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Angiotensin 2 AND ROS

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https://www.readbyqxmd.com/read/29710494/novel-angiotensin-receptor-blocker-azilsartan-induces-oxidative-stress-and-nfkb-mediated-apoptosis-in-hepatocellular-carcinoma-cell-line-hepg2
#1
Elham Ahmadian, Ahmad Yari Khosroushahi, Aziz Eftekhari, Safar Farajnia, Hossein Babaei, Mohammad Ali Eghbal
Overexpression of renin angiotensin system (RAS) components and nuclear factor-kappa B (NF-kB) has a key role in various cancers. Blockade of RAS and NF-kB pathway has been suggested to reduce cancer cell proliferation. This study aimed to investigate the role of angiotensin II and NF-kB pathway in liver hepatocellular carcinoma cell line (HepG2) proliferation by using azilsartan (as a novel Ag II antagonist) and Bay 11-7082 (as NF-kB inhibitor). HepG2 cells were treated with different concentrations of azilsartan and Bay 11-7082...
March 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29704740/tanshinone-iia-protects-against-subclinical-lipopolysaccharide-induced-cardiac-fibrosis-in-mice-through-inhibition-of-nadph-oxidase
#2
Libing Huang, Juan Zhu, Man Zheng, Rong Zou, Yudi Zhou, Minghui Zhu
Myocardial fibrosis plays a central role in the development of heart failure. It has been shown that recurrent exposure to subclinical lipopolysaccharide (LPS) increases mortality and induces cardiac fibrosis in mice, which is not mediated by the common renin-angiotensin system. LPS increased NADPH oxidase2 (NOX2) in isolated adult mouse cardiac fibroblasts and NOX2 may mediate LPS-induced cardiac fibrosis. Therefore, the current study was designed to delineate the role of NOX2 in LPS-induced fibrosis model and to investigate the preventive role of Tanshinone IIA (TIIA) on the development of cardiac fibrosis...
April 25, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29682576/effects-of-pravastatin-on-type-1-diabetic-rat-heart-with-or-without-blood-glycemic-control
#3
Jeong Jin Min, Byung-Seop Shin, Jong-Hwan Lee, Yunseok Jeon, Dae Kyun Ryu, Sojin Kim, Young Hee Shin
Although statins have been suggested to attenuate the progression of diabetic cardiomyopathy, its effect without glycemic control remains unclear. Therefore, we evaluated the effect of pravastatin on diabetic rat hearts according to glycemic control. Rats were randomly divided into five groups: control (C), diabetes (D), diabetes with insulin (I), diabetes with pravastatin (P), and diabetes with insulin and pravastatin (IP). Eight weeks after allocated treatments, the heart was extracted and analyzed following echocardiography...
2018: Journal of Diabetes Research
https://www.readbyqxmd.com/read/29664131/anti-fibrotic-actions-of-ghrelin-by-inhibition-of-the-nadph-oxidase-ros-signaling-pathway
#4
Qian Wang, Xin Sui, Rui Chen, Peiyong Ma, Tao Ding, Dianjun Sui, Ping Yang
This study aims to investigate whether the molecular mechanisms by which Ghrelin inhibits cardiac fibrosis are linked to the NADPH oxidase-ROS signaling pathway. Adult male Sprague Dawley (SD) rats were randomly divided into 4 groups: sham, myocardial infarction (MI), MI + Ghrelin (100 μg/kg, twice daily, subcutaneous for 4 weeks beginning 24 h post-MI), or Ghrelin alone. Adult rat cardiac fibroblasts (CFs) were isolated and pretreated with or without Ghrelin for 24 h, followed by stimulation with or without angiotensin II (Ang II) for another 24 h...
April 17, 2018: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29657902/inhibitory-effects-of-angiotensin-ii-receptor-blockade-on-human-tenon-fibroblast-migration-and-reactive-oxygen-species-production-in-cell-culture
#5
Duri Kim, Ushasree Pattamatta, Elizabeth Kelly, Paul R Healey, Nicole Carnt, Hans Zoellner, Andrew J R White
Purpose: We investigate the effect of angiotensin receptor blockade on the migration of human Tenon fibroblasts (HTF), using irbesartan, an angiotensin II receptor type 1 (AT1R) blocker (ARB) as a potential antifibrotic agent in glaucoma filtration surgery. Methods: Confluent HTF cultures were scratched with a 1 mL pipette tip and treated with either irbesartan (10, 50, and 100 μg/mL) or angiotensin II (2 μg/mL). The extent of HTF migration up to 30 hours, and cell number and morphology at 72 hours was evaluated...
April 2018: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/29656391/proteomic-analysis-of-sperm-proteins-in-infertile-men-with-high-levels-of-reactive-oxygen-species
#6
A Ayaz, A Agarwal, R Sharma, N Kothandaraman, Z Cakar, S Sikka
Oxidative stress is a significant risk factor for male infertility. A pro-oxidant testicular environment may alter the expression profile of functional sperm proteins and result in poor sperm quality. Patients and donors were divided into ROS (-) and ROS (+) groups. Using computational studies, and data mining of available literature on spermatozoa, oxidative stress and proteomics, we identified three core regulatory proteins angiotensin-converting enzyme (ACE), heat-shock protein (Hsp70) family A member 2 (HSPA2) and ribosomal protein subunit 27A (RPS27A) and seven interlink proteins NOS2, SUMO2, UBL4A, FBXO25, MAP3K3, APP and UBC...
April 15, 2018: Andrologia
https://www.readbyqxmd.com/read/29501491/blockage-of-akap12-accelerates-angiotensin-ii-ang-ii-induced-cardiac-injury-in-mice-by-regulating-the-transforming-growth-factor-%C3%AE-1-tgf-%C3%AE-1-pathway
#7
Yong Li, Qiu-Hua Yu, Ying Chu, Wei-Min Wu, Jian-Xiang Song, Xiao-Bo Zhu, Qiang Wang
Hypertension is a multifactorial chronic inflammatory disease that leads to cardiac remodeling. A-kinase anchor protein 12 (AKAP12) is a scaffolding protein that has multiple functions in various biological events, including the regulation of vessel integrity and differentiation of neural barriers in blood. However, the role of AKAP12 in angiotensin II (Ang II)-induced cardiac injury remains unclear. In the present study, Ang II infusion reduced AKAP12 expressions in the hearts of wild-type (WT) mice, and AKAP12 knockout (KO) enhanced the infiltration of inflammatory cells...
May 5, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29486589/autophagy-attenuates-angiotensin-ii-induced-pulmonary-fibrosis-by-inhibiting-redox-imbalance-mediated-nod-like-receptor-family-pyrin-domain-containing-3-inflammasome-activation
#8
Ying Meng, Miaoxia Pan, Bojun Zheng, Yan Chen, Wei Li, Qianjie Yang, Zemao Zheng, Nana Sun, Yue Zhang, Xu Li
AIMS: The NOD-like receptor family pyrin domain containing 3 (NLRP3) inflammasome, which is activated by reactive oxygen species (ROS) and repressed by autophagy, has been identified as a novel agent of pulmonary fibrosis. Angiotensin II (AngII), the bioactive pro-oxidant in the renin-angiotensin system, aggravates lung fibrosis. However, the effect of AngII on NLRP3 inflammasome and autophagy in lung fibrosis remains unknown. This study investigates the potential link between AngII-induced autophagy in the regulation of NLRP3 inflammasome/IL-1β axis in lung fibrosis...
May 7, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29472601/reactive-oxygen-species-mediate-the-suppression-of-arterial-smooth-muscle-t-type-ca-2-channels-by-angiotensin-ii
#9
Ahmed M Hashad, Maria Sancho, Suzanne E Brett, Donald G Welsh
Vascular T-type Ca2+ channels (CaV 3.1 and CaV 3.2) play a key role in arterial tone development. This study investigated whether this conductance is a regulatory target of angiotensin II (Ang II), a vasoactive peptide that circulates and which is locally produced within the arterial wall. Patch clamp electrophysiology performed on rat cerebral arterial smooth muscle cells reveals that Ang II (100 nM) inhibited T-type currents through AT1 receptor activation. Blocking protein kinase C failed to eliminate channel suppression, a finding consistent with unique signaling proteins enabling this response...
February 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29463644/the-inositol-requiring-enzyme-1-ire1%C3%AE-rnase-inhibitor-4%C3%A2%C2%B58c-is-also-a-potent-cellular-antioxidant
#10
Stanley M H Chan, Mark P Lowe, Ashton Bernard, Alyson A Miller, Terence P Herbert
Inositol-requiring enzyme 1 alpha (IRE1α) is an endoplasmic reticulum (ER)-transmembrane endonuclease that is activated in response to ER stress as part of the unfolded protein response (UPR). Chronic activation of the UPR has been implicated in the pathogenesis of many common diseases including diabetes, cancer, and neurological pathologies such as Huntington's and Alzheimer's disease. 7-Hydroxy-4-methyl-2-oxo-2H-chromene-8-carbaldehyde (4µ8C) is widely used as a specific inhibitor of IRE1α ribonuclease activity (IC50 of 6...
March 9, 2018: Biochemical Journal
https://www.readbyqxmd.com/read/29456586/dietary-canolol-protects-the-heart-against-the-deleterious-effects-induced-by-the-association-of-rapeseed-oil-vitamin-e-and-coenzyme-q10-in-the-context-of-a-high-fat-diet
#11
Thibault Leger, Isabelle Hininger-Favier, Frédéric Capel, Alain Geloen, Jean-Paul Rigaudière, Chrystèle Jouve, Elodie Pitois, Gaelle Pineau, Carole Vaysse, Jean-Michel Chardigny, Marie-Caroline Michalski, Corinne Malpuech-Brugère, Luc Demaison
Background: Obesity progressively leads to cardiac failure. Omega-3 polyunsaturated fatty acids (PUFA) have been shown to have cardio-protective effects in numerous pathological situations. It is not known whether rapeseed oil, which contains α-linolenic acid (ALA), has a similar protective effect. Omega-3 PUFAs are sensitive to attack by reactive oxygen species (ROS), and lipid peroxidation products could damage cardiac cells. We thus tested whether dietary refined rapeseed oil (RSO) associated with or without different antioxidants (vitamin E, coenzyme Q10 and canolol) is cardio-protective in a situation of abdominal obesity...
2018: Nutrition & Metabolism
https://www.readbyqxmd.com/read/29453988/silencing-calreticulin-gene-might-protect-cardiomyocytes-from-angiotensin-ii-induced-apoptosis
#12
Wen Zhang, Zhiyue Liu, Yanmei Zhang, Qinxue Bao, Wenchao Wu, He Huang, Xiaojing Liu
AIMS: Calreticulin (CRT), as a chaperone, contributes to protein folding and quality control cycle. CRT is an important factor regulating Ca2+ that participates in cell apoptosis. However, the function of CRT in the heart is still controversial. Therefore, we aimed to investigate the potential role of CRT in angiotensin II-induced cardiomyocytes apoptosis. MAIN METHODS: Primary cultured neonatal cardiomyocytes were stimulated with angiotensin II to induce the apoptosis...
April 1, 2018: Life Sciences
https://www.readbyqxmd.com/read/29363860/ace2-epc-exs-protect-ageing-ecs-against-hypoxia-reoxygenation-induced-injury-through-the-mir-18a-nox2-ros-pathway
#13
Cheng Zhang, Jinju Wang, Xiaotang Ma, Wenjun Wang, Bin Zhao, Yanfang Chen, Can Chen, Ji C Bihl
Oxidative stress is one of the mechanisms of ageing-associated vascular dysfunction. Angiotensin-converting enzyme 2 (ACE2) and microRNA (miR)-18a have shown to be down-regulated in ageing cells. Our previous study has shown that ACE2-primed endothelial progenitor cells (ACE2-EPCs) have protective effects on endothelial cells (ECs), which might be due to their released exosomes (EXs). Here, we aimed to investigate whether ACE2-EPC-EXs could attenuate hypoxia/reoxygenation (H/R)-induced injury in ageing ECs through their carried miR-18a...
March 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29351466/telomerase-reverse-transcriptase-protects-against-angiotensin-ii-induced-microvascular-endothelial-dysfunction
#14
Karima Ait-Aissa, Andrew O Kadlec, Joseph Hockenberry, David D Gutterman, Andreas M Beyer
A rise in reactive oxygen species (ROS) may contribute to cardiovascular disease by reducing nitric oxide (NO) levels, leading to loss of NO's vasodilator and anti-inflammatory effects. Although primarily studied in the larger conduit arteries, excess ROS release and a corresponding loss of NO also occurs in the smaller resistance arteries of the microcirculation, but underlying mechanisms and therapeutic targets have not been fully characterized. We examined whether either of the two subunits of telomerase, telomerase reverse transcriptase (TERT) or telomerase RNA component (TERC), affect microvascular ROS production and peak vasodilation at baseline and in response to in vivo administration to angiotensin II (ANG II)...
December 22, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29277292/resveratrol-attenuates-hyperproliferation-of-vascular-smooth-muscle-cells-from-spontaneously-hypertensive-rats-role-of-ros-and-ros-mediated-cell-signaling
#15
Sara Almajdoob, Ekhtear Hossain, Madhu B Anand-Srivastava
Resveratrol, a natural polyphenolic compound has been reported to attenuate angiotensin II -induced vascular smooth muscle cell (VSMC) hypertrophy; however, whether resveratrol could also inhibit hyperproliferation of VSMC from spontaneously hypertensive rats (SHR) is unexplored. The present study investigates the effect of resveratrol on hyperproliferation of VSMC from SHR and the underlying molecular mechanisms responsible for this response. For these studies, aortic VSMC from SHR and Wistar-Kyoto (WKY) rats were used...
February 2018: Vascular Pharmacology
https://www.readbyqxmd.com/read/29248456/endothelin-2-injures-the-blood-retinal-barrier-and-macroglial-m%C3%A3-ller-cells-interactions-with-angiotensin-ii-aldosterone-and-nadph-oxidase
#16
Saeed F Alrashdi, Devy Deliyanti, Dean M Talia, Jennifer L Wilkinson-Berka
Although increasing evidence indicates that endothelin-2 (Edn2) has distinct roles in tissue pathology, including inflammation, glial cell dysfunction, and angiogenesis, its role in the retina and the factors that regulate its actions are not fully understood. We hypothesized that Edn2 damages the blood-retinal barrier (BRB) and that this is mediated by interactions with the renin-angiotensin-aldosterone system and reactive oxygen species derived from NADPH oxidase (Nox). C57BL/6J mice received an intravitreal injection of Edn2 or control vehicle to examine the blood pressure-independent effects of Edn2...
March 2018: American Journal of Pathology
https://www.readbyqxmd.com/read/29167164/nrf2-prevents-hypertension-increased-adma-microvascular-oxidative-stress-and-dysfunction-in-mice-with-two-weeks-of-ang-ii-infusion
#17
Cheng Wang, Zaiming Luo, Gabriella Carter, Anton Wellstein, Pedro A Jose, James Tomlinson, James Leiper, William J Welch, Christopher S Wilcox, Dan Wang
Nuclear factor erythyroid factor 2 (Nrf2) transcribes genes in cultured endothelial cells that reduce reactive oxygen species (ROS) and generate nitric oxide (NO) or metabolize asymmetric dimethylarginine (ADMA), which inhibits NO synthase (NOS). Therefore, we undertook a functional study to test the hypothesis that activation of Nrf2 by tert-butylhydroquinone (tBHQ) preserves microvascular endothelial function during oxidative stress. Wild-type CB57BL/6 (wt), Nrf2 wt (+/+), or knockout (-/-) mice received vehicle (Veh) or tBHQ (0...
March 1, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29155324/angiotensin-receptor-blocker-irbesartan-reduces-stress-induced-intestinal-inflammation-via-at1a-signaling-and-ace2-dependent-mechanism-in-mice
#18
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, B0 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
#19
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...
January 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29098619/the-positive-effects-of-exercise-in-chemotherapy-related-cardiomyopathy
#20
Elena Cavarretta, Giorgio Mastroiacovo, Annik Lupieri, Giacomo Frati, Mariangela Peruzzi
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
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