Abstract:
OBJECTIVE:To test the hypothesis that apelin protects against angiotensin II (Ang II)-induced cardiovascular fibrosis and vascular remodeling. METHODS AND RESULTS:Wild-type mice administered apelin or apelin along with Ang II exhibited less cardiovascular fibrosis and decreased plasminogen activator inhibitor type-1 (PAI-1) gene expression than mice receiving Ang II, N-nitro-L-arginine methyl ester (L-NAME), apelin plus L-NAME or apelin plus Ang II plus L-NAME. In-vitro analysis using a luciferase construct driven by 3.1 kb of the human PAI-1 promoter revealed that apelin blocked Ang II-mediated PAI-1 gene expression. Immunoblotting for phosphorylated myosin phosphatase subunit and myosin light chain revealed that apelin blocked Ang II activation of the Rho kinase pathway, which is associated with induction of PAI-1 gene expression by Ang II. In addition, treatment of human aortic smooth muscle cells with apelin reduced PAI-1 mRNA and protein production in the presence and absence of Ang II. Conversely, L-NAME treatment attenuated the downregulation of PAI-1 by apelin in cells. CONCLUSION:Apelin protects against cardiac fibrosis and vascular remodeling through direct regulation of PAI-1 gene expression. This protective effect is mediated through the synergistic inhibition of Ang II signaling and increased production of nitric oxide by apelin. Our data extend previous findings and provide new insight into the molecular mechanisms by which apelin elicits a cardioprotective effect.
journal_name
J Hypertensjournal_title
Journal of hypertensionauthors
Siddiquee K,Hampton J,Khan S,Zadory D,Gleaves L,Vaughan DE,Smith LHdoi
10.1097/HJH.0b013e32834347desubject
Has Abstractpub_date
2011-04-01 00:00:00pages
724-31issue
4eissn
0263-6352issn
1473-5598journal_volume
29pub_type
杂志文章abstract::This study determined the influence of baroreflex sensitivity (BRS) on the rate of urinary sodium excretion and plasma renin activity (PRA) in response to a saline infusion in conscious male rabbits specifically bred for high (Group I; n = 7) and low (Group II; n = 10) BRS and in seven control animals. Only Group II s...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199109000-00005
更新日期:1991-09-01 00:00:00
abstract:OBJECTIVES:To assess whether the association between birth weight and blood pressure (BP) increases with age using three different statistical methods. METHODS:A representative sample of 1232 study participants born between 1974-1978 in Limache, Chile were assessed in 2000-2002, of whom 796 were reassessed in 2010-201...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000912
更新日期:2016-06-01 00:00:00
abstract:OBJECTIVES:Advanced diabetic nephropathy (DN) is characterized by a marked development of cardiovascular and renal disease. These patients are frequently managed by different health professionals with the consequence that the quality of care may differ substantially. To compare the management of cardiovascular risk fac...
journal_title:Journal of hypertension
pub_type: 杂志文章,多中心研究
doi:10.1097/01.hjh.0000239303.93872.31
更新日期:2006-08-01 00:00:00
abstract:BACKGROUND:Obstructive sleep apnea (OSA) has several negative effects on the heart including increase in myocardial end-systolic stress, venous return and sympathetic activity, all potential stimuli of left ventricular (LV) hypertrophy. The impact of the severity of OSA on LV geometry is unknown. We hypothesized that O...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/hjh.0b013e328336c90a
更新日期:2010-05-01 00:00:00
abstract:OBJECTIVES:Strong evidence has secured aging as a powerful predictor of both cardiovascular risk and endothelial dysfunction, yet specific treatment is not available. We tested the hypothesis that vascular responsiveness to flavanol-rich cocoa increases with advancing age. We have previously shown that flavanol-rich co...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000239293.40507.2a
更新日期:2006-08-01 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:OBJECTIVE:This study was designed to compare the effects of prostaglandin synthesis inhibition on calculated preglomerular and postglomerular resistance in hypertensive patients with unilateral renal artery stenosis (RAS) and in patients with essential hypertension. DESIGN AND METHODS:Sixteen patients with suspected r...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章
doi:10.1097/00004872-199606000-00013
更新日期:1996-06-01 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:BACKGROUND:Epidemiological investigations have demonstrated a close association between heavy alcohol consumption and hypertension. The mechanisms of this association, however, remain elusive. We studied the effects of alcohol withdrawal on blood pressure, hormonal parameters, and circulating markers of endothelial act...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000239283.35562.15
更新日期:2006-08-01 00:00:00
abstract::We have previously reported that pressor doses of angiotensin II induce atrial natriuretic factor (ANF) release. Since the number of glomerular and vascular ANF receptors may vary inversely with plasma ANF levels, we investigated whether they are modified by angiotensin II. Male rats were infused intraperitoneally for...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1991-12-01 00:00:00
abstract::Haemorheological characteristics were measured in a group of 52 patients with essential arterial hypertension (HT), and were compared with those of a group of normotensive subjects. The relationships between the arterial blood pressure (BP), the echocardiographic indices of left ventricular hypertrophy (LVH), and the ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1988-04-01 00:00:00
abstract:OBJECTIVE:It is not well known which exercise intensity is needed to obtain blood pressure reductions in response to endurance training. We therefore compared the effect of training at lower and higher intensity on blood pressure, and, in addition on other cardiovascular risk factors, in at least 55-year-old sedentary ...
journal_title:Journal of hypertension
pub_type: 杂志文章,随机对照试验
doi:10.1097/HJH.0b013e328322cf60
更新日期:2009-04-01 00:00:00
abstract:OBJECTIVE:To assess the effects of acute exposure to simulated high altitude on baroreflex control of mean cerebral blood flow velocity (MCFV). PATIENTS AND METHODS:We compared beat-to-beat changes in RR interval, arterial blood pressure, mean MCFV (by transcranial Doppler velocimetry in the middle cerebral artery), e...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e32826f49a3
更新日期:2007-09-01 00:00:00
abstract:OBJECTIVE:We aimed to investigate whether adjustment for frailty influences the relationship of blood pressure with mortality in elderly patients with type 2 diabetes mellitus (T2DM). METHODS:Patients aged 60 years and older (n = 858) were selected from a prospective observational cohort study of primary care patients...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000555
更新日期:2015-06-01 00:00:00
abstract::6-Hydroxydopamine (6-OHDA) was injected on alternate days from birth to 3 weeks of age into spontaneously hypertensive (SHR) and normotensive Wistar-Kyoto (WKY) control rats. The effects of this neonatal treatment on cardiovascular structure and mesenteric resistance vessel calcium sensitivity was studied in young (6 ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198608000-00010
更新日期:1986-08-01 00:00:00
abstract:OBJECTIVES:Retinal blood vessels may develop vasculopathy and apoptosis in response to hypertension. The present study was aimed at testing the role of losartan, a specific antagonist of angiotensin II receptor type 1 receptor in regulation of vascular apoptosis in retinal vasculature with hypertension. METHODS:Losart...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e328333663f
更新日期:2010-03-01 00:00:00
abstract:BACKGROUND:The difference between clinic and ambulatory blood pressure (BP) is a poor estimate of the true white-coat effect (WCE) measured with beat-to-beat recording. METHOD:We investigated whether the difference between clinic and home BP (home WCE) was a better estimate of true WCE than ambulatory WCE. In 73 young...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3283589ee6
更新日期:2012-11-01 00:00:00
abstract:OBJECTIVES:To assess the predictive role of changes in albuminuria on the loss of renal function under antihypertensive treatment in patients with type 2 diabetes (T2D). METHODS:Clinical records from a total of 12 611 patients with hypertension and T2D, attending 100 antidiabetic centers in Italy, with normal estimate...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001749
更新日期:2018-08-01 00:00:00
abstract:BACKGROUND:Patients with type-2 diabetes have a high prevalence of hypertension and show an elevated incidence of cardiovascular events and nephropathy. OBJECTIVES:Recent randomized trials of antihypertensive therapy providing information about cardiovascular and renal risk in diabetes, blood pressure goals and best s...
journal_title:Journal of hypertension
pub_type: 杂志文章,评审
doi:10.1097/00004872-200211000-00001
更新日期:2002-11-01 00:00:00
abstract:OBJECTIVE:To clarify the spectrum of the left ventricular responses in hypertension in man by means of coupled analysis of elastances. In the present study we analysed the 'functional' coupling of the left ventricle and the arterial system in terms of the arterial effective elastance (E(a)) divided by a value of end-sy...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1994-05-01 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:OBJECTIVES:Several genome-wide scans recently accomplished in the ethnic Chinese revealed a number of candidate loci possibly contributing to essential hypertension, and some appeared to be replicable in 2q14-q23 and 5q32. The current study aimed to examine the linkage of qualitative and blood pressure quantitative tra...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200302000-00021
更新日期:2003-02-01 00:00:00
abstract:OBJECTIVE:Secondary activation of the renin-angiotensin system plays a major role in the progression of chronic nephropathies, and blockade of endothelin (ET) receptors has been shown to confer nephroprotection in experimental models of proteinuric renal disease. We tested the nephroprotective potential of selective en...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200312000-00028
更新日期:2003-12-01 00:00:00
abstract:OBJECTIVES:Renal tubular sodium handling was measured in healthy subjects submitted to acute and chronic salt-repletion/salt-depletion protocols. The goal was to compare the changes in proximal and distal sodium handling induced by the two procedures using the lithium clearance technique. METHODS:In nine subjects, acu...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00004872-200018110-00018
更新日期:2000-11-01 00:00:00
abstract:OBJECTIVE:Molecular variants of the angiotensinogen (AGT) and the angiotensin II type 1 receptor (ATR) genes have been associated with the risk of coronary artery disease (CAD) and myocardial infarction (MI), but data so far available are conflicting. The primary object of the paper is to verify this possible associati...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200105000-00007
更新日期:2001-05-01 00:00:00
abstract:AIMS:In order to eventually improve blood pressure (BP) management, the aim of this study was to identify subgroups of type 2 diabetes mellitus (T2DM) patients with distinct trajectories of SBP levels. Identifying subgroups with distinct SBP trajectories helps to better understand the course of SBP levels in T2DM patie...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000680
更新日期:2015-10-01 00:00:00
abstract:OBJECTIVE:The pteridine cofactor tetrahydrobiopterin (BH4) has emerged as a critical determinant of endothelial nitric oxide synthase (eNOS) activity. When BH4 availability is limited, eNOS does not produce nitric oxide (NO) but instead generates superoxide. BH4 may reverse endothelial dysfunction due to cardiovascular...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000173520.13976.7d
更新日期:2005-07-01 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:To investigate the effects of prolonged hypertension in the absence of cardiac hypertrophy on the blood pressure-heart rate reflex during acute and chronic NO synthase blockade. METHODS:Male Wistar rats were treated acutely with N omega-nitro-L-arginine methyl ester (L-NAME, 50 mg/kg intraperitoneally) or ch...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199610000-00009
更新日期:1996-10-01 00:00:00
abstract:AIM:Since canine hereditary essential hypertension has been previously reported in a colony of Siberian husky dogs, we tested the suitability of this model for use in studies on the platelet defect identified in humans with essential hypertension. METHODS:Platelet aggregation and dense granule ATP secretion were measu...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199210120-00009
更新日期:1992-12-01 00:00:00