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https://www.readbyqxmd.com/read/28441692/physiological-role-of-endothelin-1-in-flow-mediated-vasodilatation-in-humans-and-impact-of-cardiovascular-risk-factors
#1
Jérémy Bellien, Michèle Iacob, Christelle Monteil, Isabelle Rémy-Jouet, Clothilde Roche, Thomas Duflot, Cathy Vendeville, Laurence Gutierrez, Christian Thuillez, Vincent Richard, Robinson Joannidès
OBJECTIVES: The current study addressed the hypothesis that the local decrease in endothelin-1 (ET-1) bioavailability during sustained flow increases contributes to endothelium-dependent, flow-mediated dilatation (FMD) of conduit arteries and is altered in presence of cardiovascular risk factors. METHODS AND RESULTS: In nine young healthy individuals, the decrease in local ET-1 plasma levels and radial artery FMD in response to hand skin heating (from 34 to 44 °C) was not affected by endothelin type A (ETA) receptor blockade, achieved using the brachial infusion of BQ-123 (100 nmol/min per l of forearm), as compared with physiological saline (0...
June 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28438762/etb-receptor-contribution-to-vascular-dysfunction-in-postmenopausal-women
#2
Megan M Wenner, Kelly N Sebzda, Andrew V Kuczmarski, Ryan T Pohlig, David G Edwards
Endothelin-1 (ET-1) contributes to age-related endothelial dysfunction in men via the ETA receptor. However, there are sex differences in the ET-1 system, and ETB receptors are modulated by sex hormones. The purpose of this study was to test the hypothesis that ETB receptors contribute to impaired vasodilatory function in postmenopausal women (PMW). We measured flow-mediated dilation (FMD) using ultrasound, and cutaneous nitric oxide-mediated vasodilation during local heating (42°C) via laser Doppler flowmetry in 18 young (YW; 22±1 years) and 16 PMW (56±1 years)...
April 24, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28429342/assessment-of-serum-endothelin-1-levels-in-rat-appendicitis-model-and-the-effects-of-bosentan
#3
S B Sarsu, K Sahin, H Kilincaslan, S L Mirapoglu, N Buyukpınarbasili, M E Duz, I Aydogdu
OBJECTIVE: In this study, the diagnostic value of serum endothelin-1 (ET-1) levels and the therapeutic effects of bosentan have been investigated in an experimental appendicitis rat model. MATERIALS AND METHODS: Twenty-one male Sprague-Dawley rats were chosen for the study. The rats were allocated into three groups as follows: Group 1 (control, n = 7), Group 2 (appendicitis, n = 7), and Group 3 (bosentan treatment, n = 7). At the 6th hour of the experiment, Groups 1 and 2 received 2 ml saline, and group 3 received 30 mg/kg bosentan intraperitoneally...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28414743/the-et-1-mediated-carbonylation-and-degradation-of-anxa1-induce-inflammatory-phenotype-and-proliferation-of-pulmonary-artery-smooth-muscle-cells-in-hps
#4
Jing He, Bin Yi, Yang Chen, Qing Huang, Huan Wang, Kaizhi Lu, Weiling Fu
Hepatopulmonary syndrome (HPS) is a serious complication of advanced liver disease, which markedly increases mortality. Pulmonary vascular remodelling (PVR) induced by circulating mediators plays an important role in the pathogenesis of HPS, while the underlying mechanism remains undefined. In the present study, we reported that endothelin-1 (ET-1) is up-regulated and annexin A1(ANXA1) is down-regulated in HPS rat, and ET-1 decreases the ANXA1 expression in a dose-dependent manner in rat pulmonary arterial smooth muscle cells (PASMCs)...
2017: PloS One
https://www.readbyqxmd.com/read/28413991/potential-role-of-endothelin-in-early-vascular-aging
#5
Michelle Trindade, Wille Oigman, Mario Fritsch Neves
Early vascular aging is a process associated with gradual alterations in the vessels, regarding to their structure and function, taking a more rapid course than normal biological aging in the arteries. In the presence of cardiovascular disease, these age-associated alterations are accelerated, contributing for the appearance or the progression of cardiovascular disease, such as high blood pressure, dyslipidemia, smoking and diabetes. Endothelin-1 (ET-1) is the most abundant and important endothelin produced by vascular cells...
April 14, 2017: Current Hypertension Reviews
https://www.readbyqxmd.com/read/28413519/amp-activated-protein-kinase-mediates-the-effects-of-lipoprotein-associated-phospholipase-a2-on-endothelial-dysfunction-in-atherosclerosis
#6
Li Yang, Hong-Liang Cong, Shu-Feng Wang, Ting Liu
The present study aimed to investigate the effects of lipoprotein-associated phospholipase A2 (Lp-PLA2) on endothelial dysfunction in an in vitro cell model of atherosclerosis, and to determine whether AMP-activated protein kinase (AMPK) mediates the effects of Lp-PLA2 on endothelial dysfunction. A total of 392 patients with coronary artery disease (CAD), including various sub-conditions, were recruited, and the plasma concentrations of Lp-PLA2 were evaluated. In addition, an in vitro model of atherosclerosis was established by exposing human umbilical vein endothelial cells (HUVECs) to oxidized low-density lipoprotein (oxLDL)...
April 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28412414/endothelin-1-promotes-hypertrophic-remodelling-of-cardiac-myocytes-by-activating-sustained-signalling-and-transcription-downstream-of-endothelin-type-a-receptors
#7
Caroline R Archer, Emma L Robinson, Faye M Drawnel, H Llewelyn Roderick
G-protein coupled receptor (GPCR) mediated activation of the MAPK signalling cascade is a key pathway in the induction of hypertrophic remodelling of the heart - a response to pathological cues including hypertension and myocardial infarction. While levels of pro-hypertrophic hormone agonists of GPCRs increase during periods of greater workload to enhance cardiac output, hypertrophy does not necessarily result. Here we investigated the relationship between the duration of exposure to the pro-hypertrophic GPCR agonist endothelin-1 (ET-1) and the induction of hypertrophic remodelling in neonatal rat ventricular myocytes (NRVM) and in the adult rat heart in vivo...
April 13, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28409476/the-effects-of-hyperoxia-on-microvascular-endothelial-cell-proliferation-and-production-of-vaso-active-substances
#8
Ilias Attaye, Yvo M Smulders, Monique C de Waard, Heleen M Oudemans-van Straaten, Bob Smit, Michiel H Van Wijhe, Rene J Musters, Pieter Koolwijk, Angelique M E Spoelstra-de Man
BACKGROUND: Hyperoxia, an arterial oxygen pressure of more than 100 mmHg or 13% O2, frequently occurs in hospitalized patients due to administration of supplemental oxygen. Increasing evidence suggests that hyperoxia induces vasoconstriction in the systemic (micro)circulation, potentially affecting organ perfusion. This study addresses effects of hyperoxia on viability, proliferative capacity, and on pathways affecting vascular tone in cultured human microvascular endothelial cells (hMVEC)...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28409007/subclinical-sleep-apnoea-and-plasma-levels-of-endothelin-1-among-young-and-healthy-adults
#9
Tobias Schoen, Stefanie Aeschbacher, Joerg D Leuppi, David Miedinger, Ursina Werthmüller, Joel Estis, John Todd, Martin Risch, Lorenz Risch, David Conen
OBJECTIVE: Obstructive sleep apnoea (OSA) is a risk factor for vascular disease and other adverse outcomes. These associations may be at least partly due to early endothelin-1 (ET-1)-mediated endothelial dysfunction (ED). Therefore, we assessed the relationships between subclinical sleep apnoea and plasma levels of ET-1. METHODS: We performed a population-based study among 1255 young and healthy adults aged 25-41 years. Cardiovascular disease, diabetes or a body mass index >35 kg/m(2) were exclusion criteria...
2017: Open Heart
https://www.readbyqxmd.com/read/28401480/target-mediated-drug-disposition-pharmacokinetic-pharmacodynamic-model-of-bosentan-and-endothelin-1
#10
Anke-Katrin Volz, Andreas Krause, Walter Emil Haefeli, Jasper Dingemanse, Thorsten Lehr
BACKGROUND AND OBJECTIVES: Bosentan is a competitive antagonist on endothelin receptor A and B (ETA and ETB), displacing the endogenous binding partner endothelin-1 (ET-1) from its binding sites. After administration of escalating single doses of 10-750 mg as an intravenous (i.v.) infusion, bosentan showed dose-dependent pharmacokinetics (PK). The aim of this analysis was to develop a PK model of bosentan after i.v. administration including competitive antagonism with ET-1 and to analyze its influence on blood pressure and heart rate with a combined pharmacokinetic/pharmacodynamic (PK/PD) model...
April 11, 2017: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28398455/systematic-evaluation-of-endothelin-1-measurement-relative-to-traditional-and-modern-biomarkers-for-clinical-assessment-and-prognosis-in-patients-with-chronic-systolic-heart-failure-serial-measurement-and-multimarker-testing
#11
Hanna K Gaggin, Quynh A Truong, Parul U Gandhi, Shweta R Motiwala, Arianna M Belcher, Rory B Weiner, Aaron L Baggish, James L Januzzi
Objectives: To define the role of single or serial measurement of endothelin 1 (ET-1) for prognostication beyond traditional and modern markers of risk in heart failure (HF). Methods: In total, 115 patients with chronic systolic HF were followed for 10 months. Clinical assessment and ET-1, N-terminal pro-B-type natriuretic peptide (NT-proBNP), highly sensitive troponin I (hsTnI), soluble ST2 (sST2), and galectin 3 were measured at each visit. Results: Elevated ET-1 was associated with worse HF, lower right ventricular function, higher pulmonary pressure, and higher left atrial volume index despite similar left ventricular function...
April 7, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28397441/the-influence-of-the-atrial-fibrillation-episode-duration-on-the-endothelial-function-in-patients-treated-with-pulmonary-veins-isolation
#12
Michał Peller, Piotr Lodziński, Krzysztof Ozierański, Agata Tymińska, Paweł Balsam, Katarzyna Kajurek, Marek Kiliszek, Edward Koźluk, Grzegorz Opolski
BACKGROUND: Atrial fibrillation (AF) is associated with endothelial dysfunctions. OBJECTIVES: The aim of the study was to assess the influence of the duration of an AF episode on the endothelial function. MATERIAL AND METHODS: The study included 65 patients with persistent AF qualified for the percutaneous pulmonary veins isolation. Patients were divided into three subgroups with increasing time of the duration of AF episode, as follow: ≤ 7 months (n = 24 patients), from 7 to 14 months (n = 18 patients) and ≥ 14 months (n = 23 patients)...
January 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28393780/does-sleep-quality-affects-the-immediate-clinical-outcome-in-patients-undergoing-coronary-artery-bypass-grafting-a-clinico-biochemical-correlation
#13
Minati Choudhury, Anushree Gupta, Milind P Hote, Poonam Malhotra Kapoor, Sandeep Khanna, M V Kalaivani, Usha Kiran
OBJECTIVE: Poor sleep quality is emerging as high prevalence among the patients suffering from cardiometabolic disturbances. The vascular polypeptide endothelin 1 (ET-1) is involved in many of the health disorders. However, its potential involvement in patients having poor sleep quality along with cardiovascular problem is limited. The present study was formulated to conduct a prospective analysis of the relationship between ET-1 and in hospital outcome in sleep disorder patients undergoing routine coronary artery bypass grafting (CABG)...
April 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28393188/a-heptameric-peptide-purified-from-spirulina%C3%A2-sp-gastrointestinal-hydrolysate-inhibits-angiotensin-i-converting-enzyme-and-angiotensin%C3%A2-ii-induced-vascular-dysfunction-in-human-endothelial-cells
#14
Seong-Yeong Heo, Seok-Chun Ko, Chang Su Kim, Gun-Woo Oh, Bomi Ryu, Zhong-Ji Qian, Geunhyung Kim, Won Sun Park, Il-Whan Choi, Thi Tuong Vy Phan, Soo-Jin Heo, Do-Hyung Kang, Myunggi Yi, Won-Kyo Jung
In this study, a marine microalga Spirulina sp.-derived protein was hydrolyzed using gastrointestinal enzymes to produce an angiotensin I (Ang I)-converting enzyme (ACE) inhibitory peptide. Following consecutive purification, the potent ACE inhibitory peptide was composed of 7 amino acids, Thr-Met‑Glu‑Pro‑Gly‑Lys-Pro (molecular weight, 759 Da). Analysis using the Lineweaver-Burk plot and molecular modeling suggested that the purified peptide acted as a mixed non-competitive inhibitor of ACE...
April 4, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28389907/targeted-next-generation-sequencing-identified-novel-mutations-in-triple-negative-myeloproliferative-neoplasms
#15
Yu-Cheng Chang, Huan-Chau Lin, Yi-Hao Chiang, Caleb Gon-Shen Chen, Ling Huang, Wei-Ting Wang, Chun-Chia Cheng, Johnson Lin, Yi-Fang Chang, Ming-Chih Chang, Ruey-Kuen Hsieh, Shu-Jen Chen, Ken-Hong Lim, Yuan-Yeh Kuo
Mutations in JAK2, MPL and CALR genes have been identified in the majority of myeloproliferative neoplasm (MPN) patients, and patients negative for these three mutations are the so-called triple-negative (TN) MPN. In this study, we examined the mutational profiles of 16 triple-negative MPN patients including 7 essential thrombocythemia (ET), 1 primary myelofibrosis and 8 polycythemia vera (PV). Targeted next-generation sequencing was performed using the ACTOnco Comprehensive Cancer Panel (Ion AmpliSeq Comprehensive Cancer Panel, Life Technologies) to target all coding exons of 409 cancer-related genes...
May 2017: Medical Oncology
https://www.readbyqxmd.com/read/28386238/time-course-of-endothelial-dysfunction-induced-by-decompression-bubbles-in-rats
#16
Kun Zhang, Mengmeng Wang, Haowen Wang, Yinuo Liu, Peter Buzzacott, Weigang Xu
Decompression stress can cause endothelial injury, leading to systematic inflammation and prothrombotic phenomena. Our previous work found that endothelial injury following decompression correlated positively with bubble formation. This study aimed to investigate the time course of endothelial injury and the relationship with bubble amounts. Rats were subjected to a simulated air dive to 7 ATA for 90 min with rapid decompression. Bubbles were detected ultrasonically at the root of pulmonary arteries following decompression...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28383719/phosphine-resistance-in-cryptolestes-ferrugineus-coleoptera-laemophloeidae-collected-from-grain-storage-facilities-in-oklahoma-usa
#17
C E Konemann, Z Hubhachen, G P Opit, S Gautam, N S Bajracharya
Phosphine gas (PH3) is one of the most commonly used fumigants for controlling stored-grain pests worldwide. We estimated the discriminating dose for Cryptolestes ferrugineus (Stephens) (Coleoptera: Laemophloeidae) adult insects using a laboratory susceptible strain. This discriminating dose was then used to determine presence or absence of PH3 resistance (resistance frequencies) in 19 field-collected populations of C. ferrugineus from Oklahoma, United States. The discriminating dose was estimated as 56.2 ppm of PH3 over a 20-h exposure period at 25 °C...
April 5, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28378733/-prognostic-factors-in-patients-with-non-st-segment-elevation-acute-coronary-syndrome-concurrent-with-type-2-diabetes-mellitus-according-to-the-results-of-the-registry
#18
A P Golikov, S A Berns, R I Stryuk, E A Shmidt, A A Golikova, O L Barbarash
AIM: To investigate factors that influence annual prognosis in patients with non-ST-segment elevation acute coronary syndrome ((NSTEACS) concurrent with type 2 diabetes mellitus (DM2). SUBJECTS AND METHODS: The registry of patients with NSTEACS (non-ST-segment elevation myocardial infarction (NSTEMI), unstable angina) included 415 patients, of them 335 had no carbohydrate metabolic disorders, 80 had DM2. The follow-up period, during which the prognosis was evaluated in the patients, was one year after hospital discharge following the index NSTEACS event...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28376392/multi-targeted-protection-of-acetaminophen-induced-hepatotoxicity-in-mice-by-tannic-acid
#19
Jianping Zhang, Qiongtao Song, Xue Han, Yuanyuan Zhang, Ying Zhang, Xuan Zhang, Xi Chu, Fenghua Zhang, Li Chu
Tannic acid (TA) is the polyphenol that has beneficial health effects against oxidative stress. However, the hepatoprotective effects of TA are still relatively unknown. In the present study, we evaluated the effects of TA on an acetaminophen (APAP)-induced hepatotoxicity model, which was established by administration of 400mg/kg of APAP. The levels of alanine transferase (ALT), aspartate transferase (AST), dendothelin-1 (ET-1), nitric oxide (NO) and malondialdehyde (MDA) in the APAP-induced hepatotoxicity mice were significantly increased (up to ~200%), while their levels were reduced by pretreatment with TA (25 and 50mg/kg) (P<0...
April 1, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28362714/iloprost-prostaglandin-e1-and-papaverine-relax-human-mesenteric-arteries-with-similar-potency
#20
Christoph Mahlke, Jens-Peter Kühn, Birger Mensel, André Schreiber, Annett Juretzko, Antje Steinbach, Olaf Grisk
OBJECTIVE: Non-occlusive mesenteric ischemia (NOMI) is accompanied by mesenteric artery spasms that are at least in part due to endothelin system activation. Acute treatment includes intra-arterial infusion of vasodilators such as iloprost, prostaglandin E1 (PGE1) and papaverine. Their effectiveness is not well characterized in human mesenteric arteries. We directly compared their potency to relax isolated human mesenteric arteries. To explore the potential of Rock inhibition to treat mesenteric artery spasms, we tested if endothelin-1 (ET-1)-induced mesenteric artery constrictions depend rho kinase (Rock)...
March 30, 2017: Shock
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