Document Detail


The effect of local angiotensin converting enzyme inhibition on the action of atrial natriuretic peptide in the human forearm.
MedLine Citation:
PMID:  2542549     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
It has been suggested that angiotensin converting enzyme (ACE) may play a role in the metabolism of atrial natriuretic peptide (ANP), and that ANP may interfere with angiotensin-induced vasoconstriction. This has been investigated within the forearm vascular bed during local ANP infusion and ACE inhibition. Six normotensive volunteers were studied, each on two occasions. On both occasions, after saline infusion, volunteers were given initially a 20 min infusion of ANP at 0.1 microgram/min via the brachial artery. This was followed, after 20 min, by a second infusion of ANP at the same dose, co-infused with enalaprilat (5 micrograms/min) on one occasion, and placebo (saline) on the other (in random order). Forearm blood flow was measured using venous occlusion plethysmography with mercury-in-silastic strain gauges. Blood flow in the cannulated arm increased significantly during the first ANP infusion; by 52 +/- 15% before placebo (P less than 0.05), and by 41 +/- 8% before enalaprilat (P less than 0.005). This increase was similar with the second ANP infusion during co-infusion of either placebo (40 +/- 10%) or enalaprilat (45 +/- 11%). Enalaprilat did not affect the half-life of vasodilatation produced by ANP (t1/2 = 5 min). These studies in healthy subjects demonstrate no effect of local ACE inhibition on resting blood flow, or on the vasodilatation produced by ANP in the human forearm, and provide no evidence of a role of ACE in the metabolism of ANP in this vascular bed.
Authors:
J R Cockcroft; M J Allen; N Benjamin; D J Webb
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of human hypertension     Volume:  3     ISSN:  0950-9240     ISO Abbreviation:  J Hum Hypertens     Publication Date:  1989 Feb 
Date Detail:
Created Date:  1989-06-28     Completed Date:  1989-06-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8811625     Medline TA:  J Hum Hypertens     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  49-52     Citation Subset:  IM    
Affiliation:
Department of Clinical Pharmacology, Royal Postgraduate Medical School, London, UK.
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MeSH Terms
Descriptor/Qualifier:
Adult
Angiotensin-Converting Enzyme Inhibitors / pharmacology*
Atrial Natriuretic Factor / metabolism*
Enalapril / analogs & derivatives,  pharmacology
Enalaprilat
Forearm / blood supply*,  drug effects
Humans
Male
Regional Blood Flow / drug effects
Vasodilation / drug effects*
Chemical
Reg. No./Substance:
0/Angiotensin-Converting Enzyme Inhibitors; 75847-73-3/Enalapril; 84680-54-6/Enalaprilat; 85637-73-6/Atrial Natriuretic Factor

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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