Abstract:
:beta-Adrenoceptor antagonists such as propranolol and atenolol ameliorate the symptoms of human hyperthyroidism. We wished to define whether the cardiac changes of hyperthyroidism are attenuated by treatment with the beta-adrenoceptor antagonist atenolol. Rats were treated with triiodothyronine (T3) [1 mg/kg/day subcutaneously (s.c.) for 14 days] together with oral atenolol (100 mg/day on days 8-14); physiological parameters, inotropic and chronotropic responses in isolated cardiac tissues to compounds that increase intracellular cyclic AMP, and ventricular beta 1- and beta 2-adrenoceptors were measured. Administration of T3 produced marked hyperthyroidism, leading to increased metabolism, cardiac hypertrophy, tachycardia, hypertension, marked decrease in or loss of positive inotropic responses to calcium chloride, norepinephrine (NE), forskolin, and theophylline and increased ventricular beta 1- and beta 2-adrenoceptor density. Atenolol treatment of hyperthyroid rats attenuated the increases in heart rate (HR), rectal temperature, and O2 consumption but did not alter cardiac hypertrophy, hypertension, decreased positive inotropic responses or increased beta-adrenoceptor density. We conclude that beta-adrenoceptor antagonists produce only limited changes in hyperthyroidism-induced cardiovascular responses; furthermore, beta-adrenoceptor antagonists are unlikely to attenuate the cardiovascular risk factors of hyperthyroidism.
journal_name
J Cardiovasc Pharmacoljournal_title
Journal of cardiovascular pharmacologyauthors
Amos G,Kerr D,Sernia C,Brown Lsubject
Has Abstractpub_date
1994-08-01 00:00:00pages
336-43issue
2eissn
0160-2446issn
1533-4023journal_volume
24pub_type
杂志文章abstract::One possible mechanism that accounts for the alterations observed in varicose veins is the activation of endothelial cells by ischemia occurring in the leg veins during blood stasis and the cascade of reactions that follows. Because in vitro data suggest that endothelium alteration is a key event in the development of...
journal_title:Journal of cardiovascular pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00005344-199901000-00002
更新日期:1999-01-01 00:00:00
abstract::The combination of a beta-adrenoceptor-blocking drug with the dihydropyridine calcium channel antagonist, nitrendipine, has particular therapeutic advantages in the management of hypertension. The beta-blocker reduces any reflex increases in sympathetic nervous system and renin-angiotensin system activity that result ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:10.1097/00005344-198806124-00015
更新日期:1988-01-01 00:00:00
abstract::The effects of captopril on systolic function and diastolic myocardial expansion were assessed in an open-chest multiple occlusion model of myocardial stunning. Captopril was given as a 0.25 mg/kg bolus followed by a continuous infusion at 0.25 mg/kg/h for the duration of the stunning protocol, which was initiated 30 ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199304000-00008
更新日期:1993-04-01 00:00:00
abstract::The cholinergic anti-inflammatory pathway has been found to exert a protective role in myocardial ischemia-reperfusion injury (MIRI). Alpha7 nicotinic acetylcholine receptor (α7nAChR) is a regulator of cholinergic anti-inflammatory pathway; however, little information is available on the effect of α7nAChR on MIRI. In ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/FJC.0b013e31824c86c3
更新日期:2012-06-01 00:00:00
abstract::Experiments were carried out on isolated canine right atria to investigate the effects of N-(2-hydroxyethyl)nicotinamide nitrate (nicorandil, SG-75) and its interaction with beta-adrenoceptor stimulation on the cyclic nucleotide levels accompanying inotropic changes. The results were compared with those during muscari...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-198309000-00027
更新日期:1983-09-01 00:00:00
abstract::Pinacidil is one of a number of new antihypertensive agents possessing an action that involves an enhanced potassium efflux in cardiac and vascular smooth muscle. An associated feature of pinacidil is a shortening of the cardiac action potential duration, which may constitute a potentially proarrhythmic effect. The pr...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199003000-00016
更新日期:1990-03-01 00:00:00
abstract::Hypertonic solutions of 0.3 M sodium chloride (NaCl) infused into the third ventricle (ICV) for 20 min in urethane-anesthetized rats consistently elevated mean aortic pressure by approximately 10 mm Hg. Heart rate and sympathetic nerve activity diminished slightly during the first few minutes but then accelerated to a...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-198409000-00017
更新日期:1984-09-01 00:00:00
abstract::Depression of myocardial contractility by muscarinic agonists is dependent on underlying beta-adrenergic tone. The negative inotropic effect of muscarinic agonists is enhanced by previous beta-adrenergic stimulation, an action that has been termed accentuated antagonism. We wished to determine whether accentuated anta...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199512000-00002
更新日期:1995-12-01 00:00:00
abstract::According to the standard model of G protein-coupled receptor (GPCR) signaling, GPCRs are localized to the cell membrane where they respond to extracellular signals. Stimulation of GPCRs leads to the activation of heterotrimeric G proteins and their intracellular signaling pathways. However, this model fails to accomm...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:10.1097/FJC.0000000000000198
更新日期:2015-02-01 00:00:00
abstract::We examined whether the activation of the renin-angiotensin system after intramuscular isoprenaline injection contributes to the simultaneous increase in vasopressin release. Plasma concentrations of vasopressin and angiotensin II were measured in conscious rats using specific radioimmunoassays. Intravenous infusions ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-198011000-00010
更新日期:1980-11-01 00:00:00
abstract::This study was designed to determine if Resolvin D1 (RvD1), a pro-resolution metabolite of the omega-3 polyunsaturated fatty acid docosahexaenoic acid, could decrease myocardial infarct size with delivered at the onset of ischemia. Male Sprague Dawley rats underwent 40 minutes of myocardial ischemia followed by reperf...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/FJC.0000000000000245
更新日期:2015-07-01 00:00:00
abstract::Endothelium-derived relaxing factor (EDRF) and donors of nitric oxide (NO) (glyceryl trinitrate, SIN-1--a metabolite of molsidomine--S-nitroso-N-acetyl-penicillamine, and sodium nitroprusside) but not prostacyclin and its analog, iloprost, relax strips of rabbit aorta. Strips of human coronary artery also relax when e...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1989-01-01 00:00:00
abstract::The acute systemic and regional hemodynamic responses to a single oral dose (4 mg) of the angiotensin converting enzyme inhibitor perindopril were investigated in 10 patients with severe congestive heart failure. Perindopril produced significant and long-lasting decreases in systemic vascular resistance (-18%), right ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199004000-00002
更新日期:1990-04-01 00:00:00
abstract::Six elderly male (65-75 years), seven elderly female (64-88 years), 15 young male (22-38 years), and nine young female (25-37 years) volunteers, all of normal body weight and clinically without cardiac or renal dysfunction, received a single 25-mg intravenous dose of lidocaine. Plasma concentrations of lidocaine were ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-198311000-00027
更新日期:1983-11-01 00:00:00
abstract::It is already well known that alteration of angiotensin II (Ang II) receptors results in cardiac remodeling in different pathological states, and it is believed that Ang II stimulates the release of endothelin-1 (ET-1). The present study aimed at investigating the interaction between ET-1 and different Ang II receptor...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/01.fjc.0000166223.57970.5f
更新日期:2004-11-01 00:00:00
abstract::In the initial seconds after a sudden reduction in coronary blood flow, a temporary mismatch between myocardial energy demand and supply exists. The mechanisms underlying the rapidly ensuing reduction in contractile function in the ischemic myocardium are still unknown. In the presence of some residual blood flow, a s...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:
更新日期:1992-01-01 00:00:00
abstract::We investigated the potential role of atorvastatin, given at reperfusion, to improve survival of the ischemic/reperfused myocardium by activation of p44/42 MAPK and p38 MAPK with its downstream effector, HSP27. We have previously shown that atorvastatin attenuates lethal reperfusion-induced injury via activation of th...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/01.fjc.0000154376.82445.06
更新日期:2005-03-01 00:00:00
abstract::Although evidence has been accumulated to support a role of endothelin-1 (ET-1) in cardiac hypertrophy, details of the pathophysiological significance of ET-1 in cardiac hypertrophy remain to be elucidated. In the present study, we investigated the effects of the vasodilator hydralazine on the blood pressure, cardiac ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200036051-00054
更新日期:2000-11-01 00:00:00
abstract::Previous animal experiments suggest that the increase in the amplitude from the R-wave to the S-wave (RSh) may be more sensitive than other ECG measures to sodium channel blocking drug actions. We measured RSh of three orthogonal leads at baseline and during intravenous pharmacologic stimulation with adenosine, ajmali...
journal_title:Journal of cardiovascular pharmacology
pub_type: 临床试验,杂志文章
doi:10.1097/00005344-199510000-00023
更新日期:1995-10-01 00:00:00
abstract::To examine the role of sulfhydryl (-SH) group in improvement of endothelial dysfunction with angiotensin-converting enzyme (ACE) inhibitors in experimental high dose of methionine dieted rats. We compared the effects of Captopril (an ACE inhibitor with -SH group), enalapril (an ACE-inhibitor without -SH group), N-acet...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/01.fjc.0000195306.61719.64
更新日期:2006-01-01 00:00:00
abstract::We investigated the effects of aranidipine, a dihydropyridine-type Ca2+ channel blocker, on contractile responses to KCl and spontaneous contractions in isolated rat portal veins in comparison with those of the Ca2+ channel blockers, nifedipine, nicardipine, nitrendipine, diltiazem, and verapamil, and of the K+ channe...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199702000-00009
更新日期:1997-02-01 00:00:00
abstract::A double-blind randomised, parallel, placebo-controlled study was performed in patients with congestive heart failure, at 13 centres in 10 countries, to assess the efficacy and safety of lisinopril, a new angiotensin-converting enzyme inhibitor. After a 2-week run-in period, 130 patients receiving digoxin and/or diure...
journal_title:Journal of cardiovascular pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00005344-198700003-00021
更新日期:1987-01-01 00:00:00
abstract::The present article reviews the experience with amiodarone therapy in life-threatening ventricular tachyarrhythmias. In 13 studies, 1,594 patients were treated with amiodarone in average doses of 300 mg/day. The mean annual death rate was 6.2%; the annual withdrawal rate averaged 8%. Risk factors for arrhythmia recurr...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:
更新日期:1992-01-01 00:00:00
abstract::The presence of endothelin (ET) receptors and the nature of the subtype and expression of ET were investigated in the human megakaryoblastic cell line MEG-01. By the RT-PCR procedure, we have shown that both ETA and ETB receptor subtype mRNAs are expressed in the cells. However, binding experiments have shown that the...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1995-01-01 00:00:00
abstract::Amylin is a 37-amino acid peptide that shares considerable homology with calcitonin gene-related peptide (CGRP). Both peptides exert glycoregulatory actions and produce vasodilation of the cardiovascular system. We wished to determine if amylin exerts vasodilatory action in the perfused mesenteric arterial bed in a ma...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199512000-00012
更新日期:1995-12-01 00:00:00
abstract::Chronic stimulation of beta-adrenoceptors with isoproterenol induces alteration of vascular reactivity and increases local pro-inflammatory cytokines. We investigated whether fenofibrate and pioglitazone, PPAR-alpha and -gamma agonists, respectively, improve the changes in vascular reactivity induced by isoproterenol....
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/FJC.0b013e31818a8927
更新日期:2008-11-01 00:00:00
abstract::In the present study we characterized the effects of and receptors for endothelins (ETs) in the guinea pig mesenteric arterial and venous vasculatures. Endothelin-1 (ET-1) (10-500 pmol) induced a dose-dependent increase of perfusion pressure of the arterial and venous beds. ET-2 (10-500 pmol) also induced a dose-depen...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1995-01-01 00:00:00
abstract:BACKGROUND:A substantial proportion of patients with heart failure have a normal ejection fraction and diastolic dysfunction. However, there are few data available to guide the therapy of these patients. The effects of statins on cardiac remodeling are well documented in animal models and it is reported that statin the...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/FJC.0b013e31815bb629
更新日期:2008-01-01 00:00:00
abstract::A dyshomeostasis of extra- and intracellular Ca(2+) and Zn(2+) occurs in rats receiving chronic aldosterone/salt treatment (ALDOST). Herein, we hypothesized that the dyshomeostasis of intracellular Ca(2+) and Zn(2+) is intrinsically coupled that alters the redox state of cardiac myocytes and mitochondria, with Ca(2+) ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/FJC.0b013e3181a15e77
更新日期:2009-05-01 00:00:00
abstract::Activation of adrenoceptors of the alpha 2-subtype can cause an inhibitory or an excitatory response, depending on the cellular system affected. At the plasma membrane, where the extracellular signal is transduced via the alpha 2-adrenoceptor into an intracellular signal, only one transduction process has clearly been...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-198500076-00018
更新日期:1985-01-01 00:00:00