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https://www.readbyqxmd.com/read/29783093/a-direct-plasma-mirna-assay-for-early-detection-and-histological-classification-of-lung-cancer
#1
Qixin Leng, Yue Wang, Feng Jiang
Cell-free microRNAs in plasma provide circulating biomarkers for lung cancer. Most techniques for analysis of miRNAs require a large plasma volume to purify a sufficient RNA yield followed by complicated downstream processing. Small differences in the multiple procedures often cause large analytical variations and poor diagnostic values of the plasma biomarkers. Here we investigate whether directly quantifying plasma miRNAs without RNA purification could diagnose lung cancer. FirePlex assay was directly applied to 20 μl plasma of 56 lung cancer patients and 28 cancer free controls for quantifying 11 lung tumor-associated miRNAs...
May 17, 2018: Translational Oncology
https://www.readbyqxmd.com/read/29782819/analytical-performance-of-an-immunoassay-to-measure-proenkephalin
#2
Leslie J Donato, Jeffrey W Meeusen, John C Lieske, Deborah Bergmann, Andrea Sparwaßer, Allan S Jaffe
BACKGROUND: Endogenous opioids, enkephalins, are known to increase with acute kidney injury. Since the mature pentapeptides are unstable, we evaluated the performance of an assay that measures proenkephalin 119-159 (PENK), a stable peptide formed concomitantly with mature enkephalins. METHODS: PENK assay performance was evaluated on two microtiterplate/chemiluminescence sandwich immunoassay formats that required 18 or 1 h incubation times. PENK concentration was measured in plasma from healthy individuals to establish a reference interval and in patients with varied levels of kidney function and comorbidities to assess the association with measured glomerular filtration rate (mGFR) using iothalamate clearance...
May 18, 2018: Clinical Biochemistry
https://www.readbyqxmd.com/read/29782812/what-variables-are-associated-with-the-outcome-of-arthroscopic-lysis-and-lavage-surgery-for-internal-derangement-of-the-temporomandibular-joint
#3
Tyler H Haeffs, Lindsay N D'Amato, Shehryar N Khawaja, David A Keith, Steven J Scrivani
PURPOSE: Arthroscopic lysis and lavage surgery (AS) is an effective modality that can decrease pain and increase maximum interincisal opening (MIO) in patients with internal derangement (ID) of the temporomandibular joint (TMJ). However, some patients remain in pain or have limited mandibular range of motion despite AS. The purpose of this study was to determine the effectiveness, prevalence of adverse effects, and predictors of response to TMJ AS in patients with TMJ arthralgia and ID...
April 26, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29780034/improving-predictive-asthma-algorithms-with-modelled-environment-data-for-scotland-an-observational-cohort-study-protocol
#4
Ireneous N Soyiri, Aziz Sheikh, Stefan Reis, Kimberly Kavanagh, Massimo Vieno, Tom Clemens, Edward J Carnell, Jiafeng Pan, Abby King, Rachel C Beck, Hester J T Ward, Chris Dibben, Chris Robertson, Colin R Simpson
INTRODUCTION: Asthma has a considerable, but potentially, avoidable burden on many populations globally. Scotland has some of the poorest health outcomes from asthma. Although ambient pollution, weather changes and sociodemographic factors have been associated with asthma attacks, it remains unclear whether modelled environment data and geospatial information can improve population-based asthma predictive algorithms. We aim to create the afferent loop of a national learning health system for asthma in Scotland...
May 20, 2018: BMJ Open
https://www.readbyqxmd.com/read/29778564/simultaneous-quantification-of-systemic-azoles-and-their-major-metabolites-in-human-serum-by-hplc-pda-role-of-azole-metabolic-rate
#5
Alicia Gomez-Lopez, Laura Alcazar-Fuoli, Leticia Bernal-Martínez
We describe the development and validation of a novel liquid chromatography assay (HPLC/PDA) for simultaneous quantification of voriconazole, itraconazole, and posaconazole, as well as some of their major metabolites, voriconazole N-oxide and hydroxy-itraconazole, in human serum. Analytes were detected using a PDA system that allows the characterization of the specific UV spectra of each compound. The assay exhibited linearity between 0.25-16 mg/L for all the compounds tested. The accuracy and within- and between-day precision of the assay were in acceptable ranges...
April 14, 2018: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29778416/the-use-of-the-shock-index-as-a-predictor-of-active-bleeding-in-trauma-patients
#6
Andrea Campos-Serra, Sandra Montmany-Vioque, Pere Rebasa-Cladera, Heura Llaquet-Bayo, Raquel Gràcia-Roman, Anna Colom-Gordillo, Salvador Navarro-Soto
INTRODUCTION: Vital signs indicate the presence of bleeding only after large amounts of blood have been lost, with high morbidity and mortality. The Shock Index (SI) is a hemorrhage indicator with a cut-off point for the risk of bleeding at 0.9. The aim of this study is to assess whether a cut-off of≥0.8 is more sensitive for detecting occult bleeding, providing for early initiation of therapeutic maneuvers. METHODS: SI analytical validation study of severe trauma patients older than 16 years of age...
May 16, 2018: Cirugía Española
https://www.readbyqxmd.com/read/29777966/determinants-of-choice-of-delivery-place-testing-rational-choice-theory-and-habitus-theory
#7
Anja Broda, Juliane Krüger, Stephanie Schinke, Andreas Weber
OBJECTIVE: The current study uses two antipodal social science theories, the rational choice theory and the habitus theory, and applies these to describe how women choose between intraclinical (i.e., hospital-run birth clinics) and extraclinical (i.e., midwife-led birth centres or home births) delivery places. DESIGN, SETTING, PARTICIPANTS, MEASUREMENTS: Data were collected in a cross-sectional questionnaire-based survey among 189 women. A list of 22 determinants, conceptualized to capture the two theoretical concepts, were rated on a 7-point Likert scale with 1 = unimportant to 7 = very important...
May 7, 2018: Midwifery
https://www.readbyqxmd.com/read/29777781/screen-related-parenting-practices-in-low-income-mexican-american-families
#8
Darcy A Thompson, Sarah J Schmiege, Susan L Johnson, Elizabeth A Vandewater, Richard E Boles, Ruth E Zambrana, Jerusha Lev, Jeanne M Tschann
OBJECTIVES: To (1) examine whether the Information, Motivation, and Behavioral Skills Model predicts maternal screen-related parenting practices and (2) evaluate the relationship of American Academy of Pediatrics(AAP)-recommended parenting practices with child television (TV) use behaviors. METHODS: In this cross-sectional study, 312 Spanish- and/or English-speaking female primary caregivers of Mexican descent with a child 3-5 years of age were recruited from safety-net pediatric clinics...
May 16, 2018: Academic Pediatrics
https://www.readbyqxmd.com/read/29777607/optimizing-charge-state-distribution-is-a-prerequisite-for-accurate-protein-biomarker-quantification-with-lc-ms-ms-as-illustrated-by-hepcidin-measurement
#9
Ellen M H Schmitz, Niels M Leijten, Joost L J van Dongen, Maarten A C Broeren, Lech G Milroy, Luc Brunsveld, Volkher Scharnhorst, Daan van de Kerkhof
BACKGROUND: Targeted quantification of protein biomarkers with liquid chromatography-tandem mass spectrometry (LC-MS/MS) has great potential, but is still in its infancy. Therefore, we elucidated the influence of charge state distribution and matrix effects on accurate quantification, illustrated by the peptide hormone hepcidin. METHODS: An LC-MS/MS assay for hepcidin, developed based on existing literature, was improved by using 5 mM ammonium formate buffer as mobile phase A and as an elution solution for solid phase extraction (SPE) to optimize the charge state distribution...
May 19, 2018: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29777596/morphological-analysis-of-pore-size-and-connectivity-in-a-thick-mixed-culture-biofilm
#10
Alex F Rosenthal, James S Griffin, Michael Wagner, Aaron I Packman, Oluwaseyi Balogun, George F Wells
Morphological parameters are commonly used to predict transport and metabolic kinetics in biofilms. Yet, quantification of biofilm morphology remains challenging due to imaging technology limitations and lack of robust analytical approaches. We present a novel set of imaging and image analysis techniques to estimate internal porosity, pore size distributions, and pore network connectivity to a depth of 1 mm at a resolution of 10 µm in a biofilm exhibiting both heterotrophic and nitrifying activity. Optical coherence tomography (OCT) scans revealed an extensive pore network with diameters as large as 110 µm directly connected to the biofilm surface and surrounding fluid...
May 19, 2018: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29777147/prediction-of-moisture-content-for-congou-black-tea-withering-leaves-using-image-features-and-nonlinear-method
#11
Gaozhen Liang, Chunwang Dong, Bin Hu, Hongkai Zhu, Haibo Yuan, Yongwen Jiang, Guoshuang Hao
Withering is the first step in the processing of congou black tea. With respect to the deficiency of traditional water content detection methods, a machine vision based NDT (Non Destructive Testing) method was established to detect the moisture content of withered leaves. First, according to the time sequences using computer visual system collected visible light images of tea leaf surfaces, and color and texture characteristics are extracted through the spatial changes of colors. Then quantitative prediction models for moisture content detection of withered tea leaves was established through linear PLS (Partial Least Squares) and non-linear SVM (Support Vector Machine)...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29776539/near-infrared-emission-spectroscopy-for-rapid-compositional-analysis-of-portland-cements
#12
Jicarla Portela Rebouças, Jarbas José Rodrigues Rohwedder, Celio Pasquini
Near infrared emission spectroscopy (NIRES) has been investigated to yield a new analytical method for determination of CaO, SiO2 , Al2 O3 , Fe2 O3 , MgO, and SO3 in Portland cement samples. The analyses were accomplished by correlation of the second derivative NIRES spectra with reference elemental analyses made by X-ray Fluorescence (XRF), using Partial Least Square (PLS) regression models. Four different types of cements (type II, III, IV and V) were included in the models. The results show RMSEP from 0...
September 18, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29776164/active-brownian-particles-near-straight-or-curved-walls-pressure-and-boundary-layers
#13
Ayhan Duzgun, Jonathan V Selinger
Unlike equilibrium systems, active matter is not governed by the conventional laws of thermodynamics. Through a series of analytic calculations and Langevin dynamics simulations, we explore how systems cross over from equilibrium to active behavior as the activity is increased. In particular, we calculate the profiles of density and orientational order near straight or circular walls and show the characteristic width of the boundary layers. We find a simple relationship between the enhancements of density and pressure near a wall...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776125/post-transcriptional-bursting-in-genes-regulated-by-small-rna-molecules
#14
Guillermo Rodrigo
Gene expression programs in living cells are highly dynamic due to spatiotemporal molecular signaling and inherent biochemical stochasticity. Here we study a mechanism based on molecule-to-molecule variability at the RNA level for the generation of bursts of protein production, which can lead to heterogeneity in a cell population. We develop a mathematical framework to show numerically and analytically that genes regulated post transcriptionally by small RNA molecules can exhibit such bursts due to different states of translation activity (on or off), mostly revealed in a regime of few molecules...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776082/phase-field-based-lattice-boltzmann-modeling-of-large-density-ratio-two-phase-flows
#15
Hong Liang, Jiangrong Xu, Jiangxing Chen, Huili Wang, Zhenhua Chai, Baochang Shi
In this paper, we present a simple and accurate lattice Boltzmann (LB) model for immiscible two-phase flows, which is able to deal with large density contrasts. This model utilizes two LB equations, one of which is used to solve the conservative Allen-Cahn equation, and the other is adopted to solve the incompressible Navier-Stokes equations. A forcing distribution function is elaborately designed in the LB equation for the Navier-Stokes equations, which make it much simpler than the existing LB models. In addition, the proposed model can achieve superior numerical accuracy compared with previous Allen-Cahn type of LB models...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776074/nonequilibrium-forces-following-quenches-in-active-and-thermal-matter
#16
Christian M Rohwer, Alexandre Solon, Mehran Kardar, Matthias Krüger
Nonequilibrium systems with conserved quantities like density or momentum are known to exhibit long-ranged correlations. This, in turn, leads to long-ranged fluctuation-induced (Casimir) forces, predicted to arise in a variety of nonequilibrium settings. Here, we study such forces, which arise transiently between parallel plates or compact inclusions in a gas of particles, following a change ("quench") in temperature or activity of the medium. Analytical calculations, as well as numerical simulations of passive or active Brownian particles, indicate two distinct forces: (i) The immediate effect of the quench is adsorption or desorption of particles of the medium to the immersed objects, which in turn initiates a front of relaxing (mean) density...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776049/diffusive-instabilities-in-a-hyperbolic-activator-inhibitor-system-with-superdiffusion
#17
Alain Mvogo, Jorge E Macías-Díaz, Timoléon Crépin Kofané
We investigate analytically and numerically the conditions for wave instabilities in a hyperbolic activator-inhibitor system with species undergoing anomalous superdiffusion. In the present work, anomalous superdiffusion is modeled using the two-dimensional Weyl fractional operator, with derivative orders α∈ [1,2]. We perform a linear stability analysis and derive the conditions for diffusion-driven wave instabilities. Emphasis is placed on the effect of the superdiffusion exponent α, the diffusion ratio d, and the inertial time τ...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29775704/alkaline-active-cyanide-dihydratase-of-flavobacterium-indicum-mtcc-6936-growth-optimization-purification-characterization-and-in-silico-analysis
#18
Virender Kumar, Vijay Kumar, Tek Chand Bhalla
The present work explores a rare cyanide dihydratase of Flavobacterium indicum MTCC 6936 for its potential of cyanide degradation. The enzyme is purified to 12 fold with a yield of 76%. SDS and native-PAGE analysis revealed that enzyme was monomer of 40 kDa size. The enzyme works well in mesophilic range at wide array of pH. The thermostability profile of cyanide dihydratase revealed that the enzyme is quite stable at 30 °C and 35 °C with half-life of 6 h 30 min and 5 h respectively. Km and Vmax for cyanide dihydratase of F...
May 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29774391/comparison-of-left-ventricular-hypertrophy-by-electrocardiography-and-echocardiography-in-children-using-analytics-tool
#19
Lauren Tague, Justin Wiggs, Qianxi Li, Robert McCarter, Elizabeth Sherwin, Jacqueline Weinberg, Craig Sable
Left ventricular hypertrophy (LVH) is a common finding on pediatric electrocardiography (ECG) leading to many referrals for echocardiography (echo). This study utilizes a novel analytics tool that combines ECG and echo databases to evaluate ECG as a screening tool for LVH. SQL Server 2012 data warehouse incorporated ECG and echo databases for all patients from a single institution from 2006 to 2016. Customized queries identified patients 0-18 years old with LVH on ECG and an echo performed within 24 h. Using data visualization (Tableau) and analytic (Stata 14) software, ECG and echo findings were compared...
May 17, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29773662/validation-of-the-16-gene-recurrence-score-in-patients-with-locoregional-high-risk-renal-cell-carcinoma-from-a-phase-3-trial-of-adjuvant-sunitinib
#20
Brian I Rini, Bernard Escudier, Jean-Francois Martini, Ahmed Magheli, Christer Svedman, Margarita Lopatin, Dejan Knezevic, Audrey D Goddard, Phillip G Febbo, Rachel Li, Xun Lin, Olga Valota, Michael Staehler, Robert J Motzer, Alain Ravaud
PURPOSE: Adjuvant sunitinib prolonged disease-free survival (DFS) (hazard ratio [HR] 0.76) in patients with locoregional high-risk renal cell carcinoma (RCC) in the S-TRAC trial (ClinicalTrials.gov NCT00375674). The 16-gene Recurrence Score (RS) assay was previously developed and validated to estimate risk for disease recurrence in patients with RCC post-nephrectomy. This analysis further validated the prognostic value of RS assay in patients from S-TRAC and explored association of RS results with prediction of sunitinib benefit...
May 17, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
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