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https://www.readbyqxmd.com/read/28927241/physical-activity-maintenance-and-metabolic-risk-in-adolescents
#1
Danilo R Silva, André O Werneck, Paul J Collings, Rômulo A Fernandes, Décio S Barbosa, Enio R V Ronque, Luís B Sardinha, Edilson S Cyrino
Aim: Examine the association between child and adolescent physical activity maintenance categories and metabolic profile in adolescence. Methods: This cross-sectional study was conducted with 1152 adolescents (57.4% female) aged 10-16 years from Londrina, Brazil. Physical activity was self-reported in childhood (7-10 years old, retrospective data) and adolescence through questionnaires. Cardiorespiratory fitness (20 m shuttle-run test), body fat (skinfolds), waist circumference, blood pressure (automatic instrument) and blood variables (fasting glucose, HDL-cholesterol and triglycerides) were measured at adolescence...
August 30, 2017: Journal of Public Health
https://www.readbyqxmd.com/read/28927003/expanding-the-applicability-of-poly-ionic-liquids-in-solid-phase-microextraction-pyrrolidinium-coatings
#2
David J S Patinha, Liliana C Tomé, Mehmet Isik, David Mecerreyes, Armando J D Silvestre, Isabel M Marrucho
Crosslinked pyrrolidinium-based poly(ionic liquids) (Pyrr-PILs) were synthesized through a fast, simple, and solventless photopolymerization scheme, and tested as solid phase microextraction (SPME) sorbents. A series of Pyrr-PILs bearing three different alkyl side chain lengths with two, eight, and fourteen carbons was prepared, characterized, and homogeneously coated on a steel wire by using a very simple procedure. The resulting coatings showed a high thermal stability, with decomposition temperatures above 350 °C, excellent film stability, and lifetime of over 100 injections...
September 18, 2017: Materials
https://www.readbyqxmd.com/read/28926942/the-semi-synthetic-peptide-lin-sb056-1-in-combination-with-edta-exerts-strong-antimicrobial-and-antibiofilm-activity-against-pseudomonas-aeruginosa-in-conditions-mimicking-cystic-fibrosis-sputum
#3
Giuseppantonio Maisetta, Lucia Grassi, Semih Esin, Ilaria Serra, Mariano A Scorciapino, Andrea C Rinaldi, Giovanna Batoni
Pseudomonas aeruginosa is a major cause of chronic lung infections in cystic fibrosis (CF) patients. The ability of the bacterium to form biofilms and the presence of a thick and stagnant mucus in the airways of CF patients largely contribute to antibiotic therapy failure and demand for new antimicrobial agents able to act in the CF environment. The present study investigated the anti-P. aeruginosa activity of lin-SB056-1, a recently described semi-synthetic antimicrobial peptide, used alone and in combination with the cation chelator ethylenediaminetetraacetic acid (EDTA)...
September 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28926842/pharmacotherapy-with-thymoquinone-improved-pancreatic-%C3%AE-cell-integrity-and-functional-activity-enhanced-islets-revascularization-and-alleviated-metabolic-and-hepato-renal-disturbances-in-streptozotocin-induced-diabetes-in-rats
#4
Adel Galal El-Shemi, Osama Adnan Kensara, Aiman Alsaegh, Mohammed Hasan Mukhtar
AIMS: This study is aimed at evaluating the antidiabetic effects of thymoquinone (TQ) on streptozotocin (STZ)-induced diabetes in rats, and exploring the possible underlying mechanisms. METHODS: Diabetes was induced in adult male Wistar rats by intraperitoneal injection of freshly prepared STZ (65 mg/kg). After disease induction, 42 rats were equally assigned to: controls, STZ-diabetic group, and STZ-diabetic group treated with oral TQ (35 mg/kg/day) for 5 weeks...
September 20, 2017: Pharmacology
https://www.readbyqxmd.com/read/28926735/ketamine-metabolites-with-antidepressant-effects-fast-economical-and-eco-friendly-enantioselective-separation-based-on-supercritical-fluid-chromatography-sfc-and-single-quadrupole-ms-detection
#5
Georg M Fassauer, Robert Hofstetter, Mahmoud Hasan, Stefan Oswald, Christina Modeß, Werner Siegmund, Andreas Link
Increasing evidence accumulates that metabolites of the dissociative anesthetic ketamine contribute considerably to the biological effects of this drug and could be developed as next generation antidepressants, especially for acute treatment of patients with therapy-refractory major depression. Analytical methods for the simultaneous determination of the plethora of hydroxylated, dehydrogenated and/or demethylated compounds formed after administration of ketamine hydrochloride are a prerequisite for future clinical investigations and a deeper understanding of the individual role of the isomers of these metabolites...
September 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28926702/the-dynamic-feature-of-incipient-polymer-collapse-below-the-theta-point
#6
Yicen Liu, Yibing Dai, Xiaofei Xu
We study the dynamics of polymer chain with gradually changing the solvent quality from good to poor by dissipative particle dynamics simulation. We nd several spectral modes related to internal motions of intrachain interaction. As approaching the coil-to-globule transition point, all fast modes of spectrum ω > 1 (ns)-1 disappear. There is only a slow mode at ω≈0.66 (ns)-1. Moreover, the spectral density at this slow mode reaches a maximum value at the transition point. We suggest that, at the transition point, the chain conformation relaxes to the most probable distribution only by the slow mode...
September 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28926628/application-of-raman-spectroscopy-in-type-2-diabetes-screening-in-blood-using-leucine-and-isoleucine-amino-acids-as-biomarkers-and-in-comparative-anti-diabetic-drugs-efficacy-studies
#7
Zephania Birech, Peter Waweru Mwangi, Fredrick Bukachi, Keith Makori Mandela
Diabetes is an irreversible condition characterized by elevated blood glucose levels. Currently, there are no predictive biomarkers for this disease and the existing ones such as hemoglobin A1c and fasting blood glucose are used only when diabetes symptoms are noticed. The objective of this work was first to explore the potential of leucine and isoleucine amino acids as diabetes type 2 biomarkers using their Raman spectroscopic signatures. Secondly, we wanted to explore whether Raman spectroscopy can be applied in comparative efficacy studies between commercially available anti-diabetic drug pioglitazone and the locally used anti-diabetic herbal extract Momordica spinosa (Gilg...
2017: PloS One
https://www.readbyqxmd.com/read/28926585/degree-sums-and-dense-spanning-trees
#8
Tao Li, Yingqi Gao, Qiankun Dong, Hua Wang
Finding dense spanning trees (DST) in unweighted graphs is a variation of the well studied minimum spanning tree problem (MST). We utilize established mathematical properties of extremal structures with the minimum sum of distances between vertices to formulate some general conditions on the sum of vertex degrees. We analyze the performance of various combinations of these degree sum conditions in finding dense spanning subtrees and apply our approach to practical examples. After briefly describing our algorithm we also show how it can be used on variations of DST, motivated by variations of MST...
2017: PloS One
https://www.readbyqxmd.com/read/28926265/tobacco-mosaic-virus-delivered-cisplatin-restores-efficacy-in-platinum-resistant-ovarian-cancer-cells
#9
Christina E Franke, Anna E Czapar, Ravi B Patel, Nicole F Steinmetz
Platinum resistance in ovarian cancer is the major determinant of disease prognosis. Resistance can first appear at the onset of disease or develop in response to platinum-based chemotherapy. Due to poor response to alternate chemotherapies and lack of targeted therapies, there is an urgent clinical need for a new avenue toward treatment of platinum-resistant (PR) ovarian cancer. Nanoscale delivery systems hold potential to overcome resistance mechanisms. In this work, we present tobacco mosaic virus (TMV) as a nanocarrier for cisplatin for treatment of PR ovarian cancer cells...
September 19, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28926253/understanding-the-role-of-dna-topology-in-target-search-dynamics-of-proteins
#10
Anupam Mondal, Arnab Bhattacherjee
A wide range of cellular processes initiates upon recognising and binding of proteins to specific DNA sites. Typically, the recognition process is incredibly fast owing to a complex mechanism that combines different 3D and 1D modes of translocation of the protein. While few studies performed on selected DNA topologies suggested that the DNA topology might alter the balance between these two modes and therefore the target search kinetics, its detail role in target search mechanism remains unclear. Here, we present a discrete-state stochastic approach that allows us to incorporate the topological information of DNA molecule explicitly and predict its role during the process when proteins search for their specific binding sites on DNA...
September 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28926232/prediction-errors-of-molecular-machine-learning-models-lower-than-hybrid-dft-error
#11
Felix A Faber, Luke Hutchison, Bing Huang, Justin Gilmer, Samuel S Schoenholz, George E Dahl, Oriol Vinyals, Steven Kearnes, Patrick F Riley, O Anatole von Lilienfeld
We investigate the impact of choosing regres- sors and molecular representations for the construction of fast machine learning (ML) models of thirteen electronic ground-state properties of organic molecules. The performance of each regressor/representation/property combination is assessed using learning curves which report out- of-sample errors as a function of training set size with up to ∼118k distinct molecules. Molecular structures and properties at hybrid density functional theory (DFT) level of theory come from the QM9 database [Ramakrishnan et al, Scientific Data 1 140022 (2014)] and include enthalpies and free energies of atomization , HOMO/LUMO energies and gap, dipole moment, polarizability, zero point vibrational energy, heat capacity and the highest fundamental vibrational frequency...
September 19, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28926170/efficacy-and-safety-of-saxagliptin-in-combination-with-metformin-as-initial-therapy-in-chinese-patients-with-type-2-diabetes-results-from-the-start-study-a-multicenter-randomized-double-blind-active-controlled-phase-3-trial
#12
Jingtao Dou, Jianhua Ma, Jun Liu, Changjiang Wang, Eva Johnsson, Hui Yao, June Zhao, Changyu Pan
OBJECTIVE: To assess the efficacy and safety of saxagliptin plus metformin over 24 weeks in pharmacotherapy-naïve Chinese patients with type 2 diabetes mellitus and inadequate glycemic control (HbA1c 8.0-12.0%). RESEARCH DESIGN AND METHODS: In this multicenter, double-blind, active-controlled study (The START study: NCT02273050), patients were randomized (1:1:1) to saxagliptin 5 mg plus metformin, saxagliptin 5 mg plus placebo, or metformin plus placebo. Saxagliptin was taken once daily; metformin was taken once/twice daily and was titrated from 500 mg to a maximum of 2000 mg/day over 8 weeks...
September 19, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28926153/comparative-and-population-genomics-landscape-of-phellinus-noxius-a-hypervariable-fungus-causing-root-rot-in-trees
#13
Chia-Lin Chung, Tracy J Lee, Mitsuteru Akiba, Hsin-Han Lee, Tzu-Hao Kuo, Dang Liu, Huei-Mien Ke, Toshiro Yokoi, Marylette B Roa, Meiyeh J Lu, Ya-Yun Chang, Pao-Jen Ann, Jyh-Nong Tsai, Chien-Yu Chen, Shean-Shong Tzean, Yuko Ota, Tsutomu Hattori, Norio Sahashi, Ruey-Fen Liou, Taisei Kikuchi, Isheng J Tsai
The order Hymenochaetales of white rot fungi contain some of the most aggressive wood decayers causing tree deaths around the world. Despite their ecological importance and the impact of diseases they cause, little is known about the evolution and transmission patterns of these pathogens. Here, we sequenced and undertook comparative genomics analyses of Hymenochaetales genomes using brown root rot fungus Phellinus noxius, wood-decomposing fungus Phellinus lamaensis, laminated root rot fungus Phellinus sulphurascens, and trunk pathogen Porodaedalea pini...
September 19, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28926043/new-complete-assignment-of-x-ray-powder-diffraction-patterns-in-graphitic-carbon-nitride-using-discrete-fourier-transform-and-direct-experimental-evidence
#14
Bo-Wen Sun, Hong-Yu Yu, Yong-Jing Yang, Hui-Jun Li, Cheng-Yu Zhai, Dong-Jin Qian, Meng Chen
To date, there have been only a few studies focusing on the assignment of X-ray diffraction (XRD) patterns in graphitic carbon nitrides (g-C3N4) and contradictory determination for a broad peak around 12°-14° has been perplexing. In this study, assignments are carried out both theoretically and experimentally. The cell parameters for g-C3N4 are determined as a = b = 8.1 Å, c = 6.5 Å, α = β = 90°, and γ = 120°. Qualitative and semi-quantitative methods such as fast Fourier transform and residual after 1st and 2nd derivatives are used to confirm and search the hidden peaks...
September 19, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28926001/ketamine-differential-neurophysiological-dynamics-in-functional-networks-in-the-rat-brain
#15
A Ahnaou, H Huysmans, R Biermans, N V Manyakov, W H I M Drinkenburg
Recently, the N-methyl-d-aspartate-receptor (NMDAR) antagonist ketamine has emerged as a fast-onset mechanism to achieve antidepressant activity, whereas its psychomimetic, dissociative and amnestic effects have been well documented to pharmacologically model schizophrenia features in rodents. Sleep-wake architecture, neuronal oscillations and network connectivity are key mechanisms supporting brain plasticity and cognition, which are disrupted in mood disorders such as depression and schizophrenia. In rats, we investigated the dynamic effects of acute and chronic subcutaneous administration of ketamine (2...
September 19, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28925986/association-between-emotional-symptoms-and-job-demands-in-an-asian-electronics-factory
#16
Wei-Lieh Huang, Yue Leon Guo, Pau-Chung Chen, Jui Wang, Po-Ching Chu
Various work-related issues including mental health have been described for the electronic industry. Although East Asian countries play important roles in the electronics industry, the association between job demands and emotional symptoms has been rarely examined. The present study recruited 603 workers from either office or clean room environments in an electronics factory in Taiwan. Their personal factors, work-related factors, and emotional symptoms were assessed by a self-administered questionnaire. The symptoms of depression and hostility were reported in 24...
September 19, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28925940/zebrafish-as-a-model-for-the-study-of-microvascular-complications-of-diabetes-and-their-mechanisms
#17
REVIEW
Karl Heckler, Jens Kroll
Diabetes mellitus (DM) is a crucial metabolic disease that leads to severe disorders. These include macrovascular complications such as myocardial infarction, stroke, and peripheral artery disease and microvascular complications including diabetic nephropathy, neuropathy, and retinopathy. Diabetes mellitus, along with its associated organ pathologies, is one of the key problems in today's medicine. Zebrafish is an upcoming disease model organism in diabetes research. Its glucose metabolism and the pathways of reactive metabolite formation are very similar to those of humans...
September 19, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28925919/computational-design-of-environmental-sensors-for-the-potent-opioid-fentanyl
#18
Matthew J Bick, Per J Greisen, Kevin J Morey, Mauricio S Antunes, David La, Banumathi Sankaran, Luc Reymond, Kai Johnsson, June I Medford, David Baker
We describe the computational design of proteins that bind the potent analgesic fentanyl. Our approach employs a fast docking algorithm to find shape complementary ligand placement in protein scaffolds, followed by design of the surrounding residues to optimize binding affinity. Co-crystal structures of the highest affinity binder reveal a highly preorganized binding site, and an overall architecture and ligand placement in close agreement with the design model. We use the designs to generate plant sensors for fentanyl by coupling ligand binding to design stability...
September 19, 2017: ELife
https://www.readbyqxmd.com/read/28925890/the-use-of-hemodynamic-and-cerebral-monitoring-to-study-pharmacodynamics-in-neonates
#19
A Smits, L Thewissen, A Dereymaeker, E Dempsey, A Caicedo, Gunnar Naulaers
BACKGROUND: Drugs acting on the cardiovascular and central nervous system often display relatively fast clinical responses, which may differ in neonates compared to children and adults. Introduction of bedside monitoring tools might be of additional value in the pharmacodynamic (PD) assessment of such drugs in neonates. METHODS: We aim to provide an overview of the frequently used monitoring tools to assess drug effects on the hemodynamic status as well as the cerebral circulation, oxygenation and cerebral metabolism in neonates...
September 18, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28925812/watch-where-you-re-going-interferer-velocity-and-visual-behavior-predicts-avoidance-strategy-during-pedestrian-encounters
#20
James L Croft, Derek Panchuk
Pedestrians can avoid collisions with other pedestrians by modifying some combination of their velocity and their path. The authors investigated how path constraints (constrained or unconstrained), interferer velocity (slow or fast), and vision (looking or not looking; time spent looking at the interferer) influenced collision avoidance to an oblivious interferer walking on a perpendicular path. Ten participants walked 6 m to either a point or line target on either a constrained or unconstrained path while wearing an eye-tracking device and avoiding an oblivious interferer that walked at 2 speeds...
September 19, 2017: Journal of Motor Behavior
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