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https://www.readbyqxmd.com/read/28231640/mind-the-gap-mechanisms-regulating-the-endothelial-barrier
#1
REVIEW
Mariya Y Radeva, Jens Waschke
The endothelial barrier consists of intercellular contacts localized in the cleft between endothelial cells, which is covered by the glycocalyx in a sieve-like manner. Both types of barrier-forming junctions, i.e. the adherens junction (AJ) serving mechanical anchorage and mechanotransduction and the tight junction (TJ) sealing the intercellular space to limit paracelullar permeability, are tethered to the actin cytoskeleton. Under resting conditions, the endothelium thereby builds a selective layer controlling the exchange of fluid and solutes with the surrounding tissue...
February 23, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28231638/comparison-of-the-shock-absorption-capacities-of-different-mouthguards
#2
Melina Simonetta Bochnig, Min-Jung Oh, Theresa Nagel, Fred Ziegler, Paul-Georg Jost-Brinkmann
BACKGROUND/AIMS: In this in vitro study the protective qualities of different mouthguard types were examined during small hard object collisions. The aim was to investigate inconclusive aspects of hard inserts, nylon nets and air spaces as reinforcements in the anterior region and the protection qualities of ethylene vinyl acetate (EVA). MATERIALS AND METHODS: Five different mouthguards with a labial thickness between 2 mm and 11 mm made of materials of varying stiffness were investigated...
February 23, 2017: Dental Traumatology: Official Publication of International Association for Dental Traumatology
https://www.readbyqxmd.com/read/28231501/hsp70-expression-in-biomphalaria-glabrata-snails-exposed-to-cadmium
#3
Rebeca da Silva Cantinha, Sueli Ivone Borrely, Nancy Oguiura, Carlos Alberto de Bragança Pereira, Marcela M Rigolon, Eliana Nakano
In this study, the effects of the heavy metal cadmium on the stress protein HSP70 are investigated in freshwater mollusks Biomphalaria glabrata. Adult snails were exposed for 96h to CdCl2 at concentrations ranging from 0.09 to 0.7mgL(-1) (LC50/96h=0.34 (0.30-0.37). Time and concentration-dependent increases in the expression of HSP70 were observed at sub-lethal levels in the immunoblotting assay. Further, an increased survival to a lethal heat shock was observed in animals pre-exposed to a nonlethal concentration of cadmium, evidencing the induction of acquired tolerance...
February 20, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28231324/a-framework-for-analyzing-contagion-in-assortative-banking-networks
#4
Thomas R Hurd, James P Gleeson, Sergey Melnik
We introduce a probabilistic framework that represents stylized banking networks with the aim of predicting the size of contagion events. Most previous work on random financial networks assumes independent connections between banks, whereas our framework explicitly allows for (dis)assortative edge probabilities (i.e., a tendency for small banks to link to large banks). We analyze default cascades triggered by shocking the network and find that the cascade can be understood as an explicit iterated mapping on a set of edge probabilities that converges to a fixed point...
2017: PloS One
https://www.readbyqxmd.com/read/28231313/a-stochastic-hybrid-systems-based-framework-for-modeling-dependent-failure-processes
#5
Mengfei Fan, Zhiguo Zeng, Enrico Zio, Rui Kang, Ying Chen
In this paper, we develop a framework to model and analyze systems that are subject to dependent, competing degradation processes and random shocks. The degradation processes are described by stochastic differential equations, whereas transitions between the system discrete states are triggered by random shocks. The modeling is, then, based on Stochastic Hybrid Systems (SHS), whose state space is comprised of a continuous state determined by stochastic differential equations and a discrete state driven by stochastic transitions and reset maps...
2017: PloS One
https://www.readbyqxmd.com/read/28231050/original-research-paper-pulmonary-prophylactic-impact-of-melatonin-and-or-quercetin-a-novel-therapy-for-inflammatory-hypoxic-stress-in-rats
#6
Nouf M Al-Rasheed, Laila Fadda, Hala A Attia, Iman A Sharaf, Azza M Mohamed, Nawal M Al-Rasheed
The study aims to compare, through histological and biochemical studies, the effects of quercetin, melatonin and their combination in regulation of immuno-inflammatory mediators and heat shock protein expressions in sodium nitrite induced hypoxia in rat lungs. The results revealed that NaNO2 injection caused a significant decrease in Hb in rats, while serum levels of TNF-α, IL-6 and CRP, VEGF and HSP70 were elevated compared to the control group. Administration of melatonin, quercetin or their combination before NaNO2 injection markedly reduced these parameters...
March 1, 2017: Acta Pharmaceutica
https://www.readbyqxmd.com/read/28230869/a-combined-high-temperature-experimental-and-theoretical-kinetic-study-of-the-reaction-of-dimethyl-carbonate-with-oh-radicals
#7
Fethi Khaled, Binod Raj Giri, Milán Szőri, Tam V-T Mai, Lam K Huynh, Aamir Farooq
The reaction kinetics of dimethyl carbonate (DMC) and OH radicals were investigated behind reflected shock waves over the temperature range of 872-1295 K and at pressures near 1.5 atm. Reaction progress was monitored by detecting OH radicals at 306.69 nm using a UV laser absorption technique. The rate coefficients for the reaction of DMC with OH radicals were extracted using a detailed kinetic model developed by Glaude et al. (Proc. Combust. Inst. 2005, 30(1), 1111-1118). The experimental rate coefficients can be expressed in Arrhenius form as: kexpt'l = 5...
February 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28230635/valproic-acid-modulates-platelet-and-coagulation-function-ex-vivo
#8
Ted Bambakidis, Simone E Dekker, Ihab Halaweish, Baoling Liu, Vahagn C Nikolian, Patrick E Georgoff, Patryk Piascik, Yongqing Li, Martin Sillesen, Hasan B Alam
Trauma-induced coagulopathy is associated with adverse patient outcome. Animal models demonstrate that histone deacetylase inhibitors, such as valproic acid (VPA), improve survival following injury. While in-vivo data suggest that improved survival may in part be because of an attenuation of coagulopathy, it remains unknown whether this is a direct effect of the drug, or the establishment of an overall prosurvival phenotype. We thus conducted an ex-vivo experiment to determine if VPA has an effect on coagulation and platelet function...
February 21, 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28230556/comparison-of-automated-methods-versus-the-american-burn-association-sepsis-definition-to-identify-sepsis-and-sepsis-with-organ-dysfunction-septic-shock-in-burn-injured-adults
#9
Megan A Rech, Michael J Mosier, Susan Zelisko, Giora Netzer, Elizabeth J Kovacs, Majid Afshar
To develop an algorithm to identify sepsis and sepsis with organ dysfunction/septic shock in burn-injured patients incorporating criteria from the American Burn Association sepsis definition that possesses good test characteristics compared with International Classification of Diseases, Ninth Revision-Clinical Modification (ICD-9) codes and an algorithm previously validated in nonburn-injured septic patients (Martin et al method). This was a retrospective cohort study of consecutive patients admitted to the burn intensive care unit between January 2008 and March 2015...
February 22, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28229927/alteration-of-n-glycan-expression-profile-and-glycan-pattern-of-glycoproteins-in-human-hepatoma-cells-after-hcv-infection
#10
Tian Xiang, Ganglong Yang, Xiaoyu Liu, Yidan Zhou, Zhongxiao Fu, Fangfang Lu, Jianguo Gu, Naoyuki Taniguchi, Zengqi Tan, Xi Chen, Yan Xie, Feng Guan, Xiao-Lian Zhang
BACKGROUND: Hepatitis C virus (HCV) infection causes chronic liver diseases, liver fibrosis and even hepatocellular carcinoma (HCC). However little is known about any information of N-glycan pattern in human liver cell after HCV infection. METHODS: The altered profile of N-glycans in HCV-infected Huh7.5.1 cell were analyzed by using mass spectrometry. Then, lectin microarray, lectin pull-down assay, reverse transcription-quantitative real time PCR (RT-qPCR) and western-blotting were used to identify the altered N-glycosylated proteins and glycosyltransferases...
February 13, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28229893/safety-and-efficacy-of-natalizumab-in-patients-with-acute-ischaemic-stroke-action-a-randomised-placebo-controlled-double-blind-phase-2-trial
#11
Jacob Elkins, Roland Veltkamp, Joan Montaner, S Claiborne Johnston, Aneesh B Singhal, Kyra Becker, Maarten G Lansberg, Weihua Tang, Ih Chang, Kumar Muralidharan, Sarah Gheuens, Lahar Mehta, Mitchell S V Elkind
BACKGROUND: In animal models of acute ischaemic stroke, blocking of the leukocyte-endothelium adhesion by antagonism of α4 integrin reduces infarct volumes and improves outcomes. We assessed the effect of one dose of natalizumab, an antibody against the leukocyte adhesion molecule α4 integrin, in patients with acute ischaemic stroke. METHODS: In this double-blind, phase 2 study, patients with acute ischaemic stroke (aged 18-85 years) from 30 US and European clinical sites were randomly assigned (1:1) to 300 mg intravenous natalizumab or placebo with stratification by treatment window and baseline infarct size...
March 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28229198/-catheter-ablation-of-ventricular-tachycardia-what-have-we-achieved
#12
T Konrad, B A Hoffmann, T Rostock
The role of catheter ablation in patients with ventricular tachycardia (VT) has evolved over the last two decades into an established treatment option. In patients with idiopathic VT catheter ablation is the gold standard treatment option with high effectiveness and low risk of complications. Due to the high risk of side effects the use of antiarrhythmic drugs is only indicated in exceptional cases. In patients with structural heart diseases, such as ischemic and dilated cardiomyopathy, VT is the most frequent cause of death...
February 22, 2017: Herz
https://www.readbyqxmd.com/read/28229195/predictors-for-uroseptic-shock-in-patients-who-undergo-minimally-invasive-percutaneous-nephrolithotomy
#13
Junhong Fan, Shawpong Wan, Luhao Liu, Zhijian Zhao, Zanlin Mai, Dong Chen, Wei Zhu, Zhou Yang, Lili Ou, Wenqi Wu
To identify risk factors that can predict which patient is likely to progress from systemic inflammatory response syndrome (SIRS) to uroseptic shock after minimally invasive percutaneous nephrolithotomy (MPCNL) for the upper urinary tract stones. We retrospectively reviewed 156 patients who suffered infectious complications after MPCNL from March 2014 to February 2016. Perioperative risk factors that could potentially contribute to uroseptic shock were compared to those of patients with only SIRS. 135 of the 156 patients developed to SIRS only, the remaining 21 patients progressed to uroseptic shock...
February 22, 2017: Urolithiasis
https://www.readbyqxmd.com/read/28229178/the-consummatory-and-motivational-behaviors-for-natural-rewards-following-long-term-withdrawal-from-morphine-no-anhedonia-but-persistent-maladaptive-behaviors-for-high-value-rewards
#14
Yingying Li, Xigeng Zheng, Na Xu, Yue Zhang, Zhengkui Liu, Yunjing Bai
RATIONALE: The negative affective state, e.g., anhedonia, emerges after abstinence from abused drugs may be linked to the motivational processes of drug craving and relapse. Although anhedonia diminishes over time with drug abstinence, it is not yet rather explicit whether anhedonia exists or not following protracted withdrawal. OBJECTIVES: The behavioral responses to natural rewards were examined after 2 to 3 weeks withdrawal from morphine. Male rats were pretreated with either a binge-like morphine paradigm or daily saline injection for 5 days...
February 22, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28229066/a-case-of-influenza-a-h3n2-complicated-by-community-acquired-pneumonia-and-death-in-a-young-healthy-adult-during-the-2013-2014-season
#15
Lauren F Collins, Benjamin D Anderson, Gregory C Gray
With multiple available vaccines and antivirals, seasonal influenza A is typically a self-limited acutely debilitating illness in young healthy adults. Here, we illustrate unexpected morbidity and mortality in a relatively young and healthy patient seen at a large tertiary care academic medical center for seasonal influenza A (H3N2) complicated by community-acquired pneumonia, hypoxic respiratory failure, septic shock, and death.
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28228749/neuroprotective-role-of-the-pi3-kinase-akt-signaling-pathway-in-zebrafish
#16
Shuang Chen, Yunzhang Liu, Xiaozhi Rong, Yun Li, Jianfeng Zhou, Ling Lu
Neuronal survival and growth in the embryo is controlled partly by trophic factors. For most trophic factors (such as Insulin-like growth factor-1), the ability to regulate cell survival has been attributed to the phosphoinositide 3-kinase (PI3K)/Akt kinase cascade. This study presents data illustrating the role of PI3K/Akt in attainment of normal brain size during zebrafish embryogenesis. Blocking PI3K with inhibitor LY294002 caused a significant reduction in brain size (in addition to global growth retardation) during zebrafish embryogenesis...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28228335/alterations-in-cardiac-autonomic-control-in-spinal-cord-injury
#17
Fin Biering-Sørensen, Tor Biering-Sørensen, Nan Liu, Lasse Malmqvist, Jill Maria Wecht, Andrei Krassioukov
A spinal cord injury (SCI) interferes with the autonomic nervous system (ANS). The effect on the cardiovascular system will depend on the extent of damage to the spinal/central component of ANS. The cardiac changes are caused by loss of supraspinal sympathetic control and relatively increased parasympathetic cardiac control. Decreases in sympathetic activity result in heart rate and the arterial blood pressure changes, and may cause arrhythmias, in particular bradycardia, with the risk of cardiac arrest in those with cervical or high thoracic injuries...
February 15, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28228301/shoshin-beriberi-thiamine-responsive-pulmonary-hypertension-in-exclusively-breastfed-infants-a-study-from-northern-india
#18
Javeed Iqbal Bhat, Hilal Ahmad Rather, Ambreen Ali Ahangar, Umar Amin Qureshi, Parvez Dar, Qazi Iqbal Ahmed, Bashir Ahmed Charoo, Syed Wajid Ali
OBJECTIVE: To study the effect of thiamine administration on the resolution of pulmonary hypertension in exclusively breastfed infants. DESIGN: Prospective cohort study. SETTING: Hospital based study of a tertiary care hospital. PATIENTS: A total of 29 infants with 17 males (58.6%) and 12 females (41.4%) were included in the study. INTERVENTION: In addition to the management of shock, right heart failure and renal failure, patients received intravenous thiamine 100mg/kg IV followed by 10mg/day till introduction of supplementary feeds...
January 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28228168/luminescence-spectroscopical-properties-of-plagioclase-particles-from-the-hayabusa-sample-return-mission-an-implication-for-study-of-space-weathering-processes-in-the-asteroid-itokawa
#19
Arnold Gucsik, Tomoki Nakamura, Cornelia Jäger, Kiyotaka Ninagawa, Hirotsugu Nishido, Masahiro Kayama, Akira Tsuchiyama, Ulrich Ott, Ákos Kereszturi
We report a systematic spectroscopical investigation of three plagioclase particles (RB-QD04-0022, RA-QD02-0025-01, and RA-QD02-0025-02) returned by the Hayabusa spacecraft from the asteroid Itokawa, by means of scanning electron microscopy, cathodoluminescence microscopy/spectroscopy, and micro-Raman spectroscopy. The cathodoluminescence properties are used to evaluate the crystallization effects and the degree of space weathering processes, especially the shock-wave history of Itokawa. They provide new insights regarding spectral changes of asteroidal bodies due to space weathering processes...
February 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28228060/resuscitation-with-lyophilized-plasma-is-safe-and-improves-neurologic-recovery-in-a-long-term-survival-model-of-swine-subjected-to-traumatic-brain-injury-hemorrhagic-shock-and-polytrauma
#20
Patrick E Georgoff, Vahagn C Nikolian, Ihab Halaweish, Kiril Chtraklin, Peter J Bruhn, Hassan Eidy, Monica Rasmussen, Yongqing Li, Ashok Srinivasan, Hasan B Alam
We have previously shown that fresh frozen plasma (FFP) and lyophilized plasma decrease brain lesion size and improve neurologic recovery in a swine model of traumatic brain injury (TBI) and hemorrhagic shock (HS). In this study, we examine whether these findings can be validated in a clinically relevant model of severe TBI, HS, and polytrauma. Female Yorkshire swine were subjected to TBI (controlled cortical impact), hemorrhage (40% volume), grade III liver and splenic injuries, rib fracture, and rectus abdominis crush...
February 22, 2017: Journal of Neurotrauma
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