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https://www.readbyqxmd.com/read/28222005/a-modular-low-complexity-ecg-delineation-algorithm-for-real-time-embedded-systems
#1
Jose Manuel Bote, Joaquin Recas, Francisco Rincon, David Atienza, Roman Hermida
This work presents a new modular and lowcomplexity algorithm for the delineation of the different ECG waves (QRS, P and T peaks, onsets and end). Involving a reduced number of operations per second and having a small memory footprint, this algorithm is intended to perform realtime delineation on resource-constrained embedded systems. The modular design allows the algorithm to automatically adjust the delineation quality in run time to a wide range of modes and sampling rates, from a Ultra-low power mode when no arrhythmia is detected, in which the ECG is sampled at low frequency, to a complete High-accuracy delineation mode in which the ECG is sampled at high frequency and all the ECG fiducial points are detected, in case of arrhythmia...
February 17, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28214453/reciprocal-regulation-of-enos-h2s-and-co-synthesizing-enzymes-in-human-atheroma-correlation-with-plaque-stability-and-effects-of-simvastatin
#2
Fragiska Sigala, Panagiotis Efentakis, Dimitra Karageorgiadi, Konstadinos Filis, Paraskevas Zampas, Efstathios K Iliodromitis, George Zografos, Andreas Papapetropoulos, Ioanna Andreadou
The molecular and cellular mechanisms underlying plaque destabilization remain obscure. We sought to elucidate the correlation between NO, H2S and CO-generating enzymes, nitro-oxidative stress and plaque stability in carotid arteries. Carotid atherosclerotic plaques were collected from 62 patients who had undergone endarterectomy due to internal artery stenosis. Following histological evaluation the plaques were divided into stable and unstable ones. To investigate the impact of simvastatin we divided patients with stable plaques, into those receiving and to those not receiving simvastatin...
February 12, 2017: Redox Biology
https://www.readbyqxmd.com/read/28213472/%C3%AE-2-microglobulin-participates-in-development-of-lung-emphysema-by-inducing-lung-epithelial-cells-senescence
#3
Na Gao, Ying Wang, Chun-Ming Zheng, Yan-Li Gao, Hui Li, Yan Li, Ting-Ting Fu, Li-Li Xu, Wei Wang, Sun Ying, Kewu Huang
β2-microglobulin (β2m), the light chain of major histocompatibility complex class 1 (MHC I), has been identified as a pro-aging factors and involved in the pathogenesis of neurodegenerative disorders by driving cognitive and regenerative impairments. However, little attention has focused on the effect of β2m in development of lung emphysema. Here, we found that concentrations of β2m in plasma were significantly elevated in patients with lung emphysema than those in normal control subjects (1.89 ± 0.12 mg/l vs 1...
February 17, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28212299/exogenous-and-endogenous-hydrogen-sulfide-protects-gastric-mucosa-against-the-formation-and-time-dependent-development-of-ischemia-reperfusion-induced-acute-lesions-progressing-into-deeper-ulcerations
#4
Marcin Magierowski, Katarzyna Magierowska, Magdalena Hubalewska-Mazgaj, Zbigniew Sliwowski, Robert Pajdo, Grzegorz Ginter, Slawomir Kwiecien, Tomasz Brzozowski
Hydrogen sulfide (H₂S) is an endogenous mediator, synthesized from l-cysteine by cystathionine γ-lyase (CSE), cystathionine β-synthase (CBS) or 3-mercaptopyruvate sulfurtransferase (3-MST). The mechanism(s) involved in H₂S-gastroprotection against ischemia/reperfusion (I/R) lesions and their time-dependent progression into deeper gastric ulcerations have been little studied. We determined the effect of l-cysteine, H₂S-releasing NaHS or slow H₂S releasing compound GYY4137 on gastric blood flow (GBF) and gastric lesions induced by 30 min of I followed by 3, 6, 24 and 48 h of R...
February 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28211191/cigarette-smoking-increases-bronchial-mucosal-il-17a-expression-in-asthmatics-which-acts-in-concert-with-environmental-aeroallergens-to-engender-neutrophilic-inflammation
#5
Leonard Quok Chean Siew, Shih-Ying Wu, Sun Ying, Christopher John Corrigan
BACKGROUND: Mild asthmatics who smoke cigarettes may develop unstable disease and neutrophilic infiltration of the airways, features more usually associated with severe asthmatic disease. The mechanisms giving rise to this response remain unclear. OBJECTIVE: To address the hypothesis that smoking increases bronchial mucosal production of IL-17A which acts on bronchial epithelial cells directly and in concert with other environmental stimuli to induce the production of IL-6 and neutrophil chemotaxins...
February 17, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28203404/the-role-of-cyclooxygenase-2-in-the-protection-against-apoptosis-in-vascular-endothelial-cells-induced-by-cigarette-smoking
#6
Zhihui Shi, Yan Chen, Yanfang Pei, Yingjiao Long, Caihong Liu, Jun Cao, Ping Chen
BACKGROUND: Apoptosis has been demonstrated to be an important upstream event in the pathogenesis of chronic obstructive pulmonary disease (COPD). Cyclooxygenase-2 (COX-2) seems to be biologically relevant in COPD. However, the role of COX-2 in the apoptosis in vascular endothelial cells induced by cigarette smoke extract (CSE) remains to be elucidated. Our recent study found that the prostacyclin, one of the COX products in the microvascular endothelium, inhibited apoptosis in the emphysematous lungs of rats induced by CSE...
January 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28196790/screening-for-child-sexual-exploitation-in-online-sexual-health-services-an-exploratory-study-of-expert-views
#7
Victoria Spencer-Hughes, Jonathan Syred, Alison Allison, Gillian Holdsworth, Paula Baraitser
BACKGROUND: Sexual health services routinely screen for child sexual exploitation (CSE). Although sexual health services are increasingly provided online, there has been no research on the translation of the safeguarding function to online services. We studied expert practitioner views on safeguarding in this context. OBJECTIVE: The aim was to document expert practitioner views on safeguarding in the context of an online sexual health service. METHODS: We conducted semistructured interviews with lead professionals purposively sampled from local, regional, or national organizations with a direct influence over CSE protocols, child protection policies, and sexual health services...
February 14, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28195277/dentin-bonding-durability-of-two-step-self-etch-adhesives-with-improved-of-degree-of-conversion-of-adhesive-resins
#8
Kento Sato, Keiichi Hosaka, Masahiro Takahashi, Masaomi Ikeda, Fucong Tian, Wataru Komada, Masatoshi Nakajima, Richard Foxton, Yoshihiro Nishitani, David H Pashley, Junji Tagami
PURPOSE: To evaluate (1) the initial and long-term microtensile bond strengths of two-step self-etch adhesives with different degrees of conversion (DC); (2) the elastic modulus of the respective adhesive resins; (3) the water sorption of the respective adhesive resins. MATERIALS AND METHODS: Two two-step self-etch adhesives, Clearfil SE Bond (CSE) and Clearfil SE Bond 2 (CSE2) were used in this study. The DC was determined using ATR/FT-IR with a time-based spectrum analysis...
February 10, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28195210/cigarette-smoke-attenuates-phagocytic-ability-of-macrophages-through-down-regulating-milk-fat-globule-egf-factor-8-mfg-e8-expressions
#9
Yueqin Wang, Guangwei Luo, Jie Chen, Rui Jiang, Jianhua Zhu, Na Hu, Wei Huang, Guilian Cheng, Min Jia, Bingtao Su, Nian Zhang, Tianpen Cui
Chronic obstructive pulmonary disease (COPD) is one of the most common inflammatory diseases resulting from habitual smoking. Impaired clearance of apoptotic cell by airway macrophages contributes to lung inflammation. Milk fat globule-EGF factor 8 (MFG-E8), as a link between apoptotic cells and phagocytes, facilitates clearance of apoptotic cells and attenuates inflammation. We sought to investigate altered expression and potential role of MFG-E8 in COPD. In this study, apoptosis was increased and the level of MFG-E8 was decreased while HMGB1 expression was increased in lung tissues of CS-exposed mice...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28190853/high-snr-acquisitions-improve-the-repeatability-of-liver-fat-quantification-using-confounder-corrected-chemical-shift-encoded-mr-imaging
#10
Utaroh Motosugi, Diego Hernando, Curtis Wiens, Peter Bannas, Scott B Reeder
PURPOSE: To determine whether high signal-to-noise ratio (SNR) acquisitions improve the repeatability of liver proton density fat fraction (PDFF) measurements using confounder-corrected chemical shift-encoded magnetic resonance (MR) imaging (CSE-MRI). MATERIALS AND METHODS: Eleven fat-water phantoms were scanned with 8 different protocols with varying SNR. After repositioning the phantoms, the same scans were repeated to evaluate the test-retest repeatability. Next, an in vivo study was performed with 20 volunteers and 28 patients scheduled for liver magnetic resonance imaging (MRI)...
February 13, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28188215/cystathionine-gamma-lyase-protects-vascular-endothelium-a-role-for-inhibition-of-histone-deacetylase-6
#11
Thorsten Martin Leucker, Yohei Nomura, Jae Hyung Kim, Anil Bhatta, Victor Wang, Andrea Wecker, Sandeep S Jandu, Lakshmi Santhanam, Dan E Berkowitz, Lewis Romer, Deepesh Pandey
Endothelial cystathionine -lyase (CSE) contributes to cardiovascular homeostasis, mainly through production of hydrogen sulfide. However, the molecular mechanisms that control CSE gene expression in endothelium during cardiovascular diseases are unclear. The aim of the current study is to determine the role of specific histone deacetylases (HDAC) in the regulation of endothelial CSE. Reduced CSE mRNA expression and protein abundance were observed in human aortic endothelial cells (HAEC) exposed to OxLDL and in aortas from atherogenic ApoE-/- mice fed a high-fat diet as compared with controls...
February 10, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28188160/endogenous-hydrogen-sulfide-contributes-to-uterine-quiescence-during-pregnancy
#12
Xingji You, Zixi Chen, Huina Zhao, Chen Xu, Weina Liu, Qianqian Sun, Ping He, Hang Gu, Xin Ni
Recent evidence suggests that uterine activation for labor is associated with inflammation within uterine tissues. Hydrogen sulfide (H2S) plays a critical role in inflammatory responses in various tissues. Our previous study has shown that human myometrium produces H2S via its generating enzymes cystathionine-γ-lyase (CSE) and cystathionine-β-synthetase (CBS) during pregnancy. We therefore explored whether H2S plays a role in the maintenance of uterine quiescence during pregnancy. Human myometrial biopsies were obtained from pregnant women at term...
February 10, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28186975/amp-activated-protein-kinase-reduces-inflammatory-responses-and-cellular-senescence-in-pulmonary-emphysema
#13
Xiao-Yu Cheng, Yang-Yang Li, Cheng Huang, Jun Li, Hong-Wei Yao
Current drug therapy fails to reduce lung destruction of chronic obstructive pulmonary disease (COPD). AMP-activated protein kinase (AMPK) has emerged as an important integrator of signals that control energy balance and lipid metabolism. However, there are no studies regarding the role of AMPK in reducing inflammatory responses and cellular senescence during the development of emphysema. Therefore, we hypothesize that AMPK reduces inflammatroy responses, senescence, and lung injury. To test this hypothesis, human bronchial epithelial cells (BEAS-2B) and small airway epithelial cells (SAECs) were treated with cigarette smoke extract (CSE) in the presence of a specific AMPK activator (AICAR, 1 mM) and inhibitor (Compound C, 5 μM)...
February 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28185985/activating-transcription-factor-3-represses-cigarette-smoke-induced-il6-and-il8-expression-via-suppressing-nf-%C3%AE%C2%BAb-activation
#14
Yan-Ping Wu, Chao Cao, Yin-Fang Wu, Miao Li, Tian-Wen Lai, Chen Zhu, Yong Wang, Song-Min Ying, Zhi-Hua Chen, Hua-Hao Shen, Wen Li
Airway and lung inflammation is a fundamental hallmark of chronic obstructive pulmonary disease (COPD). Activating transcription factor 3 (ATF3) has been reported to negatively regulate many pro-inflammatory cytokines and chemokines. However, little is known about the impact of ATF3 on the inflammatory response of COPD. Since cigarette smoke (CS) is considered to be the most important risk factor in the etiology of COPD, we attempted to investigate the effects and molecular mechanisms of ATF3 in CS-induced inflammation...
February 6, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28185549/correcting-the-impact-of-docking-pose-generation-error-on-binding-affinity-prediction
#15
Hongjian Li, Kwong-Sak Leung, Man-Hon Wong, Pedro J Ballester
BACKGROUND: Pose generation error is usually quantified as the difference between the geometry of the pose generated by the docking software and that of the same molecule co-crystallised with the considered protein. Surprisingly, the impact of this error on binding affinity prediction is yet to be systematically analysed across diverse protein-ligand complexes. RESULTS: Against commonly-held views, we have found that pose generation error has generally a small impact on the accuracy of binding affinity prediction...
September 22, 2016: BMC Bioinformatics
https://www.readbyqxmd.com/read/28182494/dynamic-adjustments-of-attentional-control-in-healthy-aging
#16
Andrew J Aschenbrenner, David A Balota
In standard attentional control tasks, interference effects are reduced following incongruent trials compared to congruent trials, a phenomenon known as the congruency sequence effect (CSE). Typical explanations of this effect suggest the CSE is due to changes in levels of control across adjacent trials. This interpretation has been questioned by the finding that older adults, individuals with impaired attentional control systems, have been shown to produce larger CSEs in the Stroop task compared with younger adult controls...
February 2017: Psychology and Aging
https://www.readbyqxmd.com/read/28177058/effect-of-tobacco-smoke-on-hydrogen-sulfide-induced-rat-thoracic-aorta-relaxation
#17
H T Zhang, T Zhang, M Chai, J J Sun, X Y Yu, C Z Liu, C C Huang
Levels of hydrogen sulfide (H2S), a gaseous signaling molecule, are reduced in the serum of individuals who smoke. We hypothesized that tobacco smoke influenced smooth muscle relaxation by decreasing H2S levels and this effect could also influence expression of cystathionine γ-lyase (CSE) and sulfonylurea receptor-2 (SUR-2). The aim of this study was to explore the effect of tobacco smoke on H2S-mediated rat thoracic aorta relaxation and its possible mechanism. Thirty-two Sprague-Dawley rats were divided into four groups: control (C) group, short-term smoker (SS) group, mid-term smoker (MS) group, and long-term smoker (LS) group...
February 6, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28168369/chemical-shift-effect-predicting-lymph-node-status-in-rectal-cancer-using-high-resolution-mr-imaging-with-node-for-node-matched-histopathological-validation
#18
Hongmei Zhang, Chongda Zhang, Zhaoxu Zheng, Feng Ye, Yuan Liu, Shuangmei Zou, Chunwu Zhou
OBJECTIVES: To evaluate the value of the chemical shift effect (CSE) as well as other criteria for the prediction of lymph node status. MATERIALS AND METHODS: Twenty-nine patients who underwent radical surgery of rectal cancers were studied with pre- and postoperative specimen MRI. Lymph nodes were harvested from transverse whole-mount specimens and compared with in vivo and ex vivo images to obtain a precise slice-for-section match. Preoperative MR characteristics including CSE, as well as other predictors, were evaluated by two readers independently between benign and metastatic nodes...
February 6, 2017: European Radiology
https://www.readbyqxmd.com/read/28167924/how-configural-is-the-configural-superiority-effect-a-neuroimaging-investigation-of-emergent-features-in-visual-cortex
#19
Olivia M Fox, Assaf Harel, Kevin B Bennett
The perception of a visual stimulus is dependent not only upon local features, but also on the arrangement of those features. When stimulus features are perceptually well organized (e.g., symmetric or parallel), a global configuration with a high degree of salience emerges from the interactions between these features, often referred to as emergent features. Emergent features can be demonstrated in the Configural Superiority Effect (CSE): presenting a stimulus within an organized context relative to its presentation in a disarranged one results in better performance...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28160688/the-association-between-aerobic-fitness-and-congruency-sequence-effects-in-preadolescent-children
#20
Daniel R Westfall, Shih-Chun Kao, Mark R Scudder, Matthew B Pontifex, Charles H Hillman
Aerobic fitness has previously been related to cognitive control in preadolescents; however, these investigations have generally relied on global measures of performance. Thus, we have little understanding of how aerobic fitness may relate to trial-by-trial modulations in cognitive control. This study utilized congruency sequence effects (CSEs), which characterize how behavior on the current trial is influenced by the previous trial, to investigate the relation of aerobic fitness on varying levels of cognitive control...
February 2, 2017: Brain and Cognition
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