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angiotensin 1-7

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https://www.readbyqxmd.com/read/27913661/effects-of-exendin-4-on-the-intrarenal-renin-angiotensin-system-and-interstitial-fibrosis-in-unilateral-ureteral-obstruction-mice-exendin-4-and-unilateral-ureteral-obstruction
#1
Ying Le, Zongji Zheng, Junyu Xue, Mengling Cheng, Meiping Guan, Yaoming Xue
OBJECTIVE: The objective of this article is to investigate the renoprotecive effects of exendin-4 in a mouse model of unilateral ureteral obstruction (UUO) and explore the putative mechanisms. METHODS: Male Balbc mice underwent sham operation or UUO surgery, and then received intraperitoneal injection of vehicle or exendin-4, respectively. After 14 days, mice were sacrificed and the left kidneys were collected and analyzed by histology, immunohistochemistry, Western blot, quantitative real-time reverse transcription polymerase chain reaction, radioimmunoassay and enzyme-linked immunosorbent assay...
October 2016: Journal of the Renin-angiotensin-aldosterone System: JRAAS
https://www.readbyqxmd.com/read/27904104/the-effects-of-unilateral-nephrectomy-on-blood-pressure-and-its-circadian-rhythm
#2
Naro Ohashi, Shinsuke Isobe, Sayaka Ishigaki, Takahisa Suzuki, Daisuke Motoyama, Takayuki Sugiyama, Masao Nagata, Akihiko Kato, Seiichiro Ozono, Hideo Yasuda
Objective Hypertension and diurnal blood pressure (BP) variation are widely accepted as risk factors for renal damage. However, the effects of unilateral nephrectomy on BP and its circadian rhythm have not yet been clarified in patients with a compromised renal function, including dialysis patients. Methods We investigated 22 unilateral nephrectomized patients (16 men and 6 women, age: 64.5±14.3 years). The function of the circulating renin-angiotensin system (RAS) (plasma renin activity and plasma angiotensin II) and 24-h ambulatory BP monitoring (ABPM) were evaluated before and after nephrectomy...
2016: Internal Medicine
https://www.readbyqxmd.com/read/27900397/noradrenaline-receptor-mechanisms-modulate-the-angiotensin-ii-induced-water-intake-in-the-subfornical-organ-in-rats
#3
Makoto Takahashi, Junichi Tanaka
The present study was carried out to clarify the role of noradrenergic systems in the mediation of drinking response to angiotensin II (ANG II) in the rat subfornical organ (SFO). Microinjection of ANG II (10 pmol, 50 nl) into the SFO caused a robust drinking response (water volume, 1.8-8.7 ml for 20 min). Injections of either noradrenaline (NA; 0.1, 1 and 10 nmols, 50 nl) into the SFO did not produce a significant water intake. Phenylephrine (Phen; 0.1, 1, 10 nmols, 50 nl), an α1-adrenoceptor agonist, injected into the SFO elicited little drinking in the rats tested (water volume, 0...
November 29, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27896943/ang-1-7-protects-cardiomyocytes-against-hg-induced-injuries-through-inhibiting-ros-activated-leptin-p38-mapk-erk1-2-pathways-but-not-leptin-jnk-pathway-in-vitro
#4
Yiyan Lei, Qing Xu, Bo Zeng, Wei Zhang, Yulan Zhen, Yuansheng Zhai, Fei Cheng, Weiyi Mei, Dongdan Zheng, Jianqiang Feng, Jun Lan, Jingfu Chen
AIMS: Angiotensin-(1-7) [Ang-(1-7)], recognized as a new bioactive peptide in renin-angiotensin system (RAS), shows biological and pharmacological properties in diabetic cardiovascular diseases. Leptin induced-p38 MAPK pathway has been reported to contribute to the high glucose (HG)-induced injury. In this study, we demonstrated the mechanism that how Ang-(1-7) can protect from HG-stimulated injuries in H9c2 cells. METHODS: H9c2 cells were treated with 35 mM glucose (HG) for 24 h to establish a model of HG-induced damage...
November 29, 2016: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/27895527/phase-ii-trial-of-angiotensin-1-7-for-the-treatment-of-patients-with-metastatic-sarcoma
#5
Paul D Savage, James Lovato, K Bridget Brosnihan, Antonius A Miller, W Jeffrey Petty
Background. Angiotensin-(1-7) [Ang-(1-7)] is an endogenous antiangiogenic hormone with anticancer activity. In a phase I study of Ang-(1-7), two of three patients with metastatic sarcoma experienced disease stabilization. This phase II study examined clinical and biomarker outcomes for patients with metastatic sarcoma. Methods. Ang-(1-7) was administered by subcutaneous injection at a dose of 20 mg daily. If excessive toxicities occurred in the first cohort, a dose deescalation cohort was allowed. Blood samples were obtained to measure changes in biomarkers...
2016: Sarcoma
https://www.readbyqxmd.com/read/27894250/pathological-interactions-between-the-endothelin-1-and-the-angiotensin-converting-enzyme-among-tunisian-coronary-patients
#6
Abdelkader Chalghoum, Yosri Noichri, Azza Dandana, Bruno Baudin, Abdelhédi Miled, Salima Ferchichi
BACKGROUND: The correct understanding of the biochemical and metabolic interactions between coronary risk factors contribute to the exploration of cardiovascular pathophysiology and improves therapeutic care. The aim of this study was to explore the endothelin-1 (ET-1) concentration and the angiotensin converting enzyme (ACE) activity among Tunisian patients with coronary heart disease, and to investigate the metabolic relationships between these two markers,… and to assess the possible relationship between them and the different risk factors...
November 29, 2016: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/27893331/multidisciplinary-approach-to-novel-therapies-in-cardio-oncology-research-manticore-101-breast-a-randomized-trial-for-the-prevention-of-trastuzumab-associated-cardiotoxicity
#7
Edith Pituskin, John R Mackey, Sheri Koshman, Davinder Jassal, Marshall Pitz, Mark J Haykowsky, Joseph J Pagano, Kelvin Chow, Richard B Thompson, Larissa J Vos, Sunita Ghosh, Gavin Y Oudit, Justin A Ezekowitz, D Ian Paterson
Purpose The primary toxicity of trastuzumab therapy for human epidermal growth factor receptor 2-overexpressing (HER2-positive) breast cancer is dose-independent cardiac dysfunction. Angiotensin-converting enzyme inhibitors and β-blockers are recommended first-line agents for heart failure. We hypothesized that angiotensin-converting enzyme inhibitors and β-blockers could prevent trastuzumab-related cardiotoxicity. Patients and Methods In this double-blinded, placebo-controlled trial, patients with HER2-positive early breast cancer were randomly assigned to receive treatment with perindopril, bisoprolol, or placebo (1:1:1) for the duration of trastuzumab adjuvant therapy...
November 28, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/27893045/association-of-3-different-antihypertensive-medications-with-hip-and-pelvic-fracture-risk-in-older-adults-secondary-analysis-of-a-randomized-clinical-trial
#8
Rachel Puttnam, Barry R Davis, Sara L Pressel, Paul K Whelton, William C Cushman, Gail T Louis, Karen L Margolis, Suzanne Oparil, Jeffrey Williamson, Alokananda Ghosh, Paula T Einhorn, Joshua I Barzilay
Importance: On the basis of observational studies, the use of thiazide diuretics for the treatment of hypertension is associated with reduced fracture risk compared with nonuse. Data from randomized clinical trials are lacking. Objective: To examine whether the use of thiazide diuretics for the treatment of hypertension is associated with reduced fracture risk compared with nonuse. Design, Setting, and Participants: Using Veterans Affairs and Medicare claims data, this study examined hip and pelvic fracture hospitalizations in Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack Trial participants randomized to first-step therapy with a thiazide-type diuretic (chlorthalidone), a calcium channel blocker (amlodipine besylate), or an angiotensin-converting enzyme inhibitor (lisinopril)...
November 21, 2016: JAMA Internal Medicine
https://www.readbyqxmd.com/read/27889958/ace2-and-the-homolog-collectrin-in-the-modulation-of-nitric-oxide-and-oxidative-stress-in-blood-pressure-homeostasis-and-vascular-injury
#9
Guang Yang, Pei-Lun Chu, Lars Christian Rump, Thu H Le, Johannes Stegbauer
SIGNIFICANCE: Hypertension is the leading risk factor causing mortality and morbidity worldwide. Angiotensin (Ang) II, the most active metabolite of the renin-angiotensin (RAS) plays an outstanding role in the pathogenesis of hypertension and vascular injury. Activation of angiotensin converting enzyme2 (ACE2) has shown to attenuate devastating effects of Angiotensin II in the cardiovascular system by reducing Ang II degradation and increasing Ang-(1-7) generation leading to Mas receptor activation...
November 27, 2016: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/27889699/comparison-of-clinical-factors-between-patients-with-angiotensin-converting-enzyme-inhibitor-induced-angioedema-and-cough
#10
Pär Hallberg, Julia Nagy, Malgorzata Karawajczyk, Leif Nordang, Gunilla Islander, Pia Norling, Hans-Erik Johansson, Mary Kämpe, Svante Hugosson, Qun-Ying Yue, Mia Wadelius
BACKGROUND: Angioedema is a rare and serious adverse drug reaction (ADR) to angiotensin-converting enzyme (ACE) inhibitor treatment. Dry cough is a common side effect of ACE inhibitors and has been identified as a possible risk factor for angioedema. OBJECTIVE: We compared characteristics between patients with ACE inhibitor-induced angioedema and cough with the aim of identifying risk factors that differ between these adverse events. METHODS: Data on patients with angioedema or cough induced by ACE inhibitors were collected from the Swedish database of spontaneously reported ADRs or from collaborating clinicians...
November 25, 2016: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/27887857/a-potential-contribution-of-dipeptidyl-peptidase-4-by-the-mediation-of-monocyte-differentiation-in-the-development-and-progression-of-abdominal-aortic-aneurysms
#11
Hsin-Ying Lu, Chun-Yao Huang, Chun-Ming Shih, Yi-Wen Lin, Chein-Sung Tsai, Feng-Yen Lin, Chun-Che Shih
OBJECTIVE: Abdominal aortic aneurysms (AAAs) are characterized by the destruction of elastin and collagen in the media and adventitia. Dipeptidyl peptidase-4 (DPP-4, an adipokine known as CD26) influences cell signaling, cell-matrix interactions, and the regulation of the functional activity of incretins in metabolic and inflammatory disorders. Although the role of DPP-4 in AAA evolution has been demonstrated, the underlying mechanisms of DPP-4-regulated AAA development remains unknown...
November 22, 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27884622/exercise-modulates-the-aortic-renin-angiotensin-system-independently-of-estrogen-therapy-in-ovariectomized-hypertensive-rats
#12
Patrick W Endlich, Erick R G Claudio, Leandro C F Lima, Rogério F Ribeiro Júnior, Antonio A B Peluso, Ivanita Stefanon, Nazaré S Bissoli, Virginia S Lemos, Robson A S Dos Santos, Glaucia R de Abreu
The renin-angiotensin-system is an important component of cardiovascular control and is up-regulated under various conditions, including hypertension and menopause. The aim of this study was to evaluate the effects of swimming training and estrogen therapy (ET) on angiotensin-II (ANG II)-induced vasoconstriction and angiotensin-(1-7) [ANG-(1-7)]-induced vasorelaxation in aortic rings from ovariectomized spontaneously hypertensive rats. Animals were divided into Sham (SH), Ovariectomized (OVX), Ovariectomized treated with E2 (OE2), Ovariectomized plus swimming (OSW) and Ovariectomized treated with E2 plus swimming (OE2+SW) groups...
November 21, 2016: Peptides
https://www.readbyqxmd.com/read/27884223/local-renin-angiotensin-aldosterone-systems-and-cardiovascular-diseases
#13
REVIEW
Walmor C De Mello
The presence of local renin angiotensin aldosterone systems (RAAS) in the cardiovascular and renal tissues and their influence in cardiovascular and renal diseases are described. The fundamental role of ACE/Ang II/AT1 receptor axis activation as well the counterregulatory role of ACE2/Ang (1-7)/Mas receptor activation on cardiovascular and renal physiology and pathology are emphasized. The presence of a local RAS and its influence on hypertension is discussed, and finally, the hypothesis that epigenetic factors change the RAAS in utero and induce the expression of renin or Ang II inside the cells of the cardiovascular system is presented...
January 2017: Medical Clinics of North America
https://www.readbyqxmd.com/read/27884212/angiotensin-converting-enzyme-2-is-reduced-in-alzheimer-s-disease-in-association-with-increasing-amyloid-%C3%AE-and-tau-pathology
#14
Patrick Gavin Kehoe, Steffenny Wong, Noura Al Mulhim, Laura Elyse Palmer, J Scott Miners
BACKGROUND: Hyperactivity of the classical axis of the renin-angiotensin system (RAS), mediated by angiotensin II (Ang II) activation of the angiotensin II type 1 receptor (AT1R), is implicated in the pathogenesis of Alzheimer's disease (AD). Angiotensin-converting enzyme-2 (ACE-2) degrades Ang II to angiotensin 1-7 (Ang (1-7)) and counter-regulates the classical axis of RAS. We have investigated the expression and distribution of ACE-2 in post-mortem human brain tissue in relation to AD pathology and classical RAS axis activity...
November 25, 2016: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/27882566/angiotensin-converting-enzyme-inhibitory-and-antioxidant-peptides-from-digestion-of-larvae-and-pupae-of-asian-weaver-ant-oecophylla-smaragdina-fabucious
#15
Werawich Pattarayingsakul, Arjaree Nilavongse, Onrapak Reamtong, Pamorn Chittavanich, Idsada Mungsantisuk, Yuvadee Mathong, Wipoo Prasitwuttisak, Watanalai Panbangred
BACKGROUND: Mixed larvae and pupae of weaver ant (Oecophylla smaragdina) are widely used as an important food ingredient in regions of Thailand. They have high nutritional values and comprise 53% protein and 13% lipid. Peptides derived from food proteins have been shown to possess biological activities. RESULTS: Peptides derived from pepsin and trypsin digestion of these weaver ant larvae and pupae were purified based on ACE inhibitory and antioxidant activities, and their amino acid sequences identified by LC-MS/MS...
November 23, 2016: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/27880955/long-term-angiotensin-ii-receptor-blockade-limits-hypertension-aortic-dysfunction-and-structural-remodeling-in-a-rat-model-of-chronic-kidney-disease
#16
Omar Z Ameer, Mark Butlin, Elena Kaschina, Manuela Sommerfeld, Alberto P Avolio, Jacqueline K Phillips
BACKGROUND/AIMS: Chronic kidney disease (CKD) is associated with large artery remodeling, endothelial dysfunction and calcification, with angiotensin II (Ang II) a known driver of these pathologies. We investigated long-term Ang II type 1 receptor inhibition with valsartan on aortic function and structure in the Lewis polycystic kidney (LPK) rat model of CKD. METHODS: Mixed sex LPK and Lewis control (total n = 28) treated (valsartan 60 mg/kg/day p.o. from 4 to 18 weeks) and vehicle groups were studied...
November 24, 2016: Journal of Vascular Research
https://www.readbyqxmd.com/read/27872279/role-of-the-receptor-mas-in-macrophage-mediated-inflammation-in-vivo
#17
Anna Hammer, Guang Yang, Juliane Friedrich, Agnes Kovacs, De-Hyung Lee, Katharina Grave, Stefanie Jörg, Natalia Alenina, Janina Grosch, Jürgen Winkler, Ralf Gold, Michael Bader, Arndt Manzel, Lars C Rump, Dominik N Müller, Ralf A Linker, Johannes Stegbauer
Recently, an alternative renin-angiotensin system pathway has been described, which involves binding of angiotensin-(1-7) to its receptor Mas. The Mas axis may counterbalance angiotensin-II-mediated proinflammatory effects, likely by affecting macrophage function. Here we investigate the role of Mas in murine models of autoimmune neuroinflammation and atherosclerosis, which both involve macrophage-driven pathomechanisms. Mas signaling affected macrophage polarization, migration, and macrophage-mediated T-cell activation...
November 21, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27865700/adhesion-ability-of-angiotensin-ii-with-model-membranes
#18
Julia Preu, Louis Tiefenauer, Thomas Gutberlet
The octa-peptide angiotensin II (Ang II, (H2NAspArgValTyrIleHisProPheCOOH)) is one of the key player on blood pressure regulation in mammals. Predominantly binding to the Angiotensin type 1 and 2 receptors, the hormone is one of several peptide ligands binding to G protein coupled receptors (GPCR). The active hormone derives from a high molecular weight precursor sequentially cleaved by the proteases renin and the angiotensin converting enzyme (ACE). The chemical nature of the amino acid sequence has an impact on the behavior in the proximity of membranes, demonstrated using different membrane model systems and biophysical methods...
November 17, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27865641/canadian-cardiovascular-society-guidelines-on-perioperative-cardiac-risk-assessment-and-management-for-patients-who-undergo-noncardiac-surgery
#19
Emmanuelle Duceppe, Joel Parlow, Paul MacDonald, Kristin Lyons, Michael McMullen, Sadeesh Srinathan, Michelle Graham, Vikas Tandon, Kim Styles, Amal Bessissow, Daniel I Sessler, Gregory Bryson, P J Devereaux
The Canadian Cardiovascular Society Guidelines Committee and key Canadian opinion leaders believed there was a need for up to date guidelines that used the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) system of evidence assessment for patients who undergo noncardiac surgery. Strong recommendations included: 1) measuring brain natriuretic peptide (BNP) or N-terminal fragment of proBNP (NT-proBNP) before surgery to enhance perioperative cardiac risk estimation in patients who are 65 years of age or older, are 45-64 years of age with significant cardiovascular disease, or have a Revised Cardiac Risk Index score ≥ 1; 2) against performing preoperative resting echocardiography, coronary computed tomography angiography, exercise or cardiopulmonary exercise testing, or pharmacological stress echocardiography or radionuclide imaging to enhance perioperative cardiac risk estimation; 3) against the initiation or continuation of acetylsalicylic acid for the prevention of perioperative cardiac events, except in patients with a recent coronary artery stent or who will undergo carotid endarterectomy; 4) against α2 agonist or β-blocker initiation within 24 hours before surgery; 5) withholding angiotensin-converting enzyme inhibitor and angiotensin II receptor blocker starting 24 hours before surgery; 6) facilitating smoking cessation before surgery; 7) measuring daily troponin for 48 to 72 hours after surgery in patients with an elevated NT-proBNP/BNP measurement before surgery or if there is no NT-proBNP/BNP measurement before surgery, in those who have a Revised Cardiac Risk Index score ≥1, age 45-64 years with significant cardiovascular disease, or age 65 years or older; and 8) initiating of long-term acetylsalicylic acid and statin therapy in patients who suffer myocardial injury/infarction after surgery...
October 4, 2016: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/27862587/are-non-allergic-drug-reactions-commonly-documented-as-medication-allergies-a-national-cohort-of-veterans-admissions-from-2000-to-2014
#20
Kevin W McConeghy, Aisling R Caffrey, Haley J Morrill, Amal N Trivedi, Kerry L LaPlante
PURPOSE: Adverse drug reactions (ADRs) including medication allergies are not well-described among large national cohorts. This study described the most common documented medication allergies and their reactions among a national cohort of Veterans Affairs (VA) inpatients. METHODS: We evaluated inpatient admissions in any VA Medical Center from 1 January 2000 to 31 December 2014. Each admission was linked with allergy history preceding or upon admission. Individual drugs were aggregated into drug class category including: penicillins, sulfonamides, angiotensin converting enzyme (ACE) inhibitors, opiates, HMG-CoA reductase inhibitors ("statins") and non-steroidal anti-inflammatory inhibitors (NSAID)...
November 13, 2016: Pharmacoepidemiology and Drug Safety
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