Abstract:
OBJECTIVE:The purposes of this study were: (1) to test whether intravenous infusion of norepinephrine can affect plasma dopamine levels; and (2) to explore to what extent dopamine-2 or alpha 2-receptors play a role in this response. DESIGN:Norepinephrine infusion in man was performed to test whether the increase in norepinephrine during sympathetic stimulation can affect dopamine release. Specific antagonists of presynaptic dopamine-2 and alpha 2-receptors were administered to test the receptor(s) involved in this possible regulatory phenomenon. METHODS:Plasma catecholamine levels were investigated in seven normal subjects before and after administration of domperidone (dopamine-2 antagonist), yohimbine (alpha 2-antagonist) and norepinephrine. RESULTS:Both oral domperidone and yohimbine induced a significant increase in both plasma norepinephrine and plasma dopamine. Norepinephrine infusion induced a significant decrease in plasma dopamine. Pretreatment with domperidone only partially counteracted this inhibitory effect of norepinephrine infusion, whereas yohimbine fully counteracted it. CONCLUSIONS:Our data show that norepinephrine may act as a hormone at plasma concentrations as low as 450 pg/ml. The norepinephrine-induced plasma dopamine decrease seems to be alpha 2-adrenoceptor-mediated. This norepinephrine effect may be involved in the physiologic decrease in plasma dopamine that we demonstrated in the upright position in normal subjects.
journal_name
J Hypertensjournal_title
Journal of hypertensionauthors
Musso NR,Gianrossi R,Vergassola C,Pende A,Ioverno A,Galbariggi G,Lotti Gsubject
Has Abstractpub_date
1992-09-01 00:00:00pages
1017-23issue
9eissn
0263-6352issn
1473-5598journal_volume
10pub_type
杂志文章abstract:OBJECTIVE:To assess the clinical relevance of regression to the mean for clinical trials and clinical practice. METHODS:MEDLINE was searched until February 2018 for randomized trials of BP lowering with over 1000 patient-years follow-up per group. We estimated baseline mean BP, follow-up mean (usual) BP amongst patien...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001994
更新日期:2019-01-01 00:00:00
abstract:BACKGROUND:Hydroxymethylglutaryl coenzyme A (HMGCoA) reductase inhibitors have beneficial effects beyond their cholesterol-lowering properties. The antioxidant mechanism of HMGCoA reductase inhibitors is not completely understood. OBJECTIVES:To elucidate the antioxidant effect of simvastatin. METHODS:We studied the i...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200203000-00018
更新日期:2002-03-01 00:00:00
abstract:OBJECTIVE:A number of potential interactions between angiotensin-converting enzyme inhibitors and lithium have been described in the literature. In the present study, we investigated the effects of a low-dose combination treatment with lithium and captopril on survival and stroke prevention in salt-loaded, stroke-prone...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000189868.48290.d8
更新日期:2005-12-01 00:00:00
abstract::Microvascular alterations associated with reversal of hypertension by exposure to simulated high altitude were investigated in the gracilis muscle of the spontaneously hypertensive rat (SHR). Male, 4-week-old SHR were either placed in a hypobaric chamber (SHR-HA) at 430 mmHg or maintained at ambient barometric pressur...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198612000-00008
更新日期:1986-12-01 00:00:00
abstract::Behavioral stress and high dietary salt have been reported to increase blood pressure additively in non-human primates. This study was designed to replicate this phenomenon and to assess neuroendocrine correlates and responses to two commonly used antihypertensives, a beta-adrenoceptor blocker and a thiazide diuretic....
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1991-10-01 00:00:00
abstract:OBJECTIVES:In this cross-sectional study we compared the central aortic systolic pressure (CASP), peripheral brachial systolic pressure (PSP), peripheral brachial diastolic pressure (PDP) and augmentation index (AIx) between normotensive offspring of nonhypertensive parents (ONT) and normotensive offspring with at leas...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e328355207b
更新日期:2012-08-01 00:00:00
abstract:OBJECTIVE:To evaluate the association of angiotensinogen (AGT) gene with AGT level and hypertension based on the overall genetic variation of the AGT gene in among African-Americans. METHODS:All non-rare single nucleotide polymorphisms (SNPs) in AGT were identified by resequencing 24 individuals. Five tagging SNPs wer...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200310000-00011
更新日期:2003-10-01 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:OBJECTIVE:This study was designed to evaluate the capacity of norepinephrine (NE) to induce hypertrophic remodeling of small arteries in rats, and to determine the involvement of endothelin (ET) to initiate and maintain it. DESIGN AND RESULTS:Treatment with NE (2.5 microg/kg per min) for 14 or 28 days produced a simil...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200110000-00014
更新日期:2001-10-01 00:00:00
abstract:BACKGROUND:In familial hyperaldosteronism type I (FH-I), glucocorticoid treatment suppresses adrenocorticotrophic hormone-regulated hybrid gene expression and corrects hyperaldosteronism. OBJECTIVE:To determine whether the wild-type aldosterone synthase genes, thereby released from chronic suppression, are capable of ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199715120-00080
更新日期:1997-12-01 00:00:00
abstract::Twenty-four adolescent boys with a positive and 40 boys with a negative parental history of hypertension (PH+ and PH-, respectively) were studied at rest and during exercise on a bicycle ergometer at work loads ranging from 25 to 150 W. Each group was divided into fit and unfit categories on the basis of oxygen consum...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1988-05-01 00:00:00
abstract:OBJECTIVES:We hypothesized that the aldosterone: renin ratio (ARR) predicts the antihypertensive response to mineralocorticoid receptor antagonist, spironolactone (SPIRO), when compared with bendroflumethiazide (BFZ). METHODS:We conducted a randomized, crossover, trial on hypertensive patients with either high ARR (HA...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/HJH.0b013e328332b79b
更新日期:2010-01-01 00:00:00
abstract:OBJECTIVE:We investigated the contribution of reduced nicotinamide-adenine dinucleotide phosphate (NADPH) oxidase-dependent reactive oxygen species (ROS) generation to the pathogenesis of diastolic heart failure (DHF) in Dahl salt-sensitive (DS) hypertensive rats, with the aim of testing our hypothesis that the cardiop...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000226200.73065.5d
更新日期:2006-06-01 00:00:00
abstract:OBJECTIVE:We hypothesized that downregulation of the antioxidant thioredoxin system contributes to oxidative stress in angiotensin II-induced hypertension. As oestrogen may protect against oxidative stress, we also evaluated whether the thioredoxin system, particularly in the heart, is differentially regulated between ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3280acac60
更新日期:2007-06-01 00:00:00
abstract:AIM:To examine the effect of renal denervation (RDN) on blood pressure (BP) and health-related quality of life (QoL) in patients with resistant hypertension, pseudoresistant hypertension due to a white-coat effect and in patients with uncontrolled masked hypertension. METHODS:Using the Medical Outcomes Study 36-Item S...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000698
更新日期:2015-11-01 00:00:00
abstract:OBJECTIVE:Experimental data show that ouabain is a modulator of the sodium-potassium pump, which plays an important role in sodium homeostasis and blood pressure regulation. We investigated the distribution of plasma ouabain in the general population in relation to blood pressure and other determinants of sodium homeos...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200308000-00010
更新日期:2003-08-01 00:00:00
abstract:OBJECTIVE:To examine the regulation by angiotensin II and by steroids of the expression of the angiotensin II AT1a and AT1b receptor genes in rat hearts. METHODS:Endogenous levels of angiotensin II in the rats were increased either by unilateral 0.2-mm renal artery clips or by subcutaneous infusions of frusemide (12 m...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1995-07-01 00:00:00
abstract:OBJECTIVE:To investigate the effects of hypertension and diabetes mellitus on vascular albumin permeability and hypertrophy in 11-week-old Wistar-Kyoto (WKY) rats and spontaneously hypertensive rats (SHR) with and without 3 weeks of streptozotocin-induced diabetes. METHODS:Vascular albumin permeability was measured as...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199505000-00008
更新日期:1995-05-01 00:00:00
abstract::This study focuses on the relationship between some aspects of intra-erythrocytic sodium metabolism (intra-erythrocytic Na content, Na,Li-countertransport), blood pressure, and family history of hypertension, in a group of 84 randomly selected school children (45 males, 39 females). Na,Li-countertransport was signific...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198803000-00007
更新日期:1988-03-01 00:00:00
abstract:BACKGROUND:Left ventricular (LV) hypertrophy, arterial hypertension and end-stage renal disease (ESRD) are associated with deranged cardiac parasympathetic regulation and increased cardiovascular risk. These conditions often co-exist but little is known about the relative contribution of LV mass, arterial blood pressur...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200308000-00020
更新日期:2003-08-01 00:00:00
abstract:OBJECTIVES:To assess the influence of sodium intake on the two components of arterial blood pressure [mean blood pressure (MBP) and pulse pressure] and left ventricular mass (LVM) in normotensive subjects and never-treated hypertensive patients. METHODS:Blood pressure, LVM (M-mode echocardiography) and sodium excretio...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200404000-00011
更新日期:2004-04-01 00:00:00
abstract:BACKGROUND:Self-measurement of blood pressure (BP) is increasingly being used for the diagnosis of hypertension and to monitor BP at home. Whenever compared with ambulatory BP measurements, home BP values are frequently higher and less predictive for incident cardiovascular events. We hypothesized that this could be ca...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001775
更新日期:2018-09-01 00:00:00
abstract::The effects on serum ionized calcium (ICa) and pH of different storage conditions of blood or serum, and of physiological influences such as over-ventilation, food intake and dietary sodium intake have been investigated. Temperature and time-related changes in ICa occurred with storage and were minimized by immediate ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1987-08-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Hyperactivity of the brain renin-angiotensin (Ang) system has been implicated in the development and maintenance of hypertension. AngIII, one of the main effector peptides of the brain renin-Ang system, exerts a tonic stimulatory control over blood pressure (BP) in hypertensive rats. Aminopepti...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001563
更新日期:2018-03-01 00:00:00
abstract:BACKGROUND:The oral contraceptive pill (OCP) is widely prescribed throughout the world. Although it is associated with a small but significant increase in blood pressure, the influence of the OCP on large artery stiffness and wave reflection is unclear. The aim of this study was to determine the relationship between us...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e328346a5af
更新日期:2011-06-01 00:00:00
abstract:OBJECTIVE:The aim of the study was to investigate the haemodynamic effects of hormonal changes during the menstrual cycle in 11 hypertensive women aged between 29 and 38 years. DESIGN:In randomized order, the subjects were examined on days 2-7 (follicular phase) and on days 20-24 (luteal phase). All medication was wit...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1992-08-01 00:00:00
abstract:OBJECTIVE:Pre-eclampsia is characterized by an increased vascular tone which might be related to an abnormal endothelial cell function. As representatives of the fetal circulation, we compared the nitric oxide (NO)-releasing capacity of human umbilical vessels from normal and pre-eclamptic pregnancies. METHODS:Normal ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1994-11-01 00:00:00
abstract:OBJECTIVE:To evaluate the mean levels of blood pressure and hypertension (> or = 140 mmHg systolic or > or = 90 mmHg diastolic pressure or on treatment for hypertension) in the adult English population, and to evaluate any changes in the efficacy of hypertension management between 1994 and 2003. DESIGN/METHODS:Cross-s...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000226210.95936.bc
更新日期:2006-06-01 00:00:00
abstract:OBJECTIVE:Blood pressure (BP) load, defined as the percentage of abnormally elevated BP readings, is usually provided on the report of ambulatory BP monitoring. However, the usefulness of BP load is still uncertain. In the present study, we examined whether BP load would be associated, independently of BP level, with t...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3283624f9b
更新日期:2013-09-01 00:00:00
abstract:OBJECTIVES:To determine whether insulin sensitivity is impaired in normotensive offspring of essential hypertensives and to investigate how it relates to disturbed calcium metabolism. DESIGN:In 10 young lean, normotensive subjects with family histories of essential hypertension and in 10 age-matched controls we invest...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199304000-00013
更新日期:1993-04-01 00:00:00