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Renin angiotensin aldosterone

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https://www.readbyqxmd.com/read/28650605/angiotensin-ii-enhancement-during-pregnancy-influences-the-emotionality-of-rat-offspring-rattus-norvegicus-in-adulthood-potential-use-of-the-rat-grimace-scale
#1
(no author information available yet)
OBJECTIVES: One of the systems, which can be prenatally reprogrammed, is the renin-angiotensin-aldosterone system (RAAS). The aim of our experiment was to determine how prenatal activation of RAAS via exposure to elevated levels of angiotensin II (Ang II) influences the rat offspring's emotionality. METHODS: Pregnant female rats were implanted with osmotic minipumps that continually released Ang II and oval object of the same shape and size was implanted into control dams...
May 26, 2017: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28648436/angiotensin-converting-enzyme-inhibitors-and-receptor-blockers-in-heart-failure-and-chronic-kidney-disease-demystifying-controversies
#2
REVIEW
Kader Muneer, Anishkumar Nair
In clinical setting, congestive heart failure (CHF) and chronic kidney disease (CKD) often co-exist in patients due to common underlying predisposing factors. An intricate equilibrium between the cardiovascular and renal system is maintained through rennin angiotensin-aldosterone axis and autonomic nervous system. Consequent to favorable hemodynamic modification, angiotensin converting enzyme inhibitors (ACEI) and angiotensin receptor blocking (ARB) therapy have proven to be an indispensable aspect of heart failure management with morbidity and mortality benefit...
May 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28641212/association-of-gene-polymorphisms-of-four-components-of-renin-angiotensin-aldosterone-system-and-preeclampsia-in-south-african-black-women
#3
M Aung, T Konoshita, J Moodley, P Gathiram
OBJECTIVE: To investigate the association of the gene polymorphisms of: angiotensinogen (AGT), renin (REN), angiotensin II receptor 1 (AT1R) and angiotensin II receptor 2 (AT2R), in the pathogenesis of PE in South African Black women. METHODOLOGY (STUDY DESIGN): 603 pregnant women; 246 normotensive and 357 with PE (early-onset=187, late-onset=170), were recruited. Each study group was subdivided into HIV infected and uninfected groups. The distribution and frequencies of gene polymorphisms of AGT (M235T), REN (C-5312T), AT1R (A1166C) and AT2R (C3123A) were determined in purified DNA by Real Time Polymerase Chain Reaction...
May 18, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28640140/aldosterone-and-renin-in-cardiac-patients-referred-for-catheterization
#4
Paul Erne, Andrea Müller, Gian Paolo Rossi, Burkhardt Seifert, Fabrice Stehlin, Maurice Redondo, Peter T Bauer, Richard Kobza, Therese J Resink, Dragana Radovanovic
Little is known regarding alterations of the renin-angiotensin system in patients referred for cardiac catheterization. Here, we measured plasma levels of active renin and aldosterone in patients referred for cardiac catheterization in order to determine the prevalence of elevated renin, aldosterone, and the aldosterone-renin ratio.A chemiluminescence assay was used to measure plasma aldosterone concentration (PAC) and active renin levels in 833 consecutive patients, after an overnight fasting and without any medication for least 12 hours...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28638984/associations-of-aldosterone-and-renin-concentrations-with-inflammation-the-study-of-health-in-pomerania-and-the-german-conn-s-registry
#5
A Grotevendt, H Wallaschofski, M Reincke, C Adolf, M Quinkler, M Nauck, W Hoffmann, R Rettig, A Hannemann
PURPOSE: Chronic inflammation is an age-independent and body mass index-independent contributor to the development of multi-morbidity. Alterations of the renin-angiotensin-aldosterone system are observed within the context of proinflammatory states. We assessed circulating aldosterone, renin, and inflammatory biomarker concentrations in healthy, normotensive subjects and patients with primary aldosteronism. METHODS: We included 1177 normotensive individuals from the population-based Study of Health in Pomerania (first follow-up, Study of Health in Pomerania-1) and 103 primary aldosteronism patients from the German Conn's Registry...
June 22, 2017: Endocrine
https://www.readbyqxmd.com/read/28625483/silymarin-protects-against-renal-injury-through-normalization-of-lipid-metabolism-and-mitochondrial-biogenesis-in-high-fat-fed-mice
#6
Bin Feng, Ran Meng, Bin Huang, Yan Bi, Shanmei Shen, Dalong Zhu
Obesity is associated with an increased risk of chronic kidney diseases and the conventional treatment with renin-angiotensin-aldosterone system (RAAS) inhibitors is not enough to prevent renal injury and prolong the progression of disease. Recently, silymarin has shown protective effects on renal tissue injury, but the underlying mechanisms remain elusive. The goal of this study was to investigate the potential capacity of silymarin to prevent renal injury during obesity induced by high fat diet (HFD) in mice...
June 15, 2017: Free Radical Biology & Medicine
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
#7
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/28614222/next-generation-sequencing-identifies-pathogenic-and-modifier-mutations-in-a-consanguineous-chinese-family-with-hypertrophic-cardiomyopathy
#8
Xinlin Zhang, Jun Xie, Suhui Zhu, Yuhan Chen, Lian Wang, Biao Xu
Hypertrophic cardiomyopathy (HCM) is a highly heterogeneous disease displaying considerable interfamilial and intrafamilial phenotypic variation, including disease severity, age of onset, and disease progression. This poorly understood variance raises the possibility of genetic modifier effects, particularly in MYBPC3-associated HCM.In a large consanguineous Chinese HCM family, we identified 8 members harboring the MYBPC3 c.3624delC (p.Lys1209Serfs) disease-causing mutation, but with very disparate phenotypes...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28614094/plasma-renin-activity-to-plasma-aldosterone-concentration-ratio-correlates-with-night-time-and-pulse-pressures-in-essential-hypertensive-patients-treated-with-angiotensin-converting-enzyme-inhibitors-at1-blockers
#9
Francesco Spannella, Federico Giulietti, Paolo Balietti, Elisabetta Borioni, Francesca E Lombardi, Maddalena Ricci, Guido Cocci, Laura Landi, Riccardo Sarzani
OBJECTIVES: Angiotensin-converting enzyme inhibitors (ACE-I) and AT1 blockers (ARB) are commonly used antihypertensive drugs, but several factors may affect their effectiveness. We evaluated the associations between ambulatory blood pressure (BP) monitoring (ABPM) parameters and plasma renin activity (PRA)-to-plasma aldosterone concentration (PAC) ratio (RAR) to test renin-angiotensin-aldosterone system inhibition in essential hypertensive patients treated with ACE-I or ARB for at least 12 months...
June 13, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28601914/left-ventricular-ejection-fraction-as-therapeutic-target-is-it-the-ideal-marker
#10
REVIEW
V Katsi, G Georgiopoulos, A Laina, E Koutli, J Parissis, C Tsioufis, P Nihoyannopoulos, D Tousoulis
Heart failure (HF) consists the fastest growing clinical cardiac disease. HF patients are categorized on the basis of underlying left ventricular ejection fraction (LVEF) into HF with preserved EF (HFpEF), reduced LVEF (HFrEF), and mid-range LVEF (HFmrEF). While LVEF is the most commonly used surrogate marker of left ventricular (LV) systolic function, the implementation of two-dimensional echocardiography in estimating this parameter imposes certain caveats on current HF classification. Most importantly, LVEF could fluctuate in repeated measurements or even recover after treatment, thus blunting the borders between proposed categories of HF and enabling upward classification of patients...
June 10, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28600736/blood-pressure-management-in-children-on-dialysis
#11
F Paglialonga, S Consolo, A Edefonti, G Montini
Hypertension is a leading cause of cardiovascular complications in children on dialysis. Volume overload and activation of the renin-angiotensin-aldosterone system play a major role in the pathophysiology of hypertension. The first step in managing blood pressure (BP) is the careful assessment of ambulatory BP monitoring. Volume control is essential and should start with the accurate identification of dry weight, based on a comprehensive assessment, including bioimpedance analysis and intradialytic blood volume monitoring (BVM)...
June 9, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28600074/cellular-distribution-and-interaction-between-extended-renin-angiotensin-aldosterone-system-pathways-in-atheroma
#12
REVIEW
Ali Nehme, Kazem Zibara
The importance of the renin-angiotensin-aldosterone system (RAAS) in the development of atherosclerotic has been experimentally documented. In fact, RAAS components have been shown to be locally expressed in the arterial wall and to be differentially regulated during atherosclerotic lesion progression. RAAS transcripts and proteins were shown to be differentially expressed and to interact in the 3 main cells of atheroma: endothelial cells, vascular smooth muscle cells, and macrophages. This review describes the local expression and cellular distribution of extended RAAS components in the arterial wall and their differential regulation during atherosclerotic lesion development...
May 27, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28598381/renin-inhibition-with-aliskiren-a-decade-of-clinical-experience
#13
REVIEW
Nikolaos-Dimitrios Pantzaris, Evangelos Karanikolas, Konstantinos Tsiotsios, Dimitrios Velissaris
The renin-angiotensin-aldosterone system (RAAS) plays a key role in the pathophysiology of arterial hypertension as well as in more complex mechanisms of cardiovascular and renal diseases. RAAS-blocking agents like angiotensin-converting enzyme (ACE) inhibitors and angiotensin II receptor blockers, have long been key components in the treatment of essential hypertension, heart failure, diabetic nephropathy, and chronic kidney disease, showing benefits well beyond blood pressure reduction. Renin blockade as the first step of the RAAS cascade finally became possible in 2007 with the approval of aliskiren, the first orally active direct renin inhibitor available for clinical use and the newest antihypertensive agent on the market...
June 9, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28597403/resistant-hypertension-mechanisms-and-treatment
#14
REVIEW
Andrew Y Hwang, Eric Dietrich, Carl J Pepine, Steven M Smith
PURPOSE OF REVIEW: Emerging evidence suggests that multiple mechanisms may be responsible for the development of treatment-resistant hypertension (TRH). This review aims to summarize recent data on potential mechanisms of resistance and discuss current pharmacotherapeutic options available in the management of TRH. RECENT FINDINGS: Excess sodium and fluid retention, increased activation of the renin-angiotensin-aldosterone system, and heightened activity of the sympathetic nervous system appear to play an important role in development of TRH...
July 2017: Current Hypertension Reports
https://www.readbyqxmd.com/read/28596512/paricalcitol-as-an-antiproteinuric-agent-can-result-in-the-deterioration-of-renal-and-heart-function-in-a-patient-with-fabry-disease
#15
Tajda Keber, Martin Tretjak, Andreja Cokan Vujkovac, Marija Mravljak, Katja Ravber, Bojan Vujkovac
BACKGROUND Fabry disease is a rare and progressive X-linked inherited disorder of glycosphingolipid metabolism that is due to deficient or absent lysosomal a-galactosidase A activity. Among its other associated signs and symptoms, patients present with renal failure and proteinuria, which are markers of disease progression. Renin-angiotensin-aldosterone system (RAAS) blockers can slow the progression of chronic renal failure and proteinuria. In fact, some studies have shown the beneficial effects of paricalcitol on proteinuria...
June 9, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28592435/gender-differences-in-renin-angiotensin-aldosterone-system-affect-extra-cellular-volume-in-healthy-subjects
#16
Tsjitske J Toering, Christina M Gant, Folkert W Visser, Anne Marijn van der Graaf, Gozewijn D Laverman, A H Jan Danser, Marijke M Faas, Gerjan Navis, A Titia Lely
OBJECTIVE Several studies reported gender differences in aldosterone. It is unknown whether these differences are associated with differences in volume regulation. Therefore, we studied both aldosterone and extracellular volume in men and women on different sodium intakes. METHODS In healthy normotensive men (n=18) and premenopausal women (n=18) we investigated plasma aldosterone, blood pressure, and extracellular volume (125I-iothalamate), during both a low (target intake 50 mmol Na+/day) and high sodium intake (target intake 200 mmol Na+/day) in a cross-over set-up...
June 7, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28589048/the-cushing-reflex-oliguria-as-a-reflection-of-an-elevated-intracranial-pressure
#17
K Leyssens, T Mortelmans, T Menovsky, D Abramowicz, Marcel Th B Twickler, L Van Gaal
Oliguria is one of the clinical hallmarks of renal failure. The broad differential diagnosis is well known, but a rare cause of oliguria is intracranial hypertension (ICH). The actual knowledge to explain this relationship is scarce. Almost all literature is about animals where authors describe the Cushing reflex in response to ICH. We hypothesize that the Cushing reflex is translated towards the sympathetic nervous system and renin-angiotensin-aldosterone system with a subsequent reduction in medullary blood flow and oliguria...
2017: Case Reports in Nephrology
https://www.readbyqxmd.com/read/28584018/renin-angiotensin-aldosterone-system-is-not-involved-in-the-arterial-stiffening-induced-by-acute-and-prolonged-exposure-to-high-altitude
#18
Miriam Revera, Paolo Salvi, Andrea Faini, Andrea Giuliano, Francesca Gregorini, Grzegorz Bilo, Carolina Lombardi, Giuseppe Mancia, Piergiuseppe Agostoni, Gianfranco Parati
This randomized, double-blind, placebo-controlled study was designed to explore the effects of exposure to very high altitude hypoxia on vascular wall properties and to clarify the role of renin-angiotensin-aldosterone system inhibition on these vascular changes. Forty-seven healthy subjects were included in this study: 22 randomized to telmisartan (age, 40.3±10.8 years; 7 women) and 25 to placebo (age, 39.3±9.8 years; 7 women). Tests were performed at sea level, pre- and post-treatment, during acute exposure to 3400 and 5400-m altitude (Mt...
July 2017: Hypertension
https://www.readbyqxmd.com/read/28577874/ras-genetic-variants-in-interaction-with-ace-inhibitors-drugs-influences-essential-hypertension-control
#19
Farzad Heidari, Ramachandran Vasudevan, Siti Zubaidah Mohd Ali, Patimah Ismail, Mohammad Arkani
BACKGROUNDS AND AIMS: Essential Hypertension (EH) is a common disorder associated with increased cardiovascular morbidity and mortality in Malaysia. To investigate how genetic polymorphisms of the renin-angiotensin-aldosterone system (RAS) influence EH control with angiotensin-converting enzyme inhibitor drugs (ACEI). METHODS: A case-control, cross-sectional population-based nested study (n = 142) included hypertensive subjects treated with ACEI drugs, either lisinopril or enalapril (20 mg, once daily) as monotherapy for 24 weeks...
January 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/28576855/sodium-balance-circadian-bp-rhythm-heart-rate-variability-and-intrarenal-renin-angiotensin-aldosterone-and-dopaminergic-systems-in-acute-phase-of-arb-therapy
#20
Yukako Isobe-Sasaki, Michio Fukuda, Yoshiaki Ogiyama, Ryo Sato, Toshiyuki Miura, Daisuke Fuwa, Masashi Mizuno, Tetsuhei Matsuoka, Hiroko Shibata, Hiroyuki Ito, Minamo Ono, Sumiko Abe-Dohmae, Ken Kiyono, Yoshiharu Yamamoto, Hiroyuki Kobori, Makoto Michikawa, Junichiro Hayano, Nobuyuki Ohte
We have revealed that even in humans, activated intrarenal renin-angiotensin-aldosterone system (RAAS) enhances tubular sodium reabsorption to facilitate salt sensitivity and nondipper rhythm of blood pressure (BP), and that angiotensin receptor blocker (ARB) could increase daytime urinary sodium excretion rate (UNaV) to produce lower sodium balance and restore nondipper rhythm. However, the sympathetic nervous system and intrarenal dopaminergic system can also contribute to renal sodium handling. A total of 20 patients with chronic kidney disease (61 ± 15 years) underwent 24-h ambulatory BP monitoring before and during two-day treatment with ARB, azilsartan...
June 2017: Physiological Reports
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