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https://www.readbyqxmd.com/read/29045335/angiotensin-converting-enzyme-2-and-renal-disease
#1
Vanessa R Williams, James W Scholey
PURPOSE OF REVIEW: The renin-angiotensin system (RAS) is a pivotal player in the physiology and pathophysiology of cardiovascular and renal systems. Discovery of angiotensin-converting enzyme 2 (ACE2), capable of cleaving RAS effector peptide angiotensin (Ang) II into biologically active Ang-(1-7), has increased the complexity of our knowledge of the RAS. ACE2 expression is abundant in the kidney and is thought to provide protection against injury. This review emphasizes current experimental and clinical findings that examine ACE2 in the context of kidney injury and its potential therapeutic impact for treatment of kidney disease...
October 16, 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/29028845/analysis-of-cell-cycle-parameters-during-the-transition-from-unhindered-growth-to-ribosomal-and-translational-stress-conditions
#2
Md Shamsuzzaman, Ananth Bommakanti, Aviva Zapinsky, Nusrat Rahman, Clarence Pascual, Lasse Lindahl
Abrogation of ribosome synthesis (ribosomal stress) leads to cell cycle arrest. However, the immediate cell response to cessation of ribosome formation and the transition from normal cell proliferation to cell cycle arrest have not been characterized. Furthermore, there are conflicting conclusions about whether cells are arrested in G2/M or G1, and whether the cause is dismantling ribosomal assembly per se, or the ensuing decreased number of translating ribosomes. To address these questions, we have compared the time kinetics of key cell cycle parameters after inhibiting ribosome formation or function in Saccharomyces cerevisiae...
2017: PloS One
https://www.readbyqxmd.com/read/28992224/modulation-of-leucocytic-angiotensin-converting-enzymes-expression-in-patients-maintained-on-high-permeable-haemodialysis
#3
Bogusz Trojanowicz, Christof Ulrich, Roman Fiedler, Peter Martus, Markus Storr, Torsten Boehler, Kristin Werner, Michael Hulko, Daniel Zickler, Kevin Willy, Ralf Schindler, Matthias Girndt
Background: High mortality of haemodialysis patients is associated with systemic chronic inflammation and overactivation of the renin-angiotensin system (RAS). Insufficient elimination of pro-inflammatory immune mediators, especially in the molecular weight range of 15-45 kDa, may be one of the reasons for this. Employment of haemodialysis membranes with increased permeability was shown to ameliorate the inflammatory response and might modulate the effects of local RAS. In this study, we tested the impact of high cut-off (HCO), medium cut-off (MCO) and high-flux (HF) dialysis on leucocytic transcripts of angiotensin-converting enzymes (ACE and ACE2)...
July 19, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28977802/a-human-long-non-coding-rna-alt1-controls-the-cell-cycle-of-vascular-endothelial-cells-via-ace2-and-cyclin-d1-pathway
#4
Wen Li, Rui Wang, Jie-Yi Ma, Mian Wang, Jin Cui, Wei-Bin Wu, Rui-Ming Liu, Chun-Xiang Zhang, Wen Li, Shen-Ming Wang
BACKGROUND/AIMS: ALT1 is a novel long non-coding RNA derived from the alternatively spliced transcript of the deleted in lymphocytic leukemia 2 (DLEU2). To date, ALT1 biological roles in human vascular endothelial cells have not been reported. METHODS: ALT1 was knocked down by siRNAs. Cell proliferation was analyzed by cck-8. The existence and sequence of human ALT1 were identified by 3' rapid amplification of cDNA ends. The interaction between lncRNA and proteins was analyzed by RNA-Protein pull down assay, RNA immunoprecipitation, and mass spectrometry analysis...
October 5, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28970203/activation-pattern-of-ace2-ang-1-7-and-ace-ang-ii-pathway-in-course-of-heart-failure-assessed-by-multiparametric-mri-in-vivo-in-tg%C3%AE-q-44-mice
#5
Urszula Tyrankiewicz, Mariola Olkowicz, Tomasz Skorka, Magdalena Jablonska, Anna Orzyłowska, Anna Bar, MichaL Gonet, Piotr Berkowicz, Krzysztof Jasinski, Jerzy A Zoladz, Ryszard T Smolenski, Stefan Chlopicki
Here we analyzed systemic (plasma) and local (heart/aorta) changes in ACE/ACE-2 balance in Tgαq*44 mice in course of heart failure (HF). Tgαq*44 mice with cardiomyocyte specific Gαq overexpression and late onset of HF were analyzed at different age for angiotensin pattern in plasma, heart and aorta using liquid chromatography/mass spectrometry, for progression of HF by in vivo magnetic resonance imaging under isoflurane anesthesia and for exercise capacity by voluntary wheel running. Six-month-old Tgαq*44 mice displayed decreased ventricle radial strains and impaired left atrial function...
September 28, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28944898/effects-of-iqp-vep-and-spirulina%C3%A2-platensis-hydrolysates-on-the-local-kidney-renin-angiotensin-system-in-spontaneously-hypertensive-rats
#6
Jiahui Zheng, Jingyue Wang, Huanglei Pan, Hongli Wu, Difeng Ren, Jun Lu
The aim of the present study was to investigate the antihypertensive effects of the bioactive Spirulina platensis peptides Ile‑Gln‑Pro (IQP), Val‑Glu‑Pro (VEP), as well as Spirulina platensis hydrolysates (SH), and assessed whether the synthesis of components of the myocardial and renal local renin angiotensin system (RAS) are regulated differentially in spontaneously hypertensive rats (SHR). The SHR were administrated with IQP, VEP and SH respectively (10 mg/kg/day) for 6 weeks and received continuous monitoring of blood pressure (BP) for two more weeks...
September 25, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28944831/vitamin-d-alleviates-lipopolysaccharide%C3%A2-induced-acute-lung-injury-via-regulation-of-the-renin%C3%A2-angiotensin-system
#7
Jun Xu, Jialai Yang, Jian Chen, Qingli Luo, Qiu Zhang, Hong Zhang
Acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) are the clinical manifestations of severe lung damage and respiratory failure. ALI and ARDS result are associated with high mortality in patients. At present, no effective treatments for ALI and ARDS exist. It is established that vitamin D exhibits anti‑inflammatory effects, however, the specific effect of vitamin D on ALI remains largely unknown. The aim of the present study was to investigate whether, and by which mechanism, vitamin D alleviates lipopolysaccharide (LPS)‑induced ALI...
November 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28935757/resveratrol-inhibits-growth-of-experimental-abdominal-aortic-aneurysm-associated-with-upregulation-of-angiotensin-converting-enzyme-2
#8
Corey S Moran, Erik Biros, Smriti M Krishna, Yutang Wang, Chris Tikellis, Joseph V Moxon, Mark E Cooper, Paul E Norman, Louise M Burrell, Merlin C Thomas, Jonathan Golledge
OBJECTIVE: Recent evidence suggests an important role for angiotensin-converting enzyme 2 (ACE2) in limiting abdominal aortic aneurysm (AAA). This study examined the effect of ACE2 deficiency on AAA development and the efficacy of resveratrol to upregulate ACE2 in experimental AAA. APPROACH AND RESULTS: Ace2 deletion in apolipoprotein-deficient mice (ApoE(-/)(-)Ace2(-/y) ) resulted in increased aortic diameter and spontaneous aneurysm of the suprarenal aorta associated with increased expression of inflammation and proteolytic enzyme markers...
September 21, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28935640/attenuation-of-pulmonary-ace2-activity-impairs-inactivation-of-des-arg9-bradykinin-bkb1r-axis-and-facilitates-lps-induced-neutrophil-infiltration
#9
Chhinder P Sodhi, Christine Wohlford-Lenane, Yukihiro Yamaguchi, Thomas Prindle, William B Fulton, Sanxia Wang, Paul B McCray, Mark C Chappell, David J Hackam, Hongpeng Jia
Angiotensin converting enzyme 2 (ACE2) is a terminal carboxypeptidase with important functions in the renin angiotensin system and plays a critical role in inflammatory lung diseases. ACE2 cleaves single terminal residues from several bioactive peptides such as angiotensin II. However, few of its substrates in the respiratory tract have been identified and the mechanism underlying the role of ACE2 in inflammatory lung disease has not been fully characterized. In an effort to identify biological targets of ACE2 in the lung, we tested its effects on des-arg9 bradykinin (DABK) in airway epithelial cells based upon a hypothesis that DABK is a biological substrate of ACE2 in the lung and ACE2 plays an important role in the pathogenesis of acute lung inflammation partly through modulating DABK/BKB1R axis signaling...
September 21, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28929450/intrarenal-angiotensin-converting-enzyme-the-old-and-the-new
#10
REVIEW
Silas Culver, Caixia Li, Helmy M Siragy
PURPOSE OF REVIEW: The intrarenal renin-angiotensin-aldosterone system (RAS) is an independent paracrine hormonal system with an increasingly prominent role in hypertension and renal disease. Two enzyme components of this system are angiotensin-converting enzyme (ACE) and more recently discovered ACE2. The purpose of this review is to describe recent discoveries regarding the roles of intrarenal ACE and ACE2 and their interaction. RECENT FINDINGS: Renal tubular ACE contributes to salt-sensitive hypertension...
September 19, 2017: Current Hypertension Reports
https://www.readbyqxmd.com/read/28915321/regulation-and-functions-of-the-renin-angiotensin-system-in-white-and-brown-adipose-tissue
#11
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/28915252/expression-and-regulation-of-the-neutral-amino-acid-transporter-b0at1-in-rat-small-intestine
#12
Julia Jando, Simone M R Camargo, Brigitte Herzog, François Verrey
Absorption of neutral amino acids across the luminal membrane of intestinal enterocytes is mediated by the broad neutral amino acid transporter B0AT1 (SLC6A19). Its intestinal expression depends on co-expression of the membrane-anchored peptidase angiotensin converting enzyme 2 (ACE2) and is additionally enhanced by aminopeptidase N (CD13). We investigated in this study the expression of B0AT1 and its auxiliary peptidases as well as its transport function along the rat small intestine. Additionally, we tested its possible short- and long-term regulation by dietary proteins and amino acids...
2017: PloS One
https://www.readbyqxmd.com/read/28895159/relationship-between-genetic-variants-of-ace2-gene-and-circulating-levels-of-ace2-and-its-metabolites
#13
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
#14
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/28888034/blunting-of-estrogen-modulation-of-cardiac-cellular-chymase-ras-activity-and-function-in-shr
#15
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/28877748/a-pilot-clinical-trial-of-recombinant-human-angiotensin-converting-enzyme-2-in-acute-respiratory-distress-syndrome
#16
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/28845018/loss-of-angiotensin-converting-enzyme-ii-ace2-accelerates-the-development-of-liver-injury-induced-by-thioacetamide
#17
Hsi-Tien Wu, Ya-Wen Chuang, Cheng-Pu Huang, Ming-Huang Chang
Angiotensin converting enzyme II (ACE2), an angiotensin converting enzyme (ACE) homologue that displays antagonist effects on ACE/angiotensin II (Ang II) axis in renin-angiotensin system (RAS), could play a protective role against liver damages. The purpose of this study is to investigate whether inflammation-mediated liver injury could be affected by ACE2 derived pathways in the RAS. Eight-weeks-old wild-type (WT; C57BL/6) and Ace2 KO (hemizygous Ace2(-/y)) male mice were used to induce liver fibrosis by thioacetamide (TAA) administration (0, 100, and 200 mg/kg BW)...
August 25, 2017: Experimental Animals
https://www.readbyqxmd.com/read/28833476/angiotensin-converting-enzyme-2-angiotensin-1-7-1-9-system-novel-promising-targets-for-heart-failure-treatment
#18
REVIEW
Naim Kittana
Cardiac remodeling (cardiac hypertrophy and fibrosis) is a hall mark of heart failure (HF). It can be induced by the abnormal elevation of several endogenous factors including angiotensin II (Ang II), which is generated from its precursor angiotensin I (Ang I) by the action of angiotensin converting enzyme (ACE). The inhibition of this enzyme or the blockade of the Ang II receptors demonstrated a high clinical value against the progression of HF. Ang I and Ang II may also be converted into angiotensin 1-7 (Ang 1-7) and angiotensin 1-9 (Ang 1-9) respectively by the action of angiotensin converting enzyme-2 (ACE2)...
August 21, 2017: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/28822808/bml-111-equilibrated-ace-angii-at1r-and-ace2-ang-1-7-mas-axis-to-protect-hepatic-fibrosis-in-rats
#19
Quandong Hu, Zhenzhen Hu, Qiongfeng Chen, Yonghong Huang, Zi Mao, Fangyun Xu, Xiaoyan Zhou
BACKGROUND: It was recently reported Lipoxins (LXs) had protective effects on fibrous diseases, and renin-angiotensin-aldosterone system (RAAS) had played vital and bidirectional roles in hepatic fibrosis. In this paper, a hepatic fibrosis model, induced by carbon tetrachloride (CCL4) in rats, was used to observe the relations between RAAS and LXs, as well as to further explore the alternative anti-fibrosis mechanisms of LXs. METHODS: The model was evaluated by morphological observations and biochemical assays...
August 16, 2017: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/28820061/renin-angiotensin-system-and-cytokines-in-chronic-kidney-disease-clinical-and-experimental-evidence
#20
Ariadna Andrade Saldanha da Silva, Thiago Ruiz Prestes, Amanda Oliveira Lauar, Beranardo Bahia Finotti, Ana Cristina Simões e Silva
Chronic kidney disease (CKD) has become a major public health problem in Brazil and worldwide. There are many causes of CKD, being the congenital anomalies of the kidney and urinary tract and the glomerular diseases very common in pediatric patients, while diabetic nephropathy, CKD due to chronic arterial hypertension and glomerular diseases are predominant in adult patients. Many endogenous mediators have been related to the pathophysiology of CKD, being relevant the effects of the renin-angiotensin system (RAS) and the immune-inflammatory mediators including cytokines...
August 18, 2017: Protein and Peptide Letters
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