Abstract:
:The influence of experimental diabetes on the endothelium mediated relaxation and contractile responses of canine isolated coronary arteries was studied in arteries removed from alloxan treated diabetic (280 mmol.kg-1) and control mongrel dogs. Strips with and without endothelium were suspended in Krebs bicarbonate solution for isometric recording. Relaxation responses to acetylcholine (1.8 X 10(-8) to 9.4 X 10(-6) mol.litre-1, A23187 (10(-8) to 1.28 X 10(-6) mol.litre-1), and sodium nitroprusside (10(-9) to 10(-7) mol.litre-1) as well as contractile responses to prostaglandin F2 alpha, (1.7 X 10(-7) to 5.6 X 10(-4) mol.litre-1) were determined. In all intact strips acetylcholine, and A23187 induced similar concentration dependent reduction of the prostaglandin F2 alpha (2 X 10(-6) mol.litre-1) evoked tone. No significant difference was observed between sodium nitroprusside evoked relaxations of normal and diabetic arteries. Cyclooxygenase blockade reduced the maximal relaxations induced by acetylcholine and A23187 in diabetic vessels, whereas it did not change the endothelium dependent relaxation of normal arteries. Diabetes increased significantly the sensitivity to acetylcholine (EC50 4.1(0.4) X 10(-7) mol.litre-1 in control and 6(0.7) X 10(-8) mol.litre-1 in diabetic arteries; p less than 0.01, n = 7) and to A23187 (EC50: 7(1) X 10(-8) mol.litre-1 in control and 3.8(0.3) X 10(-8) mol.litre-1 in diabetic vessels; p less than 0.01, n = 7); in contrast, prostaglandin F2 alpha remained an equiactive constrictor in normal and diabetic vessels with intact endothelium.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Cardiovasc Resjournal_title
Cardiovascular researchauthors
Gebremedhin D,Koltai MZ,Pogátsa G,Magyar K,Hadházy Pdoi
10.1093/cvr/22.8.537subject
Has Abstractpub_date
1988-08-01 00:00:00pages
537-44issue
8eissn
0008-6363issn
1755-3245journal_volume
22pub_type
杂志文章abstract:OBJECTIVE:Diastolic dysfunction is a characteristic finding of the aged mammalian heart. Parvalbumin acts as a Ca2+ sink and enhances relaxation in skeletal muscle, and overexpression of parvalbumin in myocardium increased cardiac relaxation in vitro as well as in vivo. Therefore, the objective of this study is to test...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2004.06.028
更新日期:2005-05-01 00:00:00
abstract:AIMS:A blood pressure-independent metabolic shift toward a catabolic state upon high sodium (Na+) diet, ultimately favouring body fluid preservation, has recently been described in pre-clinical controlled settings. We sought to investigate the real-life impact of high Na+ intake on measures of renal Na+/water handling ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvaa205
更新日期:2020-07-16 00:00:00
abstract:AIM:Age and injury cause structural and functional changes in coronary artery smooth muscle cells (caSMCs) that influence the pathogenesis of coronary artery disease. Although paracrine signalling is widely believed to drive phenotypic changes in caSMCs, here we show that developmental origin within the fetal epicardiu...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvv167
更新日期:2015-07-15 00:00:00
abstract:AIMS:Imbalance between pro- and antioxidant species (e.g. during aging) plays a crucial role for vascular function and is associated with oxidative gene regulation and modification. Vascular aging is associated with progressive deterioration of vascular homeostasis leading to reduced relaxation, hypertrophy, and a high...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvn182
更新日期:2008-11-01 00:00:00
abstract:BACKGROUND:The atrial natriuretic peptide (ANP) family is a complex system consisting of at least three polypeptides and at least three types of receptor. Each peptide interacts with different types of receptor at varying degrees of affinity. To determine if natriuretic peptide levels influence natriuretic peptide rece...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(00)00038-9
更新日期:2000-06-01 00:00:00
abstract:OBJECTIVE:The aim was to evaluate the hypothesis that the oxygen demand of stimulated myocardium is downregulated and ischaemia avoided when oxygen supply is limited. METHODS:Isoprenaline stimulation during reduced coronary perfusion pressure or moderate coronary hypoxaemia was studied in relation to myocardial oxygen...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/27.8.1542
更新日期:1993-08-01 00:00:00
abstract:AIMS:To describe the overall role of reduced sarcoplasmic reticulum Ca(2+) ATPase (SERCA2) for Ca(2+) wave development. METHODS AND RESULTS:SERCA2 knockout [Serca2(flox/flox) Tg(alphaMHC-MerCreMer); KO] mice allowing inducible cardiomyocyte-specific disruption of the Serca2 gene in adult mice were compared with Serca(...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvp401
更新日期:2010-04-01 00:00:00
abstract::Coronary microvascular dysfunction (CMD) is commonly present in patients with metabolic derangements and is increasingly recognized as an important contributor to myocardial ischaemia, both in the presence and absence of epicardial coronary atherosclerosis. The latter condition is termed 'ischaemia and no obstructive ...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1093/cvr/cvaa002
更新日期:2020-03-01 00:00:00
abstract::The velocity of contraction has been reported to be more rapid in left atrium (LA) than left ventricle (LV), but the mechanics of contraction in these two chambers have not been compared under physiological conditions. Accordingly, sonomicrometer crystals and solid state pressure transducers were used to measure LV an...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/18.10.604
更新日期:1984-10-01 00:00:00
abstract:OBJECTIVE:The mechanosensitive nonselective cation channel (NSC(MS)) and endothelin-1 (ET-1) play critical roles in the regulation of vascular tone. This study was undertaken to investigate the effect of ET-1 on NSC(MS) and on the myogenic response of arteries. METHODS:Cell-attached patch-clamp techniques were applied...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2007.06.021
更新日期:2007-11-01 00:00:00
abstract::The role of the mitochondrial ATP-sensitive potassium channel (mK(ATP)) in ischemic preconditioning and cardioprotection is reviewed. A great deal of accumulated evidence implicatese opening of this channel as an important step in the anti-infarct effect of ischemic preconditioning. Recent studies, however, reveal tha...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1016/s0008-6363(02)00439-x
更新日期:2002-08-15 00:00:00
abstract:Aims:β1-adrenergic receptor autoantibodies (β1-AAs) and β2-adrenergic receptor autoantibodies (β2-AAs) are present in patients with heart failure (HF); however, their interrelationship with cardiac structure and function remains unknown. This study explored the effects of the imbalance between β1-AAs and β2-AAs on card...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvy105
更新日期:2018-09-01 00:00:00
abstract:OBJECTIVE:Acute ischemia comes with two phases of life-threatening arrhythmias, early (within 10 minutes, 1A) and late (after about 15 minutes, 1B). The mechanism of the latter is unknown and in this paper, we test the hypothesis that a phase of intermediate coupling between surviving epicardium and inexcitable midmyoc...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(01)00222-x
更新日期:2001-05-01 00:00:00
abstract::Zero drift may be a cause of imprecision when micromanometer tipped catheters are used for intravascular pressure measurement over long periods of time. Drift of only a few mm Hg may represent a significant error when accurate recording of low vascular pressures is required. To overcome this problem a micromanometer t...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/23.2.152
更新日期:1989-02-01 00:00:00
abstract:Aims:Hypertensive cardiac hypertrophy is associated with reduced coronary flow reserve, but its impact on coronary flow regulation and vasomotor function remains incompletely understood and requires further investigation. Methods and results:Left ventricular hypertrophy was induced in mice by transverse aortic coarcta...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvx103
更新日期:2017-09-01 00:00:00
abstract:OBJECTIVE:Mice with genetic disruption of the guanylyl cyclase-A (GC-A) receptor for atrial natriuretic peptide (ANP), have chronic arterial hypertension and marked cardiac hypertrophy. Intriguingly, despite pronounced remodeling, cardiac contractile functions and cardiomyocyte Ca(2+)-handling are preserved and even en...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2006.10.003
更新日期:2007-03-01 00:00:00
abstract:AIMS:Hypercholesterolaemia and myeloperoxidase (MPO) overexpression are two well-recognized risk factors for ischaemic heart disease. Peroxisome proliferator-activated receptor-gamma (PPARgamma) agonists have recently been shown to reduce ischaemic heart injury in hypercholesterolaemic animals. However, whether PPARgam...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvn308
更新日期:2009-02-01 00:00:00
abstract:OBJECTIVE:The aim was to clarify the site in the coronary microcirculation that is dilated by an ATP sensitive potassium channel opener, levcromakalim, and to examine whether the magnitude of dilatation is size dependent. METHODS:Coronary arterial microvessels were observed through an intravital microscope equipped wi...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/28.12.1780
更新日期:1994-12-01 00:00:00
abstract:OBJECTIVE:Neointimal hyperplasia is a central feature in the pathogenesis of a variety of vascular pathologies. Mitogen-activated protein kinases (MAPK) are involved in the downstream transduction of signals from receptors for many of the molecules known to be instrumental in this process and thus represent a potential...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(02)00335-8
更新日期:2002-06-01 00:00:00
abstract::The cellular and molecular physiology and pathology of insulin-dependent diabetes mellitus (IDDM) and non-insulin-dependent diabetes mellitus (NIDDM) are mostly studied and understood through the use of animal models. Fundamental differences between the IDDM and NIDDM animal models may help to explain the etiology beh...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1016/s0008-6363(00)00025-0
更新日期:2000-06-01 00:00:00
abstract::Myocardial function, flow and O2 consumption were compared in cardiac hypertrophy induced by pressure-loading (P) and by volume overloading (V). Increases in LV-to-body weight ratios in P and V hypertrophied hearts were comparable. Indices of LV function such as cardiac output, stroke volume, stroke work, minute work,...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/11.4.310
更新日期:1977-07-01 00:00:00
abstract::The G protein-coupled receptor kinases (GRKs) participate with arrestins in the regulation and signal propagation of multiple G protein-coupled receptors (GPCR) of key physiological and pharmacological relevance in the cardiovascular system. The complex mechanisms of regulation of GRK expression, degradation and funct...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1016/j.cardiores.2005.09.011
更新日期:2006-01-01 00:00:00
abstract:OBJECTIVE:Polymorphic ventricular tachycardias (PVT) occur spontaneously in canine hearts under the combination of D-sotalol (S), bradycardia and phenylephrine (PE). We investigated the hypotheses that: (1) the activation patterns of the initial PVT beats would be consistent with an origin in the ventricular conduction...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(98)00036-4
更新日期:1998-06-01 00:00:00
abstract::The structural nature of fibrillar collagen involved in the replacement fibrosis which accompanies discrete areas of cell necrosis remains uncertain, as does its influence on the diastolic and systolic stiffness of the intact myocardium. This study, using 15 micron diameter microsphere embolisation of the rat myocardi...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/23.8.655
更新日期:1989-08-01 00:00:00
abstract:AIMS:Cytotoxic T lymphocyte antigen 4 (CTLA4) exerts inhibitory effects on T-cell activation by competition with CD28. In this study, we investigated the effect of CTLA4-IgG on homocysteine (Hcy)-induced T-cell activation and potential signal pathways involved in atherosclerotic formation. METHODS AND RESULTS:The CD28...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvs330
更新日期:2013-02-01 00:00:00
abstract::Following a myocardial infarction (MI), the immune system helps to repair ischaemic damage and restore tissue integrity, but excessive inflammation has been implicated in adverse cardiac remodelling and development towards heart failure (HF). Pre-clinical studies suggest that timely resolution of inflammation may help...
journal_title:Cardiovascular research
pub_type: 杂志文章,meta分析
doi:10.1093/cvr/cvy145
更新日期:2018-09-01 00:00:00
abstract::In order to evaluate clinically recorded jugular vein pulses it is necessary to understand the transmission process of the right atrial pressure pulse through the caval veins up to the jugular veins. The transmission speed at distinct points of the venous pressure curve was studied in the superior vena cava of 20 anae...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/17.10.627
更新日期:1983-10-01 00:00:00
abstract::Methodology has been developed for utilising ultrasonic crystals in closed chest cats to measure alterations in regional left ventricular function. The technique is a modification of one previously utilised to monitor regional left ventricular length and thickness changes in closed chest dogs. The ultrasonic crystals ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/12.6.387
更新日期:1978-06-01 00:00:00
abstract:AIMS:Atrial fibrillation (AF) is a progressive cardiac arrhythmia that increases the risk of hospitalization and adverse cardiovascular events. There is a clear demand for more inclusive and large-scale approaches to understand the molecular drivers responsible for AF, as well as the fundamental mechanisms governing th...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvaa307
更新日期:2020-10-29 00:00:00
abstract:OBJECTIVE:The acute administration of growth hormone (GH) or insulin-like growth factor-1 (IGF-1) improves cardiac performance, possibly contributing to the beneficial effects of GH therapy on heart failure (HF). GH can induce the production of IGF-1 and thus the actions of GH may be mediated through its IGF-1 inductio...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(99)00058-9
更新日期:1999-07-01 00:00:00