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N Kantaria, I Pantsulaia, I Andronikashvili, G Simonia
It has been known that salt-sensitivity of blood pressure is defined genetically as well as can be developed secondary to either decreased renal function or by influence of other environmental factors. The aim of the study was to evaluate the possible mechanism for the development of salt-sensitive essential hypertension in the population of Georgia. The Case-Control study included 185 subjects, 94 cases with Essential Hypertension stage I (JNC7) without prior antihypertensive treatment, and 91 controls. Salt-sensitivity test was used to divide both case and control groups into salt-sensitive (n=112) and salt-resistant (n=73) subgroups...
September 2016: Georgian Medical News
Javier Díez
Natriuretic peptides (NPs) promote diuresis, natriuresis and vasodilation in early chronic heart failure (CHF), countering renin-angiotensin-aldosterone system (RAAS) and sympathetic nervous system (SNS) overstimulation. Despite dramatic increases in circulating NP concentrations as CHF progresses, their effects become blunted. Increases in diuresis, natriuresis, and vasodilation after administration of exogenous atrial (ANP) or brain (BNP) natriuretic peptides are attenuated in patients with advanced CHF compared with controls...
October 21, 2016: European Journal of Heart Failure
Ali Nehme, Catherine Cerutti, Kazem Zibara
Despite the well-known role of the renin-angiotensin-aldosterone system (RAAS) in atheroma, its global local organization is poorly understood. In this study, we used transcriptomic meta-analysis to reveal the local transcriptional organization and regulation of 37 extended RAAS (extRAAS) genes in atheroma. Expression analysis and hierarchical clustering were done on extRAAS genes in 32 paired early and advanced atherosclerotic lesions. Contrary to receptor-coding transcripts, multiple angiotensin-metabolizing enzymes showed higher expression in advance, in comparison to early lesions...
October 17, 2016: Hypertension
V V Muthusamy
Cardiovascular disease burden is increasing all over the world. The diagnosis of hypertension is considered when a person has persistently elevated BP (Systolic BP more than 140 mmHg and/or Diastolic BP more than 90 mmHg). Dyslipidemia denotes abnormal levels of lipids in the blood (Total Cholesterol >200 mg%, Low density lipoprotein (LDL) >100 mg%, Triglycerides (TGL) >150 mg% and High density lipoprotein (HDL) <40 mg in men and < 50 mg in women. Hypertension and Dyslipidemia constitute the important components of metabolic syndrome as per the definition of NCEP Guidelines-Adult Treatment Panel III (ATP III)...
September 2016: Journal of Hypertension
Zhao Yang, Ma Ruixin, Yu Jing
OBJECTIVE: The role of the renin angiotensin aldosterone system (RAAS) and the gene variants of its components in hypertension have been investigated in various studies. A local tissue-specific renin-angiotensin system (local RAS) has considered as a regulator of cardiovascular physiology and homeostasis. However, no report has described the vagina protective efficacy of RAS inhibitors including ARB and ACEI. Therefore, we aim to investigate the effect of ARBs and ACEI on the vagina and cardiac expression of the local renin-angiotensin components...
September 2016: Journal of Hypertension
ByungSu Yoo
Heart failure (HF) represents a significant healthcare issue because of its ever-increasing prevalence, poor prognosis and complex pathophysiology. The cornerstone of modern drug therapy in chronic HF is the inhibition of neurohormonal activation that plays a crucial role in the pathophysiology of HF development and progression and, more specifically, of the renin-angiotensin-aldosterone system (RAAS) and the sympathetic nervous system. LCZ696 is a first-in-class, angiotensin receptor NEP inhibitor (ARNI) that consists of a supramolecular complex of a molecule of the ARB valsartan in combination with a molecule of the NEP inhibitor prodrug AHU377 (also known as sacubitril)...
September 2016: Journal of Hypertension
Zhanna Kobalava
The burden of cardiovascular diseases (CVD) in general and heart failure (HF) in particular continues to increase worldwide. CVD are major contributors to death and morbidity and recognized as important drivers of healthcare expenditure. Chronic overactivity of the renin-angiotensin-aldosterone system (RAAS) plays a key role in human hypertension and HF pathophysiology. RAAS is fundamental in the overall regulation of cardiovascular homeostasis through the actions of hormones, which regulate vascular tone, and specifically blood pressure through vasoconstriction and renal sodium and water retention...
September 2016: Journal of Hypertension
Alexander Danser
Blockade of the renin-angiotensin-aldosterone system (RAAS) can be accomplished at the level of the angiotensin-generating enzymes renin and angiotensin-converting enzyme (ACE; using renin inhibitors or ACE inhibitors), the type 1 angiotensin II (AT1) receptor or mineralocorticoid receptor (MR; using angiotensin receptor blockers [ARBs] or MR blockers) and/or renin release (using beta-blockers). Several of these drugs are often combined-for example in heart failure-but such approaches may ultimately lead to RAAS annihilation with adverse consequences such as hypotension, renal dysfunction and hyperkalaemia...
September 2016: Journal of Hypertension
Xiaodong Li, Mona Hong, Dingliang Zhu, Pingjin Gao
OBJECTIVE: The sympathetic nervous system interacts with the renin-angiotensin-aldosterone system (RAAS) contributing to cardiovascular diseases. In this study, we sought to determine if renal denervation (RDN) inhibits aldosterone expression and associated cardiovascular pathophysiological changes in angiotensin II (Ang II)-induced hypertension. DESIGN AND METHOD: Bilateral RDN or SHAM operation was performed before chronic 14-day Ang II infusion (200 ng/kg/min) in male Sprague-Dawley rats...
September 2016: Journal of Hypertension
Matthew Weir, George L Bakris, Coleman Gross, Martha R Mayo, Dahlia Garza, Jinwei Yuan, Lance Berman, Gordon H Williams
OBJECTIVE: Elevated serum aldosterone can be vasculotoxic and facilitates cardiorenal damage. Renin-angiotensin-aldosterone inhibitors (RAASi) reduce serum aldosterone levels and/or block its effects but can cause hyperkalemia (HK). Patiromer, a nonabsorbed potassium binder, decreases serum potassium (K) in CKD patients on RAASi. We examined the effect of patiromer on serum aldosterone levels, plasma renin activity (PRA), systolic (SBP) and diastolic blood pressure (DBP), and urinary albumin-to-creatinine ratio (UACR) in CKD patients on RAASi with HK (serum K 5...
September 2016: Journal of Hypertension
Kaoru Yamashita, Atsuhiro Ichihara, Kentaro Ito, Naohiro Yoshida, Fumiko Mitani, Jin Endo, Motoaki Sano, Keiichi Fukuda, Satoshi Morimoto
OBJECTIVE: Numerous clinical trials demonstrated that renin-angiotensin-aldosterone system (RAAS) was involved in the pathogenesis of hypertension-induced heart failure. While RAS is a major machinery required for aldosterone production, multiple minor systems, including catecholamine, could give rise to the aberrant aldosterone production beyond the RAS activation. We investigated the mechanism underlying the RAS-independent aldosterone production in heart failure. DESIGN AND METHOD: Dahl-salt sensitive rats fed high salt diet developed malignant hypertension, resulting in heart failure with inappropriately increased plasma aldosterone level...
September 2016: Journal of Hypertension
Stephen Harrap, Katrina Scurrah, Angela Lamantia, Justine Ellis
OBJECTIVE: Genes encoding key elements of the renin-angiotensin-aldosterone system (RAAS) cascade have been previously but inconsistently associated with blood pressure. Sex-dependency might be important here and functional genetic polymorphisms might exhibit epistatic effects. DESIGN AND METHOD: We assessed variation in the genes encoding renin (REN), angiotensinogen (AGT), angiotensin converting enzyme (ACE), angiotensin II type 1 receptor (AGTR1) and aldosterone synthase (CYP11B2)...
September 2016: Journal of Hypertension
Ami Kwon, Woo-Baek Chung, Tae-Hoon Kim, Suk Min Suh, Eun Ho Chu, Sung-Won Jang, GeeHee Kim, Sang Hyun Ihm
OBJECTIVE: There are many reports about white coat hypertension (WCH), still the clinical significance and pathophysiology of WCH is ambiguous. The aim of this study was to find out the difference of RAAS activity in WCH compared with the essential hypertension (EH) group, which could suggest the role of RAAS activity in the development of WCH. DESIGN AND METHOD: Never treated hypertension patients who visited 8 hospitals of The Catholic University of Korea from January 2011 through July 2012 were enrolled...
September 2016: Journal of Hypertension
Rhian M Touyz
Pathophysiological mechanisms contributing to hypertension include injury to small arteries, characterised by endothelial dysfunction, vascular remodeling, fibrosis and inflammation, (so called hypertensive vascular phenotype). These changes are initially adaptive but in the long term become maladaptive leading to vascular damage and loss of function, particularly important in small resistance arteries, critically involved in the regulation of peripheral vascular resistance and consequently in blood pressure control...
September 2016: Journal of Hypertension
Masatsugu Horiuchi
Hypertensive patients have greater chances of such cardiovascular events as stroke, coronary heart disease, heart or renal failure, peripheral artery disease, and dementia. It is also well recognized that diabetes increases the cardiovascular risks in concert with hypertension. Therefore, main goals for an innovation of anti-hypertensive therapy would be to achieve further risk reduction by targeting the functional, metabolic, and structural alterations associated with hypertension. Professors Dzau and Braunwald et al proposed the concept of "the cardiovascular disease continuum" in 1991, and that hypertension may trigger the chain of events, leading to end-stage heart disease; however, this concept was quite new at that time, and there was some discussion whether "the cardiovascular disease continuum" is true or not...
September 2016: Journal of Hypertension
Gnanasambandan Ramanathan, Santu Ghosh, Ramprasad Elumalai, Soundararajan Periyasamy, Bhaskar V K S Lakkakula
BACKGROUND & OBJECTIVES: Autosomal dominant polycystic kidney disease (ADPKD) is an inherited systemic disorder, characterized by the fluid filled cysts in the kidneys leading to end stage renal failure in later years of life. Hypertension is one of the major factors independently contributing to the chronic kidney disease (CKD) progression. The renin-angiotensin aldosterone system (RAAS) genes have been extensively studied as hypertension candidate genes. The aim of the present study was to investigate the role of angiotensin converting enzyme tagging - single nucleotide polymorphisms (ACE tag-SNPs) in progression of CKD in patients with ADPKD...
June 2016: Indian Journal of Medical Research
Marcin Michalak, Andrzej Cacko, Agnieszka Kapłon-Cieślicka, Monika Budnik, Przemysław Stolarz, Grzegorz Opolski, Marcin Grabowski
BACKGROUND: Single-lead for implantable cardioverter-defibrillator (ICD) with floating atrial sensing dipole is a new diagnostic tool with the potential advantage in terms of arrhythmia discrimination. We sought to determine whether right heart size and dipole position influence atrial sensing. METHODS: Atrial sensing amplitude (AS) was measured during implantation (PP, periprocedural), predischarge (IHFU, in-hospital follow-up) and 3-6 months after the procedure (AFU, ambulatory follow-up)...
October 17, 2016: Cardiology Journal
Gera D Te Raa, Arnon P Kater
Despite the availability of novel targeted agents, TP53 defects remain the most important adverse prognostic factor in chronic lymphocytic leukemia (CLL). Detection of deletion of TP53 locus (17p deletion) by fluorescent in situ hybridization (FISH) has become standard and performed prior to every line of treatment as the incidence dramatically increases as relapses occur. As monoallelic mutations of TP53 equally affect outcome, novel methods are being developed to improve detection of TP53 defects and include next-generation sequencing (NGS) and functional assays...
March 2016: Best Practice & Research. Clinical Haematology
J M van Rooyen, M Poglitsch, H W Huisman, Cmc Mels, R Kruger, L Malan, S Botha, L Lammertyn, L Gafane, A E Schutte
OBJECTIVE: The objective of this study was to make use of a quantitative and qualitative approach comparing the systemic renin-angiotensin system (RAS) of hypertensive black and white African men by using RAS equilibrium analysis. MATERIALS AND METHODS: This sub-study involved 23 black (n = 15) and white (n = 8) hypertensive men aged 39.5-41 years, living in the North West Province of South Africa. The RAS-Fingerprinting was determined with LC-MS/MS quantification of angiotensin peptides...
October 2016: Journal of the Renin-angiotensin-aldosterone System: JRAAS
F Borghi, B Sevá-Pessôa, D M Grassi-Kassisse
Cardiometabolic diseases are linked to a cluster of modifiable factors, including risk factors closely related to central adiposity. Chronic renin-angiotensin-aldosterone system (RAAS) activation has far-reaching effects on cardiometabolic risk and is a substantial contributor to this clinical condition. RAAS components are locally expressed in the vessels and adipose tissue. This review appoints RAAS, through the classical and the alternative view, as the main mediator of the cross-talk in cardiometabolic syndrome...
October 12, 2016: Cell and Tissue Research
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