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Angiotensin AND RAS

Se Hee Min, Se Hong Kim, In Kyung Jeong, Ho Chan Cho, Jin Ok Jeong, Ju Hee Lee, Hyun Jae Kang, Hyo Soo Kim, Kyong Soo Park, Soo Lim
BACKGROUND AND OBJECTIVES: A relationship between renin-angiotensin system (RAS) components and metabolic syndrome (MetS) has been suggested, but not elucidated clearly. We examined the levels of RAS components in patients with and without MetS and their association with MetS in Korean population. METHODS: This study was approved by the review boards of the participating institutions and endorsed by the Korean Society of Lipid and Atherosclerosis. We screened 892 Koreans aged ≥20 years who underwent evaluation of hypertension, diabetes, or dyslipidemia at 6 tertiary hospitals in 2015-2016...
March 2018: Korean Circulation Journal
Ewa Szczepanska-Sadowska, Katarzyna Czarzasta, Agnieszka Cudnoch-Jedrzejewska
PURPOSE OF REVIEW: In many instances, the renin-angiotensin system (RAS) and the vasopressinergic system (VPS) are jointly activated by the same stimuli and engaged in the regulation of the same processes. RECENT FINDINGS: Angiotensin II (Ang II) and arginine vasopressin (AVP), which are the main active compounds of the RAS and the VPS, interact at several levels. Firstly, Ang II, acting on AT1 receptors (AT1R), plays a significant role in the release of AVP from vasopressinergic neurons and AVP, stimulating V1a receptors (V1aR), regulates the release of renin in the kidney...
March 19, 2018: Current Hypertension Reports
Tejas K Patel, Parvati B Patel
PURPOSE: The aim of this study was to estimate the prevalence of mortality among patients due to adverse drug reactions that lead to hospitalisation (fatal ADRAd ), to explore the heterogeneity in its estimation through subgroup analysis of study characteristics, and to identify system-organ classes involved and causative drugs for fatal ADRAd . METHODS: We identified prospective ADRAd -related studies via screening of the PubMed and Google Scholar databases with appropriate key terms...
March 19, 2018: European Journal of Clinical Pharmacology
Cassiano R A F Diniz, Plinio C Casarotto, Senem M Fred, Caroline Biojone, Eero Castrén, Sâmia R L Joca
The renin-angiotensin system (RAS) is associated with peripheral fluid homeostasis and cardiovascular function, but recent evidence also suggests a functional role in the brain. RAS regulates physiological and behavioral parameters related to the stress response, including depressive symptoms. Apparently, RAS can modulate levels of brain-derived neurotrophic factor (BDNF) and TRKB, which are important in the neurobiology of depression and antidepressant action. However, the interaction between the BDNF/TRKB system and RAS in depression has not been investigated before...
March 14, 2018: Neuropharmacology
Yanan Zhu, Na Zuo, Bin Li, Ying Xiong, Haiyun Chen, Hangyuan He, Zhaoxia Sun, Shuangshuang Hu, Hui Cheng, Ying Ao, Hui Wang
This study aimed to prove that prenatal ethanol exposure (PEE) can induce nephrotic syndrome in male rat offspring and to explore the underlying intrauterine programming mechanisms. Pregnant Wistar rats were intragastrically administered ethanol (4 g/kg d) from gestational day (GD) 9 to GD 20, and the male fetuses were delivered by cesarean section at GD20 and the male adult offspring were euthanized at postnatal week (PW) 24. In vitro, the primary metanephric mesenchyme cells were treated with ethanol at concentrations of 15-60 mM...
March 13, 2018: Toxicology
LaDonya Jackson, Wael Eldahshan, Susan C Fagan, Adviye Ergul
For many years, modulators of the renin angiotensin system (RAS) have been trusted by clinicians for the control of essential hypertension. It was recently demonstrated that these modulators have other pleiotropic properties independent of their hypotensive effects, such as enhancement of cognition. Within the brain, different components of the RAS have been extensively studied in the context of neuroprotection and cognition. Interestingly, a crosstalk between the RAS and other systems such as cholinergic, dopaminergic and adrenergic systems have been demonstrated...
March 15, 2018: International Journal of Molecular Sciences
Fernando Pedro de Souza-Neto, Melissa Carvalho Santuchi, Mario de Morais E Silva, Maria José Campagnole-Santos, Rafaela Fernandes da Silva
PURPOSE OF REVIEW: The purpose of this review was to summarize the current knowledge on the role of angiotensin-(1-7) [Ang-(1-7)] and alamandine in experimental hypertension and atherosclerosis. RECENT FINDINGS: The renin-angiotensin system (RAS) is a very complex system, composed of a cascade of enzymes, peptides, and receptors, known to be involved in the pathogenesis of hypertension and atherosclerosis. Ang-(1-7), identified and characterized in 1987, and alamandine, discovered 16 years after, are the newest two main effector molecules from the RAS, protecting the vascular system against hypertension and atherosclerosis...
March 14, 2018: Current Hypertension Reports
Pablo Garrido-Gil, Antonio Dominguez-Meijide, Rosario Moratalla, Maria J Guerra, Jose L Labandeira-Garcia
Gastrointestinal dysfunction is a common problem in the elderly. Aging-related changes in interactions between local dopaminergic and renin-angiotensin systems (RAS) have been observed in the brain, renal and vascular tissues. However, it is not known if these interactions also occur in the gut, and are dysregulated with aging. We showed a mutual regulation between the colonic dopaminergic system and RAS using young and aged mice deficient for major angiotensin and dopamine receptors. Aged rats showed a marked decrease in colonic dopamine D2 receptor expression, together with an increase in angiotensin type 1 (AT1) receptor expression, a decrease in angiotensin type 2 (AT2) receptor expression (i...
February 16, 2018: Oncotarget
Hong-Ren Yu, You-Lin Tain, Mao-Meng Tiao, Chih-Cheng Chen, Jiunn-Ming Sheen, I-Chun Lin, Shih-Wen Li, Ching-Chou Tsai, Yu-Ju Lin, Kai-Sheng Hsieh, Li-Tung Huang
BACKGROUND: Hypertension may result from high-fat (HF) diet induced-obesity and overexposure to glucocorticoids in utero. Recent studies demonstrated the potent contribution of adipose tissue's renin-angiotensin system (RAS) to systemic RAS, which plays a key role in regulating blood pressure (BP). In this study, we investigated the effects of prenatal dexamethasone (DEX) exposure and postnatal HF diet on RAS of adipose tissue. METHODS: RAS and BP of 6-month old rats exposed to prenatal DEX and/or postnatal HF diet were examined...
March 14, 2018: Lipids in Health and Disease
Shin Ishikane, Fumi Takahashi-Yanaga
Hypertension, which often exists as a comorbid condition in cancer patients, is considered as a factor affecting cancer progression. The renin-angiotensin system (RAS) plays an important role in theregulation of blood pressure, and angiotensin II (Ang II) is a well-known pressor peptide in RAS. There is also accumulated evidence indicating that Ang II plays a critical role in the metastasis of various cancers by modulating adhesion, migration invasion, proliferation, and angiogenesis. Consistent with this, large epidemiological studies have reported the potential beneficial effects of angiotensin-converting enzyme (ACE) inhibitors and Ang II type 1 receptor blockers (ARBs) against cancer metastasis; however, some of the results remain controversial...
March 10, 2018: Biochemical Pharmacology
Věra Čertíková Chábová, Petr Kujal, Petra Škaroupková, Zdeňka Varňourková, Šárka Vacková, Zuzana Husková, Soňa Kikerlová, Janusz Sadowski, Elzbieta Kompanowska-Jezierska, Iwona Baranowska, Sung Hee Hwang, Bruce D Hammock, John D Imig, Vladimír Tesař, Ludek Červenka
BACKGROUND/AIMS: We found recently that increasing renal epoxyeicosatrienoic acids (EETs) levels by blocking soluble epoxide hydrolase (sEH), an enzyme responsible for EETs degradation, shows renoprotective actions and retards the progression of chronic kidney disease (CKD) in Ren-2 transgenic hypertensive rats (TGR) after 5/6 renal ablation (5/6 NX). This prompted us to examine if additional protection is provided when sEH inhibitor is added to the standard renin-angiotensin system (RAS) blockade, specifically in rats with established CKD...
March 6, 2018: Kidney & Blood Pressure Research
P Kala, L Sedláková, P Škaroupková, L Kopkan, Z Vaňourková, M Táborský, A Nishiyama, S H Hwang, B D Hammock, J Sadowski, V Melenovský, J D Imig, L Červenka
We showed recently that increasing kidney epoxyeicosatrienoic acids (EETs) by blocking soluble epoxide hydrolase (sEH), an enzyme responsible for EETs degradation, retarded the development of renal dysfunction and progression of aorto-caval fistula(ACF)-induced congestive heart failure (CHF) in Ren-2 transgenic hypertensive rats (TGR). In that study the final survival rate of untreated ACF TGR was only 14 % but increased to 41 % after sEH blockade. Here we examined if sEH inhibition added to renin-angiotensin system (RAS) blockade would further enhance protection against ACF-induced CHF in TGR...
March 12, 2018: Physiological Research
Brenda de Oliveira da Silva, Luciane Carla Alberici, Letícia Ferreira Ramos, Caio Mateus Silva, Marina Bonfogo da Silveira, Carlos R P Dechant, Scott L Friedman, Kumiko Koibuchi Sakane, Letícia Rocha Gonçalves, Karen C M Moraes
The development of new therapeutic strategies to control or reverse hepatic fibrosis requires thorough knowledge about its molecular and cellular basis. It is known that the heptapeptide angiotensin-(1-7) [ang-(1-7)] can reduce hepatic fibrosis and steatosis in vivo; therefore, it is important to uncover the mechanisms regulating its activity and cellular model of investigation. Ang-(1-7) is a peptide of the renin-angiotensin system (RAS), and here we investigated its modulatory effect on the expression pattern of microRNAs (miRNAs) in hepatic stellate cells (HSCs) LX-2, which transdifferentiate into fibrogenic and proliferative cells...
March 7, 2018: International Journal of Biochemistry & Cell Biology
Masaki Mogi, Katsuhiko Kohara, Yasuharu Tabara, Kana Tsukuda, Michiya Igase, Masatsugu Horiuchi
Our previous report indicated that sarcopenia is associated with arterial stiffness and cardiovascular death. The renin-angiotensin system (RAS) plays an important role in cardiovascular disease and its activation may be correlated with sarcopenia according to basic research. However, few clinical studies have assessed the correlation between skeletal muscle loss and RAS component concentrations in healthy subjects. The purpose of this study was to investigate the relationships between the excretion of angiotensinogen (AGT) and aldosterone (Ald) in 24-h urine samples and clinical and sarcopenic indices...
March 9, 2018: Hypertension Research: Official Journal of the Japanese Society of Hypertension
Ioannis E Vasileiadis, Christos A Goudis, Pinelopi T Giannakopoulou, Tong Liu
Chronic obstructive pulmonary disease (COPD) is a complex disorder that primarily affects the lungs and is characterized not only by local pulmonary, but also by systemic inflammation which promotes the development of extrapulmonary and cardiovascular co-morbidities. Angiotensin converting enzyme (ACE) inhibitors and ARBs (angiotensin receptor blockers) are widely used drugs in the treatment of cardiovascular diseases, with growing evidence suggesting potential benefits in COPD patients. The purpose of this review is to describe the correlation of renin-angiotensin system (RAS) with COPD pathophysiology and to present the latest data regarding the potential role of RAS blockers in COPD...
March 9, 2018: COPD
Özcan Örsçelik, Buğra Özkan, Ayça Arslan, Emre Ertan Şahin, Ozan Sakarya, Orçun Ali Sürmeli, Şenay Balcı Fidancı, Ahmet Çelik, Burak Yavuz Çimen, İsmail Türkay Özcan
OBJECTIVE: Heart failure (HF) is a clinical syndrome resulting from structural or functional damages. Although clinical trials have shown that the plasma renin-angiotensin system (RAS) activation decreases HF functional status and increases hospitalization for HF patients, the effect of intrarenal RAS activity is still unknown. In this study, we investigated the relationship between the New York Heart Association (NYHA) class, duration, and number of hospitalizations in the previous year and urinary angiotensinogen (UAGT) in patients with HF with reduced ejection fraction (HFrEF)...
March 2018: Anatolian Journal of Cardiology
Minu R Pilvankar, Michele A Higgins, Ashlee N Ford Versypt
Diabetic kidney disease (DKD) is the primary cause of kidney failure. Diabetic hyperglycemia primarily damages podocyte cells. Podocytes express a local renin-angiotensin system (RAS) that produces angiotensin II (ANG II). ANG II levels are elevated by hyperglycemia, triggering podocyte injury. Quantitative descriptions of glucose dose dependency of ANG II are scarce in the literature. For better understanding of the mechanism of glycemic injury in DKD, a mathematical model is developed to describe the glucose-stimulated local RAS in podocytes...
March 8, 2018: Bulletin of Mathematical Biology
Nikolaos Fountoulakis, Giuseppe Maltese, Luigi Gnudi, Janaka Karalliedde
Context and Objective: Soluble Klotho (sKlotho) is a circulating hormone with cardiovascular-renal protective effects. Whether sKlotho predicts estimated glomerular filtration rate (eGFR) decline in type 2 diabetes mellitus (T2DM) patients with relatively preserved renal function is unknown. Design, setting, participants and measurements: Single-centre observational follow-up study of 101 patients with T2DM and eGFR >45 ml/min, [91% on renin angiotensin system (RAS) blockade] followed for a median (range) of 9 (2-13) years...
March 2, 2018: Journal of Clinical Endocrinology and Metabolism
Naro Ohashi, Shinsuke Isobe, Takashi Matsuyama, Sayaka Ishigaki, Naoko Tsuji, Tomoyuki Fujikura, Takayuki Tsuji, Akihiko Kato, Hideo Yasuda
Intrarenal renin-angiotensin system (RAS) activation plays an important role in the development of hypertension and renal damage. However, the association between daytime and night-time intrarenal RAS activation and renal structural damage in normotensive IgA nephropathy patients is unclear. We investigated the relationships between urinary angiotensinogen (U-AGT) excretion, which reflects intrarenal RAS activity, and renal structural damage (i.e., endocapillary and mesangial cell hypercellularity, arteriolar hyalinosis and arteriosclerosis levels, and global glomerulosclerosis and tubulointerstitial fibrosis percentages) in 27 normotensive IgA nephropathy patients (age 39...
March 5, 2018: Hypertension Research: Official Journal of the Japanese Society of Hypertension
Baoshan Liu, Rui Zhang, Shujian Wei, Qiuhuan Yuan, Mengyang Xue, Panpan Hao, Feng Xu, Jiali Wang, Yuguo Chen
BACKGROUND: Angiotensin II (Ang II) in the local cardiac renin-angiotensin system (RAS) is closely associated with alcoholic cardiomyopathy (ACM). Inhibition of local cardiac RAS has great significance in the treatment of ACM. Although aldehyde dehydrogenase 2 (ALDH2) has been demonstrated to protect against ACM through detoxification of aldehydes, the precise mechanisms are largely unknown. In the present study, we determined whether ALDH2 improved cardiac damage by inhibiting the local RAS in ACM and investigated the related regulatory mechanisms...
April 15, 2018: International Journal of Cardiology
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