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https://www.readbyqxmd.com/read/29166759/magnetic-resonance-imaging-assessed-synovial-and-bone-changes-in-hand-and-wrist-joints-of-rheumatoid-arthritis-patients
#1
Kyung-Ann Lee, Sang-Ho Min, Tae-Hyung Kim, Sang-Heon Lee, Hae-Rim Kim
Background/Aims: Magnetic resonance imaging (MRI) is a sensitive and useful method for the detection of synovitis and joint destruction in rheumatoid arthritis (RA) patients. However, the patterns of MRI-detected bone erosion, bone marrow edema (BME), synovitis, and tenosynovitis have received insufficient attention. Therefore, this study evaluated the patterns of bone erosion, BME, synovitis, and tenosynovitis, and calculated the RA-MRI score (RAMRIS) of patients with RA at the carpal and metacarpophalangeal (MCP) joints using MRI...
November 24, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/29166661/ultraconserved-elements-uces-resolve-the-phylogeny-of-australasian-smurf-weevils
#2
Matthew H Van Dam, Athena W Lam, Katayo Sagata, Bradley Gewa, Raymond Laufa, Michael Balke, Brant C Faircloth, Alexander Riedel
Weevils (Curculionoidea) comprise one of the most diverse groups of organisms on earth. There is hardly a vascular plant or plant part without its own species of weevil feeding on it and weevil species diversity is greater than the number of fishes, birds, reptiles, amphibians and mammals combined. Here, we employ ultraconserved elements (UCEs) designed for beetles and a novel partitioning strategy of loci to help resolve phylogenetic relationships within the radiation of Australasian smurf-weevils (Eupholini)...
2017: PloS One
https://www.readbyqxmd.com/read/29166408/estimating-the-impact-of-tuberculosis-anatomical-classification-on-treatment-outcomes-a-patient-and-surveillance-perspective-analysis
#3
Otavio T Ranzani, Laura C Rodrigues, Eliseu A Waldman, Carlos R R Carvalho
INTRODUCTION: Tuberculosis anatomical classification is inconsistent in the literature, which limits current tuberculosis knowledge and control. We aimed to evaluate whether tuberculosis classification impacts on treatment outcomes at patient and aggregate level. METHODS: We analyzed adults from São Paulo State, Brazil with newly diagnosed tuberculosis from 2010-2013. We used an extended clinical classification of tuberculosis, categorizing cases as pulmonary, pulmonary and extrapulmonary, extrapulmonary and miliary/disseminated...
2017: PloS One
https://www.readbyqxmd.com/read/29166301/can-we-train-machine-learning-methods-to-outperform-the-high-dimensional-propensity-score-algorithm
#4
Mohammad Ehsanul Karim, Menglan Pang, Robert W Platt
The use of retrospective healthcare claims datasets is frequently criticized for the lack of complete information on potential confounders. Utilizing patient's health status-related information from claims datasets as surrogates or proxies for mismeasured and unobserved confounders, the high-dimensional propensity score algorithm enables us to reduce bias. Using a previously published cohort study of post-myocardial infarction statin use (1998 - 2012), we compare the performance of the algorithm with a number of popular machine learning approaches for confounder selection in high-dimensional covariate spaces: random forest, least absolute shrinkage and selection operator, and elastic net...
November 18, 2017: Epidemiology
https://www.readbyqxmd.com/read/29166289/a-statistical-method-for-analysing-cospeciation-in-tritrophic-ecology-using-electrical-circuit-theory
#5
Colleen Nooney, Stuart Barber, Arief Gusnanto, Walter R Gilks
We introduce a new method to test efficiently for cospeciation in tritrophic systems. Our method utilises an analogy with electrical circuit theory to reduce higher order systems into bitrophic data sets that retain the information of the original system. We use a sophisticated permutation scheme that weights interactions between two trophic layers based on their connection to the third layer in the system. Our method has several advantages compared to the method of Mramba et al. [Mramba, L. K., S. Barber, K...
November 22, 2017: Statistical Applications in Genetics and Molecular Biology
https://www.readbyqxmd.com/read/29166261/pressure-injury-risk-factors-in-adult-critical-care-patients-a-review-of-the-literature
#6
Jill Cox
Critically ill patients require complex care in a technologically sophisticated environment where they are highly vulnerable to pressure-related injuries. However, pressure injury (PI) development remains a multifactorial phenomenon in critically ill persons; true risk is both pervasive and elusive. The purpose of this comprehensive review of the empirical literature was to examine the risk factors associated with PIs among adult patients admitted to contemporary intensive care units (ICUs). Inclusion criteria stipulated publications were to be peer-reviewed, quantitative studies with a focus on pressure ulcer (PU) risk factors in adult critical care patients published between 2010 and 2016 in which statistical analysis involved multivariate analysis using PU development as the outcome variable...
November 2017: Ostomy/wound Management
https://www.readbyqxmd.com/read/29166061/modeling-hydroxylated-nanosilica-testing-the-performance-of-reaxff-and-ffsioh-force-fields
#7
Antoni Macià Escatllar, Piero Ugliengo, Stefan T Bromley
We analyze the performance of the FFSiOH force field and two parameterisations of the ReaxFF force field for modeling hydroxylated nanoscale silica (SiO2). Such nanosystems are fundamental in numerous aspects of geochemistry and astrochemistry and also play a key role during the hydrothermal synthesis of technologically important nanoporous silicas (e.g., catalysts, absorbents, and coatings). We consider four aspects: structure, relative energies, vibrational spectra, and hydroxylation energies, and compare the results with those from density functional calculations employing a newly defined dataset (HND: Hydroxylated Nanosilica Dataset)...
June 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29165929/spatial-population-genomics-of-the-brown-rat-rattus-norvegicus-in-new-york-city
#8
Matthew Combs, Emily E Puckett, Jonathan Richardson, Destiny Mims, Jason Munshi-South
Human commensal species such as rodent pests are often widely distributed across cities and threaten both infrastructure and public health. Spatially-explicit population genomic methods provide insights into movements for cryptic pests that drive evolutionary connectivity across multiple spatial scales. We examined spatial patterns of neutral genome-wide variation in brown rats (Rattus norvegicus) across Manhattan, New York City (NYC) using 262 samples and 61,401 SNPs to understand: 1) relatedness among nearby individuals and the extent of spatial genetic structure in a discrete urban landscape; 2) the geographic origin of NYC rats, using a large, previously-published dataset of global rat genotypes; and 3) heterogeneity in gene flow across the city, particularly deviations from isolation-by-distance...
November 22, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/29165848/ecological-disturbance-influences-adaptive-divergence-despite-high-gene-flow-in-golden-perch-macquaria-ambigua-implications-for-management-and-resilience-to-climate-change
#9
Catherine R M Attard, Chris J Brauer, Jonathan Sandoval-Castillo, Leanne K Faulks, Peter Unmack, Dean M Gilligan, Luciano B Beheregaray
Populations that are adaptively divergent but maintain high gene flow may have greater resilience to environmental change as gene flow allows the spread of alleles that have already been tested elsewhere. In addition, populations naturally subjected to ecological disturbance may already hold resilience to future environmental change. Confirming this necessitates ecological genomic studies of high dispersal, generalist species. Here we perform one such study on golden perch (Macquaria ambigua) in the Murray-Darling Basin (MDB), Australia using a genome-wide SNP dataset...
November 22, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/29165833/gestational-age-and-child-development-at-age-five-in-a-population-based-cohort-of-australian-aboriginal-and-non-aboriginal-children
#10
Mark Hanly, Kathleen Falster, Georgina Chambers, John Lynch, Emily Banks, Nusrat Homaira, Marni Brownell, Sandra Eades, Louisa Jorm
BACKGROUND: Preterm birth and developmental vulnerability are more common in Australian Aboriginal compared with non-Aboriginal children. We quantified how gestational age relates to developmental vulnerability in both populations. METHODS: Perinatal datasets were linked to the Australian Early Development Census (AEDC), which collects data on five domains, including physical, social, emotional, language/cognitive, and general knowledge/communication development...
November 22, 2017: Paediatric and Perinatal Epidemiology
https://www.readbyqxmd.com/read/29165820/nutrient-limitation-of-terrestrial-free-living-nitrogen-fixation
#11
Katherine A Dynarski, Benjamin Z Houlton
Nitrogen (N) fixation by free-living bacteria is a primary N input pathway in many ecosystems and sustains global plant productivity. Uncertainty exists over the importance of N, phosphorus (P) and molybdenum (Mo) availability in controlling free-living N fixation rates. Here, we investigate the geographic occurrence and variability of nutrient constraints to free-living N fixation in the terrestrial biosphere. We compiled data from studies measuring free-living N fixation in response to N, P and Mo fertilizers...
November 22, 2017: New Phytologist
https://www.readbyqxmd.com/read/29165806/host-preference-and-network-properties-in-biotrophic-plant-fungal-associations
#12
Sergei Põlme, Mohammad Bahram, Hans Jacquemyn, Peter Kennedy, Petr Kohout, Mari Moora, Jane Oja, Maarja Öpik, Lorenzo Pecoraro, Leho Tedersoo
Analytical methods can offer insights into the structure of biological networks, but mechanisms that determine the structure of these networks remain unclear. We conducted a synthesis based on 111 previously published datasets to assess a range of ecological and evolutionary mechanisms that may influence the plant-associated fungal interaction networks. We calculated the relative host effect on fungal community composition and compared nestedness and modularity among different mycorrhizal types and endophytic fungal guilds...
November 22, 2017: New Phytologist
https://www.readbyqxmd.com/read/29165639/human-cancer-tissues-exhibit-reduced-a-to-i-editing-of-mirnas-coupled-with-elevated-editing-of-their-targets
#13
Yishay Pinto, Ilana Buchumenski, Erez Y Levanon, Eli Eisenberg
A-to-I RNA editing is an important post-transcriptional modification, known to be altered in tumors. It targets dozens of sites within miRNAs, some of which impact miRNA biogenesis and function, as well as many miRNA recognition sites. However, the full extent of the effect of editing on regulation by miRNAs and its behavior in human cancers is still unknown. Here we systematically characterized miRNA editing in 10 593 human samples across 32 cancer types and normal controls. We find that the majority of previously reported sites show little to no evidence for editing in this dataset, compile a list of 58 reliable miRNA editing sites, and study them across normal and cancer samples...
November 20, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29165372/pedestrian-detection-with-semantic-regions-of-interest
#14
Miao He, Haibo Luo, Zheng Chang, Bin Hui
For many pedestrian detectors, background vs. foreground errors heavily influence the detection quality. Our main contribution is to design semantic regions of interest that extract the foreground target roughly to reduce the background vs. foreground errors of detectors. First, we generate a pedestrian heat map from the input image with a full convolutional neural network trained on the Caltech Pedestrian Dataset. Next, semantic regions of interest are extracted from the heat map by morphological image processing...
November 22, 2017: Sensors
https://www.readbyqxmd.com/read/29165314/towards-natural-mimetics-of-metformin-and-rapamycin
#15
Alexander Aliper, Leslie Jellen, Franco Cortese, Artem Artemov, Darla Karpinsky-Semper, Alexey Moskalev, Andrew G Swick, Alex Zhavoronkov
Aging is now at the forefront of major challenges faced globally, creating an immediate need for safe, widescale interventions to reduce the burden of chronic disease and extend human healthspan. Metformin and rapamycin are two FDA-approved mTOR inhibitors proposed for this purpose, exhibiting significant anti-cancer and anti-aging properties beyond their current clinical applications. However, each faces issues with approval for off-label, prophylactic use due to adverse effects. Here, we initiate an effort to identify nutraceuticals-safer, naturally-occurring compounds-that mimic the anti-aging effects of metformin and rapamycin without adverse effects...
November 15, 2017: Aging
https://www.readbyqxmd.com/read/29165069/predicting-hepatotoxicity-of-drug-metabolites-via-an-ensemble-approach-based-on-support-cector-machine
#16
Yin Lu, Lili Liu, Dong Lu, Yudong Cai, Mingyue Zheng, Xiaomin Luo, Hualiang Jiang, Kaixian Chen
OBJECTIVE: Drug-induced liver injury (DILI) is a major cause of drug withdrawal. The chemical properties of the drug, especially drug metabolites, play key roles in DILI. Our goal is to construct a QSAR model to predict drug hepatotoxicity based on drug metabolites. MATERIALS AND METHODS: 64 hepatotoxic drug metabolites and 3,339 non-hepatotoxic drug metabolites were gathered from MDL Metabolite Database. Considering the imbalance of the dataset, we randomly split the negative samples and combined each portion with all the positive samples to construct individually balanced datasets for constructing independent classifiers...
November 20, 2017: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/29165067/optimized-virtual-screening-workflow-towards-target-based-polynomial-scoring-functions-for-hiv-1-protease
#17
Val Oliveira Pintro, Walter F Azevedo
BACKGROUND: One key step in the development of inhibitors for an enzyme is the application of computational methodologies to predict protein-ligand interactions. The abundance of structural and ligand-binding information for HIV-1 protease opens up the possibility to apply computational methods to develop scoring functions targeted to this enzyme. OBJECTIVE: Our goal here is to develop an integrated molecular docking approach to investigate protein-ligand interactions with focus on the HIV-1 protease...
November 20, 2017: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/29164493/mapping-quality-of-life-eq-5d-from-dapsa-clinical-dapsa-and-haq-in-psoriatic-arthritis
#18
Tomas Mlcoch, Jan Tuzil, Liliana Sedova, Jiri Stolfa, Monika Urbanova, David Suchy, Andrea Smrzova, Jitka Jircikova, Tereza Hrnciarova, Karel Pavelka, Tomas Dolezal
BACKGROUND: Clinical trials and observational studies lacking measures of health-related quality of life (QoL) are often inapplicable when conducting cost-effectiveness analyses using quality-adjusted life-years (QALYs). The only solution is to map QoL ex post from additionally collected clinical outcomes and generic QoL instruments. Nonetheless, mapping studies are absent in psoriatic arthritis (PsA). METHODS: In this 2-year, prospective, multicentre, non-interventional study of PsA patients, EQ-5D and key clinical parameters such as Disease Activity in PsA (DAPsA), clinical DAPsA (cDAPsA; DAPsA without C-reactive protein [CRP]), and Health Assessment Questionnaire disability index (HAQ) were collected...
November 21, 2017: Patient
https://www.readbyqxmd.com/read/29164467/solid-fuel-use-for-cooking-and-its-health-effects-on-the-elderly-in-rural-china
#19
Jin Liu, Bingdong Hou, Xiao-Wei Ma, Hua Liao
Indoor air pollution is mainly caused by solid fuel use for cooking in developing countries. Many previous studies focused on its health risks on the children and in specific local area. This paper investigates household energy usage and transition for cooking in rural China and the health effects on the elderly. A national large-scale dataset CHARLS (China Health and Retirement Longitudinal Study) covering 450 villages and communities is employed. Logit regressions were used to quantitatively estimate the effects, after controlling for some factors such as income, demographic, and geographical variables...
November 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29164299/comparison-of-18-f-fdg-pet-mri-and-mri-alone-for-whole-body-staging-and-potential-impact-on-therapeutic-management-of-women-with-suspected-recurrent-pelvic-cancer-a-follow-up-study
#20
Lino M Sawicki, Julian Kirchner, Johannes Grueneisen, Verena Ruhlmann, Bahriye Aktas, Benedikt M Schaarschmidt, Michael Forsting, Ken Herrmann, Gerald Antoch, Lale Umutlu
PURPOSE: To evaluate the diagnostic performance of (18)F-FDG PET/MRI for whole-body staging and potential changes in therapeutic management of women with suspected recurrent pelvic cancer in comparison with MRI alone. METHODS: Seventy-one consecutive women (54 ± 13 years, range: 25-80 years) with suspected recurrence of cervical (32), ovarian (26), endometrial (7), vulvar (4), and vaginal (2) cancer underwent PET/MRI including a diagnostic contrast-enhanced MRI protocol...
November 21, 2017: European Journal of Nuclear Medicine and Molecular Imaging
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