Abstract:
OBJECTIVE:It has been shown that nitric oxide (NO) plays an important role in the central control of arterial pressure and sympathetic nerve activity. The aim of this study was to determine whether NO can regulate sympathetic nerve activity by an action on pressor neurons within the rostral part of the ventrolateral medulla (VLM). DESIGN AND METHODS:Experiments were performed on anaesthetized rabbits with denervated arterial and cardiopulmonary baroreceptors. The mean arterial pressure (MAP), heart rate and renal sympathetic nerve activity were measured. Microinjections of the NO donors sodium nitroprusside (SNP, 4-50 nmol) and S-nitroso-glutathione (10 nmol), the NO precursor L-arginine (50 nmol) and the NO synthase inhibitor N omega-nitro-L-arginine methyl ester (L-NAME, 50 nmol), were made into the functionally identified pressor region in the rostral VLM. The effects of SNP were also determined before and after injection of 5 nmol methylene blue into the same area. In control experiments, injections of D-arginine (50 nmol) and D-NAME (50 nmol), which are the inactive isomers of L-arginine and L-NAME, respectively, were also made into the functionally identified pressor region in the rostral VLM. RESULTS:Microinjections of SNP into the rostral VLM pressor region produced a dose-dependent increase in mean arterial pressure and renal sympathetic nerve activity. At the highest dose of 50 nmol, the increase in MAP was 26 +/- 5 mmHg (P < 0.001) and the sympathetic nerve activity was 53 +/- 5% (P < 0.001). These effects were abolished following methylene blue injection into the same region. Injection of 10 nmol S-nitroso-glutathione also produced increases in MAP (15 +/- 2 mmHg, P < 0.001) and in renal sympathetic nerve activity (28 +/- 2%, P < 0.001). Microinjections of L- or D-arginine resulted in very small depressor responses, but had no significant effect on renal sympathetic nerve activity. Microinjections of L-NAME, but not of D-NAME, caused significant decreases in MAP (19 +/- 1 mmHg, P < 0.001) and in sympathetic nerve activity (30 +/- 3%, P < 0.001). CONCLUSIONS:The results indicate that, in the anaesthetized rabbit with denervated baroreceptors, NO has a pressor and sympathoexcitatory action in the rostral VLM, which is mediated by a cyclic GMP-dependent mechanism. Second, endogenous NO may modulate sympathetic activity tonically, by a direct or indirect action on sympathoexcitatory neurons within the rostral VLM.
journal_name
J Hypertensjournal_title
Journal of hypertensionauthors
Hirooka Y,Polson JW,Dampney RAdoi
10.1097/00004872-199611000-00010subject
Has Abstractpub_date
1996-11-01 00:00:00pages
1317-24issue
11eissn
0263-6352issn
1473-5598journal_volume
14pub_type
杂志文章abstract:OBJECTIVES:This controlled trial assessed the effect of continuous positive airway pressure (CPAP) on blood pressure (BP) in patients with obstructive sleep apnea (OSA) and resistant hypertension (RH). METHODS:We evaluated 96 patients with resistant hypertension, defined as clinic BP at least 140/90 mmHg despite treat...
journal_title:Journal of hypertension
pub_type: 杂志文章,随机对照试验
doi:10.1097/HJH.0b013e32833b9c63
更新日期:2010-10-01 00:00:00
abstract:OBJECTIVE:To characterize the in vivo vascular properties of the spontaneously hypertensive rat (SHR) renal vascular bed by examining vascular conductance/resistance responsiveness to vasoactive agents in vivo and determining whether the filtration surface area of glomerular capillaries is reduced. DESIGN AND METHODS:...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200108000-00020
更新日期:2001-08-01 00:00:00
abstract:OBJECTIVE:Few data are available comparing the effects of monotherapy and combination therapy on target organ damage. The PICXEL study compared the efficacy of a strategy based on first-line combination with perindopril/indapamide versus monotherapy with enalapril in reducing left ventricular hypertrophy (LVH) in hyper...
journal_title:Journal of hypertension
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/01.hjh.0000187253.35245.dc
更新日期:2005-11-01 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::Use of the aldosterone-to-renin ratio has controversially suggested that approximately 10% of hypertensives have primary aldosteronism, and most of these individuals are thought to have idiopathic hyperaldosteronism. The usual renin-angiotensin system control is intact in these individuals and is similar to that in lo...
journal_title:Journal of hypertension
pub_type: 杂志文章,评审
doi:10.1097/00004872-200201000-00003
更新日期:2002-01-01 00:00:00
abstract:OBJECTIVE:To determine the relationship between endothelin-1 (ET-1), human atrial natriuretic peptide (hANP), plasma-renin activity (PRA) and 24-h urinary excretion of aldosterone (U-Ald) in pregnancy-induced hypertension (PIH). DESIGN AND METHODS:Plasma hANP (pg/ml), ET-1 (pg/ml), PRA (ng/ml per h) and U-Ald (microg/...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章
doi:10.1097/00004872-199917090-00012
更新日期:1999-09-01 00:00:00
abstract:OBJECTIVE:Studies in genetically hypertensive rats and their normotensive Wistar-Kyoto control rats have revealed a linkage of a chromosomal region containing the angiotensin converting enzyme (ACE) gene with blood pressure. This led to the hypothesis that ACE is a possible candidate gene for primary hypertension in hu...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199304000-00003
更新日期:1993-04-01 00:00:00
abstract:BACKGROUND:Recently, an expert group advised to measure carotid-femoral (cf) pulse wave velocity (PWV) on the right side of the body, and to use a sliding caliper when tape measure distance cannot be obtained in a straight line. The present study investigates the evidence for this advice by comparing the real travelled...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e328360275d
更新日期:2013-05-01 00:00:00
abstract:OBJECTIVE:To investigate the association between long-term exposure to high-level urban traffic noise and blood pressure in preschool children. DESIGN:Normotensive children (n = 1542), aged 3-7 years and attending kindergartens, had their blood pressures and heart rate measured. Mean values of these circulatory variab...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1995-04-01 00:00:00
abstract::The mechanisms resulting in the greater predisposition of male subjects towards hypertension were investigated in different strains of rats with genetic hypertension [spontaneously hypertensive rats of the stroke-prone strain (SHRSP) and spontaneously hypertensive rats (SHR)] and their respective normotensive controls...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1989-09-01 00:00:00
abstract::Seventeen essential hypertensive patients with normal renal function were treated with a new non-sulphydryl orally active angiotensin converting enzyme (ACE) inhibitor, benazepril, 10 mg given once or twice daily, according to diastolic blood pressure levels, for 6 weeks. In all patients, changes in blood pressure, sy...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199011000-00003
更新日期:1990-11-01 00:00:00
abstract:OBJECTIVE:Hypertensive rats are more sensitive to the pressor effects of acute ouabain than normotensive rats. We analyzed the effect of chronic ouabain (approximately 8.0 microg/day, 5 weeks) treatment on the blood pressure of spontaneously hypertensive rats (SHRs) and Wistar-Kyoto rats and the contribution of vascula...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e32832a391f
更新日期:2009-06-01 00:00:00
abstract:OBJECTIVE:Reduction in capillary density or rarefaction is a hallmark of essential hypertension. We measured the retinal capillary density using noninvasive optical coherence tomographic angiography (OCT-A) in adults with treated systemic hypertension and determined possible correlations with ambulatory blood pressure ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001916
更新日期:2019-03-01 00:00:00
abstract:OBJECTIVE:Studies were undertaken to clarify the pathophysiologic significance of endogenous endothelin in the control of blood pressure and renal hemodynamics in spontaneously hypertensive rats (SHR). DESIGN:The technique of passive immunization was used to neutralize endogenous endothelin in order to estimate the co...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1992-08-01 00:00:00
abstract:OBJECTIVE:The aim of the study was to examine the associations of birth outcomes and longitudinally measured fetal and infant growth patterns with retinal vessel calibers in childhood. METHODS:In a population-based prospective cohort study among 4122 children, we measured growth characteristics in second and third tri...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000561
更新日期:2015-07-01 00:00:00
abstract:OBJECTIVE:To examine the associations among hypertension, insulin secretion, glucose tolerance and insulin resistance in vivo. DESIGN:Glucose tolerance and insulin secretion during an intravenous glucose tolerance test and action of insulin on whole-body glucose kinetics in the post-absorptive state and during hyperin...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199816030-00014
更新日期:1998-03-01 00:00:00
abstract:OBJECTIVE:To assess the Accutracker II (version 30/23) ambulatory blood pressure monitor by nationally agreed protocols in order to resolve previous conflicting assessments, and to examine the feasibility of combining these protocols into one study. DESIGN:The protocols of the Association for the Advancement of Medica...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1993-11-01 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:OBJECTIVE:To determine whether a diuretic can also reverse the clinical, systemic, renal and glomerular haemodynamic and pathological changes caused by nephrosclerosis. METHODS:Three groups of 20-week-old spontaneously hypertensive rats (SHR) were investigated: control male SHR; a similar group, administered 50 mg/l N...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199607000-00004
更新日期:1996-07-01 00:00:00
abstract:OBJECTIVES:Treatment modifications--addition, uptitration, switching, and downtitration--are necessary to address issues such as unattained blood pressure goals, adverse drug events, drug cost, or patient dissatisfaction which lead to treatment discontinuation. This study assessed the patterns of treatment modification...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000806
更新日期:2016-03-01 00:00:00
abstract:OBJECTIVES:To investigate the effects of the interaction between adenosine receptors and renal nerves on urinary sodium excretion and glomerular filtration rate. METHODS AND DESIGN:The effects on water and sodium excretion and glomerular filtration rate of A1 [2-chloro-N6-cyclopentyl-adenosine (CCPA)] and A2 [2-hesiny...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199715120-00090
更新日期:1997-12-01 00:00:00
abstract:OBJECTIVES:Patients with chronic renal failure are restricted to mild physical activity and tend to a lack of exercise. However, there have been few reports regarding the influence of chronic exercise on the progression of renal disease. Similarly, there are few animal models concerned with the effect of exercise train...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200110000-00024
更新日期:2001-10-01 00:00:00
abstract:OBJECTIVES:Patients with end-stage renal-disease under hemodialysis have increased cardiovascular risk and experience severe blood pressure (BP) fluctuations during the dialysis session and the subsequent interdialytic period. BP variability (BPV) may be an additional risk factor for cardiovascular events and prelimina...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001478
更新日期:2017-12-01 00:00:00
abstract:BACKGROUND:Cross-sectional studies of the association between hypertension (HTN) and brain atrophy have shown reductions in prefrontal, temporal, and hippocampal volumes, and have identified thinner cortices across the cortical mantle. METHOD:In the current study, we followed 96 participants enrolled in the Baltimore ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000531
更新日期:2015-06-01 00:00:00
abstract::Fenoldopam, a dopamine-1 (D1) agonist, was administered by a 6-h intravenous infusion to patients with refractory hypertension [diastolic blood pressure (DBP) greater than 115 mmHg while on triple therapy] in order to achieve a fall in DBP of 30 mmHg. The evolution of blood pressure, heart rate, glomerular filtration ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198808000-00010
更新日期:1988-08-01 00:00:00
abstract:AIMS:Monocyte/macrophages participate in inflammatory responses that may play an important role in mineralocorticoid-induced vascular damage. We hypothesized that monocyte/macrophages modulate aldosterone effects on oxidative stress, endothelial function, and ultimately vascular stiffness. METHODS:Adult heterozygous o...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e328330a963
更新日期:2009-11-01 00:00:00
abstract:OBJECTIVE:Recent studies implied that angiotension receptor blockers (ARBs) not only have an antihypertensive effect but also have beneficial effects on dementia. The purpose of this study was to investigate the effects of ARBs on dementia and the subtypes. METHODS:We conducted a population-based cohort study with dat...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000086
更新日期:2014-04-01 00:00:00
abstract:OBJECTIVE:We examined the effects of treatment with soluble epoxide hydrolase inhibitor (sEHi) and epoxyeicosatrienoic acids (EETs) analogue (EET-A), given alone or combined, on blood pressure (BP) and ischemia/reperfusion myocardial injury in rats with angiotensin II (ANG II)-dependent hypertension. METHODS:Ren-2 tra...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001708
更新日期:2018-06-01 00:00:00
abstract:BACKGROUND:Secondary prevention of stroke with antihypertensive drugs is now standard practice, but it is unclear how soon after a cerebrovascular event antihypertensive therapy should be initiated or re-started. Due to impaired cerebral autoregulation, changes in systemic blood pressure may be reflected in cerebral pe...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00004872-200405000-00022
更新日期:2004-05-01 00:00:00
abstract:OBJECTIVE:The value of SBP during exercise and recovery period as a risk marker for sudden cardiac death (SCD) is not known. Thus, we assessed the association of SBP during recovery from exercise testing with the risk of SCD. METHODS:SBP was measured every 2 min during and at 2 min after a progressive cycle ergometer ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000066
更新日期:2014-03-01 00:00:00