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angiotensin 1-7

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https://www.readbyqxmd.com/read/28933985/acn-1-a-c-elegans-homologue-of-ace-genetically-interacts-with-the-let-7-microrna-and-other-heterochronic-genes
#1
Chanatip Metheetrairut, Yuri Ahuja, Frank J Slack
The heterochronic pathway in C. elegans controls the relative timing of cell fate decisions during post-embryonic development. It includes a network of microRNAs (miRNAs), such as let-7, and protein-coding genes, such as the stemness factors, LIN-28 and LIN-41. Here we identified the acn-1 gene, a homologue of mammalian angiotensin-converting enzyme (ACE), as a new suppressor of the stem cell developmental defects of let-7 mutants. Since acn-1 null mutants die during early larval development, we used RNAi to characterize the role of acn-1 in C...
September 21, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28930715/cigarette-smoking-attenuates-kidney-protection-by-angiotensin-converting-enzyme-inhibition-in-nondiabetic-chronic-kidney-disease
#2
Bethany Roehm, Jan Simoni, Jessica Pruszynski, Donald E Wesson
BACKGROUND: Cigarette smoking exacerbates the estimated glomerular filtration rate (eGFR) decline in nondiabetic chronic kidney disease (CKD) despite the kidney protection that is achieved by angiotensin converting enzyme inhibition (ACEI). Whether smoking cessation restores ACEI-related kidney protection is not known. METHODS: This 5-year, prospective, prevention trial recruited 108 smokers and 108 nonsmokers with stage-2 nondiabetic CKD with primary hypertension and urine albumin-to-creatinine ratio (Ualb) >200 mg/g...
September 21, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28928410/ang-1-7-is-an-endogenous-%C3%AE-arrestin-biased-agonist-of-the-at1-receptor-with-protective-action-in-cardiac-hypertrophy
#3
Larissa B Teixeira, Lucas T Parreiras-E-Silva, Thiago Bruder-Nascimento, Diego A Duarte, Sarah C Simões, Rafael M Costa, Deisy Y Rodríguez, Pedro A B Ferreira, Carlos A A Silva, Emiliana P Abrao, Eduardo B Oliveira, Michel Bouvier, Rita C Tostes, Claudio M Costa-Neto
The renin-angiotensin system (RAS) plays a key role in the control of vasoconstriction as well as sodium and fluid retention mediated mainly by angiotensin (Ang) II acting at the AT1 receptor (AT1R). Ang-(1-7) is another RAS peptide, identified as the endogenous ligand of the Mas receptor and known to counterbalance many of the deleterious effects of AngII. AT1R signaling triggered by β-arrestin-biased agonists has been associated to cardioprotection. Because position 8 in AngII is important for G protein activation, we hypothesized that Ang-(1-7) could be an endogenous β-arrestin-biased agonist of the AT1R...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28919716/palatability-and-physical-properties-of-potassium-binding-resin-rdx7675-comparison-with-sodium-polystyrene-sulfonate
#4
Vanessa Zann, John McDermott, Jeffrey W Jacobs, James P Davidson, Fangling Lin, Paul Korner, Robert C Blanks, David P Rosenbaum
BACKGROUND: Hyperkalemia is a potentially life-threatening condition that patients with heart failure or chronic kidney disease, especially those taking renin-angiotensin-aldosterone system inhibitors, are at high risk of developing. Sodium polystyrene sulfonate (SPS), a current treatment, binds potassium within the gastrointestinal tract to reduce potassium absorption. However, poor palatability limits its long-term use. RDX7675, a novel potassium binder in development for the treatment of hyperkalemia, is a calcium salt of a reengineered polystyrene sulfonate-based resin designed to have enhanced palatability...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28915321/regulation-and-functions-of-the-renin-angiotensin-system-in-white-and-brown-adipose-tissue
#5
Mandana Pahlavani, Nishan S Kalupahana, Latha Ramalingam, Naima Moustaid-Moussa
The renin angiotensin system (RAS) is a major regulator of blood pressure, fluid, and electrolyte homeostasis. RAS precursor angiotensinogen (Agt) is cleaved into angiotensin I (Ang I) and II (Ang II) by renin and angiotensin converting enzyme (ACE), respectively. Major effects of Ang II, the main bioactive peptide of this system, is mediated by G protein coupled receptors, Angiotensin Type 1 (AGTR1, AT1R) and Type 2 (AGTR2, AT2R) receptors. Further, the discovery of additional RAS peptides such as Ang 1-7 generated by the action of another enzyme ACE2 identified novel functions of this complex system...
September 12, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28913755/management-and-clinical-outcome-of-stable-coronary-artery-disease-in-austria-results-from-5%C3%A2-years-of-the-clarify-registry
#6
Irene M Lang, Roza Badr-Eslam, Nicola Greenlaw, Robin Young, Philippe Gabriel Steg
BACKGROUND: The population of patients with established coronary artery disease (CAD) is growing because of an improvement in outcomes and survival from acute disease episodes. Nevertheless, these patients remain at high risk of cardiovascular events. Thus, CAD management is important in prevention of disease progression. The objective of this analysis was to describe disease management and clinical outcome of Austrian outpatients with stable CAD over 5 years by using data from the international CLARIFY registry...
September 14, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28905359/guideline-recommended-medications-and-physical-function-in-older-adults-with-multiple-chronic-conditions
#7
Gail McAvay, Heather G Allore, Andrew B Cohen, Danijela Gnjidic, Terrence E Murphy, Mary E Tinetti
BACKGROUND/OBJECTIVES: The benefit or harm of a single medication recommended for one specific condition can be difficult to determine in individuals with multiple chronic conditions and polypharmacy. There is limited information on the associations between guideline-recommended medications and physical function in older adults with multiple chronic conditions. The objective of this study was to estimate the beneficial or harmful associations between guideline-recommended medications and decline in physical function in older adults with multiple chronic conditions...
September 14, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28904234/fibrin-clot-permeability-as-a-predictor-of-stroke-and-bleeding-in-anticoagulated-patients-with-atrial-fibrillation
#8
Leszek Drabik, Paweł Wołkow, Anetta Undas
BACKGROUND AND PURPOSE: Formation of denser fiber networks has been reported in atrial fibrillation and ischemic stroke. In this longitudinal cohort study, we evaluated whether fibrin clot density may predict thromboembolic and bleeding risk in patients with atrial fibrillation on vitamin K antagonists. METHODS: In 236 patients with atrial fibrillation receiving vitamin K antagonists treatment, we measured ex vivo plasma clot permeability (Ks), a measure of the pore size in fibrin networks...
September 13, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28901725/alamandine-reverses-hyperhomocysteinemia-induced-vascular-dysfunction-via-pka-dependent-mechanisms
#9
Tawar Qaradakhi, Minos Timotheos Matsoukas, Alan Hayes, Emma Rybalka, Martin Caprnda, Kvetoslava Rimarova, Milan Sepsi, Dietrich Büsselberg, Peter Kruzliak, John Matsoukas, Vasso Apostolopoulos, Anthony Zulli
INTRODUCTION: Hyperhomocysteinemia (HHcy) impairs nitric oxide endothelium-dependent vasodilation, consequently leading to atherosclerosis, a risk factor for cardiovascular disease. Novel treatments for HHcy are necessary. AIM: We tested the hypothesis that alamandine, a vasoactive peptide of the renin-angiotensin system (RAS), could reverse HHcy-induced vascular dysfunction through the MrgD receptor, and that this is mediated by the protein kinase A (PKA) pathway...
September 13, 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/28895159/relationship-between-genetic-variants-of-ace2-gene-and-circulating-levels-of-ace2-and-its-metabolites
#10
Y Y Chen, P Zhang, X M Zhou, D Liu, J C Zhong, C J Zhang, L J Jin, H M Yu
WHAT IS KNOWN: Angiotensin-converting enzyme 2 (ACE2) plays an important role in the development of essential hypertension (EH). Genetic factors remarkably influence circulating ACE2 level. OBJECTIVE: Because heritability had remarkable effects on circulating ACE2, we designed this study to shed light on whether circulating levels of ACE2, angiotensin-(1-7) and angiotensin-(1-9) were linked to single nucleotide polymorphisms (SNPs) and haplotypes in ACE2 gene. METHODS: A total of 213 patients with newly diagnosed mild to moderate EH were enrolled in the present study...
September 11, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28893641/high-intensity-interval-training-has-beneficial-effects-on-cardiac-remodeling-through-local-renin-angiotensin-system-modulation-in-mice-fed-high-fat-or-high-fructose-diets
#11
Guilherme de Oliveira Sá, Vívian Dos Santos Neves, Shyrlei R de Oliveira Fraga, Vanessa Souza-Mello, Sandra Barbosa-da-Silva
AIMS: HIIT (high-intensity interval training) has the potential to reduce cardiometabolic risk factors, but the effects on cardiac remodeling and local RAS (renin-angiotensin system) in mice fed high-fat or high-fructose diets still need to be fully addressed. MAIN METHODS: Sixty male C57BL/6 mice (12weeks old) were randomly divided into three groups, control (C), High-fat (HF), or High-fructose diet (HRU) and were monitored for eight weeks before being submitted to the HIIT...
September 8, 2017: Life Sciences
https://www.readbyqxmd.com/read/28889965/losartan-counteracts-the-effects-of-cardiomyocyte-swelling-on-glucose-uptake-and-insulin-receptor-substrate-1-levels
#12
Yamil Gerena, Janice Griselle Lozada, Bryan Jael Collazo, Jarold Méndez-Álvarez, Jennifer Méndez-Estrada, Walmor C De Mello
A growing body of evidence demonstrates an association between Angiotensin II (Ang II) receptor blockers (ARBs) and enhanced glucose metabolism during ischemic heart disease. Despite these encouraging results, the mechanisms responsible for these effects during ischemia remain poorly understood. In this study we investigated the influence of losartan, an AT1 receptor blocker, and secreted Ang II (sAng II) on glucose uptake and insulin receptor substrate (IRS-1) levels during cardiomyocyte swelling. H9c2 cells were differentiated to cardiac muscle and the levels of myogenin, Myosin Light Chain (MLC), and membrane AT1 receptors were measured using flow cytometry...
September 7, 2017: Peptides
https://www.readbyqxmd.com/read/28889964/hypotensive-effect-induced-by-microinjection-of-alamandine-a-derivative-of-angiotensin-1-7-into-caudal-ventrolateral-medulla-of-2k1c-hypertensive-rats
#13
E R Soares, C M Barbosa, M J Campagnole-Santos, R A S Santos, A C Alzamora
In the present study we evaluated the cardiovascular effects produced by microinjection of the new component of the renin-angiotensin system, alamandine, into caudal ventrolateral medulla of urethane-anesthetized normotensive and hypertensive 2K1C rats. The participation of different angiotensin receptors in the effects of alamandine was also evaluated. Microinjection of angiotensin-(1-7) was used for comparison. The microinjection of 4, 40 and 140pmol of alamandine or angiotensin-(1-7) into caudal ventrolateral medulla induced similar hypotensive effects in Sham-operated rats...
September 8, 2017: Peptides
https://www.readbyqxmd.com/read/28888034/blunting-of-estrogen-modulation-of-cardiac-cellular-chymase-ras-activity-and-function-in-shr
#14
Sarfaraz Ahmad, Xuming Sun, Marina Lin, Jasmina Varagic, Gisele Zapata-Sudo, Carlos M Ferrario, Leanne Groban, Hao Wang
The relatively low efficacy of ACE-inhibitors in the treatment of heart failure in women after estrogen loss may be due to their inability to reach the intracellular sites at which angiotensin (Ang) II is generated and/or the existence of cell-specific mechanisms in which ACE is not the essential processing pathway for Ang II formation. We compared the metabolic pathway for Ang II formation in freshly isolated myocytes (CMs) and non-myocytes (NCMs) in cardiac membranes extracted from hearts of gonadal-intact and ovariectomized (OVX) adult WKY and SHR rats...
September 9, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28878301/epa-dha-6-1-prevents-angiotensin-ii-induced-hypertension-and-endothelial-dysfunction-in-rats-role-of-nadph-oxidase-and-cox-derived-oxidative-stress
#15
Zahid Rasul Niazi, Grazielle C Silva, Thais Porto Ribeiro, Antonio J León-González, Mohamad Kassem, Abdur Mirajkar, Azhar Alvi, Malak Abbas, Faraj Zgheel, Valérie B Schini-Kerth, Cyril Auger
Eicosapentaenoic acid:docosahexaenoic acid (EPA:DHA) 6:1, an omega-3 polyunsaturated fatty acid formulation, has been shown to induce a sustained formation of endothelial nitric oxide (NO) synthase-derived NO, a major vasoprotective factor. This study examined whether chronic intake of EPA:DHA 6:1 prevents hypertension and endothelial dysfunction induced by angiotensin II (Ang II) in rats. Male Wister rats received orally corn oil or EPA:DHA 6:1 (500 mg kg(-1) per day) before chronic infusion of Ang II (0...
September 7, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28877926/effectiveness-of-quality-improvement-strategies-for-the-management-of-ckd-a-meta-analysis
#16
Samuel A Silver, Chaim M Bell, Glenn M Chertow, Prakesh S Shah, Kaveh Shojania, Ron Wald, Ziv Harel
BACKGROUND AND OBJECTIVES: Quality improvement interventions have enhanced care for other chronic illnesses, but their effectiveness for patients with CKD is unknown. We sought to determine the effects of quality improvement strategies on clinical outcomes in adult patients with nondialysis-requiring CKD. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: We conducted a systematic review of randomized trials, searching Medline and the Cochrane Effective Practice and Organization of Care database from January of 2003 to April of 2015...
September 6, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28877748/a-pilot-clinical-trial-of-recombinant-human-angiotensin-converting-enzyme-2-in-acute-respiratory-distress-syndrome
#17
Akram Khan, Cody Benthin, Brian Zeno, Timothy E Albertson, John Boyd, Jason D Christie, Richard Hall, Germain Poirier, Juan J Ronco, Mark Tidswell, Kelly Hardes, William M Powley, Tracey J Wright, Sarah K Siederer, David A Fairman, David A Lipson, Andrew I Bayliffe, Aili L Lazaar
BACKGROUND: Renin-angiotensin system (RAS) signaling and angiotensin-converting enzyme 2 (ACE2) have been implicated in the pathogenesis of acute respiratory distress syndrome (ARDS). We postulated that repleting ACE2 using GSK2586881, a recombinant form of human angiotensin-converting enzyme 2 (rhACE2), could attenuate acute lung injury. METHODS: We conducted a two-part phase II trial comprising an open-label intrapatient dose escalation and a randomized, double-blind, placebo-controlled phase in ten intensive care units in North America...
September 7, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28877652/angiotensin-1-7-attenuates-atrial-tachycardia-induced-sympathetic-nerve-remodeling
#18
Wenfeng Shangguan, Wen Shi, Guangping Li, Yuanyuan Wang, Jian Li, Xuewen Wang
INTRODUCTION: The effect of Angiotensin-(1-7) (Ang-(1-7)) on atrial autonomic remodeling is still unknown. We hypothesized that Ang-(1-7) could inhibit sympathetic nerve remodeling in a canine model of chronic atrial tachycardia. MATERIALS AND METHODS: Eighteen dogs were randomly assigned to sham group, pacing group and Ang-(1-7) group. Rapid atrial pacing was maintained for 14 days in the pacing and Ang-(1-7) groups. Ang-(1-7) was administered intravenously in the Ang-(1-7) group...
July 2017: Journal of the Renin-angiotensin-aldosterone System: JRAAS
https://www.readbyqxmd.com/read/28875746/plasma-renin-activity-in-patients-with-heart-failure-and-reduced-ejection-fraction-on-optimal-medical-therapy
#19
Petra Nijst, Frederik H Verbrugge, Pieter Martens, Philippe B Bertrand, Matthias Dupont, Gary S Francis, Wh Wilson Tang, Wilfried Mullens
BACKGROUND: Renin-angiotensin-aldosterone system (RAAS) activation in heart failure with reduced ejection fraction (HFREF) is detrimental through promotion of ventricular remodeling and salt and water retention. AIMS: The aims of this article are to describe RAAS activity in distinct HFREF populations and to assess its prognostic impact. METHODS: Venous blood samples were prospectively obtained in 76 healthy volunteers, 72 patients hospitalized for acute decompensated HFREF, and 78 ambulatory chronic HFREF patients without clinical signs of congestion...
July 2017: Journal of the Renin-angiotensin-aldosterone System: JRAAS
https://www.readbyqxmd.com/read/28874464/mas1-receptor-trafficking-involves-erk1-2-activation-through-a-%C3%AE-arrestin2-dependent-pathway
#20
Flavia M Cerniello, Oscar A Carretero, Nadia A Longo Carbajosa, Bruno D Cerrato, Robson A Santos, Hernán E Grecco, Mariela M Gironacci
The MAS1 receptor (R) exerts protective effects in the brain, heart, vessels, and kidney. R trafficking plays a critical function in signal termination and propagation and in R resensitization. We examined MAS1R internalization and trafficking on agonist stimulation and the role of β-arrestin2 in the activation of ERK1/2 (extracellular signal-regulated kinase 1/2) and Akt after MAS1R stimulation. Human embryonic kidney 293T cells were transfected with the coding sequence for MAS1R-YFP (MAS1R fused to yellow fluorescent protein)...
September 5, 2017: Hypertension
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