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https://www.readbyqxmd.com/read/28944450/review-dynamic-spatial-models-of-parasite-transmission-in-wildlife-their-structure-applications-and-remaining-challenges
#1
REVIEW
L A White, J D Forester, M E Craft
1.Individual differences in contact rate can arise from host, group, and landscape heterogeneity and can result in different patterns of spatial spread for diseases in wildlife populations with concomitant implications for disease control in wildlife of conservation concern, livestock, and humans. While dynamic disease models can provide a better understanding of the drivers of spatial spread, the effects of landscape heterogeneity have only been modelled in a few well-studied wildlife systems such as rabies and bovine tuberculosis...
September 25, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28943992/go-along-interviewing-with-lgbtq-youth-in-canada-and-the-united-states
#2
Carolyn M Porta, Heather L Corliss, Jennifer M Wolowic, Abigail Z Johnson, Katie Fritz Fogel, Amy L Gower, Elizabeth M Saewyc, Marla E Eisenberg
Go-along interviews, which are interviews conducted whilst being in and moving within participant selected spaces, were conducted with 66 LGBTQ adolescents (14-19 years old) in their self-identified communities to explore perceived community attributes, including safe spaces, resources, and supports; this paper highlights methodological lessons learned. Successful recruitment in two countries and varied community settings required partnership with local LGBTQ supporting agencies, including school-based Gay Straight Alliances...
2017: Journal of LGBT Youth
https://www.readbyqxmd.com/read/28943226/influences-of-red-blood-cell-and-platelet-counts-on-the-distribution-and-elimination-of-crystalloid-fluid
#3
Robert G Hahn
BACKGROUND AND OBJECTIVE: A high number of blood cells increases the viscosity of the blood. The present study explored whether variations in blood cell counts are relevant to the distribution and elimination of infused crystalloid fluid. MATERIALS AND METHODS: On three different occasions, 10 healthy male volunteers received an intravenous infusion of 25mL/kg of Ringer's acetate, Ringer's lactate, and isotonic saline over 30min. Blood hemoglobin and urinary excretion were monitored for 4h and used as input in a two-volume kinetic model, using nonlinear mixed effects software...
August 3, 2017: Medicina
https://www.readbyqxmd.com/read/28940386/customizable-de-novo-design-strategies-for-dock-application-to-hivgp41-and-other-therapeutic-targets
#4
William J Allen, Brian C Fochtman, Trent E Balius, Robert C Rizzo
De novo design can be used to explore vast areas of chemical space in computational lead discovery. As a complement to virtual screening, from-scratch construction of molecules is not limited to compounds in pre-existing vendor catalogs. Here, we present an iterative fragment growth method, integrated into the program DOCK, in which new molecules are built using rules for allowable connections based on known molecules. The method leverages DOCK's advanced scoring and pruning approaches and users can define very specific criteria in terms of properties or features to customize growth toward a particular region of chemical space...
September 22, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28938204/natural-outdoor-environments-and-mental-health-stress-as-a-possible-mechanism
#5
Margarita Triguero-Mas, David Donaire-Gonzalez, Edmund Seto, Antònia Valentín, David Martínez, Graham Smith, Gemma Hurst, Glòria Carrasco-Turigas, Daniel Masterson, Magdalena van den Berg, Albert Ambròs, Tania Martínez-Íñiguez, Audrius Dedele, Naomi Ellis, Tomas Grazulevicius, Martin Voorsmit, Marta Cirach, Judith Cirac-Claveras, Wim Swart, Eddy Clasquin, Annemarie Ruijsbroek, Jolanda Maas, Michael Jerret, Regina Gražulevičienė, Hanneke Kruize, Christopher J Gidlow, Mark J Nieuwenhuijsen
INTRODUCTION: Better mental health has been associated with exposure to natural outdoor environments (NOE). However, comprehensive studies including several indicators of exposure and outcomes, potential effect modifiers and mediators are scarce. OBJECTIVES: We used novel, objective measures to explore the relationships between exposure to NOE (i.e. residential availability and contact) and different indicators of mental health, and possible modifiers and mediators...
September 19, 2017: Environmental Research
https://www.readbyqxmd.com/read/28938116/a-unifying-theory-of-branching-morphogenesis
#6
Edouard Hannezo, Colinda L G J Scheele, Mohammad Moad, Nicholas Drogo, Rakesh Heer, Rosemary V Sampogna, Jacco van Rheenen, Benjamin D Simons
The morphogenesis of branched organs remains a subject of abiding interest. Although much is known about the underlying signaling pathways, it remains unclear how macroscopic features of branched organs, including their size, network topology, and spatial patterning, are encoded. Here, we show that, in mouse mammary gland, kidney, and human prostate, these features can be explained quantitatively within a single unifying framework of branching and annihilating random walks. Based on quantitative analyses of large-scale organ reconstructions and proliferation kinetics measurements, we propose that morphogenesis follows from the proliferative activity of equipotent tips that stochastically branch and randomly explore their environment but compete neutrally for space, becoming proliferatively inactive when in proximity with neighboring ducts...
September 21, 2017: Cell
https://www.readbyqxmd.com/read/28937812/predator-perspective-drives-geographic-variation-in-frequency-dependent-polymorphism
#7
Iris A Holmes, Maggie R Grundler, Alison R Davis Rabosky
Color polymorphism in natural populations can manifest as a striking patchwork of phenotypes in space, with neighboring populations characterized by dramatic differences in morph composition. These geographic mosaics can be challenging to explain in the absence of localized selection because they are unlikely to result from simple isolation-by-distance or clinal variation in selective regimes. To identify processes that can lead to the formation of geographic mosaics, we developed a simulation-based model to explore the influence of predator perspective, selection, migration, and genetic linkage of color loci on allele frequencies in polymorphic populations over space and time...
October 2017: American Naturalist
https://www.readbyqxmd.com/read/28935435/subchondral-tibial-bone-texture-predicts-the-incidence-of-radiographic-knee-osteoarthritis-data-from-the-osteoarthritis-initiative
#8
T Janvier, R Jennane, H Toumi, E Lespessailles
OBJECTIVES: To evaluate whether trabecular bone texture (TBT) parameters measured on computed radiographs could predict the onset of radiographic knee osteoarthritis (OA). MATERIALS AND METHODS: Subjects from the Osteoarthritis Initiative with no sign of radiographic OA at baseline were included. Cases that developed either a global radiographic OA defined by the Kellgren-Lawrence (KL) scale, a joint space narrowing (JSN) or tibial osteophytes (TOS) were compared with the controls with no changes after 48 months of follow-up...
September 18, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28934536/glomus-tumor-of-the-sciatic-nerve-an-extraspinal-cause-of-sciatica
#9
Basilia Onyinyechukwu Nwankwo, Robert M Henshaw, Dhruv Kumar
Glomus tumors are small, benign tumors that arise from glomus bodies, structures found normally within the dermis that assist in temperature regulation via their vasoconstrictive response to sympathetic stimuli. Glomus tumors are found typically in the hand and are classically a cause of focal pain and temperature sensitivity. They often present as a small blue lesion seen under the nail bed of a finger or a toe and cause point tenderness. Glomus tumors of peripheral nerves are exceedingly rare and can lead to disability akin to compressive neuropathy when present...
September 21, 2017: Orthopedics
https://www.readbyqxmd.com/read/28933468/self-assembly-of-molecular-ions-via-like-charge-ion-interactions-and-through-space-defined-organic-domains
#10
J S McNally, X P Wang, C Hoffmann, A D Wilson
Reaction stoichiometry, dynamic light scattering, and DFT are used to explore tertiary ammonium bicarbonates that exist as ideal solutes and those that self-assemble. Self-assembling tertiary amines featured organic surfaces beyond a through-space defined sphere around the charge center. Like-charge hydrogen-bonded ion pairs (or anti-electrostatic hydrogen bonding (AEHB)) also play a role in the self-assembly and provide the first evidence of this bonding motif by bicarbonate in aqueous solution. A single crystal neutron structure of a tertiary ammonium bicarbonate featuring a bicarbonate dimer is presented...
September 21, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28932564/assessment-of-pulmonary-microstructural-changes-by-hyperpolarized-129-xe-diffusion-weighted-imaging-in-an-elastase-instilled-rat-model-of-emphysema
#11
Ke Wang, Ting Pan, Hao Yang, Weiwei Ruan, Jianping Zhong, Guangyao Wu, Xin Zhou
BACKGROUND: The purpose of this study was to explore the feasibility of hyperpolarized (129)Xe diffusion-weighted imaging (DWI) for the evaluation of pulmonary microstructural changes in the presence of pancreatic porcine elastase (PPE)-induced pulmonary emphysema rat model. METHODS: Sixteen male Sprague-Dawley (SD) rats were randomly divided into two groups, the emphysema model group and control group. Experimental emphysematous models were made by instilling elastase into rat lungs of model group, the control group were instilled with isodose saline...
August 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28932213/petri-net-based-model-of-helicobacter-pylori-mediated-disruption-of-tight-junction-proteins-in-stomach-lining-during-gastric-carcinoma
#12
Anam Naz, Ayesha Obaid, Faryal M Awan, Aqsa Ikram, Jamil Ahmad, Amjad Ali
Tight junctions help prevent the passage of digestive enzymes and microorganisms through the space between adjacent epithelial cells lining. However, Helicobacter pylori encoded virulence factors negatively regulate these tight junctions and contribute to dysfunction of gastric mucosa. Here, we have predicted the regulation of important tight junction proteins, such as Zonula occludens-1, Claudin-2 and Connexin32 in the presence of pathogenic proteins. Molecular events such as post translational modifications and crosstalk between phosphorylation, O-glycosylation, palmitoylation and methylation are explored which may compromise the integrity of these tight junction proteins...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28931426/effects-of-dosimetric-inadequacy-on-local-control-and-toxicities-in-the-patients-with-t4-nasopharyngeal-carcinoma-extending-into-the-intracranial-space-and-treated-with-intensity-modulated-radiotherapy-plus-chemotherapy
#13
Fen Xue, Chao-Su Hu, Xia-Yun He
BACKGROUND: To protect neurological tissues, underdosing occurs in most cases of T4 nasopharyngeal carcinoma (NPC) with intracranial extension. In this study, we aimed to evaluate the effect of dosimetric inadequacy on local control and late neurological toxicities for patients treated with intensity-modulated radiotherapy (IMRT) plus chemotherapy. METHODS: We prospectively enrolled patients who had non-metastatic T4 NPC with intracranial extension treated between January 2009 and November 2013...
September 20, 2017: Chinese Journal of Cancer
https://www.readbyqxmd.com/read/28931422/pibas-fedsparql-a-web-based-platform-for-integration-and-exploration-of-bioinformatics-datasets
#14
Marija Djokic-Petrovic, Vladimir Cvjetkovic, Jeremy Yang, Marko Zivanovic, David J Wild
BACKGROUND: There are a huge variety of data sources relevant to chemical, biological and pharmacological research, but these data sources are highly siloed and cannot be queried together in a straightforward way. Semantic technologies offer the ability to create links and mappings across datasets and manage them as a single, linked network so that searching can be carried out across datasets, independently of the source. We have developed an application called PIBAS FedSPARQL that uses semantic technologies to allow researchers to carry out such searching across a vast array of data sources...
September 20, 2017: Journal of Biomedical Semantics
https://www.readbyqxmd.com/read/28929756/fragment-based-discovery-and-optimization-of-enzyme-inhibitors-by-docking-of-commercial-chemical-space
#15
Axel Rudling, Robert Gustafsson, Ingrid Almlöf, Evert J Homan, Martin Scobie, Ulrika Warpman Berglund, Thomas Helleday, Pål Stenmark, Jens Carlsson
Fragment-based lead discovery has emerged as a leading drug development strategy for novel therapeutic targets. Despite that fragment-based drug discovery benefits immensely from access to atomic-resolution information, structure-based virtual screening has rarely been used to drive fragment discovery and optimization. Here, molecular docking of 0.3 million fragments to a crystal structure of cancer target MTH1 was performed. Twenty-two predicted fragment ligands, for which analogs could be acquired commercially, were experimentally evaluated...
September 20, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28928936/exploring-differential-evolution-for-inverse-qsar-analysis
#16
Tomoyuki Miyao, Kimito Funatsu, Jürgen Bajorath
Inverse quantitative structure-activity relationship (QSAR) modeling encompasses the generation of compound structures from values of descriptors corresponding to high activity predicted with a given QSAR model. Structure generation proceeds from descriptor coordinates optimized for activity prediction. Herein, we concentrate on the first phase of the inverse QSAR process and introduce a new methodology for coordinate optimization, termed differential evolution (DE), that originated from computer science and engineering...
2017: F1000Research
https://www.readbyqxmd.com/read/28928279/metabolism-in-time-and-space-exploring-the-frontier-of-developmental-biology
#17
REVIEW
Alena Krejci, Jason M Tennessen
Despite the fact that metabolic studies played a prominent role in the early history of developmental biology research, the field of developmental metabolism was largely ignored following the advent of modern molecular biology. Metabolism, however, has recently re-emerged as a focal point of biomedical studies and, as a result, developmental biologists are once again exploring the chemical and energetic forces that shape growth, development and maturation. In May 2017, a diverse group of scientists assembled at the EMBO/EMBL Symposium 'Metabolism in Time and Space' to discuss how metabolism influences cellular and developmental processes...
September 15, 2017: Development
https://www.readbyqxmd.com/read/28926750/land-cover-and-air-pollution-are-associated-with-asthma-hospitalisations-a-cross-sectional-study
#18
Ian Alcock, Mathew White, Mark Cherrie, Benedict Wheeler, Jonathon Taylor, Rachel McInnes, Eveline Otte Im Kampe, Sotiris Vardoulakis, Christophe Sarran, Ireneous Soyiri, Lora Fleming
BACKGROUND: There is increasing policy interest in the potential for vegetation in urban areas to mitigate harmful effects of air pollution on respiratory health. We aimed to quantify relationships between tree and green space density and asthma-related hospitalisations, and explore how these varied with exposure to background air pollution concentrations. METHODS: Population standardised asthma hospitalisation rates (1997-2012) for 26,455 urban residential areas of England were merged with area-level data on vegetation and background air pollutant concentrations...
September 16, 2017: Environment International
https://www.readbyqxmd.com/read/28926708/molecular-nuances-governing-the-self-assembly-of-1-3-2-4-dibenzylidene-d-sorbitol
#19
Andrew Singh, France-Isabelle Auzanneau, Maria G Corradini, Girishma Grover, Richard G Weiss, Michael A Rogers
1,3:2,4 Dibenzylidene-D-sorbitol (DBS) is the gold-standard for low-molecular-weight organogelators (LMOGs). DBS gelates a wide array of solvents, as illustrated by the large Hansen sphere representing gels (2d = 33.5, p = 7.5, and h = 8.7 MPa1/2; radius = 11.2 MPa1/2). Derivatives of DBS have been synthesised to isolate and determine molecular features essential for organogelation. Herein, π-π stacking and hydrogen-bonding are the major non-covalent interactions examined. The importance of π-π stacking was studied using 1,3:2,4 dicyclohexanecarboxylidene-D-sorbitol (DCHS), which eliminates possible π-π stacking, while still conserving the other structural aspects of DBS...
September 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28925938/circulating-micrornas-and-bioinformatics-tools-to-discover-novel-diagnostic-biomarkers-of-pediatric-diseases
#20
REVIEW
Antonella Baldassarre, Cristina Felli, Giorgio Prantera, Andrea Masotti
MicroRNAs (miRNAs) are small noncoding RNAs that regulate gene expression at the post-transcriptional level. Current studies have shown that miRNAs are also present in extracellular spaces, packaged into various membrane-bound vesicles, or associated with RNA-binding proteins. Circulating miRNAs are highly stable and can act as intercellular messengers to affect many physiological processes. MicroRNAs circulating in body fluids have generated strong interest in their potential use as clinical biomarkers. In fact, their remarkable stability and the relative ease of detection make circulating miRNAs ideal tools for rapid and non-invasive diagnosis...
September 19, 2017: Genes
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