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Ang 2 AND ROS

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https://www.readbyqxmd.com/read/28316179/-effects-and-related-mechanism-of-angiotensin-1-7-on-toll-like-receptor-4-mediated-oxidative-stress-in-human-umbilical-vein-endothelial-cells
#1
W F Yan, J J Xue, H Y Yang, B Liang, Z M Yang
Objective: To explore the role and related mechanisms of angiotensin-(1-7)(Ang-(1-7)) on Toll-like receptor 4 (TLR4) mediated oxidized low-density lipoprotein(ox-LDL)-induced oxidative stress in human umbilical vein endothelial cells (HUVECs). Methods: HUVECs were cultured in vitro and divided into six groups: the control group (normal medium), the ox-LDL group(treated with 75 mg/L ox-LDL), the ox-LDL+ Ang-(1-7) group (1 μmol/L Ang-(1-7) pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL), the ox-LDL+ Ang-(1-7)+ A-779 group(1 μmol/L A-779 (Mas receptor) pretreated for 30 minutes, 1 μmol/L Ang-(1-7) pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL), the ox-LDL+ A-779 group (1 μmol/L A-779 pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL), the ox-LDL+ HTA125 group (10 μg/L HTA125 (TLR4-blocking antibody) pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL )...
March 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28292711/co-releasing-molecules-corm2-attenuates-angiotensin-ii-induced-human-aortic-smooth-muscle-cell-migration-through-inhibition-of-ros-il-6-generation-and-matrix-metalloproteinases-9-expression
#2
Ming-Horng Tsai, Chiang-Wen Lee, Lee-Fen Hsu, Shu-Yu Li, Yao-Chang Chiang, Ming-Hsueh Lee, Chun-Han Chen, Hwey-Fang Liang, Jia-Mei How, Pey-Jium Chang, Ching-Mei Wu, I-Ta Lee
Ang II has been involved in the pathogenesis of cardiovascular diseases, and matrix metalloproteinase-9 (MMP-9) induced migration of human aortic smooth muscle cells (HASMCs) is the most common and basic pathological feature. Carbon monoxide (CO), a byproduct of heme breakdown by heme oxygenase, exerts anti-inflammatory effects in various tissues and organ systems. In the present study, we aimed to investigate the effects and underlying mechanisms of carbon monoxide releasing molecule-2 (CORM-2) on Ang II-induced MMP-9 expression and cell migration of HASMCs...
March 1, 2017: Redox Biology
https://www.readbyqxmd.com/read/28215000/angiotensin-ii-receptor-blockers-attenuate-lipopolysaccharide-induced-memory-impairment-by-modulation-of-nf-%C3%AE%C2%BAb-mediated-bdnf-creb-expression-and-apoptosis-in-spontaneously-hypertensive-rats
#3
Ruby Goel, Shahnawaz Ali Bhat, Kashif Hanif, Chandishwar Nath, Rakesh Shukla
Clinical studies demonstrated a positive correlation between hypertension and cognitive decline. Beneficial effects of angiotensin II receptor blockers on cognitive functions have also been reported earlier; however, its role in chronic neuroinflammation-induced memory impairment in the hypertensive state is not well understood. Therefore, in the present study, we investigated the effect of angiotensin II receptor blockers on memory impairment induced by lipopolysaccharide (LPS) in spontaneously hypertensive rats (SHRs)...
February 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28152939/clinical-specialist-radiation-therapists-csrt-creating-capacity-while-improving-quality-of-care
#4
Michelle Ang, Laura Zychla, Kate Bak, Lynne Nagata, Hasmik Beglaryan, Jillian Ross, Asad Husain, Carina Simniceanu, Eric Gutierrez, Padraig Richard Warde, Nicole Harnett
124 Background: Ontario's cancer system faces many challenges, including a rising incidence of cancer, aging population, increasingly complex cancer treatment, and health human resource (HHR) constraints. In response, Cancer Care Ontario and the Ontario Ministry of Health and Long Term Care collaborated on a project to assess whether a new advanced practice radiation therapist role - the 'Clinical Specialist Radiation Therapist' (CSRT) - could enhance access to high quality, innovative care by optimizing the use of HHR...
March 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28011270/h2s-inhibits-angiotensin-ii-induced-atrial-kv1-5-upregulation-by-attenuating-nox4-mediated-ros-generation-during-atrial-fibrillation
#5
Guihua Lu, Chenggui Xu, Kaiyu Tang, Juhong Zhang, Qinglang Li, Longyun Peng, Yesong Wang, Zhibin Huang, Xiuren Gao
Our previous study demonstrated that angiotensin II (Ang II) upregulates the expression of Kv1.5, a promising target for atrial fibrillation (AF) therapy, by activating ROS-dependent P-Smad2/3 and P-ERK 1/2. A recent study showed that hydrogen sulfide (H2S) may modulate the effects of angiotensin II (Ang II) by inhibiting the NADPH oxidase 4 (Nox4)-ROS signaling in the heart. The present study aimed to determine whether H2S is involved in the regulation of atrial Kv1.5 via ROS-related mechanisms in AF. Cultured neonatal rat atrial myocytes and a beagle model of AF were used for this study...
January 29, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28010122/lysyl-oxidase-induces-vascular-oxidative-stress-and-contributes-to-arterial-stiffness-and-abnormal-elastin-structure-in-hypertension-role-of-p38mapk
#6
Sonia Martínez-Revelles, Ana B García-Redondo, María S Avendaño, Saray Varona, Teresa Palao, Mar Orriols, Fernanda R Roque, Ana Fortuño, Rhian M Touyz, Jose Martínez-González, Mercedes Salaices, Cristina Rodríguez, Ana M Briones
AIMS: Vascular stiffness, structural elastin abnormalities, and increased oxidative stress are hallmarks of hypertension. Lysyl oxidase (LOX) is an elastin crosslinking enzyme that produces H2O2 as a by-product. We addressed the interplay between LOX, oxidative stress, vessel stiffness, and elastin. RESULTS: Angiotensin II (Ang II)-infused hypertensive mice and spontaneously hypertensive rats (SHR) showed increased vascular LOX expression and stiffness and an abnormal elastin structure...
January 30, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/27919636/adrenomedullin-and-angiotensin-ii-signaling-pathways-involved-in-the-effects-on-cerebellar-antioxidant-enzymes-activity
#7
Figueira Leticia, Israel Anita
Human adrenomedullin (AM) is a 52-amino acid peptide involved in cardiovascular control. AM has two specific receptors formed by the calcitonin-receptor-like receptor (CRLR) and receptor activity-modifying protein (RAMP) 2 or 3, known as AM1 and AM2 receptors, respectively. In addition, AM has appreciable affinity for the calcitonin gene-1 related peptide receptor (CGRP1), composed of CRLR/RAMP1. In brain, AM and their receptors are expressed in several localized areas, including the cerebellum. AM has been reported as an antioxidant...
January 2017: Brain Research Bulletin
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
#8
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/27822383/neuronal-nitric-oxide-synthase-in-hypertension-an-update
#9
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/27807688/angiotensin-ii-induced-early-and-late-inflammatory-responses-through-noxs-and-mapk-pathways
#10
Xi Zhang, Jia Yang, Xinyi Yu, Si Cheng, Hua Gan, Yunfeng Xia
Angiotensin II (Ang II) dysregulation has been determined as cause or an effect of many diseases. The relationship between Ang II and reactive oxygen species (ROS), which are generated by enzymes in the nicotinamide adenine dinucleotide phosphate oxidase (NOX) family, has been the focus of many researchers for years. Inflammation in response to the activities of various NOXs with differing time-dependent characteristics was reported. It is still unclear how these factors interplay over the course of the inflammatory response and how signal transduction through mitogen-activated protein kinase (MAPK) pathways...
November 2, 2016: Inflammation
https://www.readbyqxmd.com/read/27754201/ish-pre-2-the-vascular-phenotype-in-hypertension-molecular-mechanisms-and-clinical-implications
#11
Rhian M Touyz
Pathophysiological mechanisms contributing to hypertension include endothelial dysfunction and vascular ignalling. These changes are initially adaptive but chronically become maladaptive leading to vascular damage and loss of function. Common to these processes are changes in the characteristics of vascular cells to a pro-infl ammatory, vasoconstrictory and proliferative phenotype, infl uenced by activation of the RAS and oxidative stress. Increased ROS production and decreased cellular antioxidant defense mechanisms, contribute to oxidative stress, which infl uences redox-sensitive Ang II ignalling that promotes vascular injury in hypertension...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754054/os-15-02-matrix-metalloproteinase-2-knockout-protects-from-angiotensin-ii-induced-vascular-injury-in-part-via-inhibition-of-egfr-and-erk1-2-activation
#12
Pierre Paradis, Tlili Barhoumi, Muhammad Oneeb Rehman Mian, Julio C Fraulob-Aquino, Asia Rehman, Nourredine Idris-Khodja, Ernesto L Schiffrin
OBJECTIVE: Matrix metalloproteinase 2 (MMP2) is involved in cardiovascular disease. Whether MMP2 plays a role in hypertension and vascular damage is unknown. We hypothesized that Mmp2 knockout will prevent angiotensin (Ang) II-induced hypertension and vascular injury. DESIGN AND METHOD: Mmp2 knockout (Mmp2) and wild-type (WT) mice were infused with Ang II (1000 ng/kg/min, SC) for 14 days. Systolic blood pressure (SBP) was measured by telemetry, and mesenteric artery (MA) endothelial function and vascular remodeling by pressurized myography...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27698414/scaffold-hopping-toward-agomelatine-novel-3-4-dihydroisoquinoline-compounds-as-potential-antidepressant-agents
#13
Yang Yang, Wei Ang, Haiyue Long, Ying Chang, Zicheng Li, Liangxue Zhou, Tao Yang, Yong Deng, Youfu Luo
A scaffold-hopping strategy toward Agomelatine based on in silico screening and knowledge analysis was employed to design novel antidepressant agents. A series of 3, 4-dihydroisoquinoline compounds were selected for chemical synthesis and biological assessment. Three compounds (6a-1, 6a-2, 6a-9) demonstrated protective effects on corticosterone-induced lesion of PC12 cells. Compound 6a-1 also displayed low inhibitory effects on the growth of HEK293 and L02 normal cells and it was further evaluated for its potential antidepressant effects in vivo...
October 4, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27687768/angiotensin-1-7-abrogates-angiotensin-ii-induced-proliferation-migration-and-inflammation-in-vsmcs-through-inactivation-of-ros-mediated-pi3k-akt-and-mapk-erk-signaling-pathways
#14
Feng Zhang, Xingsheng Ren, Mingxia Zhao, Bing Zhou, Ying Han
The proliferation, migration and inflammation of vascular smooth muscle cells (VSMCs) contribute to the pathogenesis and progression of several cardiovascular diseases such as atherosclerosis and hypertension. Angiotensin (Ang)-(1-7) and Ang II are identified to be involved in regulating cardiovascular activity. The present study is designed to determine the interaction between Ang-(1-7) and Ang II on VSMCs proliferation, migration and inflammation as well as their underlying mechanisms. We found that Ang-(1-7) significantly suppressed the positive effects of Ang II on VSMCs proliferation, migration and inflammation, as well as on induction of the phosphorylation of Akt and ERK1/2 and increase of superoxide anion level and NAD(P)H oxidase activity in VSMCs, whereas Ang-(1-7) alone had no significant effects...
September 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27643158/ish-pre-2-the-vascular-phenotype-in-hypertension-molecular-mechanisms-and-clinical-implications
#15
Rhian M Touyz
Pathophysiological mechanisms contributing to hypertension include endothelial dysfunction and vascular ignalling. These changes are initially adaptive but chronically become maladaptive leading to vascular damage and loss of function. Common to these processes are changes in the characteristics of vascular cells to a pro-infl ammatory, vasoconstrictory and proliferative phenotype, infl uenced by activation of the RAS and oxidative stress. Increased ROS production and decreased cellular antioxidant defense mechanisms, contribute to oxidative stress, which infl uences redox-sensitive Ang II ignalling that promotes vascular injury in hypertension...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27642974/os-15-02-matrix-metalloproteinase-2-knockout-protects-from-angiotensin-ii-induced-vascular-injury-in-part-via-inhibition-of-egfr-and-erk1-2-activation
#16
Pierre Paradis, Tlili Barhoumi, Muhammad Oneeb Rehman Mian, Julio C Fraulob-Aquino, Asia Rehman, Nourredine Idris-Khodja, Ernesto L Schiffrin
OBJECTIVE: Matrix metalloproteinase 2 (MMP2) is involved in cardiovascular disease. Whether MMP2 plays a role in hypertension and vascular damage is unknown. We hypothesized that Mmp2 knockout will prevent angiotensin (Ang) II-induced hypertension and vascular injury. DESIGN AND METHOD: Mmp2 knockout (Mmp2) and wild-type (WT) mice were infused with Ang II (1000 ng/kg/min, SC) for 14 days. Systolic blood pressure (SBP) was measured by telemetry, and mesenteric artery (MA) endothelial function and vascular remodeling by pressurized myography...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27570480/gamma-secretase-inhibitor-prevents-proliferation-and-migration-of-ductus-arteriosus-smooth-muscle-cells-through-the-notch3-hes1-2-5-pathway
#17
Jiunn-Ren Wu, Jwu-Lai Yeh, Shu-Fen Liou, Zen-Kong Dai, Bin-Nan Wu, Jong-Hau Hsu
Patent ductus arteriosus (PDA) can cause morbidity and mortality in neonates. Vascular remodeling, characterized by proliferation and migration of smooth muscle cells (SMCs), is an essential process for postnatal DA closure. Notch signaling is an important mediator of vascular remodelling but its role in DA is unkonwn. We investigated the effects and underlying mechanisms of γ-secretase inhibitor DAPT, a Notch signaling inhibitor on angiotensin II (Ang II)-induced proliferation and migration of DASMCs. Proliferation and migration of DASMCs cultured from neonatal Wistar rats were induced by Ang II, with or without DAPT pre-treatment...
2016: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/27507578/hno-suppresses-lps-induced-inflammation-in-bv-2-microglial-cells-via-inhibition-of-nf-%C3%AE%C2%BAb-and-p38-mapk-pathways
#18
Yebo Zhou, Zhiyuan Wu, Xu Cao, Lei Ding, ZhengShun Wen, Jin-Song Bian
Both hydrogen sulfide (H2S) and nitric oxide (NO) are important gaseous mediators. We and others previously reported that these two gases react with each other to generate a new mediator, nitroxyl (HNO), and regulate cardiovascular functions. In this study, we demonstrated for the first time that the interaction between the two gases also existed in microglia. The biological functions of HNO in microglial cells were further studied with Angeli's salt (AS), an HNO donor. We found that AS attenuated lipopolysaccharide (LPS)-evoked production of reactive oxygen species (ROS) and pro-inflammatory cytokines (e...
September 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27506987/blackberry-raspberry-and-black-raspberry-polyphenol-extracts-attenuate-angiotensin-ii-induced-senescence-in-vascular-smooth-muscle-cells
#19
Rafaela G Feresin, Jingwen Huang, DawnKylee S Klarich, Yitong Zhao, Shirin Pourafshar, Bahram H Arjmandi, Gloria Salazar
Activation of angiotensin II (Ang II) signaling during aging increases reactive oxygen species (ROS) leading to vascular senescence, a process linked to the onset and progression of cardiovascular diseases (CVD). Consumption of fruits and vegetables, particularly berries, is associated with decreased incidence of CVD, which has mainly been attributed to the polyphenol content of these foods. Thus, the objective of this study was to investigate the role of blackberry (BL), raspberry (RB), and black raspberry (BRB) polyphenol extracts in attenuating Ang II-induced senescence in vascular smooth muscle cells (VSMCs) and to determine the molecular mechanisms involved...
October 12, 2016: Food & Function
https://www.readbyqxmd.com/read/27492718/epigallocatechin-3-gallate-inhibits-angiotensin-ii-induced-c-reactive-protein-generation-through-interfering-with-the-at1-ros-erk1-2-signaling-pathway-in-hepatocytes
#20
Jingjing Zhao, Juntian Liu, Xiaoming Pang, Xiaolu Zhang, Shuyue Wang, Di Wu
Inflammation plays a key role in many chronic diseases such as cardiovascular diseases and liver diseases. As a representative inflammatory molecule, C-reactive protein (CRP) is mainly produced in the liver. Hepatic CRP plays a direct role in the inflammatory hepatic diseases and in development of atherosclerosis when entering into the blood circulation. In the present study, we observed the effect of epigallocatechin-3-gallate (EGCG) on Ang II-induced CRP generation in hepatocytes and the molecular mechanism...
November 2016: Naunyn-Schmiedeberg's Archives of Pharmacology
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