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https://www.readbyqxmd.com/read/27889753/renal-denervation-attenuates-multi-organ-fibrosis-and-improves-vascular-remodeling-in-rats-with-transverse-aortic-constriction-induced-cardiomyopathy
#1
Kai Wang, Dasheng Lu, Bin Zhang, Shengchan Wang, Qian Liu, Qi Zhang, Jie Geng, Qijun Shan
BACKGROUND/AIMS: To investigate the effects of renal denervation (RDN) on multi-organ fibrosis and vascular remodeling in cardiomyopathy. METHODS: Thirty-six male Sprague-Dawley rats underwent transverse aortic constriction (TAC). Five weeks later, 28 surviving TAC rats were randomly assigned to three groups: (1) RDN, (2) Sham, (3) Carvedilol. Six male Sham TAC rats served as the Control. Ten weeks after TAC, samples were collected. RESULTS: TAC rats showed an increased diastolic interventricular septal thickness at week 5...
November 25, 2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/26554848/cardiac-stem-cells-transplantation-enhances-the-expression-of-connexin-43-via-the-ang-ii-at1r-tgf-beta1-signaling-pathway-in-a-rat-model-of-myocardial-infarction
#2
Jingying Hou, Ping Yan, Tianzhu Guo, Yue Xing, Shaoxin Zheng, Changqing Zhou, Hui Huang, Huibao Long, Tingting Zhong, Quanhua Wu, Jingfeng Wang, Tong Wang
BACKGROUND: In this study, we hypothesized that CSCs mediated the expression of Cx43 after transplantation post MI via the ANG II/AT1R/TGF-beta1 signaling pathway. METHODS: Myocardial infarction (MI) was induced in twenty male Sprague-Dawley rats. The rats were randomized into two groups and were then received the injection of 5 × 10(6) CSCs labeled with PKH26 in phosphate buffer solution (PBS) or equal PBS alone into the infarct anterior ventricular free wall two weeks after MI...
December 2015: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/26497614/a-critical-role-of-cardiac-fibroblast-derived-exosomes-in-activating-renin-angiotensin-system-in-cardiomyocytes
#3
Linmao Lyu, Hui Wang, Bin Li, Qingyun Qin, Lei Qi, Mitzi Nagarkatti, Prakash Nagarkatti, Joseph S Janicki, Xing Li Wang, Taixing Cui
Chronic activation of the myocardial renin angiotensin system (RAS) elevates the local level of angiotensin II (Ang II) thereby inducing pathological cardiac hypertrophy, which contributes to heart failure. However, the precise underlying mechanisms have not been fully delineated. Herein we report a novel paracrine mechanism between cardiac fibroblasts (CF)s and cardiomyocytes whereby Ang II induces pathological cardiac hypertrophy. In cultured CFs, Ang II treatment enhanced exosome release via the activation of Ang II receptor types 1 (AT1R) and 2 (AT2R), whereas lipopolysaccharide, insulin, endothelin (ET)-1, transforming growth factor beta (TGFβ)1 or hydrogen peroxide did not...
December 2015: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/26080922/-renal-sympathetic-denervation-suppresses-ventricular-substrate-remodeling-in-a-canine-high-rate-pacing-model
#4
Xiaozhan Wang, Qingyan Zhao, Shengbo Yu, Xule Wang, Jinping Xiao, Zixuan Dai, He Huang, Yanhong Tang, Congxin Huang
OBJECTIVE: To explore the role of renal sympathetic denervation (RSD) on ventricular substrate remodeling in dogs with pacing-induced heart failure (HF). METHODS: A total of 19 dogs were randomized into 3 groups of sham-operated control (n = 7), right ventricular pacing induction of HF (n = 6) and RSD (n = 6). After 8-week pacing induction of HF. Hemodynamic variables were monitored at baseline and after HF. Masson's trichrome staining, enzyme-linked immunosorbent assay (ELISA) and Western blot were used to measure ventricular interstitial fibrosis, brain natriuretic peptide (BNP), angiotensin II (Ang II), aldosterone and transforming growth factor-beta (TGF-β)...
March 24, 2015: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/25887801/esculetin-attenuates-alterations-in-ang-ii-and-acetylcholine-mediated-vascular-reactivity-associated-with-hyperinsulinemia-and-hyperglycemia
#5
Almesh Kadakol, Vajir Malek, Santosh Kumar Goru, Anuradha Pandey, Shreyas Bagal, Anil Bhanudas Gaikwad
Esculetin (6, 7- dihydroxycoumarin) was found to be protective against hepatic and renal damage associated with Streptozotocin (STZ) induced type 1 diabetes, because of its radical scavenging property. However, there are no reports regarding its effect on vascular dysfunction under hyperinsulinemic and hyperglycemic conditions. Hence, the present study aimed to investigate the effect of esculetin on vascular dysfunction under these conditions. Non-genetic model of hyperinsulinemia and hyperglycemia were developed by high fat diet (HFD) feeding and HFD + Streptozotocin (STZ, 35 mg/kg, I...
May 29, 2015: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/25556973/angiotensin-receptor-i-stimulates-osteoprogenitor-proliferation-through-tgf%C3%AE-mediated-signaling
#6
Francesca Querques, Bruno Cantilena, Carmine Cozzolino, Maria Teresa Esposito, Fabiana Passaro, Silvia Parisi, Barbara Lombardo, Tommaso Russo, Lucio Pastore
Clinical studies of large human populations and pharmacological interventions in rodent models have recently suggested that anti-hypertensive drugs that target angiotensin II (Ang II) activity may also reduce loss of bone mineral density. Here, we identified in a genetic screening the Ang II type I receptor (AT1R) as a potential determinant of osteogenic differentiation and, implicitly, bone formation. Silencing of AT1R expression by RNA interference severely impaired the maturation of a multipotent mesenchymal cell line (W20-17) along the osteoblastic lineage...
July 2015: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/25523477/changes-in-urinary-angiotensinogen-posttreatment-in-pediatric-iga-nephropathy-patients
#7
Maki Urushihara, Takashi Nagai, Yukiko Kinoshita, Sato Nishiyama, Kenichi Suga, Natsuko Ozaki, Ariunbold Jamba, Shuji Kondo, Hiroyuki Kobori, Shoji Kagami
BACKGROUND: Recently, we demonstrated that urinary angiotensinogen (AGT) levels are increased and reflect intrarenal renin-angiotensin system (RAS) status in pediatric patients with chronic glomerulonephritis. Therefore, this study was performed to test the hypothesis that urinary AGT (UAGT) levels provide a specific index of intrarenal RAS status associated with RAS blockade treatment in pediatric IgA nephropathy (IgAN) patients. METHODS: We measured plasma and UAGT levels and urinary transforming growth factor beta (TGF-β) levels, after which we performed immunohistochemical analysis of AGT, angiotensin II (Ang II), and TGF-β in 24 pediatric IgAN patients treated with RAS blockades for 2 years...
June 2015: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/25485904/cardiac-steatosis-potentiates-angiotensin-ii-effects-in-the-heart
#8
Denis J Glenn, Michelle C Cardema, Wei Ni, Yan Zhang, Yerem Yeghiazarians, Dmitry Grapov, Oliver Fiehn, David G Gardner
Lipid accumulation in the heart is associated with obesity and diabetes and may play an important role in the pathogenesis of heart failure. The renin-angiotensin system is also thought to contribute to cardiovascular morbidity in obese and diabetic patients. We hypothesized that the presence of lipid within the myocyte might potentiate the cardiomyopathic effects of ANG II in the cardiac diacylglycerol acyl transferase 1 (DGAT1) transgenic mouse model of myocyte steatosis. Treatment with ANG II resulted in a similar increase in blood pressure in both nontransgenic and DGAT1 transgenic mice...
February 15, 2015: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/25359527/monocytes-with-angiogenic-potential-are-selectively-induced-by-liver-resection-and-accumulate-near-the-site-of-liver-regeneration
#9
Dominic Schauer, Patrick Starlinger, Philipp Zajc, Lejla Alidzanovic, Thomas Maier, Elisabeth Buchberger, Lorand Pop, Birgit Gruenberger, Thomas Gruenberger, Christine Brostjan
BACKGROUND: Monocytes reportedly contribute to liver regeneration. Three subsets have been identified to date: classical, intermediate, non-classical monocytes. The intermediate population and a subtype expressing TIE2 (TEMs) were suggested to promote angiogenesis. In a clinical setting, we investigated which monocyte subsets are regulated after liver resection and correlate with postoperative liver function. METHODS: In 38 patients monocyte subsets were evaluated in blood and subhepatic wound fluid by flow cytometry before and 1-3 days after resection of colorectal liver metastases...
2014: BMC Immunology
https://www.readbyqxmd.com/read/25275723/a-novel-ace2-activator-reduces-monocrotaline-induced-pulmonary-hypertension-by-suppressing-the-jak-stat-and-tgf-%C3%AE-cascades-with-restored-caveolin-1-expression
#10
Shiori Haga, Haruka Tsuchiya, Toshitake Hirai, Takaichi Hamano, Akio Mimori, Yukihito Ishizaka
INTRODUCTION: Pulmonary hypertension (PH) is characterized by increased pressure in the pulmonary artery and right ventricular hypertrophy (RVH). Recently, angiotensin-converting enzyme 2 (ACE2), which converts angiotensin (Ang) II into Ang-(1-7), was shown to inhibit experimental PH. Here we identified a novel ACE2 activator and investigated how the compound reduced monocrotaline (MCT)-induced PH. METHODS: To induce PH, Sprague-Dawley rats were injected subcutaneously with MCT, followed by the continuous administration of NCP-2454, an ACE2 activator, using osmotic pumps...
February 2015: Experimental Lung Research
https://www.readbyqxmd.com/read/25246357/angiotensin-1-7-abolishes-age-induced-cellular-hypertrophy-and-myofibroblast-transformation-via-inhibition-of-erk1-2
#11
Ebaa M Alzayadneh, Mark C Chappell
UNLABELLED: Angiotensin-(1-7) (Ang-(1-7))/AT7-Mas receptor axis is an alternative pathway within the renin-angiotensin system (RAS) that generally opposes the actions of Ang II/AT1 receptor pathway. Advanced glycated end product (AGEs) including glucose- and methylglyoxal-modified albumin (MGA) may contribute to the development and progression of diabetic nephropathy in part through activation of the Ang II/AT1 receptor system; however, the influence of AGE on the Ang-(1-7) arm of the RAS within the kidney is unclear...
December 2014: Cellular Signalling
https://www.readbyqxmd.com/read/25125004/androgen-attenuates-cardiac-fibroblasts-activations-through-modulations-of-transforming-growth-factor-%C3%AE-and-angiotensin-ii-signaling
#12
Cheng-Chih Chung, Rung-Chieh Hsu, Yu-Hsun Kao, Jing-Ping Liou, Yen-Yu Lu, Yi-Jen Chen
BACKGROUND: Androgen deficiency produces heart failure, which can be ameliorated by testosterone supplementation. Cardiac fibrosis plays a critical role in the pathophysiology of heart failure. This study aimed to evaluate whether testosterone can attenuate cardiac fibroblast activity through modulating transforming growth factor (TGF)-β and angiotensin (Ang) II signaling. METHODS: Migration, proliferation, myofibroblast differentiation, collagen production, and transcription signaling were evaluated in adult male rat (weighing 300-350 g) cardiac fibroblasts with and without incubation with testosterone (10nM) and co-administration of TGF-β1 (10 ng/ml) or Ang II (100 nM) by cell migration analysis, proliferation assay, soluble collagen measurement, zymographic analysis, immunofluorescence microscopy, real-time PCR and Western blot...
September 20, 2014: International Journal of Cardiology
https://www.readbyqxmd.com/read/25079175/angiotensin-1-7-prevents-angiotensin-ii-induced-fibrosis-in-cremaster-microvessels
#13
Kyle A Carver, Thomas L Smith, Patricia E Gallagher, E Ann Tallant
OBJECTIVE: The effect of the heptapeptide hormone Ang-(1-7) on microvascular fibrosis in rats with Ang II-induced hypertension was investigated, since vascular fibrosis/remodeling plays a prominent role in hypertension-induced end-organ damage and Ang-(1-7) inhibits vascular growth and fibrosis. METHODS: Fibrosis of cremaster microvessels was studied in male Lewis rats infused with Ang II and/or Ang-(1-7). RESULTS: Ang II elevated systolic blood pressure by approximately 40 mmHg, while blood pressure was not changed by Ang-(1-7)...
January 2015: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/24782646/tanshinone-iia-attenuates-bleomycin-induced-pulmonary-fibrosis-via-modulating-angiotensin-converting-enzyme-2-angiotensin-1-7-axis-in-rats
#14
Huajie Wu, Yan Li, Yanxia Wang, Dunquan Xu, Congcong Li, Manling Liu, Xin Sun, Zhichao Li
Pulmonary fibrosis (PF) is a common complication in those interstitial lung diseases patients, which will result in poor prognosis and short survival. Traditional therapeutic methods such as glucocorticoid and cytotoxic drugs are insufficient for treating PF and may cause severe side effects. Recent studies showed that traditional Chinese herbal abstraction such as Tanshinone IIA (TIIA) was displayed significant anti-PF effects in animal models. However, the exact mechanisms underlying the protective effects of TIIA were not fully understood...
2014: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/24067190/cardiac-protective-effects-of-irbesartan-via-the-ppar-gamma-signaling-pathway-in-angiotensin-converting-enzyme-2-deficient-mice
#15
Zhen-Zhou Zhang, Qian-Hui Shang, Hai-Yan Jin, Bei Song, Gavin Y Oudit, Lin Lu, Tong Zhou, Ying-Le Xu, Ping-Jin Gao, Ding-Liang Zhu, Josef M Penninger, Jiu-Chang Zhong
BACKGROUND: Angiotensin-converting enzyme 2 (ACE2), a monocarboxypeptidase which metabolizes angiotensin II (Ang II) to generate Ang-(1-7), has been shown to prevent cardiac hypertrophy and injury but the mechanism remains elusive. Irbesartan has the dual actions of angiotensin receptor blockade and peroxisome proliferator-activated receptor-γ (PPARγ) activation. We hypothesized that irbesartan would exert its protective effects on ACE2 deficiency-mediated myocardial fibrosis and cardiac injury via the PPARγ signaling...
September 25, 2013: Journal of Translational Medicine
https://www.readbyqxmd.com/read/24058553/h-2-s-inhibits-hyperglycemia-induced-intrarenal-renin-angiotensin-system-activation-via-attenuation-of-reactive-oxygen-species-generation
#16
Hong Xue, Ping Yuan, Jun Ni, Chen Li, Decui Shao, Jia Liu, Yang Shen, Zhen Wang, Li Zhou, Wei Zhang, Yu Huang, Chen Yu, Rui Wang, Limin Lu
Decrease in endogenous hydrogen sulfide (H2S) was reported to participate in the pathogenesis of diabetic nephropathy (DN). This study is aimed at exploring the relationship between the abnormalities in H2S metabolism, hyperglycemia-induced oxidative stress and the activation of intrarenal renin-angiotensin system (RAS). Cultured renal mesangial cells (MCs) and streptozotocin (STZ) induced diabetic rats were used for the studies. The expressions of angiotensinogen (AGT), angiotensin converting enzyme (ACE), angiotensin II (Ang II) type I receptor (AT1), transforming growth factor-β1 (TGF-β1) and collagen IV were measured by real time PCR and Western blot...
2013: PloS One
https://www.readbyqxmd.com/read/23896603/renin-angiotensin-system-blockade-ameliorates-lead-nephropathy
#17
Hwee-Yeong Ng, You-Lin Tain, Yueh-Ting Lee, Chung-Yao Hsu, Terry Ting-Yu Chiou, Pei-Chen Huang, Chien-Te Lee
Lead intoxication is usually insidious and may cause a variety of complications such as kidney damage and hypertension. The role of intrarenal renin-angiotensin system (RAS) in lead-induced nephropathy has not been investigated. Adult male Sprague-Dawley rats were fed with water containing 250ppm of lead acetate (lead group) and deionized water (control group) for 4weeks. Another two groups started to receive intraperitoneal captopril (50mg/kg/d) or losartan (10mg/kg/d) after 2weeks of lead feeding and continued for another 2weeks...
August 23, 2013: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/23835996/angiogenic-axis-angiopoietin-1-and-angiopoietin-2-tie-2-in-non-small-cell-lung-cancer-a-bronchoalveolar-lavage-and-serum-study
#18
W Naumnik, B Naumnik, K Niewiarowska, M Ossolinska, E Chyczewska
Angiopoietin-1 (Ang-1) and angiopoietin-2 (Ang-2), ligands for the Tie-2 receptor expressed on endothelial cells, play a critical role in angiogenesis, in concert with vascular endothelial growth factor (VEGF). Angiogenesis is important for tumor growth and development and also is implicated in the pathogenesis of interstitial lung diseases. The aim of this study was to evaluate the concentration of Ang-1, Ang-2, Tie-2, interleukin-18 (IL-18), transforming growth factor beta-1 (TGF β1), and VEGF domain in both serum and bronchoalveolar lavage fluid (BALF) of lung cancer patients before chemotherapy...
2013: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/23829789/telmisartan-an-at1-receptor-blocker-and-a-ppar-gamma-activator-alleviates-liver-fibrosis-induced-experimentally-by-schistosoma-mansoni-infection
#19
Yasmeen M Attia, Essam F Elalkamy, Olfat A Hammam, Soheir S Mahmoud, Aiman S El-Khatib
BACKGROUND: Hepatic schistosomiasis is considered to be one of the most prevalent forms of chronic liver disease in the world due to its complication of liver fibrosis. The demonstration of the pro-fibrogenic role of angiotensin (Ang) II in chronic liver disease brought up the idea that anti-Ang II agents may be effective in improving hepatic fibrosis by either blocking Ang II type 1 (AT1) receptors or inhibiting the angiotensin converting enzyme. Peroxisome proliferator-activated receptors gamma (PPARγ) activation has been also shown to inhibit hepatic stellate cell activation and progression of fibrosis...
2013: Parasites & Vectors
https://www.readbyqxmd.com/read/23684238/rough-titanium-alloys-regulate-osteoblast-production-of-angiogenic-factors
#20
Rene Olivares-Navarrete, Sharon L Hyzy, Rolando A Gittens, Jennifer M Schneider, David A Haithcock, Peter F Ullrich, Paul J Slosar, Zvi Schwartz, Barbara D Boyan
BACKGROUND CONTEXT: Polyether-ether-ketone (PEEK) and titanium-aluminum-vanadium (titanium alloy) are used frequently in lumbar spine interbody fusion. Osteoblasts cultured on microstructured titanium generate an environment characterized by increased angiogenic factors and factors that inhibit osteoclast activity mediated by integrin α2β1 signaling. It is not known if this is also true of osteoblasts on titanium alloy or PEEK. PURPOSE: The purpose of this study was to determine if osteoblasts generate an environment that supports angiogenesis and reduces osteoclastic activity when grown on smooth titanium alloy, rough titanium alloy, or PEEK...
November 2013: Spine Journal: Official Journal of the North American Spine Society
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