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Ang 2 AND nitric oxide

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https://www.readbyqxmd.com/read/28282029/distribution-of-pericellular-matrix-molecules-in-the-temporomandibular-joint-and-their-chondroprotective-effects-against-inflammation
#1
Wern Cui Chu, Shipin Zhang, Timothy J Sng, Yu Jie Ong, Wen-Li Tan, Vivien Y Ang, Casper B Foldager, Wei Seong Toh
The objectives of this study were to (1) determine the distribution and synthesis of pericellular matrix (PCM) molecules (collagen VI, collagen IV and laminin) in rat temporomandibular joint (TMJ) and (2) investigate the effects of PCM molecules on chondrocytes against inflammation in osteoarthritis. Four zones (fibrous, proliferating, mature and hypertrophic) of condylar cartilage and three bands (anterior, intermediate and posterior) of disc were analysed by immunohistochemistry for the presence of PCM molecules in rat TMJs...
March 10, 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/28218456/endothelial-cells-inhibit-the-angiotensin-ii-induced-phenotypic-modulation-of-rat-vascular-fibroblasts
#2
Xu Jia-Ying, Chang Nen-Bin, Li Tao, Jiang Rui, Sun Xiao-Lei, He Yan-Zheng, Jiang Jun
PURPOSE: The phenotypic modulation of vascular adventitial fibroblasts plays an important role in vascular remodeling. Evidence have shown that endothelial cells and adventitial fibroblasts interact under certain conditions. In this study, we investigated the influence of endothelial cells on the phenotypic modulation of adventitial fibroblasts. METHODS: Endothelial cells and adventitial fibroblasts from rat thoracic aorta were cultivated in a co-culture system and adventitial fibroblasts were induced with angiotensin II (Ang II)...
February 20, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28160390/angiotensin-ii-type-ii-receptors-and-colonic-dysmotility-in-2-4-dinitrofluorobenzenesulfonic-acid-induced-colitis-in-rats
#3
M G Zizzo, M Auteri, A Amato, G Caldara, D Nuzzo, M Di Carlo, R Serio
BACKGROUND: Angiotensin II (Ang II), the main peptide of the renin-angiotensin system (RAS), has been suggested to be involved in inflammatory bowel diseases. Since RAS has emerged as gut motility regulator, and dysmotility is associated with intestinal inflammation, our objective was to investigate in rat 2,4-dinitrobenzenesulfonic acid (DNBS)-induced colitis the functionality of RAS and its contribution to colonic motor alterations. METHODS: The effects of Ang II on the longitudinal colonic muscular contractility of control and DNBS-treated rats were characterized in vitro...
February 3, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28131844/mas-receptor-is-involved-in-the-estrogen-receptor-induced-nitric-oxide-dependent-vasorelaxation
#4
Agua Sobrino, Susana Vallejo, Susana Novella, Macarena Lázaro-Franco, Ana Mompeón, Carlos Bueno-Betí, Thomas Walther, Carlos Sánchez-Ferrer, Concepción Peiró, Carlos Hermenegildo
The Mas receptor is involved in the angiotensin (Ang)-(1-7) vasodilatory actions by increasing nitric oxide production (NO). We have previously demonstrated an increased production of Ang-(1-7) in human umbilical vein endothelial cells (HUVEC) exposed to estradiol (E2), suggesting a potential cross-talk between E2 and the Ang-(1-7)/Mas receptor axis. Here, we explored whether the vasoactive response and NO-related signalling exerted by E2 are influenced by Mas. HUVEC were exposed to 10nM E2 for 24h in the presence or absence of the selective Mas receptor antagonist A779, and the estrogen receptor (ER) antagonist ICI182780 (ICI)...
January 25, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28096047/cellular-basis-of-angiotensin-1-7-induced-augmentation-of-left-ventricular-functional-performance-in-heart-failure
#5
Xiaowei Zhang, Heng-Jie Cheng, Peng Zhou, Dalane W Kitzman, Carlos M Ferrario, Wei-Min Li, Che Ping Cheng
BACKGROUND: Angiotensin-(1-7) [Ang-(1-7)] exhibits cardiovascular effects opposite those of angiotensin II (Ang II), thus providing protection against heart disease. However, how Ang-(1-7) imparts cardioprotection is unclear, and its direct cardiac effects are controversial. Whether heart failure (HF) alters cardiac contractile responses to Ang-(1-7) remains undetermined. We tested the hypothesis that in HF, Ang-(1-7) may produce positive modulation on [Ca(2+)]i regulation, enhancing left ventricular (LV) and myocyte contraction and relaxation via Ang-(1-7) Mas receptor coupled with nitric oxide (NO)/bradykinin (BK)-mediated mechanism...
January 10, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28088475/role-of-some-vasoactive-mediators-in-scorpion-envenomed-children-possible-relation-to-envenoming-outcome
#6
Sahar E M El-DeeK, Ayat A Sayed, Ahmed Y Nassar, Zeynab M Mohey-Eldeen, Hussein M Eldeeb, Abdel-Raheim M A Meki
Scorpion envenomation causes an autonomic storm resulting in changes in the vasoactive mediators' levels which lead to myocardial damage, cardiovascular disturbances, peripheral circulatory failure, pulmonary edema, multi-system-organ-failure and death. The study aimed to determine the circulating levels of adrenaline, noradrenaline, angiotensin converting enzyme (ACE), Angiotensin II (Ang II), kallikrein enzyme, nitric oxide (NO), aldosterone, and electrolytes Na(+), K(+) and Ca(+2) in scorpion envenomed children and to evaluate the potential relation between these vasoactive mediators, the severity of scorpion envenoming and the clinical outcome of envenomed children...
March 1, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28052871/myoglobin-facilitates-angiotensin-ii-induced-constriction-of-renal-afferent-arterioles
#7
Zhi Zhao Liu, Susanne Mathia, Tamara Margit Pahlitzsch, Inggrid Christine Wennysia, Pontus B Persson, En Yin Lai, Anica Högner, Min Ze Xu, Rudolf Schubert, Christian Rosenberger, Andreas Patzak
Vasoconstriction plays an important role in the development of acute kidney injury in rhabdomyolysis. We hypothesized that myoglobin enhances the angiotensin II (Ang II) response in afferent arterioles by increasing superoxide and reducing nitric oxide (NO) bioavailability. Afferent arterioles of C57Bl6 mice were isolated perfused and vasoreactivity was analyzed using video microscopy. NO bioavailability, superoxide concentration in the vessels wall, and changes in cytosolic calcium were measured using fluorescence techniques...
January 4, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28036029/fenofibrate-therapy-restores-antioxidant-protection-and-improves-myocardial-insulin-resistance-in-a-rat-model-of-metabolic-syndrome-and-myocardial-ischemia-the-role-of-angiotensin-ii
#8
Luz Ibarra-Lara, María Sánchez-Aguilar, Alicia Sánchez-Mendoza, Leonardo Del Valle-Mondragón, Elizabeth Soria-Castro, Elizabeth Carreón-Torres, Eulises Díaz-Díaz, Héctor Vázquez-Meza, Verónica Guarner-Lans, María Esther Rubio-Ruiz
Renin-angiotensin system (RAS) activation promotes oxidative stress which increases the risk of cardiac dysfunction in metabolic syndrome (MetS) and favors local insulin resistance. Fibrates regulate RAS improving MetS, type-2 diabetes and cardiovascular diseases. We studied the effect of fenofibrate treatment on the myocardic signaling pathway of Angiotensin II (Ang II)/Angiotensin II type 1 receptor (AT1) and its relationship with oxidative stress and myocardial insulin resistance in MetS rats under heart ischemia...
December 28, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27983965/cyanidin-3-glucoside-attenuates-angiotensin-ii-induced-oxidative-stress-and-inflammation-in-vascular-endothelial-cells
#9
Sivanan Sivasinprasasn, Rungusa Pantan, Sarinthorn Thummayot, Jiraporn Tocharus, Apichart Suksamrarn, Chainarong Tocharus
Angiotensin II (Ang II) causes oxidative stress and vascular inflammation, leading to vascular endothelial cell dysfunction, and is associated with the development of inflammatory cardiovascular diseases such as atherosclerosis. Therefore, interventions of oxidative stress and inflammation may contribute to the reduction of cardiovascular diseases. Cyanidin-3-glucoside (C3G) plays a role in the prevention of oxidative damage in several diseases. Here, we investigated the effect of C3G on Ang II-induced oxidative stress and vascular inflammation in human endothelial cells (EA...
October 28, 2016: Chemico-biological Interactions
https://www.readbyqxmd.com/read/27975141/glucose-and-angiotensin-ii-derived-endothelial-extracellular-vesicles-regulate-endothelial-dysfunction-via-erk1-2-activation
#10
Kumiko Taguchi, Mari Hida, Haruka Narimatsu, Takayuki Matsumoto, Tsuneo Kobayashi
In various diseases, including diabetes, extracellular vesicles (EVs) have been detected in circulation and tissues. EVs are small membrane vesicles released from various cell types under varying conditions. Recently, endothelial cell-derived EVs (EEVs) were identified as a marker of endothelial dysfunction in diabetes, but the ensuing mechanisms remain poorly understood. In this study, we dissected the ensuing pathways with respect to nitric oxide (NO) production under the condition of type 2 diabetes. Human umbilical vein endothelial cells (HUVECs) were stimulated with glucose alone and with glucose in combination with angiotensin II (Ang II) for 48 h...
December 14, 2016: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/27912196/nox-isoforms-in-the-development-of-abdominal-aortic-aneurysm
#11
Kin Lung Siu, Qiang Li, Yixuan Zhang, Jun Guo, Ji Youn Youn, Jie Du, Hua Cai
Oxidative stress plays an important role in the formation of abdominal aortic aneurysm (AAA), and we have recently established a causal role of uncoupled eNOS in this severe human disease. We have also shown that activation of NADPH oxidase (NOX) lies upstream of uncoupled eNOS. Therefore, identification of the specific NOX isoforms that are required for eNOS uncoupling and AAA formation would ultimately lead to novel therapies for AAA. In the present study, we used the Ang II infused hph-1 mice to examine the roles of NOX isoforms in the development of AAA...
April 2017: Redox Biology
https://www.readbyqxmd.com/read/27909412/modeling-disease-progression-angiotensin-ii-indirectly-inhibits-nitric-oxide-production-via-adma-accumulation-in-spontaneously-hypertensive-rats
#12
Haidong Wang, Hao Jiang, Haochen Liu, Xue Zhang, Guimei Ran, Hua He, Xiaoquan Liu
Nitric oxide (NO) production impairment is involved in the onset and development of hypertension. Although NO production impairment in spontaneously hypertensive rat (SHR) has been reported in a variety of researches, the time course of this progressive procedure, as well as its relationship with asymmetric dimethylarginine (ADMA) and angiotensin II (Ang II), has not been quantified. The aim of this research is to establish a mechanism-based disease progression model to assess Ang II and ADMA's inhibition of NO production in SHR's disease progression with/without ramipril's intervention...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27906747/update-on-angiotensin-at2-receptors
#13
Robert M Carey
PURPOSE OF REVIEW: This review updates major new findings and concepts introduced during the past year on the role of angiotensin II (Ang II) subtype 2 receptors (AT2Rs) in the control of blood pressure and renal function. RECENT FINDINGS: AT2R activation prevents sodium (Na) retention and lowers blood pressure in the Ang II infusion model of experimental hypertension and prevents salt-sensitive hypertension in the obese Zucker rat model of obesity and the metabolic syndrome...
March 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/27905921/systematic-review-of-the-role-of-angiopoietin-1-and-angiopoietin-2-in-plasmodium-species-infections-biomarkers-or-therapeutic-targets
#14
Gerdie M de Jong, Jasper J Slager, Annelies Verbon, Jaap J van Hellemond, Perry J J van Genderen
BACKGROUND: Levels of both angiopoietin-1 (Ang-1) and angiopoietin-2 (Ang-2) correlate with malaria disease severity and are proposed as biomarkers and possible therapeutic targets. To establish their role in malaria, a systematic review was performed of the literature on Ang-1 and Ang-2 with regard to their potential as biomarkers in malaria and discuss their possible place in adjuvant treatment regimens. METHODS: Ten electronic databases were systematically searched to identify studies investigating Ang-1 and Ang-2 in human and murine malaria in both clinical and experimental settings...
December 1, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27861620/prazosin-can-prevent-glucocorticoid-mediated-capillary-rarefaction
#15
Erin R Mandel, Emily C Dunford, Anastassia Trifonova, Ghoncheh Abdifarkosh, Trevor Teich, Michael C Riddell, Tara L Haas
Glucocorticoids (GC) elicit skeletal muscle capillary rarefaction, which can subsequently impair blood distribution and muscle function; however, the mechanisms have not been established. We hypothesized that CORT would inhibit endothelial cell survival signals but that treatment with the alpha-1 adrenergic receptor inhibitor prazosin, which leads to angiogenesis in skeletal muscle of healthy rats, would reverse these effects and induce angiogenesis within the skeletal muscle of corticosterone (CORT)-treated rats...
2016: PloS One
https://www.readbyqxmd.com/read/27849390/adverse-effects-of-tempol-on-hidrosaline-balance-in-rats-with-acute-sodium-overload
#16
N M Kouyoumdzian, Nl Rukavina Mikusic, G Cao, M R Choi, Sl Della Penna, B E Fernández, J E Toblli, M I Rosón
We studied the effects of tempol, an oxygen radical scavenger, on hydrosaline balance in rats with acute sodium overload. Male rats with free access to water were injected with isotonic (control group) or hypertonic saline solution (0.80 mol/l NaCl) either alone (Na group) or with tempol (Na-T group). Hydrosaline balance was determined during a 90 min experimental period. Protein expressions of aquaporin 1 (AQP1), aquaporin 2 (AQP2), angiotensin II (Ang II) and endothelial nitric oxide synthase (eNOS) were measured in renal tissue...
November 2016: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/27822383/neuronal-nitric-oxide-synthase-in-hypertension-an-update
#17
REVIEW
Yin Hua Zhang
Hypertension is a prevalent condition worldwide and is the key risk factor for fatal cardiovascular complications, such as stroke, sudden cardiac death and heart failure. Reduced bioavailability of nitric oxide (NO) in the endothelium is an important precursor for impaired vasodilation and hypertension. In the heart, NO deficiency deteriorates the adverse consequences of pressure-overload and causes cardiac hypertrophy, fibrosis and myocardial infarction which lead to fatal heart failure and sudden cardiac death...
2016: Clinical Hypertension
https://www.readbyqxmd.com/read/27820727/the-role-of-brain-angiotensin-ii-type-2-receptors-and-nitric-oxide-in-the-renal-sympathoinhibitory-response-to-acute-volume-expansion-in-conscious-rats
#18
Mohammed H Abdulla, Edward J Johns
OBJECTIVE: The study was performed to investigate the role of angiotensin II type 2 (AT2) receptors and nitric oxide in the renal sympathoinhibitory response to volume expansion (VEP). METHOD: Conscious rats were subjected to volume expansion (VEP) [0.25% body weight/min saline for 10 min intravenously (i.v.)] following intracerebroventricular (i.c.v.) infusion of either saline or angiotensin II (Ang II), or a combination of Ang II with either losartan, PD123319, or N-nitro-L-arginine methyl ester (L-NAME)...
February 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/27703996/host-biomarkers-are-associated-with-response-to-therapy-and-long-term-mortality-in-pediatric-severe-malaria
#19
Andrea L Conroy, Michael Hawkes, Chloe R McDonald, Hani Kim, Sarah J Higgins, Kevin R Barker, Sophie Namasopo, Robert O Opoka, Chandy C John, W Conrad Liles, Kevin C Kain
Background.  Host responses to infection are critical determinants of disease severity and clinical outcome. The development of tools to risk stratify children with malaria is needed to identify children most likely to benefit from targeted interventions. Methods.  This study investigated the kinetics of candidate biomarkers of mortality associated with endothelial activation and dysfunction (angiopoietin-2 [Ang-2], soluble FMS-like tyrosine kinase-1 [sFlt-1], and soluble intercellular adhesion molecule-1 [sICAM-1]) and inflammation (10 kDa interferon γ-induced protein [CXCL10/IP-10] and soluble triggering receptor expressed on myeloid cells-1 [sTREM-1]) in the context of a randomized, double-blind, placebo-controlled, parallel-arm trial evaluating inhaled nitric oxide versus placebo as adjunctive therapy to parenteral artesunate for severe malaria...
September 2016: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/27679746/angiotensin-type-2-receptor-at2r-activation-induces-hypotension-in-apolipoprotein-e-deficient-mice-by-activating-peroxisome-proliferator-activated-receptor-%C3%AE
#20
Ming Li, Thor Tejada, Jonathan P Lambert, Chad K Nicholson, Eiji Yahiro, Vats T Ambai, Syeda F Ali, Eddie W Bradley, Robert M Graham, Louis J Dell'Italia, John W Calvert, Nawazish Naqvi
Angiotensin II (Ang II) modulates blood pressure and atherosclerosis development through its vascular type-1 (AT1R) and type-2 (AT2R) receptors, which have opposing effects. AT2R activation produces hypotension, and is anti-atherogenic. Targeted overexpression of AT2Rs in vascular smooth muscle cells (VSMCs) indicates that these effects are due to increased nitric oxide (NO) generation. However, the role of endogenous VSMC AT2Rs in these events is unknown. Effect of 7-day low-dose Ang II-infusion (12 µg/kg/hr) on blood pressure was tested in 9-week-old apoE((-/-)) mice fed a low or high cholesterol diet (LCD or HCD, respectively)...
2016: American Journal of Cardiovascular Disease
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