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https://www.readbyqxmd.com/read/29453461/roux-en-y-gastric-bypass-and-sleeve-gastrectomy-induces-specific-shifts-of-the-gut-microbiota-without-altering-the-metabolism-of-bile-acids-in-the-intestinal-lumen
#1
Henri Duboc, Caroline Chong Nguyen, Jean-Baptiste Cavin, Lara Ribeiro-Parenti, Anne-Charlotte Jarry, Dominique Rainteau, Lydie Humbert, Benoit Coffin, Maude Le Gall, André Bado, Harry Sokol
Some shifts in the gut microbiota composition and its metabolic fingerprints have been associated to Sleeve gastrectomy (SG) and Roux-en-Y Gastric Bypass (RYGB). So far, plasma bile acids have been associated with post-operative glucose improvement and weight loss, but nothing is known about their metabolism in the gut lumen. As bile acids are physiologically transformed by the microbiota into various species, the aim of this work was to study how SG and RYGB-associated dysbiosis impact the bioconversion of bile acids in the intestinal lumen...
January 30, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29453359/rational-construction-of-uniform-coni-based-core-shell-microspheres-with-tunable-electromagnetic-wave-absorption-properties
#2
Na Chen, Jian-Tang Jiang, Cheng-Yan Xu, Shao-Jiu Yan, Liang Zhen
Core-shell particles with integration of ferromagnetic core and dielectric shell are attracting extensive attention for promising microwave absorption applications. In this work, CoNi microspheres with conical bulges were synthesized by a simple and scalable liquid-phase reduction method. Subsequent coating of dielectric materials was conducted to acquire core-shell structured CoNi@TiO 2 composite particles, in which the thickness of TiO 2 is about 40 nm. The coating of TiO 2 enables the absorption band of CoNi to effectively shift from K u to S band, and endows CoNi@TiO 2 microspheres with outstanding electromagnetic wave absorption performance along with a maximum reflection loss of 76...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29453273/evolution-of-a-holistic-systems-approach-to-planning-and-managing-road-safety-the-victorian-case-study-1970-2015
#3
Carlyn Muir, Ian R Johnston, Eric Howard
BACKGROUND: The Victorian Safe System approach to road safety slowly evolved from a combination of the Swedish Vision Zero philosophy and the Sustainable Safety model developed by the Dutch. The Safe System approach reframes the way in which road safety is viewed and managed. METHODS: This paper presents a case study of the institutional change required to underpin the transformation to a holistic approach to planning and managing road safety in Victoria, Australia...
February 16, 2018: Injury Prevention: Journal of the International Society for Child and Adolescent Injury Prevention
https://www.readbyqxmd.com/read/29451908/cas9-mediated-excision-of-proximal-dnasei-h3k4me3-signatures-confers-robust-silencing-of-microrna-and-long-non-coding-rna-genes
#4
Harshavardhan Janga, Marina Aznaourova, Fabian Boldt, Katrin Damm, Arnold Grünweller, Leon N Schulte
CRISPR/Cas9-based approaches have greatly facilitated targeted genomic deletions. Contrary to coding genes however, which can be functionally knocked out by frame-shift mutagenesis, non-coding RNA (ncRNA) gene knockouts have remained challenging. Here we present a universal ncRNA knockout approach guided by epigenetic hallmarks, which enables robust gene silencing even in provisionally annotated gene loci. We build on previous work reporting the presence of overlapping histone H3 lysine 4 tri-methylation (H3K4me3) and DNaseI hypersensitivity sites around the transcriptional start sites of most genes...
2018: PloS One
https://www.readbyqxmd.com/read/29451407/advancements-in-drug-development-for-diarrhea-predominant-irritable-bowel-syndrome
#5
Giovanni Dothel, Maria Raffaell Barbaro, Emanuel Raschi, Giovanni Barbara, Fabrizio De Ponti
Introduction Diarrhea-predominant irritable bowel syndrome (IBS-D) is a common disorder characterized by a complex pathophysiology hampering optimal targeted drug development. Recent advances in our understanding of key underlying mechanisms prompted novel therapeutics including novel pharmacological approaches. Areas covered This review summarizes the latest advancements in the pipeline of IBS-D drugs focusing on new pharmacological targets, efficacy and safety of medicinal products considering the recent harmonization of regulatory requirements by the FDA and the EMA...
February 16, 2018: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/29450901/semiempirical-configuration-interaction-calculations-for-ru-centered-dyes
#6
Lisa A Fredin, Thomas C Allison
Computational investigation of the photochemical properties of transition-metal-centered dyes typically involves optimization of the molecular structure followed by calculation of the UV/visible spectrum. At present, these steps are usually carried out using density functional theory (DFT) and time-dependent DFT calculations. Recently, we demonstrated that semiempirical methods with appropriate parameterization could yield geometries that were in very good agreement with DFT calculations, allowing large sets of molecules to be screened quickly and efficiently...
February 15, 2018: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/29450820/overlapping-and-distinct-cognitive-impairments-in-attention-deficit-hyperactivity-and-autism-spectrum-disorder-without-intellectual-disability
#7
Sarah L Karalunas, Elizabeth Hawkey, Hanna Gustafsson, Meghan Miller, Marybeth Langhorst, Michaela Cordova, Damien Fair, Joel T Nigg
Attention-deficit/hyperactivity disorder (ADHD) and autism spectrum disorder (ASD) are commonly comorbid, share genetic liability, and often exhibit overlapping cognitive impairments. Clarification of shared and distinct cognitive effects while considering comorbid symptoms across disorders has been lacking. In the current study, children ages 7-15 years assigned to three diagnostic groups:ADHD (n = 509), ASD (n = 97), and controls (n = 301) completed measures spanning the cognitive domains of attention/arousal, working memory, set-shifting, inhibition, and response variability...
February 15, 2018: Journal of Abnormal Child Psychology
https://www.readbyqxmd.com/read/29450814/improving-the-catalytic-activity-and-thermostability-of-mas1-lipase-by-alanine-substitution
#8
REVIEW
Ge Zhao, Jianrong Wang, Qingyun Tang, Dongming Lan, Yonghua Wang
MAS1 is a lipase isolated from Streptomyces sp. strain W007 with potential application in biotechnology. Structural analysis of MAS1 lipase showed that eight amino acids with bulkier side located in the substrate-binding pocket may be involved in affecting catalytic performance. Alanine substitutions of those residues were conducted to reduce steric clash of catalyzed pocket and probe their functional roles. The k cat /K m of mutants H108A, F153A, and V233A increased to 2.3-, 2.1-, and 1.4-fold, respectively...
February 15, 2018: Molecular Biotechnology
https://www.readbyqxmd.com/read/29450383/eyesight-quality-and-computer-vision-syndrome
#9
Camelia Margareta Bogdănici, Diana Elena Săndulache, Corina Andreea Nechita
The aim of the study was to analyze the effects that gadgets have on eyesight quality. A prospective observational study was conducted from January to July 2016, on 60 people who were divided into two groups: Group 1 - 30 middle school pupils with a mean age of 11.9 ± 1.86 and Group 2 - 30 patients evaluated in the Ophthalmology Clinic, "Sf. Spiridon" Hospital, Iași, with a mean age of 21.36 ± 7.16 years. The clinical parameters observed were the following: visual acuity (VA), objective refraction, binocular vision (BV), fusional amplitude (FA), Schirmer's test...
April 2017: Romanian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29449796/formalization-of-the-classification-pattern-survey-of-classification-modeling-in-information-systems-engineering
#10
Chris Partridge, Sergio de Cesare, Andrew Mitchell, James Odell
Formalization is becoming more common in all stages of the development of information systems, as a better understanding of its benefits emerges. Classification systems are ubiquitous, no more so than in domain modeling. The classification pattern that underlies these systems provides a good case study of the move toward formalization in part because it illustrates some of the barriers to formalization, including the formal complexity of the pattern and the ontological issues surrounding the "one and the many...
2018: Software and Systems Modeling
https://www.readbyqxmd.com/read/29449785/a-systematic-review-of-burnout-among-doctors-in-china-a-cultural-perspective
#11
REVIEW
Dana Lo, Florence Wu, Mark Chan, Rodney Chu, Donald Li
Background: Numerous studies around the world has already suggested that burnout among doctors is a global phenomenon. However, studies for burnout in doctors are relatively limited in Chinese communities when compared to the West. As risk factors, barriers to intervention and strategies combatting burnout in different parts of the world can vary a lot due to different social culture and healthcare system, study with a focus at doctors in China from a cultural perspective is a worthful endeavor...
2018: Asia Pacific Family Medicine
https://www.readbyqxmd.com/read/29448485/temperature-anisotropy-at-equilibrium-reveals-nonlocal-entropic-contributions-to-interfacial-properties
#12
Øivind Wilhelmsen, Thuat T Trinh, Anders Lervik
Density gradient theory for fluids has played a key role in the study of interfacial phenomena for a century. In this work, we revisit its fundamentals by examining the vapor-liquid interface of argon, represented by the cut and shifted Lennard-Jones fluid. The starting point has traditionally been a Helmholtz energy functional using mass densities as arguments. By using rather the internal energy as starting point and including the entropy density as an additional argument, following thereby the phenomenological approach from classical thermodynamics, the extended theory suggests that the configurational part of the temperature has different contributions from the parallel and perpendicular directions at the interface, even at equilibrium...
January 2018: Physical Review. E
https://www.readbyqxmd.com/read/29448076/single-multi-echo-gre-acquisition-with-short-and-long-echo-spacing-for-simultaneous-quantitative-mapping-of-fat-fraction-b0-inhomogeneity-and-susceptibility
#13
Junmin Liu, Spencer Christiansen, Maria Drangova
Multi-echo gradient echo (mGRE) sequences have been widely adapted in clinical and scientific practice for different purposes to their capability of performing Dixon MRI, generating multi-contrast images and extracting multi-parametric maps. This work aims to extend mGRE-based techniques for imaging whole head, where further technical developments are required due to the co-existence of fat and large B0 inhomogeneity in regions such as the skull base and neck. Specifically, bipolar mGRE data were acquired with a single sequence that contains both a short echo-spacing (ΔTE) echo train to capture water-fat and B0 phase shifts (for proton density fat-fraction (FF) and B0 mapping) and a longer ΔTE echo train (and long echo times) to capture subtle susceptibility variations and R2* information...
February 12, 2018: NeuroImage
https://www.readbyqxmd.com/read/29446639/two-dimensional-electronic-spectroscopy-discloses-dynamics-and-mechanisms-of-solvent-driven-inertial-relaxation-in-polar-bodipy-dyes
#14
Luca Bolzonello, Annalisa Polo, Andrea Volpato, Elena Meneghin, Massimiliano Cordaro, Mariachiara Trapani, Mariagrazia Fortino, Alfonso Pedone, Maria Angela Castriciano, Elisabetta Collini
In this work, we demonstrate the use of 2D electronic spectroscopy (2DES) to study the mechanism and the timescale of the femtosecond Stokes shift dynamics in molecules characterized by intra-molecular charge transfer, such as distyryl-functionalized BODIPY molecules. The obtained results demonstrate that 2DES allows clear and direct visualization of the phenomenon. The analysis of the 2D data in terms of 2D frequency-frequency decay associated maps provides indeed not only the timescale of the relaxation process but also the starting and the final point of the energy flow and the associated reorganization energy, identifiable looking at the coordinates of a negative signature below diagonal...
February 15, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29445895/on-reprogramming-of-tumor-cells-metabolism-detection-of-glycogen-in-the-cell-lines-of-hepatocellular-origin-with-various-degrees-of-dedifferentiation
#15
Natalya P Teryukova, Victoria V Malkova, Elena I Sakhenberg, Vadim A Ivanov, Natalia N Bezborodkina, Sergei A Snopov
The reprogramming of cancer cells includes shifts in glucose and glycogen metabolism. The aim of our work was to check the ability of forming glycogen grains in hepatocellular tumor cell lines of various dedifferentiation levels. We studied the monolayer culture established in vitro after explanting cells from rat ascites Zajdela hepatoma strain C (ZH-C) as a "parental" line and its five daughter clonal sublines: the holoclonal sublines 3H, 5F, 6H and the meroclonal ones 1E, 9C, which possess, respectively, the properties of cancer stem-like cells (CSLCs) and cancer progenitor-like cells (CPLCs)...
February 14, 2018: Cytotechnology
https://www.readbyqxmd.com/read/29445504/the-relationship-between-night-work-and-breast-cancer
#16
Hye-Eun Lee, Jongin Lee, Tae-Won Jang, In-Ah Kim, Jungsun Park, Jaechul Song
Background: Since the International Agency for Research on Cancer classified shift work that involves circadian disruption as "probably carcinogenic to humans," there has been growing concern on the relationship between night work and breast cancer. In Korea, about 10-15% of workers are engaged in night-shift work, and breast cancer is one of the most common cancers in women. The purpose of this study was to review epidemiologic evidence on the relationship between night work and breast cancer...
2018: Annals of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29445188/daily-circadian-misalignment-impairs-human-cognitive-performance-task-dependently
#17
Sarah L Chellappa, Christopher J Morris, Frank A J L Scheer
Shift work increases the risk for human errors, such that drowsiness due to shift work has contributed to major industrial disasters, including Space Shuttle Challenger, Chernobyl and Alaska Oil Spill disasters, with extraordinary socio-economical costs. Overnight operations pose a challenge because our circadian biology inhibits cognitive performance at night. Yet how the circadian system modulates cognition over multiple days under realistic shift work conditions remains to be established. Importantly, because task-specific cognitive brain regions show different 24-h circadian dynamics, we hypothesize that circadian misalignment impacts cognition task-dependently...
February 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29444322/physiological-reactions-to-long-term-fishing-in-the-barents-sea
#18
B Netterstrøm, Å M Hansen, D Isaacson, A M Simonsen, P Weihe
Background: Fishing in distant waters for months may induce physiological stress. Aims: To assess the physiological stress reactions in fishermen working for 2-3 months continuously in 6-h shifts on trawlers in the Barents Sea. Methods: The crew of five trawlers fishing in the Barents Sea from January to April 2004 were invited to participate. In the week before and 5-7 days after the trip, the following measures were collected: salivary cortisol four times a day, 24-h urinary cortisol, blood pressure, heart rate, serum cholesterol, serum high-density lipoprotein (HDL-cholesterol), HbA1c (glycosylated haemoglobin) and weight...
February 10, 2018: Occupational Medicine
https://www.readbyqxmd.com/read/29444274/shift-work-parental-cardiovascular-disease-and-myocardial-infarction-in-males
#19
J Hermansson, J Hallqvist, B Karlsson, A Knutsson, K Gillander Gådin
Background: Shift work has been associated with an increased risk of cardiovascular disease (CVD). However, there is a need for more studies to determine whether there is an interaction between shift work and other risk factors of CVD, thereby increasing the risk of CVD in shift workers. Aims: To discern whether shift work and parental mortality from myocardial infarction (MI) or sudden cardiac death (SCD) interact to increase the risk of MI in men. Methods: A case-control dataset was used to assess interaction between shift work and parental history of CVD, using death from MI or SCD, or death before age 65, on an additive scale...
February 10, 2018: Occupational Medicine
https://www.readbyqxmd.com/read/29443692/executive-function-and-childhood-stuttering-parent-ratings-and-evidence-from-a-behavioral-task
#20
Katerina Ntourou, Julie D Anderson, Stacy A Wagovich
PURPOSE: The purpose of this study was to examine the executive function (EF) abilities of preschool children who do (CWS) and do not stutter (CWNS) using a parent-report questionnaire and a behavioral task. METHOD: Participants were 75 CWS and 75 CWNS between the ages of 3;0 and 5;11 (years; months). Parents rated their children's EF abilities using the Behavioral Rating Inventory of Executive Function-Preschool Version (BRIEF-P; Gioia, Espy, & Isquith, 2003). Children's ability to integrate cognitive flexibility, inhibitory control, and working memory was measured using a behavioral task, the Head-Toes-Knees-Shoulders (HTKS; Cameron Ponitz, McClelland, Matthews, & Morrison, 2009)...
December 30, 2017: Journal of Fluency Disorders
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