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https://www.readbyqxmd.com/read/28922661/lysophosphatidic-acid-inhibits-insulin-signaling-in-primary-rat-hepatocytes-via-the-lpa3-receptor-subtype-and-is-increased-in-obesity
#1
Susann Fayyaz, Lukasz Japtok, Fabian Schumacher, Dominik Wigger, Tim Julius Schulz, Kathrin Haubold, Erich Gulbins, Heinz Völler, Burkhard Kleuser
BACKGROUND/AIMS: Obesity is a main risk factor for the development of hepatic insulin resistance and it is accompanied by adipocyte hypertrophy and an elevated expression of different adipokines such as autotaxin (ATX). ATX converts lysophosphatidylcholine to lysophosphatidic acid (LPA) and acts as the main producer of extracellular LPA. This bioactive lipid regulates a broad range of physiological and pathological responses by activation of LPA receptors (LPA1-6). METHODS: The activation of phosphatidylinositide 3-kinases (PI3K) signaling (Akt and GSK-3ß) was analyzed via western blotting in primary rat hepatocytes...
September 1, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28922063/individual-calibration-of-accelerometers-in-children-and-their-health-related-implications
#2
Lynne M Boddy, Conor Cunningham, Stuart J Fairclough, Marie H Murphy, Gavin Breslin, Lawrence Foweather, Rebecca M Dagger, Lee E F Graves, Nicola D Hopkins, Gareth Stratton
This study compared children's physical activity (PA) levels, the prevalence of children meeting current guidelines of ≥60 minutes of daily moderate to vigorous PA (MVPA), and PA-health associations using individually calibrated (IC) and empirical accelerometer cutpoints. Data from 75 (n = 32 boys) 10-12 year old children were included in this study. Clustered cardiometabolic (CM) risk, directly measured cardiorespiratory fitness (CRF), anthropometric and 7 day accelerometer data were included within analysis...
September 18, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28921747/pitfalls-in-accelerometer-based-measurement-of-physical-activity-the-presence-of-reactivity-in-an-adult-population
#3
Sophie Baumann, Stefan Groß, Lisa Voigt, Antje Ullrich, Franziska Weymar, Thea Schwaneberg, Marcus Dörr, Christian Meyer, Ulrich John, Sabina Ulbricht
OBJECTIVE: When a behavior is monitored, it is likely to change, even if no change may be intended. This phenomenon is known as measurement reactivity. We investigated systematic changes in accelerometer-based measures over the days of monitoring as an indicator of measurement reactivity in an adult population. METHODS: One hundred seventy-one participants from the general population (65% women; mean age = 55 years, range: 42-65 years) wore accelerometers for seven consecutive days to measure sedentary behavior and physical activity...
September 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28915225/physical-activity-not-sedentary-time-predicts-dual-energy-x-ray-absorptiometry-measured-adiposity-age-5-to-19-years
#4
Kathleen F Janz, Piroska Boros, Elena M Letuchy, Soyang Kwon, Trudy L Burns, Steven M Levy
PURPOSE: To examine the associations among physical activity (PA), sedentary time (SED), and TV viewing (TV) with fat mass (FAT) and visceral adipose tissue mass (VAT) from childhood through adolescence (5-19 yr). METHODS: Participants in the Iowa Bone Development Study (n = 230 males and 233 females) were examined at ages 5, 8, 11, 13, 15, 17, and 19 yr. Accelerometers measured moderate- or vigorous-intensity PA (MVPA; min·d), light-intensity PA (LPA; min·d), and SED (h·d)...
October 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28912655/chronic-eccentric-exercise-and-antioxidant-supplementation-effects-on-lipid-profile-and-insulin-sensitivity
#5
Christina Yfanti, Athanasios Tsiokanos, Ioannis G Fatouros, Anastasios A Theodorou, Chariklia K Deli, Yiannis Koutedakis, Athanasios Z Jamurtas
Eccentric exercise has been shown to exert beneficial effects in both lipid profile and insulin sensitivity. Antioxidant supplementation during chronic exercise is controversial as it may prevent the physiological training-induced adaptations. The aim of this study was to investigate: 1) the minimum duration of the eccentric exercise training required before changes on metabolic parameters are observed and 2) whether antioxidant supplementation during training would interfere with these adaptations. Sixteen young healthy men were randomized into the Vit group (1 g of vitamin C and 400 IU vitamin E daily) and the placebo (PL) group...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28911354/drug-resistance-patterns-among-extra-pulmonary-tuberculosis-cases-in-a-tertiary-care-centre-in-north-india
#6
S K Sharma, J Chaubey, B K Singh, R Sharma, A Mittal, A Sharma
BACKGROUND: xtra-pulmonary tuberculosis (EPTB) is a growing public health concern, and data on drug resistance are limited. MATERIAL AND METHODS: Specimens from 2468 clinically diagnosed EPTB patients received at the Intermediate Reference Laboratory (IRL) of a tertiary centre in India were subjected to Ziehl-Neelsen staining, Xpert® MTB/RIF testing, liquid culture and drug susceptibility testing (DST) using automated BACTEC MGIT™ 960™. Line-probe assay (LPA) was performed on all culture-positive isolates...
October 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28910191/lysophosphatidic-acid-is-a-biomarker-for-peritoneal-carcinomatosis-of-gastric-cancer-and-correlates-with-poor-prognosis
#7
Ruolan Zeng, Bin Li, Junhui Huang, Meizuo Zhong, Li Li, Chaojun Duan, Shan Zeng, Jin Huang, Wei Liu, Jingchen Lu, Youhong Tang, Lingming Zhou, Yiping Liu, Jianhuang Li, Zhengxi He, Quan Wang, Youyi Dai
BACKGROUND: Peritoneal carcinomatosis (PC) is an important cause of morbidity and mortality among patients with gastric cancer. Thus, it is important to identify an ideal biomarker for PC. METHODS: Plasma and ascites samples were collected from gastric cancer patients with PC and a control group. Lysophosphatidic acid (LPA) levels were tested and analyzed. RESULTS: The plasma LPA levels of gastric cancer patients with PC were significantly higher than those in gastric cancer patients after radical resection (p = 0...
September 14, 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28899746/performance-of-five-research-domain-automated-wm-lesion-segmentation-methods-in-a-multi-center-ms-study
#8
Alexandra de Sitter, Martijn D Steenwijk, Aurélie Ruet, Adriaan Versteeg, Yahou Liu, Ronald A van Schijndel, Petra J W Pouwels, Iris D Kilsdonk, Keith S Cover, Bob W van Dijk, Stefan Ropele, Maria A Rocca, Marios Yiannakas, Mike P Wattjes, Soheil Damangir, Giovanni B Frisoni, Jaume Sastre-Garriga, Alex Rovira, Christian Enzinger, Massimo Filippi, Jette Frederiksen, Olga Ciccarelli, Ludwig Kappos, Frederik Barkhof, Hugo Vrenken
BACKGROUND AND PURPOSE: In vivoidentification of white matter lesions plays a key-role in evaluation of patients with multiple sclerosis (MS). Automated lesion segmentation methods have been developed to substitute manual outlining, but evidence of their performance in multi-center investigations is lacking. In this work, five research-domain automated segmentation methods were evaluated using a multi-center MS dataset. METHODS: 70 MS patients (median EDSS of 2...
September 9, 2017: NeuroImage
https://www.readbyqxmd.com/read/28898295/relationships-between-sleep-duration-physical-activity-and-body-mass-index-in-young-new-zealanders-an-isotemporal-substitution-analysis
#9
Borja Del Pozo-Cruz, Nicholas Gant, Jesús Del Pozo-Cruz, Ralph Maddison
BACKGROUND: The evidence regarding the unique effect of sedentary behaviour on obesity among children is unclear. Moreover, the effect of substituting sedentary behaviour with physical activity of different intensities on the body composition of children has received limited empirical study. OBJECTIVE: To examine the mathematical effects on Body Mass Index (BMI) of substituting sedentary behaviours with physical activities of different intensities on children and youth aged 5-14 years old in New Zealand...
2017: PloS One
https://www.readbyqxmd.com/read/28882822/both-nherf3-and-nherf2-are-necessary-for-multiple-aspects-of-acute-regulation-of-nhe3-by-elevated-ca-2-cgmp-and-lysophosphatidic-acid
#10
Leela Rani Avula, Tiane Chen, Olga Kovbasnjuk, Mark Donowitz
The intestinal epithelial brush border Na(+)/H(+) exchanger NHE3 accounts for a large component of intestinal Na absorption. NHE3 is regulated during digestion by signaling complexes on its C-terminus that include the four multi-PDZ domain containing NHERF family proteins. Because the roles of each NHERF appear to vary based on the cell model or intestinal segment studied and because of our recent finding that a NHERF3-NHERF2 heterodimer appears important for NHE3 regulation in Caco-2 cells, we examined the role of NHERF3 and NHERF2 in homozygous C57BL/6 NHERF2 and NHERF3 KO mouse jejunum...
September 7, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28882285/stenting-of-the-right-ventricular-outflow-tract-promotes-better-pulmonary-arterial-growth-compared-with-modified-blalock-taussig-shunt-palliation-in-tetralogy-of-fallot-type-lesions
#11
Daniel Quandt, Bharat Ramchandani, John Stickley, Chetan Mehta, Vinay Bhole, David J Barron, Oliver Stumper
OBJECTIVES: This study sought to compare pulmonary arterial (PA) growth during palliation after right ventricular outflow tract (RVOT) stenting versus modified Blalock-Taussig shunt (mBTS) in patients coming forward for complete repair of tetralogy of Fallot-type lesions. BACKGROUND: RVOT stenting is a recent alternative to mBTS in the initial palliation of selected patients with Fallot-type lesions. METHODS: This was a retrospective, single-center study of nonrandomized, consecutive palliated Fallot patients over a 10-year period...
September 11, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28882152/impact-of-the-supporting-physical-activity-in-the-childcare-environment-space-intervention-on-preschoolers-physical-activity-levels-and-sedentary-time-a-single-blind-cluster-randomized-controlled-trial
#12
Patricia Tucker, Leigh M Vanderloo, Andrew M Johnson, Shauna M Burke, Jennifer D Irwin, Anca Gaston, Molly Driediger, Brian W Timmons
BACKGROUND: Physical activity levels among preschoolers in childcare are low and sedentary time high. The Supporting Physical Activity in the Childcare Environment (SPACE) intervention had three components: 1. portable play equipment; 2. staff training; and, 3. modified outdoor playtime (i.e., shorter, more frequent periods). This study aimed to examine the effectiveness of the SPACE intervention on preschoolers' physical activity levels and sedentary time during childcare hours (compared to standard care)...
September 7, 2017: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/28880875/scaling-up-the-xpert-mtb-rif-assay-for-the-detection-of-tuberculosis-and-rifampicin-resistance-in-india-an-economic-analysis
#13
Sunil Khaparde, Neeraj Raizada, Sreenivas Achuthan Nair, Claudia Denkinger, Kuldeep Singh Sachdeva, Chinnambedu Nainarappan Paramasivan, Virender Singh Salhotra, Anna Vassall, Anja Van't Hoog
BACKGROUND: India is considering the scale-up of the Xpert MTB/RIF assay for detection of tuberculosis (TB) and rifampicin resistance. We conducted an economic analysis to estimate the costs of different strategies of Xpert implementation in India. METHODS: Using a decision analytical model, we compared four diagnostic strategies for TB patients: (i) sputum smear microscopy (SSM) only; (ii) Xpert as a replacement for the rapid diagnostic test currently used for SSM-positive patients at risk of drug resistance (i...
2017: PloS One
https://www.readbyqxmd.com/read/28879071/an-examination-of-compensation-effects-in-accelerometer-measured-occupational-and-non-occupational-physical-activity
#14
Jennifer L Gay, David M Buchner, Jessalyn Smith, Chunla He
Self-report data suggests a large proportion of total physical activity (PA) occurs at work. However, adults with higher levels of occupational PA may compensate by engaging in less non-occupational PA. The study aims were to 1) estimate the intensity, volume, and duration of PA in American adults that occurs at work, and 2) determine if those more active at work are less active outside of work. A cross-sectional sample of full-time employed adults (N = 510) was recruited from Georgia city and county governments in 2013-2015...
December 2017: Preventive Medicine Reports
https://www.readbyqxmd.com/read/28878104/treatment-of-severe-native-left-pulmonary-artery-stenosis-with-coronary-stent-implantation-in-a-2-4-kg-neonate
#15
Matthew C Schwartz, T Curtis Alford, Matthew Saxonhouse, David Ohmstede, Joseph Paolillo
A 1-month-old, 2.4 kg infant, previously born at 32 weeks gestation, was found to have a murmur while in the neonatal intensive care unit. The patient had ongoing feeding intolerance and required supplemental oxygen via nasal cannula. Cardiac computed tomography showed discrete stenosis of the proximal left pulmonary artery (LPA) with a normal-sized distal LPA. We describe the treatment course with transcatheter coronary stent implantation.
September 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28877919/high-lipoprotein-a-and-low-risk-of-major-bleeding-in-brain-and-airways-in-the-general-population-a-mendelian-randomization-study
#16
Anne Langsted, Pia R Kamstrup, Børge G Nordestgaard
BACKGROUND: The physiological role of lipoprotein(a) is unclear; however, lipoprotein(a) may play a role in hemostasis and wound healing. We tested the hypothesis that high lipoprotein(a) concentrations are associated with low risk of major bleeding in the brain and airways both observationally and causally (from human genetics). METHODS: We examined 109169 individuals from the Copenhagen City Heart Study and the Copenhagen General Population study, 2 similar prospective studies conducted in the Danish general population...
September 6, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28874440/blocking-gp130-signaling-suppresses-autotaxin-expression-in-adipocytes-and-improves-insulin-sensitivity-in-diet-induced-obesity
#17
Shuhong Sun, Ran Wang, Jianwen Song, Ming Guan, Na Li, Xiaotian Zhang, Zhenwen Zhao, Junjie Zhang
Autotaxin (ATX), which is highly expressed and secreted by adipocytes, functions as the key enzyme to generate lysophosphatidic acid (LPA) from lysophosphatidylcholine (LPC). Adipose tissue is the main source of circulating ATX that modulates plasma LPA levels. Up-regulation of ATX expression in obese patients and mice is closely related with insulin resistance and impaired glucose tolerance. However, the mechanism of ATX expression in adipocytes remains largely unknown. In this study, we found that gp130-mediated JAK-STAT3 activation was required for abundant ATX expression in adipocytes...
September 5, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28874163/expression-of-factors-involved-in-apoptosis-and-cell-survival-is-correlated-with-enzymes-synthesizing-lysophosphatidic-acid-and-its-receptors-in-granulosa-cells-originating-from-different-types-of-bovine-ovarian-follicles
#18
Emilia Sinderewicz, Katarzyna Grycmacher, Dorota Boruszewska, Ilona Kowalczyk-Zięba, Joanna Staszkiewicz, Tomasz Ślężak, Izabela Woclawek-Potocka
BACKGROUND: Lysophosphatidic acid (LPA) regulates reproductive processes in the cow. Ovarian granulosa cells play a pivotal role in follicle growth and development. Nevertheless, the role of LPA in the local regulation of granulosa cell function in different follicle categories in the bovine ovary has not been investigated. METHODS: Ovarian follicles were divided into healthy, transitional and atretic categories. The expression levels of AX, PLA2, LPARs and factors involved in apoptosis and cell survival processes in granulosa cells in different types of follicles were measured by real-time PCR...
September 6, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28872401/substituting-sedentary-time-with-light-and-moderate-to-vigorous-physical-activity-is-associated-with-better-cardio-metabolic-health
#19
Sara Knaeps, Stijn De Baere, Jan Bourgois, Evelien Mertens, Ruben Charlier, Johan Lefevre
BACKGROUND: Apply a more novel approach to systematically examine (1) associations of clustered cardio-metabolic risk and cardio-metabolic risk factors, and (2) theoretical substitution of sedentary time with either sleep, light physical activity (LPA) or moderate-and-vigorous physical activity (MVPA) and substituting LPA with MVPA. METHODS: Physical activity and sleep were objectively measured in 410 Flemish adults (55.5[±9.6] years, 64% men) with a SenseWear Pro 3 Armband...
September 5, 2017: Journal of Physical Activity & Health
https://www.readbyqxmd.com/read/28871044/lpp3-mediates-self-generation-of-chemotactic-lpa-gradients-by-melanoma-cells
#20
Olivia Susanto, Yvette W H Koh, Nick Morrice, Sergey Tumanov, Peter A Thomason, Matthew Nielson, Luke Tweedy, Andrew J Muinonen-Martin, Jurre J Kamphorst, Gillian M Mackay, Robert H Insall
Melanoma cells steer out of tumours using self-generated lysophosphatidic acid (LPA) gradients. The cells break down LPA, which is present at high levels around the tumours, creating a dynamic gradient that is low in the tumour and high outside. They then also migrate up this gradient, creating a complex and evolving outward chemotactic stimulus. Here we introduce a new assay for self-generated chemotaxis, and show that raising LPA levels causes a delay in migration rather than loss of chemotactic efficiency...
September 4, 2017: Journal of Cell Science
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