Abstract:
BACKGROUND:Aging is a major risk factor for the development of arterial stiffness and vascular disease, and it is related to the upregulation of matrix metalloproteinase-2 (MMP-2) in the aorta of rats and nonhuman primates. This study aimed to determine whether MMP activity in the human vasculature changes with aging. We also assessed regional differences in MMP activity at two locations in the arterial tree, the aorta and the internal mammary artery (IMA). METHODS:Both MMP-2 and MMP-9 activity in the human aorta and IMA were determined by gelatin zymography and were localized within the tissue using in situ zymography. Tissue inhibitor of metalloproteinase-2 (TIMP-2) levels was determined by Western blot. RESULTS:Active MMP-2 (but not pro-MMP-2, pro-MMP-9, or active MMP-9) was positively correlated with age in the human aorta (r = 0.65; P < .001) but not in the IMA. Active MMP-2 and TIMP-2 (but not pro-MMP-2 or pro- or active MMP-9) levels are higher in the aorta than in the IMA (P < .001; P < .05). In the aorta, MMP activity is highest in the intima and is also detectable in the media and adventitia. To a lesser extent, MMP activity is present in all layers of the IMA. CONCLUSIONS:This study demonstrates that age-related MMP-2 upregulation occurs in the human aorta but not in the IMA.
journal_name
Am J Hypertensjournal_title
American journal of hypertensionauthors
McNulty M,Spiers P,McGovern E,Feely Jdoi
10.1016/j.amjhyper.2004.11.011subject
Has Abstractpub_date
2005-04-01 00:00:00pages
504-9issue
4 Pt 1eissn
0895-7061issn
1941-7225pii
S0895-7061(04)01150-1journal_volume
18pub_type
杂志文章abstract:BACKGROUND:Liddle syndrome (LS), an autosomal dominant disorder, is a common monogenic hypertension in pediatrics. In this study, we reported a novel SCNN1G variant in a Chinese family with pediatric LS, and conduct a systematic review of epithelial sodium channel (ENaC)-gene-positive LS cases to conclude the clinical ...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1093/ajh/hpaa037
更新日期:2020-07-18 00:00:00
abstract:BACKGROUND:Peripheral endothelial dysfunction has been demonstrated in hypertension. However, its relationship to blood pressure (BP) load, vascular structure, and metabolic disturbances in patients with long-standing, previously treated hypertension is unclear. METHODS:A total of 41 patients with stage I to III essen...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1016/s0895-7061(01)02148-3
更新日期:2001-09-01 00:00:00
abstract::Despite intense investigation and clinical attention, many challenges remain in the management of the hypertensive patient. It is clear that hypertension remains inadequately controlled worldwide, with the control rate in the United States approximating 27%. Furthermore, several recent studies have underscored that it...
journal_title:American journal of hypertension
pub_type: 杂志文章,评审
doi:10.1016/s0895-7061(02)02948-5
更新日期:2002-07-01 00:00:00
abstract::The aim of the present study was to assess the efficacy and tolerability of a calcium antagonist/beta-blocker fixed combination tablet used as first-line antihypertesnive therapy in comparison with an angiotensin converting enzyme inhibitor and placebo. Patients with uncomplicated essential hypertension (diastolic blo...
journal_title:American 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:10.1016/s0895-7061(99)00067-9
更新日期:1999-09-01 00:00:00
abstract:BACKGROUND:Type B acute aortic dissection (AAD) carries a high short- and midterm mortality rate; however, knowledge related to long-term outcome is largely incomplete. The objective of this study was to identify long-term predictors including antihypertensive medications in type B AAD. METHODS:We conducted a clinical...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1038/ajh.2009.5
更新日期:2009-04-01 00:00:00
abstract::Pneumonia is a major direct cause of death in the elderly. Although aspiration based on a reduced cough reflex is one of the causes of pneumonia in the elderly, there are few studies of angiotensin-I converting enzyme inhibitors (ACE inhibitors), which are antihypertensive drugs that induce cough, as a factor influenc...
journal_title:American journal of hypertension
pub_type: 临床试验,杂志文章
doi:10.1016/s0895-7061(99)00035-7
更新日期:1999-08-01 00:00:00
abstract:BACKGROUND:New onset resistant hypertension in a previously stable patient with chronic hypertension should lead to consideration of secondary causes. Electrolyte abnormalities are useful clues for identifying some common causes, especially mineralocorticoid excess. CASE PRESENTATION:We report the case of a 69-year-ol...
journal_title:American journal of hypertension
pub_type:
doi:10.1093/ajh/hpz125
更新日期:2019-11-15 00:00:00
abstract::There is considerable evidence that activation of the sympathetic nervous system plays an important role in the pathogenesis of several cardiovascular diseases, including hypertension. However, the mechanisms that account for sympathetic activation and the precise mechanisms that mediate neurally induced hypertension ...
journal_title:American journal of hypertension
pub_type: 杂志文章,评审
doi:10.1016/s0895-7061(01)02082-9
更新日期:2001-06-01 00:00:00
abstract::Barriers to high blood pressure (HBP) care and control have been reported in the literature for > 30 years. Few reports on barriers, however, have focused on the young black man with HBP, the age/sex/race group with the highest rates of early severe and complicated HBP and the lowest rates of awareness, treatment, and...
journal_title:American journal of hypertension
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/s0895-7061(99)00121-1
更新日期:1999-10-01 00:00:00
abstract:BACKGROUND:Recent studies have shown that hyperuricemia may be associated with incident hypertension (HTN). We examined whether serum uric acid (SUA) is a predictor of HTN and target organ damage (TOD) 20 years later in initially healthy middle-aged individuals. METHODS:Participants from the Suivi Temporaire Annuel No...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1093/ajh/hpaa030
更新日期:2020-09-10 00:00:00
abstract::A wide pulse pressure (PP) may constitute an independent predictor of cardiovascular morbidity and mortality. We assessed the reference values of brachial clinic PP, according to age and gender in a nonselected population (61,724 subjects) who were undergoing a routine systematic health examination. According to mean ...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1016/s0895-7061(01)01284-5
更新日期:2001-05-01 00:00:00
abstract:BACKGROUND:B-type natriuretic peptide (BNP) increases the risk of death and cardiovascular events in patients without heart failure, even at BNP values within the "normal" range. The reasons for this are unclear. METHODS:We performed two separate studies (n = 33 and n = 129) on subjects with type 2 diabetes mellitus i...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1016/j.amjhyper.2005.06.016
更新日期:2005-12-01 00:00:00
abstract::In many reports, the prevalence of target organ damage in renovascular hypertension (RVH) appears to be higher than in essential hypertension (EH). Since in most studies the renal artery stenosis is part of a diffuse atherosclerotic disease, it is not known whether these complications are due to RVH itself or to the v...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1016/0895-7061(96)00199-9
更新日期:1996-11-01 00:00:00
abstract::Angiotensin receptors became relatively easy to study when radioactive derivatives of the peptide were synthesized for radioimmunoassays. Binding assays in vitro led to the discovery of receptors in many tissues different from those involved in the classic actions of angiotensin. The physiologic significance of recept...
journal_title:American journal of hypertension
pub_type: 历史文章,杂志文章
doi:10.1016/s0895-7061(99)00212-5
更新日期:2000-04-01 00:00:00
abstract:BACKGROUND:Obesity is one of the main determinants of blood pressure. The aim of this study was to evaluate and quantify the relations between the different anthropometric indices and blood pressure (BP) stratified by gender. METHODS:Cross-sectional analyses were performed using data from 2,105 adults from the ESTEBAN...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1093/ajh/hpz096
更新日期:2019-09-24 00:00:00
abstract:BACKGROUND:Preeclampsia is a human pregnancy-associated syndrome associated with hypertension, proteinuria, and endothelial dysfunction. We tested whether increased reactive oxygen species (superoxide and peroxynitrite) production and decreased bioavailability of the endothelial nitric oxide (NO) synthase (eNOS) cofact...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1016/j.amjhyper.2007.08.007
更新日期:2007-12-01 00:00:00
abstract::There is controversy over whether endothelial function is impaired in human essential hypertension. All studies to date have used measurements of forearm blood flow by plethysmography to assess endothelium-dependent vasodilation and endothelial function. In contrast to these studies, which have focused on resistance v...
journal_title:American journal of hypertension
pub_type: 临床试验,杂志文章
doi:10.1016/s0895-7061(96)00414-1
更新日期:1997-03-01 00:00:00
abstract:BACKGROUND:Insulin inhibits contraction and migration of primary confluent, cultured canine vascular smooth muscle cells (VSMCs) with inducible nitric oxide synthase (iNOS) by stimulating cyclic GMP (cGMP) production. The present study was performed to determine how insulin stimulates guanylate cyclase activity in thes...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1016/s0895-7061(01)02289-0
更新日期:2002-03-01 00:00:00
abstract::Cocaine causes acute hypertension by blocking catecholamine reuptake. There is evidence that it also impairs the peripheral endothelial nitric oxide system, which is normally vasodilatory. We further explored the role of nitric oxide in cocaine-induced vasoconstriction in anesthetized rats, and in vitro by using isola...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1016/s0895-7061(98)00041-7
更新日期:1998-06-01 00:00:00
abstract:BACKGROUND:Blood pressure (BP) measured in the office setting increases from early through later adulthood. However, it is unknown to what extent out-of-office BP derived via ambulatory BP monitoring (ABPM) increases over time, and which participant characteristics and risk factors might contribute to these increases. ...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1093/ajh/hpaa189
更新日期:2020-11-17 00:00:00
abstract::This study examined the effects of alterations in salt-intake on blood pressure (BP) in rats chronically treated intravenously with or without the nitric oxide synthase (NOS) inhibitor N(G)-nitro-L-arginine methyl ester (L-NAME) (8.6 mg/kg/day). The changes in mean arterial pressure (MAP), the renal cortical and medul...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1016/s0895-7061(01)02267-1
更新日期:2002-02-01 00:00:00
abstract:BACKGROUND:Noninvasive applanation tonometry (APT) is useful to assess aortic stiffness and pulse wave reflection. Moreover, APT can predict outcome in many conditions such as arterial hypertension. In this study, we test whether APT measurements relate to progression of aortic disease in Marfan syndrome (MFS). METHOD...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1038/ajh.2009.115
更新日期:2009-09-01 00:00:00
abstract::Cicletanine sulfate was tested on bicarbonate-dependent pHi changes in cultured vascular smooth muscle (A10 line). Cicletanine sulfate exhibited double reactivity with regard to the cell alkalinization induced by bicarbonate uptake. The analysis of 11 concentration-response curves revealed a high reactivity component ...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1093/ajh/6.8.674
更新日期:1993-08-01 00:00:00
abstract:BACKGROUND:We reported that insulin modestly stimulates NAD(P)H oxidase activity in cultured rat vascular smooth muscle cells (VSMC) and synergistically stimulates enzyme activity with angiotensin II (Ang II), leading to synergistic stimulation of VSMC migration. The aim of this study was to determine the mechanism of ...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1016/j.amjhyper.2005.11.017
更新日期:2006-06-01 00:00:00
abstract::Hypertension is a common condition that is often seen in patients with diabetes. Both diseases increase the risk of morbidity and mortality from CV events and kidney disease progression. Factors that influence blood pressure (BP) control in diabetes include the persons' genetic background for hypertension and kidney d...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1093/ajh/hpaa067
更新日期:2020-10-21 00:00:00
abstract::The goal of this study was to investigate the activity of the Na+/H+ exchanger in erythrocytes of patients with essential hypertension and its relation with urinary Na+ excretion. The study was performed in cells from 27 untreated hypertensive patients and 30 normotensive controls with similar age and sex distribution...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1016/0895-7061(94)00172-8
更新日期:1995-02-01 00:00:00
abstract:BACKGROUND:Feeding stroke-prone spontaneously hypertensive rats (SHRSP) a diet rich in fructose results in a profound glucose intolerance not observed in the normotensive Wistar Kyoto (WKY) strain. The aim of this study was to investigate the role of the liver in the underlying mechanisms in the SHRSP. METHODS:SHRSP a...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1038/ajh.2008.41
更新日期:2008-06-01 00:00:00
abstract:BACKGROUND:Left atrial (LA) dilatation is associated with unfavorable outcome in hypertension. However, there are few data on clinical, demographic, and echocardiographic findings correlated with LA dilatation development. METHODS:From the Campania-Salute Network registry, we identified 5,375 hypertensive patients (52...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1093/ajh/hpw043
更新日期:2016-09-01 00:00:00
abstract::The purpose of this study was to investigate whether acute hyperinsulinemia induces selective hemodynamic effects in the mesenteric, renal, and iliac vascular beds, and to determine whether nitric oxide (NO) plays a role in the regulation of blood flow and mean arterial pressure (MAP) during acute hyperinsulinism. In ...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1016/s0895-7061(98)00133-2
更新日期:1998-10-01 00:00:00
abstract:BACKGROUND:Genetic factors may influence blood pressure (BP) responses to dietary potassium intake. We examined the association of genetic variants in the apelin-APJ system and angiotensin-converting enzyme 2 (ACE2) with BP responses to potassium supplementation. METHODS:We conducted a 7-day potassium supplementation ...
journal_title:American journal of hypertension
pub_type: 杂志文章
doi:10.1038/ajh.2010.36
更新日期:2010-06-01 00:00:00