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https://www.readbyqxmd.com/read/28812922/a-circulating-micro-rna-signature-serves-as-a-diagnostic-and-prognostic-indicator-in-sarcoidosis
#1
Christian Ascoli, Yue Huang, Cody Schott, Benjamin A Turturice, Ahmed Metwally, David L Perkins, Patricia W Finn
Micro-RNAs (miRNAs) act as post-transcriptional regulators of gene expression. In sarcoidosis, aberrant miRNA expression may enhance immune responses mounted against an unknown antigenic agent. We tested whether a distinct miRNA signature functions as a diagnostic biomarker and explored its role as an immune modulator in sarcoidosis. Expression of miRNAs from peripheral blood mononuclear cells from subjects that met clinical and histopathologic criteria for sarcoidosis were compared to those from matched controls in the ACCESS study...
August 16, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28812884/controlling-bdellovibrio-bacteriovorus-gene-expression-and-predation-using-synthetic-riboswitches
#2
Mohammed Dwidar, Yohei Yokobayashi
Bdellovibrio bacteriovorus is a predatory bacterium that feeds on Gram-negative bacteria including a wide range of pathogens and thus has potential applications as a biocontrol agent. Owing to its unique life cycle, however, there are limited tools that enable genetic manipulation of B. bacteriovorus. This work describes our first steps towards engineering the predatory bacterium for practical applications by developing basic genetic parts to control gene expression. Specifically, we evaluated four robust promoters that are active during the attack phase of B...
August 16, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28812706/a-decade-of-insights-into-grassland-ecosystem-responses-to-global-environmental-change
#3
REVIEW
Elizabeth T Borer, James B Grace, W Stanley Harpole, Andrew S MacDougall, Eric W Seabloom
Earth's biodiversity and carbon uptake by plants, or primary productivity, are intricately interlinked, underlie many essential ecosystem processes, and depend on the interplay among environmental factors, many of which are being changed by human activities. While ecological theory generalizes across taxa and environments, most empirical tests of factors controlling diversity and productivity have been observational, single-site experiments, or meta-analyses, limiting our understanding of variation among site-level responses and tests of general mechanisms...
April 20, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812672/rapid-and-direct-recoveries-of-predators-and-prey-through-synchronized-ecosystem-management
#4
Jameal F Samhouri, Adrian C Stier, Shannon M Hennessey, Mark Novak, Benjamin S Halpern, Phillip S Levin
One of the twenty-first century's greatest environmental challenges is to recover and restore species, habitats and ecosystems. The decision about how to initiate restoration is best-informed by an understanding of the linkages between ecosystem components and, given these linkages, an appreciation of the consequences of choosing to recover one ecosystem component before another. However, it remains difficult to predict how the sequence of species' recoveries within food webs influences the speed and trajectory of restoration, and what that means for human well-being...
March 1, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812662/spending-limited-resources-on-de-extinction-could-lead-to-net-biodiversity-loss
#5
Joseph R Bennett, Richard F Maloney, Tammy E Steeves, James Brazill-Boast, Hugh P Possingham, Philip J Seddon
There is contentious debate surrounding the merits of de-extinction as a biodiversity conservation tool. Here, we use extant analogues to predict conservation actions for potential de-extinction candidate species from New Zealand and the Australian state of New South Wales, and use a prioritization protocol to predict the impacts of reintroducing and maintaining populations of these species on conservation of extant threatened species. Even using the optimistic assumptions that resurrection of species is externally sponsored, and that actions for resurrected species can share costs with extant analogue species, public funding for conservation of resurrected species would lead to fewer extant species that could be conserved, suggesting net biodiversity loss...
March 1, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812625/larval-fish-dispersal-in-a-coral-reef-seascape
#6
Glenn R Almany, Serge Planes, Simon R Thorrold, Michael L Berumen, Michael Bode, Pablo Saenz-Agudelo, Mary C Bonin, Ashley J Frisch, Hugo B Harrison, Vanessa Messmer, Gerrit B Nanninga, Mark A Priest, Maya Srinivasan, Tane Sinclair-Taylor, David H Williamson, Geoffrey P Jones
Larval dispersal is a critical yet enigmatic process in the persistence and productivity of marine metapopulations. Empirical data on larval dispersal remain scarce, hindering the use of spatial management tools in efforts to sustain ocean biodiversity and fisheries. Here we document dispersal among subpopulations of clownfish (Amphiprion percula) and butterflyfish (Chaetodon vagabundus) from eight sites across a large seascape (10,000 km(2)) in Papua New Guinea across 2 years. Dispersal of clownfish was consistent between years, with mean observed dispersal distances of 15 km and 10 km in 2009 and 2011, respectively...
May 8, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812552/competition-along-trajectories-governs-adaptation-rates-towards-antimicrobial-resistance
#7
C Brandon Ogbunugafor, Margaret J Eppstein
The increasing availability of genotype-phenotype maps for different combinations of mutations has empowered evolutionary biologists with the tools to interrogate the predictability of adaptive evolution, especially in the context of the evolution of antimicrobial resistance. Large microbial populations are known to generate competing beneficial mutations, but determining how these mutations contribute to the adaptive trajectories that are most likely to be followed remains a challenge. Despite a recognition that there may also be competition between successive alleles on the same trajectory, prior studies have not fully considered how this impacts adaptation rates along, or likelihood of following, individual trajectories...
November 21, 2016: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812405/simple-screening-tools-predict-death-and-cardiovascular-events-in-patients-with-rheumatic-disease
#8
M Breunig, S Kleinert, S Lehmann, C Kneitz, M Feuchtenberger, H-P Tony, C E Angermann, G Ertl, S Störk
OBJECTIVES: Patients with rheumatic disease (RD) have an increased mortality risk compared with the general population, mainly due to cardiovascular disease (CVD). We aimed to identify patients at high risk of CVD and mortality by comparing three screening tools suitable for clinical practice. METHOD: In this prospective, single-centre study, consecutive patients with rheumatoid arthritis (RA), systemic autoimmune disease (SAI), or spondyloarthritides (SpA) including psoriatic arthritis underwent a comprehensive cardiovascular risk assessment...
August 16, 2017: Scandinavian Journal of Rheumatology
https://www.readbyqxmd.com/read/28812182/rheological-characterization-of-molten-polymer-drug-dispersions-as-a-predictive-tool-for-pharmaceutical-hot-melt-extrusion-processability
#9
Jeroen Van Renterghem, Chris Vervaet, Thomas De Beer
PURPOSE: The aim of this study was to investigate (i) the influence of drug solid-state (crystalline or dissolved in the polymer matrix) on the melt viscosity and (ii) the influence of the drug concentration, temperature and shear rate on polymer crystallization using rheological tests. METHODS: Poly (ethylene oxide) (PEO) (100.000 g/mol) and physical mixtures (PM) containing 10-20-30-40% (w/w) ketoprofen or 10% (w/w) theophylline in PEO were rheologically characterized...
August 15, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28811994/the-measurement-of-liver-fat-from-single-energy-quantitative-computed-tomography-scans
#10
Xiaoguang Cheng, Glen M Blake, J Keenan Brown, Zhe Guo, Jun Zhou, Fengzhe Wang, Liqiang Yang, Xiaohong Wang, Li Xu
BACKGROUND: Studies of soft tissue composition using computed tomography (CT) scans are often semi-quantitative and based on Hounsfield units (HU) measurements that have not been calibrated with a quantitative CT (QCT) phantom. We describe a study to establish the water (H2O) and dipotassium hydrogen phosphate (K2HPO4) basis set equivalent densities of fat and fat-free liver tissue. With this information liver fat can be accurately measured from any abdominal CT scan calibrated with a suitable phantom...
June 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28811883/effect-of-habitat-degradation-on-competition-carrying-capacity-and-species-assemblage-stability
#11
Edoardo Calizza, Maria Letizia Costantini, Giulio Careddu, Loreto Rossi
Changes in species' trophic niches due to habitat degradation can affect intra- and interspecific competition, with implications for biodiversity persistence. Difficulties of measuring species' interactions in the field limit our comprehension of competition outcomes along disturbance gradients. Thus, information on how habitat degradation can destabilize food webs is scarce, hindering predictions regarding responses of multispecies systems to environmental changes. Seagrass ecosystems are undergoing degradation...
August 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28811609/rapid-and-accurate-in-silico-solubility-screening-of-a-monoclonal-antibody-library
#12
Pietro Sormanni, Leanne Amery, Sofia Ekizoglou, Michele Vendruscolo, Bojana Popovic
Antibodies represent essential tools in research and diagnostics and are rapidly growing in importance as therapeutics. Commonly used methods to obtain novel antibodies typically yield several candidates capable of engaging a given target. The development steps that follow, however, are usually performed with only one or few candidates since they can be resource demanding, thereby increasing the risk of failure of the overall antibody discovery program. In particular, insufficient solubility, which may lead to aggregation under typical storage conditions, often hinders the ability of a candidate antibody to be developed and manufactured...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811246/microbial-metagenomics-mock-scenario-based-sample-simulation-m3s3
#13
Yair Motro, Jacob Moran-Gilad
OBJECTIVES: Shotgun sequencing in increasingly applied in clinical microbiology for unbiased culture-independent diagnosis. While software solutions for metagenomics proliferate, integration of metagenomics in clinical care, requires method standardisation and validation. Virtual metagenomics samples could underpin validation by substituting real samples and thus we sought to develop a novel solution for simulation of metagenomics samples based on user-defined clinical scenarios. METHODS: We designed the Microbial Metagenomics Mock Scenario-based Sample Simulation (M3S3) workflow, which allows users to generate virtual samples from raw reads or assemblies...
August 12, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28811201/the-unmet-need-in-rheumatology-reports-from-the-targeted-therapies-meeting-2017
#14
Kevin L Winthrop, Vibeke Strand, Désirée van der Heijde, Philip Mease, Mary Crow, Michael Weinblatt, Joan Bathon, Gerd R Burmester, Maxime Dougados, Johnathan Kay, Xavier Mariette, Ronald Van Vollenhoven, Joachim Sieper, Fritz Melchers, Ferdinand C Breedfeld, Joachim Kalden, Josef S Smolen, Daniel E Furst
The 19th annual international Targeted Therapies meeting brought together over 100 leading basic scientists and clinical researchers from around the world in the field of immunology, molecular biology and rheumatology and other specialties. During the meeting, breakout sessions were held consisting of 5 disease-specific groups with 20-40 experts assigned to each group based on clinical or scientific expertise. Specific groups included: rheumatoid arthritis, psoriatic arthritis, axial spondyloarthritis, systemic lupus erythematous, connective tissue diseases (e...
August 12, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28811131/assessment-of-translational-risk-in-drug-research-role-of-biomarker-classification-and-mechanism-based-pkpd-concepts
#15
Sandra A G Visser, Tjerk J H Bueters
In 2005, Danhof and coauthors proposed a new biomarker classification in the context of the application of mechanism-based PKPD modeling. They defined the term 'biomarker' as a measure that characterizes a drug-induced response, which is on the causal path between drug administration and clinical outcome. The biomarker classification identified seven categories that provide different insights into the kinetics of drug action, such as target site distribution, target engagement, or into the impact of the drug on physiology or disease...
August 12, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28811118/prediction-and-characterization-of-the-stability-enhancing-effect-of-the-cherry-tag%C3%A2-in-highly-concentrated-protein-solutions-by-complex-rheological-measurements-and-md-simulations
#16
Pascal Baumann, Marie-Therese Schermeyer, Hannah Burghardt, Cathrin Dürr, Jonas Gärtner, Jürgen Hubbuch
Solution stability attributes are one of the key parameters within the production and launching phase of new biopharmaceuticals. Instabilities of active biological compounds can reduce the yield of biopharmaceutical productions, and may induce undesired reactions in patients, such as immunogenic rejections. Protein solution stability thus needs to be engineered and monitored throughout production and storage. In contrast to the gold standard of long-term storage experiments applied in industry, novel experimental and in silico molecular dynamics tools for predicting protein solution stability can be applied within several minutes or hours...
August 12, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28811101/chiral-stationary-phase-optimized-selectivity-liquid-chromatography-a-strategy-for-the-separation-of-chiral-isomers
#17
Ravindra Suryakant Hegade, Maarten De Beer, Frederic Lynen
Chiral Stationary-Phase Optimized Selectivity Liquid Chromatography (SOSLC) is proposed as a tool to optimally separate mixtures of enantiomers on a set of commercially available coupled chiral columns. This approach allows for the prediction of the separation profiles on any possible combination of the chiral stationary phases based on a limited number of preliminary analyses, followed by automated selection of the optimal column combination. Both the isocratic and gradient SOSLC approach were implemented for prediction of the retention times for a mixture of 4 chiral pairs on all possible combinations of the 5 commercial chiral columns...
August 2, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28811099/understanding-operational-system-differences-for-transfer-of-miniaturized-chromatography-column-data-using-simulations
#18
William R Keller, Steven T Evans, Gisela Ferreira, David Robbins, Steven M Cramer
In this paper, a simulation tool was employed to identify and appropriately incorporate differences between MiniColumns and benchtop column systems. It was first demonstrated that including multi-step gradients and fraction collection into the simulations resulted in improved agreement between simulated and experimental linear gradient profiles as well as calculated first moments in the MiniColumn experiments. Step elution experiments of binary mixtures (a monoclonal antibody and one of three model proteins) were then carried out to examine comparability of the MiniColumns to the benchtop system...
August 1, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28811054/geographic-modeling-for-children-at-risk-for-home-fires-and-burns
#19
Carlee Lehna, Stephen Furmanek, Erin Fahey, Carol Hanchette
This study developed a predictive model for fires and burns among parents and children in Jefferson County, Kentucky. Eight risk factors for pediatric burns with census tract level data available were identified. Risk factors were synthesized to develop a cartographic model with risk levels low, medium, high, and severe. Validation was performed with fire dispatch data. At-risk areas were concentrated in the county's northwest. Risk was correlated with fire incidence rate (ρ=0.67, p<0.001). Significant risk factors were race (β=0...
August 12, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28810983/evaluation-of-a-novel-field-expedient-musculoskeletal-readiness-screening-tool-in-an-army-basic-training-population
#20
Darren Hearn, Daniel Rhon, Donald Goss, Mark Thelen
BACKGROUND: Musculoskeletal injuries present a significant challenge to military readiness accounting for over 29% of ambulatory medical visits and 25 million limited duty days across the U.S. Army. Although U.S. Military Health Systems perform periodic general health and deployment assessments, there is no validated tool to determine when a service member is at increased risk of sustaining a musculoskeletal injury. METHOD: 292 U.S. Army basic training recruits completed a novel injury screening test called the Musculoskeletal Readiness Screening Tool (MRST)...
July 2017: Military Medicine
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