Peripheral alpha 2 adrenoceptor stimulation contributes to the sympatholytic effect of guanfacine in humans.

Abstract:

:Guanfacine 3 mg was infused into six volunteers over 1 h on two occasions to investigate whether its sympatholytic effect is centrally or peripherally mediated. On one occasion, the central effects of guanfacine were blocked by prior administration of idazoxan 0.2 mg/kg i.v. (45 min preguanfacine); central alpha 2-blockade was confirmed by inhibition of the guanfacine-induced rise in plasma growth hormone. Rapid disappearance of idazoxan from the circulation prevented antagonism of peripheral alpha 2 receptor effects of guanfacine (confirmed by suppression of plasma insulin by guanfacine on both occasions). Idazoxan elevated plasma noradrenaline concentration by 0.26 +/- 0.018 ng/ml; however, guanfacine caused a similar (approximately 30%) reduction in plasma noradrenaline after both idazoxan and vehicle. Idazoxan elevated systolic and diastolic blood pressure, but no change was observed after guanfacine on either occasion. Thus, the reduction in plasma noradrenaline caused by guanfacine appears to be peripherally mediated but is not due to baroreceptor activation. This is consistent with stimulation of presynaptic alpha 2 receptors.

journal_name

J Cardiovasc Pharmacol

authors

Brown MJ,Struthers AD,di Silvio L

doi

10.1097/00005344-198500076-00027

subject

Has Abstract

pub_date

1985-01-01 00:00:00

pages

S159-61

eissn

0160-2446

issn

1533-4023

journal_volume

7 Suppl 6

pub_type

临床试验,杂志文章,随机对照试验
  • Effects of exercise and other nonpharmacological measures on blood pressure and cardiac hypertrophy.

    abstract::Reversal of left ventricular hypertrophy (LVH) is an important target of antihypertensive therapy. Nonpharmacological approaches such as weight reduction and exercise training have favorable effects on other risk factors. However, there are few data on their effects on LVH. Athletes have eccentric rather than concentr...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:10.1097/00005344-199117002-00015

    authors: Jennings G,Dart A,Meredith I,Korner P,Laufer E,Dewar E

    更新日期:1991-01-01 00:00:00

  • Contribution of spinal dopamine receptors to the hypotensive action of bromocriptine in rats.

    abstract::Bromocriptine, a dopamine (DA) receptor agonist, has been reported to have hypotensive effects in anesthetized and conscious normotensive rats but its mechanism of action is still not fully understood. Therefore, we studied the changes in mean arterial blood pressure (MAP) and heart rate (HR) elicited by an intravenou...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199109000-00003

    authors: Lahlou S,Demenge P

    更新日期:1991-09-01 00:00:00

  • Protection of myocardial function and coronary vasculature by streptokinase.

    abstract::Coronary artery reperfusion established by thrombolytic agents early in the evolution of an acute myocardial infarction is known to result in the salvage of otherwise jeopardized heart muscle. Recently, experimental evidence has suggested that reactive products of oxygen are formed as a result of reperfusion and can i...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-198808000-00009

    authors: Mickelson JK,Simpson PJ,Jackson CV,Lucchesi BR

    更新日期:1988-08-01 00:00:00

  • Effect of hydrogen sulfide in a porcine model of myocardial ischemia-reperfusion: comparison of different administration regimens and characterization of the cellular mechanisms of protection.

    abstract:OBJECTIVE:We investigate the impact of different regimens of parenteral hydrogen sulfide (H2S) administration on myocardium during ischemia-reperfusion (IR) and the molecular pathways involved in its cytoprotective effects. METHODS:Eighteen male Yorkshire pigs underwent 60 minutes of mid-left anterior descending coron...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/FJC.0b013e3181b2b72b

    authors: Osipov RM,Robich MP,Feng J,Liu Y,Clements RT,Glazer HP,Sodha NR,Szabo C,Bianchi C,Sellke FW

    更新日期:2009-10-01 00:00:00

  • Clinical pharmacokinetics of intravenous and oral bretylium tosylate in survivors of ventricular tachycardia or fibrillation: clinical application of a new assay for bretylium.

    abstract::We studied 12 patients receiving either chronic oral (p.o.) maintenance bretylium and/or acute intravenous (i.v.) bretylium to evaluate drug efficacy and pharmacokinetics. All patients were survivors of ventricular tachycardia or fibrillation. A new assay for bretylium was applied, and it proved sensitive and reliable...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-198105000-00008

    authors: Anderson JL,Patterson E,Wagner JG,Johnson TA,Lucchesi BR,Pitt B

    更新日期:1981-05-01 00:00:00

  • Systemic and regional hemodynamic effects of perindopril in congestive heart failure.

    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

    authors: Thuillez C,Richard C,Loueslati H,Auzepy P,Giudicelli JF

    更新日期:1990-04-01 00:00:00

  • Atherosclerosis in systemic lupus erythematosus.

    abstract::Accelerated atherosclerosis and its long-term sequelae are a major cause of late mortality among patients with systemic lupus erythematosus (SLE). Traditional Framingham risk factors such as hypertension, hypercholesterolemia, diabetes, and smoking do not account in entirety for this risk. SLE specific factors like di...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:10.1097/FJC.0b013e31829dd857

    authors: Stojan G,Petri M

    更新日期:2013-09-01 00:00:00

  • Calcium antagonist properties of diclofurime isomers. II. Molecular aspects: allosteric interactions with dihydropyridine recognition sites.

    abstract::Trans-diclofurime has been shown to be a very potent class II calcium antagonist (see preceding report), and we have examined its molecular interactions with the different receptor sites at the Ca2+ channel. Trans-diclofurime did not affect [3H]nitrendipine binding to rat cortical membranes at 37 degrees C and showed ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-198704000-00012

    authors: Mir AK,Spedding M

    更新日期:1987-04-01 00:00:00

  • Characterization of receptors for endothelins in the guinea pig mesenteric vasculature.

    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:

    authors: Berthiaume N,Claing A,Yano M,D'Orléans-Juste P

    更新日期:1995-01-01 00:00:00

  • Vasoactive peptides and growth factors in the pathophysiology of hypertension.

    abstract::A hallmark of vascular disease is the inappropriate proliferative and synthetic behavior of smooth muscle cells. This phenotypically immature behavior arises as a consequence of the myocytes undergoing conversion from a contractile to proliferative/secretory cell type. The stimulus invoked for this dedifferentiative p...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:

    authors: Scott-Burden T,Hahn AW,Bühler FR,Resink TJ

    更新日期:1992-01-01 00:00:00

  • Toll-like receptor 4 inhibitor TAK-242 treatment does not influence perfusion recovery in tissue ischemia.

    abstract::Toll-like receptors (TLRs) are important in innate immune responses, which are crucial in collateral artery formation (arteriogenesis). TLR4⁻/⁻ mice undergoing hind limb ischemia show decreased perfusion recovery accompanied by an impaired infiltration of inflammatory cells. TLR antagonists are currently developed and...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/FJC.0000000000000019

    authors: van den Borne P,Bastiaansen AJ,de Vries MR,Quax PH,Hoefer IE,Pasterkamp G

    更新日期:2014-01-01 00:00:00

  • Salusins protect neonatal rat cardiomyocytes from serum deprivation-induced cell death through upregulation of GRP78.

    abstract::Salusin-alpha and salusin-beta are newly identified bioactive peptides with hemodynamic and mitogenic activities. Recent studies have shown that salusins improve calcium uptake and protein synthesis in neonatal rat cardiomyocytes, suggesting that salusins may be regulatory factors for myocardial growth and hypertrophy...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/01.fjc.0000242059.89430.ac

    authors: Xiao-Hong Y,Li L,Yan-Xia P,Hong L,Wei-Fang R,Yan L,An-Jing R,Chao-Shu T,Wen-Jun Y

    更新日期:2006-08-01 00:00:00

  • Cardiac electrophysiologic effects of intravenous ketanserin in humans.

    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:

    authors: Nademanee K,Lockhart E,Pruitt C,Singh BN

    更新日期:1987-01-01 00:00:00

  • Metabolic disorders and oxidative stress programming in offspring of rats fed a high-fat diet during lactation: effects of a vinifera grape skin (ACH09) extract.

    abstract::This study examined the effect of Vitis vinifera grape skin ACH09 extract (ACH09) on metabolic disorders and oxidative stress in adult offspring of rats fed a high-fat diet (HF) during lactation. Four groups of female rats were fed: control diet (7% fat); ACH09 (7% fat + 200 mg·kg·d ACH09 orally); HF (24% fat); HF+ AC...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/FJC.0b013e3182244a51

    authors: Emiliano AF,de Cavalho LC,da Silva Cristino Cordeiro V,da Costa CA,de Oliveira PB,Queiroz EF,Col Moreira DD,Boaventura GT,de Moura RS,Resende AC

    更新日期:2011-09-01 00:00:00

  • Beta-blocker effects on plasma lipids in antihypertensive therapy: importance of the duration of treatment and the lipid status before treatment.

    abstract::The aim of this study was to evaluate the effects of long-term monotherapy with four beta-blockers provided with different pharmacological properties on plasma lipids in both normocholesterolemic and hypercholesterolemic hypertensive patients. After a 1-month run-in period on placebo, 70 hypertensive patients with bas...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:

    authors: Fogari R,Zoppi A,Tettamanti F,Poletti L,Lazzari P,Pasotti C,Corradi L

    更新日期:1990-01-01 00:00:00

  • Postexercise reflex control of forearm vascular resistance during calcium antagonism with slow-release oral isradipine.

    abstract::In untreated hypertensive patients, blood pressure is decreased during the hours that follow a single bout of exercise, but the mechanisms involved are as yet unknown. As antihypertensive chemotherapy may interfere with cardiovascular regulation, we investigated the effects of calcium antagonism with isradipine (slow-...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:

    authors: Cléroux J,Kouamé N,Yardley C,Marshall A,Lacourcière Y

    更新日期:1992-01-01 00:00:00

  • Endothelin-1 acts in cerebral arteries from the adventitial but not from the luminal side.

    abstract::The in vivo vasoconstrictor effect of endothelin-1 (ET-1) was investigated on feline and canine basilar arteries. The basilar artery caliber was angiographically measured after either vertebral artery perfusion or cisternal injection of the peptide. In both cats and dogs, ET-1 (5-500 pmol) induced a dose-dependent bas...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-198900135-00047

    authors: Shigeno T,Mima T,Takakura K,Yanagisawa M,Saito A,Goto K,Masaki T

    更新日期:1989-01-01 00:00:00

  • Pharmacological characteristics of beta blockers and their role in clinical practice.

    abstract::Since beta-adrenoceptor blocking drugs were originally discovered and shown to be important therapeutic agents in the management of both angina pectoris and hypertension, many other similar drugs have become available. These share the common property of beta-adrenoceptor antagonism, though they may vary in terms of po...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:10.1097/00005344-198608006-00002

    authors: McDevitt DG

    更新日期:1986-01-01 00:00:00

  • Effects of captopril on limiting infarct size in conscious dogs.

    abstract::The effects of angiotensin-converting enzyme inhibitor captopril on infarct size and cardiovascular hemodynamics were studied in 35 conscious dogs subjected to 24 h of coronary occlusion. Following occlusion of the left anterior descending coronary artery, 10 dogs were infused with captopril 0.25 mg/kg/h i.v. (group 1...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:

    authors: Daniell HB,Carson RR,Ballard KD,Thomas GR,Privitera PJ

    更新日期:1984-11-01 00:00:00

  • Effect of amlodipine on left ventricular mass in the Amlodipine Cardiovascular Community Trial.

    abstract::As part of the Amlodipine Cardiovascular Community Trial (ACCT), which was a large multicenter study designed to assess the effects of the calcium channel blocker amlodipine besylate (Norvasc) as monotherapy for treatment of mild to moderate hypertension, we sought to determine the effects of amlodipine on regression ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 临床试验,杂志文章,多中心研究

    doi:10.1097/00005344-199509000-00018

    authors: Kloner RA,Sowers JR,DiBona GF,Gaffney M,Wein M

    更新日期:1995-09-01 00:00:00

  • Effects of converting enzyme inhibitors on coronary flow and myocardial ischemia.

    abstract::The regulation of coronary hemodynamics is a complex process. One important factor that interferes with the regulation of coronary tone is the pathophysiological state of the vessels: stimuli that in normal vessels provoke no or only a slight vasoconstriction may cause a severe vasoconstriction in diseased vessels. Th...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:

    authors: van Gilst WH,Tio RA,van Wijngaarden J,de Graeff PA,Wesseling H

    更新日期:1992-01-01 00:00:00

  • Lack of second messenger function of cyclic GMP in acetylcholine-induced negative inotropism.

    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

    authors: Groschner K,Holzmann S,Kukovetz WR

    更新日期:1986-11-01 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

  • Recent developments in the pharmacology and pharmacokinetics of indoramin.

    abstract::Some recent studies complementing earlier reports on the pharmacology and pharmacokinetics of indoramin are briefly reviewed. Competitive blockade of peripheral postsynaptic alpha 1-adrenoceptors is confirmed as the primary mechanism for the antihypertensive activity of indoramin. Various reasons have been proposed to...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 临床试验,杂志文章

    doi:10.1097/00005344-198600082-00004

    authors: Archibald JL

    更新日期:1986-01-01 00:00:00

  • Paradoxical effects of fenofibrate and nicotinic acid in apo E-deficient mice.

    abstract::Atherosclerosis is a complex vascular disease initiated by abnormal accumulation of plasma lipoproteins in the subendothelial space. Elevated levels of plasma triglycerides (TG) and low-density lipoprotein (LDL)-cholesterol as well as low concentrations of high-density lipoprotein (HDL) play a causal role in the devel...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/01.fjc.0000162764.12309.25

    authors: Declercq V,Yeganeh B,Moshtaghi-Kashanian GR,Khademi H,Bahadori B,Moghadasian MH

    更新日期:2005-07-01 00:00:00

  • The pharmacokinetics of ramipril in a group of ten elderly patients with essential hypertension.

    abstract::This open, general practice study looked at the pharmacokinetics of ramipril over a period of 1 year in elderly (greater than 65 years) hypertensive patients. Ten patients with a diastolic blood pressure between 95 and 125 mm Hg were treated with 5 mg of ramipril daily for 4 weeks, followed by an additional 11 months ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:

    authors: Hosie J,Meredith P

    更新日期:1991-01-01 00:00:00

  • Further evidence of the presence of constitutive and inducible nitric oxide synthase isoforms in human platelets.

    abstract::Previous studies have suggested the presence of nitric oxide synthase (NOS) enzyme in human platelets. We herein provide definitive evidence for the presence of both endothelial constitutive NOS (ecNOS) and inducible NOS (iNOS) isoforms and their mRNA in human platelets. Total RNA was isolated from human platelets, an...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:10.1097/00005344-199601000-00024

    authors: Chen LY,Mehta JL

    更新日期:1996-01-01 00:00:00

  • Cultured vascular smooth muscle cells: an in vitro system for study of alpha-adrenergic receptor coupling and regulation.

    abstract::Cultured vascular smooth muscle cells derived by enzymatic dissociation of rabbit aortic media were used for study of alpha 1-adrenergic receptors (AAR) and receptor-coupled calcium flux. AAR were characterized by binding of the alpha 1-selective radioligand [3H]prazosin, and norepinephrine-stimulated 45calcium efflux...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章

    doi:

    authors: Colucci WS,Brock TA,Atkinson WJ,Alexander RW,Gimbrone MA Jr

    更新日期:1985-01-01 00:00:00

  • Amylin-induced relaxation of the perfused mesenteric arterial bed: meditation by calcitonin gene-related peptide receptors.

    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

    authors: Westfall TC,Curfman-Falvey M

    更新日期:1995-12-01 00:00:00

  • The future of calcium channel blocker therapy in diabetes mellitus.

    abstract::Diabetes mellitus is associated with significant morbidity and mortality caused by the micro- and macro-vascular complications that all too frequently develop during the lifetime of the diabetic patient. In attempts to treat the complications of diabetes, several different treatment strategies have been investigated. ...

    journal_title:Journal of cardiovascular pharmacology

    pub_type: 杂志文章,评审

    doi:

    authors: Savage S,Miller LA,Schrier RW

    更新日期:1991-01-01 00:00:00