Abstract:
:Isolated tail arteries from stroke-prone spontaneously hypertensive rats (SHRSP), but not from normotensive Wistar-Kyoto rats (WKY), exhibit oscillatory contractions in response to norepinephrine. Previous studies indicate that the mechanism for these oscillations involves altered membrane calcium and/or potassium handling, and that this vascular change is a genetic defect associated with hypertension in SHRSP. The purpose of this experiment was to determine whether treatment of SHRSP with the calcium entry blocker felodipine would alter oscillatory activity. Adult SHRSP and WKY rats were treated orally with felodipine for 8 weeks. Felodipine treatment produced a significant decrease in blood pressure in SHRSP (control SHRSP: 240 +/- 7 mmHg, n = 6; felodipine-treated SHRSP: 164 +/- 8 mmHg, n = 5, P less than 0.05; tail-cuff method). Helically-cut tail artery strips from all rats were mounted in tissue baths for isometric force recording and exposed to norepinephrine (6 x 10(-9) to 6 x 10(-6) mol/l) for 20 min at each concentration. Oscillatory activity was defined as the sum of the magnitudes of all phasic contractions occurring during the final 10 min of norepinephrine incubation. Oscillatory activity was markedly reduced in tail arteries from felodipine-treated SHRSP when compared with control SHRSP. Felodipine also inhibited oscillatory activity when added directly to the tissue bath. It seems, therefore, that felodipine may lower blood pressure in SHRSP, at least in part, by correcting the genetic defect responsible for oscillatory activity.
journal_name
J Hypertensjournal_title
Journal of hypertensionauthors
Bruner CA,Webb RCdoi
10.1097/00004872-198901000-00005subject
Has Abstractpub_date
1989-01-01 00:00:00pages
31-5issue
1eissn
0263-6352issn
1473-5598journal_volume
7pub_type
杂志文章abstract:OBJECTIVE:To study the effect of oral magnesium supplementation on blood pressure, platelet aggregation and platelet calcium handling in deoxycorticosterone acetate (DOCA)-induced hypertension in rats. DESIGN AND METHODS:Rats were divided into four groups of 20 each. Drug treatments were given for a 6-week period. Con...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200018070-00014
更新日期:2000-07-01 00:00:00
abstract:OBJECTIVES:To examine: (1) in how many treated hypertensive patients it was possible to discontinue drug treatment; (2) the time-course for redevelopment of hypertension after discontinuation of therapy; and (3) whether drug withdrawal was associated with an increase in left ventricular mass (LVM). DESIGN:Fifty-four m...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199206000-00012
更新日期:1992-06-01 00:00:00
abstract:OBJECTIVE:To examine in a population with a high prevalence of hypertension, the association between six cardiovascular polymorphisms, arterial stiffness and medication use. METHODS:In this cross-sectional study (Hypertension: Interaction and Prevalence of POlymorphisms related to Cardiovascular Risk and the Associati...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/hjh.0b013e328317f215
更新日期:2009-01-01 00:00:00
abstract:OBJECTIVE:Patients with essential hypertension exhibit several red blood cell (RBC) ion transport abnormalities, insulin resistance (IR) and increased risk of developing type 2 diabetes. The aims of this study were to assess RBC ion transport activities under basal conditions and to test the in vivo effect of acute hyp...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200307000-00021
更新日期:2003-07-01 00:00:00
abstract:OBJECTIVE:We investigated to what extent anthropometric and lifestyle factors contributed to the classification of Chinese individuals into groups with white-coat, masked and sustained hypertension (HT). METHODS:We measured the office and ambulatory blood pressure (BP) in 694 Chinese enrolled in the JingNing populatio...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282efeee7
更新日期:2007-12-01 00:00:00
abstract:OBJECTIVE:This study evaluated the impact of prolonged circulatory unloading and subsequent left ventricular (LV) mass decrease on LV myocardial performance. Five-week head-down tilt (-6°) bed rest (HDTBR) was used as a model of prolonged circulatory unloading. METHODS:Ten young healthy male volunteers (age 23 ± 2 yea...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e32833f5e01
更新日期:2011-01-01 00:00:00
abstract::Over the last few years, much progress has been made in understanding the genetic basis of primary aldosteronism. This has led to the diagnosis of the familial forms and has aided the understanding of the basis of sporadic forms of the disease. Such information can be exploited to improve the therapeutic approaches us...
journal_title:Journal of hypertension
pub_type: 杂志文章,评审
doi:10.1097/00004872-200404000-00001
更新日期:2004-04-01 00:00:00
abstract:CLINICAL STUDIES:In clinical renal transplantation studies, recipients of a renal graft from a donor with a genetic predisposition to hypertension had higher blood pressures and required more antihypertensive treatment than recipients of a renal graft from a normotensive donor. In addition, blood pressure normalization...
journal_title:Journal of hypertension
pub_type: 社论
doi:10.1097/00004872-199309000-00001
更新日期:1993-09-01 00:00:00
abstract::Noradrenergic activity was measured in the brainstem, hypothalamus and thoracic spinal cord of male and female spontaneously hypertensive (SHR) and Wistar-Kyoto (WKY) rats at 6 and 28-36 weeks of age. Two techniques were used, measurement of a major noradrenaline (NA) metabolite, free 3,4-dihydroxyphenylethyleneglycol...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198506000-00007
更新日期:1985-06-01 00:00:00
abstract::The function of the renin-angiotensin system (RAS) is influenced by changes in sodium balance and angiotensin II (ANG II) levels. In previous studies it has been difficult to assess the physiological effects on blood pressure homeostasis of different rates of ANG II infusion and of different levels of sodium in the di...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1985-10-01 00:00:00
abstract:OBJECTIVE:The heptapeptide angiotensin-(1-7) [Ang-(1-7)] has been identified as a versatile, endogenous inhibitor of the renin-angiotensin system (RAS). As the therapeutic response to exogenous RAS inhibitors, such as AT1 receptor antagonists, is altered by changes in salt intake, we investigated the effect of a low, n...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200412000-00018
更新日期:2004-12-01 00:00:00
abstract:OBJECTIVE:To investigate the relationship between admission SBP and subsequent cardiovascular and all-cause mortality in older patients hospitalized for acute coronary syndrome (ACS). METHODS:This is a retrospective observational study. Data from the CBD Bank (Cardiovascular Center Beijing Friendship Hospital Database...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002737
更新日期:2020-11-16 00:00:00
abstract:OBJECTIVE:To evaluate the incidence of hypertension and the rate of decline in renal function in a sample of 47 Olivetti Heart Study (OHS) participants whose blood pressure (BP) salt-sensitivity and renal tubular sodium handling had been assessed in 1987-88. METHODS:During the 2002-04 OHS follow-up examination, medica...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3281139ebd
更新日期:2007-07-01 00:00:00
abstract:OBJECTIVES:Acute hypertensive response (AHR) in acute stroke is associated with adverse outcomes; however, the underlying pathophysiology of the association is poorly understood and its prognostic impact in ischemic stroke remains unclear. We aimed to investigate the prognostic significance of AHR in patients with isch...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002171
更新日期:2019-12-01 00:00:00
abstract:BACKGROUND:Dipeptidyl peptidase-4 (DPP4) is a key protein in glucose homeostasis and a pharmacological target in type 2 diabetes mellitus. This study explored whether the novel adipokine soluble DPP4 (sDPP4) can cause endothelial dysfunction, an early marker of impaired vascular reactivity. METHOD:Reactivity was studi...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000886
更新日期:2016-05-01 00:00:00
abstract:OBJECTIVE:To estimate the sensitivity and specificity of self-reported hypertension (HTN) as compared with the clinical diagnosis in epidemiological studies. METHODS:We searched MEDLINE, Embase, Scopus, Web of Science, LILACS, Google Scholar, and ProQuest Dissertations & Theses Global: Health & Medicine databases. In ...
journal_title:Journal of hypertension
pub_type: 杂志文章,meta分析
doi:10.1097/HJH.0000000000001648
更新日期:2018-05-01 00:00:00
abstract:OBJECTIVES:To compare noninvasive methods to assess pulse wave velocity (PWV) with the invasive gold standard in terms of absolute values, age-related changes, and relationship with subclinical organ damage. METHODS:Invasive aortic PWV (aoPWVinv) was measured in 915 patients undergoing cardiac catheterization (mean ag...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000518
更新日期:2015-05-01 00:00:00
abstract:OBJECTIVE:The renin-angiotensin system plays an important role in blood pressure control. Recently the mouse Ren-2 renin gene was introduced into the genome of rats, producing low-renin hypertensive animals. The aim of the present study was to characterize the pharmacological and morphological properties of mesenteric ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199210000-00012
更新日期:1992-10-01 00:00:00
abstract::Graft-prosthesis and stentgraft placements are effective modalities for treating abdominal aortic aneurysm, but related changes in arterial stiffness are not well established. The present study sought to assess aortic stiffness after aneurism repair by measuring pulse wave velocity (PWV). The graft-related variation o...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3283299b22
更新日期:2009-06-01 00:00:00
abstract:OBJECTIVE:In order to optimize cardiovascular risk assessment, we compared the association of common carotid artery intima-media thickness (CCA-IMT) with carotid and/or iliofemoral (C/IF) plaques according to the presence or absence of cardiovascular disease (CVD) and belonging to a high cardiovascular risk group. DES...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000052494.18130.80
更新日期:2003-04-01 00:00:00
abstract:BACKGROUND:In the nineteenth century, prior to the introduction of the cuff sphygmomanometer, stiffening of arteries was recognized as an indicator of vascular ageing and cardiovascular risk. Through the twentieth century, views on vascular ageing came to focus on brachial blood pressures and on occlusive atherosclerot...
journal_title:Journal of hypertension
pub_type: 杂志文章,评审
doi:10.1097/HJH.0b013e32835ed5b9
更新日期:2013-05-01 00:00:00
abstract:OBJECTIVES:The role of the baroreflex function in the pathogenesis of hemodialysis-associated hypotension is controversial. Complex demodulation technique (CDM), providing continuous assessment of the amplitude of cardiovascular oscillation over time, is particularly suitable to assess dynamic changes in autonomic nerv...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e328332b7af
更新日期:2010-02-01 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::Plasma viscosity and fibrinogen concentrations were measured in 70 diabetics (35 hypertensive and 35 normotensive) and compared with those of 35 age- and sex-matched normotensive healthy subjects in relation to body weight. The body weight, body mass index, blood pressure (systolic and diastolic), mean arterial pressu...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199008000-00004
更新日期:1990-08-01 00:00:00
abstract:AIMS:Selenium is an antioxidant micronutrient with potential associations with hypertension. Few studies have investigated the association of serum selenium concentrations with blood pressure and hypertension in countries with low dietary selenium intake such as Germany, with inconsistent findings. METHODS:We undertoo...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e32835414df
更新日期:2012-07-01 00:00:00
abstract::Elevated large artery stiffness and pulse pressure have emerged as important risk factors for cardiovascular disease. The genders differ in large artery biomechanical properties throughout the lifespan with females displaying higher stiffness than males during the prepubertal years and a dramatic increase after menopa...
journal_title:Journal of hypertension
pub_type: 杂志文章,评审
doi:10.1097/HJH.0b013e328344da5e
更新日期:2011-06-01 00:00:00
abstract:OBJECTIVE:To determine if the contribution of the sympathetic nervous system to blood pressure could be evidenced by low-frequency oscillations of systolic blood pressure (LF(SBP)), reflecting vascular sympathetic modulation, or by the decrease in blood pressure after autonomic blockade. DESIGN:We studied multiple sys...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章
doi:10.1097/00004872-200309000-00017
更新日期:2003-09-01 00:00:00
abstract:BACKGROUND:Left ventricular mass is associated with body size, obesity and blood pressure. Echocardiography is routinely used to estimate this parameter, which is usually indexed to body surface area to allow comparisons to be made between individuals and groups of different body size. However, in obese subjects, using...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199917040-00016
更新日期:1999-04-01 00:00:00
abstract::We have studied the norepinephrine (NE) uptake processes directly in synaptosomes isolated from the hypothalamus of both Dahl salt-sensitive (DS) and Dahl salt-resistant (DR) rats. Both DS and DR rats were divided into two dietary groups, one high salt diet group and one low salt diet group. NE uptake was highly sodiu...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198410000-00003
更新日期:1984-10-01 00:00:00
abstract::Normotensives with hypertensive parents have been reported to exhibit enhanced cardiovascular reactions to mental stress. We have examined the question of why this result was not confirmed in all studies. In addition we have investigated whether appropriate tests can be performed under clinical rather than laboratory ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198502000-00006
更新日期:1985-02-01 00:00:00