Abstract:
OBJECTIVE:In essential hypertensive patients, blunted renal plasma flow responsiveness to angiotensin II suggests a pathologic increase in angiotensin II in the kidneys. This blunting has been associated with the angiotensinogen 235TT genotype. As several measures of renal function decline with age, we sought to determine the interaction of age and genotype on this intermediate phenotype. DESIGN AND METHODS:Three hundred fifteen participants had renal plasma flow response to subpressor doses of angiotensin II (3 ng/kg/min) measured by para-aminohippuric acid clearance in high-sodium balance. Individuals were divided by median age into young (<45 years) and older (> or =45 years) sets. A subset of participants was also studied after administration of captopril. RESULTS:Age, baseline renal plasma flow, BMI and angiotensinogen 235 genotype independently predicted renal plasma flow responsiveness to angiotensin II. Renal plasma flow responses were lower in older individuals than younger (P = 0.03, hypertensive patients; P = 0.004, normotensive individuals). Both hypertensive patients and normotensive individuals carrying either angiotensinogen 235MM or MT genotypes showed this inverse association (P = 0.005, hypertensive patients; P = 0.05, normotensive individuals). However, among angiotensinogen 235TT homozygotes the pattern differed: normotensive individuals had a fall in renal vascular responsiveness with age (P = 0.01) but hypertensive patients did not (P = 0.72). Young hypertensive patients already showed blunted responses. Of all genotype subsets, only angiotensinogen 235TT hypertensive patients showed enhancement (P = 0.03) of the renal vascular responsiveness to angiotensin II after captopril. CONCLUSION:The angiotensinogen 235TT variant predicts premature blunting of renal vascular responsiveness among young hypertensive patients. This abnormal response is corrected by angiotensin-converting enzyme inhibition. This first report of age and genotype interaction may have important implications in the profiling and management of essential hypertension.
journal_name
J Hypertensjournal_title
Journal of hypertensionauthors
Patel TV,Williams GH,Fisher NDdoi
10.1097/HJH.0b013e3282ffb417subject
Has Abstractpub_date
2008-07-01 00:00:00pages
1353-9issue
7eissn
0263-6352issn
1473-5598pii
00004872-200807000-00015journal_volume
26pub_type
杂志文章abstract:OBJECTIVE:Underlying pathophysiology of orthostatic hypotension has been poorly understood. We hypothesized that aortic pulse pressure (APP) reflecting aortic stiffness may be involved in the development of orthostatic hypotension. METHODS:A total of 200 patients (age 64.3 ± 10.9 years, 62.5% men) who underwent invasi...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002113
更新日期:2019-10-01 00:00:00
abstract:OBJECTIVE:The optimal time to initiate antihypertensive therapy among patients with acute ischemic stroke remains uncertain. We tested the effects of blood pressure reduction among patients with acute ischemic stroke according to time from onset to initiation of antihypertensive treatment. METHODS:We randomly assigned...
journal_title:Journal of hypertension
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/HJH.0000000000001288
更新日期:2017-06-01 00:00:00
abstract:BACKGROUND:Some patients with essential hypertension manifest greater than normal urinary excretion of albumin (UAE). Authors of a few retrospective studies have suggested that there is an association between microalbuminuria and cardiovascular risk. OBJECTIVE:To evaluate whether microalbuminuria is associated with a ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199816090-00014
更新日期:1998-09-01 00:00:00
abstract:OBJECTIVE:To investigate the association between hypertension and musculoskeletal complaints among men and women selected by a population-based sample. METHODS:A cross-sectional study, with participants selected using a multistage sampling procedure and interviewed at home, was conducted to investigate the association...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3283588268
更新日期:2012-11-01 00:00:00
abstract::A10 vascular smooth muscle cells were placed in a flow chamber and exposed to the circulation of foetal calf serum at different rates and pressures. Under unidirectional laminar flow, physiological flow rates and pressures had almost no effect on internal sodium content. Indeed, pressure values greater than 150 mmHg w...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199111000-00008
更新日期:1991-11-01 00:00:00
abstract:BACKGROUND:The usefulness of the hypertensive retinopathy classification by Keith-Wagener-Barker (KWB) in clinical practice remains controversial. The simplified Mitchell-Wong grading, combining the two initial KWB' grades in one stage, is proposed as an alternative method; both systems are poorly validated regarding t...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000702
更新日期:2015-11-01 00:00:00
abstract::A unique tissue kallikrein-binding protein was identified and partially characterized in the brain and serum of Sprague-Dawley rats and in the serum-free conditioned media of mouse anterior pituitary cells (AtT 20) and rodent neuroblastoma x glioma hybrids (NG108-15). Kallikrein and kallikrein-binding protein(s) form ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198807000-00006
更新日期:1988-07-01 00:00:00
abstract:OBJECTIVE:To investigate the relationship between hematocrit, blood pressure and other known cardiovascular risk factors. DESIGN:The Tecumseh Blood Pressure Study includes a cohort of subjects of average age 29.5 years (346 male, 277 female) who reside in Tecumseh, Michigan, USA. METHODS:The body weight; home, work a...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1994-04-01 00:00:00
abstract::An Na+,K+-ATPase inhibitor possessing inhibitory activity against the specific binding of ouabain to Na+,K+-ATPase has been purified from the plasma of acutely saline-infused hogs. The purification was performed by a combination of Amberlite XAD-2 adsorption chromatography and five steps of high-pressure liquid chroma...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198704000-00014
更新日期:1987-04-01 00:00:00
abstract:OBJECTIVES AND DESIGN:Angiotensinogen (AGT) gene variants influence angiotensinogen plasma levels in children and young adults. The angiotensinogen promoter (-6)A variant facilitates gene transcription in human tissues and it has been associated with high blood pressure in older adults. A young adult population can be ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200112000-00009
更新日期:2001-12-01 00:00:00
abstract:OBJECTIVES:The global morbidity and mortality related to hypertension and associated disorders increases continuously and novel therapeutic strategies are still in high demand. Increasing evidence suggests the important role in blood pressure regulation of cytochrome P-450-dependent metabolites of arachidonic acid. Epo...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002462
更新日期:2020-09-01 00:00:00
abstract::The contribution of deoxycorticosterone acetate (DOCA) and salt to arterial pressure and hypertension-related arterial wall changes was assessed in Wistar rats. One group of two-kidney DOCA-treated animals was given a high salt diet and another group a low salt diet. After 16 weeks of treatment, the animals on low sal...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198610000-00007
更新日期:1986-10-01 00:00:00
abstract:OBJECTIVES:Several studies have shown lower carotid-femoral pulse wave velocity (cfPWV) levels in women compared to men, a difference that could partially explain the increased longevity in women. However, these studies have been performed in industrial countries while few data are available in emerging populations. We...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3283639460
更新日期:2013-11-01 00:00:00
abstract:OBJECTIVE:To investigate the role of angiotensin II in the pathogenesis of hyperinsulinemia-induced hypertension in rats. MATERIALS AND METHODS:Chronic hyperinsulinemia was achieved by infusing insulin (3 mU/kg per min) subcutaneously by an osmotic minipump for 6 weeks. An angiotensin converting enzyme inhibitor (fosi...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199816120-00009
更新日期:1998-12-01 00:00:00
abstract:OBJECTIVE:Insulin-mediated vasodilation has been shown to be impaired with hypertension and aggravated by dietary sodium restriction. Whether vascular insulin resistance in this setting could be improved by antihypertensive therapy was unknown. Therefore, we determined the effect of therapy with an angiotensin-converti...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00004872-200101000-00015
更新日期:2001-01-01 00:00:00
abstract:OBJECTIVE:The contribution of salt intake to the pathogenesis of hypertension holds longstanding interest. Recent studies employed the sensitivity of blood pressure (BP) to salt intake as an intermediate phenotype. The validity of this approach relative to the homogeneity of sodium-sensitive hypertension was investigat...
journal_title:Journal of hypertension
pub_type: 杂志文章,多中心研究
doi:10.1097/00004872-200305000-00020
更新日期:2003-05-01 00:00:00
abstract::Hypertension is associated with thickening of the wall of resistance vessels, but the cellular or genetic basis of this is unclear. Cell proliferation and intracellular alkalinization via increased Na+/H+ exchange are linked in the response of tissues to growth factors. To define a possible cellular basis for vascular...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198906000-00006
更新日期:1989-06-01 00:00:00
abstract:OBJECTIVE:To determine the plasma cofactor which is required by diuretics (hydrochlorothiazide, chlorthalidone, indapamide, and furosemide) for direct vasorelaxant effects in vitro. DESIGN:A randomized, double-blind, vehicle-control design was used to avoid experimenter bias. METHODS:We plotted concentration-response...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199816060-00011
更新日期:1998-06-01 00:00:00
abstract:OBJECTIVES:We hypothesized that addressing the 24-h relationship between RR interval and systolic arterial pressure (SAP) during ambulatory blood pressure monitoring could detect alterations in circadian arterial pressure and heart rate profile and could also be linked to the ambulatory arterial stiffness index. METHO...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e32832a12c7
更新日期:2009-06-01 00:00:00
abstract:OBJECTIVE:To test the hypothesis that genetically determined alterations of maternal immune tolerance to a foetal semi-allograft are important for the pathogenesis of hypertensive disorders in pregnancy. DESIGN:A genetic association study was performed to analyse the impact of genetic polymorphisms known to be involve...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000188732.52722.5a
更新日期:2005-12-01 00:00:00
abstract:BACKGROUND:Elevated plasma glucocorticoid level is an independent predictor of increased mortality risk in chronic heart failure, but local biosynthesis and pathophysiological roles of glucocorticoids in the heart remain unclear. METHODS:Dahl salt-sensitive rats on high-salt diet and mice with transthoracic aortic ban...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e328326cb04
更新日期:2009-05-01 00:00:00
abstract:OBJECTIVE:To compare the effects of a cardioselective beta-blocker (nebivolol) with those of an angiotensin-converting enzyme inhibitor (enalapril) on parameters of insulin sensitivity, peripheral blood flow and arterial stiffness during one extended glucose clamp experiment. DESIGN:A randomized, double-blind crossove...
journal_title:Journal of hypertension
pub_type: 杂志文章,随机对照试验
doi:10.1097/01.hjh.0000234121.48272.67
更新日期:2006-07-01 00:00:00
abstract:INTRODUCTION:Chronic kidney disease (CKD) in which the disease cannot be attributed to any known cause is named CKD of uncertain aetiology (CKDu). The main aims of this analysis were to estimate the prevalence of hypertension and to identify the associated factors in a rural community vulnerable to CKDu and to identify...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002107
更新日期:2019-09-01 00:00:00
abstract:OBJECTIVES:Mechanisms involved in hypertension in homozygous mice for the defective endothelial nitric oxide synthase gene (eNOS-/-) have not been fully elucidated. As NO is a potent vasodilator agent and possibly promotes angiogenesis, we investigated whether vasoconstriction and/or microvascular rarefaction could exp...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200208000-00021
更新日期:2002-08-01 00:00:00
abstract:OBJECTIVES:To examine the health risks associated with smoking and blood pressure in Chinese hypertensive patients and to compare the benefit of antihypertensive drug treatment with the risk attributable to smoking. METHODS:We used multiple Cox regression to correlate outcome with blood pressure and smoking status in ...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章
doi:10.1097/00004872-200102000-00004
更新日期:2001-02-01 00:00:00
abstract:OBJECTIVE:Anemia is common in patients with heart failure and several factors have been thought to cause anemia in heart failure. Despite vigorous studies, the mechanism underlying the pathophysiology of anemia in heart failure is unknown. We investigated the iron regulating system in Dahl salt-sensitive heart failure ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3283434784
更新日期:2011-04-01 00:00:00
abstract:OBJECTIVE:To evaluate the effects of low doses of omega-3 polyunsaturated fatty acids on ambulatory blood pressure monitoring parameters in a group of mild essential hypertensives. PATIENTS:We studied 24 consecutive essential hypertensive patients from our outpatient clinic with mild hypertension (diastolic blood pres...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1995-12-01 00:00:00
abstract::The effect on blood pressure (BP) of acute and chronic suppression of angiotensin (ANG) II was studied in the two-kidney, one clip hypertensive rat. Conscious, chronically catheterized rats were given a bolus injection of captopril (2.5 mg/kg) followed by a chronic infusion of either dextrose or captopril (1 mg/kg per...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198512000-00006
更新日期:1985-12-01 00:00:00
abstract:BACKGROUND:We examined the relation between cardiovascular reactivity (the response of the cardiovascular system to psychological stress) and the severity and progression of carotid atherosclerosis. METHODS:Using duplex ultrasonography, we measured the change in the area of all detectable plaques in the extracranial c...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199715010-00004
更新日期:1997-01-01 00:00:00
abstract::Interstrain restriction fragment length polymorphism was detected after Southern blot hybridization of spontaneously hypertensive (SHR) and control (WKY) rat DNA digested by Bam HI restrictase with a v-fos probe. The SHR genome was characterized by an additional minor band of 4.0 kb. Other restriction fragment length ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1988-10-01 00:00:00