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Angiotensin AND RAS

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https://www.readbyqxmd.com/read/28641333/validation-of-brain-angiotensin-system-blockade-as-a-novel-drug-target-in-pharmacological-treatment-of-neuropsychiatric-disorders
#1
Dominik Wincewicz, Jan J Braszko
Retreat in psychiatric drug development results in innovative medication decline that might be at least partially overcome by adjunct therapy. New evidence from clinical studies has shown a possible role for brain Renin-Angiotensin System (RAS) in both affective and psychotic disorders. Simultaneously, rapidly accumulating data from basic studies indicate effectiveness of central RAS blockade in much broader range of neuropsychiatric disease. Recent findings implicate brain RAS, especially Angiotensin II (Ang II), in neural pathophysiology of mental disorders through neuroendocrine modulation and effects on neurotransmitter release, mostly noradrenaline, acetylcholine and dopamine...
June 22, 2017: Pharmacopsychiatry
https://www.readbyqxmd.com/read/28635327/within-visit-blood-pressure-variability-and-cardiovascular-risk-factors-in-hypertensive-patients-with-non-dialysis-chronic-kidney-disease
#2
Kengo Azushima, Hiromichi Wakui, Kazushi Uneda, Sona Haku, Ryu Kobayashi, Kohji Ohki, Sho Kinguchi, Kotaro Haruhara, Tetsuya Fujikawa, Yoshiyuki Toya, Satoshi Umemura, Kouichi Tamura
As there may be an association between within-visit blood pressure (BP) variability and cardiovascular disease (CVD), we investigated the clinical significance of this BP variability in non-dialysis chronic kidney disease (CKD) patients. MATERIALS AND METHODS: According to the median of coefficient of variation (CV) of three systolic BP (SBP) readings within a single visit, we divided hypertensive patients with stage G1-4 CKD already treated with antihypertensive therapy into the high SBP-CV group and the low SBP-CV group...
June 21, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28634582/cancer-stem-cells-in-moderately-differentiated-lip-squamous-cell-carcinoma-express-components-of-the-renin-angiotensin-system
#3
Rachna S Ram, Helen D Brasch, Jonathan C Dunne, Paul F Davis, Swee T Tan, Tinte Itinteang
AIM: We investigated the expression of the renin-angiotensin system (RAS) by cancer stem cell (CSC) subpopulations we have identified in moderately differentiated lip squamous cell carcinoma (MDLSCC). METHOD: Ten MDLSCC samples underwent 3,3-diaminobenzidine (DAB) and immunofluorescent immunohistochemical (IHC) staining for (pro)renin receptor (PRR), angiotensin-converting enzyme (ACE), angiotensin II receptor 1 (ATIIR1), and receptor 2 (ATIIR2). NanoString analysis and Western blotting (WB) were performed on six MDLSCC samples for gene and protein expression, respectively...
2017: Frontiers in Surgery
https://www.readbyqxmd.com/read/28632190/soluble-pro-renin-receptor-and-obstructive-sleep-apnea-syndrome-oxidative-stress-in-brain
#4
REVIEW
Kazuhiro Takahashi, Koji Ohba, Kazuki Tajima, Tsuguo Nishijima, Shigeru Sakurai
(Pro)renin receptor ((P)RR) is a multi-functional molecule that is related to both the renin-angiotensin system (RAS) and vacuolar H⁺-ATPase (v-ATPase), an ATP-dependent multi-subunit proton pump. Soluble (P)RR (s(P)RR), which consists of the extracellular domain of (P)RR, is present in blood and urine. Elevated plasma s(P)RR concentrations are reported in patients with chronic kidney disease and pregnant women with hypertension or diabetes mellitus. In addition, we have shown that plasma s(P)RR concentrations are elevated in patients with obstructive sleep apnea syndrome (OSAS)...
June 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28629525/erythropoietin-regulation-by-angiotensin-ii
#5
Yong-Chul Kim, Ognoon Mungunsukh, Regina M Day
The renin-angiotensin system (RAS) is a key regulator of blood pressure and blood volume homeostasis. The RAS is primarily comprised of the precursor protein angiotensinogen and the two proteases, renin and angiotensin-converting enzyme (ACE). Angiotensin I (Ang I) is derived from angiotensinogen by renin, but appears to have no biological activity. In contrast, angiotensin II (Ang II) that has a variety of biological functions in the cells is converted from Ang I through removal of two-C-terminal residues by ACE...
2017: Vitamins and Hormones
https://www.readbyqxmd.com/read/28626963/exercise-training-modulates-the-hepatic-renin-angiotensin-system-in-fructose-fed-rats
#6
Eliete Dalla Corte Frantz, Renata Frauches Medeiros, Isabele Gomes Giori, Juliana Bittencourt Silveira Lima, Thais Bento-Bernardes, Thaiane Gadioli Gaique, Caroline Fernandes-Santos, Tiago Fernandes, Edilamar Menezes Oliveira, Carla Paulo Vieira, Carlos Adam Conte-Junior, Karen Jesus Oliveira, Antonio Claudio Lucas da Nóbrega
The renin-angiotensin system (RAS) has been implicated in the development of metabolic syndrome. We investigated whether the hepatic RAS is modulated by exercise training and if this modulation improves the deleterious effects of fructose overload in rats. Male Wistar rats were divided into (n = 8 each) control (CT), exercise control (CT-Ex), high fructose (HFr) and exercise high fructose (HFr-Ex) groups. Fructose-drinking rats received D-fructose (100 g L(-1) ). After two weeks, CT-Ex and HFr-Ex rats were assigned to a treadmill training protocol at moderate-intensity for eight weeks (60 min day(-1) , four days/week)...
June 19, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28626916/unexpected-functions-of-angiotensin-converting-enzyme-beyond-its-enzymatic-activity
#7
REVIEW
Jean Martinez
Angiotensin converting enzyme (ACE) is a well-known enzyme, largely studied for its action on hypertension, as it produces angiotensin II from angiotensin I. This paper describes two original behaviours of ACE. We showed that ACE could hydrolyse gastrin, a neuropeptide from the gastrointestinal tract, releasing the C-terminal amidated dipeptide H-Asp-Phe-NH2 . This dipeptide is believed to be involved in the gastrin-induced acid secretion in the stomach. This hypothetic mechanism of action of gastrin resulted in a strategy to rationally design gastrin receptor antagonists...
June 19, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28626726/cancer-stem-cells-in-oral-cavity-squamous-cell-carcinoma-a-review
#8
REVIEW
Ranui Baillie, Swee T Tan, Tinte Itinteang
Cancer stem cells (CSCs) have been identified in oral cavity squamous cell carcinoma (OCSCC). CSCs possess the ability for perpetual self-renewal and proliferation, producing downstream progenitor cells and cancer cells that drive tumor growth. Studies of many cancer types including OCSCC have identified CSCs using specific markers, but it is still unclear as to where in the stem cell hierarchy these markers fall. This is compounded further by the presence of multiple CSC subtypes within OCSCC, making investigation reliant on the use of multiple markers...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28624188/a-novel-single-strand-rnai-therapeutic-agent-targeting-the-pro-renin-receptor-suppresses-ocular-inflammation
#9
Atsuhiro Kanda, Erdal Tan Ishizuka, Atsushi Shibata, Takahiro Matsumoto, Hidekazu Toyofuku, Kousuke Noda, Kenichi Namba, Susumu Ishida
The receptor-associated prorenin system (RAPS) refers to the pathogenic mechanism whereby prorenin binding to the (pro)renin receptor [(P)RR] dually activates the tissue renin-angiotensin system (RAS) and RAS-independent intracellular signaling. Here we revealed significant upregulation of prorenin and soluble (P)RR levels in the vitreous fluid of patients with uveitis compared to non-inflammatory controls, together with a positive correlation between these RAPS components and monocyte chemotactic protein-1 among several upregulated cytokines...
June 16, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28619367/the-vasoprotective-axes-of-the-renin-angiotensin-system-physiological-relevance-and-therapeutic-implications-in-cardiovascular-hypertensive-and-kidney-diseases
#10
REVIEW
Xiao C Li, Jianfeng Zhang, Jia L Zhuo
The renin-angiotensin system (RAS) is undisputedly one of the most prominent endocrine (tissue-to-tissue), paracrine (cell-to-cell) and intracrine (intracellular/nuclear) vasoactive systems in the physiological regulation of neural, cardiovascular, blood pressure, and kidney function. The importance of the RAS in the development and pathogenesis of cardiovascular, hypertensive and kidney diseases has now been firmly established in clinical trials and practice using renin inhibitors, angiotensin-converting enzyme (ACE) inhibitors, type 1 (AT1) angiotensin II (ANG II) receptor blockers (ARBs), or aldosterone receptor antagonists as major therapeutic drugs...
June 12, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28615146/novel-insights-into-acute-kidney-injury-chronic-kidney-disease-continuum-and-the-role-of-renin-angiotensin-system
#11
REVIEW
Yu-Hsiang Chou, Tao-Min Huang, Tzong-Shinn Chu
Acute kidney injury (AKI) is an independent risk factor for chronic kidney disease (CKD). If injury is mild, a repair process can be adaptive and lead to complete renal recovery. However, severe injury will be accompanied by a maladaptive repair which usually leads to nephron loss, fibrosis, vascular rarefaction, and chronic inflammation. Although various mechanisms underlying AKI-CKD transition have been explored, no intervention has been proved effective to block the transition until very recently. A lack of consensus for monitoring renal function and defining renal recovery after AKI should be the reasons for the slow advance in the discovery of a timely pharmacologic treatment to block AKI-CKD transition...
June 11, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28614412/differential-effects-of-losartan-and-atorvastatin-in-partial-and-full-thickness-burn-wounds
#12
Johanneke J Akershoek, Katrien M Brouwer, Marcel Vlig, Bouke K H L Boekema, Rob H J Beelen, Esther Middelkoop, Magda M W Ulrich
Healing of burn wounds is often associated with scar formation due to excessive inflammation and delayed wound closure. To date, no effective treatment is available to prevent the fibrotic process. The Renin Angiotensin System (RAS) was shown to be involved in fibrosis in various organs. Statins (e.g. Atorvastatin), Angiotensin receptor antagonists (e.g. Losartan) and the combination of these drugs are able to reduce the local RAS activation, and reduced fibrosis in other organs. We investigated whether inhibition of the RAS could improve healing of burn wounds by treatment with Atorvastatin, Losartan or the combination of both drugs...
2017: PloS One
https://www.readbyqxmd.com/read/28607392/chronic-vitamin-d-deficiency-induces-lung-fibrosis-through-activation-of-the-renin-angiotensin-system
#13
Yongyan Shi, Tianjing Liu, Li Yao, Yujiao Xing, Xinyi Zhao, Jianhua Fu, Xindong Xue
Pulmonary fibrosis, which influences lung function and exacerbates a patient's condition, is the ultimate stage of many lung diseases. Vitamin D deficiency is associated with pulmonary fibrosis and impaired lung function, but the underlying mechanism has not yet been fully elucidated. Moreover, vitamin D deficiency may cause over-activation of the renin-angiotensin system (RAS), which aggravates extracellular matrix (ECM) deposition and lung fibrosis. This study aims to investigate the effect of chronic vitamin D deficiency on lung fibrosis in otherwise healthy mice and to explore the role of RAS in this process...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28605813/overexpression-of-angiotensin-converting-enzyme-2-ameliorates-amyloid-%C3%AE-induced-inflammatory-response-in-human-primary-retinal-pigment-epithelium
#14
Xinyu Fu, Ru Lin, Yiguo Qiu, Peng Yu, Bo Lei
Purpose: Amyloid-β (Aβ) is a major constituent of drusen, which is a hallmark of early AMD. The purpose of this study was to investigate whether enhancement of ACE2, an important component of the protective angiotensin-converting enzyme 2 (ACE2)/Ang-(1-7)/Mas axis of the renin angiotensin system (RAS), ameliorates Aβ-induced inflammatory response in human RPE cells. Methods: Annexin-V FITC/propidium iodide assay for detecting apoptosis rate was used to determine the optimum concentration and incubation time of Aβ1-42...
June 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28599664/angiotensin-ii-type-2-receptor-promotes-apoptosis-and-inhibits-angiogenesis-in-bladder-cancer
#15
Nana Pei, Yingying Mao, Pengfei Wan, Xinglu Chen, Andrew Li, Huiying Chen, Jinlong Li, Renqiang Wan, Yanling Zhang, Hongyan Du, Baihong Chen, Guangyu Jiang, Minghan Xia, Colin Sumners, Guixue Hu, Dongsheng Gu, Hongwei Li
BACKGROUND: Bladder cancer (BCa) is the ninth most common form of cancer in the world. There is a continuing need not only for improving the accuracy of diagnostic markers but also for the development of new treatment strategies. Recent studies have shown that the renin-angiotensin system (RAS), which include the angiotensin type 1 (AT1R), type 2(AT2R), and Mas receptors, play an important role in tumorigenesis and may guide us in meeting those needs. RESULTS: In this study, we first observed that AT1R and Mas expression levels were significantly upregulated in BCa specimens while AT2R was significantly downregulated...
June 9, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/28596754/angiotensins-and-huntington-s-disease-a-study-on-immortalized-progenitor-striatal-cell-lines
#16
Walmor C De Mello, Yamil Gerena, Sylvette Ayala-Peña
Neurons from mouse models of Huntington's disease (HD) exhibit altered electrophysiological properties, potentially contributing to neuronal dysfunction and neurodegeneration. The renin-angiotensin system (RAS) is a potential contributor to the pathophysiology of neurodegenerative diseases. However, the role of angiotensin II (Ang II) and angiotensin (1-7) has not been characterized in HD. We investigated the influence of Ang II and angiotensin (1-7) on total potassium current using immortalized progenitor mutant huntingtin-expressing (Q111) and wild-type (Q7) cell lines...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28596676/renin-angiotensin-system-in-liver-diseases-friend-or-foe
#17
REVIEW
Ana Cristina Simões E Silva, Aline S Miranda, Natália P Rocha, Antônio L Teixeira
In the last three decades, the understanding of the renin angiotensin system (RAS) has been changed by the discoveries of functional local systems, novel biologically active peptides, additional specific receptors, alternative pathways of angiotensin (Ang) II generation, and new roles for enzymes and precursor components other than those in Ang II synthesis. In this regard, the discovery that Ang-(1-7) opposes the pressor, proliferative, pro-fibrotic, and pro-inflammatory effects mediated by Ang II has contributed to the realization that the RAS is composed of two axes...
May 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28595131/a-precision-guided-mwnt-mediated-reawakening-the-sunk-synergy-in-ras-for-anti-angiogenesis-lung-cancer-therapy
#18
Yujie Su, Yahui Hu, Yu Wang, Xiangting Xu, Yang Yuan, Yunman Li, Zeyuan Wang, Kerong Chen, Fangrong Zhang, Xuefang Ding, Min Li, Jianping Zhou, Yuan Liu, Wei Wang
Multi-walled carbon nanotube (MWNT) with its versatility has exhibited tremendous superiority in drug delivery. Despite plenty of researches on MWNT based delivery systems, precision-guided assistances to maximize their profitable properties are still lacking in substantive progress. We developed here a dual-targeting and co-delivery system based on MWNT for antiangiogenesis therapy in lung cancer which aimed at renin-angiotensin system (RAS) dysregulation by synergistically conducting angiotensin II type 1 receptor (AT1R) and type 2 receptor (AT2R) pathway...
September 2017: Biomaterials
https://www.readbyqxmd.com/read/28589995/trans-polydatin-protects-the-mouse-heart-against-ischemia-reperfusion-injury-via-inhibition-of-the-renin-angiotensin-system-ras-and-rho-kinase-rock-activity
#19
Dong Ming, Liao Songyan, Chen Yawen, Zheng Na, Ma Jing, Xiao Zhaowen, Liu Ye, Ding Wa, Liu Jie
BACKGROUND: Recent studies highlighted the protective benefits of a Chinese herb extract from polygonum cuspidatum, trans-polydatin, on cardiac disease. We investigated the therapeutic effect of trans-polydatin on myocardial ischemia/reperfusion (IR) injury and the underlying mechanisms related to the renin-angiotensin system (RAS) and RhoA kinase (ROCK) pathway. METHODS AND RESULTS: Experiments were performed on neonatal rats' ventricular myocytes that were subjected to hypoxia-reoxygenation (simulated IR, SIR) and on adult mice which were subjected to left anterior descending coronary artery occlusion for 45 min followed by a one-week reperfusion...
June 7, 2017: Food & Function
https://www.readbyqxmd.com/read/28587403/effects-of-1-25-dihydroxyvitamin-d3-on-the-local-bone-renin-angiotensin-system-in-a-murine-model-of-glucocorticoid-induced-osteoporosis
#20
Lin Shen, Chen Ma, Bo Shuai, Yanping Yang
Active vitamin D is closely related to the circulating renin-angiotensin system (RAS) in experimental animal models and humans; however, corresponding local bone data remain limited. The present study examined whether 1,25-dihydroxyvitamin D3 supplementation altered local bone RAS elements in a murine model of glucocorticoid-induced osteoporosis (GIOP). A total of 36 8-week-old mice were randomized into three equal-sized groups: The sham, GIOP and 1,25-dihydroxyvitamin D3 treatment groups. After 12 weeks, the cancellous bone microstructure of the third lumbar vertebra and left femur from the mice from each group were examined using micro-computed tomography...
June 2017: Experimental and Therapeutic Medicine
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