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https://www.readbyqxmd.com/read/28820470/adaption-of-fmdv-asia-1-to-suspension-culture-cell-resistance-is-overcome-by-virus-capsid-alterations
#1
Veronika Dill, Bernd Hoffmann, Aline Zimmer, Martin Beer, Michael Eschbaumer
Foot-and-mouth disease virus (FMDV) causes a highly contagious disease with catastrophic economic impact for affected countries. BHK21 suspension cells are preferred for the industrial production of FMDV vaccine antigen, but not all virus strains can be successfully propagated in these cells. Serotype Asia-1 is often affected by this phenomenon. In this study, the Asia-1 strain Shamir was used to examine viral, cellular and environmental factors that contribute to resistance to cell culture infection. Cell media composition, pH and ammonium chloride concentration did not affect Asia-1 differently than other serotypes...
August 18, 2017: Viruses
https://www.readbyqxmd.com/read/28818743/learning-and-combining-image-neighborhoods-using-random-forests-for-neonatal-brain-disease-classification
#2
Veronika A Zimmer, Ben Glocker, Nadine Hahner, Elisenda Eixarch, Gerard Sanroma, Eduard Gratacós, Daniel Rueckert, Miguel Ángel González Ballester, Gemma Piella
It is challenging to characterize and classify normal and abnormal brain development during early childhood. To reduce the complexity of heterogeneous data population, manifold learning techniques are increasingly applied, which find a low-dimensional representation of the data, while preserving all relevant information. The neighborhood definition used for constructing manifold representations of the population is crucial for preserving the similarity structure and it is highly application dependent. The recently proposed neighborhood approximation forests learn a neighborhood structure in a dataset based on a user-defined distance...
August 9, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28818431/wearable-technology-for-cardiology-an-update-and-framework-for-the-future
#3
REVIEW
Joshua M Pevnick, Kade Birkeland, Raymond Zimmer, Yaron Elad, Ilan Kedan
The field of cardiology has long used wearable medical devices to monitor heart rate and rhythm. The past decade has seen the emergence of many new wearable devices, including several that have been widely adopted by both physicians and consumers. In this review, we discuss existing and forthcoming devices designed to measure activity, heart rate, heart rhythm, and thoracic fluid. We also offer several frameworks to classify and better understand wearable devices, such that we may weigh their potential benefit in improving healthcare with the many challenges that must be addressed to reap these benefits...
August 9, 2017: Trends in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28817607/computer-aided-position-planning-of-miniplates-to-treat-facial-bone-defects
#4
Jan Egger, Jürgen Wallner, Markus Gall, Xiaojun Chen, Katja Schwenzer-Zimmerer, Knut Reinbacher, Dieter Schmalstieg
In this contribution, a software system for computer-aided position planning of miniplates to treat facial bone defects is proposed. The intra-operatively used bone plates have to be passively adapted on the underlying bone contours for adequate bone fragment stabilization. However, this procedure can lead to frequent intra-operatively performed material readjustments especially in complex surgical cases. Our approach is able to fit a selection of common implant models on the surgeon's desired position in a 3D computer model...
2017: PloS One
https://www.readbyqxmd.com/read/28816583/mammalian-cell-surface-display-for-monoclonal-antibody-based-facs-selection-of-viral-envelope-proteins
#5
Tim-Henrik Bruun, Veronika Grassmann, Benjamin Zimmer, Benedikt Asbach, David Peterhoff, Alexander Kliche, Ralf Wagner
The elicitation of broadly and efficiently neutralizing antibodies in humans by active immunization is still a major obstacle in the development of vaccines against pathogens such as the human immunodeficiency virus (HIV), influenza virus, hepatitis C virus or cytomegalovirus. Here, we describe a mammalian cell surface display and monoclonal antibody (mAb)-mediated panning technology that allows affinity-based selection of envelope (Env) variants from libraries. To this end, we established an experimental setup featuring: 1) single and site specific integration of Env to link genotype and phenotype, 2) inducible Env expression to avoid cytotoxicity effects, 3) translational coupling of Env and enhanced green fluorescent protein expression to normalize for Env protein levels, and 4) display on HEK cells to ensure native folding and mammalian glycosylation...
August 17, 2017: MAbs
https://www.readbyqxmd.com/read/28815855/solid-state-step-scan-ftir-spectroscopy-of-binuclear-copper-i-complexes
#6
Manuel Zimmer, Fabian Dietrich, Daniel Volz, Stefan Bräse, Markus Gerhards
The electronic ground and excited state structure of two binuclear Cu(I)-NHETPHOS-complexes, which are promising to be implemented in OLEDs (organic light emitting diodes), is investigated by a combination of the time-resolved step-scan FTIR technique and quantum chemical calculations at the DFT level. In contrast to the usual application of step-scan FTIR spectroscopy in solution the herein presented analyses are performed in solid phase, i.e. the Cu(I) complexes are embedded in a KBr matrix (KBr pellet). Applying "solid state" time-resolved step-scan FTIR spectroscopy is of great importance for transition metal complexes, since oftentimes their photophysical properties change when moving from solid to dissolved samples...
August 16, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28811218/wnt-signaling-positively-regulates-endothelial-cell-fate-specification-in-the-fli1a-positive-progenitor-population-via-lef1
#7
Kathleen Hübner, Kathrin S Grassme, Jyoti Rao, Nina K Wenke, Cordula L Zimmer, Laura Korte, Katja Mu Ller, Saulius Sumanas, Boris Greber, Wiebke Herzog
During vertebrate embryogenesis, vascular endothelial cells (ECs) and primitive erythrocytes become specified within close proximity in the posterior lateral plate mesoderm (LPM) from a common progenitor. However, the signaling cascades regulating the specification into either lineage remain largely elusive. Here, we analyze the contribution of β-catenin dependent Wnt signaling to EC and erythrocyte specification during zebrafish embryogenesis. We generated novel β-catenin dependent Wnt signaling reporters which, by using destabilized fluorophores (Venus-Pest, dGFP), specifically allow us to detect Wnt signaling responses in narrow time windows as well as in spatially restricted domains, defined by Cre recombinase expression (Tg(axin2BAC:Venus-Pest)(mu288); Tg(14TCF:loxP-STOP-loxP-dGFP)(mu202))...
August 12, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28809641/cementless-total-hip-arthroplasty-in-primary-myelofibrosis-a-case-report
#8
S Brodt, E Eigendorff, G Matziolis
There is a great deal of data available, in part contradictory, on the best fixation technique to use for total hip arthroplasty (THA) in hip osteoarthritis. Both the cementless and the cemented versions offer excellent long-term outcomes - if the respective technique is applied correctly. However, as far as we know, no recommendation has been made regarding cemented vs. cementless THA in primary myelofibrosis. The case described here concerns a very active 76-year-old patient with primary myelofibrosis. This is a rare hematological disease...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28808237/coding-and-small-non-coding-transcriptional-landscape-of-tuberous-sclerosis-complex-cortical-tubers-implications-for-pathophysiology-and-treatment
#9
James D Mills, Anand M Iyer, Jackelien van Scheppingen, Anika Bongaarts, Jasper J Anink, Bart Janssen, Till S Zimmer, Wim G Spliet, Peter C van Rijen, Floor E Jansen, Martha Feucht, Johannes A Hainfellner, Pavel Krsek, Josef Zamecnik, Katarzyna Kotulska, Sergiusz Jozwiak, Anna Jansen, Lieven Lagae, Paolo Curatolo, David J Kwiatkowski, R Jeroen Pasterkamp, Ketharini Senthilkumar, Lars von Oerthel, Marco F Hoekman, Jan A Gorter, Peter B Crino, Angelika Mühlebner, Brendon P Scicluna, Eleonora Aronica
Tuberous Sclerosis Complex (TSC) is a rare genetic disorder that results from a mutation in the TSC1 or TSC2 genes leading to constitutive activation of the mechanistic target of rapamycin complex 1 (mTORC1). TSC is associated with autism, intellectual disability and severe epilepsy. Cortical tubers are believed to represent the neuropathological substrates of these disabling manifestations in TSC. In the presented study we used high-throughput RNA sequencing in combination with systems-based computational approaches to investigate the complexity of the TSC molecular network...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807383/prediction-of-major-cardiac-events-after-vascular-surgery
#10
Danielle M Gualandro, Christian Puelacher, Giovanna LuratiBuse, Gisela B Llobet, Pai C Yu, Francisco A Cardozo, Noemi Glarner, Andres Zimmerli, Jaqueline Espinola, Sydney Corbière, Daniela Calderaro, Andre C Marques, Ivan B Casella, Nelson de Luccia, Mucio T Oliveira, Andreas Lampart, Daniel Bolliger, Luzius Steiner, Manfred Seeberger, Christoph Kindler, Stefan Osswald, Lorenz Gürke, Bruno Caramelli, Christian Mueller
OBJECTIVE: Predicting cardiac events is essential to provide patients with the best medical care and to assess the risk-benefit ratio of surgical procedures. The aim of our study was to evaluate the performance of the Revised Cardiac Risk Index (Lee) and the Vascular Study Group of New England Cardiac Risk Index (VSG) scores for the prediction of major cardiac events in unselected patients undergoing arterial surgery and to determine whether the inclusion of additional risk factors improved their accuracy...
August 11, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28805936/characterizing-hypoxia-in-human-glioma-a-simultaneous-multimodal-mri-and-pet-study
#11
Christine Preibisch, Kuangyu Shi, Anne Kluge, Mathias Lukas, Benedikt Wiestler, Jens Göttler, Jens Gempt, Florian Ringel, Mohamed Al Jaberi, Jürgen Schlegel, Bernhard Meyer, Claus Zimmer, Thomas Pyka, Stefan Förster
Hypoxia plays an important role for the prognosis and therapy response of cancer. Thus, hypoxia imaging would be a valuable tool for pre-therapeutic assessment of tumor malignancy. However, there is no standard validated technique for clinical application available yet. Therefore, we performed a study in 12 patients with high-grade glioma, where we directly compared the two currently most promising techniques, namely the MR-based relative oxygen extraction fraction (MR-rOEF) and the PET hypoxia marker H-1-(3-[(18) F]-fluoro-2-hydroxypropyl)-2-nitroimidazole ([(18) F]-FMISO)...
August 14, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28797884/drifting-of-heme-coordinating-group-in-imidazolylmethylxanthones-leading-to-improved-selective-inhibition-of-cyp11b1
#12
Silvia Gobbi, Qingzhong Hu, Christina Zimmer, Federica Belluti, Angela Rampa, Rolf W Hartmann, Alessandra Bisi
An abnormal increase in glucocorticoid levels is responsible for pathological disorders affecting different organs and systems, and the selective inhibition of appropriate steroidogenic enzymes represents a validated strategy to restore their physiological levels. In continuing our studies on CYP11B inhibitors, in this paper a small series of 6-substituted 3-imidazolylmethylxanthones was designed and synthesized, according to the data acquired from previously reported series of derivatives and from a purposely-performed docking study...
August 2, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28783845/serotonin-shapes-the-migratory-potential-of-nk-cells-an-in-vitro-approach
#13
Philipp Zimmer, Wilhelm Bloch, Markus Kieven, Lukas Lövenich, Jonas Lehmann, Michelle Holthaus, Sebastian Theurich, Alexander Schenk
Increased serotonin (5-HT) levels have been shown to influence natural killer cell (NK cell) function. Acute exercise mobilizes and activates NK cells and further increases serum 5-HT concentrations in a dose-dependent manner. The aim of this study was to investigate the impact of different serum 5-HT concentrations on NK cell migratory potential and cytotoxicity.The human NK cell line KHYG-1 was assigned to 4 conditions, including 3 physiological concentrations of 5-HT (100, 130 or 170 µg/l 5-HT) and one control condition...
August 7, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28771234/aav5-mihtt-gene-therapy-demonstrates-suppression-of-mutant-huntingtin-aggregation-and-neuronal-dysfunction-in-a-rat-model-of-huntington-s-disease
#14
J Miniarikova, V Zimmer, R Martier, C C Brouwers, C Pythoud, K Richetin, M Rey, J Lubelski, M M Evers, S J van Deventer, H Petry, N Déglon, P Konstantinova
Huntington's disease (HD) is a fatal progressive neurodegenerative disease caused by a mutation in the huntingtin (HTT) gene. To date, there is no treatment to halt or reverse the course of HD. Lowering of either total or only the mutant HTT expression is expected to have therapeutic benefit. This can be achieved by engineered micro (mi)RNAs targeting HTT transcripts and delivered by an adeno-associated viral (AAV) vector. We have previously showed a miHTT construct to induce total HTT knock-down in Hu128/21 HD mice, while miSNP50T and miSNP67T constructs induced allele-selective HTT knock-down in vitro...
August 3, 2017: Gene Therapy
https://www.readbyqxmd.com/read/28769874/high-glucocorticoid-response-to-24-h-shift-stressors-in-male-but-not-in-female-physicians
#15
Claudia Boettcher, Michaela F Hartmann, Klaus-Peter Zimmer, Stefan A Wudy
Physicians' daily work is accompanied by emotional and physical stress, and 24-h shifts are considered to be a major stressor. Effects of stressors on the hypothalamic-pituitary-adrenal (HPA) axis can be evaluated by estimating the glucocorticoid excretion in urine samples. We characterized the impact of a 24-h working period on the urinary glucocorticoid excretion of physicians and focused on gender differences. 10 females and 12 male physicians collected 24-h urine samples during a 24-h shift ("on-duty") and on a free weekend ("off-duty") that were analyzed by gas chromatography-mass spectrometry...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28769801/characterization-and-reliability-of-18-f-2fnq1p-in-cynomolgus-monkeys-as-a-pet-radiotracer-for-serotonin-5-ht6-receptors
#16
Véronique Sgambato-Faure, Thierry Billard, Elise Météreau, Sandra Duperrier, Sylvain Fieux, Nicolas Costes, Léon Tremblay, Luc Zimmer
Brain serotonin-6 receptor (5-HT6R) is the one of the most recently identified serotonin receptors. Accumulating evidence suggests that it is a potent therapeutic target for psychiatric and neurological diseases. Since [(18)F]2FNQ1P was recently proposed as the first fluorinated positron emission tomography (PET) radioligand for this receptor, the objective of the present study was to demonstrate its suitability for 5-HT6R neuroimaging in primates. [(18)F]2FNQ1P was characterized by in vitro autoradiography and in vivo PET imaging in cynomolgus monkeys...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28768815/synthesis-and-self-assembly-of-cellulose-microfibrils-from-reconstituted-cellulose-synthase
#17
Sung Hyun Cho, Pallinti Purushotham, Chao Fang, Cassandra Maranas, Sara M Díaz-Moreno, Vincent Bulone, Jochen Zimmer, Manish Kumar, B Tracy Nixon
Cellulose, the major component of plant cell walls, can be converted to bioethanol and is thus highly studied. In plants, cellulose is produced by cellulose synthase, a processive family-2 glycosyltransferase. In plant cell walls, individual β-1,4-glucan chains polymerized by CesA are assembled into microfibrils that are frequently bundled into macrofibrils. An in vitro system in which cellulose is synthesized and assembled into fibrils would facilitate detailed study of this process. Here, we report the heterologous expression and partial purification of His-tagged CesA5 from Physcomitrella patens...
August 2, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28765628/nod2-gene-variants-confer-risk-for-secondary-sclerosing-cholangitis-in-critically-ill-patients
#18
Christoph Jüngst, Vanessa Stadlbauer, Matthias C Reichert, Vincent Zimmer, Susanne N Weber, Lisa Ofner-Ziegenfuß, Torsten Voigtländer, Walter Spindelböck, Peter Fickert, Gabriele I Kirchner, Frank Lammert, Tim O Lankisch, Marcin Krawczyk
Sclerosing cholangitis in critically ill patients (SC-CIP) is a progressive cholestatic disease of unknown aetiology characterized by chronic biliary infections. Hence we hypothesized that common NOD2 (nucleotide-binding oligomerisation domain containing 2) gene variants, known risk factors for Crohn's disease and bacterial translocation in liver cirrhosis, increase the odds of developing SC-CIP. Screening of 4,641 endoscopic retrograde cholangiography procedures identified 17 patients with SC-CIP, who were then genotyped for the three common NOD2 mutations (Cohort 1, discovery cohort)...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28764835/the-cobblestone-sign-in-a-child-with-crohn-s-disease
#19
Julia Ortwein, Jan de Laffolie, Klaus-Peter Zimmer
No abstract text is available yet for this article.
July 10, 2017: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/28763250/bioanalytical-outsourcing-models-in-pharmaceutical-companies
#20
Dieter Zimmer
No abstract text is available yet for this article.
August 1, 2017: Bioanalysis
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