Abstract:
:Forskolin exerts concentration-dependent positive inotropic effects in guinea pig isolated papillary muscles; resting potential, overshoot, and upstroke velocity remain unchanged. It markedly potentiates Ca2+-mediated action potentials elicited in partially depolarized myocardial fibers (increases in upstroke velocity, height, and action potential duration) and restores slow-channel-mediated transmembrane Ca2+ influx and contractile force under conditions of external Ca2+ withdrawal or in the presence of the specific Ca2+ antagonist D 600. In partially depolarized ventricular muscle, the potentiation of transmembrane inward Ca2+ current by forskolin is correlated with a reciprocal inhibition of Mg2+-induced electrogenic membrane effects. In this respect, forskolin resembles other Ca2+ influx promoters such as beta-adrenoceptor agonists, histamine, and dibutyryl-cyclic AMP (cAMP). All these agents favor sarcolemmal Ca2+ accumulation through increases in intracellular cAMP and the subsequent formation of Ca2+-binding phosphorylated membrane proteins; Mg2+ ions seem to be displaced by Ca2+. These findings support the concept that the effects of forskolin result from an increase in intracellular cAMP.
journal_name
J Cardiovasc Pharmacoljournal_title
Journal of cardiovascular pharmacologyauthors
Späh Fsubject
Has Abstractpub_date
1984-01-01 00:00:00pages
99-106issue
1eissn
0160-2446issn
1533-4023journal_volume
6pub_type
杂志文章abstract::During the last few years, there has been a growing awareness that treated hypertensive patients are still at substantially increased risks for cardiovascular morbidity and mortality and that one conceivable explanation for this is that their blood pressure has not been lowered to strictly normotensive levels. To obta...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:10.1097/00005344-198812006-00026
更新日期:1988-01-01 00:00:00
abstract::There are several first choices for mild and moderate hypertension. The selection of a drug may of course be influenced by concomitant pathology, with positive indications for particular drugs: for coexistent angina, a beta-receptor blocking drug or a calcium antagonist; for fluid retention, a diuretic; or for contrai...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:
更新日期:1987-01-01 00:00:00
abstract::The functional and anatomical abnormalities of the right ventricle may occur in hypertensive patients with left ventricular hypertrophy (LVH). The present study was designed to assess the functional and structural changes in both left and right ventricles induced by chronic antihypertensive therapy. Doppler and standa...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199117002-00039
更新日期:1991-01-01 00:00:00
abstract::We studied the effects of felodipine [4-(2,3-dichlorophenyl)-1,4-dihydropyridine-2,6-dimethyl 3,5-dicarboxylic 3-ethylester and 5-methylester] on the coronary vascular bed of pig hearts with an ischemic region in the left ventricle following ligation of the left anterior descending coronary artery. At an infusion rate...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-198303000-00006
更新日期:1983-03-01 00:00:00
abstract::The effects of reactive oxygen species (ROS) on different cellular types are variable. In some conditions they can be harmful metabolites, but they can also act as intracellular messengers that are able to activate different transcription factors. Based on previous reports in which ROS were shown to stimulate the prol...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200001000-00014
更新日期:2000-01-01 00:00:00
abstract::Lisinopril (LIS) is a lysine analog of enalaprilat, the active metabolite of enalapril, an angiotensin-converting enzyme inhibitor (ACEI). Unlike enalapril, the precursor of enalaprilat, LIS is not a prodrug but has equal ACEI efficacy and potency and a slightly longer duration of action after oral administration. Sho...
journal_title:Journal of cardiovascular pharmacology
pub_type: 临床试验,杂志文章
doi:10.1097/00005344-198700003-00010
更新日期:1987-01-01 00:00:00
abstract::The cardiovascular profile of SC-36602, a new class 1A/1B antiarrhythmic agent, was compared to those of disopyramide, lidocaine, mexiletine, flecainide, encainide, lorcainide, and quinidine. These drugs were compared at their respective canine antiarrhythmic doses in a hemodynamic evaluation using anesthetized dogs. ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1988-06-01 00:00:00
abstract:UNLABELLED:Oxidative stress is an important risk factor in the pathogenesis of atherosclerosis. Angiotensin-converting enzyme (ACE) inhibitors attenuate atherosclerosis and oxidative stress in animal models. Omapatrilat, a VasoPeptidase-inhibitor, selectively inhibits both Neutral-Endo-Peptidase (NEP) and ACE. OBJECTI...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200401000-00021
更新日期:2004-01-01 00:00:00
abstract::The propyl derivative of ajmaline, N-n-propylajamaline (prajmalium), is an antiarrhythmic compound that lacks the commonly reported negative inotropic effects of all others under clinical use. The present study was undertaken to establish and understand its effects at the cellular level in mammalian preparations. Elec...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1992-07-01 00:00:00
abstract::To investigate the effects of ramipril, a new angiotensin converting enzyme inhibitor, on autonomic function, autonomic function tests were performed in eight healthy male subjects, aged 22-26 years, after single oral administration of 5 mg of ramipril or placebo, in a randomized, double-blind, crossover design. Measu...
journal_title:Journal of cardiovascular pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00005344-198900133-00010
更新日期:1989-01-01 00:00:00
abstract::Hypertension is a well-known risk factor that predisposes to the development of left ventricular hypertrophy, coronary flow abnormalities, and systolic and diastolic dysfunction. This complex of abnormalities is known as hypertensive heart disease and eventually leads to heart failure. Structural lesions underlying th...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:10.1097/00005344-199800003-00003
更新日期:1998-01-01 00:00:00
abstract::Arterial vascular resistance is established by myogenic mechanisms and is modulated both by local factors such as vasodilator metabolites and by remote controls of neurogenic and hormonal origin. This paper reports on the effects of felodipine and hydralazine on the myogenic tone and the neurogenic control of the vasc...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-198710001-00019
更新日期:1987-01-01 00:00:00
abstract::Drug-induced delayed cardiac repolarization is a recognized risk factor for proarrhythmia and is associated with block of IKr (the potassium current encoded by the human ether-a- go-go-related gene [hERG]). To evaluate the utility of 2 in vitro assays widely used to assess delayed repolarization, we compared the effec...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200403000-00007
更新日期:2004-03-01 00:00:00
abstract::The cardioprotective effects of bisoprolol were studied in a rat model of severe heart failure induced by autoimmune myocarditis. Twenty-eight days after immunization, Lewis rats were divided into four groups: 0.1 mg/kg/day bisoprolol (Group 0.1), 1.0 mg/kg/day bisoprolol (Group 1) and 10 mg/kg/day bisoprolol (Group 1...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200110001-00012
更新日期:2001-10-01 00:00:00
abstract::In a prospective randomized study, we assessed the electrophysiologic effects and the efficacy of ajmaline versus propafenone in patients with accessory pathways (APs). During initiated atrioventricular (AV) reentrant tachycardia or atrial fibrillation (AF), ajmaline (1 mg/kg as bolus followed by infusion of 15 microg...
journal_title:Journal of cardiovascular pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00005344-199410000-00018
更新日期:1994-10-01 00:00:00
abstract::We determined stimulation rates of cardiac adenylate cyclase activity by isoproterenol and impromidine in particulate sarcolemmal membrane preparations from human papillary muscles resected during open heart replacement of mitral and aortic valves. In addition, specific receptor binding studies with [3H]dihydroalpreno...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-198307000-00017
更新日期:1983-07-01 00:00:00
abstract::We wished to test (a) whether single-drug therapy with a low dose of the angiotensin-converting enzyme (ACE) inhibitor perindopril has the capacity to improve early survival of the cardiomyopathic Syrian hamster (CSH); (b) whether early treatment with perindopril modifies CSH survival to a greater extent than perindop...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199407000-00023
更新日期:1994-07-01 00:00:00
abstract::Serotonin (5-hydroxytryptamine, 5-HT) mediates vasoconstriction and vasodilation in normal coronary circulation of various animal species. In the presence of coronary artery disease, serotonin may inhibit coronary collateral formation and stimulate predominantly vasoconstriction. We tested the effect of ketanserin, a ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199301000-00021
更新日期:1993-01-01 00:00:00
abstract::To slow ventricular rate during supraventricular tachycardia, a drug must have a strong rate-dependent depressant effect on atrioventricular (AV) conduction. We investigated the frequency-dependent effects of verapamil, amiodarone, digoxin, and diltiazem on AV conduction time (AVCT) in isolated guinea pig heart perfus...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199502000-00020
更新日期:1995-02-01 00:00:00
abstract::Isoprostanes are a family of prostaglandin-related compounds formed from arachidonic acid in a cyclooxygenase-independent manner as products of free radical-initiated lipid peroxidation. To elucidate the biological activity of the F2-and E2-isoprostanes, 8-iso-prostaglandin F2alpha (8-iso-PGF2alpha) and 8-iso-prostagl...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199706000-00012
更新日期:1997-06-01 00:00:00
abstract::Left ventricular (LV) function and end-diastolic dimensions were determined during antegrade and retrograde perfusions, respectively. Isolated hearts from spontaneously hypertensive rats (SHRs) and renal hypertensive rats and SHRs to which either feldopine, nifedipine, alpha-methyldopa, or a combination of felodipine ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1987-01-01 00:00:00
abstract::The peptide vasoconstrictors angiotensin II (Ang II) and endothelin-1 (ET-1), originally thought to derive exclusively from the plasma renin-angiotensin system and vascular endothelium, respectively, have been demonstrated to be produced independently of such sources. Local tissue angiotensin-generating systems are we...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:10.1097/00005344-199322005-00007
更新日期:1993-01-01 00:00:00
abstract::Clinical trials in patients with congestive heart failure have shown a wide disparity in the hemodynamic responses to chronic therapy with newer positive inotropic drugs. Therefore, the long-term efficacy of enoximone was studied in 10 patients with severe congestive heart failure. Patients were evaluated clinically, ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1989-01-01 00:00:00
abstract::In this study, the authors sought to evaluate the mechanisms responsible for echocardiographically determined differences in cardiac structure and function between conscious and anesthetized mice to determine whether such differences were more or less evident in diseased states. Cardiac parameters were determined by t...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200308000-00005
更新日期:2003-08-01 00:00:00
abstract::As cyclic 3',5'-guanosine monophosphate (cGMP) is still discussed as a possible mediator of the negative inotropic effects of cholinergic agents, the influence of acetylcholine (ACh) on force of contraction and cGMP tissue levels was studied in isolated, electrically driven guinea pig auricles in the presence of methy...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-198611000-00009
更新日期:1986-11-01 00:00:00
abstract::Our earlier study in vivo showed that a lower dose of acetylsalicylic acid (ASA) brought greater enhancement in fibrin gel permeability (Ks) than a higher dose. To assess whether this finding related to modifications of fibrinogen clotting property by ASA, purified fibrinogen was incubated with ASA and/or salicylic ac...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/FJC.0b013e3181953e0f
更新日期:2009-01-01 00:00:00
abstract::The serotonin (5-HT2A) antagonistic activities and the protective effect on laurate-induced peripheral vascular lesions of AT-1015, a novel 5-HT2 receptor antagonist, were investigated. In platelet aggregation, AT-1015 selectively inhibited in vitro 5-HT2A receptor-mediated aggregation, and the activity was almost equ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200004000-00002
更新日期:2000-04-01 00:00:00
abstract::The effects of SIN-1 were studied on isolated aortic rings and perfused hindquarters of the rat and were compared with the effects of nitroglycerin and endothelium-derived relaxing factor (EDRF) released by acetylcholine or histamine (aorta) and carbachol (hindquarters). SIN-1 relaxes rat aortic rings in a dose-depend...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1989-01-01 00:00:00
abstract::Cardiac remodeling is regulated by an extensive intracellular signal transduction network. Each of the many signaling pathways in this network contributes uniquely to the control of cellular adaptation. In the last few years, it has become apparent that multimolecular signaling complexes or "signalosomes" are importan...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:10.1097/FJC.0000000000000206
更新日期:2015-03-01 00:00:00
abstract::The treatment of hypertension is clearly beneficial. Blood pressure reduction with antihypertensive drugs reduces mortality and the incidence of complications such as stroke, renal failure, and congestive failure. However, analysis of long-term studies using different antihypertensive drugs indicates that the outcome ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1985-01-01 00:00:00