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https://www.readbyqxmd.com/read/29777691/improving-electrical-properties-of-ipsc-cardiomyocytes-by-enhancing-cx43-expression
#1
Valentin Sottas, Carl-Mattheis Wahl, Mihnea C Trache, Michael Bartolf-Kopp, Sidney Cambridge, Markus Hecker, Nina D Ullrich
The therapeutic potential of induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) is limited by immature functional features including low impulse propagation and reduced cell excitability. Key players regulating electrical activity are voltage-gated Na+ channels (Nav 1.5) and gap junctions built from connexin-43 (Cx43). Here we tested the hypothesis that enhanced Cx43 expression increases intercellular coupling and influences excitability by modulating Nav 1.5. Using transgenic approaches, Cx43 and Nav 1...
May 16, 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29777410/startling-differences-using-the-acoustic-startle-response-to-study-sex-differences-and-neurosteroids-in-affective-disorders
#2
REVIEW
Liisa Hantsoo, Carla E M Golden, Sara Kornfield, Christian Grillon, C Neill Epperson
PURPOSE OF REVIEW: Neuroactive steroid hormones, such as estradiol and progesterone, likely play a role in the pathophysiology of female-specific psychiatric disorders such as premenstrual dysphoric disorder (PMDD) and postpartum depression and may contribute to the marked sex differences observed in the incidence and presentation of affective disorders. However, few tools are available to study the precise contributions of these neuroactive steroids (NSs). In this review, we propose that the acoustic startle response (ASR), an objective measure of an organism's response to an emotional context or stressor, is sensitive to NSs...
May 18, 2018: Current Psychiatry Reports
https://www.readbyqxmd.com/read/29776555/sudden-coronary-death-in-the-young-evidence-of-contractile-phenotype-of-smooth-muscle-cells-in-the-culprit-atherosclerotic-plaque
#3
Stefania Rizzo, Matteo Coen, Antonija Sakic, Monica De Gaspari, Gaetano Thiene, Giulio Gabbiani, Cristina Basso, Marie-Luce Bochaton-Piallat
BACKGROUND: Culprit coronary atherosclerotic plaques (APs) from young sudden cardiac death (SCD) victims are mostly non-atheromatous, i.e., consisting of proliferative smooth muscle cells (SMCs). Coronary vasospasm has been advocated to explain plaque instability in the absence of thrombosis. Our aim was to characterize the SMC phenotype in the intima and media of coronary arteries from young SCD victims. METHODS AND RESULTS: A total of 38 coronary artery segments were studied: (a) 18 APs from young (≤40 years old) SCD patients, (b) 9 APs from old (>40 years old) SCD patients, (c) 11 non-atherosclerotic coronary arteries from young patients (≤40 years old)...
August 1, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29775939/biodegradation-in-seawater-of-pah-and-alkylphenols-from-produced-water-of-a-north-sea-platform
#4
Synnøve Lofthus, Inger K Almås, Peter Evans, Oliver Pelz, Odd Gunnar Brakstad
Operational planned discharges of produced water (PW) to the marine environment from offshore oil production installations, contain low concentrations of dispersed oil compounds, like polycyclic aromatic hydrocarbons (PAHs) and alkylated phenols (APs). Biotransformation in natural seawater (SW) of naphthalenes/PAHs and phenol/APs in field-collected PW from a North Sea platform was investigated in this biodegradation study. The PW was diluted in SW from a Norwegian fjord, and the biodegradation study was performed in slowly rotating carousels at 13 °C over a period of 62 days...
May 4, 2018: Chemosphere
https://www.readbyqxmd.com/read/29773183/cytosolic-increased-labile-zn-2-contributes-to-arrhythmogenic-action-potentials-in-left-ventricular-cardiomyocytes-through-protein-thiol-oxidation-and-cellular-atp-depletion
#5
Sinan Degirmenci, Yusuf Olgar, Aysegul Durak, Erkan Tuncay, Belma Turan
Intracellular labile (free) Zn2+ -level ([Zn2+ ]i ) is low and increases markedly under pathophysiological conditions in cardiomyocytes. High [Zn2+ ]i is associated with alterations in excitability and ionic-conductances while exact mechanisms are not clarified yet. Therefore, we examined the elevated-[Zn2+ ]i on some sarcolemmal ionic-mechanisms, which can mediate cardiomyocyte dysfunction. High-[Zn2+ ]i induced significant changes in action potential (AP) parameters, including depolarization in resting membrane-potential and prolongations in AP-repolarizing phases...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29772915/a-comparison-of-the-antifouling-performance-of-air-plasma-spray-aps-ceramic-and-high-velocity-oxygen-fuel-hvof-coatings-for-use-in-marine-hydraulic-applications
#6
Richard Piola, Andrew S M Ang, Matthew Leigh, Scott A Wade
Maritime hydraulic components are often exposed to harsh environmental conditions which can lead to accelerated deterioration, reduced function, equipment failure and costly repair. Two leading causes of maritime hydraulic failure are biofouling accumulation and corrosion. This study examined the antifouling performance of three candidate replacement high velocity oxygen fuel (HVOF) coatings relative to the performance of the current baseline air plasma spray (APS) ceramic coating for protection of hydraulic actuators...
May 18, 2018: Biofouling
https://www.readbyqxmd.com/read/29770151/research-on-establishment-of-abnormal-phlegmatic-syndrome-with-premature-ovarian-failure-rat-model-and-effects-of-balgham-munziq-treatment
#7
Muladili Yuemaier, Mayire Tuerhong, Abulizi Keremu, Nafeisha Kadeer, Ayiguzhali Aimaiti, Xilinguli Wushouer, Adilijiang Yiming, Xiamixinuer Yilike
This study aimed to establish and explore the biological basis of abnormal phlegmatic syndrome with premature ovarian failure (POF) model in rats based on the Uighur medicine (UM) in the first place and investigate the effects of unique herbal medicine, Balgham Munziq (BMq). Mature female Wistar rats were fed with spinach and coriander in cold and humid condition for approximately 20 weeks until abnormal phlegmatic syndrome (APS) model was established. When APS model was confirmed by Uighur medical experts, APS with POF disease rats were subdivided into APS with POF disease model group and APS with POF disease treated with BMq group; the rest of them were subdivided into APS model group and APS treated with BMq group...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29768970/neurologic-manifestations-of-antiphospholipid-syndrome
#8
I F Ricarte, L A Dutra, F F Abrantes, F F Toso, O G P Barsottini, G S Silva, A W S de Souza, D Andrade
Neurological involvement in antiphospholipid antibody syndrome (APS) is common, and its occurrence increases morbidity and mortality. Patients may present variable neurological involvement, such as cerebrovascular disease, cognitive dysfunction, headache, seizures, movement disorders, multiple sclerosis-like syndrome, transverse myelitis and ocular symptoms. Most neurological manifestations are associated with thrombosis of the microcirculation or of large vessels; nonetheless, there is compelling evidence suggesting that, in some cases, symptoms are secondary to an immune-mediated pathogenesis, with direct binding of aPL on neurons and glia...
January 1, 2018: Lupus
https://www.readbyqxmd.com/read/29768842/self-assembly-of-au-nanoparticles-and-quantum-dots-by-functional-sol-gel-silica-layers
#9
Simin Lu, Meng Li, Debao Liu, Yuntao Yang, Ping Yang
A layer-by-layer (LbL) self-assembled method has been developed to create the nano architectonics consisted of quantum dots (QDs) including hydrophobic CdSe/CdZnS and hydrophilic CdTe and Au nanoparticles (NPs) through a functional silica layer as a linker on a slide glass. The glass layer was created by the hydrolysis of 3-aminopropyltrimethoxysilane (APS), in which the amino group in APS plays an important role for the connection among QDs and Au NPs. UV-vis and PL spectroscopy, scanning electron microscopy, and transmission electron microscopy were employed to characterize...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29768038/use-and-characteristics-of-antipsychotic-methylphenidate-combination-therapy-in-children-and-adolescents-with-a-diagnosis-of-attention-deficit-hyperactivity-disorder
#10
Oliver Scholle, Tobias Banaschewski, Dirk Enders, Edeltraut Garbe, Oliver Riedel
OBJECTIVE: Children and adolescents with attention-deficit/hyperactivity disorder (ADHD) frequently have comorbidities that are potential indications for antipsychotics (APs). Some studies have suggested that the combined use of methylphenidate (MPH) and APs is increasing in this population group. Longitudinal analyses and in-depth investigations on the substance level are lacking. This study aimed to estimate the cumulative proportion of concomitant AP/MPH use in children and adolescents with ADHD over a follow-up of up to 9 years and to describe patient characteristics stratified by specific AP drug...
May 16, 2018: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/29767567/impact-of-ntrk2-drd2-and-ace-polymorphisms-on-prolactin-levels-in-antipsychotic-treated-patients-with-first-episode-psychosis
#11
Patricia Gassó, Sergi Mas, Miquel Bioque, Bibiana Cabrera, Antonio Lobo, Ana González-Pinto, Covadonga M Díaz-Caneja, Iluminada Corripio, Eduard Vieta, Josefina Castro-Fornieles, Salvador Sarró, Anna Mané, Julio Sanjuan, Adrián Llerena, Amalia Lafuente, Jerónimo Saiz-Ruiz, Miguel Bernardo
BACKGROUND: Hyperprolactinemia is a common side-effect of antipsychotics (APs), which may trigger serious secondary problems and compromise the adherence to treatment which is crucial for prognosis, especially in patients presenting with a first-episode of psychosis (FEP). AIMS: We evaluated, in some cases for the first time, the effect of polymorphisms in multiple candidate genes on serum prolactin (PRL) levels in an AP-treated FEP cohort recruited in the multicenter PEPs study (Phenotype - genotype and environmental interaction; Application of a predictive model in first psychotic episodes)...
May 1, 2018: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/29767138/effects-of-essential-oils-on-performance-egg-quality-nutrient-digestibility-and-yolk-fatty-acid-profile-in-laying-hens
#12
Xuemei Ding, Yang Yu, Zhuowei Su, Keying Zhang
The study was conducted to investigate the effect of essential oils on performance, egg quality, nutrient digestibility and yolk fatty acid profile in laying hens. A total of 960 Lohmann laying hens aged 53 weeks were enrolled, under 4 different treatment diets supplemented with 0, 50, 100 and 150 mg/kg essential oils (Enviva EO, Dupont Nutrition Biosciences ApS, Denmark), respectively. Each treatment was replicated 8 times with 30 birds each. Birds were fed dietary treatment diets for 12 weeks (54 to 65 weeks)...
June 2017: Animal nutrition
https://www.readbyqxmd.com/read/29766600/effect-of-childhood-adversities-on-alcohol-problems-is-mainly-mediated-by-depression
#13
Raimo K R Salokangas, Tiina From, Sinikka Luutonen, Henri R W Salokangas, Jarmo Hietala
BACKGROUND AND OBJECTIVES: We aimed to study how five childhood adversities and trauma (CAT) core domains: emotional abuse (EmoAb), physical abuse (PhyAb), sexual abuse (SexAb), emotional neglect (EmoNeg), physical neglect (PhyNeg), associate with alcohol problems (APs), and whether there are any gender differences in these associations. METHODS: Altogether, 690 adult participants drawn from the general population completed a mailed questionnaire, including the trauma and distress scale, as an indicator of CAT, and questions concerning sociodemographic background, depressive symptoms, and APs...
May 15, 2018: American Journal on Addictions
https://www.readbyqxmd.com/read/29765084/hepatoprotective-effects-of-auricularia-cornea-var-li-polysaccharides-against-the-alcoholic-liver-diseases-through-different-metabolic-pathways
#14
Xiuxiu Wang, Yufei Lan, Yongfa Zhu, Shangshang Li, Min Liu, Xinling Song, Huajie Zhao, Weiru Liu, Jianjun Zhang, Shouxian Wang, Le Jia
The present work was designed to evaluate the antioxidation and hepatoprotective effects of Auricularia cornea var. Li. polysaccharides (APS) and enzymatic-extractable APS (EAPS) on the acute alcohol-induced alcoholic liver diseases (ALD). The in vitro antioxidant activities demonstrated that both APS and EAPS had strong reducing power and potential effects on scavenging reactive oxygen species. The in vivo mice experiments showed that the pretreatment with APS or EAPS showed potential hepatoprotective effects on the ALD possibly by increasing the antioxidant activities, reducing the lipid peroxidation, improving the alcohol metabolism, inhibiting the expression levels of inflammatory mediators and preventing the alcohol-induced histopathological alterations...
May 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29759621/analyses-of-the-mode-of-termination-during-diagnostic-ventricular-pacing-to-differentiate-the-mechanisms-of-supraventricular-tachycardias
#15
Mitsunori Maruyama, Shunsuke Uetake, Yasushi Miyauchi, Yoshihiko Seino, Wataru Shimizu
OBJECTIVES: The goal of this study was to determine the diagnostic yield of analyzing the mode of termination during ventricular overdrive pacing (VOP) to differentiate the mechanisms of supraventricular tachycardias (SVTs). BACKGROUND: The majority of the diagnostic criteria for VOP rely on successful entrainment, but termination of SVTs is common during VOP. METHODS: We studied 225 SVTs with a 1:1 atrioventricular relationship, including 34 atrial tachycardias, 67 orthodromic reciprocating tachycardias (ORTs) (including 4 ORTs using accessory pathways [APs] with decremental properties), and 124 atrioventricular nodal re-entrant tachycardias...
November 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29757439/risk-of-thrombosis-with-anti-phospholipid-syndrome-in-systemic-lupus-erythematosus-treated-with-thrombopoietin-receptor-agonists
#16
Zelie Guitton, Louis Terriou, Jean-Christophe Lega, Raphaele Nove-Josserand, Miguel Hie, Zahir Amoura, James B Bussel, Mohamed Hamidou, Eric Rosenthal, Bertrand Lioger, Dominique Chauveau, Axel Chaminade, Nadine Magy-Bertrand, Marc Michel, Sylvain Audia, Bertrand Godeau, Matthieu Mahevas
Objectives: The use of thrombopoietin-receptor agonists (TPO-RAs) has increased as a second-line therapy in ITP, but the efficacy and safety of such drugs has not been evaluated in SLE-associated ITP. Methods: This was a multicentre retrospective cohort study from 2009 to 2016. Participating centres (n = 11) were secondary- or tertiary-care hospitals belonging to the French national network for adult ITP. Results: We included 18 patients with SLE-ITP treated with TPO-RAs; 10 (55%) had aPL, 5 (27%) showing definite APS...
May 10, 2018: Rheumatology
https://www.readbyqxmd.com/read/29756583/4d-qsar-studies-using-a-new-descriptor-of-the-klopman-index-antibacterial-activities-of-sulfone-derivatives-containing-1-3-4-oxadiazole-moiety-based-on-mcet-model
#17
Yahya Guzel, Ertugrul Aslan, Burcin Turkmenoglu, E Mesut Su
In this paper, we have introduced a new atomic descriptor with Klopman index to determine the local reactive sites of the molecular systems during electrophilic, nucleophilic attacks. This index, similar to other local reactivity descriptors but more advanced, has been used as a realistic descriptor to discover new aspects of molecular structure. Nonlinear least squares (NLLS) methods to define the parameters maximizing the fit between the observed points and the computed simulation results were performed according to the Levenberg-Marquardt (LM) algorithm...
May 13, 2018: Current Computer-aided Drug Design
https://www.readbyqxmd.com/read/29755633/coronary-artery-thromboses-stent-thrombosis-and-antiphospholipid-antibody-syndrome-case-report
#18
Augusto Ferreira Correia, Dinaldo Cavalcanti Oliveira, Marcio Sanctos
The antiphospholipid antibody syndrome (APS) is defined by a state of hypercoagulability secondary to an autoimmune disorder. There are evidences that approximately 2.8-5.5% of cases of acute myocardial infarction (AMI) in young individuals are secondary to APS. In this case report, three coronary artery thromboses occurring within a short period are described. Initially, there was an ST-segment elevation (STEMI) in the presence of coronary artery disease (CAD), with the vessel being treated with stent implantation...
April 2018: Cardiology Research
https://www.readbyqxmd.com/read/29755341/plasma-biomarkers-differentiate-parkinson-s-disease-from-atypical-parkinsonism-syndromes
#19
Chin-Hsien Lin, Shieh-Yueh Yang, Herng-Er Horng, Che-Chuan Yang, Jen-Jie Chieh, Hsin-Hsien Chen, Bing-Hsien Liu, Ming-Jang Chiu
Objective: Parkinson's disease (PD) has significant clinical overlaps with atypical parkinsonism syndromes (APS), which have a poorer treatment response and a more aggressive course than PD. We aimed to identify plasma biomarkers to differentiate PD from APS. Methods: Plasma samples ( n = 204) were obtained from healthy controls and from patients with PD, dementia with Lewy bodies (DLB), multiple system atrophy, progressive supranuclear palsy (PSP), corticobasal degeneration (CBD), or frontotemporal dementia (FTD) with parkinsonism (FTD-P) or without parkinsonism...
2018: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29755321/voltage-gated-calcium-channel-activation-by-backpropagating-action-potentials-downregulates-nmdar-function
#20
Anne-Kathrin Theis, Balázs Rózsa, Gergely Katona, Dietmar Schmitz, Friedrich W Johenning
The majority of excitatory synapses are located on dendritic spines of cortical glutamatergic neurons. In spines, compartmentalized Ca2+ signals transduce electrical activity into specific long-term biochemical and structural changes. Action potentials (APs) propagate back into the dendritic tree and activate voltage gated Ca2+ channels (VGCCs). For spines, this global mode of spine Ca2+ signaling is a direct biochemical feedback of suprathreshold neuronal activity. We previously demonstrated that backpropagating action potentials (bAPs) result in long-term enhancement of spine VGCCs...
2018: Frontiers in Cellular Neuroscience
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