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https://www.readbyqxmd.com/read/29438223/knockdown-of-tfpi-anchored-endothelial-cells-exacerbates-lipopolysaccharide-induced-acute-lung-injury-via-nf-%C3%AE%C2%BAb-signaling-pathway
#1
Bao Q Wang, Meng Shi, Jian P Zhang, Xie Wu, Mei J Chang, Zhi H Chen, Hua H Shen, Yuan L Song, Jian Zhou, Chun X Bai
BACKGROUND: As activation of the coagulation system is both a consequence and contributor to acute lung injury (ALI), pulmonary coagulopathy has become a potential target for therapeutic intervention in ALI patients. We investigated the effects and possible mechanisms of endothelial cell (EC)-anchored tissue factor pathway inhibitor (TFPI) on lipopolysaccharide (LPS)-induced ALI in mice. METHODS: To assess the effect of endothelial cell-anchored TFPI deletion on ALI indices, TFPI knockout (cKO) mice were generated...
February 12, 2018: Shock
https://www.readbyqxmd.com/read/29430615/development-of-obesity-can-be-prevented-in-rats-by-chronic-icv-infusions-of-angii-but-less-by-ang-1-7
#2
Martina Winkler, Michael Bader, Franziska Schuster, Ines Stölting, Sonja Binder, Walter Raasch
Considering that obesity is one of the leading risks for death worldwide, it should be noted that a brain-related mechanism is involved in AngII-induced and AT1-receptor-dependent weight loss. It is moreover established that activation of the Ang(1-7)/ACE2/Mas axis reduces weight, but it remains unclear whether this Ang(1-7) effect is also mediated via a brain-related mechanism. Additionally to Sprague Dawley (SD) rats, we used TGR(ASrAOGEN) selectively lacking brain angiotensinogen, the precursor to AngII, as we speculated that effects are more pronounced in a model with low brain RAS activity...
February 11, 2018: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/29407880/the-protective-effect-of-resveratrol-on-vascular-aging-by-modulation-of-the-renin-angiotensin-system
#3
Eun Nim Kim, Min Young Kim, Ji Hee Lim, Yaeni Kim, Seok Joon Shin, Cheol Whee Park, Yong-Soo Kim, Yoon Sik Chang, Hye Eun Yoon, Bum Soon Choi
BACKGROUND AND AIMS: This study evaluated the effects of resveratrol on arterial aging and the renin-angiotensin system (RAS) in mice and vascular smooth muscle cells (VSMCs). METHODS: Aging mice were divided into control and resveratrol groups. Histological changes, inflammation, oxidative stress, RAS components, and the expression of AMP-activated protein kinase (AMPK), silent information regulator T1 (SIRT1), peroxisome proliferator-activated receptor-γ co-activator 1α (PGC-1α), and anti-oxidative enzymes was measured in thoracic aortas of 24-month-old mice...
February 2, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29363860/ace2-epc-exs-protect-ageing-ecs-against-hypoxia-reoxygenation-induced-injury-through-the-mir-18a-nox2-ros-pathway
#4
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...
January 24, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29360543/coupling-corticotropin-releasing-hormone-and-angiotensin-converting-enzyme-2-dampens-stress-responsiveness-in-male-mice
#5
Lei A Wang, Annette D de Kloet, Michael D Smeltzer, Karlena M Cahill, Helmut Hiller, Erin B Bruce, David J Pioquinto, Jacob A Ludin, Michael J Katovich, Mohan K Raizada, Eric G Krause
This study used mice to evaluate whether coupling expression of corticotropin-releasing hormone (CRH) and angiotensin converting enzyme 2 (ACE2) creates central interactions that blunt endocrine and behavioral responses to psychogenic stress. Central administration of diminazene aceturate, an ACE2 activator, had no effect on restraint-induced activation of the hypothalamic-pituitary-adrenal (HPA) axis; however, mice that ubiquitously overexpress ACE2 had reduced plasma corticosterone (CORT) and pituitary expression of POMC mRNA...
January 19, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29358853/serum-levels-of-angiotensin-converting-enzyme-as-a-biomarker-of-liver-fibrosis
#6
EDITORIAL
Aline Silva Miranda, Ana Cristina Simões E Silva
The renin angiotensin system (RAS) is classically conceived as a circulating hormonal system involved in blood pressure control and hydroelectrolyte balance. The discovery that RAS components are locally expressed in a wide range of organs and tissues, including the liver, pointed to a role for this system in the pathogenesis of several conditions including hepatic fibrosis and cirrhosis. It has been widely reported that the classical RAS axis composed by the angiotensin converting enzyme (ACE)-angiotensin (Ang) II-Ang type 1 (AT1) receptor mediates pro-inflammatory, pro-thrombotic, and pro-fibrotic processes...
December 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29351514/the-ace2-angiotensin-1-7-mas-axis-of-the-renin-angiotensin-system-focus-on-angiotensin-1-7
#7
Robson Augusto Souza Santos, Walkyria Oliveira Sampaio, Andreia C Alzamora, Daisy Motta-Santos, Natalia Alenina, Michael Bader, Maria Jose Campagnole-Santos
The renin-angiotensin system (RAS) is a key player in the control of the cardiovascular system and hydroelectrolyte balance, with an influence on organs and functions throughout the body. The classical view of this system saw it as a sequence of many enzymatic steps that culminate in the production of a single biologically active metabolite, the octapeptide angiotensin (ANG) II, by the angiotensin converting enzyme (ACE). The past two decades have revealed new functions for some of the intermediate products, beyond their roles as substrates along the classical route...
January 1, 2018: Physiological Reviews
https://www.readbyqxmd.com/read/29335866/balancing-effect-of-biejiajian-oral-liquid-on-ace-ang-ii-at1r-axis-and-ace2-ang-1-7-mas-axis-in-rats-with-ccl4-induced-hepatic-fibrosis
#8
Xiao-Ya Li, Yan Peng, Xia-Wei Bu, Jia Yao, Li Yao
OBJECTIVE: To explore the effect of Biejiajian Oral Liquid (, BOL) on CCl4-induced hepatic fibrosis in rats by detecting the changes in the levels of angiotensin II (Ang II), angiotensin-(1-7) [Ang-(1-7)], angiotensin-converting enzyme (ACE), ACE2, angiotensin II type 1 receptor (AT1R), Mas, etc. METHODS: A total of 180 Wistar rats were randomly divided into two groups by random digital table method: prevention experiment and treatment experiment. Each group was further subdivided into the following 6 subgroups: normal control group, model group, vitamin E [100 mg/(kg•d), VE] group, enalapril [10 mg/(kg•g), Ena] group, high-dosage [20 g/(kg•d)] BOL group, and low-dosage [10 g/(kg•d)] BOL group...
January 15, 2018: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/29328448/association-between-ace2-ace-balance-and-pneumocyte-apoptosis-in-a-porcine-model-of-acute-pulmonary-thromboembolism-with-cardiac-arrest
#9
Hong-Li Xiao, Lian-Xing Zhao, Jun Yang, Nan Tong, Le An, Qi-Tong Liu, Miao-Rong Xie, Chun-Sheng Li
Acute pulmonary embolism (APE) is frequently reported in patients with cardiac arrest (CA) in emergency care. Pneumocyte apoptosis is commonly observed in the lungs following an APE. An important pathological mechanism evoking apoptosis during a lipopolysaccharide‑induced acute lung injury is the angiotensin‑converting enzyme 2 (ACE2)/ACE imbalance. The present study uses a porcine model to examine the anti‑apoptotic effects of captopril on APE‑CA and the return of spontaneous circulation (ROSC). Pigs were randomly assigned into four groups: Control, APE‑CA, ROSC‑saline, and ROSC‑captopril...
January 12, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29321064/the-role-of-ace2-angiotensin-1-7-and-mas1-receptor-axis-in-glucocorticoid-induced-intrauterine-growth-restriction
#10
Elham Ghadhanfar, Aseel Alsalem, Shaimaa Al-Kandari, Jumana Naser, Fawzi Babiker, Maie Al-Bader
BACKGROUND: Plasma and urine levels of the potent vasodilator Ang-(1-7) are elevated in mid and late pregnancy and are correlated with elevated placental angiogenesis, fetal blood flow, and rapid fetal growth. We hypothesized that Ang-(1-7), its receptor (Mas1) and the enzymes involved in Ang-(1-7) production (ACE2 and Membrane metallo-endopeptidase; MME) are down regulated in response to glucocorticoid administration contributing to IUGR. METHODS: Pregnant female Sprague-Dawley rats were injected with dexamethasone (DEX; 0...
December 29, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/29288933/targeting-the-renin-angiotensin-system-as-novel-therapeutic-strategy-for-pulmonary-diseases
#11
REVIEW
Wan Shun Daniel Tan, Wupeng Liao, Shuo Zhou, Dan Mei, Wai-Shiu Fred Wong
The renin-angiotensin system (RAS) plays a major role in regulating electrolyte balance and blood pressure. RAS has also been implicated in the regulation of inflammation, proliferation and fibrosis in pulmonary diseases such as asthma, acute lung injury (ALI), chronic obstructive pulmonary disease (COPD), idiopathic pulmonary fibrosis (IPF) and pulmonary arterial hypertension (PAH). Current therapeutics suffer from some drawbacks like steroid resistance, limited efficacies and side effects. Novel intervention is definitely needed to offer optimal therapeutic strategy and clinical outcome...
December 27, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/29237475/recombinant-human-ace2-acing-out-angiotensin-ii-in-ards-therapy
#12
EDITORIAL
Haibo Zhang, Andrew Baker
No abstract text is available yet for this article.
December 13, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29225087/activation-of-ace2-angiotensin-1-7-attenuates-pancreatic-%C3%AE-cell-dedifferentiation-in-a-high-fat-diet-mouse-model
#13
Xiuping Xuan, Fei Gao, Xiaoyi Ma, Chenghu Huang, Hongjun Deng, Shiqi Wang, Wencun Li, Li Yuan
OBJECTIVE: Angiotensin-converting enzyme 2 (ACE2) has been identified in pancreatic islets and can preserve β cells. In this study, we aimed to examine the possible role of ACE2 and its end product, angiotensin 1-7 (A1-7), in reducing β cell dedifferentiation during metabolic stress. METHODS: First, a lineage-tracing experiment was performed to track β cells in mice fed a high-fat diet (HFD). Second, the ACE2/A1-7 axis was evaluated in the HFD mouse model. Intraperitoneal glucose tolerance tests (IPGTTs) and intraperitoneal insulin tolerance tests (IPITTs) were conducted...
December 7, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29211853/nrf2-deficiency-upregulates-intrarenal-angiotensin-converting-enzyme-2-and-angiotensin-1-7-receptor-expression-and-attenuates-hypertension-and-nephropathy-in-diabetic-mice
#14
Shuiling Zhao, Anindya Ghosh, Chao-Sheng Lo, Isabelle Chenier, James W Scholey, Janos G Filep, Julie R Ingelfinger, Shao-Ling Zhang, John S D Chan
We investigated the role of nuclear factor erythroid 2-related factor 2 (Nrf2) in renin-angiotensin system (RAS) gene expression in renal proximal tubule cells (RPTCs) and in the development of systemic hypertension and kidney injury in diabetic Akita mice. We used adult male Akita Nrf2 knockout mice and Akita mice treated with trigonelline (an Nrf2 inhibitor) or oltipraz (an Nrf2 activator). We also examined rat immortalized RPTCs (IRPTCs) stably transfected with control plasmids or plasmids containing rat angiotensinogen (Agt), angiotensin-converting enzyme (ACE), angiotensin-converting enzyme-2 (Ace2), or angiotensin 1-7 (Ang 1-7) receptor (MasR) gene promoters...
February 1, 2018: Endocrinology
https://www.readbyqxmd.com/read/29196099/dkk3-overexpression-attenuates-cardiac-hypertrophy-and-fibrosis-in-an-angiotensin-perfused-animal-model-by-regulating-the-adam17-ace2-and-gsk-3%C3%AE-%C3%AE-catenin-pathways
#15
Chun-Gang Zhai, Ye-Yang Xu, Yuan-Yuan Tie, Ya Zhang, Wen-Qiang Chen, Xiao-Ping Ji, Yang Mao, Lei Qiao, Jing Cheng, Qing-Bo Xu, Cheng Zhang
AIMS: Cardiac pressure and humoral factors induce cardiac hypertrophy and fibrosis, which are characterized by increased stiffness, reduced contractility and altered perfusion. Angiotensin II (AngII) is well known to promote this pathology. Angiotensin-converting enzyme (ACE) 2, which cleaves AngII and forms Ang-(1-7), exerts protective anti-hypertrophy and anti-fibrosis effects. A disintegrin and metalloproteinase 17 (ADAM17), a membrane-bound enzyme reported to cleave ACE2, may participate in the pathological process of AngII perfusion-induced heart damage...
December 4, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29190287/discovery-of-a-rich-gene-pool-of-bat-sars-related-coronaviruses-provides-new-insights-into-the-origin-of-sars-coronavirus
#16
Ben Hu, Lei-Ping Zeng, Xing-Lou Yang, Xing-Yi Ge, Wei Zhang, Bei Li, Jia-Zheng Xie, Xu-Rui Shen, Yun-Zhi Zhang, Ning Wang, Dong-Sheng Luo, Xiao-Shuang Zheng, Mei-Niang Wang, Peter Daszak, Lin-Fa Wang, Jie Cui, Zheng-Li Shi
A large number of SARS-related coronaviruses (SARSr-CoV) have been detected in horseshoe bats since 2005 in different areas of China. However, these bat SARSr-CoVs show sequence differences from SARS coronavirus (SARS-CoV) in different genes (S, ORF8, ORF3, etc) and are considered unlikely to represent the direct progenitor of SARS-CoV. Herein, we report the findings of our 5-year surveillance of SARSr-CoVs in a cave inhabited by multiple species of horseshoe bats in Yunnan Province, China. The full-length genomes of 11 newly discovered SARSr-CoV strains, together with our previous findings, reveals that the SARSr-CoVs circulating in this single location are highly diverse in the S gene, ORF3 and ORF8...
November 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29157100/imbalanced-plasma-ace-and-ace2-level-in-the-uremic-patients-with-cardiovascular-diseases-and-its-change-during-a-single-hemodialysis-session
#17
Chung-Wei Yang, Li-Che Lu, Chia-Chu Chang, Ching-Chang Cho, Wen-Yeh Hsieh, Chin-Hung Tsai, Yi-Chang Lin, Chih-Sheng Lin
BACKGROUND: The renin-angiotensin system (RAS) has significant influences on heart and renal disease progression. Angiotensin converting enzyme (ACE) and angiotensin converting enzyme II (ACE2) are major peptidases of RAS components and play counteracting functions through angiotensin II (Ang II)/ATIR and angiotensin-(1-7) (Ang-(1-7))/Mas axis, respectively. METHODS: There were 360 uremic patients on regular hemodialysis (HD) treatment (inclusive of 119 HD patients with cardiovascular diseases (CVD) and 241 HD patients without CVD and 50 healthy subjects were enrolled in this study...
November 2017: Renal Failure
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, B0AT-1, to absorb tryptophan for regulation of microbiota-gut-brain axis...
November 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29146157/angiotensin-converting-enzyme-2-activation-ameliorates-pulmonary-endothelial-dysfunction-in-rats-with-pulmonary-arterial-hypertension-through-mediating-phosphorylation-of-endothelial-nitric-oxide-synthase
#19
Gang Li, Han Zhang, Lei Zhao, Yaozhong Zhang, Daole Yan, Yinglong Liu
This study aims to investigate the effect of angiotensin-converting enzyme 2 (ACE2) activation on pulmonary endothelial function in the process of preventing pulmonary arterial hypertension (PAH) in rat models and to explore the underlying mechanisms. Specific pathogen free rats were randomly divided into five groups including control group, PAH group, PAH + Resorcinolnaphthalein (Res) group (ACE2 activation), PAH + Res + MLN4760 group (ACE2 inhibition), and PAH + Res + L-NAME group (endothelial nitric oxide synthase [eNOS] inhibition)...
October 28, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/29142129/entry-of-human-coronavirus-nl63-to-the-cell
#20
Aleksandra Milewska, Paulina Nowak, Katarzyna Owczarek, Artur Szczepanski, Miroslaw Zarebski, Agnieszka Hoang-Bujnowicz, Krzysztof Berniak, Jacek Wojarski, Slawomir Zeglen, Zbigniew Baster, Zenon Rajfur, Krzysztof Pyrc
First steps of human coronavirus NL63 (HCoV-NL63) infection were previously described. The virus binds to target cells by heparan sulfate proteoglycans, and interacts with the ACE2 protein. Subsequent events, including virus internalization and trafficking, remain to be elucidated. In this study, we mapped the process of HCoV-NL63 entry into LLC-Mk2 cell line and ex vivo 3D tracheobronchial tissue.Using a variety of techniques we have shown that HCoV-NL63 virions require endocytosis for successful entry to the LLC-MK2 cells, and interaction between the virus and the ACE2 molecule triggers recruitment of clathrin...
November 15, 2017: Journal of Virology
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