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https://www.readbyqxmd.com/read/28550241/acute-effects-of-moderate-altitude-on-biomarkers-of-cardiovascular-inflammation-and-endothelial-function-and-their-differential-modulation-by-dual-endothelin-receptor-blockade
#1
Michael Lichtenauer, Bjoern Goebel, Vera Paar, Bernhard Wernly, Thomas Gecks, Ilonka Rohm, Martin Förster, Stefan Betge, Hans R Figulla, Uta C Hoppe, Malte Kelm, Marcus Franz, Christian Jung
BACKGROUND: Endothelial dysfunction is accompanied by the release of microparticles (MP). OBJECTIVE: We sought to investigate the effect of moderate hypoxia on circulatory levels of microparticles, biomarkers of cardiovascular function and inflammation and on echocardiographic parameters in healthy volunteers staying at an altitude of 2978 m. METHODS: Eighteen healthy volunteers were subjected to moderate hypoxia by staying at 2978 m above sea level for three days...
May 24, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28548649/aqueous-humor-endothelin-1-and-total-retinal-blood-flow-in-patients-with-non-proliferative-diabetic-retinopathy
#2
L-A Khuu, F Tayyari, J M Sivak, J G Flanagan, S Singer, M H Brent, D Huang, O Tan, C Hudson
PurposeThe purpose of this study was to determine the association between aqueous ET-1 levels and total retinal blood flow (TRBF) in patients with non-insulin-dependent type 2 diabetes mellitus (T2DM) and early non-proliferative diabetic retinopathy (NPDR).Patients and methodsA total of 15 age-matched controls and 15 T2DM patients with NPDR were recruited into the study. Aqueous humor (~80-120 μl) was collected before cataract surgery to measure the levels of ET-1 using suspension multiplex array technology...
May 26, 2017: Eye
https://www.readbyqxmd.com/read/28548598/associations-between-endothelin-polymorphisms-and-aneurysmal-subarachnoid-hemorrhage-clinical-vasospasm-delayed-cerebral-ischemia-and-functional-outcome
#3
Christoph J Griessenauer, Robert M Starke, Paul M Foreman, Philipp Hendrix, Mark R Harrigan, Winfield S Fisher, Nilesh A Vyas, Robert H Lipsky, Mingkuan Lin, Beverly C Walters, Jean-Francois Pittet, Mali Mathru
OBJECTIVE Endothelin-1, a potent vasoconstrictor, and its receptors may be involved in the pathogenesis of aneurysmal subarachnoid hemorrhage (aSAH), clinical vasospasm, delayed cerebral ischemia (DCI), and functional outcome following aSAH. In the present study, common endothelin single nucleotide polymorphisms (SNPs) and their relation to aSAH were evaluated. METHODS Blood samples from all patients enrolled in the Cerebral Aneurysm Renin Angiotensin System (CARAS) study were used for genetic evaluation. The CARAS study prospectively enrolled patients with aSAH at 2 academic institutions in the US from 2012 to 2015...
May 26, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28548215/protein-z-and-endothelin-1-genetic-polymorphisms-in-pediatric-egyptian-sickle-cell-disease-patients
#4
Mervat M Khorshied, Nohair S Mohamed, Rania S Hamza, Rasha M Ali, Mona K El-Ghamrawy
BACKGROUND: Sickle cell disease (SCD) is a monogenic disease associated with multisystem morbidity. Vasculopathy caused by delicate imbalance between coagulation and endothelial systems plays a pivotal role in disease course. As Protein Z and Endothelin-1 genetic polymorphisms may increase the thrombotic risk, the aim of the current work was to verify the possible impact of Protein Z (PROZ G79A) and Endothelin-1 (EDN1 G5665T) polymorphisms on the clinic-laboratory features of the SCD in a cohort of Egyptian pediatric patients...
May 26, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28544968/clinical-usefulness-of-videocapillaroscopy-and-selected-endothelial-cell-activation-markers-in-people-with-type-1-diabetes-mellitus-complicated-by-microangiopathy
#5
Anna Kuryliszyn-Moskal, Wieslaw Zarzycki, Artur Dubicki, Diana Moskal, Bozena Kosztyła-Hojna, Anna Hryniewicz
PURPOSE: Microvascular abnormalities are one of the most important causes of persistent diabetic complications. The aim of our study was to compare microvascular changes examined by nailfold videocapillaroscopy (NVC) examination with serum concentrations of vascular endothelial growth factor (VEGF), soluble thrombomodulin (sTM) and endothelin-1 (ET-1) in people with Type 1 diabetes with and without microangiopathy. MATERIAL/METHODS: The study included 106 people with Type 1 diabetes and 40 healthy controls...
May 22, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/28543803/predictive-value-of-inflammatory-factors-on-contrast-induced-acute-kidney-injury-in-patients-who-underwent-an-emergency-percutaneous-coronary-intervention
#6
Ying Yuan, Hong Qiu, Xiaoying Hu, Tong Luo, Xiaojin Gao, Xueyan Zhao, Jun Zhang, Yuan Wu, Shubin Qiao, Yuejin Yang, Runlin Gao
BACKGROUND: Contrast-induced acute kidney injury (CI-AKI) is one of the most serious complications in patients who undergo percutaneous coronary intervention (PCI), especially in those with acute coronary syndrome. It has been shown that inflammation may play an important role in the pathophysiology of CI-AKI. HYPOTHESIS: Inflammatory factors may play a predominant role in the prediction of CI-AKI in patients who undergo emergency PCI. METHODS: Patients who underwent emergency PCI from 2013 to 2015 were consecutively enrolled and were divided into CI-AKI and non-CI-AKI groups...
May 19, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28542479/preliminary-study-of-hypoxia-related-cardiovascular-mediator-markers-in-patients-with-end-stage-renal-disease-with-and-without-diabetes-and-the-effects-of-haemodialysis
#7
A Treweeke, J Hall, S Lambie, S J Leslie, I L Megson, S M MacRury
BACKGROUND: Evidence points to activation of pro-inflammatory and pro-thrombotic stimuli during the haemodialysis process in end-stage renal disease (ESRD) with potential to predispose to cardiovascular events. Diabetes is associated with a higher incidence of cardiovascular disease in haemodialysis patients. We tested the hypothesis that a range of mediators and markers that modulate cardiovascular risk are elevated in haemodialysis patients with diabetes compared to those without. METHODS: Men and women with diabetes (n = 6) and without diabetes (n = 6) aged 18-90 years receiving haemodialysis were recruited...
2017: PloS One
https://www.readbyqxmd.com/read/28542386/correlation-between-plasma-endothelin-1-levels-and-severity-of-septic-liver-failure-quantified-by-maximal-liver-function-capacity-limax-test-a-prospective-study
#8
Magnus F Kaffarnik, Navid Ahmadi, Johan F Lock, Tilo Wuensch, Johann Pratschke, Martin Stockmann, Maciej Malinowski
AIM: To investigate the relationship between the degree of liver dysfunction, quantified by maximal liver function capacity (LiMAx test) and endothelin-1, TNF-α and IL-6 in septic surgical patients. METHODS: 28 septic patients (8 female, 20 male, age range 35-80y) were prospectively investigated on a surgical intensive care unit. Liver function, defined by LiMAx test, and measurements of plasma levels of endothelin-1, TNF-α and IL-6 were carried out within the first 24 hours after onset of septic symptoms, followed by day 2, 5 and 10...
2017: PloS One
https://www.readbyqxmd.com/read/28539637/amygdalar-endothelin-1-regulates-pyramidal-neuron-excitability-and-affects-anxiety
#9
Ming Chen, Huan-Huan Yan, Shu Shu, Lei Pei, Long-Kai Zang, Yu Fu, Ze-Fen Wang, Qi Wan, Lin-Lin Bi
An abnormal neuronal activity in the amygdala is involved in the pathogenesis of anxiety disorders. However, little is known about the mechanisms. High-anxiety mice and low-anxiety mice, representing the innate extremes of anxiety-related behaviors, were first grouped according to their anxiety levels in the elevated plus maze test. We found that the mRNA for endothelin-1 (ET1) and ET1 B-type receptors (ETBRs) in the amygdala was down-regulated in high-anxiety mice compared with low-anxiety mice. Knocking down basolateral amygdala (BLA) ET1 expression enhanced anxiety-like behaviors, whereas over-expressing ETBRs, but not A-type receptors (ETARs), had an anxiolytic effect...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28539568/clinical-and-hemodynamic-effects-of-endothelin-receptor-antagonists-in-patients-with-heart-failure
#10
Bo Xiong, Dan Nie, Yin Cao, Yanke Zou, Yuanqing Yao, Jie Tan, Jun Qian, Shunkang Rong, Chunbin Wang, Jing Huang
The clinical benefit of endothelin receptor antagonists (ERA) for the management of heart failure (HF) remains controversial. To examine this question, we performed a meta-analysis of randomized controlled trials (RCTs) to investigate the clinical and hemodynamic effects of ERA in HF patients.We searched the PubMed, Medline, Embase, and Cochrane Library from inception to March 20, 2016 to identify the pertinent studies. Risk ratio (RR) and weighted mean difference (WMD) were calculated using a fixed or random effect model...
May 23, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28533261/the-superoxide-dismutase-mimetic-tempol-does-not-alleviate-glucocorticoid-mediated-rarefaction-of-rat-skeletal-muscle-capillaries
#11
Erin R Mandel, Emily C Dunford, Ghoncheh Abdifarkosh, Patrick C Turnbull, Christopher G R Perry, Michael C Riddell, Tara L Haas
Sustained elevations in circulating glucocorticoids elicit reductions in skeletal muscle microvascular content, but little is known of the underlying mechanisms. We hypothesized that glucocorticoid-induced oxidative stress contributes to this phenomenon. In rats that were implanted with corticosterone (CORT) or control pellets, CORT caused a significant decrease in muscle glutathione levels and a corresponding increase in protein carbonylation, an irreversible oxidative modification of proteins. Decreased endothelial nitric oxide synthase and increased endothelin-1 mRNA levels were detected after 9 days of CORT, and blood flow to glycolytic muscles was diminished...
May 2017: Physiological Reports
https://www.readbyqxmd.com/read/28532389/the-use-of-macitentan-in-fontan-circulation-a-case-report
#12
Polyvios Demetriades, Amir Aziz, Robin Condliffe, Sarah E Bowater, Paul F Clift
BACKGROUND: The Fontan circulation, a result of a palliative procedure in patients with single systemic ventricles, is defined by chronically elevated pulmonary vascular resistance. When traditional heart failure therapies fail, pharmacological agents that reduce pulmonary artery pressures may be used. These include endothelial-receptor antagonists, prostanoids and phosphodiesterase type 5 inhibitors. We report the first use of macitentan, an endothelin-receptor antagonist, in a patient with a Fontan circulation...
May 22, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28531898/plasma-et-1-concentrations-are-elevated-in-patients-with-hypertension-meta-analysis-of-clinical-studies
#13
Mei Xu, Yong-Ping Lu, Ahmed Abdallah Hasan, Berthold Hocher
BACKGROUND/AIMS: A recent study revealed that global overexpression of ET-1 causes a slight reduction in systemic blood pressure. Moreover, heterozygous ET-1 knockout mice are hypertensive. The role of ET-1 in human hypertension was so far not addressed by a strict meta-analysis of published human clinical studies. METHODS: We included studies published between January 1, 1990 and February 28, 2017. We included case control studies analyzing untreated essential hypertension or hypertensive patients where antihypertensive medication was discontinued for at least two weeks...
May 26, 2017: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/28528914/systemic-sclerosis-dermal-fibroblasts-suppress-th1-cytokine-production-via-galectin-9-overproduction-due-to-fli1-deficiency
#14
Ryosuke Saigusa, Yoshihide Asano, Kouki Nakamura, Megumi Hirabayashi, Shunsuke Miura, Takashi Yamashita, Takashi Taniguchi, Yohei Ichimura, Takehiro Takahashi, Ayumi Yoshizaki, Tomomitsu Miyagaki, Makoto Sugaya, Shinichi Sato
Dermal fibroblasts promote skin-localized transdifferentiation of Tregs to Th2-like cells in systemic sclerosis (SSc). However, the entire effect of SSc dermal fibroblasts on immune cells still remains unknown. Since galectin-9 induces Th2 cytokine-predominant immune imbalance by negatively regulating Th1/Th17 cells in inflammatory diseases, we investigated the contribution of galectin-9 to Th immune balance in SSc lesional skin. We utilized human clinical samples and Fli1(+/-) mice because Fli1 deficiency induces SSc-like phenotypes in various cell types...
May 18, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28526859/evaluation-of-arteriolar-smooth-muscle-cell-function-in-an-ex-vivo-microvascular-network-model
#15
Jessica M Motherwell, Mohammad S Azimi, Kristine Spicer, Natascha G Alves, Nicholas A Hodges, Jerome W Breslin, Prasad V G Katakam, Walter L Murfee
An emerging challenge in tissue engineering biomimetic models is recapitulating the physiological complexity associated with real tissues. Recently, our laboratory introduced the rat mesentery culture model as an ex vivo experimental platform for investigating the multi-cellular dynamics involved in angiogenesis within an intact microvascular network using time-lapse imaging. A critical question remains whether the vessels maintain their functionality. The objective of this study was to determine whether vascular smooth muscle cells in cultured microvascular networks maintain the ability to constrict...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28524914/bioavailability-of-the-ferulic-acid-derived-phenolic-compounds-of-a-rice-bran-enzymatic-extract-and-their-activity-against-superoxide-production
#16
Cristina Perez-Ternero, Alba Macià, Maria Alvarez de Sotomayor, Juan Parrado, Maria-Jose Motilva, Maria-Dolores Herrera
Rice bran is an exceptional source of such antioxidant molecules as γ-oryzanol and ferulic acid, but their bioavailability and metabolism within this matrix remain unknown. The aims of this work were to describe the oral bioavailability and metabolic pathways of the ferulic acid-derived phenolic compounds contained in a rice bran enzymatic extract (RBEE), and to determine its effect on NADPH oxidase activity. Wistar rats were administered with RBEE and sacrificed at different times over a period of 24 h to obtain plasma...
May 19, 2017: Food & Function
https://www.readbyqxmd.com/read/28524738/selexipag-a-selective-prostacyclin-receptor-agonist-in-pulmonary-arterial-hypertension-a-pharmacology-review
#17
Jesús Honorato Pérez
Pulmonary hypertension is defined by a mean pulmonary artery pressure ≥25 mm Hg at rest. Management of pulmonary arterial hypertension (PAH) includes specific drug therapy with calcium channel blockers in vasoreactive patients, or drugs approved for PAH in non-reactive patients that target the endothelin, nitric-oxide and prostacyclin pathways. Areas covered: The review covers receptor selectivity, pharmacokinetics, pharmacodynamics and adverse effects (AEs) of intravenous (IV) epoprostenol (synthetic prostacyclin); the prostacyclin analogs iloprost, beraprost, and treprostinil administered by IV, subcutaneous, inhaled or oral routes; and the oral selective prostacyclin receptor agonist selexipag...
May 19, 2017: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/28520920/methylation-of-human-eukaryotic-elongation-factor-alpha-eef1a-by-a-member-of-a-novel-protein-lysine-methyltransferase-family-modulates-mrna-translation
#18
Magnus E Jakobsson, Jedrzej Malecki, Benedikt S Nilges, Anders Moen, Sebastian A Leidel, Pål Ø Falnes
Many cellular proteins are methylated on lysine residues and this has been most intensively studied for histone proteins. Lysine methylations on non-histone proteins are also frequent, but in most cases the functional significance of the methylation event, as well as the identity of the responsible lysine (K) specific methyltransferase (KMT), remain unknown. Several recently discovered KMTs belong to the so-called seven-β-strand (7BS) class of MTases and we have here investigated an uncharacterized human 7BS MTase currently annotated as part of the endothelin converting enzyme 2, but which should be considered a separate enzyme...
May 18, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28520568/endothelin-a-receptor-antagonists-in-diabetic-kidney-disease
#19
Panagiotis I Georgianos, Rajiv Agarwal
PURPOSE OF REVIEW: Despite optimal therapy of diabetic nephropathy with agents blocking the renin-angiotensin-aldosterone system, the residual risk of nephropathy progression to end-stage renal disease (ESRD) remains high. The purpose of this review is to discuss the potential role of endothelin antagonism as a therapeutic tool to reduce residual proteinuria and delay kidney injury progression among patients with diabetic nephropathy. RECENT FINDINGS: Preclinical studies have shown that endothelin receptor antagonists (ERAs) exert proteinuria lowering and nephroprotective actions in experimental models of diabetic nephropathy...
May 17, 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/28515175/role-for-reactive-oxygen-species-in-flow-stimulated-inner-medullary-collecting-duct-endothelin-1-production
#20
Will Wheatley, Donald E Kohan
Inner medullary collecting duct (IMCD)-derived endothelin-1 (ET-1) is stimulated by volume expansion, in part through augmented luminal flow, whereupon it can elicit natriuresis and diuresis. Since flow can alter nitric oxide (NO) and reactive oxygen species (ROS), both of which can affect collecting duct salt transport, we asked whether NO and/or ROS mediate flow-stimulated IMCD ET-1. Mouse IMCD3 cells were exposed to flow and ET-1/GAPDH mRNA assessed. A shear stress of 10 dyne/cm2 for 1 hr increased ET-1 mRNA by 4-fold compared to no flow (ET-1 flow response)...
May 17, 2017: American Journal of Physiology. Renal Physiology
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