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angiotensin 1-7

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https://www.readbyqxmd.com/read/28548598/associations-between-endothelin-polymorphisms-and-aneurysmal-subarachnoid-hemorrhage-clinical-vasospasm-delayed-cerebral-ischemia-and-functional-outcome
#1
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/28541811/future-drug-discovery-in-renin-angiotensin-aldosterone-system-intervention
#2
Maria Tamargo, Juan Tamargo
Renin-angiotensin- aldosterone system inhibitors (RAASIs), including angiotensin-converting enzyme inhibitors, angiotensin AT1 receptor blockers and mineralocorticoid receptor antagonists (MRAs), are the cornerstone for the treatment of cardiovascular and renal diseases. Areas covered: The authors searched MEDLINE, PubMed and ClinicalTrials.gov to identify eligible full-text English language papers. Herein, the authors discuss AT2-receptor agonists and ACE2/angiotensin-(1- 7)/Mas-receptor axis modulators, direct renin inhibitors, brain aminopeptidase A inhibitors, biased AT1R blockers, chymase inhibitors, multitargeted drugs, vaccines and aldosterone receptor antagonists as well as aldosterone synthase inhibitors...
May 25, 2017: Expert Opinion on Drug Discovery
https://www.readbyqxmd.com/read/28536469/angiotensin-1-7-ameliorates-the-structural-and-biochemical-alterations-of-ovariectomy-induced-osteoporosis-in-rats-via-activation-of-ace-2-mas-receptor-axis
#3
Hatem M Abuohashish, Mohammed M Ahmed, Dina Sabry, Mahmoud M Khattab, Salim S Al-Rejaie
The local and systemic renin angiotensin system (RAS) influences the skeletal system micro-structure and metabolism. Studies suggested angiotensin 1-7 (Ang(1-7)) as the beneficial RAS molecule via Mas receptor activation. This study examines the function of Ang(1-7) in bone micro-architecture and metabolism in an ovariectomized (OVX) rodent model of osteoporosis. OVX rats showed structural and bone metabolic degeneration in parallel with suppressed expressions of the angiotensin converting enzyme-2 (ACE-2)/Ang(1-7)/Mas components...
May 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28533754/the-ace2-angiotensin-1-7-mas-receptor-axis-pleiotropic-roles-in-cancer
#4
REVIEW
Juanjuan Xu, Jinshuo Fan, Feng Wu, Qi Huang, Mengfei Guo, Zhilei Lv, Jieli Han, Limin Duan, Guorong Hu, Lian Chen, Tingting Liao, Wanli Ma, Xiaonan Tao, Yang Jin
Cancer remains one of the most common causes of death and disability and represents a major economic burden in industrialized nations. The renin-angiotensin system (RAS) has been well-recognized as one of the most important regulators of both normal and pathological physiological processes in the brain, kidney, heart, and blood vessels. The activation of the angiotensin-converting enzyme 2/angiotensin-(1-7)/mitochondrial assembly receptor [ACE2/Ang-(1-7)/MasR] axis, which is one component of the RAS, has recently been identified as a critical component of pulmonary systems, gastric mucosa, and cancer...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28533289/treatment-with-standard-and-low-dose-of-conjugated-equine-estrogen-differentially-modulates-estrogen-receptor-expression-and-response-to-angiotensin-ii-in-mesenteric-venular-bed-of-surgically-postmenopausal-hypertensive-rats
#5
Priscila Xavier Araujo, Tiago Januario Costa, Cinthya Echem, Maria Aparecida Oliveira, Rosangela Aparecida Santos-Eichler, Lucas Giglio Colli, Francesc Jimenez-Altayo, Elisabet Vila, Eliana Hiromi Akamine, Ana Paula Dantas, Graziela Scalianti Ceravolo, Maria Helena Catelli de Carvalho
Standard hormone therapy for menopausal women [conjugated equine estrogen (CEE) 0.625 mg] has been associated with increased risk of venous thrombosis. Regimens containing lower CEE dose (0.30 mg) have been clinically used to decrease side effects of supra-physiological doses of estrogen. In this study, we determined the effects of standard (SD) and low (LD) dose of CEE on venular function in ovariectomized (OVX) spontaneously hypertensive rats (SHR). Contractions to Angiotensin-II (Ang-II 10μM) in perfused mesenteric venular bed were markedly increased in OVX (21...
May 22, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28531801/ace-2-ang1-7-mas-cascade-mediates-ace-inhibitor-captopril-protective-effects-in-estrogen-deficient-osteoporotic-rats
#6
Hatem M Abuohashish, Mohammed M Ahmed, Dina Sabry, Mahmoud M Khattab, Salim S Al-Rejaie
The local role of the renin angiotensin system (RAS) was documented recently beside its conventional systemic functions. Studies showed that the effector angiotensin II (AngII) alters bone health, while inhibition of the angiotensin converting enzyme (ACE-1) preserved these effects. The newly identified Ang1-7 exerts numerous beneficial effects opposing the AngII. Thus, the current study examines the role of Ang1-7 in mediating the osteo-preservative effects of ACEI (captopril) through the G-protein coupled Mas receptor using an ovariectomized (OVX) rat model of osteoporosis...
May 19, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28529582/angiotensin-ii-receptor-blockers-induce-autophagy-in-prostate-cancer-cells
#7
Yunseo Woo, Yu-Jin Jung
Angiotensin II receptor blockers (ARBs) are anti-hypertensive drugs that competitively inhibit the binding of angiotensin II to its receptor, resulting in blood vessel dilation and the reduction of blood pressure. These antagonists are also known as sartans, and are a group of pharmaceuticals that possess tetrazole or imidazole groups. In the present study, the anticancer and antimetastatic effects of the ARBs fimasartan, losartan, eprosartan and valsartan on the human prostate cancer PC-3, DU-145 and LNCap-LN3 cell lines were investigated in vitro...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28528561/angiotensin-ii-for-the-treatment-of-vasodilatory-shock
#8
Ashish Khanna, Shane W English, Xueyuan S Wang, Kealy Ham, James Tumlin, Harold Szerlip, Laurence W Busse, Laith Altaweel, Timothy E Albertson, Caleb Mackey, Michael T McCurdy, David W Boldt, Stefan Chock, Paul J Young, Kenneth Krell, Richard G Wunderink, Marlies Ostermann, Raghavan Murugan, Michelle N Gong, Rakshit Panwar, Johanna Hästbacka, Raphael Favory, Balasubramanian Venkatesh, B Taylor Thompson, Rinaldo Bellomo, Jeffrey Jensen, Stew Kroll, Lakhmir S Chawla, George F Tidmarsh, Adam M Deane
Background Vasodilatory shock that does not respond to high-dose vasopressors is associated with high mortality. We investigated the effectiveness of angiotensin II for the treatment of patients with this condition. Methods We randomly assigned patients with vasodilatory shock who were receiving more than 0.2 μg of norepinephrine per kilogram of body weight per minute or the equivalent dose of another vasopressor to receive infusions of either angiotensin II or placebo. The primary end point was a response with respect to mean arterial pressure at hour 3 after the start of infusion, with response defined as an increase from baseline of at least 10 mm Hg or an increase to at least 75 mm Hg, without an increase in the dose of background vasopressors...
May 21, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28527109/erratum-to-clinical-pharmacokinetics-of-sacubitril-valsartan-lcz696-a-novel-angiotensin-receptor-neprilysin-inhibitor
#9
Surya Ayalasomayajula, Thomas Langenickel, Parasar Pal, Sreedevi Boggarapu, Gangadhar Sunkara
Sacubitril/valsartan (LCZ696) is indicated for the treatment of heart failure with reduced ejection fraction. Absorption of sacubitril/valsartan and conversion of sacubitril (prodrug) to sacubitrilat (neprilysin inhibitor) was rapid with maximum plasma concentrations of sacubitril, sacubitrilat, and valsartan (angiotensin receptor blocker) reaching within 0.5, 1.5-2.0, and 2.0-3.0 h, respectively. With a twofold increase in dose, an increase in the area under the plasma concentration-time curve was proportional for sacubitril, ~1...
May 19, 2017: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28515690/brain-renin-angiotensin-system-and-microglial-polarization-implications-for-aging-and-neurodegeneration
#10
REVIEW
Jose L Labandeira-Garcia, Ana I Rodríguez-Perez, Pablo Garrido-Gil, Jannette Rodriguez-Pallares, Jose L Lanciego, Maria J Guerra
Microglia can transform into proinflammatory/classically activated (M1) or anti-inflammatory/alternatively activated (M2) phenotypes following environmental signals related to physiological conditions or brain lesions. An adequate transition from the M1 (proinflammatory) to M2 (immunoregulatory) phenotype is necessary to counteract brain damage. Several factors involved in microglial polarization have already been identified. However, the effects of the brain renin-angiotensin system (RAS) on microglial polarization are less known...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28513286/azelnidipine-is-a-useful-medication-for-the-treatment-of-heart-failure-preserved-ejection-fraction
#11
Shunsuke Kiuchi, Shinji Hisatake, Takayuki Kabuki, Takashi Oka, Shintaro Dobashi, Takahiro Fujii, Takanori Ikeda
BACKGROUND: The optimal therapy in patients with heart failure preserved ejection fraction (HFpEF) and hypertension (HT) has not been revealed. The beta blocker (BB) and the renin angiotensin aldosterone system inhibitor (RAAS-I) are recommend as class IIa in patients with HFpEF. The calcium channel blocker (CCB), a major anti-hypertensive drugs in Japan, is also recommend as class IIa in patients with HFpEF. However, the difference between azelnidipine, an L type CCB, and cilnidipine, an N type CCB, is unclear...
May 17, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28512108/clinical-relevance-and-role-of-neuronal-at1-receptors-in-adam17-mediated-ace2-shedding-in-neurogenic-hypertension
#12
Jiaxi Xu, Srinivas Sriramula, Huijing Xia, Lisa Moreno-Walton, Frank Culicchia, Oliver Domenig, Marko Poglitsch, Eric Lazartigues
Rationale: Neurogenic hypertension is characterized by an increase in sympathetic activity and often resistance to drug treatments. We previously reported that it is also associated with a reduction of Angiotensin Converting Enzyme 2 (ACE2) and an increase in A Disintegrin And Metalloprotease 17 (ADAM17) activity in experimental hypertension. In addition, while multiple cells within the central nervous system have been involved in the development of neurogenic hypertension, the contribution of ADAM17 has not been investigated...
May 16, 2017: Circulation Research
https://www.readbyqxmd.com/read/28508436/bio-functional-properties-of-sardine-protein-hydrolysates-obtained-by-brewer-s-spent-yeast-and-commercial-proteases
#13
Elsa F Vieira, Olívia Pinho, Isabel Mplvo Ferreira
BACKGROUND: Canned sardine industry generates large amounts of protein rich waste, which demands a useful exploitation. This paper describes the potential use of muscle and viscera proteins from canned sardine by-products as substrate to obtain hydrolysates with biological and functional properties. Three enzymatic approaches, brewer's spent yeast (Bsy) proteases, Alcalase® and Neutrase® were applied to perform protein hydrolysis at the same proteolytic activity (1 U mL(-1) ), using an enzyme/substrate ratio of 20% (v/v), at 50 °C and for 7 h...
May 16, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28507470/evaluating-the-relationship-of-blood-pressure-plasma-angiotensin-peptides-and-aldosterone-with-cognitive-functions-in-patients-with-hypertension
#14
Selçuk Sen, Nermin Gürel, Baran Ufuktepe, Zeynep Günes Özünal, Çagla Büyüklü, Yagiz Üresin
Renin Angiotensin Aldosterone System (RAAS) plays an important role in the development of hypertension. On the other hand, hypertension is a well-known and independent risk factor for cognitive impairment. The aim of the present study was to evaluate the relationship of blood pressure control, plasma angiotensin peptides and aldosterone with cognitive functions. Forty-one patients who were under treatment with the same antihypertensive medications for at least three months were included in the study. Plasma angiotensin II, angiotensin 1-7, angiotensin IV, and aldosterone concentrations were analyzed using an enzyme-linked immunosorbent assay (ELISA)...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28506960/familial-analysis-of-epistatic-and-sex-dependent-association-of-genes-of-the-renin-angiotensin-aldosterone-system-and-blood-pressure
#15
Katrina J Scurrah, Angela Lamantia, Justine A Ellis, Stephen B Harrap
BACKGROUND: Renin-angiotensin-aldosterone system genes have been inconsistently associated with blood pressure, possibly because of unrecognized influences of sex-dependent genetic effects or gene-gene interactions (epistasis). METHODS AND RESULTS: We tested association of systolic blood pressure with single-nucleotide polymorphisms (SNPs) at renin (REN), angiotensinogen (AGT), angiotensin-converting enzyme (ACE), angiotensin II type 1 receptor (AGTR1), and aldosterone synthase (CYP11B2), including sex-SNP or SNP-SNP interactions...
June 2017: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/28502733/reduced-anxiety-like-behavior-in-transgenic-rats-which-chronically-overexpress-angiotensin-1-7-role-of-the-mas-receptor
#16
Lucas M Kangussu, Ana Flávia Almeida-Santos, Fabrício A Moreira, Marco A P Fontes, Robson A S Santos, Daniele C Aguiar, Maria José Campagnole-Santos
Angiotensin-(1-7) [Ang-(1-7)], a counterregulatory peptide of the renin-angiotensin system (RAS), exerts its cardiovascular and renal functions through the G-protein-coupled receptor Mas. More recently, Ang-(1-7) has also been implicated in the control of emotional states related to fear and anxiety. Here, we tested the hypothesis that transgenic rats overexpressesing Ang-(1-7) (TGR) show reduced anxiety-like behavior in two distinct animals models, the Elevated Plus Maze (EPM) and Vogel Conflict Test (VCT)...
May 11, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28501298/ace2-as-therapy-for-glomerular-disease-the-devil-is-in-the-detail
#17
Michael J Ross, Masaomi Nangaku
Angiotensin-converting enzyme 2 cleaves angiotensin (Ang) II to Ang(1-7), which antagonizes the deleterious effects of Ang II. In this issue, 2 groups administered angiotensin-converting enzyme 2 in murine models of kidney disease. Angiotensin-converting enzyme 2 did not improve glomerular injury in 2 models of mild diabetic nephropathy but was partially protective in an Alport syndrome model. These discrepant findings may be explained by the inability of angiotensin-converting enzyme 2 to reach the urinary space in the absence of severe proteinuria...
June 2017: Kidney International
https://www.readbyqxmd.com/read/28501115/postconditioning-attenuates-coronary-perivascular%C3%A2-and-interstitial-fibrosis-through-modulating-angiotensin-ii-receptors-and-angiotensin-converting-enzyme-2-after-myocardial-infarction
#18
Zhang-Feng Wang, Ning-Ping Wang, Suzanna Harmouche, Tiji Philip, Xue-Fen Pang, Feng Bai, Zhi-Qing Zhao
BACKGROUND: Postconditioning (Postcon) is known to reduce infarct size. This study tested the hypothesis that Postcon attenuates the perivascular and interstitial fibrosis after myocardial infarction through modulating angiotensin II-activated fibrotic cascade. MATERIALS AND METHODS: Male Sprague-Dawley rats were subjected to 45-min coronary occlusion followed by 1 and 6 wk of reperfusion. Postcon was applied at the onset of reperfusion with four cycles of 10/10-s reperfusion-ischemia at the onset of reperfusion...
May 1, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28500604/a-primer-to-angiotensin-peptide-isolation-stability-and-analysis-by-nano-liquid-chromatography-with-mass-detection
#19
Mariola Olkowicz, Stefan Chlopicki, Ryszard T Smolenski
The renin-angiotensin system (RAS) is an important element of cardiovascular and renal physiology and targeting the RAS by renin inhibitors, angiotensin (Ang) converting enzyme (ACE) inhibitors and Ang II type 1 receptor antagonists is effective in the treatment of hypertension, heart failure, and atherosclerosis. Quantification of Ang peptides is critical to establish the status of the RAS, but it is challenging due to low Ang peptides concentrations (fmol/mL or fmol/g), abundance of interfering substances, post sampling conversions, and difficulties with the specificity of the assay...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28500596/measuring-blood-pressure-using-a-noninvasive-tail-cuff-method-in-mice
#20
Yu Wang, Sean E Thatcher, Lisa A Cassis
The renin angiotensin system (RAS) is well known for its role in regulating blood pressure (BP). An activated RAS contributes to elevated blood pressure and is evident in both human and animal models of hypertension. Drugs that target the classic vasoconstrictive arm of the RAS (angiotensin II/AT1 receptor signaling) are potent anti-hypertensive agents in clinical setting. However, the newly discovered angiotensin-converting enzyme 2 (ACE2)/angiotensin-(1-7)/Mas receptor axis added new vitality to the hypertension field...
2017: Methods in Molecular Biology
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