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 disease, including atherosclerosis, coronary artery disease and hypertension. In this study, the influence of BH4 on cardiovascular parameters and the production of free radicals following angiotensin II (Ang II) infusion was assessed. METHODS:BH4 (20 mg/kg per day in drinking water) was administered with Ang II (300 ng/kg per min subcutaneously, osmotic pump) for 7 days in Sprague-Dawley rats. In addition, BH4 was also given in vehicle-infused rats. RESULTS:Treatment with BH4 significantly prevented some of the effects of Ang II, such as impaired vascular responses to acetylcholine, hypertension and increases in heart weight index values. Treatment with BH4 also significantly reduced Ang II-induced increases in inducible NO synthase expression, nitrotyrosine immunostaining, NO production and superoxide anion formation in rats. CONCLUSION:These results indicate that BH4 might prevent the development of hypertension and myocardial hypertrophy, as well as the Ang II-induced production of superoxide and NO, thereby reducing the production of peroxynitrite. Therefore, BH4 may protect against the cardiovascular manifestations of oxidative and nitrosative stress in this experimental model of Ang II-mediated hypertension.
journal_name
J Hypertensjournal_title
Journal of hypertensionauthors
Kase H,Hashikabe Y,Uchida K,Nakanishi N,Hattori Ydoi
10.1097/01.hjh.0000173520.13976.7dsubject
Has Abstractpub_date
2005-07-01 00:00:00pages
1375-82issue
7eissn
0263-6352issn
1473-5598pii
00004872-200507000-00013journal_volume
23pub_type
杂志文章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:The Fas-Fas ligand (FasL) system is involved in apoptosis in many types of cells. Recently, the expression of FasL on endothelial cells was reported. FasL is cleaved by a metalloproteinase and released in serum as soluble FasL (sFasL). Vasoactive substances, including metalloproteinase, are modulated by endo...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200205000-00024
更新日期:2002-05-01 00:00:00
abstract:OBJECTIVES:Urotensin II is the most potent vasoconstrictor known. Its role in hypertension has not been investigated. Here, we studied the plasma levels in hypertensive and normotensive human subjects. DESIGN:A cross-sectional case-control study. SETTING:Hypertension clinic and research clinic of a university teachin...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000125452.28861.f1
更新日期:2004-07-01 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:OBJECTIVES:Lower parental education is associated with higher adolescent blood pressure (BP). We examined the contribution of modifiable risk factors from infancy to adolescence that could potentially explain the link between parental education and SBP and DBP in the offspring. METHODS:In a prospective Chinese birth c...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001003
更新日期:2016-09-01 00:00:00
abstract:OBJECTIVE:The effect of brief, prehypertensive therapy by angiotensin-converting enzyme inhibition (ACEi) with perindopril on the structure and function of large arteries was studied in rats. METHODS:Spontaneously hypertensive rats (SHR) received perindopril (3 mg/kg per day) between the ages of either 6 and 10 weeks ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3283562e35
更新日期:2012-09-01 00:00:00
abstract:BACKGROUND:We examined the relation between cardiovascular reactivity (the response of the cardiovascular system to psychological stress) and the severity and progression of carotid atherosclerosis. METHODS:Using duplex ultrasonography, we measured the change in the area of all detectable plaques in the extracranial c...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199715010-00004
更新日期:1997-01-01 00:00:00
abstract:OBJECTIVES:Recent epidemiological studies have reported inverse associations between vitamin D status and blood pressure. The study aim is to determine if exposure to ultraviolet B radiation, which synthesizes vitamin D, lowers blood pressure, compared with ultraviolet A radiation. METHODS:Men and women (n = 119) with...
journal_title:Journal of hypertension
pub_type: 杂志文章,随机对照试验
doi:10.1097/HJH.0b013e328349666d
更新日期:2011-09-01 00:00:00
abstract:OBJECTIVE:Cardiac hypertrophy arises as an adaptive response to increased afterload. Studies in knockout mice have shown that catecholamines, but not alpha1-adrenergic receptors, are necessary for such an adaptation to occur. However, whether beta-adrenergic receptors are critical for the development of cardiac hypertr...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000203843.41937.2a
更新日期:2006-03-01 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:BACKGROUND:Enhanced mechanical forces, e.g. in arterial hypertension, stimulate the formation of reactive oxygen species (ROS) by the NAD(P)H oxidase. Since bone marrow derived endothelial progenitor cells (EPCs) contribute to vascular remodeling and repair, we investigated whether renovascular hypertension stimulates ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282f09f79
更新日期:2008-02-01 00:00:00
abstract::Calcium blockers may reduce contractility of vascular smooth muscle as well as that of myocardial cells. Therefore, falls in both total peripheral vascular resistance (TPR) and cardiac output (CO) might be responsible for a fall in blood pressure (BP) caused by calcium blockers in essential hypertension. We have studi...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章
doi:
更新日期:1988-02-01 00:00:00
abstract:OBJECTIVE:We have previously shown that conduit arteries of normotensive (WKY) and hypertensive (SHR) Japanese rats differ from normotensive (LN) and hypertensive (LH) Lyon rats in terms of lower aortic thickness and higher collagen III content, whereas differences in vasoactive properties are unknown. METHODS:Aortic ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199917100-00007
更新日期:1999-10-01 00:00:00
abstract:OBJECTIVES:Genetic variants that influence large conductance calcium-activated potassium channel's function may alter arterial function and contribute to the known heritability of arterial stiffness and blood pressure. The beta1-subunit (KCNMB1) of the large conductance calcium-activated potassium channel includes two ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e328317c8ae
更新日期:2009-01-01 00:00:00
abstract:OBJECTIVE:To determine the long-term efficacy and safety of a fixed, very-low-dose tablet combining one-half the standard dose of perindopril with one-quarter the standard dose of indapamide as first-line treatment in elderly patients. DESIGN:Double-blind, randomized, placebo-controlled study in an outpatient setting....
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1097/00004872-200018030-00013
更新日期:2000-03-01 00:00:00
abstract:OBJECTIVE:To determine the blood pressure responses in elderly normotensive men and women to dietary sodium and to the diunsaturated fatty acid dihomogammalinolenic acid (DGLA), which is derived from linoleic acid. DESIGN:Blood pressure responses were assessed in 66 subjects (36 male, 30 female; mean age 65 years) on ...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00004872-199312000-00011
更新日期:1993-12-01 00:00:00
abstract:OBJECTIVE:The objective of the present studies is to investigate if the enhanced expression of Gs alpha protein and their mRNA observed in various models of hypertensive rats is due to the expressed hypertrophy or hypertension. METHODS:Hypertension, in Sprague-Dawley rats was induced by the oral administration of the ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200018080-00013
更新日期:2000-08-01 00:00:00
abstract::Angioplasty of renal artery stenosis has been used extensively in the last two decades for treating renovascular hypertension, and, more recently, for preserving the jeopardized renal function. A large body of evidence has accumulated indicating that this approach is by far the most convenient for patients with fibrom...
journal_title:Journal of hypertension
pub_type: 杂志文章,评审
doi:10.1097/00004872-199917120-00001
更新日期:1999-12-01 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: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:BACKGROUND:Blood pressure (BP)-lowering trials studying efficacy mostly assesses binary outcome events, for example stroke/no stroke. Analysis of ordered categorical vascular events (e.g. three levels: fatal stroke/nonfatal stroke/no stroke) provides information on severity and is more powerful statistically than analy...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e32833c7a32
更新日期:2010-10-01 00:00:00
abstract:OBJECTIVE:To test the hypothesis that in the stroke-prone spontaneously hypertensive rat (SHRSP), the pressor effect of selective dietary chloride loading depends on a positive external sodium balance. METHODS:In 43 male SHRSP fed a Japanese style diet containing a low normal amount of NaCl (0.4%), we compared the eff...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3283316cfc
更新日期:2010-01-01 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:OBJECTIVES:To study the relation between the blood pressure and the neurocognitive function within the full adult age range in a large population sample. DESIGN:A cross-sectional study of 936 healthy adults who were recruited from a register of family practices, stratified for age (24-81 years), sex, and occupational ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199715100-00004
更新日期:1997-10-01 00:00:00
abstract::The hormonal and hypotensive effects of a single oral 10 mg dose of enalapril (MK-421), were assessed by a double-blind randomized trial in 12 subjects with essential hypertension, during a 100 and 40 mmol/day sodium intake. Peak serum MK-421 appeared 1 h following oral dosage. The bioactive conversion product of MK-4...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章
doi:
更新日期:1984-08-01 00:00:00
abstract::The plasma concentration of atrial natriuretic peptide (ANP) and the density and affinity of binding sites for ANP in platelets was investigated in patients with essential hypertension. Severe hypertensives were studied whilst still on medication. All subjects were ambulatory and were investigated after 3 days on a 13...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-198807000-00008
更新日期:1988-07-01 00:00:00
abstract:OBJECTIVE:Metabolic syndrome is associated with a high risk of cardiovascular disease in hypertension. We evaluated whether metabolic syndrome is associated with early vascular alterations, such as increased peripheral wave reflections and endothelial dysfunction, in untreated essential hypertensive patients. METHODS:...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282fa7158
更新日期:2008-06-01 00:00:00
abstract:BACKGROUND:In this study, we tested the hypothesis that long-term Rho-kinase inhibition would reverse nitro-L-arginine methyl ester-exacerbated nephrosclerosis in spontaneously hypertensive rats and attempted to elucidate the mechanism involved. METHODS:Five groups (each n = 8) were studied: untreated spontaneously hy...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e328305086c
更新日期:2008-09-01 00:00:00
abstract:BACKGROUND:In the BEtter control of BP in hypertensive pAtients monitored Using the HOTMAN sYstem study, we investigated whether utilizing noninvasive monitoring of hemodynamic parameters combined with a drug selection algorithm (integrated hemodynamic management - IHM) compared with conventional drug selection may imp...
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/HJH.0000000000000749
更新日期:2015-12-01 00:00:00
abstract:BACKGROUND:Shear wave elastography (SWE) directly quantifies the local arterial wall stiffness by calculating the elastic modulus. However, whether carotid wall elastic modulus can predict obstructive coronary artery disease (CAD) is not well known. We aimed to investigate the value of carotid wall elastic modulus meas...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002773
更新日期:2020-12-14 00:00:00