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:in vivo renal blood flow responses to intrarenally administered angiotensin II, phenylephrine and acetylcholine were compared in 10-week-old SHR and Wistar-Kyoto (WKY) rats using a wide range of doses from near threshold to near maximal effect. Unbiased stereological techniques and high-resolution light microscopy were used to estimate the surface area and length of glomerular capillaries, and evidence of capillary damage. RESULTS:The SHR renal bed demonstrated significantly enhanced dose-vascular resistance responses to vasoconstrictors. For vascular conductance and calculated radius of resistance vessels, the SHR curves were significantly lower across the full dilator-constrictor range examined, but the dose-related changes were similar to those of WKY rats. There were only modest enhancements of the renal blood flow responses in the SHR, evident only when renal blood flow was reduced by more than 50% SHR and WKY rats did not differ in mean glomerular capillary surface area (0.13+/-0.02 mm2 and 0.14+/-0.02 mm2, respectively) or length (5.76+/-0.85 mm and 5.48+/-0.90 mm, respectively) nor was there evidence of glomerular capillary damage in either strain. CONCLUSIONS:The renal vascular bed of the SHR in vivo exhibits reduced vascular conductance across a wide vasomotor range, compatible with findings in other vascular beds. We have further shown no evidence of reduced glomerular capillary surface area or damage. These findings are compatible with the hypothesis that the reduced conductance of the SHR pre-glomerular vasculature increases the aorta-capillary pressure gradient thus protecting the glomerular capillaries from systemic hypertension at this age.
journal_name
J Hypertensjournal_title
Journal of hypertensionauthors
Kett MM,Bergström G,Alcorn D,Bertram JF,Anderson WPdoi
10.1097/00004872-200108000-00020subject
Has Abstractpub_date
2001-08-01 00:00:00pages
1505-12issue
8eissn
0263-6352issn
1473-5598journal_volume
19pub_type
杂志文章abstract:OBJECTIVES:To describe patterns of hypertension history in patients with various types of end-stage renal disease (ESRD) and in persons with normal kidney function; and to identify risk factors for the diagnosis 'hypertensive ESRD'. DESIGN:A case-control study. SETTING:Population-based. PARTICIPANTS:Patients with ES...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199715040-00016
更新日期:1997-04-01 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:Hypertension is associated with endothelial dysfunction characterized by decreased endothelium-dependent relaxations and increased endothelium-dependent contractions. Angiotensin converting enzyme inhibitors and thromboxane A2 receptor antagonists decreased the endothelium dysfunction in hypertensive animals...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199715060-00007
更新日期:1997-06-01 00:00:00
abstract:OBJECTIVES:Polymorphisms in microRNA genes are related to the risk of ischemic stroke, but the association between miR-34b/c polymorphisms and the risk of ischemic stroke has not been reported. METHODS:MiR-34b/c rs2187473 and rs4938723 polymorphisms were genotyped by Snapshot assay among 495 controls and 492 ischemic ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002413
更新日期:2020-08-01 00:00:00
abstract::A unique tissue kallikrein-binding protein was identified and partially characterized in the brain and serum of Sprague-Dawley rats and in the serum-free conditioned media of mouse anterior pituitary cells (AtT 20) and rodent neuroblastoma x glioma hybrids (NG108-15). Kallikrein and kallikrein-binding protein(s) form ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198807000-00006
更新日期:1988-07-01 00:00:00
abstract:OBJECTIVE:In essential hypertensive patients, blunted renal plasma flow responsiveness to angiotensin II suggests a pathologic increase in angiotensin II in the kidneys. This blunting has been associated with the angiotensinogen 235TT genotype. As several measures of renal function decline with age, we sought to determ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282ffb417
更新日期:2008-07-01 00:00:00
abstract::Cardiovascular risk increases with chronological as well as biological aging, and one marker of this might be telomere length. The telomere cap is located at the end of the DNA helix and serves to protect its end. This is an evolutionary adaptation which has resulted in stabilization of the DNA strand within the chrom...
journal_title:Journal of hypertension
pub_type: 杂志文章,评审
doi:10.1097/HJH.0b013e328353e512
更新日期:2012-06-01 00:00:00
abstract:OBJECTIVE:The prognostic importance of the nocturnal blood pressure (BP) fall and early-morning surge were scarcely investigated in patients with resistant hypertension (RHT). We investigated them in a prospective cohort of 1726 RHT individuals. METHODS:The nocturnal fall and morning surge were calculated from the bas...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002775
更新日期:2021-01-11 00:00:00
abstract:OBJECTIVE:To investigate the association of serum uric acid level with the risk for hypertension and Type 2 diabetes. DESIGN:Prospective cohort study. SETTING:Work site in Osaka, Japan. PARTICIPANTS:A total of 6,356 Japanese men, aged 35-60 years with systolic blood pressure < 140 mmHg and diastolic blood pressure <...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200107000-00005
更新日期:2001-07-01 00:00:00
abstract:OBJECTIVE:The physiopathological mechanisms implicated in hypertensive heart disease are multi-factorial, including myocyte hypertrophy, apoptosis and myocardial remodelling. In this process, some hormonal and local growth factors have a regulatory influence. The aim of this study was to evaluate the potential role of ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000493
更新日期:2015-04-01 00:00:00
abstract:BACKGROUND:The effects of aspirin in subjects without cardiovascular disease are controversial. In the intensively treated patients of the Hypertension Optimal Treatment (HOT) Study, randomization to low-dose aspirin (75 mg daily) versus placebo significantly reduced cardiovascular events (-15%) and myocardial infarcti...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00004872-200211000-00031
更新日期:2002-11-01 00:00:00
abstract:OBJECTIVE:To evaluate autonomic nervous function by power-spectral analysis of heart-rate variability in salt-sensitive and non-salt-sensitive patients with essential hypertension under the conditions of low and high salt intakes. DESIGN AND METHODS:The blood pressures, heart rates, and electrocardiogram R-R intervals...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199715070-00004
更新日期:1997-07-01 00:00:00
abstract:OBJECTIVE:Marfan syndrome (MFS) is an autosomal dominant genetic disorder characterized by aortic root dilation and dissection and an abnormal fibrillin-1 synthesis. In this observational study, we evaluated aortic stiffness in MFS and its association with ascending aorta diameters and fibrillin-1 genotype. METHODS:A ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001512
更新日期:2018-01-01 00:00:00
abstract:OBJECTIVES:This study presents a reliable index inspired by the total variability concept of real analysis in mathematics, called average real variability (ARV), for the prognostic significance of blood pressure variability (BPV) overcoming the pitfalls of the commonly used standard deviation (SD). BACKGROUND:Recent s...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000160205.81652.5a
更新日期:2005-03-01 00:00:00
abstract:OBJECTIVE:The aim of the present study was to investigate possible inter-relationships between connective tissue growth factor (CTGF) and aldosterone in vascular and renal damage associated with hypertension. METHOD:Spontaneously hypertensive rats (SHR) were treated with two doses (100 and 30 mg/kg per day) of the min...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3280112ce5
更新日期:2007-03-01 00:00:00
abstract::The concentrations of neuropeptide Y immunoreactivity (NPY-ir) were measured in the cortex and cervical, thoracic and lumbar spinal cord of 8-, 18- and 31-week-old normotensive Wistar-Kyoto (WKY) rats and spontaneously hypertensive rats (SHR). This peptide was measured using a highly sensitive and specific radio-immun...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198608000-00012
更新日期:1986-08-01 00:00:00
abstract:OBJECTIVE:Some cases of pseudopheochromocytoma have been described among hypertensive patients with obstructive sleep apnea (OSA). This study examined whether a pathological rise of urinary metanephrines is a common feature in hypertensive OSA patients and, in such a case, whether the ventilation treatment during sleep...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001507
更新日期:2018-01-01 00:00:00
abstract::Systemic and regional haemodynamic effects of renal denervation were evaluated in adult (six-month-old) male spontaneously hypertensive rats (SHR) using the Fick procedure and electromagnetic flowmetry technique. Renal denervation (bilateral, 10% phenol in ethanol), performed five to eight days before the experiment, ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198312000-00010
更新日期:1983-12-01 00:00:00
abstract:OBJECTIVE:Considering the growing body of evidence that indicates the contribution of superoxide anions (O2) and other reactive oxygen species (ROS) to the development of hypertension, we assessed whether animal models of hypertension have a benefic effect with tempol, a superoxide dismutase mimetic, to help augment th...
journal_title:Journal of hypertension
pub_type: 杂志文章,meta分析,评审
doi:10.1097/HJH.0000000000000422
更新日期:2015-01-01 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: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:Increased wall-to-lumen ratio of small arteries is a predictor of adverse cardiovascular prognosis. We aimed to analyze retinal arteriolar structure in never-treated patients with essential hypertension and to test whether elevated blood pressure is associated with an increased wall-to-lumen ratio of retinal ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282ffdc66
更新日期:2008-07-01 00:00:00
abstract:OBJECTIVES:Hemodialysis patients have a cardiovascular mortality rate of 20-40 times that of the general population. Aldosterone inhibition by spironolactone has exerted beneficial, prognostically significant cardiovascular effects in patients with heart failure maintained on hemodialysis or peritoneal dialysis. Our ai...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章
doi:10.1097/HJH.0b013e32835f955c
更新日期:2013-06-01 00:00:00
abstract:OBJECTIVE:To introduce a new method, the smoothness index, for assessing the homogeneity of 24 h blood pressure reduction by antihypertensive treatment and to compare it with the trough : peak ratio; and to assess the ability of both indices to predict a reduction in the left ventricular mass index induced by treatment...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章
doi:10.1097/00004872-199816110-00016
更新日期:1998-11-01 00:00:00
abstract::An Na+,K+-ATPase inhibitor possessing inhibitory activity against the specific binding of ouabain to Na+,K+-ATPase has been purified from the plasma of acutely saline-infused hogs. The purification was performed by a combination of Amberlite XAD-2 adsorption chromatography and five steps of high-pressure liquid chroma...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198704000-00014
更新日期:1987-04-01 00:00:00
abstract:BACKGROUND:The aldosterone synthase gene (CYP1B2) locus is a candidate region involved in the development of hypertension. OBJECTIVE:To study the relationship between the C-344T CYP1B2 polymorphism, plasma aldosterone, renin activity and blood pressure in a multi-ethnic population. DESIGN:Population-based, cross-sect...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200410000-00011
更新日期:2004-10-01 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 evaluate the consistency between a randomly recruited Western European population and the participants of the Framingham Heart Study, with respect to the rates and determinants of progression to hypertension. METHODS:Among the non-hypertensive individuals enrolled in the Flemish Study on Environment, Gene...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000242395.07473.92
更新日期:2006-09-01 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:BACKGROUND:Recent studies indicated that central SBP could be estimated by radial late-SBP (rSBP2) with a small disparity. However, most of these studies were conducted by SphygmoCor with a transfer function. The agreement between rSBP2 and central SBP was also tested in several invasive studies, but with inconsistent ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e328342f05f
更新日期:2011-04-01 00:00:00