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Angiotensin 2 AND ROS

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https://www.readbyqxmd.com/read/29155324/angiotensin-receptor-blocker-irbesartan-reduces-stress-induced-intestinal-inflammation-via-at1a-signaling-and-ace2-dependent-mechanism-in-mice
#1
Maimaiti Yisireyili, Yasuhiro Uchida, Koji Yamamoto, Takayuki Nakayama, Xian Wu Cheng, Tadashi Matsushita, Shigeo Nakamura, Toyoaki Murohara, Kyosuke Takeshita
Stress is associated with pathophysiology of both irritable bowel syndrome (IBS) and hypertension. Angiotensin receptor blockers (ARB) have anti-inflammatory properties via inhibition of angiotensin II (Ang II)/Ang II type I receptor axis (AT1). Inhibition of the classical RAS pathway is also involved in upregulation of angiotensin converting enzyme-2 (ACE2), which activates the Ang-(1-7) /Mas pathway to counteract inflammatory signaling and acts as a partner of the amino acid transporter, B(0)AT-1, to absorb tryptophan for regulation of microbiota-gut-brain axis...
November 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29115506/angiotensin-ii-induces-monocyte-chemoattractant-protein%C3%A2-1-expression-by-increasing-reactive-oxygen-species%C3%A2-mediated-activation-of-the-nuclear-factor%C3%A2-%C3%AE%C2%BAb-signaling-pathway-in-osteoblasts
#2
Changyao Wang, Cailong Zhang, Feng Zhou, Lei Gao, Yingzhen Wang, Chunsheng Wang, Yongtao Zhang
The present study investigated the effect of angiotensin II (Ang II) on monocyte chemoattractant protein‑1 (MCP‑1) expression and the underlying mechanism in osteoblasts. MCP‑1 expression levels were analyzed by ELISA and reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR). Ang II type 1 receptor (AT1R) expression levels was examined by RT‑qPCR, western blotting and immunostaining. In addition, the nuclear factor (NF)‑κB signaling pathway was investigated via western blot analysis...
November 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29098619/the-positive-effects-of-exercise-in-chemotherapy-related-cardiomyopathy
#3
Cavarretta Elena, Mastroiacovo Giorgio, Lupieri Annik, Frati Giacomo, Peruzzi Mariangela
Anthracyclines such as doxorubicin, daunorubicin, epirubicin, mitoxantrone and idarubicin, are powerful chemotherapeutic drugs used both in children and adult populations. Their properties made them particularly suitable for a large variety of neoplasms including breast adenocarcinoma, small cell lung cancer and acute leukemia. Early and late anthracycline-induced cardiotoxicity is a well-known phenomenon, and the incidence of heart failure in patients receiving doxorubicin is 2.2%, with a mortality rate over 60% at 2 years...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29032115/toll-like-receptor-4-tlr4-impairs-nitric-oxide-contributing-to-angiotensin-ii-induced-cavernosal-dysfunction
#4
Kenia P Nunes, Gisele F Bomfim, Haroldo A Toque, Theodora Szasz, R Clinton Webb
AIM: Angiotensin II (AngII), a corpus cavernosum (CC) constrictor peptide, modulates Toll like receptor (TLR) expression, a key element of the innate immune system, contributing to impaired vascular function in pathological conditions. However, it is unknown whether TLR4 is involved in AngII-induced erectile dysfunction. In this study, we investigated whether TLR4 plays a role in cavernosal dysfunction caused by AngII upregulation. MATERIAL AND METHODS: Cavernosal smooth muscle cells (CSMC) from C57/BL6 mice were treated with AngII (0...
October 12, 2017: Life Sciences
https://www.readbyqxmd.com/read/28987480/egg-white-derived-peptides-prevent-cardiovascular-disorders-induced-by-mercury-in-rats-role-of-angiotensin-converting-enzyme-ace-and-nadph-oxidase
#5
Danize Aparecida Rizzetti, Ángela Martín, Patricia Corrales, Francisca Fernandez, Maylla Ronacher Simões, Franck Maciel Peçanha, Dalton Valentim Vassallo, Marta Miguel, Giulia Alessandra Wiggers
The study aimed to investigate the effects of egg white hydrolysate (EWH) on vascular disorders induced by mercury (Hg). For this, male Wistar rats were treated for 60days: Untreated (saline, i.m.); Mercury (HgCl2, i.m., 1st dose 4.6μg/kg, subsequent doses 0.07μg/kg/day); Hydrolysate (EWH, gavage, 1g/kg/day); Hydrolysate-Mercury. Systolic (SBP) and diastolic (DBP) blood pressure measurement and vascular reactivity experiments in aorta were performed. We analyzed endothelial dependent and independent vasodilator responses and vasoconstrictor response to phenylephrine (Phe) in absence and presence of endothelium, a NOS inhibitor, a NADPH oxidase inhibitor, the superoxide dismutase, a non-selective COX inhibitor, a selective COX-2 inhibitor, an AT-1 receptors blocker...
November 5, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28978980/role-of-bardoxolone-methyl-a-nuclear-factor-erythroid-2-related-factor-2-activator-in-aldosterone-and-salt-induced-renal-injury
#6
Mikako Hisamichi, Atsuko Kamijo-Ikemori, Takeshi Sugaya, Seiko Hoshino, Kenjiro Kimura, Yugo Shibagaki
The aim of this study was to investigate the renoprotective effect of bardoxolone methyl (BM), a nuclear factor erythroid 2-related factor 2 (Nrf2) activator with an antioxidant effect, in a salt-sensitive hypertension model induced by aldosterone (Ald) and salt. Tubulointerstitial damage with urinary liver-type fatty acid-binding protein (L-FABP) was evaluated using human L-FABP chromosomal transgenic (L-FABP(+/-)) male mice. The mice in the Ald group (n=7) received systemic Ald infusions via an osmotic minipump and were given 1% NaCl water for 35 days...
October 5, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28939023/vascular-protective-effects-of-aqueous-extracts-of-tribulus-terrestris-on-hypertensive-endothelial-injury
#7
Yue-Hua Jiang, Jin-Hao Guo, Sai Wu, Chuan-Hua Yang
Angiotensin II (Ang II) is involved in endothelium injury during the development of hypertension. Tribulus terrestris (TT) is used to treat hypertension, arteriosclerosis, and post-stroke syndrome in China. The present study aimed to determine the effects of aqueous TT extracts on endothelial injury in spontaneously hypertensive rats (SHRs) and its protective effects against Ang II-induced injury in human umbilical vein endothelial cells (HUVECs). SHRs were administered intragastrically with TT (17.2 or 8.6 g·kg(-1)·d(-1)) for 6 weeks, using valsartan (13...
August 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/28938442/angiotensin-ii-causes-%C3%AE-cell-dysfunction-through-an-er-stress-induced-proinflammatory-response
#8
Stanley M H Chan, Yeh-Siang Lau, Alyson A Miller, Jacqueline M Ku, Simon Potocnik, Ji-Ming Ye, Owen L Woodman, Terence P Herbert
The metabolic syndrome is associated with an increase in the activation of the renin angiotensin system, whose inhibition reduces the incidence of new-onset diabetes. Importantly, angiotensin II (AngII), independently of its vasoconstrictor action, causes β-cell inflammation and dysfunction, which may be an early step in the development of type 2 diabetes. The aim of this study was to determine how AngII causes β-cell dysfunction. Islets of Langerhans were isolated from C57BL/6J mice that had been infused with AngII in the presence or absence of taurine-conjugated ursodeoxycholic acid (TUDCA) and effects on endoplasmic reticulum (ER) stress, inflammation, and β-cell function determined...
October 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28931548/fluid-replacement-modulates-oxidative-stress-but-not-nitric-oxide-mediated-cutaneous-vasodilation-and-sweating-during-prolonged-exercise-in-the-heat
#9
Brendan D McNeely, Robert D Meade, Naoto Fujii, Andrew J E Seely, Ronald J Sigal, Glen P Kenny
The roles of nitric oxide synthase (NOS), reactive oxygen species (ROS) and angiotensin II type 1 receptor (AT1R) activation in regulating cutaneous vasodilation and sweating during prolonged (≥60 min) exercise are currently unclear. Moreover, it remains to be determined whether fluid replacement (FR) modulates the above thermoeffector responses. To investigate, eleven young men completed 90-min of continuous moderate intensity (46% of VO2peak) cycling performed at a fixed rate of metabolic heat production of 600 W (No-FR condition)...
September 20, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28916337/angiotensin-ii-induces-calcium-mediated-autophagy-in-podocytes-through-enhancing-reactive-oxygen-species-levels
#10
Na Gao, Hui Wang, Hongqiang Yin, Zhuo Yang
As well known, abnormalities of Angiotensin II (Ang II) is closely related with glomerular damage. This study was to investigate whether Ang II could affect autophagy in podocytes via oxidative stress, and whether autophagy had a positive role in protecting podocytes impaired by Ang II. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay showed that Ang II induced podocyte death. The measurements of malondialdehyde (MDA) and H2O2 levels, and flow cytometry assay revealed that Ang II considerably increased reactive oxygen species (ROS) generation in podocytes...
November 1, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28884281/angiotensin-receptor-blockade-by-inhibiting-glial-activation-promotes-hippocampal-neurogenesis-via-activation-of-wnt-%C3%AE-catenin-signaling-in-hypertension
#11
Shahnawaz Ali Bhat, Ruby Goel, Shubha Shukla, Rakesh Shukla, Kashif Hanif
Hypertension is one of the major risk factors for central nervous system (CNS) disorders like stroke and Alzheimer's disease (AD). On the other hand, CNS diseases like AD have been associated with gliosis and impaired neurogenesis. Further, renin angiotensin system (RAS) is intricately associated with hypertension; however, the accumulating evidences suggest that over-activity of RAS may perpetuate the brain inflammation related with AD. Therefore, in the present study, we examined the effect of hypertension and RAS on glial (astrocytes and microglia) activation and hippocampal neurogenesis in a rat model of chronic hypertension...
September 7, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28857948/suppression-of-oxidative-stress-and-apoptosis-in-electrically-stimulated-neonatal-rat-cardiomyocytes-by-resveratrol-and-underlying-mechanisms
#12
Liqi Ge, Zhirong Wang, Chengzong Li, Yao Zhang, Lei Chen
PURPOSE: We explored effects of resveratrol on oxidative stress in cardiomyocytes subjected to rapid electrical stimulation (RES) and also investigated underlying mechanisms. METHODS: Neonatal rat ventricular myocytes cultured were subjected to RES at 4.0 Hz, with or without resveratrol, an NADPH oxidase inhibitor apocyanin (APO) or a Ca/calmodulin dependent protein kinase II (CaMKII) inhibitor autocamtide-2-inhibitory peptide (AIP). Cell counts, to optimize resveratrol concentration, and angiotensin II content were evaluated...
August 18, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28840773/prorenin-receptor-prr-mediated-nadph-oxidase-nox-signaling-regulates-vegf-synthesis-under-hyperglycemic-condition-in-arpe-19-cells
#13
Rashidul Haque, P Michael Iuvone, Li He, Elizabeth H Hur, Kimberly Su Chung Choi, Daniel Park, Annie N Farrell, Ashley Ngo, Samantha Gokhale, Madiha Aseem, Bhavna Kumar
The stimulation of angiotensin II (Ang II), the effector peptide of renin-angiotensin system, has been reported to increase the expression of vascular endothelial growth factor (VEGF) through the activation of the Ang II type 1 receptor (AT1R). In this study, we investigated whether hyperglycemia (HG, 33 mM glucose) in ARPE-19 cells could promote the expression of VEGF independently of Ang II through prorenin receptor (PRR), via an NADPH oxidase (Nox)-dependent mechanism. ARPE-19 cells were treated with the angiotensin converting enzyme (ACE) inhibitor perindopril to block the synthesis of Ang II...
August 25, 2017: Journal of Receptor and Signal Transduction Research
https://www.readbyqxmd.com/read/28814529/selective-hif-1-regulation-under-nonhypoxic-conditions-by-the-p42-p44-map-kinase-inhibitor-pd184161
#14
Maroua Jalouli, Sophie Mokas, Catherine A Turgeon, Laurent Lamalice, Darren E Richard
Hypoxia-inducible factor-1 (HIF-1) is a key gene regulator for cellular adaptation to low oxygen. In addition to hypoxia, several nonhypoxic stimuli, including hormones and growth factors, are essential for cell-specific HIF-1 regulation. Our studies have highlighted angiotensin II (AngII), a vasoactive hormone, as a potent HIF-1 activator in vascular smooth muscle cells (VSMC). AngII increases HIF-1 transcriptional activity by modulating specific signaling pathways. In VSMC, p42/p44 mitogen-activated protein kinase (MAPK) pathway activation is essential for HIF-1-mediated transcription during AngII treatment...
November 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28770648/effect-of-uric-acid-on-inflammatory-cox-2-and-ros-pathways-in-vascular-smooth-muscle-cells
#15
Nurgül Oğuz, Mustafa Kırça, Arzu Çetin, Akın Yeşilkaya
Hyperuricemia is thought to play a role in cardiovascular diseases (CVD), including hypertension, coronary artery disease and atherosclerosis. However, exactly how uric acid contributes to these pathologies is unknown. An underlying mechanism of inflammatory diseases, such as atherosclerosis, includes enhanced production of cyclooxygenase-2 (COX-2) and superoxide anion. Here, we aimed to examine the effect of uric acid on inflammatory COX-2 and superoxide anion production and to determine the role of losartan...
October 2017: Journal of Receptor and Signal Transduction Research
https://www.readbyqxmd.com/read/28711865/enhanced-mitochondrial-transient-receptor-potential-channel-canonical-type-3-mediated-calcium-handling-in-the-vasculature-from-hypertensive-rats
#16
Bin Wang, Shiqiang Xiong, Shaoyang Lin, Weijie Xia, Qiang Li, Zhigang Zhao, Xing Wei, Zongshi Lu, Xiao Wei, Peng Gao, Daoyan Liu, Zhiming Zhu
BACKGROUND: Mitochondrial Ca(2+) homeostasis is fundamental to the regulation of mitochondrial reactive oxygen species (ROS) generation and adenosine triphosphate production. Recently, transient receptor potential channel, canonical type 3 (TRPC3), has been shown to localize to the mitochondria and to play a role in maintaining mitochondrial calcium homeostasis. Inhibition of TRPC3 attenuates vascular calcium influx in spontaneously hypertensive rats (SHRs). However, it remains elusive whether mitochondrial TRPC3 participates in hypertension by increasing mitochondrial calcium handling and ROS production...
July 15, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28678311/regulation-of-mir-92a-on-vascular-endothelial-aging-via-mediating-nrf2-keap1-are-signal-pathway
#17
H Liu, H-Y Wu, W-Y Wang, Z-L Zhao, X-Y Liu, L-Y Wang
OBJECTIVE: Various human aging-related diseases start with vascular aging, in which the aging of vascular endothelium is the first step to cause a structural and functional deficit of vascular endothelium, leading to vascular disorders. MicroRNA (miR) participates in various processes of body development and pathological processes via mediating cell proliferation, differentiation, and apoptosis. A previous study showed the correlation between cardiovascular disease and miR-92a, whose role and mechanism in vascular endothelial aging has not been reported...
June 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28653133/dysregulation-of-cerebellar-adrenomedullin-signaling-during-hypertension
#18
Leticia Figueira, Anita Israel
Adrenomedullin (AM) is a peptide involved in blood pressure regulation. AM activates three different receptors, the AM type 1 (AM1), type 2 (AM2), and calcitonin gene-related peptide 1 (CGRP1) receptors. AM triggers several signaling pathways such as adenylyl cyclase (AC), guanylyl cyclase (GC), and extracellular signal-regulated kinases (ERK) and modulates reactive oxygen species (ROS) metabolism. Cerebellar AM, AM-binding sites, and its receptor components are altered during hypertension, although it is unknown if these alterations are associated with changes in AM signaling...
August 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28636532/a-novel-pan-nox-inhibitor-apx-115-protects-kidney-injury-in-streptozotocin-induced-diabetic-mice-possible-role-of-peroxisomal-and-mitochondrial-biogenesis
#19
Guideock Kwon, Md Jamal Uddin, Gayoung Lee, Songling Jiang, Ahreum Cho, Jung Hwa Lee, Sae Rom Lee, Yun Soo Bae, Sung Hwan Moon, Soo Jin Lee, Dae Ryong Cha, Hunjoo Ha
NADPH oxidase (Nox)-derived reactive oxygen species (ROS) are increasingly recognized as a key factor in inflammation and extracellular matrix accumulation in diabetic kidney disease. APX-115 (3-phenyl-1-(pyridin-2-yl)-4-propyl-1-5-hydroxypyrazol HCl) is a novel orally active pan-Nox inhibitor. The objective of this study was to compare the protective effect of APX-115 with a renin-angiotensin system inhibitor (losartan), the standard treatment against kidney injury in diabetic patients, on streptozotocin (STZ)-induced diabetic kidney injury...
June 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28630660/npc-exs-alleviate-endothelial-oxidative-stress-and-dysfunction-through-the-mir-210-downstream-nox2-and-vegfr2-pathways
#20
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
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