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https://www.readbyqxmd.com/read/28475476/signatures-of-cytoplasmic-proteins-in-the-exoproteome-distinguish-community-and-hospital-associated-methicillin-resistant-staphylococcus-aureus-usa300-lineages
#1
Solomon A Mekonnen, Laura M Palma Medina, Corinna Glasner, Eleni Tsompanidou, Anne de Jong, Stefano Grasso, Marc Schaffer, Ulrike Mäder, Anders R Larsen, Heidi Gumpert, Henrik Westh, Uwe Völker, Andreas Otto, Dörte Becher, Jan Maarten van Dijl
Methicillin-resistant Staphylococcus aureus (MRSA) is the common name for a heterogeneous group of highly drug-resistant staphylococci. Two major MRSA classes are distinguished based on epidemiology, namely community-associated (CA) and hospital-associated (HA) MRSA. Notably, the distinction of CA- and HA-MRSA based on molecular traits remains difficult due to the high genomic plasticity of S. aureus. Here we sought to pinpoint global distinguishing features of CA- and HA-MRSA through a comparative genome and proteome analysis of the notorious MRSA lineage USA300...
May 5, 2017: Virulence
https://www.readbyqxmd.com/read/28368488/plasma-microrna-levels-are-associated-with-hepatitis-b-e-antigen-status-and-treatment-response-in-chronic-hepatitis-b-patients
#2
Meike H van der Ree, Louis Jansen, Zita Kruize, Ad C van Nuenen, Karel A van Dort, R Bart Takkenberg, Hendrik W Reesink, Neeltje A Kootstra
Background.: Hepatitis B virus (HBV) modulates microRNA (miRNA) expression to support viral replication. The aim of this study was to identify miRNAs associated with hepatitis B e antigen (HBeAg) status and response to antiviral therapy in patients with chronic hepatitis B (CHB) , and to assess if these miRNAs are actively secreted by hepatoma cells. Methods.: Plasma miRNA levels were measured by reverse-transcription quantitative polymerase chain reaction in healthy controls (n = 10) and pretreatment samples of an identification cohort (n = 24) and a confirmation cohort (n = 64) of CHB patients treated with peginterferon/nucleotide analogue combination therapy...
May 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28345871/in-vivo-targeting-and-positron-emission-tomography-imaging-of-tumor-with-intrinsically-radioactive-metal-organic-frameworks-nanomaterials
#3
Daiqin Chen, Dongzhi Yang, Casey A Dougherty, Weifei Lu, Hongwei Wu, Xianran He, Ting Cai, Marcian E Van Dort, Brian D Ross, Hao Hong
Nanoscale metal-organic frameworks (nMOF) materials represent an attractive tool for various biomedical applications. Due to the chemical versatility, enormous porosity, and tunable degradability of nMOFs, they have been adopted as carriers for delivery of imaging and/or therapeutic cargos. However, the relatively low stability of most nMOFs has limited practical in vivo applications. Here we report the production and characterization of an intrinsically radioactive UiO-66 nMOF ((89)Zr-UiO-66) with incorporation of positron-emitting isotope zirconium-89 ((89)Zr)...
April 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28323255/erratum-hiv-1-blocks-the-signaling-adaptor-mavs-to-evade-antiviral-host-defense-after-sensing-of-abortive-hiv-1-rna-by-the-host-helicase-ddx3
#4
Sonja I Gringhuis, Nina Hertoghs, Tanja M Kaptein, Esther M Zijlstra-Willems, Ramin Sarrami-Fooroshani, Joris K Sprokholt, Nienke H van Teijlingen, Neeltje A Kootstra, Thijs Booiman, Karel A van Dort, Carla M S Ribeiro, Agata Drewniak, Teunis B H Geijtenbeek
No abstract text is available yet for this article.
March 22, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28276126/aquatic-adaptation-of-a-laterally-acquired-pectin-degradation-pathway-in-marine-gammaproteobacteria
#5
Jan-Hendrik Hehemann, Le Van Truong, Frank Unfried, Norma Welsch, Johannes Kabisch, Stefan E Heiden, Sabryna Junker, Dörte Becher, Andrea Thürmer, Rolf Daniel, Rudolf Amann, Thomas Schweder
Mobile genomic islands distribute functional traits between microbes and habitats, yet it remains unclear how their proteins adapt to new environments. Here we used a comparative phylogenomic and proteomic approach to show that the marine bacterium Pseudoalteromonas haloplanktis ANT/505 acquired a genomic island with a functional pathway for pectin catabolism. Bioinformatics and biochemical experiments revealed that this pathway encodes a series of carbohydrate-active enzymes including two multi-modular pectate lyases, PelA and PelB...
March 9, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28179432/an-evolutionarily-conserved-role-for-polydom-svep1-during-lymphatic-vessel-formation
#6
Terhi Karpanen, Yvonne Padberg, Serge A van de Pavert, Cathrin Dierkes, Nanami Morooka, Josi Peterson-Maduro, Glenn van de Hoek, Max Adrian, Naoki Mochizuki, Kiyotoshi Sekiguchi, Friedemann Kiefer, Dörte Schulte, Stefan Schulte-Merker
RATIONALE: Lymphatic vessel formation and function constitutes a physiologically and pathophysiologically important process, but its genetic control is not well understood. OBJECTIVE: Here, we identify the secreted Polydom/Svep1 protein as essential for the formation of the lymphatic vasculature. We analyzed mutants in mice and zebrafish to gain insight into the role of Polydom/Svep1 in the lymphangiogenic process. METHODS AND RESULTS: Phenotypic analysis of zebrafish polydom/svep1 mutants showed a decrease in venous and lymphovenous sprouting, which leads to an increased number of intersegmental arteries...
April 14, 2017: Circulation Research
https://www.readbyqxmd.com/read/28179130/mitochondrial-function-in-m%C3%A3-ller-cells-does-it-matter
#7
Anne Katrine Toft-Kehler, Dorte Marie Skytt, Alicia Svare, Evy Lefevere, Inge Van Hove, Lieve Moons, Helle S Waagepetersen, Miriam Kolko
Growing evidence suggests that mitochondrial dysfunction might play a key role in the pathogenesis of age-related neurodegenerative inner retinal diseases such as diabetic retinopathy and glaucoma. Therefore, the present review provides a perspective on the impact of functional mitochondria in the most predominant glial cells of the retina, the Müller cells. Müller cells span the entire thickness of the neuroretina and are in close proximity to retinal cells including the retinal neurons that provides visual signaling to the brain...
February 5, 2017: Mitochondrion
https://www.readbyqxmd.com/read/28135101/design-and-investigation-of-a-18-f-labeled-benzamide-derivative-as-a-high-affinity-dual-sigma-receptor-subtype-radioligand-for-prostate-tumor-imaging
#8
Dongzhi Yang, Anthony Comeau, Wayne D Bowen, Robert H Mach, Brian D Ross, Hao Hong, Marcian E Van Dort
High overexpression of sigma (σ) receptors (σ1 and σ2 subtypes) in a variety of human solid tumors has prompted the development of σ receptor-targeting radioligands, as imaging agents for tumor detection. A majority of these radioligands to date target the σ2 receptor, a potential marker of tumor proliferative status. The identification of approximately equal proportions of both σ receptor subtypes in prostate tumors suggests that a high affinity, dual σ receptor-targeting radioligand could potentially provide enhanced tumor targeting efficacy in prostate cancer...
March 6, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28024153/hiv-1-blocks-the-signaling-adaptor-mavs-to-evade-antiviral-host-defense-after-sensing-of-abortive-hiv-1-rna-by-the-host-helicase-ddx3
#9
Sonja I Gringhuis, Nina Hertoghs, Tanja M Kaptein, Esther M Zijlstra-Willems, Ramin Sarrami-Fooroshani, Joris K Sprokholt, Nienke H van Teijlingen, Neeltje A Kootstra, Thijs Booiman, Karel A van Dort, Carla M S Ribeiro, Agata Drewniak, Teunis B H Geijtenbeek
The mechanisms by which human immunodeficiency virus 1 (HIV-1) avoids immune surveillance by dendritic cells (DCs), and thereby prevents protective adaptive immune responses, remain poorly understood. Here we showed that HIV-1 actively arrested antiviral immune responses by DCs, which contributed to efficient HIV-1 replication in infected individuals. We identified the RNA helicase DDX3 as an HIV-1 sensor that bound abortive HIV-1 RNA after HIV-1 infection and induced DC maturation and type I interferon responses via the signaling adaptor MAVS...
February 2017: Nature Immunology
https://www.readbyqxmd.com/read/27935767/effect-of-physical-activity-and-or-healthy-eating-on-gdm-risk-the-dali-lifestyle-study
#10
David Simmons, Roland Devlieger, André van Assche, Goele Jans, Sander Galjaard, Rosa Corcoy, Juan M Adelantado, Fidelma Dunne, Gernot Desoye, Jürgen Harreiter, Alexandra Kautzky-Willer, Peter Damm, Elisabeth R Mathiesen, Dorte M Jensen, Liselotte Andersen, Annunziata Lapolla, Maria G Dalfrà, Alessandra Bertolotto, Ewa Wender-Ozegowska, Agnieszka Zawiejska, David Hill, Frank J Snoek, Judith G M Jelsma, Mireille N M van Poppel
Context: Lifestyle approaches for preventing gestational diabetes mellitus (GDM) have produced mixed results. Objective: The aim of the present study was to compare the effectiveness of 3 lifestyle interventions [healthy eating (HE), physical activity (PA), and both HE and PA (HE+PA)] with usual care (UC) in reducing GDM risk. Design: The present study was a multicenter randomized controlled trial conducted from 2012 to 2014 [the DALI (vitamin D and lifestyle intervention for GDM prevention) lifestyle study]...
March 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27791160/optogenetic-activation-of-dopamine-neurons-in-the-ventral-tegmental-area-induces-reanimation-from-general-anesthesia
#11
Norman E Taylor, Christa J Van Dort, Jonathan D Kenny, JunZhu Pei, Jennifer A Guidera, Ksenia Y Vlasov, Justin T Lee, Edward S Boyden, Emery N Brown, Ken Solt
Dopamine (DA) promotes wakefulness, and DA transporter inhibitors such as dextroamphetamine and methylphenidate are effective for increasing arousal and inducing reanimation, or active emergence from general anesthesia. DA neurons in the ventral tegmental area (VTA) are involved in reward processing, motivation, emotion, reinforcement, and cognition, but their role in regulating wakefulness is less clear. The current study was performed to test the hypothesis that selective optogenetic activation of VTA DA neurons is sufficient to induce arousal from an unconscious, anesthetized state...
October 24, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27745744/effect-of-itraconazole-and-rifampin-on-the-pharmacokinetics-of-olaparib-in-patients-with-advanced-solid-tumors-results-of-two-phase-i-open-label-studies
#12
Luc Dirix, Helen Swaisland, Henk M W Verheul, Sylvie Rottey, Karin Leunen, Guy Jerusalem, Christian Rolfo, Dorte Nielsen, L Rhoda Molife, Rebecca Kristeleit, Judith de Vos-Geelen, Morten Mau-Sørensen, Patricia Soetekouw, Carla van Herpen, Anitra Fielding, Karen So, Wendy Bannister, Ruth Plummer
PURPOSE: The metabolism of olaparib, a potent inhibitor of poly(ADP-ribose) polymerase (PARP) with demonstrated efficacy in patients with BRCA-mutated ovarian cancer, is mediated by cytochrome P450 (CYP) enzymes (predominantly CYP3A4/5). We assessed the potential of a CYP3A4 inhibitor (itraconazole) and inducer (rifampin) to alter the pharmacokinetic (PK) profile of olaparib following single oral tablet doses. METHODS: Two Phase I, open-label, non-randomized trials were conducted in patients with advanced solid tumors...
October 2016: Clinical Therapeutics
https://www.readbyqxmd.com/read/27729618/antibody-based-pet-of-upa-upar-signaling-with-broad-applicability-for-cancer-imaging
#13
Dongzhi Yang, Gregory W Severin, Casey A Dougherty, Rachel Lombardi, Daiqin Chen, Marcian E Van Dort, Todd E Barnhart, Brian D Ross, Andrew P Mazar, Hao Hong
Mounting evidence suggests that the urokinase plasminogen activator (uPA) and its receptor (uPAR) play a central role in tumor progression. The goal of this study was to develop an 89Zr-labeled, antibody-based positron emission tomography (PET) tracer for quantitative imaging of the uPA/uPAR system. An anti-uPA monoclonal antibody (ATN-291) was conjugated with a deferoxamine (Df) derivative and subsequently labeled with 89Zr. Flow cytometry, microscopy studies, and competitive binding assays were conducted to validate the binding specificity of Df-ATN-291 against uPA...
November 8, 2016: Oncotarget
https://www.readbyqxmd.com/read/27712078/extracellular-proteome-and-citrullinome-of-the-oral-pathogen-porphyromonas-gingivalis
#14
Tim Stobernack, Corinna Glasner, Sabryna Junker, Giorgio Gabarrini, Menke de Smit, Anne de Jong, Andreas Otto, Dörte Becher, Arie Jan van Winkelhoff, Jan Maarten van Dijl
Porphyromonas gingivalis is an oral pathogen associated with the inflammatory disease periodontitis. Periodontitis and P. gingivalis have been associated with rheumatoid arthritis. One of the hallmarks of rheumatoid arthritis is the loss of tolerance against citrullinated proteins. Citrullination is a post-translational modification of arginine residues, leading to a change in structure and function of the respective protein. This modification, which is catalyzed by peptidylarginine deiminases (PADs), plays a role in several physiological processes in the human body...
December 2, 2016: Journal of Proteome Research
https://www.readbyqxmd.com/read/27600137/comparisons-of-serum-infliximab-and-antibodies-to-infliximab-tests-used-in-inflammatory-bowel-disease-clinical-trials-of-remicade%C3%A2
#15
Joseph C Marini, Jocelyn Sendecki, Freddy Cornillie, John W Popp, Shawn Black, Marion Blank, Ann Gils, Thomas Van Stappen, Dörte Hamann, Theo Rispens, Lina Thérien, Kelly Chun, Gopi Shankar
Monitoring infliximab (IFX) concentrations and antibodies-to-IFX (ATI) titers during inflammatory bowel disease treatment may allow more informed decisions in assessing exposure/response and determining appropriate dosing. To aid in interpreting results from different commercial tests in the context of Janssen's published Remicade® results, the reliability of Janssen's IFX and ATI assays was compared with commercial assays from KU Leuven, Sanquin, Dynacare, and LabCorp. Test results were independently reported to Janssen...
January 2017: AAPS Journal
https://www.readbyqxmd.com/read/27581168/the-fundamental-role-of-ecological-feedback-mechanisms-for-the-adaptive-management-of-seagrass-ecosystems%C3%A2-%C3%A2-a-review
#16
Paul S Maxwell, Johan S Eklöf, Marieke M van Katwijk, Katherine R O'Brien, Maricela de la Torre-Castro, Christoffer Boström, Tjeerd J Bouma, Dorte Krause-Jensen, Richard K F Unsworth, Brigitta I van Tussenbroek, Tjisse van der Heide
Seagrass meadows are vital ecosystems in coastal zones worldwide, but are also under global threat. One of the major hurdles restricting the success of seagrass conservation and restoration is our limited understanding of ecological feedback mechanisms. In these ecosystems, multiple, self-reinforcing feedbacks can undermine conservation efforts by masking environmental impacts until the decline is precipitous, or alternatively they can inhibit seagrass recovery in spite of restoration efforts. However, no clear framework yet exists for identifying or dealing with feedbacks to improve the management of seagrass ecosystems...
September 1, 2016: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/27169904/cross-cultural-validation-of-the-turkish-four-dimensional-symptom-questionnaire-4dsq-using-differential-item-and-test-functioning-dif-and-dtf-analysis
#17
Berend Terluin, Pemra C Unalan, Nurver Turfaner Sipahioğlu, Seda Arslan Özkul, Harm W J van Marwijk
BACKGROUND: The Four-Dimensional Symptom Questionnaire (4DSQ) is originally a Dutch 50 item questionnaire developed in primary care to assess distress, depression, anxiety and somatization. We aimed to develop and validate a Turkish translation of the 4DSQ. METHODS: The questionnaire was translated using forward and backward translation, and pilot testing. Turkish 4DSQ-data were collected in 352 consecutive adult primary care patients. For comparison, gender and age matched Dutch reference data were drawn from a larger existing dataset...
2016: BMC Family Practice
https://www.readbyqxmd.com/read/27157582/customized-recommendations-for-production-management-clusters-of-north-american-automatic-milking-systems
#18
Marlène Tremblay, Justin P Hess, Brock M Christenson, Kolby K McIntyre, Ben Smink, Arjen J van der Kamp, Lisanne G de Jong, Dörte Döpfer
Automatic milking systems (AMS) are implemented in a variety of situations and environments. Consequently, there is a need to characterize individual farming practices and regional challenges to streamline management advice and objectives for producers. Benchmarking is often used in the dairy industry to compare farms by computing percentile ranks of the production values of groups of farms. Grouping for conventional benchmarking is commonly limited to the use of a few factors such as farms' geographic region or breed of cattle...
July 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27113605/multicentre-comparison-of-a-diagnostic-assay-aquaporin-4-antibodies-in-neuromyelitis-optica
#19
RANDOMIZED CONTROLLED TRIAL
Patrick Waters, Markus Reindl, Albert Saiz, Kathrin Schanda, Friederike Tuller, Vlastimil Kral, Petra Nytrova, Ondrej Sobek, Helle Hvilsted Nielsen, Torben Barington, Søren T Lillevang, Zsolt Illes, Kristin Rentzsch, Achim Berthele, Tímea Berki, Letizia Granieri, Antonio Bertolotto, Bruno Giometto, Luigi Zuliani, Dörte Hamann, E Daniëlle van Pelt, Rogier Hintzen, Romana Höftberger, Carme Costa, Manuel Comabella, Xavier Montalban, Mar Tintoré, Aksel Siva, Ayse Altintas, Günnur Deniz, Mark Woodhall, Jacqueline Palace, Friedemann Paul, Hans-Peter Hartung, Orhan Aktas, Sven Jarius, Brigitte Wildemann, Christian Vedeler, Anne Ruiz, M Isabel Leite, Peter Trillenberg, Monika Probst, Sandra Saschenbrecker, Angela Vincent, Romain Marignier
OBJECTIVE: Antibodies to cell surface central nervous system proteins help to diagnose conditions which often respond to immunotherapies. The assessment of antibody assays needs to reflect their clinical utility. We report the results of a multicentre study of aquaporin (AQP) 4 antibody (AQP4-Ab) assays in neuromyelitis optica spectrum disorders (NMOSD). METHODS: Coded samples from patients with neuromyelitis optica (NMO) or NMOSD (101) and controls (92) were tested at 15 European diagnostic centres using 21 assays including live (n=3) or fixed cell-based assays (n=10), flow cytometry (n=4), immunohistochemistry (n=3) and ELISA (n=1)...
September 2016: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/26996810/global-analysis-of-the-impact-of-linezolid-onto-virulence-factor-production-in-s-aureus-usa300
#20
Florian Bonn, Jan Pané-Farré, Rabea Schlüter, Marc Schaffer, Stephan Fuchs, Jörg Bernhardt, Katharina Riedel, Andreas Otto, Uwe Völker, Jan Maarten van Dijl, Michael Hecker, Ulrike Mäder, Dörte Becher
The translation inhibitor linezolid is an antibiotic of last resort against Gram-positive pathogens including methicillin resistant strains of the nosocomial pathogen Staphylococcus aureus. Linezolid is reported to inhibit production of extracellular virulence factors, but the molecular cause is unknown. To elucidate the physiological response of S. aureus to linezolid in general and the inhibition of virulence factor synthesis in particular a holistic study was performed. Linezolid was added to exponentially growing S...
May 2016: International Journal of Medical Microbiology: IJMM
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