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https://www.readbyqxmd.com/read/28547120/enzymatic-characterization-of-fructose-1-6-bisphosphatase-ii-from-francisella-tularensis-an-essential-enzyme-for-pathogenesis
#1
Hiten J Gutka, Nina M Wolf, Jasper Marc G Bondoc, Farahnaz Movahedzadeh
The glpX gene from Francisella tularensis encodes for the class II fructose 1,6-bisphosphatase (FBPaseII) enzyme. The glpX gene has been verified to be essential in F. tularensis, and the inactivation of this gene leads to impaired bacterial growth on gluconeogenic substrates. In the present work, we have complemented a ∆glpX mutant of Escherichia coli with the glpX gene of F. tularensis (FTF1631c). Our complementation work independently verifies that the glpX gene (FTF1631c) in F. tularensis is indeed an FBPase and supports the growth of the ΔglpX E...
May 25, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28541273/nonlinear-mechanics-of-hybrid-polymer-networks-that-mimic-the-complex-mechanical-environment-of-cells
#2
Maarten Jaspers, Sarah L Vaessen, Pim van Schayik, Dion Voerman, Alan E Rowan, Paul H J Kouwer
The mechanical properties of cells and the extracellular environment they reside in are governed by a complex interplay of biopolymers. These biopolymers, which possess a wide range of stiffnesses, self-assemble into fibrous composite networks such as the cytoskeleton and extracellular matrix. They interact with each other both physically and chemically to create a highly responsive and adaptive mechanical environment that stiffens when stressed or strained. Here we show that hybrid networks of a synthetic mimic of biological networks and either stiff, flexible and semi-flexible components, even very low concentrations of these added components, strongly affect the network stiffness and/or its strain-responsive character...
May 25, 2017: Nature Communications
https://www.readbyqxmd.com/read/28540445/indications-for-kidney-biopsy-in-idiopathic-childhood-nephrotic-syndrome
#3
Alanoud Alshami, Abishek Roshan, Marisa Catapang, Jasper J Jöbsis, Trevor Kwok, Nonnie Polderman, Jennifer Sibley, Matt Sibley, Cherry Mammen, Douglas G Matsell
BACKGROUND: Most cases of childhood nephrotic syndrome (NS) are due to minimal change disease (MCD), while a minority of children have focal segmental glomerulosclerosis (FSGS) and an unfavorable clinical course, requiring a kidney biopsy to confirm diagnosis. We hypothesized that clinical characteristics at diagnosis and initial response to corticosteroid treatment accurately predict FSGS and can be used to guide consistent practice in the indications for kidney biopsy. METHODS: This was a case control study (1990-2012)...
May 24, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28538093/toxic-byproduct-formation-during-electrochemical-treatment-of-latrine-wastewater
#4
Justin T Jasper, Yang Yang, Michael R Hoffmann
Electrochemical systems are an attractive option for onsite latrine wastewater treatment due to their high efficiency and small footprint. While concerns remain over formation of toxic byproducts during treatment, rigorous studies examining byproduct formation are lacking. Experiments treating authentic latrine wastewater over variable treatment times, current densities, chloride concentrations, and anode materials were conducted to characterize byproducts and identify conditions that minimize their formation...
May 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28536040/the-flir-one-thermal-imager-for-the-assessment-of-burn-wounds-reliability-and-validity-study
#5
M E H Jaspers, M E Carrière, A Meij-de Vries, J H G M Klaessens, P P M van Zuijlen
BACKGROUND: Objective measurement tools may be of great value to provide early and reliable burn wound assessment. Thermal imaging is an easy, accessible and objective technique, which measures skin temperature as an indicator of tissue perfusion. These thermal images might be helpful in the assessment of burn wounds. However, before implementation of a novel measurement tool into clinical practice is considered, it is appropriate to test its clinimetric properties (i.e. reliability and validity)...
May 20, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28535992/impact-of-pharmacokinetic-pharmacodynamic-modelling-in-early-clinical-drug-development
#6
Jasper Dingemanse, Andreas Krause
Early clinical pharmacology studies in healthy subjects are often dissociated from patient studies. In this review we encourage the use of modelling and simulation techniques to generate valuable information at an early stage of clinical development. We illustrate these principles by presenting 5 different case studies from a spectrum of therapeutic drug classes. Their application leads to a better understanding of drug characteristics early on, thereby facilitating the design of dose-finding studies in the target patient population and saving resources...
May 20, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28532918/subarachnoid-haemorrhage-in-germany-between-2010-2013-estimated-incidence-rates-based-on-a-nationwide-hospital-discharge-registry
#7
Jasper H van Lieshout, Igor Fischer, Marcel A Kamp, A R T Donders, Jan F Cornelius, Hans-Jakob Steiger, Hieronymus D Boogaarts, Athanasios K Petridis
BACKGROUND: Nordic countries are the primary source for nationwide data on the incidence of subarachnoid haemorrhage (SAH). Reliable estimates of national incidence rates of SAH in other countries are lacking, yet studies from Nordic countries with exceptional incidence rate are sometimes disregarded because of concerns regarding external validity. Autopsies are rarely performed for sudden deaths, therefore estimates of the SAH incidence commonly reflect the hospital discharge rates. Our aim was to estimate the nationwide incidence of non-traumatic SAH in Germany using a national hospital discharge register...
May 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28531219/pyldm-an-open-source-package-for-lifetime-density-analysis-of-time-resolved-spectroscopic-data
#8
Gabriel F Dorlhiac, Clyde Fare, Jasper J van Thor
Ultrafast spectroscopy offers temporal resolution for probing processes in the femto- and picosecond regimes. This has allowed for investigation of energy and charge transfer in numerous photoactive compounds and complexes. However, analysis of the resultant data can be complicated, particularly in more complex biological systems, such as photosystems. Historically, the dual approach of global analysis and target modelling has been used to elucidate kinetic descriptions of the system, and the identity of transient species respectively...
May 22, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28530852/long-term-risk-of-subsequent-malignant-neoplasms-after-treatment-of-childhood-cancer-in-the-dcog-later-study-cohort-role-of-chemotherapy
#9
Jop C Teepen, Flora E van Leeuwen, Wim J Tissing, Eline van Dulmen-den Broeder, Marry M van den Heuvel-Eibrink, Helena J van der Pal, Jacqueline J Loonen, Dorine Bresters, Birgitta Versluys, Sebastian J C M M Neggers, Monique W M Jaspers, Michael Hauptmann, Margriet van der Heiden-van der Loo, Otto Visser, Leontien C M Kremer, Cécile M Ronckers
Purpose Childhood cancer survivors (CCSs) are at increased risk for subsequent malignant neoplasms (SMNs). We evaluated the long-term risk of SMNs in a well-characterized cohort of 5-year CCSs, with a particular focus on individual chemotherapeutic agents and solid cancer risk. Methods The Dutch Childhood Cancer Oncology Group-Long-Term Effects After Childhood Cancer cohort includes 6,165 5-year CCSs diagnosed between 1963 and 2001 in the Netherlands. SMNs were identified by linkages with the Netherlands Cancer Registry, the Dutch Pathology Registry, and medical chart review...
May 22, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28528173/school-wellness-team-best-practices-to-promote-wellness-policy-implementation
#10
Erika Profili, Diana S Rubio, Hannah G Lane, Lea H Jaspers, Megan S Lopes, Maureen M Black, Erin R Hager
Schools with wellness teams are more likely to implement federally mandated Local Wellness Policies (LWPs, Local Education Agency-level policies for healthy eating/physical activity). Best practices have been developed for wellness teams based on minimal empirical evidence. The purpose of this study is to determine, among schools with wellness teams, associations between LWP implementation and six wellness team best practices (individually and as a sum score). An online survey targeting Maryland school wellness leaders/administrators (52...
May 17, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28526796/sulfide-induced-dissimilatory-nitrate-reduction-to-ammonium-supports-anammox-in-an-open-water-unit-process-wetland
#11
Zackary L Jones, Justin T Jasper, David L Sedlak, Jonathan O Sharp
Open-water unit process wetlands host a benthic diatomaceous and bacterial assemblage capable of nitrate removal from treated municipal wastewater with unexpected contributions from anammox processes. In exploring mechanistic drivers of anammox, 16S rRNA gene sequencing profiles of the biomat revealed significant microbial community shifts along the flow path and with depth. Notably there was an increasing abundance of sulfate reducers (Desulfococcus and other Deltaproteobacteria) and anammox microorganisms (Brocadiaceae) with depth...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28526028/move-the-neighbourhood-study-design-of-a-community-based-participatory-public-open-space-intervention-in-a-danish-deprived-neighbourhood-to-promote-active-living
#12
Charlotte Skau Pawlowski, Laura Winge, Sidse Carroll, Tanja Schmidt, Anne Margrethe Wagner, Kamilla Pernille Johansen Nørtoft, Bettina Lamm, René Kural, Jasper Schipperijn, Jens Troelsen
BACKGROUND: A limited amount of research has examined the effect of changing public open spaces on active living. This paper will present the study protocol of a community-based intervention study co-designed in an interdisciplinary collaboration with community members to develop urban installations highly tailored to promote active living among children (10-13-years-old) and seniors (>60-years-old) in a deprived neighbourhood in Copenhagen. METHODS: The study builds on a quasi-experimental study design with two sub-studies: 1) a children study and 2) a senior study...
May 19, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28523726/a-distinct-and-genetically-diverse-lineage-of-the-hybrid-fungal-pathogen-verticillium-longisporum-population-causes-stem-striping-in-british-oilseed-rape
#13
Jasper R L Depotter, Michael F Seidl, Grardy C M van den Berg, Bart P H J Thomma, Thomas A Wood
Population genetic structures illustrate evolutionary trajectories of organisms adapting to differential environmental conditions. Verticillium stem striping disease on oilseed rape was mainly observed in continental Europe, but has recently emerged in the United Kingdom. The disease is caused by the hybrid fungal species Verticillium longisporum that originates from at least three separate hybridization events, yet hybrids between Verticillium progenitor species A1 and D1 are mainly responsible for Verticillium stem striping...
May 19, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28522157/antiviral-goes-viral-harnessing-crispr-cas9-to-combat-viruses-in-humans
#14
REVIEW
Jasper Adriaan Soppe, Robert Jan Lebbink
The clustered regularly interspaced short palindromic repeats (CRISPR) and CRISPR-associated (Cas) systems are RNA-guided sequence-specific prokaryotic antiviral immune systems. In prokaryotes, small RNA molecules guide Cas effector endonucleases to invading foreign genetic elements in a sequence-dependent manner, resulting in DNA cleavage by the endonuclease upon target binding. A rewired CRISPR/Cas9 system can be used for targeted and precise genome editing in eukaryotic cells. CRISPR/Cas has also been harnessed to target human pathogenic viruses as a potential new antiviral strategy...
May 15, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/28521880/pharmacokinetics-of-oral-hydrocortisone-results-and-implications-from-a-randomized-controlled-trial
#15
Jorien Werumeus Buning, Daan J Touw, Pauline Brummelman, Robin P F Dullaart, Gerrit van den Berg, Melanie M van der Klauw, Jasper Kamp, Bruce H R Wolffenbuttel, André P van Beek
CONTEXT AND OBJECTIVE: This study aimed at comparing pharmacokinetics of two different doses of hydrocortisone (HC) in patients with secondary adrenal insufficiency (SAI). DESIGN, SETTING AND PATIENTS: Forty-six patients with SAI participated in this randomized double-blind crossover study. INTERVENTION: Patients received two different doses of HC (0.2-0.3mg HC/kg body weight/day and 0.4-0.6mg HC/kg body weight/day). MAIN OUTCOME MEASURES: One- and two-compartment population models for plasma free cortisol, plasma total cortisol and salivary cortisol were parameterized...
June 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28515106/direct-comparison-of-2-rule-out-strategies-for-acute-myocardial-infarction-2-h-accelerated-diagnostic-protocol-vs-2-h-algorithm
#16
Karin Wildi, Louise Cullen, Raphael Twerenbold, Jaimi H Greenslade, William Parsonage, Jasper Boeddinghaus, Thomas Nestelberger, Zaid Sabti, Maria Rubini-Giménez, Christian Puelacher, Janosch Cupa, Lukas Schumacher, Patrick Badertscher, Karin Grimm, Nikola Kozhuharov, Claudia Stelzig, Michael Freese, Katharina Rentsch, Jens Lohrmann, Wanda Kloos, Andreas Buser, Tobias Reichlin, John Pickering, Martin Than, Christian Mueller
BACKGROUND: We compared 2 high-sensitivity cardiac troponin (hs-cTn)-based 2-h strategies in patients presenting with suspected acute myocardial infarction (AMI) to the emergency department (ED): the 2-h accelerated diagnostic protocol (2h-ADP) combining hs-cTn, electrocardiogram, and a risk score, and the 2-h algorithm exclusively based on hs-cTn concentrations and their absolute changes. METHODS: Analyses were performed in 2 independent diagnostic cohorts [European Advantageous Predictors of Acute Coronary Syndrome Evaluation (APACE) study, Australian-New Zealand 2-h Accelerated Diagnostic Protocol to Assess patients with chest Pain symptoms using contemporary Troponins as the only biomarker (ADAPT) study] employing hs-cTnT (Elecsys) and hs-cTnI (Architect)...
May 17, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28512063/influence-of-delayed-gadolinium-enhanced-mri-of-cartilage-dgemric-protocol-on-t2-mapping-is-it-possible-to-comprehensively-assess-knee-cartilage-composition-in-one-post-contrast-mr-examination-at-3-tesla
#17
Joost Verschueren, Jasper van Tiel, Max Reijman, Esther E Bron, Stefan Klein, Jan A N Verhaar, Sita Bierma-Zeinstra, Gabriel P Krestin, Piotr A Wielopolski, Edwin H G Oei
OBJECTIVE: To evaluate the possibility of assessing knee cartilage with T2-mapping and delayed Gadolinium Enhanced MRI of Cartilage (dGEMRIC) in one post-contrast MR examination at 3 Tesla (T). DESIGN: T2 mapping was performed in 10 healthy volunteers at baseline; directly after baseline; after 10 minutes of cycling; and after 90 minutes delay, and in 16 osteoarthritis patients before and after intravenous administration of a double dose gadolinium dimeglumine contrast agent, reflecting key dGEMRIC protocol elements...
May 13, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28509856/first-report-of-a-fatal-case-associated-with-ev-d68-infection-in-hong-kong-and-emergence-of-an-interclade-recombinant-in-china-revealed-by-genome-analysis
#18
Cyril C Y Yip, Janice Y C Lo, Siddharth Sridhar, David C Lung, Shik Luk, Kwok-Hung Chan, Jasper F W Chan, Vincent C C Cheng, Patrick C Y Woo, Kwok-Yung Yuen, Susanna K P Lau
A fatal case associated with enterovirus D68 (EV-D68) infection affecting a 10-year-old boy was reported in Hong Kong in 2014. To examine if a new strain has emerged in Hong Kong, we sequenced the partial genome of the EV-D68 strain identified from the fatal case and the complete VP1, and partial 5'UTR and 2C sequences of nine additional EV-D68 strains isolated from patients in Hong Kong. Sequence analysis indicated that a cluster of strains including the previously recognized A2 strains should belong to a separate clade, clade D, which is further divided into subclades D1 and D2...
May 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28505721/criticality-and-mechanical-enhancement-in-composite-fiber-networks
#19
Jan Maarten van Doorn, Luuk Lageschaar, Joris Sprakel, Jasper van der Gucht
Many biological materials consist of sparse networks of disordered fibers, embedded in a soft elastic matrix. The interplay between rigid and soft elements in such composite networks leads to mechanical properties that can go far beyond the sum of those of the constituents. Here we present lattice-based simulations to unravel the microscopic origins of this mechanical synergy. We show that the competition between fiber stretching and bending and elastic deformations of the matrix gives rise to distinct mechanical regimes, with phase transitions between them that are characterized by critical behavior and diverging strain fluctuations and with different mechanisms leading to mechanical enhancement...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28503171/persistence-of-salmonella-typhimurium-lt2-in-soil-enhanced-after-growth-in-lettuce-medium
#20
Eva Fornefeld, Jasper Schierstaedt, Sven Jechalke, Rita Grosch, Adam Schikora, Kornelia Smalla
The persistence of Salmonella in the environment is influenced by a multitude of biotic and abiotic factors. In addition, its persistence can be influenced by preadaptation before the introduction into the environment. In order to study how preadaptation changes the survival of Salmonella in soil and therefore its potential to colonize the phytosphere, we developed a new medium based on lettuce material [lettuce medium (LM)]. Salmonella enterica serovar Typhimurium strain LT2 was used as a model for Salmonella in this study...
2017: Frontiers in Microbiology
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