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https://www.readbyqxmd.com/read/27925380/angiotensin-converting-enzyme-2-polymorphisms-and-postexercise-hypotension-in-hypertensive-medicated-individuals
#1
Karla F Goessler, Marcos D Polito, Gloria de F Mota, Edilamar M de Oliveira, Véronique A Cornelissen
The renin-angiotensin aldosterone system (RAAS) is associated with diverse physiological responses and adaptations to exercise. The angiotensin converting enzyme (ACE) 2 has vasodilatory effects, which might be associated with the blood pressure (BP) responses to acute exercise. The aim of this study was to investigate the role of ACE2 polymorphisms in postexercise hypotension (PEH). Thirty-four medicated hypertensive (61·3 ± 1·7 years, 76·1 ± 2·7 kg, 160 ± 1·6 cm) men (n = 12) and women (n = 22), participated in a control and a moderate intensity exercise session in a randomized order...
December 7, 2016: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/27918529/hsd2-neurons-in-the-hindbrain-drive-sodium-appetite
#2
Brooke C Jarvie, Richard D Palmiter
Sodium-depleted animals develop an appetite for aversive concentrations of sodium. Here we show that chemogenetic activation of aldosterone-sensitive neurons that express 11β-hydroxysteroid dehydrogenase type 2 (HSD2) in the nucleus of the solitary tract is sufficient to drive consumption of sodium-containing solutions in mice, independently of thirst or hunger. These HSD2-positive neurons are necessary for full expression of sodium appetite and have distinct downstream targets that are activated during sodium depletion...
December 5, 2016: Nature Neuroscience
https://www.readbyqxmd.com/read/27917596/plasma-adrenocorticotropic-hormone-but-not-aldosterone-is-correlated-with-blood-pressure-in-patients-with-aldosterone-producing-adenomas
#3
Hiroki Kobayashi, Akira Haketa, Ueno Takahiro, Hiromasa Otsuka, Sho Tanaka, Yoshinari Hatanaka, Yukihiro Ikeda, Masanori Abe, Noboru Fukuda, Masayoshi Soma
Although plasma aldosterone concentration (PAC) varies depending on primary aldosteronism (PA) subtypes, patients with different subtypes may have similar blood pressure (BP). The authors hypothesized that hormones other than aldosterone might influence BP in PA patients. A total of 73 PA cases, including 30 cases of aldosterone-producing adenomas (APAs), 29 cases of bilateral hyperaldosteronism, and 24 control cases of essential hypertension were enrolled retrospectively. The authors examined the levels of aldosterone, cortisol, renin, and adrenocorticotropic hormone (ACTH) measured at 12 am, 6 am, 12 pm, and 6 pm and BP in the early morning (6 am to 7 am), late morning (9 am to 11 am), and early evening (5 pm to 7 pm)...
December 5, 2016: Journal of Clinical Hypertension
https://www.readbyqxmd.com/read/27917573/role-of-adrenocorticotropic-hormone-in-essential-hypertension-and-primary-aldosteronism
#4
Decio Armanini, Alessandra Andrisani, Guido Ambrosini, Luciana Bordin, Chiara Sabbadin
No abstract text is available yet for this article.
December 5, 2016: Journal of Clinical Hypertension
https://www.readbyqxmd.com/read/27915044/a-novel-aldosterone-synthase-inhibitor-ameliorates-mortality-in-pressure-overload-mice-with-heart-failure
#5
Shinji Furuzono, Masaki Meguro, Satoru Miyauchi, Shinichi Inoue, Tsuyoshi Homma, Keisuke Yamada, Yoh-Ichi Tagawa, Futoshi Nara, Takahiro Nagayama
It has been elucidated that mineralocorticoid receptor antagonists reduce mortality in patients with congestive heart failure and post-acute myocardial infarction. A direct inhibition of aldosterone synthase (CYP11B2) is also expected to have therapeutic benefits equal in quality to mineralocorticoid receptor antagonists in terms of reducing mineralocorticoid receptor signaling. Therefore, we have screened our chemical libraries and identified a novel and potent aldosterone synthase inhibitor, 2,2,2-trifluoro-1-{4-[(4-fluorophenyl)amino]pyrimidin-5-y}-1-[1-(methylsulfonyl)piperidin-4-yl]ethanol (compound 1), by lead optimization...
November 30, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27914612/dexamethasone-induced-diuresis-is-associated-with-inhibition-of-the-renin-angiotensin-aldosterone-system-in-rats
#6
Chao Liu, Ning Ge, Jian-Long Zhai, Jian-Xin Zhang
In heart failure (HF) patients, diuretics remain the cornerstone of therapy to relieve fluid retention. However, the resulting volume loss activates the renin-angiotensin-aldosterone system (RAAS), which blunts the decline in volume depletion and blood pressure. RAAS activation, in turn, compromises the diuretic decongesting effect. Although corticosteroids can induce potent diuresis in HF patients, the effects of corticosteroids on RAAS activation remain unclear. Therefore, we assessed the effects of dexamethasone (Dex) on urine output and plasma angiotensin II and aldosterone levels in rats following water deprivation-induced dehydration, following induction of chronic HF (CHF), and following induction of CHF and volume expansion therapy...
December 2016: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/27913606/acute-administration-of-acyl-but-not-desacyl-ghrelin-decreases-blood-pressure-in-healthy-humans
#7
Cecilia J Zhang, Martin Bidlingmaier, Mekibib Altaye, Laura C Page, David D'Alessio, Matthias H Tschöp, Jenny Tong
OBJECTIVE: To compare the effects of acyl ghrelin (AG) and desacyl ghrelin (DAG) on blood pressure (BP), heart rate (HR) and other autonomic parameters in healthy humans and to elucidate the hormonal mechanisms through which AG could exert its cardiovascular effects. DESIGN: Seventeen healthy participants underwent frequent monitoring of systolic (sBP) and diastolic blood pressure (dBP), HR, respiratory rate (RR) and body surface temperature (Temp) during continuous infusion of AG, DAG, combined AG + DAG or saline control before and during an IV glucose tolerance test on 4 separate days...
February 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/27913572/very-low-density-lipoprotein-vldl-induced-signals-mediating-aldosterone-production
#8
Ying-Ying Tsai, William E Rainey, Wendy B Bollag
Aldosterone, secreted by the adrenal zona glomerulosa, enhances sodium retention, thus increasing blood volume and pressure. Excessive production of aldosterone results in high blood pressure, and contributes to cardiovascular and renal disease, stroke, and visual loss. Hypertension is also associated with obesity, which s correlated with other serious health risks as well. Although weight gain is associated with increased blood pressure, the mechanism by which excess fat deposits increase blood pressure remains unclear...
December 2, 2016: Journal of Endocrinology
https://www.readbyqxmd.com/read/27912902/evolution-of-the-clinical-profile-of-patients-with-acute-heart-failure-treated-in-spanish-emergency-departments
#9
R Escoda, Ò Miró, F J Martín-Sánchez, J Jacob, P Herrero, V Gil, J M Garrido, M J Pérez-Durá, M Fuentes, P Llorens
OBJECTIVE: To analyse the changes in epidemiology, outpatient and emergency department clinical care, and outcomes of patients treated for acute heart failure (AHF) in Spanish hospital emergency departments (HEDs) between 2007 and 2014. METHOD: A multicentre cohort study was conducted that consecutively included patients with AHF diagnosed in 9HEDs during 4 periods (2007, 2009, 2011 and 2014). The study analysed the changes observed in 20 variables corresponding to baseline data, outpatient care and emergency care data and outcome data...
November 29, 2016: Revista Clínica Española
https://www.readbyqxmd.com/read/27910864/renin-angiotensin-aldosterone-system-gene-polymorphisms-in-gestational-hypertension-and-preeclampsia-a-case-control-gene-association-study
#10
Xun Li, Hongzhuan Tan, Shujin Zhou, Shimin Hu, Tianyi Zhang, Yangfen Li, Qianru Dou, Zhiwei Lai, Fenglei Chen
Pregnancy-induced hypertension (PIH, including preeclampsia [PE] and gestational hypertension [GH]) and cardiovascular diseases (CVDs) have some metabolic changes and risk factors in common. Many studies have reported associations between single nucleotide polymorphisms (SNPs) of renin-angiotensin-aldosterone system (RAAS) genes and CVDs (particularly hypertension), and their findings have provided candidate SNPs for research on genetic correlates of PIH. We explored the association between hypertension-related RAAS SNPs and PIH in a Chinese population...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27909476/atrial-fibrillation-and-risk-of-dementia-cognitive-decline
#11
REVIEW
Anand D Shah Md, Faisal M Merchant Md, David B Delurgio Md
Emerging evidence suggests a link between atrial fibrillation and subsequent development of dementia. While a majority of risk can be attributed to cardioembolic stroke secondary to atrial fibrillation, additional risk is apparent, and may be driven by vascular inflammation and changes in cerebral perfusion. Medical therapies including anticoagulation, statin therapy, and angiotensin-renin-aldosterone axis antagonists may reduce dementia risk. Procedural therapies such as atrial fibrillation catheter ablation and left atrial appendage closure may also prove to be important mediators of acute and long-term risk...
February 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27906842/spironolactone-and-the-risk-of-urinary-tract-cancer-in-patients-with-hypertension-a-nationwide-population-based-retrospective-case-control-study
#12
Ya-Wen Chuang, Mei-Ching Yu, Shih-Ting Huang, Cheng-Kuang Yang, Cheng-Hsu Chen, Ying-Chih Lo, Cheng-Li Lin, Kuo-Hsiung Shu, Tung-Min Yu, Chia-Hung Kao
AIM: This was a nationwide study by National Health Insurance Research Database to investigate the risk of urinary tract cancers (UTCs) for renin-angiotensin-aldosterone system inhibitors including spironolactone. METHODS: A total of 32 167 UTC patients with hypertension were enrolled in the National Health Insurance program between 2005 and 2011. RESULTS: Among different subclasses of renin-angiotensin-aldosterone system inhibitors, the adjusted odds ratio (OR) for UTC risk was 1...
January 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/27906749/sodium-and-potassium-in-the-pathogenesis-of-hypertension-focus-on-the-brain
#13
Horacio J Adrogué, Nicolaos E Madias
PURPOSE OF REVIEW: Primary hypertension is characterized by Na excess and K deficit in the body, which together are key to its pathogenesis. These derangements work jointly in the brain and the peripheral vascular wall to establish hypertension. In this review, we highlight recent evidence describing the central mechanisms through which Na surfeit and K deficit enhance sympathetic nerve activity, thereby raising peripheral vascular resistance and generating hypertension. RECENT FINDINGS: Animal studies point to a small increase in plasma and cerebrospinal fluid (CSF) [Na], a small decrease in CSF [K], and increased levels of circulating angiotensin II, aldosterone, and endogenous ouabain as the central signals evoking hypertension...
December 2, 2016: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/27904025/early-raas-blockade-exerts-renoprotective-effects-in-autosomal-recessive-alport-syndrome
#14
Nao Uchida, Naonori Kumagai, Kandai Nozu, Xue Jun Fu, Kazumoto Iijima, Yoshiaki Kondo, Shigeo Kure
Alport syndrome is a progressive renal disease caused by mutations in COL4A3, COL4A4, and COL4A5 genes that encode collagen type IV alpha 3, alpha 4, and alpha 5 chains, respectively. Because of abnormal collagen chain, glomerular basement membrane becomes fragile and most of the patients progress to end-stage renal disease in early adulthood. COL4A5 mutation causes X-linked form of Alport syndrome, and two mutations in either COL4A3 or COL4A4 causes an autosomal recessive Alport syndrome. Recently, renin-angiotensin-aldosterone system (RAAS) blockade has been shown to attenuate effectively disease progression in Alport syndrome...
2016: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27902632/high-sensitive-c-reactive-protein-in-primary-aldosteronism
#15
Masayuki Tanemoto
No abstract text is available yet for this article.
January 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/27902451/vitamin-d-and-male-reproductive-system
#16
Pablo R Costanzo, Pablo Knoblovits
Vitamin D deficiency is a highly prevalent worldwide condition and affects people of all ages. The most important role of vitamin D is the regulation of intestinal calcium absorption and metabolism of calcium and phosphorus to maintain muscle and bone homeostasis. Furthermore, in recent years it has been discovered that the vitamin D receptor (VDR) is widely distributed in many organs and tissues where vitamin D can perform other actions that include the modulation of the immune response, insulin secretion, anti-proliferative effect on cells of vascular smooth muscle, modulation of the renin-angiotensin-aldosterone system and regulates cell growth in several organs...
December 1, 2016: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/27900954/renin-angiotensin-aldosterone-system-blockade-in-diabetic-kidney-disease-a-critical-and-contrarian-point-of-view
#17
REVIEW
Mohamed E Elrggal, Shaaban M S Ahmed, Meguid El Nahas
Diabetes mellitus is the most common cause of end-stage renal disease (ESRD) worldwide. Diabetic kidney disease (DKD) is associated with high morbidity and cardiovascular mortality. A number of guidelines and recommendations have been issued over the years recommending the use of renin-angiotensin-aldosterone system (RAAS) blockade in the management of DKD. This critical analysis takes a contrarian view, based on a selection of key clinical trials in the field, to argue that albuminuria should not be considered a target for treatment but instead a surrogate marker of DKD progression...
November 2016: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/27900865/-treatment-of-dyslipidemia-is-here-still-place-for-cetp-inhibitors
#18
Ján Murín, Miroslav Pernický, Soňa Kiňová
In the treatment of dyslipidemias about 5-6 years back a new class of drugs emerged, CETP (cholesteryl ester transfer protein)-inhibitors. Their benefit was due to an increase of HDL-cholesterol (HDL-C) serum levels. This treatment mode was supported by epidemiological and clinical studies, as people with high serum HDL-C levels suffered less from cardiovascular (CV) events. Three studies with CETP inhibitors (ILLUMINATE with torcetrapib, dal-OUTCOMES with dalcetrapib and ACCELERATE with evacetrapib) were unfortunately negative, and torcetrapib was even harmful to patients due to an increase of aldosterone serum levels...
2016: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/27900368/whole-exome-sequencing-reveals-an-inherited-r566x-mutation-of-the-epithelial-sodium-channel-%C3%AE-subunit-in-a-case-of-early-onset-phenotype-of-liddle-syndrome
#19
Linda M Polfus, Eric Boerwinkle, Richard A Gibbs, Ginger Metcalf, Donna Muzny, Narayanan Veeraraghavan, Megan Grove, Sanjay Shete, Stephanie Wallace, Dianna Milewicz, Neil Hanchard, James R Lupski, Syed Shahrukh Hashmi, Monesha Gupta-Malhotra
To comprehensively evaluate a European-American child with severe hypertension, whole-exome sequencing (WES) was performed on the child and parents, which identified causal variation of the proband's early-onset disease. The proband's hypertension was resistant to treatment, requiring a multiple drug regimen including amiloride, spironolactone, and hydrochlorothiazide. We suspected a monogenic form of hypertension because of the persistent hypokalemia with low plasma levels of renin and aldosterone. To address this, we focused on rare functional variants and indels, and performed gene-based tests incorporating linkage scores and allele frequency and filtered on deleterious functional mutations...
November 2016: Cold Spring Harbor Molecular Case Studies
https://www.readbyqxmd.com/read/27899856/effect-of-spironolactone-on-plasma-apelin-12-levels-in-patients-with-chronic-systolic-heart-failure
#20
Mustafa Topuz, Mehmet Cosgun, Oğuz Akkuş, Atilla Bulut, Omer Sen, Ayşe Nur Topuz, Murat Caylı
BACKGROUND: The aim of this study was to determine whether spironolactone therapy has an effect on serum apelin-12 levels in heart failure with reduced ejection fraction (HFrEF) patients. METHODS: Eighty outpatients previously diagnosed with HFrEF were enrolled in the current study. Included patients were taking only standard heart failure therapy (ST) (angiotensin converting enzyme or angiotensin receptor blocker, beta-blockers, loop diuretics and anticoagulant or antiagregan agents) without a mineralocorticoid receptor antagonists (MRA) because of its side effects, and were designated the non-MRA group; those patients taking 25 mg/daily spironolactone in addition to the ST were deemed the MRA group...
November 2016: Acta Cardiologica Sinica
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