Abstract:
OBJECTIVE:The present work is aimed at elucidating the signalling pathway(s) triggered by activation of A(2A) receptors involved in the facilitation of noradrenaline release in rat tail artery as an attempt to clarify their role in the cardiovascular system. METHODS:Electrically evoked (5 Hz, 100 pulses, 1 ms) tritium overflow was evaluated in preparations of rat tail artery, pre-incubated with [(3)H]-noradrenaline (0.1 microM), in the absence or in the presence of adenosine receptor agonists and antagonists and/or activators and inhibitors of phospholipase C (PLC)-protein kinase C (PKC) and of adenylate cyclase (AC)-cyclic adenosine-3',5'-monophosphate (cAMP)-protein kinase A (PKA) pathways. RESULTS:Activation of A(2A) receptors by 2-p-(2-carboxyethyl)phenethylamino-5'-N-ethylcarboxamidoadenosine (CGS 21680; 100 nM) enhanced tritium overflow, an effect prevented by the A(2A) receptor antagonist 5-amino-7-(2-phenylethyl)-2-(2-furyl)-pyrazolo-[4,3]-1,2,4-triazolo[1,5]pyrimidine (SCH 58261; 20 nM), by the protein kinase A (PKA) inhibitor N-(2-[p-bromocinnamylamino]ethyl)-5-isoquinolinesulfonamide (H-89; 1 microM), or the PKC inhibitor 2-(8-[(dimethylamino)methyl-6,7,8,9-tetrahydropyrido[1,2]indol-3-yl]-3-(1-methylindol-3-yl)maleimide (Ro 32-0432; 1 microM). The PKC activator phorbol 12-myristate 13-acetate (PMA; 1 microM) and the PKA activator 8-bromo-cAMP (0.5 mM) also enhanced tritium overflow. The effect caused by PMA was blunted both by Ro 32-0432 and by H-89 whereas that caused by 8-bromo-cAMP was only prevented by H-89. CONCLUSIONS:In rat tail artery, the A(2A) receptor-mediated facilitation of noradrenaline release requires activation of both PKC and PKA, and PKA activation seems to occur downstream of PKC activation.
journal_name
Cardiovasc Resjournal_title
Cardiovascular researchauthors
Fresco P,Diniz C,Gonçalves Jdoi
10.1016/j.cardiores.2004.05.015subject
Has Abstractpub_date
2004-09-01 00:00:00pages
739-46issue
4eissn
0008-6363issn
1755-3245pii
S0008636304002378journal_volume
63pub_type
杂志文章abstract::The central role of vascular endothelial growth factor (VEGF) in angiogenesis in health and disease makes it attractive both as a therapeutic target for anti-angiogenic drugs and as a pro-angiogenic cytokine for the treatment of ischaemic heart disease. While VEGF binds to two receptor protein tyrosine kinases, VEGFR1...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1016/s0008-6363(00)00268-6
更新日期:2001-02-16 00:00:00
abstract:AIMS:Sphingosine-1-phosphate (S1P), a key regulator of vascular homeostasis and angiogenesis, promotes endothelial cell migration via stimulation of phosphoinositide 3-kinase (PI3K). The aim of this study was to identify the role of PI3Kbeta and gamma isoforms and their downstream effector pathways in mediating endothe...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvn159
更新日期:2008-10-01 00:00:00
abstract:AIMS:Despite the observation that ErbB2 regulates sensitivity of the heart to doxorubicin or ErbB2-targeted cancer therapies, mechanisms that regulate ErbB2 expression and activity have not been studied. Since isoproterenol up-regulates ErbB2 in kidney and salivary glands and β2AR and ErbB2 complex in brain and heart, ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvv274
更新日期:2016-03-01 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::The effect of lidocaine on the effective refractory period of the right ventricle (EVRP) was measured in 10 patients using the extra stimulus technique of progressive introduction of premature stimuli until a response could not be elicited. In four patients lidocaine produced a significant decrease in the EVRP, in a f...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/9.5.621
更新日期:1975-09-01 00:00:00
abstract:OBJECTIVE:Temporal effects of prolonged hypoxaemia and reoxygenation, on the systemic pulmonary and mesenteric circulations in newborn piglets, were investigated. METHODS:Two groups [control (n = 5), hypoxaemic (n = 7)] of 1-3 day old anaesthetised piglets were instrumented with ultrasound flow probes placed to measur...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(98)00080-7
更新日期:1998-08-01 00:00:00
abstract:OBJECTIVES:The present study was designed to determine whether tonic nitric oxide (NO)-mediated vasodilator innervation participates in basilar arterial dilatation in the anesthetized Japanese monkey. METHODS:The basilar arterial diameter was angiographically measured, and NG-nitro-L-arginine (L-NNA), a nitric oxide s...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:
更新日期:1995-11-01 00:00:00
abstract::To evaluate the effect of beta blockade on energy metabolism in ischaemic myocardium metoprolol tartrate in doses of 0.2 or 0.5 mg.kg-1 or saline was injected into 24 anaesthetised dogs 20 min after coronary ligation. Regional myocardial blood flow was measured by the hydrogen gas clearance method, and the heart rate ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/21.9.660
更新日期:1987-09-01 00:00:00
abstract:AIMS:Altered Ca(2+) handling in atrial fibrillation (AF) has been associated with dysregulated protein phosphatase 1 (PP1) and subcellular heterogeneities in protein phosphorylation, but the underlying mechanisms remain unclear. This is due to a lack of investigation into the local, rather than global, regulation of PP...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvu123
更新日期:2014-07-01 00:00:00
abstract::The static mechanical properties of major branches of the human arteries (common carotid artery, abdominal aorta, femoral artery, and brachial artery) were studied in 39 subjects, aged 6-81 years, using an ultrasonic phase locked echo tracking system that allows continuous transcutaneous measurement of the diameter of...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/21.9.678
更新日期:1987-09-01 00:00:00
abstract:OBJECTIVE:Anisotropic conduction characteristics, which may be expressed as the ratio of conduction velocities in the longitudinal (Vlong) and transverse (Vtrans) fibre directions, have been shown to stabilise reentry and favour the induction of sustained, uniform ventricular tachycardia. The aim of this study was to i...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(96)88593-2
更新日期:1995-03-01 00:00:00
abstract:STUDY OBJECTIVE:The aim was to determine if prostaglandin like activity might be involved in changes due to exercise training in the coronary flow responses to hypoxia. DESIGN:The coronary flow response to hypoxia was measured under constant perfusion pressure in isolated perfused hearts from 12 endurance exercise tra...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/24.9.733
更新日期:1990-09-01 00:00:00
abstract::The effect of catheterisation on the rabbit aortic wall is investigated employing a technique identical to that used for continuous monitoring of blood pressure in humans. The catheters were introduced into the aorta through the right femoral artery of the rabbit using the Seldinger technique, except that the catheter...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/13.9.541
更新日期:1979-09-01 00:00:00
abstract:OBJECTIVES:It has been shown that circulating human non-adherent CD34+ cells coexpressing vascular endothelial growth factor (VEGF)-R2 and AC133 have the capacity to differentiate into adherent mature endothelial cells. However, prior studies have demonstrated that a much bigger subset of primary adherent mononuclear c...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(00)00270-4
更新日期:2001-02-16 00:00:00
abstract::Ultrasound has become a useful high resolution imaging modality for examining the cardiac microcirculation. With the use of microbubbles as an ultrasound contrast agent, ultrasound can be utilized to image the microcirculation and detect capillary flow abnormalities in acute ischaemia. A wide range of ultrasound frequ...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1093/cvr/cvp206
更新日期:2009-09-01 00:00:00
abstract::Cardiovascular diseases are among the main causes of morbidity and mortality in Western countries and considered as a leading public health issue. Therefore, there is a strong need for new disease models to support the development of novel therapeutics approaches. The successive improvement of genome editing tools wit...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1093/cvr/cvz250
更新日期:2020-04-01 00:00:00
abstract::Cardiomyocyte death secondary to transient ischaemia occurs mainly during the first minutes of reperfusion in the form of contraction band necrosis. Research on the mechanisms leading to sarcolemmal rupture and necrosis during initial reperfusion identified several promising pharmacological targets directed either to ...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1093/cvr/cvp109
更新日期:2009-07-15 00:00:00
abstract:AIMS:Hyperhomocysteinaemia is an independent risk factor for atherosclerotic vascular disease and is associated with vascular endothelial dysfunction. Homocysteine modulates cellular methylation reactions. P66shc is a protein that promotes oxidative stress whose expression is governed by promoter methylation. We asked ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvr250
更新日期:2011-12-01 00:00:00
abstract:OBJECTIVE:Defects in myocardial mitochondrial structure and function have been associated with heart failure in humans and animal models. Mice lacking the muscle LIM protein (MLP) develop morphological and clinical signs resembling human dilated cardiomyopathy and heart failure. We tested the hypothesis that defects in...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2004.10.025
更新日期:2005-02-01 00:00:00
abstract:OBJECTIVE:In human heart failure beta-adrenergic-mediated protein kinase A (PKA) activity is down-regulated, while protein kinase C (PKC) activity is up-regulated. PKC-mediated myofilament protein phosphorylation might be detrimental for contractile function in cardiomyopathy. This study was designed to reveal the effe...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2005.11.021
更新日期:2006-03-01 00:00:00
abstract:OBJECTIVE:The mechanism of spontaneous myogenic tone was investigated in isolated arteriolar segments. METHODS:Arterioles were isolated from rat cremaster muscle. Segments were endothelium-denuded and mounted in a pressure myograph at 75 mmHg. Under this condition, segments spontaneously constricted from a passive dia...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(98)00161-8
更新日期:1999-01-01 00:00:00
abstract::Acadesine is the prototype of a new class of therapeutic compounds termed adenosine regulating agents. Acadesine is pharmacologically silent in normal circumstances, but its activity becomes operative during situations of net ATP catabolism, when it increases local adenosine levels. Thus acadesine is able to harness t...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1093/cvr/27.1.43
更新日期:1993-01-01 00:00:00
abstract:Aims:Endothelial hyperpermeability exacerbates multiple organ damage during inflammation or infection. The endothelial glycocalyx, a protective matrix covering the luminal surface of endothelial cells (ECs), undergoes enzymatic shedding during inflammation, contributing to barrier hyperpermeability. A disintegrin and m...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvy167
更新日期:2018-11-01 00:00:00
abstract::Regional myocardial anoxia was produced in dogs by perfusion of the left circumflex artery (LCA) with deoxygenated blood. Isolated sarcoplasmic reticulum fragments (cardiac relaxing system) showed decreased Ca2+ binding and uptake. The ability of isolated mitochondria to utilise long-chain fatty acids was markedly red...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/11.6.568
更新日期:1977-11-01 00:00:00
abstract:OBJECTIVE:Cardiac parasympathetic nerve activity is reduced in most cardiovascular disease states, and this may contribute to enhanced cardiac sympathetic responsiveness. Disruption of inhibitory G-proteins (Gi) ablates the cholinergic pathway and increases cardiac endothelial nitric oxide (NO) synthase (eNOS) expressi...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2005.04.034
更新日期:2005-09-01 00:00:00
abstract:AIMS:Heart failure is associated with deficient endothelial nitric oxide (NO) production as well as increased oxidative stress and accelerated NO degradation. The aim of this study was to evaluate platelet NO biosynthesis and superoxide anion (O(2)(-)) production in patients with heart failure. METHODS AND RESULTS:In ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvr115
更新日期:2011-09-01 00:00:00
abstract:OBJECTIVE:Sphingosine 1-phosphate is a naturally occurring biologically active lysophospholipid. Recent studies suggested that sphingosine 1-phosphate is released into the blood flow from activated platelets upon stimulation to exert multiple biological phenomenon. The purpose of this study was to assess the effects of...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(00)00013-4
更新日期:2000-04-01 00:00:00
abstract:OBJECTIVE:The aim was to characterise the influence of a decrease in transsarcolemmal calcium influx on the calcium content of the sarcoplasmic reticulum and on the force of postrest contraction, which is largely activated by calcium released from the sarcoplasmic reticulum. METHODS:Isometric force of postrest contrac...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/27.5.801
更新日期:1993-05-01 00:00:00
abstract::Vascular endothelial growth factors (VEGFs) are key regulators of permeability. The principal evidence behind how they increase vascular permeability in vivo and in vitro and the consequences of that increase are addressed here. Detailed analysis of the published literature has shown that in vivo and in vitro VEGF-med...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1093/cvr/cvq105
更新日期:2010-07-15 00:00:00
abstract:OBJECTIVE:Cardiac energetics and performance depend on the expression level of the fast (alpha-) and slow (beta-) myosin heavy chain (MHC) isoform. In ventricular tissue, the beta-MHC isoform predominates, whereas in atrial tissue a variable mixture of alpha- and beta-MHC is found. In several cardiac diseases, the slow...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2004.09.029
更新日期:2005-01-01 00:00:00