Abstract:
BACKGROUND:Angiotensin II (Ang II) plays a critical role in the development of vascular lesions in hypertension, atherosclerosis, and several renal diseases. Because Ang II may contribute to the leukocyte recruitment associated with these pathological states, the aim of the present study was to assess the role of Ang II in leukocyte-endothelial cell interactions in vivo. METHODS AND RESULTS:Intravital microscopy of the rat mesenteric postcapillary venules was used. Sixty minutes of superfusion with 1 nmol/L Ang II induced a significant increase in leukocyte rolling flux (83.8+/-20. 7 versus 16.4+/-3.1 cells/min), adhesion (11.4+/-1.0 versus 0.8+/-0. 5 cells/100 microm), and emigration (4.0+/-0.7 versus 0.2+/-0.2 cells/field) without any vasoconstrictor activity. These effects were not mediated by mast cell activation. Intravenous pretreatment with AT(1) (losartan) or AT(2) (PD123,319) receptor antagonists significantly reduced Ang II-induced responses. A combination of both receptor antagonists inhibited the leukocyte rolling flux, adhesion, and extravasation elicited by Ang II at 60 minutes. Pretreatment of animals with fucoidin or an adhesion-blocking anti-rat P-selectin monoclonal antibody abolished Ang II-induced leukocyte responses. Furthermore, rat platelet P-selectin expression was not affected by Ang II stimulation. CONCLUSIONS:-Ang II induces significant leukocyte rolling, adhesion, and emigration, which may contribute not only to hypertension but also to the onset and progression of the vascular damage associated with disease states in which plasma levels of this peptide are elevated.
journal_name
Circulationjournal_title
Circulationauthors
Piqueras L,Kubes P,Alvarez A,O'Connor E,Issekutz AC,Esplugues JV,Sanz MJdoi
10.1161/01.cir.102.17.2118subject
Has Abstractpub_date
2000-10-24 00:00:00pages
2118-23issue
17eissn
0009-7322issn
1524-4539journal_volume
102pub_type
杂志文章相关文献
CIRCULATION文献大全abstract::Advances in cardiovascular medicine fueled by innovative clinical trials have dramatically improved the lives of patients worldwide. Commensurate with this progress has been a decline in morbid and mortal events. Accordingly, an increased propensity to collate patient outcomes in clinical trials has emerged that combi...
journal_title:Circulation
pub_type: 杂志文章,评审
doi:10.1161/CIRCULATIONAHA.117.026229
更新日期:2017-06-06 00:00:00
abstract:BACKGROUND:Q waves on a 12-lead ECG are markers of a prior myocardial infarction (MI). However, they may regress or even disappear over time, and there is no specific ECG sign of a non-Q-wave MI. Fragmented QRS complexes (fQRSs), which include various RSR' patterns, without a typical bundle-branch block are markers of ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.105.595892
更新日期:2006-05-30 00:00:00
abstract:BACKGROUND:Interleukin (IL)-6-related cytokines share gp130 as the signal-transducing protein. Downstream of gp130, two signal-transducing pathways have been recognized, the Janus kinase-signal transducer and activator of transcription (JAK-STAT) pathway and the Ras-mitogen-activated protein kinase (MAPK) pathway. To d...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.94.10.2626
更新日期:1996-11-15 00:00:00
abstract:BACKGROUND:The synthetic catecholamine dobutamine increases stroke volume in normal subjects and in patients with congestive heart failure. In addition to its direct influence on myocardial contractility, dobutamine may significantly modulate vascular tone because of its alpha- and beta-adrenergic agonist activity. ME...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.84.3.1210
更新日期:1991-09-01 00:00:00
abstract::The myocardial uptake of 125I- and 131I-antimyosin monoclonal antibody Fab in experimental myocarditis in BALB/c mice induced by encephalomyocarditis virus was studied. The biodistribution of 125I-antimyosin demonstrated that the highest ratio of radioactivity appears in the heart of infected mice on day 14 (the ratio...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.79.2.400
更新日期:1989-02-01 00:00:00
abstract:BACKGROUND:Prospective data relating previous exposure to cytomegalovirus (CMV) to the risk of cardiac mortality are controversial. We investigated the effect of previous exposure to CMV infection on the risk of future cardiac disease-related death in relation to an underlying inflammatory response. METHODS AND RESULT...
journal_title:Circulation
pub_type: 临床试验,杂志文章
doi:10.1161/01.cir.103.24.2915
更新日期:2001-06-19 00:00:00
abstract:BACKGROUND:Patients with acute ischemic right ventricular dysfunction often develop hemodynamic compromise, yet most manifest spontaneous early clinical improvement and later recovery of global right ventricular performance. This study was designed to delineate the determinants of right ventricular performance followin...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.88.2.696
更新日期:1993-08-01 00:00:00
abstract:BACKGROUND:Performance of coronary artery bypass graft (CABG) during an acute coronary syndrome (ACS) is mainly used in high-risk patients. Although potentially life-saving, patients undergoing early CABG are traditionally associated with a worse outcome than those not requiring CABG. Is this really true in an unselect...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.105.001420
更新日期:2006-07-04 00:00:00
abstract:BACKGROUND:Alterations in the balance of matrix metalloproteinases (MMPs) and their specific tissue inhibitors (TIMPs) are involved in left ventricular (LV) remodeling. Whether their expression is related to interstitial fibrosis or LV dysfunction in patients with chronic pressure overload-induced LV hypertrophy, howev...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.104.516963
更新日期:2005-08-23 00:00:00
abstract::The linearity and sensitivity of the end-systolic pressure-volume (P-Ves) relation to the inotropic state of the left ventricle were investigated in 11 patients with coronary heart disease and one patient with congestive cardiomyopathy. To minimize autonomic reflex responses, propranolol, 0.15 mg/kg, and atropine, 1 m...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.63.6.1216
更新日期:1981-06-01 00:00:00
abstract::Early afterdepolarizations (EADs) are depolarizing potentials that occur before complete repolarization. They may be important in the acquired and possibly the idiopathic long QT syndrome and associated ventricular tachycardia (VT). The purpose of these experiments was to study in 20 open-chest dogs the effects of sym...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.78.5.1241
更新日期:1988-11-01 00:00:00
abstract::The effect of bretylium tosylate (BT) was determined in 27 consecutive cases of resistant ventricular fibrillation (VF) encountered by a hospital cardiac arrest team. The VF was sustained and completely resistant to multiple injections of lidocaine, sequential DC shocks at 400 watt-sec and one or a combination of intr...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.55.3.541
更新日期:1977-03-01 00:00:00
abstract:BACKGROUND:Cardiovascular disease (CVD) is the leading cause of death in the United States and is responsible for 17% of national health expenditures. As the population ages, these costs are expected to increase substantially. METHODS AND RESULTS:To prepare for future cardiovascular care needs, the American Heart Asso...
journal_title:Circulation
pub_type: 共识发展会议,杂志文章
doi:10.1161/CIR.0b013e31820a55f5
更新日期:2011-03-01 00:00:00
abstract:BACKGROUND:Mechanisms by which neutrophils are attracted to the myocardium in ischemia/reperfusion are not fully defined. Lipopolysaccharide-induced CXC chemokine (LIX), cytokine-induced neutrophil chemoattractant (KC), and macrophage inflammatory protein-2 (MIP-2) are rodent chemokines with potent neutrophil-chemotact...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.103.18.2296
更新日期:2001-05-08 00:00:00
abstract:BACKGROUND:Platelet-thrombus formation is a complication of arterial wall deep injury by balloon angioplasty that may lead to acute arterial occlusion and may contribute to restenosis. METHODS AND RESULTS:Because common platelet-inhibitor drugs with a heparin bolus (100 units/kg) may be effective in inhibiting platele...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.84.2.814
更新日期:1991-08-01 00:00:00
abstract::Two-dimensional suprasternal notch echocardiography was performed in 1033 patients, ages 1 day to 18 years. For the long-axis suprasternal notch view, the transducer was positioned in the suprasternal notch and angled to obtain a plane passing between the right nipple and left scapular tip. In this view, the entire ao...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.63.1.165
更新日期:1981-01-01 00:00:00
abstract:BACKGROUND:Thrombolytic therapy of acute myocardial infarction (AMI) is evolving toward bolus administration. Derivatization of proteins with polyethylene glycol (PEG) may reduce their clearance. METHODS AND RESULTS:A staphylokinase (SakSTAR) variant with 12 amino acid substitutions to reduce its antigenicity, SakSTAR...
journal_title:Circulation
pub_type: 临床试验,杂志文章
doi:10.1161/01.cir.102.15.1766
更新日期:2000-10-10 00:00:00
abstract:BACKGROUND:The use of balloon coarctation angioplasty instead of surgery as treatment for unoperated coarctation of the aorta is controversial. The efficacy and complications of the two procedures have not been studied before in a prospective fashion. METHODS AND RESULTS:Thirty-six patients were prospectively randomiz...
journal_title:Circulation
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1161/01.cir.87.3.793
更新日期:1993-03-01 00:00:00
abstract:BACKGROUND:Cell-mediated autoimmunity has been strongly implicated in the pathogenesis of viral myocarditis. METHODS AND RESULTS:Using a murine model of acute myocarditis caused by coxsackievirus B3, we analyzed the phenotypes and morphology of the infiltrating cells in the hearts by immunofluorescence and electron mi...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.84.2.788
更新日期:1991-08-01 00:00:00
abstract:BACKGROUND:A role for myeloperoxidase (MPO) as a mediator of coronary artery disease and acute coronary syndromes has recently received considerable attention. Although active MPO and hypochlorite-modified proteins and peptides have been detected in human atherosclerotic lesions, detection of novel chlorinated oxidized...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.CIR.0000104564.01539.6A
更新日期:2003-12-23 00:00:00
abstract::Amiloride, a widely used diuretic, has multiple pharmacological actions, including inhibition of the sodium-hydronium ion and the sodium-calcium exchanger in heart. In terms of cardiac electrophysiology, amiloride prolongs action potential duration without alteration in upstroke velocity of phase 0 in Purkinje fibers....
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.78.6.1469
更新日期:1988-12-01 00:00:00
abstract:BACKGROUND:Sharing of patient-level clinical trial data has been widely endorsed. Little is known about how extensively these data have been used for cardiometabolic diseases. We sought to evaluate the availability and use of shared data from cardiometabolic clinical trials. METHODS:We extracted data from ClinicalStud...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.117.031883
更新日期:2018-02-27 00:00:00
abstract:BACKGROUND:The Na(+)/Ca(2+) exchange (NCX) extrudes Ca(2+) from cardiac myocytes, but it can also mediate Ca(2+) influx, load the sarcoplasmic reticulum with Ca(2+), and trigger Ca(2+) release from the sarcoplasmic reticulum. In ischemia/reperfusion or digitalis toxicity, increased levels of intracellular [Na(+)] ([Na(...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.101.12.1441
更新日期:2000-03-28 00:00:00
abstract:BACKGROUND:Second trimester routine ultrasound evaluation of the fetal heart by means of the four-chamber view has been proposed for prenatal detection of cardiac anomalies. The aim of this study was to evaluate the efficacy of this procedure. METHODS AND RESULTS:A prospective follow-up study on 6922 scanned fetuses w...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.94.1.67
更新日期:1996-07-01 00:00:00
abstract:BACKGROUND:Limited information exists on the intermediate-term graft patency and 5-year clinical outcomes of patients receiving saphenous vein grafts with multiple (m-SVG) versus single distal targets (s-SVG) during coronary artery bypass graft (CABG) surgery in the current era. METHODS AND RESULTS:We studied the asso...
journal_title:Circulation
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1161/CIRCULATIONAHA.110.991299
更新日期:2011-07-19 00:00:00
abstract:BACKGROUND:Glycoprotein (GP) IIb/IIIa inhibitors are beneficial in patients with non-ST-segment elevation acute coronary syndromes (NSTE ACS); their safe use in women, however, remains a concern. The contribution of dosing to the observed sex-related differences in bleeding is unknown. METHODS AND RESULTS:We explored ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.106.620815
更新日期:2006-09-26 00:00:00
abstract::Depression of myocardial conduction velocity can be an important mechanism of action of antiarrhythmic drugs but it can also facilitate arrhythmogenesis. We used lidocaine in an anesthetized canine preparation to address the hypothesis that drug-induced rate-dependent conduction velocity depression causes ventricular ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.81.3.1024
更新日期:1990-03-01 00:00:00
abstract:BACKGROUND:Despite a recent American Heart Association (AHA) consensus statement emphasizing the importance of resistant hypertension, the incidence and prognosis of this condition are largely unknown. METHODS AND RESULTS:This retrospective cohort study in 2 integrated health plans included patients with incident hype...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.111.068064
更新日期:2012-04-03 00:00:00
abstract:BACKGROUND:The prevalence, prognostic import, and impact of renal insufficiency on the benefits of ACE inhibitors and beta-blockers in community-dwelling patients with heart failure are uncertain. METHODS AND RESULTS:We analyzed data from a prospective cohort of 754 patients with heart failure who had ejection fractio...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.CIR.0000116764.53225.A9
更新日期:2004-03-02 00:00:00
abstract:BACKGROUND:The differentiation of hypertrophic cardiomyopathy (HCM) from hypertensive left ventricular hypertrophy (H-LVH) on the basis of morphological information obtained by conventional echocardiography is occasionally problematic. We investigated whether strain rate (SR) imaging derived from tissue Doppler imaging...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.CIR.0000150334.69355.00
更新日期:2004-12-21 00:00:00