Abstract:
:Formation of oxygen free radicals during heart transplantation seems to be related to the alterations occurring during ischemia and reperfusion and could explain the short preservation time of donor hearts. The aim of our study was (a) to analyze the protective effects of pyruvate during cold cardioplegia and ischemia/reperfusion sequence, and (b) to investigate in vitro the radical scavenging properties of this compound. After 30 min of perfusion, isolated working rat hearts were arrested by cardioplegic solution, stored 4 h in B21 solutions at 4 degrees C, and reperfused with Krebs-Henseleit buffer for 45 min. Pyruvate (2 mM) was added to Krebs-Henseleit, cardioplegic, and storage solutions, and functional parameters were recorded throughout the experiments. In a second part, control hearts and hearts treated with pyruvate were cannulated via the aorta and perfused for 30 min by the Langendorff method, arrested by cardioplegic solution, stored 4 h in B21 solutions at 4 degrees C, and reperfused for 45 min by the Langendorff method. Malonedialdehyde and alpha-tocopherol levels were determined on heart homogenate. In situ detection of apoptotic cells also was performed on tissue samples (left ventricle) at the end of the ischemia/reperfusion sequence. To demonstrate in vitro the antioxidant effects of pyruvate, we monitored (a) its hydroxyl radical scavenging properties by using electron paramagnetic resonance (EPR) spectroscopy, and (b) the decrease of fluorescence of allophycocyanin, in the presence of a Fenton system (H2O2/Cu2+). Ischemia for 4 h, followed by myocardial reperfusion, resulted in substantially reduced mechanical function. Hearts subjected to this ischemia and pretreated with pyruvate showed a significant improvement in the function recovery. After the ischemia/reperfusion protocol, no significant decrease of malonedialdehyde levels was shown on hearts treated with pyruvate. However, alpha-tocopherol levels were higher in the pyruvate group compared with the control group. At the end of the reperfusion period, levels of apoptotic cells were significantly lower in hearts treated with pyruvate compared with control hearts. EPR studies showed that pyruvate was an efficient hydroxyl scavenger, with a median inhibitory concentration (IC50) of 8 mM. The allophycocyanin assay also showed a dose-dependent effect of pyruvate against hydroxyl radicals. In conclusion, these findings showed that pyruvate could prevent reperfusion injuries in the isolated heart, probably by its antioxidative properties. The application of pyruvate may contribute to the preservation of hearts for organ transplantation.
journal_name
J Cardiovasc Pharmacoljournal_title
Journal of cardiovascular pharmacologyauthors
Dobsak P,Courderot-Masuyer C,Zeller M,Vergely C,Laubriet A,Assem M,Eicher JC,Teyssier JR,Wolf JE,Rochette Ldoi
10.1097/00005344-199911000-00005subject
Has Abstractpub_date
1999-11-01 00:00:00pages
651-9issue
5eissn
0160-2446issn
1533-4023journal_volume
34pub_type
杂志文章abstract::This report summarizes the most important results of 11 studies regarding efficacy and safety of bisoprolol in patients with stable angina pectoris due to coronary heart disease. Assessments carried out 2-3 h after the administration of the beta 1-selective adrenoceptor blocking agent bisoprolol revealed that the dose...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-198511001-00029
更新日期:1986-01-01 00:00:00
abstract::Endothelin-1 (ET-1) stimulated cAMP formation in Chinese hamster ovary cells stably expressing human wild-type ET(A) (CHO/hET(A) cells) and inhibited the formation in cells expressing human wild-type ETB (CHO/hETB cells), suggesting a selective coupling of hET(A) and hETB with G alpha s and G alpha i, respectively. To...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1995-01-01 00:00:00
abstract::Angiotensin II, bradykinin, and substance P are powerful vasoconstrictors of venous smooth muscle. In this report, we have characterized the receptors and the cellular mechanisms of these vasoactive peptides on a new isolated smooth muscle preparation, the rabbit vena cava. Receptors were characterized using agonists ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199109000-00013
更新日期:1991-09-01 00:00:00
abstract::The prognosis for patients with congestive heart failure (CHF) is poor, with a mortality exceeding 50% within 5 years from diagnosis. This poor prognosis remains despite improved pharmacological therapy. Because the prevalence of sudden death among these patients is high, reported to exceed 40%, the prognostic importa...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:
更新日期:1991-01-01 00:00:00
abstract::Inhibition of angiotensin-converting enzyme (ACEI) after myocardial infarction reduces remodeling of the surviving myocardium. The cellular signaling mechanisms contributing to remodeling are not fully elucidated. Goal of the current study was to test whether protein kinase C (PKC) is regulated in the surviving myocar...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200305000-00016
更新日期:2003-05-01 00:00:00
abstract::The renin-angiotensin system affects blood pressure and regional blood flow through endocrine, paracrine, and autocrine influences. The circulating endocrine renin-angiotensin system (RAS) is activated for acute cardiovascular homeostasis. The recent demonstration of a local renin-angiotensin system in the blood vesse...
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::To evaluate the role of intracellular calcium and particularly Ca2+-uptake in the initiation of lymphocyte mitogenesis, the effect of mibefradil, which blocks both L- and T-type calcium channels with a more selective blockade of T-type channels, on the proliferation of human peripheral blood mononuclear cells (PBMCs) ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199904000-00012
更新日期:1999-04-01 00:00:00
abstract::The effects of nitrendipine, a new antihypertensive agent, have been examined using the isolated rabbit aortic strip stimulated with either noradrenaline (1.7 X 10(-8) - 1.7 X 10(-5) mol/L) or potassium (22.7-52.7 mmol/L). Nifedipine, verapamil, phentolamine, papaverine, and minoxidil were used as reference compounds....
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1982-11-01 00:00:00
abstract::The hypotensive effects of ketanserin, a selective blocker of 5-hydroxytryptamine2, are well defined, but its electrophysiologic effects in humans are not. Intravenous ketanserin (0.15 mg/kg) was therefore given to 10 patients undergoing electrophysiologic evaluation, and data were obtained before and after drug admin...
journal_title:Journal of cardiovascular pharmacology
pub_type: 临床试验,杂志文章
doi:
更新日期:1987-01-01 00:00:00
abstract::We investigated the effects of nifedipine on cyclic GMP turnover and the pertinent enzyme activities in cultured coronary smooth muscle cells (SMC). Nifedipine at high concentrations slightly decreased basal soluble guanylate cyclase activity and inhibited the action of sodium nitroprusside (SNP) but had no effect on ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199510000-00013
更新日期:1995-10-01 00:00:00
abstract:BACKGROUND:The present study has been designed to investigate the effect of sodium cromoglycate and ketotifen, mast cell stabilizers in hyperhomocysteinemia-induced cardiac hypertrophy in rats. METHODS:Rats were administered L-methionine (1.7 g/kg/day PO) for 8 weeks to produce hyperhomocysteinemia. Sodium cromoglycat...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/FJC.0b013e31817ae60f
更新日期:2008-06-01 00:00:00
abstract::The potential therapeutic value of a new prostacyclin analogue, (4z, 16s)-4,5,18,18,19,19-hexadehydro-16,20-dimethyl-delta 6(9a)- 9-(O)-methano-PGI1 (KP-10614), was studied in acute myocardial infarction in rats. Myocardial infarction was induced by ligation of the left coronary artery and ischemic injury was followed...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199210000-00017
更新日期:1992-10-01 00:00:00
abstract::Diabetic nephropathy is a major cause of end-stage renal failure and the mortality rate due to this disease is continuously progressing worldwide. The multifaceted signalling mechanisms have been identified to be involved in the pathogenesis of diabetic nephropathy. Despite the modern therapies like antidiabetics, ant...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:10.1097/FJC.0b013e3181ad2190
更新日期:2009-08-01 00:00:00
abstract::Cardiac endothelial nitric oxide synthase (ecNOS) was suppressed and inducible NOS (iNOS) enhanced at the decompensated heart failure stage in 18-week-old Dahl salt-sensitive (DS) hypertensive rats to which a high-salt diet had been administered from the age of 6 weeks. Nicorandil (NIC) enhanced ecNOS by activating Ad...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/01.fjc.0000211741.47960.c2
更新日期:2006-05-01 00:00:00
abstract::Three consecutive periods in the natural history of atherosclerosis are amenable to medical treatment. Plaque development is the main target of prevention, which also aims at slowing the progression of already existing plaques. The control of several established risk factors (high blood cholesterol, high blood pressur...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章,评审
doi:10.1097/00005344-199500252-00009
更新日期:1995-01-01 00:00:00
abstract::We isolated two candidates for endogenous digitalis-like factors from human urine based on the inhibition of [3H]ouabain binding to intact human erythrocytes. The more-polar ouabain-displacing compound-1 (ODC-1) closely resembled ouabain in biological, physicochemical, and chromatographic properties. Moreover, anti-ou...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199322002-00019
更新日期:1993-01-01 00:00:00
abstract::The cardiac electrophysiology of flecainide a new antiarrhythmic agent, was studied in open-chested dogs. At plasma concentrations of 0.4 to 0.7 microgram/ml, flecainide significantly prolonged atrioventricular (AV) conduction. At plasma concentrations greater than 6.5 micrograms/ml, flecainide caused delay throughout...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-197907000-00005
更新日期:1979-07-01 00:00:00
abstract::Kinins locally synthesized in the cardiovascular tissue are believed to contribute to the regulation of cardiovascular homeostasis by stimulating the endothelial cells to release nitric oxide, prostacyclin, or a hyperpolarizing factor via autocrine-paracrine mechanisms. This study was designed to investigate the actio...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200211000-00009
更新日期:2002-11-01 00:00:00
abstract::The antihypertensive effects and pharmacokinetic properties of lisinopril, an angiotensin-converting enzyme (ACE) inhibitor, were investigated in hypertensive patients with normal renal function (NRF, mean serum creatinine 1.0 mg/dl, n = 9) and those with impaired renal function (IRF, mean serum creatinine 1.7 mg/dl, ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199010000-00010
更新日期:1990-10-01 00:00:00
abstract::The electromechanical effects of UK-68,798 (UK), a novel class III antiarrhythmic drug, were studied in guinea pig and rat papillary muscles (PMs) and atria in vitro using conventional microelectrode technique. UK (10(-8)-10(-6) M) prolonged the action potential duration (APD) by 21-58% and effective refractory period...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199009000-00008
更新日期:1990-09-01 00:00:00
abstract::Bezafibrate, a potent hypolipidemic agent, was studied as potentially preventive in the atherosclerosis-associated vascular hyperresponsiveness to alpha-adrenoceptors agonists in rats. Contractile responses to norepinephrine (NE) were determined in isolated tail arteries of rats fed an atherogenic or a standard diet. ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199311000-00014
更新日期:1993-11-01 00:00:00
abstract::We investigated the characteristics of 125I-AII binding to rat adrenal and bovine cerebellar membranes in the presence and absence of new nonpeptide angiotensin II (AII) receptor ligands. The imidazole AII ligands, DUP753 and WL19, both produced biphasic competition curves to 125I-AII binding in rat adrenal glomerulos...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199102000-00001
更新日期:1991-02-01 00:00:00
abstract::We have studied the effect of ramipril (10 mg/kg daily by gastric gavage) on the development of neointima 2 and 14 days after injury to rat aorta with a balloon catheter. In treated animals, there was no significant inhibition of the early mitotic reaction after injury (synthesis of DNA, as reflected by aortic thymidi...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199108000-00005
更新日期:1991-08-01 00:00:00
abstract::Endothelin-1 (ET-1), endothelin-3 (ET-3), sarafotoxin 6b (SX6b), and sarafotoxin 6C (SX6c) were used as agonists, and BQ-123 (ETA-selective) and PD 142893 (ET receptor-nonselective) were used as antagonists to characterize the receptors mediating the effects of the ET/SX peptides on a variety of isolated smooth-muscle...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199322008-00032
更新日期:1993-01-01 00:00:00
abstract::Studies were undertaken to ascertain whether metoprolol, a beta 1-selective adrenergic blocking agent, could offer a limitation of myocardial injury throughout a 24-h period of coronary embolization in the dog. Regional myocardial ischaemia was induced through the use of a bead embolization technique which did not req...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:
更新日期:1984-11-01 00:00:00
abstract::Coronary arteries from animals on normal diets (ND) exhibit well-maintained responses to dilators under ischemic conditions. The reported altered metabolic requirements and K+-currents in blood vessels from hypercholesterolemic animals fed high-fat diets (HF) led us to hypothesize that under metabolically depressed co...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200404000-00004
更新日期:2004-04-01 00:00:00
abstract::A new pepstatin derivative, pepstatinyl arginine methyl ester hydrochloride (pepstatinyl-Arg-O-Me), was synthesized with the aim of increasing water solubility without altering capacity to inhibit the renin-angiotensinogen reaction. Pepstatinyl-Arg-O-Me was shown to inhibit in vitro the reaction between either rat or ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-198009000-00017
更新日期:1980-09-01 00:00:00
abstract::Few studies have addressed the possibility that brain natriuretic peptide (BNP) possesses a profile of bioactivity that is distinct from that of atrial natriuretic peptide (ANP). Accordingly, we assessed the biologic actions of BNP in the setting of maximal or near-maximal ANP-induced biologic activity. Background ANP...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-199902000-00008
更新日期:1999-02-01 00:00:00
abstract::The volatile anesthetics halothane, isoflurane, and sevoflurane depress myocardial contractility by decreasing transsarcolemmal Ca2+ influx, Ca2+ release from the sarcoplasmic reticulum, Ca2+ sensitivity of the contractile proteins, and cross-bridge performance. The aim of this study is to assess and compare the effec...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200108000-00006
更新日期:2001-08-01 00:00:00
abstract::Because the role of sodium channels in the initiation and maintenance of VF is not fully elucidated, we studied the significance of sodium channel activity in VF using sodium channel blockers. In nonischemic isolated feline hearts, the following electrophysiologic parameters were measured before and after application ...
journal_title:Journal of cardiovascular pharmacology
pub_type: 杂志文章
doi:10.1097/00005344-200012000-00015
更新日期:2000-12-01 00:00:00