Abstract:
BACKGROUND:Peroxisome proliferator-activated receptor (PPAR)-alpha has been implicated in the regulation of normal and pathological cellular functions, but the effect of specific gene silencing on PPARalpha-mediated function is not fully defined. AIM:This study evaluated the role of PPARalpha in hypertensive renal injury induced by nitric oxide withdrawal and high salt (4% NaCl) diet [high salt/N(omega)-nitro-L-arginine (L-NNA)]. METHODS:Three PPARalpha siRNA clones, siRNA(790-811), siRNA(974-995) or siRNA(1410-1431), directed at the DNA or ligand binding domain of PPARalpha mRNA or scrambled siRNA was cloned into plasmid expression vector and was injected (10 microg intravenously) in hypertensive rats. Twenty-four-hour readings of blood pressure and heart rate were taken in conscious rats using radiotelemetry. Kidney injury was evaluated by determining N-acetyl-beta-glucosaminidase excretion, expression of kidney injury molecule-1 and histopathology. PPARalpha mRNA and protein expression were also determined. RESULTS:High salt/L-NNA increased PPARalpha mRNA expression three-fold, and this was abolished in rats treated with PPARalpha siRNA(790-811), siRNA(974-995) or siRNA(1410-1431). High salt/L-NNA also increased blood pressure but reduced heart rate without affecting pulse pressure. However, blood pressure was further increased in rats treated with PPARalpha siRNA(790-811) (37 +/- 3%, P < 0.05). High salt/L-NNA also increased N-acetyl-beta-glucosaminidase excretion and expression of kidney injury molecule-1. However, PPARalpha siRNA(790-811) did not affect N-acetyl-beta-glucosaminidase excretion but reduced kidney injury molecule-1 expression. Histopathology of kidney tissues in high salt/L-NNA-treated rats revealed global, fibrinoid and tubular interstitial necrosis that was blunted by PPARalpha siRNA(790-811). CONCLUSION:These data suggest that increased PPARalpha expression is a protective mechanism in hypertensive renal injury induced by nitric oxide withdrawal/high salt diet and that siRNAs targeting the DNA-binding domain of PPARalpha gene elicited differential effects on hypertension and kidney injury.
journal_name
J Hypertensjournal_title
Journal of hypertensionauthors
Newaz M,Ranganna K,Truong LD,Oyekan Adoi
10.1097/HJH.0b013e328330b6d9subject
Has Abstractpub_date
2009-11-01 00:00:00pages
2223-31issue
11eissn
0263-6352issn
1473-5598journal_volume
27pub_type
杂志文章abstract:OBJECTIVE:Recent studies have shown that the heptapeptide angiotensin-(1-7) [Ang-(1-7)] exerts important vasoactive actions and can act as an endogenous physiological antagonist of angiotensin II (Ang II) within the renin-angiotensin system (RAS). The present study was performed to evaluate the effects, first, of chron...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e32832f0d06
更新日期:2009-10-01 00:00:00
abstract:OBJECTIVES:Some beta-blockers are less effective in reducing central blood pressure than other antihypertensive drugs, which may explain the higher rate of events in subjects randomized to atenolol in recent trials. We hypothesized that nebivolol, a mixed beta-blocker/nitro-vasodilator, would be more effective than ate...
journal_title:Journal of hypertension
pub_type: 杂志文章,随机对照试验
doi:10.1097/HJH.0b013e3282f283c9
更新日期:2008-02-01 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:The C825T single nucleotide polymorphism of the G-protein beta3 (GNB3) has been implicated in susceptibility to essential hypertension, through the expression of an alternatively spliced truncated variant. In an effort to clarify earlier inconclusive results, we performed a meta-analysis of population-based ...
journal_title:Journal of hypertension
pub_type: 杂志文章,meta分析
doi:10.1097/HJH.0b013e328011db24
更新日期:2007-03-01 00:00:00
abstract:OBJECTIVE:To evaluate the prognostic significance of cardiovascular risk factors including 24-h ambulatory blood pressure level and rhythm for all-cause mortality in type 2 diabetic patients. METHODS:In a prospective observational study, 104 patients with type 2 diabetes were followed: 51 patients with diabetic nephro...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282f06428
更新日期:2007-12-01 00:00:00
abstract:OBJECTIVE:Arterial hypertension is recurrently associated with inflammation of the endothelium as an effect of the upregulation of functional molecules, including cytokines, adhesion molecules and chemokines. However, the role of monocyte chemoattractant protein-1 (MCP-1) in maintaining the inflammatory state of endoth...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000234111.31239.c3
更新日期:2006-07-01 00:00:00
abstract:BACKGROUND:The objective of this study was to estimate the prevalence and distribution of hypertension and to determine the status of hypertension awareness, treatment and control in the Portuguese adult population. METHODS:This study was conducted in 2003, and a multistage cluster sampling method was used to select a...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000179908.51187.de
更新日期:2005-09-01 00:00:00
abstract::The effects of age on the circadian blood pressure rhythm of patients with untreated essential hypertension (n = 133, World Health Organization stage I or II) were compared with those of normotensive subjects (n = 91). Subjects were classified into three groups by age: young (less than 40 years old), adult (40-59 year...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199105000-00004
更新日期:1991-05-01 00:00:00
abstract:OBJECTIVES:Human adrenomedullin precursor is converted to glycine-extended adrenomedullin (AM-Gly), an intermediate inactive form of adrenomedullin. Subsequently, AM-Gly is converted to active form of mature adrenomedullin (AM-m). The aim of the present study was to investigate (i) whether sex or age influences plasma ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200104000-00014
更新日期:2001-04-01 00:00:00
abstract:OBJECTIVE:To validate a computer-based method for measuring the calibre of retinal blood vessels, and use it to determine the effects of ageing and arterial hypertension on the calibres of these vessels and on their ratio. METHODS:Digital eye fundus images covering a 50 degrees field and centred on the optic disc were...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章
doi:10.1097/01.hjh.0000163154.35577.8e
更新日期:2005-04-01 00:00:00
abstract:OBJECTIVE:To determine the role of current weight in mediating the relationship between birth weight and blood pressure within the context of the 'fetal origins' hypothesis. DESIGN:Prospective cohort study of 2507 pregnant women and their singleton offspring, delivered live at term, in Perth, Western Australia between...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章
doi:10.1097/00004872-200018080-00003
更新日期:2000-08-01 00:00:00
abstract:OBJECTIVE:In patients with type 2 diabetes mellitus (T2DM), blocking of the renin-angiotensin-aldosterone system (RAAS) has demonstrated efficacy in lowering blood pressure (BP) and urinary albumin excretion rate (UAER). Nonetheless, not all patients successfully respond to RAAS blockade with a reduction in BP and UAER...
journal_title:Journal of hypertension
pub_type: 杂志文章,随机对照试验
doi:10.1097/HJH.0b013e32834a8a25
更新日期:2011-10-01 00:00:00
abstract:BACKGROUND:Recent cross-sectional studies have suggested that higher serum sodium levels may be a marker of elevated blood pressure. It is unclear whether serum sodium levels are related to the risk of developing hypertension in the community. METHODS:We investigated the association of serum sodium with longitudinal b...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e32830fe4a5
更新日期:2008-11-01 00:00:00
abstract:OBJECTIVE:To investigate methods to diagnose renal artery stenosis (RAS) among the general hypertensive population. METHODS:We studied the value of clinical and biochemical characteristics at the outpatient clinic to identify subjects with a renal artery narrowing of more than 50% of the luminal surface among 1047 hyp...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1996-08-01 00:00:00
abstract:BACKGROUND:Few studies have directly compared the effects of different angiotensin receptor blockers (ARBs) on mechanisms involved in the pathogenesis of cardiovascular disease. METHODS:We studied the ability of different ARBs to inhibit the proliferation of vascular smooth muscle cells (VSMCs) and cardiac fibroblasts...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282f56ba5
更新日期:2008-05-01 00:00:00
abstract:BACKGROUND:Angiotensin-converting enzyme (ACE) insertion/deletion (I/D) polymorphism-related differences in ACE concentration do not result in differences in angiotensin levels. METHODS AND RESULTS:To investigate whether this relates to differences in the contribution of the ACE C-domain and N-domain, we quantified, u...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282f465d2
更新日期:2008-04-01 00:00:00
abstract::Hypertensive disease is known to increase the risks in connection with acute changes in blood pressure due to the presence of pronounced structural as well as functional changes in the cardiovascular system. In the present study the metabolic consequences of fixed haemorrhagic hypotension [mean arterial pressure (MAP)...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198310000-00005
更新日期:1983-10-01 00:00:00
abstract:BACKGROUND:Activated coagulation Factor XII (FXIIa) infusion increases peripheral resistance (TPR) and mean arterial pressure (MAP) of Brown Norway but not plasma kininogen deficient Brown Norway Katholiek (BNK) rats. FXIIa concentrations are elevated in hypertensive end-stage renal disease patients receiving conventio...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000192
更新日期:2014-07-01 00:00:00
abstract::The purpose of this study was to examine pressor responsiveness in a rabbit model with adrenal perturbation. Adrenals in rabbits were stabbed with a needle, and the rabbits were given water (adrenal-water group) or 0.9% NaCl (adrenal-salt) to drink; additional rabbits were sham-operated and given water (sham-water gro...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198502000-00014
更新日期:1985-02-01 00:00:00
abstract:OBJECTIVE:Studies of experimental animals show glomerular hypertension to be important in the progression of glomerular disease. We evaluated this connection clinically by examining the relationship between glomerular hemodynamics and histological changes in patients with immunoglobulin (Ig)A nephropathy. METHODS:The ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200018010-00015
更新日期:2000-01-01 00:00:00
abstract:BACKGROUND:Several cytokines and adhesion molecules released from endothelium play an important role in inflammation, immune responses, and probably atherogenesis. OBJECTIVE:To determine whether the transcription factor nuclear factor-kappaB mediated expression of these genes involved in the inflammatory response of e...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199816070-00013
更新日期:1998-07-01 00:00:00
abstract::We have examined the mechanisms mediating the release of renin elicited in man by reduction of renal perfusion pressure. Fifteen patients with essential hypertension and six normotensive subjects were investigated during diagnostic renal arteriography. Renal neural receptors were inhibited by propranolol (10 mg i.v.) ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198502000-00007
更新日期:1985-02-01 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: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:To investigate relationships between birth characteristics and blood pressure at age 20 years and to assess whether effects of birth weight on blood pressure are amplified from childhood to adulthood. DESIGN:A longitudinal study of 584 men and women from Adelaide, Australia, examined previously at 8 years an...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199917070-00003
更新日期:1999-07-01 00:00:00
abstract:OBJECTIVE:To evaluate endothelium-dependent vascular function in obstructive sleep apnoea patients. DESIGN AND METHODS:Forearm blood flow and vascular resistance were studied in eight normotensives and eight obstructive sleep apnoea patients and also in eight normotensive and eight hypertensive controls after graded b...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199605000-00006
更新日期:1996-05-01 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::Many physiological variables known or thought to affect erythrocyte Na+,K+-cotransport are altered in pregnancy. The interrelationships of Na+,K+-cotransport and pregnancy were therefore examined. Values were elevated by more than 30% in both second and third trimesters with a return towards non-pregnant levels in the...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1988-02-01 00:00:00
abstract:BACKGROUND:Nitric oxide is involved in the regulation of vascular basal tone and blood pressure. Polymorphisms of NOS3, the gene that codes for endothelial nitric oxide synthase, have been associated with essential hypertension. OBJECTIVE:To look for linkage and association of three di-allelic polymorphisms (Glu298Asp...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000163144.74588.ad
更新日期:2005-04-01 00:00:00
abstract::Hypertension was induced in marmosets by ligating the minor branch of one renal artery. The blood pressure (BP), measured by a tail-cuff method, increased to hypertensive levels within 4-5 weeks and the maximum increases occurred after 4-15 weeks (BP, mean +/- s.e.m. was 120 +/- 3 and 152 +/- 6 mmHg before and 10 week...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198712000-00015
更新日期:1987-12-01 00:00:00