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https://www.readbyqxmd.com/read/29679702/alamandine-attenuates-sepsis-associated-cardiac-dysfunction-via-inhibiting-mapks-signaling-pathways
#1
Peng Li, Xi-Ru Chen, Fei Xu, Chi Liu, Chang Li, Hui Liu, Hui Wang, Wei Sun, Yan-Hui Sheng, Xiang-Qing Kong
Sepsis-induced myocardial dysfunction represents a major cause of death in intensive care units. Alamandine is an important biologically active peptide in the renin-angiotensin system. The present study evaluated whether alamandine improves cardiac dysfunction, inflammation, and apoptosis, and affects the signaling pathways involved in these events. Experiments were carried out in mice treated with lipopolysaccharide (LPS) or alamandine, and in neonatal rat cardiomyocytes. Alamandine increased the ejection fraction and fractional shortening, both of which were decreased upon LPS infusion in mice...
April 18, 2018: Life Sciences
https://www.readbyqxmd.com/read/29679507/novel-inhibitors-of-the-cellular-ras-components-poricoic-acids-target-smad3-phosphorylation-and-wnt-%C3%AE-catenin-pathway-against-renal-fibrosis
#2
Ming Wang, Dan-Qian Chen, Lin Chen, Gang Cao, Hui Zhao, Dan Liu, Nosratola D Vaziri, Yan Guo, Ying-Yong Zhao
BACKGROUND AND PURPOSE: Tubulo-interstitial fibrosis is the final pathway of progression of CKD to ESRD. Renin-angiotensin system (RAS) plays a major role in CKD progression. Present study demonstrates efficacy of the novel RAS inhibitors isolated from Poria cocos against renal fibrosis. EXPERIMENTAL APPROACH: The effect of three novel tetracyclic triterpenoid compounds poricoic acid ZC (PZC), poricoic acid ZD (PZD) and poricoic acid ZE (PZE) was investigated on TGF-β1- and angiotensin II (AngII)-treated HK-2 cells and UUO mice...
April 21, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29679094/depletion-of-angiotensin-converting-enzyme-2-reduces-brain-serotonin-and-impairs-the-running-induced-neurogenic-response
#3
Friederike Klempin, Valentina Mosienko, Susann Matthes, Daniel C Villela, Mihail Todiras, Josef M Penninger, Michael Bader, Robson A S Santos, Natalia Alenina
Physical exercise induces cell proliferation in the adult hippocampus in rodents. Serotonin (5-HT) and angiotensin (Ang) II are important mediators of the pro-mitotic effect of physical activity. Here, we examine precursor cells in the adult brain of mice lacking angiotensin-converting enzyme (ACE) 2, and explore the effect of an acute running stimulus on neurogenesis. ACE2 metabolizes Ang II to Ang-(1-7) and is essential for the intestinal uptake of tryptophan (Trp), the 5-HT precursor. In ACE2-deficient mice, we observed a decrease in brain 5-HT levels and no increase in the number of BrdU-positive cells following exercise...
April 20, 2018: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29679000/valsartan-alleviates-insulin-resistance-in-skeletal-muscle-of-chronic-renal-failure-rats
#4
Yang Wang, Ri-Bao Wei, Yue Yang, Ting-Yu Su, Meng-Jie Huang, Ping Li, Xiang-Mei Chen
BACKGROUND Studies on insulin resistance (IR) in chronic kidney disease (CKD) patients are rare, and its exact mechanism remains unclear. In this study, we explored the molecular mechanism of IR with chronic renal failure (CRF) and interventions to alleviate IR in patients with CRF. MATERIAL AND METHODS In vivo and in vitro models of CRF were established by 5/6 nephrectomy and urea stimulation C2C12 cells, respectively. Based on the CRF model, angiotensin II (Ang II) and valsartan groups were established to observe the effect of drug intervention on IR...
April 21, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29678849/effects-of-adenovirus-mediated-vegf165-gene-therapy-on-myocardial-infarction
#5
Chao Wang, Boya Zhang, Yu Lin, Yang Dong
AIM: To evaluate the role of adenovirus-mediated transduction human VEGF isoform 165 via direct myocardial injection in rats with an occluded circumflex coronary artery, and the possible underlying mechanism. METHODS: Sprague-Dawley rats were induced myocardial infarction (MI) with ligation of the left coronary artery. Rats were randomly divided into 4 groups: 1) the sham group; 2) the MI group; 3) the NS (normal saline) group and 4) the VEGF group. Direct myocardial injection of 0...
March 2018: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/29678287/novel-mechanisms-of-g-protein-coupled-receptors-functions-at-1-angiotensin-receptor-acts-as-a-signaling-hub-and-focal-point-of-receptor-cross-talk
#6
REVIEW
András D Tóth, Gábor Turu, László Hunyady, András Balla
AT1 angiotensin receptor (AT1 R), a prototypical G protein-coupled receptor (GPCR), is the main receptor, which mediates the effects of the renin-angiotensin system (RAS). AT1 R plays a crucial role in the regulation of blood pressure and salt-water homeostasis, and in the development of pathological conditions, such as hypertension, heart failure, cardiovascular remodeling, renal fibrosis, inflammation, and metabolic disorders. Stimulation of AT1 R leads to pleiotropic signal transduction pathways generating arrays of complex cellular responses...
April 2018: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29678284/aberrant-g-protein-coupled-hormone-receptor-in-adrenal-diseases
#7
REVIEW
Matthieu St-Jean, Nada El Ghorayeb, Isabelle Bourdeau, André Lacroix
The regulation of cortisol or aldosterone production when ACTH of pituitary origin or the renin-angiotensin systems are suppressed in primary adrenal Cushing's syndrome or in primary aldosteronism is exerted by diverse genetic and molecular mechanisms. In addition to recently identified mutations in various genes implicated in the cyclic AMP or ion channel pathways, steroidogenesis is not really autonomous as it is frequently regulated by the aberrant adrenocortical expression of diverse hormone receptors, particularly G-protein coupled hormone receptors (GPCR) which can substitute for the normal function of ACTH or angiotensin-II...
April 2018: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29677050/changes-in-albuminuria-and-renal-outcome-in-patients-with-type-2-diabetes-and-hypertension-a-real-life-observational-study
#8
Francesca Viazzi, Antonio Ceriello, Paola Fioretto, Carlo Giorda, Pietro Guida, Giuseppina Russo, Eulalia Greco, Salvatore De Cosmo, Roberto Pontremoli
OBJECTIVES: To assess the predictive role of changes in albuminuria on the loss of renal function under antihypertensive treatment in patients with type 2 diabetes (T2D). METHODS: Clinical records from a total of 12 611 patients with hypertension and T2D, attending 100 antidiabetic centers in Italy, with normal estimated glomerular filtration rate (eGFR) at baseline and regular visits during a 4-year period were retrieved and analyzed. We assessed the association between changes in albuminuria status during a 1-year baseline period and time updated blood pressure (BP) and eGFR loss over the subsequent 4-year follow-up...
April 19, 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29676941/pk-pd-evaluation-of-fimasartan-for-the-treatment-of-hypertension-current-evidences-and-future-perspectives
#9
Fabio Angeli, Paolo Verdecchia, Monica Trapasso, Marina Pane, Sara Signorotti, Gianpaolo Reboldi
Fimasartan is the ninth and latest Angiotensin Receptor Blockers for the treatment of hypertension. Fimasartan is a derivative of losartan in which the imidazole ring has been replaced, a change that provided higher potency and longer duration than losartan. It provides a selective type 1 angiotensin II receptor antagonist effect with noncompetitive, insurmountable binding. Fimasartan is rapidly absorbed following oral administration with an oral bioavailability of 18.6 ± 7.2 %. Fimasartan is relatively stable in terms of metabolism and more than 90 % of circulating fimasartan moieties in the plasma are in the parent form; fecal elimination and biliary excretion are the predominant elimination pathways of fimasartan...
April 20, 2018: Expert Opinion on Drug Metabolism & Toxicology
https://www.readbyqxmd.com/read/29676873/-bradykinin-and-cardiovascular-protection-role-of-perindopril-an-inhibitor-of-angiotensin-conversion-enzyme
#10
P Lancellotti, A Ancion, V D'Orio, O Gach, P Maréchal, J M Krzesinski
The endothelium plays a vital role as part of the cardiovascular continuum. Risk factors such as hypertension and dyslipidemia unbalance angiotensin II - bradykinin homeostasis, leading to endothelial dysfunction and changes in vascular structure that promote atherosclerosis and thrombosis. When dealing with risk factors, treatment should focus on the prevention and restoration of endothelial function. Not all cardiovascular drugs are able to reverse vascular and structural endothelial dysfunction. Increasing levels of bradykinin is an effect of the use of angiotensin-converting enzyme inhibitors (ACE-Is), and also a fundamental part of their mode of action...
April 2018: Revue Médicale de Liège
https://www.readbyqxmd.com/read/29676870/-which-place-for-thiazide-and-thiazide-like-diuretics-in-patients-with-type-2-diabetes
#11
A J Scheen, J M Krzesinski
The use of thiazides as antihypertensive agents has been challenged because associated metabolic adverse events, including new-onset diabetes. However, these metabolic disturbances are less marked with low-dose of hydrochlorothiazide and with thiazide-like diuretics such as chlorthalidone and indapamide. In post hoc analyses of subgroups of patients with hypertension and type 2 diabetes, thiazide(-like) diuretics resulted in a significant reduction in cardiovascular events, all-cause mortality and hospitalization for heart failure compared to placebo...
April 2018: Revue Médicale de Liège
https://www.readbyqxmd.com/read/29676623/nicotine-downregulates-the-compensatory-angiotensin-converting-enzyme-2-angiotensin-type-2-receptor-of-the-renin-angiotensin-system
#12
Xinping Yue, Tyler M Basting, Thomas W Flanagan, Jiaxi Xu, Thomas D Lobell, Nicholas W Gilpin, Jason D Gardner, Eric Lazartigues
RATIONALE: Smoking is a major risk factor for the development of cardiovascular and pulmonary diseases. The importance of the renin-angiotensin system in the development of cardiovascular and pulmonary disease is well established. Angiotensin-II, by means of its type 1 receptor (angiotensin type 1 receptor, AT1 R), promotes increased sympathetic activity, salt and water reabsorption, vasoconstriction, inflammation, and aldosterone and vasopressin release, contributing to tissue fibrosis, endothelium dysfunction, and hypertension...
April 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29676239/transdermal-delivery-of-at1-receptor-antagonists-reduce-blood-pressure-and-reveals-a-vasodilatory-effect-in-kidney-blood-vessels
#13
Vasso Apostolopoulos, Michaila Michalatou, Maria-Eleni Androutsou, Markos Antonopoulos, George Agelis, Anthony Zulli, Tawar Qaradakhi, John Matsoukas
BACKGROUND: The Renin Angiotensin System (RAS) is pharmacologically targeted to reduce blood pressure, and patient compliance to oral medications is a clinical issue. The mechanisms of action of angiotensin receptor blockers (ARBs) in reducing blood pressure are not well understood, and is purported to be via a reduction of angiotensin II signaling. OBJECTIVE: We aimed to develop a transdermal delivery method for ARBs (losartan potassium and valsartan) and to determine if ARBs reveal a vasodilatory effect of the novel RAS peptide, alamandine...
April 19, 2018: Current Molecular Pharmacology
https://www.readbyqxmd.com/read/29676198/blockade-of-at1-type-receptors-for-angiotensin-ii-prevents-cardiac-microvascular-fibrosis-induced-by-chronic-stress-in-sprague-dawley-rats
#14
Lília Taddeo Firoozmand, Andrea Sanches, Nilsa Regina Damaceno-Rodrigues, Juliana Dinéia Perez, Danielle Sanches Aragão, Rodolfo Mattar Rosa, Fernanda Klein Marcondes, Dulce Elena Casarini, Elia Garcia Caldini, Tatiana Sousa Cunha
To test the effects of chronic-stress on the cardiovascular system, the model of chronic mild unpredictable stress (CMS) has been widely used. The CMS protocol consists of the random, intermittent, and unpredictable exposure of laboratory animals to a variety of stressors, during 3 consecutive weeks. In this study, we tested the hypothesis that exposure to the CMS protocol leads to left ventricle microcirculatory remodeling that can be attenuated by angiotensin II receptor blockade. Male Sprague-Dawley rats were randomly assigned into four groups: Control, Stress, Control + losartan, and Stress + losartan (N = 6, each group, losartan: 20 mg/kg/day)...
April 20, 2018: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/29675613/the-role-of-central-blood-pressure-monitoring-in-the-management-of-hypertension
#15
REVIEW
Adrian Ochoa, Gabriel Patarroyo-Aponte, Mahboob Rahman
PURPOSE OF REVIEW: Central blood pressure is a novel predictor of cardiovascular risk that can be measured in the clinical setting using currently available technology. This paper will review current available methods of central blood pressure monitoring as well as its impact in cardiac and renal disease. RECENT FINDINGS: Both aortic and carotid systolic blood pressure are independently associated with cardiovascular mortality and serious cardiac events. Furthermore, studies show that systolic aortic blood pressure has been shown to be superior predictor of cardiovascular as compared to brachial blood pressure...
April 19, 2018: Current Cardiology Reports
https://www.readbyqxmd.com/read/29674975/possible-role-of-nadph-oxidase-4-in-angiotensin-ii-induced-muscle-wasting-in-mice
#16
Tomoyasu Kadoguchi, Kazunori Shimada, Hiroshi Koide, Tetsuro Miyazaki, Tomoyuki Shiozawa, Shuhei Takahashi, Tatsuro Aikawa, Shohei Ouchi, Kenichi Kitamura, Yurina Sugita, Al Shahi Hamad, Mitsuhiro Kunimoto, Yayoi Sato-Okabayashi, Koji Akita, Kikuo Isoda, Hiroyuki Daida
Background: Muscle wasting is a debilitating phenotype associated with chronic heart failure (CHF). We have previously demonstrated that angiotensin II (AII) directly induces muscle wasting in mice through the activation of NADPH oxidase (Nox). In this study, we tested the hypothesis that deficiency of NADPH oxidase 4 (Nox4), a major source of oxidative stress, ameliorates AII-induced muscle wasting through the regulation of redox balance. Methods and Results: Nox4 knockout (KO) and wild-type (WT) mice were used...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29674718/tak-733-inhibits-inflammatory-neointimal-formation-by-suppressing-proliferation-migration-and-inflammation-in-vitro-and-in-vivo
#17
Jun-Hee Park, Sang Woo Kim, Min-Ji Cha, Nara Yoon, Chang Youn Lee, Jiyun Lee, Hyang-Hee Seo, Sunhye Shin, Jung-Won Choi, Seahyoung Lee, Soyeon Lim, Ki-Chul Hwang
As a potent and selective allosteric inhibitor of MEK, TAK-733 has been shown to exert anti-cancer effects for a wide range of cancers both in vitro and in vivo. However, its effects on inhibiting growth have never been investigated in the cardiovascular system, where regulation of abnormal vascular smooth muscle cell growth in neointimal hyperplasia is an important area of focus. Angiotensin II was used to mimic inflammatory neointimal hyperplasia in an in vitro environment, and balloon catheter-induced injury with an infusion of angiotensin II was used to generate an in vivo rat restenosis model under inflammatory conditions...
April 20, 2018: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/29674631/orally-active-species-independent-novel-a-3-adenosine-receptor-antagonist-protects-against-kidney-injury-in-db-db-mice
#18
Debra Dorotea, Ahreum Cho, Gayoung Lee, Guideock Kwon, Junghwa Lee, Pramod K Sahu, Lak Shin Jeong, Dae Ryong Cha, Hunjoo Ha
Diabetic kidney disease (DKD) is the leading cause of end-stage kidney disease, and the current pharmacological treatment for DKD is limited to renin-angiotensin system (RAS) inhibitors. Adenosine is detectable in the kidney and is significantly elevated in response to cellular damage. While all 4 known subtypes of adenosine receptors, namely, A1 AR, A2a AR, A2b AR, and A3 AR, are expressed in the kidney, our previous study has demonstrated that a novel, orally active, species-independent, and selective A3 AR antagonist, LJ-1888, ameliorates unilateral ureteral obstruction-induced tubulointerstitial fibrosis...
April 20, 2018: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/29674190/urinary-angiotensinogen-excretion-in-australian-indigenous-and-non-indigenous-pregnant-women
#19
Kirsty G Pringle, Celine Corbisier de Meaultsart, Shane D Sykes, Loretta J Weatherall, Lyniece Keogh, Don C Clausen, Gus A Dekker, Roger Smith, Claire T Roberts, Kym M Rae, Eugenie R Lumbers
The intrarenal renin-angiotensin system (iRAS) is implicated in the pathogenesis of hypertension, chronic kidney disease and diabetic nephropathy. Urinary angiotensinogen (uAGT) levels reflect the activity of the iRAS and are altered in women with preeclampsia. Since Indigenous Australians suffer high rates and early onset of renal disease, we hypothesised that Indigenous Australian pregnant women, like non-Indigenous women with pregnancy complications, would have altered uAGT levels. The excretion of RAS proteins was measured in non-Indigenous and Indigenous Australian women with uncomplicated or complicated pregnancies (preeclampsia, diabetes/gestational diabetes, proteinuria/albuminuria, hypertension, small/large for gestational age, preterm birth), and in non-pregnant non-Indigenous women...
April 11, 2018: Pregnancy Hypertension
https://www.readbyqxmd.com/read/29674000/angiotensin-ii-promotes-pulmonary-metastasis-of-melanoma-through-the-activation-of-adhesion-molecules-in-vascular-endothelial-cells
#20
Shin Ishikane, Hiroshi Hosoda, Takashi Nojiri, Takeshi Tokudome, Tetsuya Mizutani, Koichi Miura, Yoshiharu Akitake, Toru Kimura, Yoshitaka Imamichi, Shinya Kawabe, Yumiko Toyohira, Nobuyuki Yanagihara, Fumi Takahashi-Yanaga, Mikiya Miyazato, Kaoru Miyamoto, Kenji Kangawa
Hypertension is considered as one of the cancer progressive factors, and often found comorbidity in cancer patients. Renin-angiotensin system (RAS) plays an important role in the regulation of blood pressure, and angiotensin II (Ang II) is well known pressor peptide associated with RAS. Ang II has been reported to accelerate progression and metastasis of cancer cells. However, its precise mechanisms have not been fully understood. In this study, we sought to elucidate the mechanisms by which Ang II exacerbates hematogenous metastasis in mouse melanoma cells, focusing the adhesion pathway in vascular endothelial cells...
April 16, 2018: Biochemical Pharmacology
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