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 and aortic pressure were recorded. After 60 min coronary occlusion myocardial biopsy specimens were removed from five areas where myocardial blood flow had been recorded to determine their content of adenosine-5'-triphosphate (ATP). Respiratory function and acyl-coenzyme A contents of mitochondria isolated from ischaemic and non-ischaemic myocardium were also measured. In the control group the ATP content in severely ischaemic myocardium where myocardial blood flow was less than 20 ml.min-1.100 g-1 was decreased to 27.5% of that in the non-ischaemic area, whereas the administration of metoprolol 0.5 mg.kg-1 maintained ATP content at 46.3%. In ischaemic myocardium metoprolol inhibited the accumulation of long chain acyl-coenzyme A in mitochondria and significantly preserved their respiratory function. In contrast, metoprolol did not affect myocardial blood flow in myocardium where flow was less than 60 ml.min-1.100 g-1. Heart rate was decreased by metoprolol in proportion to the dose, whereas mean aortic pressure was not changed. These results suggest that beta blockade had beneficial effects on the energy metabolism of ischaemic myocardium and that such effects might be due not only to a reduction in cardiac work but also to a reduction in the vicious circle of fatty acid metabolism in ischaemic myocardium.
journal_name
Cardiovasc Resjournal_title
Cardiovascular researchauthors
Nanki M,Itoh K,Matsubara T,Nishimura K,Kambe T,Sugiyama S,Ozawa T,Sakamoto Ndoi
10.1093/cvr/21.9.660subject
Has Abstractpub_date
1987-09-01 00:00:00pages
660-7issue
9eissn
0008-6363issn
1755-3245journal_volume
21pub_type
杂志文章abstract：Aims:RHOA-ROCK signalling regulates cell migration, proliferation, differentiation, and transcription. RHOA is expressed in the developing cardiac conduction system in chicken and mice. In early development, the entire sinus venosus myocardium, including both the transient left-sided and the definitive sinoatrial node ...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvx104
更新日期：2017-08-01 00:00:00
abstract：AIMS:The P2Y12 antagonist ticagrelor reduces mortality in patients with acute coronary syndrome (ACS), compared with clopidogrel, and the mechanisms underlying this effect are not clearly understood. Arterial thrombosis is the key event in ACS; however, direct vascular effects of either ticagrelor or clopidogrel with f...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvw233
更新日期：2017-01-01 00:00:00
abstract：:By measuring the coronary sinus blood flow using the thermodilution technique the influence of "thermodilution catheter" withdrawal from the great cardiac vein to the ostium of the coronary sinus was investigated in 41 patients. In addition, the influence of normal and forced respiration on coronary sinus blood flow w...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/19.1.27
更新日期：1985-01-01 00:00:00
abstract：OBJECTIVE:Washed platelets have been shown to protect isolated buffer perfused rat hearts from injury and dysfunction following ischaemia-reperfusion. This study was designed to investigate whether platelet glutathione redox cycle contributes to the protective effect of platelets. METHODS:Isolated rat hearts were perf...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/28.10.1586
更新日期：1994-10-01 00:00:00
abstract：:Because of ventricular interdependence, part of the measured left ventricular diastolic pressure can be attributed to the right ventricle. Therefore, we examined the hypothesis that left ventricular diastolic properties are modified by alterations in right ventricular compliance and pressure even without a change in r...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/22.11.768
更新日期：1988-11-01 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：OBJECTIVE:The aims of the study were to determine the effect of chronic pressure overload of the left ventricle on the density and distribution of neuropeptide-Y-like immunoreactive (NPY-LI) nerve fibres in heart and to compare any changes to those observed in adrenergic nerve fibres, identified by dopamine beta-hydrox...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/27.3.494
更新日期：1993-03-01 00:00:00
abstract：UNLABELLED:This study hypothesized that female patients with chronic heart failure (CHF), similarly as previously reported for male patients, have a decreased proportion of type I (slow twitch) muscle fibers combined with fiber atrophy, and respond to exercise training with an increased muscular fiber area and performa...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(98)00313-7
更新日期：1999-04-01 00:00:00
abstract：OBJECTIVE:In the present study, we delivered vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) gene to a rabbit model of hind limb ischemia utilizing an ex vivo method of gene transfer, and evaluated the functional performance of the developed collateral vessels. METHOD:The left femor...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/j.cardiores.2003.10.003
更新日期：2004-01-01 00:00:00
abstract：OBJECTIVE:Vascular responsiveness to vasoconstrictors is known to be attenuated in haemorrhagic shock. In this study we assessed the temporal development and the underlying mechanisms of haemorrhage-induced vascular hyporeactivity to pressor agents. METHODS:In phenobarbital-anaesthetised rats hypotension was induced b...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(99)00194-7
更新日期：1999-10-01 00:00:00
abstract：AIMS:The lysophospholipid mediator sphingosine-1-phosphate (S1P) acts on vascular endothelial cells to stimulate migration, proliferation, and capillary-like tube formation in vitro. It is unknown whether S1P stimulates in vivo angiogenesis induced under tissue ischaemia. We investigated the effects of both exogenously...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvn002
更新日期：2008-05-01 00:00:00
abstract：:Diabetes is one of the most prevalent chronic conditions that has a high association with death from cardiovascular disease(s). An impaired cardiac function independent of vascular disease suggests the existence of a primary myocardial defect in diabetes mellitus. We and others have documented that myocardial performa...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1016/s0008-6363(97)00059-x
更新日期：1997-04-01 00:00:00
abstract：OBJECTIVE:The aim was to examine the ventricular expression of brain natriuretic peptide (BNP) in the transplanted human heart. METHODS:Serial right ventricular biopsies (n = 68) and plasma samples (n = 68) were obtained for measurement of BNP and atrial natriuretic peptide (ANP) from 14 orthotopic cardiac transplant ...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/27.2.188
更新日期：1993-02-01 00:00:00
abstract：OBJECTIVES:Conduction of vasoconstrictor and vasodilator responses in the microcirculation involves electrical coupling through gap junction channels among cells of the vascular wall. The present study determined whether reported differences in the properties of conduction along the arterioles of the epithelial hamster...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/j.cardiores.2003.09.017
更新日期：2003-12-01 00:00:00
abstract：OBJECTIVE:Insulin protects cardiomyocytes from apoptosis. Insulin resistance usually refers to a defect in the ability of insulin to stimulate glucose uptake. It is unknown, however, whether or not insulin resistance compromises the cell-protective effect of the hormone. Caspases are a family of cysteine proteases that...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/j.cardiores.2007.07.012
更新日期：2007-12-01 00:00:00
abstract：:Electrophysiologic remodeling is a process whereby heart disease alters the electrophysiologic properties of cardiac tissue. These alterations, in turn, can cause or exacerbate disease-related arrhythmias. Ion channels are the fundamental molecular units underlying cardiac electrophysiology, and it therefore follows t...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1016/s0008-6363(99)00063-2
更新日期：1999-05-01 00:00:00
abstract：:There is mounting interest in the use of the monophasic action potential for electrophysiological investigation of regional myocardial ischaemia. There is, however, no systematic study of the relation between the changes in monophasic action potential and regional myocardial blood flow. In this study monophasic action...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/20.10.740
更新日期：1986-10-01 00:00:00
abstract：OBJECTIVE:Inhibitors of poly (ADP-ribose) synthetase (PARS) activity reduce the infarct size caused by regional myocardial ischaemia and reperfusion in the rabbit and rat in vivo. The mechanism of action of these inhibitors is unclear. Here we investigate the effects of the PARS inhibitor 3-aminobenzamide (3-AB) on inf...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(98)00221-1
更新日期：1999-01-01 00:00:00
abstract：:One of the striking differences that distinguish the adult from the embryonic heart in mammals and set it apart from the heart in urodeles and teleosts is the incapacity of cardiomyocytes to respond to damage by proliferation. While the molecular reasons underlying these characteristics still await elucidation, mounti...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1093/cvr/cvu057
更新日期：2014-05-01 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：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：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：AIMS:Recent immunohistochemical studies observed the loss of plakoglobin (PG) from the intercalated disc (ID) as a hallmark of arrhythmogenic right ventricular cardiomyopathy (ARVC), suggesting a final common pathway for this disease. However, the underlying molecular processes are poorly understood. METHODS AND RESUL...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvq353
更新日期：2011-04-01 00:00:00
abstract：:Matricellular proteins are extracellular matrix proteins that modulate cell-matrix interactions and cell function, and do not seem to have a direct structural role. The family includes tenascin-C (TN-C), tenascin-X (TN-X), osteonectin, osteopontin, thrombospondin-1 (TSP1) and thrombospondin-2 (TSP2). Expression of mat...
journal_title：Cardiovascular research
pub_type： 杂志文章,评审
doi：10.1016/j.cardiores.2004.06.006
更新日期：2004-10-01 00:00:00
abstract：OBJECTIVE:Atrial remodeling contributes to the maintenance of atrial fibrillation (AF) in several cardiac disorders. There is evidence that angiotensin-converting enzyme (ACE) inhibitors reduce the prevalence of AF in patients with congestive heart failure (CHF). There have been no studies performed to assess the effec...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/s0008-6363(02)00243-2
更新日期：2002-05-01 00:00:00
abstract：:The effects of both gradual and abrupt coronary occlusion on regional wall function (sonomicrometry) and left ventricular relaxation were studied in the intact dog heart. The ischaemic dysfunction observed in the two interventions as assessed by pressure-length loops showed considerably different patterns. The regiona...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/21.7.507
更新日期：1987-07-01 00:00:00
abstract：OBJECTIVES:5-Hydroxytryptamine (5-HT) has a wide range of vascular effects mediated via specific receptors and it has been suggested to be a mediator in ischemic heart disease. The aim of the present study was to localise the 5-HT receptors within the vessel wall. METHODS:Epicardial coronary arteries obtained from pat...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1016/0008-6363(96)00029-6
更新日期：1996-05-01 00:00:00
abstract：Aims:Circulating proteins larger than 3 nm can be transported across continuous endothelial barrier of blood vessels via transcytosis. However, excessive accumulation of serum proteins within the vessel walls is uncommon even for those abundant in the circulation. The aim of this study was to investigate how transcytos...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/cvy181
更新日期：2019-02-01 00:00:00
abstract：:When the vagus nerves are stimulated with one burst of pulses per minute, but each burst is placed at a different time in the cardiac cycle, a "vagal effect curve" can be derived which displays the changes in cardiac cycle length (CCL) as a function of the elapsed time from the stimulus. This curve consists of a prima...
journal_title：Cardiovascular research
pub_type： 杂志文章
doi：10.1093/cvr/18.2.75
更新日期：1984-02-01 00:00:00
