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Angiotensin II

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https://www.readbyqxmd.com/read/28634582/cancer-stem-cells-in-moderately-differentiated-lip-squamous-cell-carcinoma-express-components-of-the-renin-angiotensin-system
#1
Rachna S Ram, Helen D Brasch, Jonathan C Dunne, Paul F Davis, Swee T Tan, Tinte Itinteang
AIM: We investigated the expression of the renin-angiotensin system (RAS) by cancer stem cell (CSC) subpopulations we have identified in moderately differentiated lip squamous cell carcinoma (MDLSCC). METHOD: Ten MDLSCC samples underwent 3,3-diaminobenzidine (DAB) and immunofluorescent immunohistochemical (IHC) staining for (pro)renin receptor (PRR), angiotensin-converting enzyme (ACE), angiotensin II receptor 1 (ATIIR1), and receptor 2 (ATIIR2). NanoString analysis and Western blotting (WB) were performed on six MDLSCC samples for gene and protein expression, respectively...
2017: Frontiers in Surgery
https://www.readbyqxmd.com/read/28630660/npc-exs-alleviate-endothelial-oxidative-stress-and-dysfunction-through-the-mir-210-downstream-nox2-and-vegfr2-pathways
#2
Hua Liu, Jinju Wang, Yusen Chen, Yanfang Chen, Xiaotang Ma, Ji C Bihl, Yi Yang
We have demonstrated that neural progenitor cells (NPCs) protect endothelial cells (ECs) from oxidative stress. Since exosomes (EXs) can convey the benefit of parent cells through their carried microRNAs (miRs) and miR-210 is ubiquitously expressed with versatile functions, we investigated the role of miR-210 in the effects of NPC-EXs on oxidative stress and dysfunction in ECs. NPCs were transfected with control and miR-210 scramble/inhibitor/mimic to generate NPC-EXs(con), NPC-EXs(sc), NPC-EXs(anti-miR-210), and NPC-EXs(miR-210)...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28629818/corydalis-hendersonii-hemsl-protects-against-myocardial-injury-by-attenuating-inflammation-and-fibrosis-via-nf-%C3%AE%C2%BAb-and-jak2-stat3-signaling-pathways
#3
Ruifeng Bai, Xu Yin, Xiao Feng, Yuan Cao, Yan Wu, Zhixiang Zhu, Chun Li, Pengfei Tu, Xingyun Chai
ETHNOPHARMACOLOGICAL RELEVANCE: Corydalis hendersonii Hemsl. (CH) with heat clearing and detoxifying effects are well described in Tibetan folk medicine. It has been used for centuries in China largely for the treatment of high altitude polycythemia, a pathophysiological condition referred to "plethora" in Tibetan medicine, hypertension, hepatitis, edema, gastritis, and other infectious diseases. AIM OF THE STUDY: To investigate the cardioprotective effects of Corydalis hendersonii extract in an ICR mouse model of myocardial ischemic injury...
June 16, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28629565/a-tri-exponential-model-for-intravoxel-incoherent-motion-analysis-of-the-human-kidney-in-silico-and-during-pharmacological-renal-perfusion-modulation
#4
René van der Bel, Oliver J Gurney-Champion, Martijn Froeling, Erik S G Stroes, Aart J Nederveen, C T Paul Krediet
In the kidneys, there is both blood flow through the capillaries and flow of pre-urine through the tubuli and collecting ducts. We hypothesized that diffusion-weighted (DW) MRI measures both blood and pre-urine flow when using a tri-exponential intravoxel incoherent motion (IVIM) model. Our aim was to systematically investigate and optimize tri-exponential IVIM-analysis for the kidney and test its sensitivity to renal perfusion changes in humans. The tri-exponential fit probes the diffusion coefficient (D), the intermediate (D*i) and fast (D*f) pseudo-diffusion coefficients, and their signal fractions, fD, fi and ff...
June 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28629525/erythropoietin-regulation-by-angiotensin-ii
#5
Yong-Chul Kim, Ognoon Mungunsukh, Regina M Day
The renin-angiotensin system (RAS) is a key regulator of blood pressure and blood volume homeostasis. The RAS is primarily comprised of the precursor protein angiotensinogen and the two proteases, renin and angiotensin-converting enzyme (ACE). Angiotensin I (Ang I) is derived from angiotensinogen by renin, but appears to have no biological activity. In contrast, angiotensin II (Ang II) that has a variety of biological functions in the cells is converted from Ang I through removal of two-C-terminal residues by ACE...
2017: Vitamins and Hormones
https://www.readbyqxmd.com/read/28626963/exercise-training-modulates-the-hepatic-renin-angiotensin-system-in-fructose-fed-rats
#6
Eliete Dalla Corte Frantz, Renata Frauches Medeiros, Isabele Gomes Giori, Juliana Bittencourt Silveira Lima, Thais Bento-Bernardes, Thaiane Gadioli Gaique, Caroline Fernandes-Santos, Tiago Fernandes, Edilamar Menezes Oliveira, Carla Paulo Vieira, Carlos Adam Conte-Junior, Karen Jesus Oliveira, Antonio Claudio Lucas da Nóbrega
The renin-angiotensin system (RAS) has been implicated in the development of metabolic syndrome. We investigated whether the hepatic RAS is modulated by exercise training and if this modulation improves the deleterious effects of fructose overload in rats. Male Wistar rats were divided into (n = 8 each) control (CT), exercise control (CT-Ex), high fructose (HFr) and exercise high fructose (HFr-Ex) groups. Fructose-drinking rats received D-fructose (100 g L(-1) ). After two weeks, CT-Ex and HFr-Ex rats were assigned to a treadmill training protocol at moderate-intensity for eight weeks (60 min day(-1) , four days/week)...
June 19, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28626916/unexpected-functions-of-angiotensin-converting-enzyme-beyond-its-enzymatic-activity
#7
REVIEW
Jean Martinez
Angiotensin converting enzyme (ACE) is a well-known enzyme, largely studied for its action on hypertension, as it produces angiotensin II from angiotensin I. This paper describes two original behaviours of ACE. We showed that ACE could hydrolyse gastrin, a neuropeptide from the gastrointestinal tract, releasing the C-terminal amidated dipeptide H-Asp-Phe-NH2 . This dipeptide is believed to be involved in the gastrin-induced acid secretion in the stomach. This hypothetic mechanism of action of gastrin resulted in a strategy to rationally design gastrin receptor antagonists...
June 19, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28625546/the-lateral-parabrachial-nucleus-and-central-angiotensinergic-mechanisms-in-the-control-of-sodium-intake-induced-by-different-stimuli
#8
Camila F Roncari, Richard B David, Patrícia M De Paula, Débora S A Colombari, Laurival A De Luca, Eduardo Colombari, José V Menani
Angiotensin II (ANG II) is a typical facilitatory stimulus for sodium appetite. Surprisingly, hyperosmolarity and central cholinergic stimulation, two classical antinatriorexigenic stimuli, also facilitate NaCl intake when they are combined with injections of the α2-adrenoceptor/imidazoline agonist moxonidine into the lateral parabrachial nucleus (LPBN). In the present study, we tested the relative importance of central angiotensinergic and cholinergic mechanisms for the control of water and NaCl intake by combining different dipsogenic or natriorexigenic stimuli with moxonidine injection into the LPBN...
June 15, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28625505/bioequivalence-study-of-a-new-fixed-dose-combination-tablet-containing-s-amlodipine-nicotinate-and-olmesartan-medoxomil-in-healthy-korean-male-subjects
#9
Mi Jin Oh, Hyun Hwan Hwang, Hyun Gyu Kim, Geun Hyeog Lee, Yun-Seok Cho, Sun Young Lee, Soo Yeon Kang, Kyung Hee Cho, Yun Young Lee, Yun Jeong Lee, Choon-Gon Jang, Seok-Yong Lee
PURPOSE: A fixed-dose combination (FDC) pill of amlodipine (relatively old calcium channel blocker as dihydropyridine) and olmesartan (relatively new angiotensin II receptor blocker) is used for hypertension that is not adequately controlled with a single-formulation drug. Because the FDC is a one-pill formulation, and amlodipine and olmesartan have different mechanisms of action, it is expected to improve patients' medication compliance and have an increased blood pressure-lowering efficacy...
June 15, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28625450/vasoplegic-syndrome-an-update-on-perioperative-considerations
#10
REVIEW
Henry Liu, Ling Yu, Longqiu Yang, Michael S Green
Vasoplegic syndrome (VS) is increasingly recognized as an important clinical entity in perioperative medicine. VS is characterized by significant arterial hypotension, normal or high cardiac output, low systemic vascular resistance, and increased requirements for intravenous volume and vasopressors. Tremendous variations exist regarding incidence reported in the literature and management at different institutions; and the incidence of VS is likely significantly higher than many anesthesiologists believe. Thus the aims of this article are to review the pertinent aspects related to VS and alert clinical anesthesiologists to this under-recognized yet very challenging clinical condition...
August 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28623899/renin-angiotensin-system-blockers-and-residual-kidney-function-loss-in-patients-initiating-peritoneal-dialysis-an-observational-cohort-study
#11
Jenny I Shen, Anjali B Saxena, Sitaram Vangala, Satvinder K Dhaliwal, Wolfgang C Winkelmayer
BACKGROUND: Although angiotensin-converting enzyme inhibitors (ACEI) and angiotensin-II receptor blockers (ARB) have been shown to preserve residual kidney function in a select group of Asian patients undergoing continuous ambulatory peritoneal dialysis (PD) in two small randomized clinical trials, the effectiveness of these drugs has yet to be demonstrated in a more diverse population of patients with multiple comorbid conditions. We investigated the association between ACEI/ARB use and development of recorded anuria in a cohort of patients initiating PD in the U...
June 17, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28623462/in-silico-investigations-of-chemical-constituents-of-clerodendrum-colebrookianum-in-the-anti-hypertensive-drug-targets-rock-ace-and-pde5
#12
Hemant Arya, Safiulla Basha Syed, Sorokhaibam Sureshkumar Singh, Dinakar R Ampasala, Mohane Selvaraj Coumar
Understanding the molecular mode of action of natural product is a key step for developing drugs from them. In this regard, this study is aimed to understand the molecular-level interactions of chemical constituents of Clerodendrum colebrookianum Walp., with anti-hypertensive drug targets using computational approaches. The plant has ethno-medicinal importance for the treatment of hypertension and reported to show activity against anti-hypertensive drug targets-Rho-associated coiled-coil protein kinase (ROCK), angiotensin-converting enzyme, and phosphodiesterase 5 (PDE5)...
June 16, 2017: Interdisciplinary Sciences, Computational Life Sciences
https://www.readbyqxmd.com/read/28620995/effects-of-tilianin-on-proliferation-migration-and-tgf-%C3%AE-smad-signaling-in-rat-vascular-smooth-muscle-cells-induced-with-angiotensin-ii
#13
Wenjiang Cao, Na Hu, Yong Yuan, Jiang Cheng, Xinhong Guo, Yanfang Wang, Xinchun Wang, Ping Hu
Flavonoid Tilianin was isolated from Dracocephalum moldavica, and its pharmacological mechanism on proliferation, migration and the TGF-β/Smad signaling pathway in rat vascular smooth muscle cells (VSMCs) induced with Angiotensin II (Ang II) was systematically evaluated. Primary rat VSMCs were stimulated with Ang II to induce proliferation. The cells were then treated with Tilianin for 24 or 48 h. MTT assay and Transwell assays were used to evaluate the effects of Tilianin on proliferation and migration. The expression of intracellular proliferating cell nuclear antigen (PCNA), intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) were measured by immunohistochemistry as verification of effects on proliferation and migration...
June 16, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28620011/dietary-restriction-but-not-angiotensin-ii-type-1-receptor-blockade-improves-dna-damage-related-vasodilator-dysfunction%C3%A2-in-rapidly-aging-ercc1-%C3%AE-mice
#14
Haiyan Wu, Bibi S van Thiel, Paula Katherine Bautista-Nino, Erwin Reiling, Matej Durik, Frank P J Leijten, Yanto Ridwan, Renata M C Brandt, Harry van Steeg, Martijn E T Dollé, Wilbert P Vermeij, Jan H J Hoeijmakers, Jeroen Essers, Ingrid van der Pluijm, A H Jan Danser, Anton J M Roks
DNA damage is an important contributor to endothelial dysfunction and age-related vascular disease. Recently, we demonstrated in a DNA repair-deficient, prematurely aging mouse model ( Ercc1(∆/-) mice) that dietary restriction (DR) strongly increases life- and health span, including ameliorating endothelial dysfunction, by preserving genomic integrity. In this mouse mutant displaying prominent accelerated, age-dependent endothelial dysfunction we investigated the signaling pathways involved in improved endothelium-mediated vasodilation by DR, and explore the potential role of the renin-angiotensin system ...
June 15, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28619367/the-vasoprotective-axes-of-the-renin-angiotensin-system-physiological-relevance-and-therapeutic-implications-in-cardiovascular-hypertensive-and-kidney-diseases
#15
REVIEW
Xiao C Li, Jianfeng Zhang, Jia L Zhuo
The renin-angiotensin system (RAS) is undisputedly one of the most prominent endocrine (tissue-to-tissue), paracrine (cell-to-cell) and intracrine (intracellular/nuclear) vasoactive systems in the physiological regulation of neural, cardiovascular, blood pressure, and kidney function. The importance of the RAS in the development and pathogenesis of cardiovascular, hypertensive and kidney diseases has now been firmly established in clinical trials and practice using renin inhibitors, angiotensin-converting enzyme (ACE) inhibitors, type 1 (AT1) angiotensin II (ANG II) receptor blockers (ARBs), or aldosterone receptor antagonists as major therapeutic drugs...
June 12, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28618426/renoprotective-effect-of-angiotensin-converting-enzyme-inhibitors-and-angiotensin-ii-receptor-blockers-in-diabetic-patients-with-proteinuria
#16
Feng-Yi Hsu, Fang-Ju Lin, Huang-Tz Ou, Shih-Hui Huang, Chi-Chuan Wang
BACKGROUND/AIMS: Limited evidence exists on the choice of angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin II receptor blockers (ARBs) in diabetic patients with nephropathy. We aim to assess the renal effectiveness and safety of these drugs among diabetic nephropathy patients. METHODS: This retrospective cohort study was conducted with diabetic nephropathy patients who initiated ACEI or ARB monotherapy. The primary outcome was a composite of end stage of renal disease and renal transplantation, and the secondary outcome was all-cause mortality...
2017: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/28616215/the-impact-of-renal-protection-clinics-on-prescription-of-and-adherence-to-cardioprotective-drug-therapy-in-chronic-kidney-disease-patients
#17
Fanny Lepeytre, Héloise Cardinal, Lorraine Fradette, Jacobien Verhave, Marc Dorais, Jacques LeLorier, Vincent Pichette, François Madore
Background: The aim of this study was to assess the impact of follow-up in renal protection clinics on the prescription of and adherence to cardioprotective drugs in patients with chronic kidney disease (CKD). Methods: We studied stage 4 and 5 CKD patients who initiated follow-up in three renal protection clinics. The prescription pattern of antihypertensive agents (AHA) and lipid-lowering agents (LLAs) was measured as the percentage of patients who are prescribed the agents of interest at a given time. Adherence to drug therapy was defined as the percentage of days, during a pre-defined observation period, in which patients have an on-hand supply of their prescribed medications...
June 2017: Clinical Kidney Journal
https://www.readbyqxmd.com/read/28615545/inhibitory-effects-of-low-decibel-infrasound-on-the-cardiac-fibroblasts-and-the-involved-mechanism
#18
Wei Jin, Qin-Qin Deng, Bao-Ying Chen, Zhen-Xing Lu, Qing Li, Hai-Kang Zhao, Pan Chang, Jun Yu, Zhao-Hui Pei
INTRODUCTION: Infrasound is a mechanical vibration wave with frequency between 0.0001 and 20 Hz. It has been established that infrasound of 120 dB or stronger is dangerous to humans. However, the biological effects of low decibel infrasound are largely unknown. The purpose of this study was to investigate the effects of low decibel infrasound on the cardiac fibroblasts. MATERIALS AND METHODS: The cardiac fibroblasts were isolated and cultured from Sprague-Dawley rats...
May 2017: Noise & Health
https://www.readbyqxmd.com/read/28614703/circulating-angiotensin-type-ii-receptor-possible-marker-for-antibody-mediated-rejection-after-renal-transplantation
#19
Pamela M Kimball, Gaurav Gupta, Felecia McDougan
BACKGROUND: Presence of antibody[Ab] against angiotensin receptor[AT1R] indicates heightened risk for antibody mediated rejection[AMR] after transplantation but is insufficient as a marker. We speculated AT1R might be released systemically because of AMR and might be a useful biomarker. METHODS: AT1R was measured in blood from 73 Normals and 72 renal patients pre- and post-transplantation. Patients were stratified as AMR-free[Gp1], AMR<1yr[Gp2] and AMR>1yr[Gp3]...
June 11, 2017: Human Immunology
https://www.readbyqxmd.com/read/28612837/pharmacotherapy-angiotensin-ii-a-new-tool-in-vasodilatory-shock
#20
Irene Fernández-Ruiz
No abstract text is available yet for this article.
June 14, 2017: Nature Reviews. Cardiology
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