Abstract:
STUDY OBJECTIVE:Protective effects of nipradilol, a newly synthesised vasodilating beta adrenoceptor antagonist, isosorbide dinitrate, and bunazosin on coronary artery constriction induced by intracoronary injection of acetylcholine were determined by coronary arteriography and compared in vivo in pigs. DESIGN:Acetylcholine (12.5, 25, 50, 100 and 200 micrograms) was given into the right coronary artery under left ventricular pacing to maintain constant systemic haemodynamics. Percentage narrowing of the major epicardial coronary artery was used as an indicator of constriction of the large coronary arteries, and the time required for the contrast medium to reach the posterior descending coronary artery from the ostium of the right coronary artery (blood flow delay) was used as an indicator of constriction of the small coronary arteries. SUBJECTS:15 farm pigs weighing 80 to 90 kg were used. MEASUREMENTS AND MAIN RESULTS:A marked blood flow delay of over 7.0 s (control: less than or equal to 1.8 s) with less than 34% narrowing of the epicardial major coronary artery was observed in 13 of 15 pigs with 12.5-50 micrograms of acetylcholine, and in the other two pigs with 100 micrograms of acetylcholine. When marked blood flow delay occurred, the perfused right ventricular myocardium became macroscopically anaemic (ischaemic). Over 75% narrowing of the major epicardial coronary artery was induced in six of the 15 pigs, and over 50% narrowing in 12, with marked blood flow delay with 100 to 200 micrograms of acetylcholine. However, after intracoronary infusion of 10 micrograms of nipradilol, acetylcholine induced narrowing in the epicardial major coronary artery was significantly reduced from 44-79% in control to 19-37% despite 200 micrograms of acetylcholine, though the time delay in coronary blood flow did not change significantly. By pretreatment with intracoronary isosorbide dinitrate (2.5 mg), the percent narrowing of the large coronary artery and the time delay in coronary blood flow were significantly reduced (narrowing from 32-84% to 10-27%; time delay from 7.6-41.6 s to 2.7-22.7 s). Pretreatment with intracoronary bunazosin, an alpha 1 adrenoceptor antagonist (100 micrograms), showed no protective effect on narrowing of the epicardial major coronary artery or blood flow delay. CONCLUSIONS:Isosorbide dinitrate prevents coronary artery constriction induced by acetylcholine in swine. Nipradilol prevents large, but not small, coronary artery constriction, probably through a direct nitrate like vasodilating action.
journal_name
Cardiovasc Resjournal_title
Cardiovascular researchauthors
Kawamura A,Fujiwara H,Ishida M,Takemura G,Kida M,Uegaito T,Tanaka M,Kawai Cdoi
10.1093/cvr/24.12.1013subject
Has Abstractpub_date
1990-12-01 00:00:00pages
1013-9issue
12eissn
0008-6363issn
1755-3245journal_volume
24pub_type
杂志文章abstract:AIMS:Exercise capacity is reduced in heart failure (HF) patients, due mostly to skeletal muscle abnormalities including impaired energy metabolism, mitochondrial dysfunction, fibre type transition, and atrophy. Glucagon-like peptide-1 (GLP-1) has been shown to improve exercise capacity in HF patients. We investigated t...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvw182
更新日期:2016-09-01 00:00:00
abstract:AIMS:JNJ-64179375 (hereafter JNJ-9375) is a first-in-class, highly specific, large molecule, exosite 1 thrombin inhibitor. In preclinical studies, JNJ-9375 demonstrated robust antithrombotic protection with a wider therapeutic index when compared to apixaban. The purpose of the present study was to examine for the firs...
journal_title:Cardiovascular research
pub_type: 杂志文章,随机对照试验
doi:10.1093/cvr/cvy227
更新日期:2019-03-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to determine whether exercise training could precondition the myocardium against hydrogen peroxide (H(2)O(2))-induced damage. METHODS:Male Fischer 344 rats ran on a treadmill for 9 weeks (60 min/day, 22 m/min, 6 degrees grade, 5 days/week). Isolated perfused working hearts from ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(03)00285-2
更新日期:2003-06-01 00:00:00
abstract::Cardiac hypertrophy occurs in a number of disease states associated with chronic increases in cardiac work load. Although cardiac hypertrophy may initially represent an adaptive response of the myocardium, ultimately, it often progresses to ventricular dilatation and heart failure. Much investigation has focused on th...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1016/j.cardiores.2004.04.002
更新日期:2004-08-15 00:00:00
abstract:AIMS:Proliferation of mammalian cardiomyocytes stops during the first weeks after birth, preventing the heart from regenerating after injury. Recently, several studies have indicated that induction of cardiomyocyte proliferation can be utilized to regenerate the mammalian heart. Thus, it is important to identify novel ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvp360
更新日期:2010-03-01 00:00:00
abstract:AIMS:n-3 Polyunsaturated fatty acids (PUFAs) are known to protect the cardiovascular system and improve blood pressure control. These important dietary constituents are converted into bioactive metabolites, but their role in regulation of the cardiovascular system is unclear. In particular, the functions of the cytochr...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvq411
更新日期:2011-05-01 00:00:00
abstract:OBJECTIVE:The aim was to examine the role of nitric oxide (NO) in the myocardial microcirculation. METHODS:Open chest anaesthetised dogs received intracoronary infusion of NG-monomethyl-L-arginine (L-NMMA; 0.5 mg.kg-1 over 30 min). Myocardial microvascular extraction fraction of a small hydrophilic solute (technetium ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:
更新日期:1995-06-01 00:00:00
abstract:AIMS:Free fatty acids induce apoptosis in cardiomyocytes, which is implicated in lipotoxic cardiomyopathy. However, the underlying mechanisms remain not fully understood. MicroRNAs (miRNAs) are non-coding small RNAs that control gene expression at the post-transcriptional level. Dysregulated miRNAs have been shown to b...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvr145
更新日期:2011-10-01 00:00:00
abstract:OBJECTIVES:M cells have been described in many mammalian species. They are thought to be relevant for the genesis of long QT intervals, afterdepolarizations and for dispersion in action potential duration and in repolarization time. Their role in the human heart is subject to debate. METHODS:We simulated action potent...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2004.02.016
更新日期:2004-05-01 00:00:00
abstract::Hyponatremia is a frequent electrolyte disorder. It is often found in congestive cardiac failure, liver cirrhosis, plasma volume contraction and in SiADH. In these disorders hyponatremia is caused by nonosmotic vasopressin and sustained fluid intake. This provides a rationale for V2 vasopressin receptor antagonists in...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1016/s0008-6363(01)00288-7
更新日期:2001-08-15 00:00:00
abstract::Vascular smooth muscle cells (vSMCs) play a crucial role in both the pathogenesis of Aneurysms and Dissections of the ascending thoracic aorta (TAAD) in humans and in the associated adaptive compensatory responses, since thrombosis and inflammatory processes are absent in the majority of cases. Aneurysms and dissectio...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1093/cvr/cvy006
更新日期:2018-03-15 00:00:00
abstract::Myocardial capillary permeability was determined in 20 dogs by applying a new method which resembles the tissue-uptake technique. The method consisted of a bolus injection of 51Cr-EDTA into the left atrium, determination of the average arterial tracer concentration and subsequent assay of myocardial tissue activity 10...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/18.5.277
更新日期:1984-05-01 00:00:00
abstract:AIMS:TRPM2 is a Ca(2+)-permeable cationic channel of the transient receptor potential (TRP) superfamily that is linked to apoptotic signalling. Its involvement in cardiac pathophysiology is unknown. The aim of this study was to determine whether the pro-apoptotic cytokine tumour necrosis factor-α (TNF-α) induces a TRPM...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvu112
更新日期:2014-07-01 00:00:00
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...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2004.05.015
更新日期:2004-09-01 00:00:00
abstract:AIM:Clinical use of amiodarone is associated with occasional development of torsade de pointes (TdP). However, preclinical models have failed to demonstrate the proarrhythmic potential of amiodarone. The objective of this study was to reveal and explain the pro- and anti-arrhythmic effects of acute exposure to amiodaro...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvm069
更新日期:2008-02-01 00:00:00
abstract:OBJECTIVE:Numerous studies support the concept of impaired postischemic sympathetic neurotransmission in the heart. We hypothesized that postischemic neuronal dysfunction (neuronal stunning) is caused by a transient suppression of exocytotic norepinephrine (NE) release from sympathetic nerve terminals. Furthermore, we ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(00)00309-6
更新日期:2001-03-01 00:00:00
abstract::Cardiomyocytes are long-lived post-mitotic cells with limited regenerative capacity. Proper cardiomyocyte function depends critically on the maintenance of a healthy homeostasis of protein expression, folding, assembly, trafficking, function, and degradation, together commonly referred to as proteostasis. Impairment o...
journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1093/cvr/cvv265
更新日期:2016-04-01 00:00:00
abstract:OBJECTIVES:Natural angiogenesis has been shown to be impaired in spontaneously hypertensive rats (SHR). The purpose of this study was to determine whether pathological angiogenesis in the setting of tissue ischemia is also impaired in SHR, and to what extent it is modified by angiotensin-converting enzyme (ACE) inhibit...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(01)00372-8
更新日期:2001-11-01 00:00:00
abstract:OBJECTIVE:The aim was to examine whether an absolute reduction in energy supply is required for preconditioning against myocardial infarction, and whether an episode of increased adrenergic activity with or without supply-demand imbalance is capable of triggering cardioprotection. METHODS:41 anaesthetised dogs were su...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/27.11.2071
更新日期:1993-11-01 00:00:00
abstract:AIMS:Vascular inflammation is a major atherogenic factor and Toll-like receptor (TLR) 2 ligands, including bacterial and serum lipoproteins, seem to be involved in atherogenesis. On this basis, we analysed the effect of lipoproteins and different lipid components on TLR2-dependent signalling. METHODS AND RESULTS:In TL...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvn087
更新日期:2008-08-01 00:00:00
abstract:OBJECTIVE:The role of phosphorylation of the ryanodine receptor at serine-2808 (RyRS2808) in congestive heart failure (CHF) is controversial, and effects of RyRS2808 phosphorylation on contraction are unclear. It has been reported that diastolic sarcomere length (SL) fluctuations accompany propagating contractile waves...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2005.07.010
更新日期:2006-01-01 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::Postextrasystolic potentiation was studied by means of a catheter-tip manometer in patients with and without cardiomyopathy. The results imply that the enhancement of the left ventricular contraction is increased in patients with cardiomyopathy. ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/9.3.336
更新日期:1975-05-01 00:00:00
abstract:OBJECTIVES:The aim was to determine the effect and mechanisms by which myocyte stretch interacts with the prolongation of action potential duration (APD) by the class III antiarrhythmic agent E-4031. METHODS:Action potentials and whole-cell currents were measured in isolated guinea pig ventricular myocytes with a patc...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:
更新日期:1996-02-01 00:00:00
abstract:OBJECTIVE:The aim was to compare differences in peak twitch force occurring despite similar degrees of right ventricular hypertrophy in ferrets with pulmonary artery banding at either weanling or juvenile age. METHODS:After inducing pressure overload hypertrophy by banding the pulmonary artery of weanling and juvenile...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:
更新日期:1995-04-01 00:00:00
abstract:AIMS:ATP sensitive K(+) channels (K(ATP)) sense adenine nucleotide concentrations and thus couple the metabolic state of the cell to membrane potential. The hetero-octameric complex of a sulphonylurea receptor (SUR2B) and an inwardly rectifying K(+) channel (Kir6.1) and the corresponding native channel in smooth muscle...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvn138
更新日期:2008-09-01 00:00:00
abstract:AIMS:Recent publications have shed new light on the role of the adaptive and innate immune system in the pathogenesis of hypertension. However, there are limited data whether receptors of the innate immune system may influence blood pressure. Toll-like receptor 4 (TLR4), a pattern recognition receptor, is a key compone...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvt265
更新日期:2014-03-01 00:00:00
abstract:OBJECTIVE:To determine the effect of acute left ventricular dilatation on refractoriness in normal hearts. METHODS:During sustained ventricular fibrillation (VF) in isolated perfused hearts, recording of local activation time yields VF intervals which provide an index of local refractoriness. Simultaneous measurement ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(98)00092-3
更新日期:1998-08-01 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:Increased pulse pressure has been observed in aging subjects, but the impact on the structure and reactivity of small arteries has been scarcely evaluated. METHODS:This study presents the modifications of vascular structure and function observed in female rats of 5, 18 and 32 months of age, and their relatio...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(97)00225-3
更新日期:1998-01-01 00:00:00