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https://www.readbyqxmd.com/read/28506936/assessment-of-long-term-mortality-in-patients-with-complex-coronary-artery-disease-undergoing-percutaneous-intervention-comparison-of-multiple-anatomical-and-clinical-prognostic-risk-scores
#1
Bruno L Janella, Carlos M Campos, Adriano Caixeta, Breno O Almeida, Fabio Sandoli Brito, Alexandre Abizaid, Marco A Perin
AIMS: Three-vessel and left main coronary artery disease (CAD) have important prognostic implications. Consequently, numerous risk scores have been developed to stratify patients with complex CAD. The aim of the present study is to compare the predictive performance of six risk scores for occurrence of 4-year all-cause mortality. METHODS AND RESULTS: From March 2008 to December 2012, 348 consecutive patients with complex CAD undergoing percutaneous coronary intervention in a tertiary center in São Paulo, Brazil were analyzed...
May 16, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28505876/intermittency-induced-criticality-in-a-resistor-inductor-diode-circuit
#2
Stelios M Potirakis, Yiannis Contoyiannis, Fotios K Diakonos, Michael P Hanias
The current fluctuations of a driven resistor-inductor-diode circuit are investigated here looking for signatures of critical behavior monitored by the driving frequency. The experimentally obtained time series of the voltage drop across the resistor (as directly proportional to the current flowing through the circuit) were analyzed by means of the method of critical fluctuations in analogy to thermal critical systems. Intermittent criticality was revealed for a critical frequency band signifying the transition between the normal rectifier phase in the low frequencies and a full-wave conducting, capacitorlike phase in the high frequencies...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28502113/epigenetic-modifications-of-the-vh-region-after-djh-recombination-in-pro-b-cells
#3
Yanying Dong, Caijun Wu, Xiaohui Zhao, Ping Zhang, Hua Zhang, Mingzhe Zheng, Shichang Li, Junna Jiao, Xiaozhuo Yu, Zhuangwei Lv, Yanhong Ji
The variable region of murine immunoglobulin heavy chain (Igh) is assembled by sequential DH -JH and VH -DJH recombination. The accessibility of Igh locus determines the order of rearrangement. Because of the large number of VH genes and lack of a suitable model, the epigenetic modifications of VH genes after DJH recombination have not previously been characterized. Here, we employed two v-Abl pro-B cell lines, in which Igh locus is in germline and DJH -recombined configuration, respectively. The DJH junction displays the characteristics of recombination center, such as high levels of activation-associated histone modifications and recombination activating gene protein (RAG) binding in DJH -rearranged pro-B cells, which extend the recombination center model proposed for germline Igh locus...
May 14, 2017: Immunology
https://www.readbyqxmd.com/read/28493977/robust-multiple-frequency-multiple-power-localization-schemes-in-the-presence-of-multiple-jamming-attacks
#4
Ahmed Abdulqader Hussein, Chee Yen Leow, Tharek A Rahman
Localization of the wireless sensor network is a vital area acquiring an impressive research concern and called upon to expand more with the rising of its applications. As localization is gaining prominence in wireless sensor network, it is vulnerable to jamming attacks. Jamming attacks disrupt communication opportunity among the sender and receiver and deeply impact the localization process, leading to a huge error of the estimated sensor node position. Therefore, detection and elimination of jamming influence are absolutely indispensable...
2017: PloS One
https://www.readbyqxmd.com/read/28489057/an-optimized-facile-procedure-to-synthesize-and-purify-allicin
#5
Frank Albrecht, Roman Leontiev, Claus Jacob, Alan J Slusarenko
Allicin is a reactive sulfur species (RSS) and defence substance from garlic (Allium sativum L.). The compound is a broad-spectrum antibiotic that is also effective against multiple drug resistant (MDR) strains. A detailed protocol for allicin synthesis based on diallyl-disulfide (DADS) oxidation by H₂O₂ using acetic acid as a catalyst was published in 2001 by Lawson and Wang. Here we report on improvements to this basic method, clarify the mechanism of the reaction and show that it is zero-order with respect to DADS and first-order with respect to the concentration of H₂O₂...
May 10, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28472181/hypertrophic-scar-regression-is-linked-to-the-occurrence-of-endothelial-dysfunction
#6
Xi-Qiao Wang, Fei Song, Ying-Kai Liu
Most microvessels have been shown to become stenosed or completely occluded during hypertrophic scar progression. Here, we examined the morphology of capillary endothelial cells (ECs) and fibroblasts using immunofluorescence staining for CD31 and alpha-smooth muscle actin (α-SMA) and electron microscopy. In addition, ECs and fibroblasts were isolated from scar tissues, and the levels of transforming growth factor beta 1 (TGF-β1), platelet-derived growth factor (PDGF), endothelin 1 (ET-1), vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) were assayed using ELISAs...
2017: PloS One
https://www.readbyqxmd.com/read/28468291/canoe-an-autonomous-infrastructure-free-indoor-navigation-system
#7
Kai Dong, Wenjia Wu, Haibo Ye, Ming Yang, Zhen Ling, Wei Yu
The development of the Internet of Things (IoT) has accelerated research in indoor navigation systems, a majority of which rely on adequate wireless signals and sources. Nonetheless, deploying such a system requires periodic site-survey, which is time consuming and labor intensive. To address this issue, in this paper we present Canoe, an indoor navigation system that considers shopping mall scenarios. In our system, we do not assume any prior knowledge, such as floor-plan or the shop locations, access point placement or power settings, historical RSS measurements or fingerprints, etc...
April 30, 2017: Sensors
https://www.readbyqxmd.com/read/28466384/splicing-factor-mutations-in-mds-rars-and-mds-mpn-rs-t
#8
REVIEW
Akihide Yoshimi, Omar Abdel-Wahab
Spliceosomal mutations, especially mutations in SF3B1, are frequently (>80%) identified in patients with refractory anemia with ringed sideroblasts (RARS) and myelodysplastic/myeloproliferative neoplasms with ringed sideroblasts and thrombocytosis (MDS/MPN-RS-T; previously known as RARS-T), and SF3B1 mutations have a high positive predictive value for disease phenotype with ringed sideroblasts. These observations suggest that SF3B1 mutations play important roles in the pathogenesis of these disorders and formation of ringed sideroblasts...
June 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28466100/sedative-effects-of-oral-pregabalin-premedication-on-intravenous-sedation-using-propofol-target-controlled-infusion
#9
Noriko Karube, Shinichi Ito, Saori Sako, Jun Hirokawa, Takeshi Yokoyama
PURPOSE: The sedative effects of pregabalin during perioperative period have not been sufficiently characterized. The aim of this study was to verify the sedative effects of premedication with pregabalin on intravenous sedation (IVS) using propofol and also to assess the influences of this agent on circulation, respiration, and postanesthetic complications. METHODS: Ten healthy young volunteers underwent 1 h of IVS using propofol, three times per subject, on separate days (first time, no pregabalin; second time, pregabalin 100 mg; third time, pregabalin 200 mg)...
May 2, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28463818/high-frequency-somatosensory-stimulation-increases-sensori-motor-inhibition-and-leads-to-perceptual-improvement-in-healthy-subjects
#10
Lorenzo Rocchi, Roberto Erro, Elena Antelmi, Alfredo Berardelli, Michele Tinazzi, Rocco Liguori, Kailash Bhatia, John Rothwell
OBJECTIVE: High frequency repetitive somatosensory stimulation (HF-RSS), which is a patterned electric stimulation applied to the skin through surface electrodes, improves two-point discrimination, somatosensory temporal discrimination threshold (STDT) and motor performance in humans. However, the mechanisms which underlie these changes are still unknown. In particular, we hypothesize that refinement of inhibition might be responsible for the improvement in spatial and temporal perception...
June 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28459696/wireless-capsule-gastrointestinal-endoscopy-direction-of-arrival-estimation-based-localization-survey
#11
Nilanjan Dey, Amira S Ashour, Fuquian Shi, Robert Simon Sherratt
One of the significant challenges in Capsule Endoscopy (CE) is to precisely determine the pathologies location. The localization process is primarily estimated using the received signal strength from sensors in the capsule system through its movement in the gastrointestinal (GI) tract. Consequently, the wireless capsule endoscope (WCE) system requires improvement to handle the lack of the capsule instantaneous localization information and to solve the relatively low transmission data rate challenges. Furthermore, the association between the capsule's transmitter position, capsule location, signal reduction and the capsule direction should be assessed...
April 25, 2017: IEEE Reviews in Biomedical Engineering
https://www.readbyqxmd.com/read/28456907/bispectral-index-monitoring-in-cancer-patients-undergoing-palliative-sedation-a-preliminary-report
#12
Edith Monreal-Carrillo, Silvia Allende-Pérez, David Hui, Maria-Fernanda García-Salamanca, Eduardo Bruera, Emma Verástegui
INTRODUCTION: Continuous palliative sedation (PS) is currently titrated based on clinical observation; however, it is often unclear if patients are still aware of their suffering. The aim of this prospective study is to characterize the level of consciousness in patients undergoing PS using Bispectral Index (BIS) monitoring. PATIENTS AND METHODS: We enrolled consecutive patients with refractory symptoms requiring PS. We documented the level of sedation using Ramsay Sedation Scale (RSS) and BIS at 0, 2, 4, 6, 12, and 24 h during the first day of PS and examined their degree of association...
April 29, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28454924/dual-effect-of-silymarin-on-experimental-non-alcoholic-steatohepatitis-induced-by-irinotecan
#13
Eudmar Marcolino Assis-Júnior, Anielle Torres Melo, Venúcia Bruna Magalhães Pereira, Deysi Viviana Tenazoa Wong, Nathalia Ribeiro Pinho Sousa, Christiane Mendes Gonçalves Oliveira, Lara Raissa Cavalcante Malveira, Leonardo Silva Moreira, Marcellus Henrique Loiola Ponte Souza, Paulo Roberto Carvalho Almeida, Roberto César Pereira Lima-Júnior
Irinotecan-based regimens are commonly used for treatment of colorectal cancer, which is limited by mucositis and non-alcoholic steatohepatitis (NASH). Silymarin (SIL) prevents fatty liver disease in the clinical setting and in models of liver damage induced chemically. This study investigated the possible effect of SIL on irinotecan (IRI)-induced NASH. Swiss female mice were injected with saline (SAL 5ml/kg i.p.), IRI (50mg/kg i.p.), SIL (150mg/kg p.o.) or IRI (50mg/kg i.p.)+(SIL 1.5, 15 or 150mg/kg p.o.) thrice/week/7weeks...
April 26, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28451253/reversible-ratiometric-detection-of-highly-reactive-hydropersulfides-using-a-fret-based-dual-emission-fluorescent-probe
#14
Ryosuke Kawagoe, Ippei Takashima, Shohei Uchinomiya, Akio Ojida
Hydropersulfide (R-SSH) is an important class of reactive sulfur species (RSS) involved in a variety of physiological processes in mammals. A fluorescent probe capable of real-time detection of hydropersulfide levels in living cells would be a versatile tool to elucidate its roles in cell signalling and redox homeostasis. In this paper, we report a ratiometric fluorescent probe for hydropersulfide sensing, based on a fluorescence resonance energy transfer (FRET) mechanism. This sensing mechanism involves a nucleophilic reaction of a hydropersulfide with the pyronine-unit of the probe, which modulates the intramolecular FRET efficiency to induce a dual-emission change...
February 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28448464/bayesian-device-free-localization-and-tracking-in-a-binary-rf-sensor-network
#15
Zhenghuan Wang, Heng Liu, Shengxin Xu, Xiangyuan Bu, Jianping An
Received-signal-strength-based (RSS-based) device-free localization (DFL) is a promising technique since it is able to localize the person without attaching any electronic device. This technology requires measuring the RSS of all links in the network constituted by several radio frequency (RF) sensors. It is an energy-intensive task, especially when the RF sensors work in traditional work mode, in which the sensors directly send raw RSS measurements of all links to a base station (BS). The traditional work mode is unfavorable for the power constrained RF sensors because the amount of data delivery increases dramatically as the number of sensors grows...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448151/methoxysulfinyl-radical-ch3oso-gas-phase-generation-photochemistry-and-oxidation
#16
Qifan Liu, Zhuang Wu, Jian Xu, Yan Lu, Hongmin Li, Xiaoqing Zeng
Methylsulfoxide radicals CH3SOx (x = 1-4) are key reactive sulfur species (RSS) in the atmospheric oxidation of volatile organic sulfur compounds (VOSCs). Through flash vacuum pyrolysis (FVP) of trifluoromethanesulfinic acid methyl ester CF3S(O)OCH3 at 1000 K, the methoxysulfinyl radical CH3OSO has been generated in the gas phase and subsequently characterized in cryogenic N2, Ar, and Ne matrices by IR spectroscopy. Upon 266 nm laser irradiation, CH3OSO efficiently isomerizes to the less stable methylsulfonyl radical CH3SO2 in matrices without noticeable decomposition...
May 4, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28447227/the-efficacy-of-serratus-anterior-plane-block-in-analgesia-for-thoracotomy-a-retrospective-study
#17
Korgün Ökmen, Burcu Metin Ökmen
PURPOSE: A multimodal analgesic approach is necessary for post-thoracotomy pain, which can be severe. Intravenous access, central and peripheral nerve blocks are frequently used. The aim of this study was to evaluate the efficacy of serratus anterior plane block (SAPB) in the management of post-thoracotomy pain. METHODS: A total of 40 patients who underwent thoracotomy between January 2014 and January 2016 were retrospectively analyzed. The patients were divided into two groups: Group M (intravenous patient-controlled analgesia morphine; n = 20) and Group S (intravenous patient-controlled analgesia morphine + SAPB; n = 20)...
April 26, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28443673/fluorescent-probes-and-selective-inhibitors-for-biological-studies-of-hydrogen-sulfide-and-polysulfide-mediated-signaling
#18
Yoko Takano, Honami Echizen, Kenjiro Hanaoka
SIGNIFICANCE: Hydrogen sulfide (H2S) plays roles in many physiological processes, including relaxation of vascular smooth muscles, mediation of neurotransmission, inhibition of insulin signaling, and regulation of inflammation. Also, hydropersulfide (R-S-SH) and polysulfide (-S-Sn-S-) have recently been identified as reactive sulfur species (RSS) that regulate the bioactivities of multiple proteins via S-sulfhydration of cysteine residues (protein Cys-SSH) and show cytoprotection. Chemical tools such as fluorescent probes and selective inhibitors are needed to establish in detail the physiological roles of H2S and polysulfide...
May 18, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28429269/alternative-carbon-dioxide-modelling-approaches-accounting-for-high-residual-gases-in-landgem
#19
Nathan Bruce, Kelvin Tsun Wai Ng, Amy Richter
High Canadian waste disposal rates necessitate landfill gas monitoring and accurate forecasting. CO2 estimates in LandGEM version 3.02 currently rest on the assumptions that CO2 is a function of CH4, where the two gases make up nearly 100% of landfill gas content, leading to overestimated CO2 collection estimates. A total of 25 cases (five formulas, five approaches) compared annual CO2 collection at four western Canadian landfills. Despite common use in literature, the 1:1 ratio of CH4 to CO2 was not recommended to forecast landfill gas collection in cold climates...
April 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28422846/application-of-remifentanil-for-conscious-sedation-and-analgesia-in-short-term-ercp-and-est-surgery
#20
RANDOMIZED CONTROLLED TRIAL
Guo-Qiang Sun, Bao-Feng Gao, Guan-Jun Li, Yun-Long Lei, Jie Li
This study aims to observe and evaluate the use of remifentanil in conscious sedation and analgesia for the safety and comfort of patients undergoing short-term endoscopic retrograde cholangiopancreatography (ERCP) and endoscopic sphincterotomy (EST).Sixty-eight patients who underwent ERCP and EST were randomly divided into two groups: research group and control group. Patients in the research group were intravenously injected with remifentanil (80-2/3* age) for 1 to 2 minutes, combined with the intravenous injection of propofol (20-30 mg) during the course of treatment...
April 2017: Medicine (Baltimore)
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