Increase in the hypotensive effect of bromocriptine induced by spinal transection in rats: contribution of spinal dopamine receptors.

Abstract:

:Intravenous (i.v.) administration of bromocriptine (150 micrograms/kg) in conscious normotensive rats with chronic spinal cord transection (at T5-T7), pretreated or not with i.v. propranolol (0.5 mg/kg), induced significant decreases in mean arterial blood pressure (MAP) which were greater and longer lasting than those in intact rats (-15 to -20 as compared with -10 mm Hg) for 8 days after transection. To assess the spinal and/or peripheral origin of this phenomenon, rats were also pretreated with either i.v. (0.3 mg/kg) or intrathecal (i.t.; 93 nmol/rat; at T9-T10) administration of domperidone, a selective dopamine (DA)2 receptor antagonist incapable of crossing the blood-brain barrier (BBB) freely. The increase in hypotension induced by spinal section was suppressed by i.t. but not by i.v. domperidone. In intact rats, bromocriptine elicited an increase in heart rate (HR; approximately 50 beats/min more), which was prevented by i.v. propranolol treatment. In spinal cord-transected rats, however, it had a significant bradycardic effect (approximately 50 beats/min less), which was antagonized by i.t.-administered domperidone. These results suggest that enhancement of the hypotensive effects induced by systemic administration of bromocriptine after a complete thoracic spinal transection is fully mediated by spinal DA2 receptors. This finding may help explain the increased orthostatic hypotension induced by DA receptor agonists in Parkinsonian patients with spinal lesions.

journal_name

J Cardiovasc Pharmacol

authors

Lahlou S,Demenge P

subject

Has Abstract

pub_date

1992-05-01 00:00:00

pages

723-31

issue

5

eissn

0160-2446

issn

1533-4023

journal_volume

19

pub_type

杂志文章
  • Modulation of renal oxygen consumption by nitric oxide is impaired after development of congestive heart failure in dogs.

    abstract::We investigated the role of nitric oxide (NO) in the modulation of renal O2 consumption in dogs with pacing-induced congestive heart failure (CHF). O2 consumption in the renal cortex (C) and medulla (M) of normal dogs and dogs with CHF was measured under control conditions and in the presence of increasing concentrati...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-200103000-00008

    authors: Adler S,Huang H,Loke K,Xu X,Laumas A,Hintze TH

    更新日期:2001-03-01 00:00:00

  • Creatine phosphate suppresses ventricular arrhythmias resulting from coronary artery ligation.

    abstract::The effects of various doses of creatine phosphate have been examined in a rat model of acute myocardial ischaemia. When given directly into the lumen of the left ventricle in pentobarbitone-anaesthetised male rats, creatine phosphate (50 and 100 mg/kg) markedly reduced the incidence of ventricular ectopic beats, and ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-198201000-00009

    authors: Fagbemi O,Kane KA,Parratt JR

    更新日期:1982-01-01 00:00:00

  • Electrophysiologic and blood-flow responses in the endocardium and epicardium to disopyramide and MS-551 during myocardial ischemia in the dog.

    abstract::The aim of this study was to determine whether a quantitative relation exists between changes in regional myocardial blood flow (RMBF) and those in electrophysiologic determinants recorded via left ventricular endocardial and epicardial bipolar electrograms after administration of disopyramide (DP) and a class III ant...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199908000-00014

    authors: Tanabe T,Iwamoto T,Iwata O,Aikawa M,Kusuzaki S,Handa S,Shinozaki Y,Mori H

    更新日期:1999-08-01 00:00:00

  • Angiotensin converting enzyme inhibition does not prevent the natriuretic effect of felodipine.

    abstract::The mechanism of natriuresis with calcium entry blockers such as felodipine is largely unexplained. As these drugs prevent sodium retention following exogenous angiotensin II, the natriuretic effect of felodipine might be due to a similar interaction with endogenous angiotensin II. In such a case, angiotensin converti...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1097/00005344-199303000-00018

    authors: van Hamersvelt HW,Wetzels JF,Kloke HJ,Koene RA,Huysmans FT

    更新日期:1993-03-01 00:00:00

  • Endothelin 1 and thrombin synergistically stimulate IL-6 mRNA expression and protein production in human umbilical vein endothelial cells.

    abstract::We investigated the effects of endothelin (ET) and thrombin on the production of interleukin 6 (IL-6) in human umbilical vein endothelial cells (HUVECs). ET-1 increased IL-6 production twofold in HUVECs incubated for 18 h with 10(-10) M ET-1. Thrombin also significantly increased IL-6 production. However, stimulation ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:

    authors: Stanková J,Rola-Pleszczynski M,D'Orléans-Juste P

    更新日期:1995-01-01 00:00:00

  • Hypertension and the development of heart failure.

    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

    authors: de Leeuw PW,Kroon AA

    更新日期:1998-01-01 00:00:00

  • AT-1015, a novel serotonin (5-HT)2 receptor antagonist, blocks vascular and platelet 5-HT2A receptors and prevents the laurate-induced peripheral vascular lesion in rats.

    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

    authors: Kihara H,Hirose K,Koganei H,Sasaki N,Yamamoto H,Kimura A,Nishimori T,Shoji M,Yoshimoto R

    更新日期:2000-04-01 00:00:00

  • Therapeutic considerations in applying rate control therapy for atrial fibrillation.

    abstract::The therapeutic strategy of heart rate control for atrial fibrillation (AF) is undergoing a renaissance since several recent randomized trials demonstrated clear advantages over the rhythm control for many patients. Heart rate control for AF is hampered, however, by a dearth of information relating target heart rates ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:10.1097/FJC.0b013e31816d5f49

    authors: Wyse DG

    更新日期:2008-07-01 00:00:00

  • Myocardial protection afforded by nicorandil and ischaemic preconditioning in a rabbit infarct model in vivo.

    abstract::We previously showed that preoperative nicorandil, a hybrid potassium channel opener and nitrate compound, conferred cardioprotective effects in a hypoxia/reoxygenation model of isolated human atrial muscle by using functional recovery as an end point, and that ischaemic preconditioning surprisingly abolished the prot...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199801000-00011

    authors: Imagawa J,Baxter GF,Yellon DM

    更新日期:1998-01-01 00:00:00

  • Endogenous prostaglandins limit angiotensin-II induced regional vasoconstriction in conscious rats.

    abstract::In conscious rats, we tested the hypothesis that prostaglandins attenuate regional vasoconstriction caused by acute infusion of angiotensin II. Mean arterial pressure, regional blood flow, and vascular conductance in response to 2-minute infusions of 0.05 or 1 microg/kg/min Ang II were assessed before and during indom...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-200307000-00002

    authors: Stebbins CL,Symons JD,Hageman KS,Musch TI

    更新日期:2003-07-01 00:00:00

  • Coronary collateral blood flow in acute myocardial ischemia is not increased by dihydropyridine-induced coronary vasodilatation.

    abstract::The effect of two dihydropyridine derivatives, nifedipine and felodipine, on myocardial blood flow distribution 1 h after ligation of the left anterior descending coronary artery (LAD) was studied in open-chest dogs by means of radioactive microspheres. The myocardium normally perfused from the LAD was first labeled w...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-198507000-00003

    authors: Sjöquist PO,Duker G,Almgren O

    更新日期:1985-07-01 00:00:00

  • Racial differences in beta-adrenoceptor-mediated responsiveness.

    abstract::Previous studies have suggested that racial differences may exist in beta-adrenoceptor-mediated responsiveness. However, no clear conclusions can be drawn based on these studies because of the confounding effect of the parasympathetic nervous system on responses to isoproterenol bolus doses. In this study, we blocked ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 临床试验,杂志文章

    doi:10.1097/00005344-199501000-00015

    authors: Johnson JA,Burlew BS,Stiles RN

    更新日期:1995-01-01 00:00:00

  • Reduction of reperfusion arrhythmias in the ischemic isolated rat heart by angiotensin converting enzyme inhibitors: a comparison of captopril, enalapril, and HOE 498.

    abstract::The effects of the angiotensin converting enzyme (ACE) inhibitors captopril, enalapril, HOE 498, and its prodrug on reperfusion arrhythmias after 15 min of coronary ligation were investigated in the isolated rat heart. Drug concentrations were equipotent in their effect on angiotensin I pressor response. Furthermore, ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:

    authors: van Gilst WH,de Graeff PA,Wesseling H,de Langen CD

    更新日期:1986-07-01 00:00:00

  • Prazosin first-pass metabolism and hepatic extraction in the dog.

    abstract::The short half-life, low plasma concentrations, and extensive biotransformation of prazosin suggest that it might be subject to extensive first-pass metabolism. Bioavailability, disposition, and hepatic extraction were studied in the dog. In conscious dogs whole blood prazosin concentrations were measured after oral a...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-197911000-00005

    authors: Rubin P,Yee YG,Anderson M,Blaschke T

    更新日期:1979-11-01 00:00:00

  • Estrogen receptor-mediated vascular responsiveness to nebivolol: a novel endothelium-related mechanism of therapeutic vasorelaxation.

    abstract::Nebivolol is a highly selective and lipophilic beta1-adrenergic receptor antagonist with vasodilating characteristics attributed mainly to endothelial generation of nitric oxide (NO). Coincidently, rapid vascular vasodilating effects of estradiol are also widely reported and membrane-initiated signaling by estrogen re...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-200405000-00005

    authors: Garbán HJ,Buga GM,Ignarro LJ

    更新日期:2004-05-01 00:00:00

  • Anti-ischemic compound KC 12291 prevents diastolic contracture in isolated atria by blockade of voltage-gated sodium channels.

    abstract::Several lines of evidence support a fundamental role for voltage-gated sodium channels in mediating ischemic Na rise. We examined the effect of the novel anti-ischemic compound KC 12291 on veratridine-stimulated and lysophosphatidylcholine (LPC)-induced sustained sodium current (I(NAL)) mediated by sodium channels in ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-200209000-00003

    authors: Tamareille S,Le Grand B,John GW,Feuvray D,Coulombe A

    更新日期:2002-09-01 00:00:00

  • Altered intra- and extraluminal effects of 5-hydroxytryptamine in hypertensive mesenteric resistance arteries: contribution of the endothelium and smooth muscle.

    abstract::Vasoconstrictor responses to intraluminal and extraluminal 5-hydroxytryptamine (5-HT) were studied in isolated mesenteric resistance arteries of Wistar-Kyoto (WKY) rats and spontaneously hypertensive rats (SHRs). Third-order branches of mesenteric arteries were dissected free and mounted on glass cannulae in organ cha...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199108000-00015

    authors: Dohi Y,Lüscher TF

    更新日期:1991-08-01 00:00:00

  • Asynchronism of the recovery of baroreflex sensitivity, blood pressure, and consciousness from anesthesia in rats.

    abstract::Anesthesia inhibits arterial baroreflex functions such as baroreflex sensitivity (BRS). The main objective of the present study was to determine the time course of BRS recovery from anesthesia and to determine whether BRS recovery is synchronous with the recovery of consciousness and blood pressure (BP). Experiments w...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-200401000-00001

    authors: Yi-Ming W,Shu H,Miao CY,Shen FM,Jiang YY,Su DF

    更新日期:2004-01-01 00:00:00

  • Effect of clentiazem (TA-3090) with posttreatment on neurologic and histologic disorders of stroke-prone spontaneously hypertensive rats with history of stroke.

    abstract::After stroke-prone spontaneously hypertensive rats (SHRSP) received a salt-loaded diet to accelerate onset of stroke, the therapeutic effect of clentiazem, a benzothiazepine Ca antagonist, on neurologic and histologic disorders was examined. Treatment with clentiazem (3, 15, and 30 mg/kg) orally twice daily (b.i.d.) f...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199401000-00023

    authors: Kikkawa K,Murata S,Kurosawa H,Toriumi W,Iwasaki H,Nagao T

    更新日期:1994-01-01 00:00:00

  • Endothelin ETA- and ETB-receptor-mediated vasoconstriction in rat pulmonary arteries and arterioles.

    abstract::We investigated the endothelin (ET) receptors involved in the vasoconstrictor responses to ET-1 in rat pulmonary arteries and arterioles and the effect of endothelium removal, nitric oxide (NO) synthase inhibition, and hypoxia on ET-1-induced responses in the arteries. In isolated rat pulmonary artery rings (2-3 mm ID...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199405000-00022

    authors: MacLean MR,McCulloch KM,Baird M

    更新日期:1994-05-01 00:00:00

  • Improvement of EDHF by chronic ACE inhibition declines rapidly after withdrawal in rats with myocardial infarction.

    abstract::Heart failure after myocardial infarction (MI) is associated with endothelial dysfunction. There is conflicting evidence on the exact nature of this endothelial dysfunction and how endothelium-dependent vasodilation is affected by angiotensin-converting enzyme inhibitor (ACE-I) therapy. Furthermore, consequences of ac...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/01.fjc.0000187175.05780.e2

    authors: Westendorp B,Schoemaker RG,van Gilst WH,Buikema H

    更新日期:2005-12-01 00:00:00

  • A comparison of plasma, white blood cell, red blood cell, and tissue distribution of amiodarone and desethylamiodarone in anesthetized dogs.

    abstract::Desethylamiodarone (DA) is a major metabolite of amiodarone (AM), a Class III antiarrhythmic drug. The plasma pharmacokinetics and tissue distribution of AM and DA (10 mg/kg i.v.) were compared in anesthetized dogs. Plasma, white blood cell (WBC), red blood cell (RBC), liver, and skeletal muscle samples were obtained ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-198710000-00002

    authors: Bandyopadhyay S,Somani P

    更新日期:1987-10-01 00:00:00

  • The effects of age on the pharmacodynamics and pharmacokinetics of two formulations of verapamil.

    abstract::The present study, undertaken in general practice, was designed to evaluate the effects of age on the pharmacodynamics and pharmacokinetics of a conventional and a slow-release formulation (Securon SR) of verapamil. Two groups of 12 patients with essential hypertension were treated in an open, randomized, crossover st...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1097/00005344-198900134-00017

    authors: Hosie J,Hosie G,Meredith PA

    更新日期:1989-01-01 00:00:00

  • Potential of the Cardiovascular Drug Levosimendan in the Management of Amyotrophic Lateral Sclerosis: An Overview of a Working Hypothesis.

    abstract::Levosimendan is a calcium sensitizer that promotes myocyte contractility through its calcium-dependent interaction with cardiac troponin C. Administered intravenously, it has been used for nearly 2 decades to treat acute and advanced heart failure and to support the heart function in various therapy settings character...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:10.1097/FJC.0000000000000728

    authors: Al-Chalabi A,Heunks LMA,Papp Z,Pollesello P

    更新日期:2019-11-01 00:00:00

  • Chronic treatment after acute myocardial infarction: which drug for which patient? Nitrates.

    abstract::Nitrates are beneficial in post-myocardial infarction patients with stable, unstable, and Prinzmetal's variant angina and as adjunctive therapy in congestive heart failure. They are available in multiple formulations that differ in chemical structure, pharmacokinetics, onset and duration of activity, and peak effect; ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:

    authors: Scardi S

    更新日期:1989-01-01 00:00:00

  • Growth control and morphogenesis in the development and pathology of arteries.

    abstract::We briefly review and compare the current knowledge of growth mechanisms for the mitogenic response of endothelial cells and smooth-muscle cells to injury. For the endothelium, this focuses on the evidence that growth control involves two components: an endogenous inhibition mechanism, which can be overcome either by ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:10.1097/00005344-199321001-00007

    authors: Schwartz SM,Liaw L

    更新日期:1993-01-01 00:00:00

  • Pharmacologic Prevention of Myocardial Ischemia-Reperfusion Injury in Patients with Acute Coronary Syndrome Undergoing Percutaneous Coronary Intervention.

    abstract:ABSTRACT:Establishing efficient perfusion into the myocardium is the main purpose in patients with acute coronary syndrome, but the process of reperfusion is not without risk and can damage the myocardium paradoxically. Unfortunately, there is no effective treatment for reperfusion injury, and efforts to find an effici...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/FJC.0000000000000980

    authors: Kakavand H,Aghakouchakzadeh M,Coons J,Talasaz AH

    更新日期:2021-01-04 00:00:00

  • Flunarizine in migraine attack.

    abstract::The usual drugs for migraine attacks carry risks of increased frequency, resistance to other treatment, drug dependency, and abuse. Ergotamines may also be vascular risk factors. Alternative drugs without these risks would be useful. Flunarizine could be an alternative. Migraine cannot be reduced to molecular pathophy...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:

    authors: Isler H

    更新日期:1991-01-01 00:00:00

  • Effects of early and late therapy with perindopril on survival and myocardial inotropic state in experimental dilated cardiomyopathy.

    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

    authors: Chemla D,Scalbert E,Desché P,Lerebours G,Suard I,Lecarpentier Y

    更新日期:1994-07-01 00:00:00

  • Types and functions of peripheral alpha-adrenoceptors.

    abstract::Both in the periphery and in the central nervous system, alpha-adrenoceptors can be subdivided into alpha 1-types. alpha 1-Receptors are sensitive to low concentrations of the agonists phenylephrine and methoxamine, and of the antagonists corynanthine and prazosin. alpha 1-Receptors are sensitive to low concentrations...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-198200041-00002

    authors: Starke K,Docherty JR

    更新日期:1982-01-01 00:00:00