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Michael Vogt

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https://www.readbyqxmd.com/read/28335271/distribution-of-iron-oxide-core-titanium-dioxide-shell-nanoparticles-in-vx2-tumor-bearing-rabbits-introduced-by-two-different-delivery-modalities
#1
Tamer Refaat, Derek West, Samar El Achy, Vamsi Parimi, Jasmine May, Lun Xin, Kathleen R Harris, William Liu, Michael Beau Wanzer, Lydia Finney, Evan Maxey, Stefan Vogt, Reed A Omary, Daniele Procissi, Andrew C Larson, Tatjana Paunesku, Gayle E Woloschak
This work compares intravenous (IV) versus fluoroscopy-guided transarterial intra-catheter (IC) delivery of iron oxide core-titanium dioxide shell nanoparticles (NPs) in vivo in VX2 model of liver cancer in rabbits. NPs coated with glucose and decorated with a peptide sequence from cortactin were administered to animals with developed VX2 liver cancer. Two hours after NPs delivery tumors, normal liver, kidney, lung and spleen tissues were harvested and used for a series on histological and elemental analysis tests...
August 3, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28327570/puf60-variants-cause-a-syndrome-of-id-short-stature-microcephaly-coloboma-craniofacial-cardiac-renal-and-spinal-features
#2
Karen J Low, Morad Ansari, Rami Abou Jamra, Angus Clarke, Salima El Chehadeh, David R FitzPatrick, Mark Greenslade, Alex Henderson, Jane Hurst, Kory Keller, Paul Kuentz, Trine Prescott, Franziska Roessler, Kaja K Selmer, Michael C Schneider, Fiona Stewart, Katrina Tatton-Brown, Julien Thevenon, Magnus D Vigeland, Julie Vogt, Marjolaine Willems, Jonathan Zonana, D D D Study, Sarah F Smithson
PUF60 encodes a nucleic acid-binding protein, a component of multimeric complexes regulating RNA splicing and transcription. In 2013, patients with microdeletions of chromosome 8q24.3 including PUF60 were found to have developmental delay, microcephaly, craniofacial, renal and cardiac defects. Very similar phenotypes have been described in six patients with variants in PUF60, suggesting that it underlies the syndrome. We report 12 additional patients with PUF60 variants who were ascertained using exome sequencing: six through the Deciphering Developmental Disorders Study and six through similar projects...
March 22, 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28322423/uptake-of-non-vitamin-k-antagonist-oral-anti-coagulants-in-patients-with-atrial-fibrillation-a-prospective-cohort-study
#3
Matylda Zimny, Steffen Blum, Peter Ammann, Paul Erne, Giorgio Moschovitis, Marcello Di Valentino, Dipen Shah, Jürg Schläpfer, Cyrill Vogt, Alexandra Tabord, Michael Kühne, Christian Sticherling, Stefan Osswald, David Conen
AIMS: We aimed to assess the uptake of non-vitamin K antagonist oral anticoagulants (NOACs) among patients with atrial fibrillation between 2010 and 2015 in Switzerland. METHODS: We performed a prospective observational cohort study. At the baseline examination and during yearly follow-ups, we used questionnaires to obtain information about clinical characteristics and antithrombotic treatment. Stroke risk was assessed using the CHA2DS2-VASc score. RESULTS: 1545 patients were enrolled across seven centres in Switzerland...
March 21, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28177300/spinal-pedicle-screw-planning-using-deformable-atlas-registration
#4
J Goerres, A Uneri, T De Silva, M Ketcha, S Reaungamornrat, M Jacobson, S Vogt, G Kleinszig, G Osgood, J-P Wolinsky, J H Siewerdsen
Spinal screw placement is a challenging task due to small bone corridors and high risk of neurological or vascular complications, benefiting from precision guidance/navigation and quality assurance (QA). Implicit to both guidance and QA is the definition of a surgical plan-i.e. the desired trajectories and device selection for target vertebrae-conventionally requiring time-consuming manual annotations by a skilled surgeon. We propose automation of such planning by deriving the pedicle trajectory and device selection from a patient's preoperative CT or MRI...
April 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28163879/aerodynamic-evaluation-of-wing-shape-and-wing-orientation-in-four-butterfly-species-using-numerical-simulations-and-a-low-speed-wind-tunnel-and-its-implications-for-the-design-of-flying-micro-robots
#5
Alejandro Ortega Ancel, Rodney Eastwood, Daniel Vogt, Carter Ithier, Michael Smith, Rob Wood, Mirko Kovač
Many insects are well adapted to long-distance migration despite the larger energetic costs of flight for small body sizes. To optimize wing design for next-generation flying micro-robots, we analyse butterfly wing shapes and wing orientations at full scale using numerical simulations and in a low-speed wind tunnel at 2, 3.5 and 5 m s(-1). The results indicate that wing orientations which maximize wing span lead to the highest glide performance, with lift to drag ratios up to 6.28, while spreading the fore-wings forward can increase the maximum lift produced and thus improve versatility...
February 6, 2017: Interface Focus
https://www.readbyqxmd.com/read/28154014/a-tumor-cell-selective-inhibitor-of-mitogen-activated-protein-kinase-phosphatases-sensitizes-breast-cancer-cells-to-lymphokine-activated-killer-cell-activity
#6
Christof T Kaltenmeier, Laura L Vollmer, Lawrence A Vernetti, Lindsay Caprio, Keanu Davis, Vasiliy N Korotchenko, Billy W Day, Michael Tsang, Keren I Hulkower, Michael T Lotze, Andreas Vogt
Dual specificity mitogen activated protein kinase (MAPK) phosphatases (DUSP-MKPs) have been hypothesized to maintain cancer cell survival by buffering excessive MAPK signaling caused by upstream activating oncogenic products. A large and diverse body of literature suggests that genetic depletion of DUSP-MKPs can reduce tumorigenicity, suggesting that hyperactivating MAPK signaling by DUSP-MKP inhibitors could be a novel strategy to selectively affect the transformed phenotype. Through in vivo structure activity relationship studies in transgenic zebrafish we recently identified a hyperactivator of Fibroblast Growth Factor signaling (BCI-215) that is devoid of developmental toxicity and restores defective MAPK activity caused by overexpression of DUSP1 and DUSP6 in mammalian cells...
February 2, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28146470/rare-and-low-frequency-coding-variants-alter-human-adult-height
#7
Eirini Marouli, Mariaelisa Graff, Carolina Medina-Gomez, Ken Sin Lo, Andrew R Wood, Troels R Kjaer, Rebecca S Fine, Yingchang Lu, Claudia Schurmann, Heather M Highland, Sina Rüeger, Gudmar Thorleifsson, Anne E Justice, David Lamparter, Kathleen E Stirrups, Valérie Turcot, Kristin L Young, Thomas W Winkler, Tõnu Esko, Tugce Karaderi, Adam E Locke, Nicholas G D Masca, Maggie C Y Ng, Poorva Mudgal, Manuel A Rivas, Sailaja Vedantam, Anubha Mahajan, Xiuqing Guo, Goncalo Abecasis, Katja K Aben, Linda S Adair, Dewan S Alam, Eva Albrecht, Kristine H Allin, Matthew Allison, Philippe Amouyel, Emil V Appel, Dominique Arveiler, Folkert W Asselbergs, Paul L Auer, Beverley Balkau, Bernhard Banas, Lia E Bang, Marianne Benn, Sven Bergmann, Lawrence F Bielak, Matthias Blüher, Heiner Boeing, Eric Boerwinkle, Carsten A Böger, Lori L Bonnycastle, Jette Bork-Jensen, Michiel L Bots, Erwin P Bottinger, Donald W Bowden, Ivan Brandslund, Gerome Breen, Murray H Brilliant, Linda Broer, Amber A Burt, Adam S Butterworth, David J Carey, Mark J Caulfield, John C Chambers, Daniel I Chasman, Yii-Der Ida Chen, Rajiv Chowdhury, Cramer Christensen, Audrey Y Chu, Massimiliano Cocca, Francis S Collins, James P Cook, Janie Corley, Jordi Corominas Galbany, Amanda J Cox, Gabriel Cuellar-Partida, John Danesh, Gail Davies, Paul I W de Bakker, Gert J de Borst, Simon de Denus, Mark C H de Groot, Renée de Mutsert, Ian J Deary, George Dedoussis, Ellen W Demerath, Anneke I den Hollander, Joe G Dennis, Emanuele Di Angelantonio, Fotios Drenos, Mengmeng Du, Alison M Dunning, Douglas F Easton, Tapani Ebeling, Todd L Edwards, Patrick T Ellinor, Paul Elliott, Evangelos Evangelou, Aliki-Eleni Farmaki, Jessica D Faul, Mary F Feitosa, Shuang Feng, Ele Ferrannini, Marco M Ferrario, Jean Ferrieres, Jose C Florez, Ian Ford, Myriam Fornage, Paul W Franks, Ruth Frikke-Schmidt, Tessel E Galesloot, Wei Gan, Ilaria Gandin, Paolo Gasparini, Vilmantas Giedraitis, Ayush Giri, Giorgia Girotto, Scott D Gordon, Penny Gordon-Larsen, Mathias Gorski, Niels Grarup, Megan L Grove, Vilmundur Gudnason, Stefan Gustafsson, Torben Hansen, Kathleen Mullan Harris, Tamara B Harris, Andrew T Hattersley, Caroline Hayward, Liang He, Iris M Heid, Kauko Heikkilä, Øyvind Helgeland, Jussi Hernesniemi, Alex W Hewitt, Lynne J Hocking, Mette Hollensted, Oddgeir L Holmen, G Kees Hovingh, Joanna M M Howson, Carel B Hoyng, Paul L Huang, Kristian Hveem, M Arfan Ikram, Erik Ingelsson, Anne U Jackson, Jan-Håkan Jansson, Gail P Jarvik, Gorm B Jensen, Min A Jhun, Yucheng Jia, Xuejuan Jiang, Stefan Johansson, Marit E Jørgensen, Torben Jørgensen, Pekka Jousilahti, J Wouter Jukema, Bratati Kahali, René S Kahn, Mika Kähönen, Pia R Kamstrup, Stavroula Kanoni, Jaakko Kaprio, Maria Karaleftheri, Sharon L R Kardia, Fredrik Karpe, Frank Kee, Renske Keeman, Lambertus A Kiemeney, Hidetoshi Kitajima, Kirsten B Kluivers, Thomas Kocher, Pirjo Komulainen, Jukka Kontto, Jaspal S Kooner, Charles Kooperberg, Peter Kovacs, Jennifer Kriebel, Helena Kuivaniemi, Sébastien Küry, Johanna Kuusisto, Martina La Bianca, Markku Laakso, Timo A Lakka, Ethan M Lange, Leslie A Lange, Carl D Langefeld, Claudia Langenberg, Eric B Larson, I-Te Lee, Terho Lehtimäki, Cora E Lewis, Huaixing Li, Jin Li, Ruifang Li-Gao, Honghuang Lin, Li-An Lin, Xu Lin, Lars Lind, Jaana Lindström, Allan Linneberg, Yeheng Liu, Yongmei Liu, Artitaya Lophatananon, Jian'an Luan, Steven A Lubitz, Leo-Pekka Lyytikäinen, David A Mackey, Pamela A F Madden, Alisa K Manning, Satu Männistö, Gaëlle Marenne, Jonathan Marten, Nicholas G Martin, Angela L Mazul, Karina Meidtner, Andres Metspalu, Paul Mitchell, Karen L Mohlke, Dennis O Mook-Kanamori, Anna Morgan, Andrew D Morris, Andrew P Morris, Martina Müller-Nurasyid, Patricia B Munroe, Mike A Nalls, Matthias Nauck, Christopher P Nelson, Matt Neville, Sune F Nielsen, Kjell Nikus, Pål R Njølstad, Børge G Nordestgaard, Ioanna Ntalla, Jeffrey R O'Connel, Heikki Oksa, Loes M Olde Loohuis, Roel A Ophoff, Katharine R Owen, Chris J Packard, Sandosh Padmanabhan, Colin N A Palmer, Gerard Pasterkamp, Aniruddh P Patel, Alison Pattie, Oluf Pedersen, Peggy L Peissig, Gina M Peloso, Craig E Pennell, Markus Perola, James A Perry, John R B Perry, Thomas N Person, Ailith Pirie, Ozren Polasek, Danielle Posthuma, Olli T Raitakari, Asif Rasheed, Rainer Rauramaa, Dermot F Reilly, Alex P Reiner, Frida Renström, Paul M Ridker, John D Rioux, Neil Robertson, Antonietta Robino, Olov Rolandsson, Igor Rudan, Katherine S Ruth, Danish Saleheen, Veikko Salomaa, Nilesh J Samani, Kevin Sandow, Yadav Sapkota, Naveed Sattar, Marjanka K Schmidt, Pamela J Schreiner, Matthias B Schulze, Robert A Scott, Marcelo P Segura-Lepe, Svati Shah, Xueling Sim, Suthesh Sivapalaratnam, Kerrin S Small, Albert Vernon Smith, Jennifer A Smith, Lorraine Southam, Timothy D Spector, Elizabeth K Speliotes, John M Starr, Valgerdur Steinthorsdottir, Heather M Stringham, Michael Stumvoll, Praveen Surendran, Leen M 't Hart, Katherine E Tansey, Jean-Claude Tardif, Kent D Taylor, Alexander Teumer, Deborah J Thompson, Unnur Thorsteinsdottir, Betina H Thuesen, Anke Tönjes, Gerard Tromp, Stella Trompet, Emmanouil Tsafantakis, Jaakko Tuomilehto, Anne Tybjaerg-Hansen, Jonathan P Tyrer, Rudolf Uher, André G Uitterlinden, Sheila Ulivi, Sander W van der Laan, Andries R Van Der Leij, Cornelia M van Duijn, Natasja M van Schoor, Jessica van Setten, Anette Varbo, Tibor V Varga, Rohit Varma, Digna R Velez Edwards, Sita H Vermeulen, Henrik Vestergaard, Veronique Vitart, Thomas F Vogt, Diego Vozzi, Mark Walker, Feijie Wang, Carol A Wang, Shuai Wang, Yiqin Wang, Nicholas J Wareham, Helen R Warren, Jennifer Wessel, Sara M Willems, James G Wilson, Daniel R Witte, Michael O Woods, Ying Wu, Hanieh Yaghootkar, Jie Yao, Pang Yao, Laura M Yerges-Armstrong, Robin Young, Eleftheria Zeggini, Xiaowei Zhan, Weihua Zhang, Jing Hua Zhao, Wei Zhao, Wei Zhao, He Zheng, Wei Zhou, Jerome I Rotter, Michael Boehnke, Sekar Kathiresan, Mark I McCarthy, Cristen J Willer, Kari Stefansson, Ingrid B Borecki, Dajiang J Liu, Kari E North, Nancy L Heard-Costa, Tune H Pers, Cecilia M Lindgren, Claus Oxvig, Zoltán Kutalik, Fernando Rivadeneira, Ruth J F Loos, Timothy M Frayling, Joel N Hirschhorn, Panos Deloukas, Guillaume Lettre
Height is a highly heritable, classic polygenic trait with approximately 700 common associated variants identified through genome-wide association studies so far. Here, we report 83 height-associated coding variants with lower minor-allele frequencies (in the range of 0.1-4.8%) and effects of up to 2 centimetres per allele (such as those in IHH, STC2, AR and CRISPLD2), greater than ten times the average effect of common variants. In functional follow-up studies, rare height-increasing alleles of STC2 (giving an increase of 1-2 centimetres per allele) compromised proteolytic inhibition of PAPP-A and increased cleavage of IGFBP-4 in vitro, resulting in higher bioavailability of insulin-like growth factors...
February 9, 2017: Nature
https://www.readbyqxmd.com/read/28143765/functional-expression-of-plant-derived-o-methyltransferase-flavanone-3-hydroxylase-and-flavonol-synthase-in-corynebacterium-glutamicum-for-production-of-pterostilbene-kaempferol-and-quercetin
#8
Nicolai Kallscheuer, Michael Vogt, Michael Bott, Jan Marienhagen
Plant polyphenols receive significant attention due to their anti-oxidative and health-promoting properties, and several microorganisms are currently engineered towards producing these valuable compounds. Previously, Corynebacterium glutamicum has been engineered for synthesizing polyphenol core structures such as the stilbene resveratrol and the (2S)-flavanone naringenin. Decoration of these compounds by O-methylation or hydroxylation would provide access to polyphenols of even higher commercial interest. In this study, introduction of a heterologous O-methyltransferase into a resveratrol-producing C...
January 28, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28128342/primary-human-placental-trophoblasts-are-permissive-for-zika-virus-zikv-replication
#9
Kjersti M Aagaard, Anismrita Lahon, Melissa A Suter, Ravi P Arya, Maxim D Seferovic, Megan B Vogt, Min Hu, Fabio Stossi, Michael A Mancini, R Alan Harris, Maike Kahr, Catherine Eppes, Martha Rac, Michael A Belfort, Chun Shik Park, Daniel Lacorazza, Rebecca Rico-Hesse
Zika virus (ZIKV) is an emerging mosquito-borne (Aedes genus) arbovirus of the Flaviviridae family. Although ZIKV has been predominately associated with a mild or asymptomatic dengue-like disease, its appearance in the Americas has been accompanied by a multi-fold increase in reported incidence of fetal microcephaly and brain malformations. The source and mode of vertical transmission from mother to fetus is presumptively transplacental, although a causal link explaining the interval delay between maternal symptoms and observed fetal malformations following infection has been missing...
January 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28125695/novel-mutant-aav2-rep-proteins-support-aav2-replication-without-blocking-hsv-1-helpervirus-replication
#10
Michael Seyffert, Daniel L Glauser, Elisabeth M Schraner, Anna-Paula de Oliveira, Jorge Mansilla-Soto, Bernd Vogt, Hildegard Büning, R Michael Linden, Mathias Ackermann, Cornel Fraefel
As their names imply, parvoviruses of the genus Dependovirus rely for their efficient replication on the concurrent presence of a helpervirus, such as herpesvirus, adenovirus, or papilloma virus. Adeno-associated virus 2 (AAV2) is such an example, which in turn can efficiently inhibit the replication of each helpervirus by distinct mechanisms. In a previous study we have shown that expression of the AAV2 rep gene is not compatible with efficient replication of herpes simplex virus 1 (HSV-1). In particular, the combined DNA-binding and ATPase/helicase activities of the Rep68/78 proteins have been shown to exert opposite effects on the replication of AAV2 and HSV-1...
2017: PloS One
https://www.readbyqxmd.com/read/28121776/collaborative-public-health-investigation-of-clenbuterol-adulterated-heroin-outbreak-richmond-virginia-march-april-2015
#11
Brigette Gleason, Angela West, Danny Avula, Okey Utah, Marshall Vogt, Kirk Cumpston, Michael Kelly, Paul Brasler, Shane Wyatt, Laurie Forlano
CONTEXT: In March 2015, the Virginia Department of Health (VDH) was alerted by the Virginia Poison Center of a 6-patient cluster treated for severe clinical presentations after using heroin. Patients' symptoms were atypical for heroin use, and concern existed that patients were exposed to heroin that had been adulterated with or replaced by another substance. OBJECTIVE: To understand the extent and characterization of the outbreak and implement response measures to prevent further cases...
March 2017: Journal of Public Health Management and Practice: JPHMP
https://www.readbyqxmd.com/read/28121368/pharmacokinetics-and-pharmacodynamics-of-single-doses-of-rivaroxaban-in-obese-patients-before-and-after-bariatric-surgery
#12
Dino Kröll, Guido Stirnimann, Andreas Vogt, Desirée Lin Lee Lai, Yves Michael Borbély, Julia Altmeier, Sabine Schädelin, Daniel Candinas, Lorenzo Alberio, Philipp C Nett
AIMS: Venous thromboembolism is an important cause of postoperative morbidity and mortality in bariatric surgery. Studies of direct oral anticoagulants (DOACs) are not available in this surgical field. The objective of this phase 1 clinical trial was to investigate pharmacokinetic and pharmacodynamic (PK/PD) parameters of rivaroxaban in bariatric patients. METHODS: In this single-centre study, obese patients received single oral doses of rivaroxaban (10 mg) one day before and three days after bariatric surgery...
January 25, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28113546/magnetic-particle-imaging-a-resovist-based-marking-technology-for-guide-wires-and-catheters-for-vascular-interventions
#13
Julian Haegele, Sjef Cremers, Jurgen Rahmer, Jochen Franke, Sarah Vaalma, Michael Heidenreich, Joern Borgert, Paul Borm, Joerg Barkhausen, Florian Vogt
Magnetic Particle Imaging (MPI) is able to provide high temporal and good spatial resolution, high signal to noise ratio and sensitivity. Furthermore, it is a truly quantitative method as its signal strength is proportional to the concentration of its tracer, superparamagnetic iron oxide nanoparticles (SPIOs), over a wide range practically relevant concentrations. Thus, MPI is proposed as a promising future method for guidance of vascular interventions. To implement this, devices such as guide wires and catheters have to be discernible in MPI, which can be achieved by coating already commercially available devices with SPIOs...
April 27, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28107215/metabolic-cardiac-and-renal-effects-of-the-slow-hydrogen-sulfide-releasing-molecule-gyy4137-during-resuscitated-septic-shock-in-swine-with-pre-existing-coronary-artery-disease
#14
Benedikt L Nubaum, Josef Vogt, Ulrich Wachter, Oscar McCook, Martin Wepler, José Matallo, Enrico Calzia, Michael Gröger, Michael Georgieff, Mark E Wood, Matthew Whiteman, Peter Radermacher, Sebastian Hafner
Decreased levels of endogenous hydrogen sulfide (H2S) contribute to atherosclerosis, whereas equivocal data are available on H2S effects during sepsis. Moreover, H2S improved glucose utilization in anaesthetized, ventilated, hypothermic mice, but normothermia and/or sepsis blunted this effect. The metabolic effects of H2S in large animals are controversial. Therefore, we investigated the effects of the H2S donor GYY4137 during resuscitated, fecal peritonitis-induced septic shock in swine with genetically and diet-induced coronary artery disease (CAD)...
January 19, 2017: Shock
https://www.readbyqxmd.com/read/28077513/cognitive-control-structures-in-the-imitation-learning-of-spatial-sequences-and-rhythms-an-fmri-study
#15
Katrin Sakreida, Satomi Higuchi, Cinzia Di Dio, Michael Ziessler, Martine Turgeon, Neil Roberts, Stefan Vogt
Imitation learning involves the acquisition of novel motor patterns based on action observation (AO). We used event-related functional magnetic resonance imaging to study the imitation learning of spatial sequences and rhythms during AO, motor imagery (MI), and imitative execution in nonmusicians and musicians. While both tasks engaged the fronto-parietal mirror circuit, the spatial sequence task recruited posterior parietal and dorsal premotor regions more strongly. The rhythm task involved an additional network for auditory working memory...
January 10, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28049497/two-differentially-structured-collagen-scaffolds-for-potential-urinary-bladder-augmentation-proof-of-concept-study-in-a-g%C3%A3-ttingen-minipig-model
#16
Dorothea Leonhäuser, Katja Stollenwerk, Volker Seifarth, Isabella M Zraik, Michael Vogt, Pramod K Srinivasan, Rene H Tolba, Joachim O Grosse
BACKGROUND: The repair of urinary bladder tissue is a necessity for tissue loss due to cancer, trauma, or congenital abnormalities. Use of intestinal tissue is still the gold standard in the urological clinic, which leads to new problems and dysfunctions like mucus production, stone formation, and finally malignancies. Therefore, the use of artificial, biologically derived materials is a promising step towards the augmentation of this specialised tissue. The aim of this study was to investigate potential bladder wall repair by two collagen scaffold prototypes, OptiMaix 2D and 3D, naïve and seeded with autologous vesical cells, as potential bladder wall substitute material in a large animal model...
January 4, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28009569/x-ray-fluorescence-at-nanoscale-resolution-for-multicomponent-layered-structures-a-solar-cell-case%C3%A2-study
#17
Bradley M West, Michael Stuckelberger, April Jeffries, Srikanth Gangam, Barry Lai, Benjamin Stripe, Jörg Maser, Volker Rose, Stefan Vogt, Mariana I Bertoni
The study of a multilayered and multicomponent system by spatially resolved X-ray fluorescence microscopy poses unique challenges in achieving accurate quantification of elemental distributions. This is particularly true for the quantification of materials with high X-ray attenuation coefficients, depth-dependent composition variations and thickness variations. A widely applicable procedure for use after spectrum fitting and quantification is described. This procedure corrects the elemental distribution from the measured fluorescence signal, taking into account attenuation of the incident beam and generated fluorescence from multiple layers, and accounts for sample thickness variations...
January 1, 2017: Journal of Synchrotron Radiation
https://www.readbyqxmd.com/read/27936616/a-novel-synthetic-pathway-enables-microbial-production-of-polyphenols-independent-from-the-endogenous-aromatic-amino-acid-metabolism
#18
Nicolai Kallscheuer, Michael Vogt, Jan Marienhagen
Numerous plant polyphenols have potential applications as pharmaceuticals or nutraceuticals. Stilbenes and flavonoids as most abundant polyphenols are synthesized from phenylpropanoids, which are exclusively derived from aromatic amino acids in nature. Several microorganisms were engineered for the synthesis of biotechnologically interesting plant polyphenols; however, low activity of heterologous ammonia lyases, linking endogenous microbial aromatic amino acid biosynthesis to phenylpropanoid synthesis, turned out to be the limiting step during microbial synthesis...
December 14, 2016: ACS Synthetic Biology
https://www.readbyqxmd.com/read/27895155/investigations-of-glucocorticoid-action-in-gn
#19
Christoph Kuppe, Claudia van Roeyen, Katja Leuchtle, Nazanin Kabgani, Michael Vogt, Marc Van Zandvoort, Bart Smeets, Jürgen Floege, Hermann-Josef Gröne, Marcus J Moeller
For several decades, glucocorticoids have been used empirically to treat rapid progressive GN. It is commonly assumed that glucocorticoids act primarily by dampening the immune response, but the mechanisms remain incompletely understood. In this study, we inactivated the glucocorticoid receptor (GR) specifically in kidney epithelial cells using Pax8-Cre/GR(fl/fl) mice. Pax8-Cre/GR(fl/fl) mice did not exhibit an overt spontaneous phenotype. In mice treated with nephrotoxic serum to induce crescentic nephritis (rapidly progressive GN), this genetic inactivation of the GR in kidney epithelial cells exerted renal benefits, including inhibition of albuminuria and cellular crescent formation, similar to the renal benefits observed with high-dose prednisolone in control mice...
November 28, 2016: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/27889953/ecology-under-lake-ice
#20
REVIEW
Stephanie E Hampton, Aaron W E Galloway, Stephen M Powers, Ted Ozersky, Kara H Woo, Ryan D Batt, Stephanie G Labou, Catherine M O'Reilly, Sapna Sharma, Noah R Lottig, Emily H Stanley, Rebecca L North, Jason D Stockwell, Rita Adrian, Gesa A Weyhenmeyer, Lauri Arvola, Helen M Baulch, Isabella Bertani, Larry L Bowman, Cayelan C Carey, Jordi Catalan, William Colom-Montero, Leah M Domine, Marisol Felip, Ignacio Granados, Corinna Gries, Hans-Peter Grossart, Juta Haberman, Marina Haldna, Brian Hayden, Scott N Higgins, Jeff C Jolley, Kimmo K Kahilainen, Enn Kaup, Michael J Kehoe, Sally MacIntyre, Anson W Mackay, Heather L Mariash, Robert M McKay, Brigitte Nixdorf, Peeter Nõges, Tiina Nõges, Michelle Palmer, Don C Pierson, David M Post, Matthew J Pruett, Milla Rautio, Jordan S Read, Sarah L Roberts, Jacqueline Rücker, Steven Sadro, Eugene A Silow, Derek E Smith, Robert W Sterner, George E A Swann, Maxim A Timofeyev, Manuel Toro, Michael R Twiss, Richard J Vogt, Susan B Watson, Erika J Whiteford, Marguerite A Xenopoulos
Winter conditions are rapidly changing in temperate ecosystems, particularly for those that experience periods of snow and ice cover. Relatively little is known of winter ecology in these systems, due to a historical research focus on summer 'growing seasons'. We executed the first global quantitative synthesis on under-ice lake ecology, including 36 abiotic and biotic variables from 42 research groups and 101 lakes, examining seasonal differences and connections as well as how seasonal differences vary with geophysical factors...
January 2017: Ecology Letters
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