Abstract:
BACKGROUND:We have previously described anatomical changes in pulmonary blood flow distribution in chronic hypoxic rats, associated with pulmonary arterial hypertension (PAH). METHOD:In this study, we utilized synchrotron radiation microangiography to compare these changes in pulmonary blood flow with a PAH-model induced with monocrotaline (MCT), as the etiology for these two models of PAH is different. Three weeks after a subcutaneous injection of MCT (60 mg/kg) or vehicle (control), Sprague-Dawley rats were anesthetized, and microangiography was performed on the left lung to assess branching distribution of pulmonary blood flow and changes in vessel diameter during acute (8% O2 for 4 min) hypoxic pulmonary vasoconstriction--before and after sympathetic beta-adrenoceptor blockade (propranolol, 2 mg/kg, intravenous). Comparisons were made with chronic hypoxic rats using data previously published. RESULTS:We observed that adverse changes in pulmonary blood flow were comparable for both chronic hypoxia and MCT models of PAH. Specifically, the number of opaque third and fourth generation vessels was significantly and equally fewer than that of control rats. The acute hypoxic pulmonary vasoconstriction was not altered in the hypertensive lung, though sympathetic modulation of pulmonary vasoreactivity was enhanced by chronic hypoxia, but not MCT. CONCLUSION:In summary, we have demonstrated comparable adverse changes in pulmonary blood flow for chronic hypoxia and MCT models of PAH. In contrast, modulation of the hypoxic pulmonary vasoconstriction differs between the two PAH models, likely due to the impact that different pathological pathways have on the physiology of the whole organism. Such differences between models of PAH should be considered in future studies.
journal_name
J Hypertensjournal_title
Journal of hypertensionauthors
Schwenke DO,Pearson JT,Shimochi A,Kangawa K,Tsuchimochi H,Umetani K,Shirai M,Cragg PAdoi
10.1097/HJH.0b013e32832af6a1subject
Has Abstractpub_date
2009-07-01 00:00:00pages
1410-9issue
7eissn
0263-6352issn
1473-5598journal_volume
27pub_type
杂志文章abstract::To evaluate factors influencing hemodynamic responses to psychological and physical stress, 117 normotensive college students were studied. The standardized tests included arithmetic, Stroop word-color, mirror draw, isometric handgrip and cold pressor challenges. The responses of blood pressure and pulse during the te...
journal_title:Journal of hypertension
pub_type: 临床试验,杂志文章
doi:10.1097/00004872-199010000-00012
更新日期:1990-10-01 00:00:00
abstract:RATIONALE:Cicletanine (CIC), an anti-hypertensive compound with direct vascular and natriuretic actions, is especially effective in salt-sensitive hypertension, in which dysregulation of the sodium pump plays an important pathogenic role, and digitalis-like cardiotonic steroids contribute to increased vascular tone. Th...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200018020-00012
更新日期:2000-02-01 00:00:00
abstract:OBJECTIVE:The inverse association between socioeconomic status (SES) and cardiovascular disease (CVD) risk is well documented. Aortic stiffness assessed by aortic pulse wave velocity (PWV) is a strong predictor of CVD events. However, no previous study has examined the effect of SES on arterial stiffening over time. Th...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001057
更新日期:2016-10-01 00:00:00
abstract:OBJECTIVE:To test the hypothesis that cardiovascular reactivity to laboratory mental stressors interacts with job strain in predicting blood pressure at work. DESIGN:Ambulatory monitoring of blood pressure and heart rate was carried out for an 8-h period on a work day and on an equivalent non-work day in 49 male firef...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1995-02-01 00:00:00
abstract:INTRODUCTION:Several renal denervation (RDN) systems are currently under investigation for treatment of hypertension by ablation of renal sympathetic nerves. The procedural efficacy of devices, however, is variable and incompletely understood. This study aimed at investigating procedural and anatomical predictors of RD...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000001840
更新日期:2018-12-01 00:00:00
abstract:OBJECTIVE:We aimed to test whether eight common recently identified single-nucleotide polymorphisms (SNPs), strongly associated with blood pressure (BP) in the population, also have impact on the degree of BP reduction by antihypertensive agents with different mechanisms. METHODS:In 3863 Swedish hypertensive patients,...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3283536338
更新日期:2012-06-01 00:00:00
abstract:OBJECTIVE:Intermedin (IMD), a novel member of the calcitonin/calcitonin gene-related peptide family, is involved in maintaining circulatory homeostasis and is a protective factor of heart and vessel. Here, we investigated the effects of IMD on cardiac hypertrophy in vivo and in vitro and explored the mechanisms involve...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000000597
更新日期:2015-08-01 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:OBJECTIVE:Hypertension is a leading global risk factor for the burden of cardiovascular disease. Data about changes in hypertension control are important to set intervention priorities. We conducted a systematic review and meta-analysis of epidemiological studies to determine the control of hypertension in Spain over t...
journal_title:Journal of hypertension
pub_type: 杂志文章,meta分析,评审
doi:10.1097/HJH.0b013e32834d30ec
更新日期:2012-01-01 00:00:00
abstract:OBJECTIVE AND METHODS:The vasoactive properties of P1,P4-diadenosine tetraphosphate (Ap4A) were studied by measuring the effects of perfusion pressure of a rat isolated perfused kidney. RESULTS:The vasoconstrictive response to Ap4A was mediated to a large extent to a P2X receptor which could be shown by inhibition wit...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199816121-00013
更新日期:1998-12-01 00:00:00
abstract:OBJECTIVE:Although an exaggerated systolic blood pressure (SBP) response to exercise is a predictor of future hypertension and cardiovascular mortality, the underlying mechanisms are not fully understood. We tested the hypothesis that an exaggerated SBP response is associated with carotid atherosclerosis in a cross-sec...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000222758.54111.e2
更新日期:2006-05-01 00:00:00
abstract:OBJECTIVE:To investigate cardiomyocyte hypertrophy and hormonal profile in cardiac hypertrophy resulting from sequentially applied overloads. METHODS:We studied Sprague-Dawley rats with renovascular hypertension (RV), where pressure overload predominates, or deoxycorticosterone acetate (DOCA)-salt (DS), where volume o...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282435b1e
更新日期:2007-09-01 00:00:00
abstract:INTRODUCTION:Recent randomized controlled trials have confirmed the ability of renal denervation to lower blood pressure (BP) in patients, resistant to the BP-lowering effect of multiple antihypertensive drug administration. Evidence is limited, however, in patients with end-stage renal disease (ESRD) and haemodialysis...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002358
更新日期:2020-05-01 00:00:00
abstract:OBJECTIVES:To investigate whether glucose or insulin is the cause of increases in oxidative stress and blood pressure in insulin-resistant animals, and to evaluate the effects of alpha-lipoic acid (LA) on the production of the superoxide anion (O2-) in the aorta and blood pressure elevations in various models of diabet...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/01.hjh.0000160215.78973.ba
更新日期:2005-03-01 00:00:00
abstract:OBJECTIVE:Although several studies have reported an association between microalbuminuria and pulse wave velocity in patients with hypertension or diabetes, there have been no reports of their significance in apparently healthy individuals. METHODS:Microalbuminuria and brachial-ankle PWV (baPWV) were investigated in a ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e32834b5627
更新日期:2011-11-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to define the relationship between physical activity and the magnitude of the percentage fall in blood pressure at night (nocturnal dip). METHODS:We simultaneously monitored 24-h ambulatory blood pressure and measured physical activity by actigraphy in 434 patients. Blood pressure w...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200018040-00008
更新日期:2000-04-01 00:00:00
abstract:OBJECTIVES:The global morbidity and mortality related to hypertension and associated disorders increases continuously and novel therapeutic strategies are still in high demand. Increasing evidence suggests the important role in blood pressure regulation of cytochrome P-450-dependent metabolites of arachidonic acid. Epo...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0000000000002462
更新日期:2020-09-01 00:00:00
abstract:OBJECTIVES:It is well known that among hypertensive patients, an increased left ventricular mass (LVM) is a powerful predictor of cardiovascular morbidity and mortality. However, the mechanisms underlying LVM in hypertension are not completely understood, as the absolute value of blood pressure and other risk factors a...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3283581f7e
更新日期:2012-11-01 00:00:00
abstract:BACKGROUND:Ambulatory blood pressure (BP) monitoring (ABPM) detects subjects with normal clinic but high ambulatory 24-h BP, that is, masked hypertension. METHODS:One hundred and thirty newly diagnosed obstructive sleep apnea syndrome (OSAS) patients, free of recognized cardiovascular disease were included (111 men, a...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282f55049
更新日期:2008-05-01 00:00:00
abstract::Recent investigations have delineated the renal microvascular responsiveness to pressure, by using isolated afferent arterioles, juxtamedullary nephrons, and isolated perfused hydronephrotic kidneys. Both afferent arterioles and interlobular arteries (ILA) manifest pressure-dependent vasoconstrictor responses to eleva...
journal_title:Journal of hypertension
pub_type: 杂志文章,评审
doi:10.1097/00004872-199612000-00002
更新日期:1996-12-01 00:00:00
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journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200201000-00013
更新日期:2002-01-01 00:00:00
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journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1992-09-01 00:00:00
abstract:OBJECTIVE:The aim of the present study was to examine the reproducibility of arterial baroreflex sensitivity (BRS) provided by the spontaneous baroreflex method at rest and during laboratory tests. METHODS:Twenty healthy volunteers were studied 24 h apart, in the same laboratory and under the same environmental condit...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-199609000-00009
更新日期:1996-09-01 00:00:00
abstract::: The aim of the current article is to review the current evidence on the role of morning blood pressure (BP) in the management of hypertension. Morning BP surge had been and will continue to be a hot topic of hypertension research. However, more evidence is needed to prove its clinical usefulness in the management of...
journal_title:Journal of hypertension
pub_type: 杂志文章,评审
doi:10.1097/HJH.0000000000001379
更新日期:2017-08-01 00:00:00
abstract:OBJECTIVES:To investigate the influence of angiotensin II (All) receptors in isolated hepatic nuclei on other genes regulated by All and to determine whether the function of these intracellular receptors is influenced by alterations in the endocrine renin system. METHODS:Nuclei were isolated from hepatic tissue of nor...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1996-08-01 00:00:00
abstract:OBJECTIVE:To compare retinal arterial bifurcation geometry in normotensive and hypertensive subjects. DESIGN:A retrospective observational study. METHODS:Fluorescein angiograms of normotensive (n = 13) and hypertensive (n = 12) subjects aged 30-80 years with uni-ocular retinal pathology were compared. Quantification ...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:
更新日期:1995-12-01 00:00:00
abstract:OBJECTIVES:To evaluate the clinic and ambulatory blood pressure (BP)-lowering efficacy and safety of an aliskiren/amlodipine/hydrochlorothiazide (HCT) triple combination compared with the component dual combinations, in patients with moderate-to-severe hypertension. METHODS:This 8-week, double-blind, randomized, activ...
journal_title:Journal of hypertension
pub_type: 杂志文章,随机对照试验
doi:10.1097/HJH.0b013e328356b8ea
更新日期:2012-10-01 00:00:00
abstract:OBJECTIVE:The pathogenesis of nonalcoholic fatty liver disease (NAFLD) is multifactorial, and the presence of insulin resistance is recognized as the pathophysiological hallmark of this condition. Arterial hypertension is referred as an insulin-resistant state, and insulin resistance may substantially contribute to the...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e32830dfe4b
更新日期:2008-11-01 00:00:00
abstract:OBJECTIVE:The main objective was to examine the role of hemodynamics in rat aortic and left ventricular hypertrophy produced by sinoaortic denervation (SAD). DESIGN AND METHODS:Rats were examined at different times after SAD or sham operation (Sham). Hemodynamics were recorded continuously in conscious unrestrained ra...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/00004872-200209000-00033
更新日期:2002-09-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to estimate the prevalence and risk factors of prehypertension (Pre-HTN) and hypertension (HTN) among the adult population of Iran. METHODS:A nationwide cross-sectional survey was conducted from December 2004 to February 2005. The selection was conducted by stratified probability cl...
journal_title:Journal of hypertension
pub_type: 杂志文章
doi:10.1097/HJH.0b013e3282f2d34d
更新日期:2008-03-01 00:00:00