M Dauzat, M David, J M Davy, D Delignières, P Demoly, J Desplan, P Dujols, G Dupeyron, O Engberink, M Enjalbert, C Fattal, J Fernandes, M Fouletier, P Fraisse, P Gabrion, M Gellerat-Rogier, A Gelis, C Genis, N Giraudeau, A Y Goucham, F Gouzi, F Gressard, J C Gris, B Guillot, D Guiraud, V Handweiler, M Hayot, C Hérisson, C Heroum, D Hoa, S Jacquemin, S Jaber, D Jakovenko, C Jorgensen, P Kouyoudjian, R Lamoureux, L Landreau, M Lapierre, D Larrey, C Laurent, M S Léglise, J M Lemaitre, A Le Quellec, F Leclercq, S Lehmann, B Lognos, Cj M Lussert, A Makinson, K Mandrick, P Mares, P Martin-Gousset, A Matheron, G Mathieu, M Meissonnier, G Mercier, P Messner, C Meunier, M Mondain, R Morales, J Morel, D Mottet, P Nérin, P Nicolas, F Nouvel, D Paccard, G Pandraud, M P Pasdelou, J L Pasquié, K Patte, S Perrey, Y M Pers, F Portejoie, J L E Pujol, X Quantin, I Quéré, S Ramdani, J Ribstein, I Rédini-Martinez, S Richard, K Ritchie, J P Riso, F Rivier, J M Robine, C Rolland, E Royère, D Sablot, J L Savy, L Schifano, P Senesse, R Sicard, Y Stephan, D Strubel, G Tallon, M Tanfin, H Tassery, I Tavares, K Torre, V Tribout, A Uziel, P Van de Perre, F Venail, C Vergne-Richard, G Vergotte, L Vian, F Vialla, F Viart, M Villain, E Viollet, M Ychou, J Mercier
The Région Languedoc Roussillon is the umbrella organisation for an interconnected and integrated project on active and healthy ageing (AHA). It covers the 3 pillars of the European Innovation Partnership on Active and Healthy Ageing (EIP on AHA): (A) Prevention and health promotion, (B) Care and cure, (C) and (D) Active and independent living of elderly people. All sub-activities (poly-pharmacy, falls prevention initiative, prevention of frailty, chronic respiratory diseases, chronic diseases with multimorbidities, chronic infectious diseases, active and independent living and disability) have been included in MACVIA-LR which has a strong political commitment and involves all stakeholders (public, private, patients, policy makers) including CARSAT-LR and the Eurobiomed cluster...
2016: Journal of Frailty & Aging
https://www.readbyqxmd.com/read/27852856/zika-virus-efficiently-replicates-in-human-retinal-pigment-epithelium-and-disturbs-its-permeability
#12
Sara Salinas, Nejla Erkilic, Krishna Damodar, Jean-Pierre Molès, Chantal Fournier-Wirth, Philippe Van de Perre, Vasiliki Kalatzis, Yannick Simonin
Recently, the Flavivirus Zika virus (ZIKV) has rapidly spread in the Americas and in the Caribbean islands.….
November 16, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27835754/automatic-phonological-activation-during-visual-word-recognition-in-bilingual-children-a-cross-language-masked-priming-study-in-grades-3-and-5
#13
Karinne Sauval, Laetitia Perre, Lynne G Duncan, Eva Marinus, Séverine Casalis
Previous masked priming research has shown automatic phonological activation during visual word recognition in monolingual skilled adult readers. Activation also occurs across languages in bilingual adult readers, suggesting that the activation of phonological representations is not language specific. Less is known about developing readers. First, it is unclear whether there is automatic phonological activation during visual word recognition among children in general. Second, no empirical data exist on whether the activation of phonological representations is language specific or not in bilingual children...
February 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/27814344/subclinical-mastitis-occurs-frequently-in-association-with-dramatic-changes-in-inflammatory-anti-inflammatory-breast-milk-components
#14
Edouard Tuaillon, Johanes Viljoen, Pierre Dujols, Gilles Cambonie, Pierre-Alain Rubbo, Nicolas Nagot, Ruth M Bland, Stéphanie Badiou, Marie-Louise Newell, Philippe Van de Perre
BACKGROUND: Subclinical mastitis (SCM) is a frequent, but poorly characterized entity that may influence immune development of breastfed infants. Mechanisms driving the emergence of SCM and changes in immunological content of human milk during SCM remains to be explored. In this study, the breast milk environment was to describe during SCM. METHODS: One hundred ten samples of mature breast milk were collected from 44 healthy, HIV negative mothers, included in a large infant feeding intervention cohort (ANRS 1271/Vertical Transmission Study)...
November 4, 2016: Pediatric Research
https://www.readbyqxmd.com/read/27749603/changes-in-cognitive-function-over-96-weeks-in-na%C3%A3-ve-patients-randomised-to-darunavir-ritonavir-plus-either-raltegravir-or-tenofovir-emtricitabine-a-substudy-of-the-neat001-anrs143-trial
#15
Alan Winston, Wolfgang Stöhr, Andrea Antinori, Helene Amieva, Philippe Perré, Stephane De Wit, Jacques Reynes, Mark Gompels, Antonella d'Arminio Monforte, Jose-Maria Gatell, Jesper Grarup, Anton Pozniak, Abdel Babiker, François Raffi, Laura Richert
BACKGROUND: Improvements in cognitive function are described after initiation of combination antiretroviral therapy (cART), with sparse data on differences between cART strategies. METHODS: We assessed changes in cognition, over 96 weeks, in therapy naïve HIV-positive adults randomised to darunavir/ritonavir (800/100mg once daily) with either raltegravir (400mg twice daily, Arm1) or tenofovir/emtricitabine (245/200mg once daily, Arm2). Seven cognitive tests were administered at baseline and week 96...
October 3, 2016: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/27703070/cap0037-a-novel-global-regulator-of-clostridium-acetobutylicum-metabolism
#16
Ngoc-Phuong-Thao Nguyen, Sonja Linder, Stefanie K Flitsch, Bettina Schiel-Bengelsdorf, Peter Dürre, Philippe Soucaille
: An operon comprising two genes, CA_P0037 and CA_P0036, that encode proteins of unknown function that were previously shown to be highly expressed in acidogenic cells and repressed in solventogenic and alcohologenic cells is located on the pSOL1 megaplasmid of Clostridium acetobutylicum upstream of adhE2 A CA_P0037::int (189/190s) mutant in which an intron was inserted at position 189/190 in the sense strand of CA_P0037 was successfully generated by the Targetron technique. The resultant mutant showed significantly different metabolic flux patterns in acidogenic (producing mainly lactate, butyrate, and butanol) and alcohologenic (producing mainly butyrate, acetate, and lactate) chemostat cultures but not in solventogenic or batch cultures...
October 4, 2016: MBio
https://www.readbyqxmd.com/read/27692645/separation-properties-of-the-mil-125-ti-metal-organic-framework-in-high-performance-liquid-chromatography-revealing-cis-trans-selectivity
#17
Stijn Van der Perre, Anuschka Liekens, Bart Bueken, Dirk E De Vos, Gino V Baron, Joeri F M Denayer
Monodisperse MIL-125(Ti) Metal-Organic Framework crystals were synthesized and studied as stationary phase in high performance liquid chromatography (HPLC). Different pure compounds and model mixtures (including stereoisomer mixtures) were injected from which chromatographic parameters, including selectivities and resolution factors, were determined to evaluate the adsorption properties and separation performance of MIL-125(Ti) in liquid phase. The MIL-125(Ti) framework displayed a trans selectivity for cis/trans difunctionalized cyclohexane molecules with high selectivity and resolution for 1,3-dimethylcyclohexane and 4-ethylcyclohexanol...
October 21, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27688094/zika-virus-strains-potentially-display-different-infectious-profiles-in-human-neural-cells
#18
Yannick Simonin, Fabien Loustalot, Caroline Desmetz, Vincent Foulongne, Orianne Constant, Chantal Fournier-Wirth, Fanny Leon, Jean-Pierre Molès, Aurélien Goubaud, Jean-Marc Lemaitre, Marianne Maquart, Isabelle Leparc-Goffart, Laurence Briant, Nicolas Nagot, Philippe Van de Perre, Sara Salinas
The recent Zika virus (ZIKV) epidemic has highlighted the poor knowledge on its physiopathology. Recent studies showed that ZIKV of the Asian lineage, responsible for this international outbreak, causes neuropathology in vitro and in vivo. However, two African lineages exist and the virus is currently found circulating in Africa. The original African strain was also suggested to be neurovirulent but its laboratory usage has been criticized due to its multiple passages. In this study, we compared the French Polynesian (Asian) ZIKV strain to an African strain isolated in Central African Republic and show a difference in infectivity and cellular response between both strains in human neural stem cells and astrocytes...
October 2016: EBioMedicine
https://www.readbyqxmd.com/read/27679613/high-nasal-carriage-rate-of-staphylococcus-aureus-containing-panton-valentine-leukocidin-and-edin-encoding-genes-in-community-and-hospital-settings-in-burkina-faso
#19
Abdoul-Salam Ouedraogo, Catherine Dunyach-Remy, Aimée Kissou, Soufiane Sanou, Armel Poda, Carole G Kyelem, Jérôme Solassol, Anne-Laure Bañuls, Philippe Van De Perre, Rasmata Ouédraogo, Hélène Jean-Pierre, Jean-Philippe Lavigne, Sylvain Godreuil
The objectives of the present study were to investigate the rate of S.aureus nasal carriage and molecular characteristics in hospital and community settings in Bobo Dioulasso, Burkina Faso. Nasal samples (n = 219) were collected from 116 healthy volunteers and 103 hospitalized patients in July and August 2014. Samples were first screened using CHROMagar Staph aureus chromogenic agar plates, and S. aureus strains were identified by mass spectrometry. Antibiotic susceptibility was tested using the disk diffusion method on Müller-Hinton agar...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27676423/circulating-3-t1am-and-3-5-t2-in-critically-ill-patients-a-cross-sectional-observational-study
#20
Lies Langouche, Ina Lehmphul, Sarah Vander Perre, Josef Köhrle, Greet Van den Berghe
BACKGROUND: Critical illness is hallmarked by low circulating thyroxine (T4) and triiodothyronine (T3) concentrations, in the presence of elevated reverse T3 (rT3) and low-normal thyrotropin (TSH), referred to as nonthyroidal illness (NTI). Thyroid hormone (TH) metabolism is substantially increased during NTI, in part explained by enhanced deiodinase 3 (D3) activity. T4- and T3-sulfate concentrations are elevated, due to suppressed D1 activity in the presence of unaltered sulfotransferase activity, and 3,3'-diiodothyronine (3,3'-T2) concentrations are normal...
December 2016: Thyroid: Official Journal of the American Thyroid Association
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