Document Detail


ANF disappearance and tissue distribution in rats.
MedLine Citation:
PMID:  2137296     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The disappearance of [125I]atrial natriuretic factor (ANF; Ser99-Tyr126) from the circulation and its tissue distribution with or without nonlabeled ANF pretreatment were investigated in normotensive Sprague-Dawley rats. Preadministration of the cold peptide increased plasma radioactivity levels for over 8 min following labeled ANF injection but did not change the half-life of circulating labeled ANF. The metabolic clearance rate (MCR) and volume of distribution in the first, second, and steady state phase were significantly decreased after cold ANF pretreatment. Circulating iodo-labeled ANF was taken up by several organs, even by tissues such as fat or bone, but its urinary excretion was very low. The highest uptake was found in the liver (16 +/- 1% of the injected dose), lung (14 +/- 1%), and kidney (12 +/- 1%), diminishing by 21, 89, and 59%, respectively, after cold ANF preinjection. The brain radioactivity was negligible implying an inability of [125I]ANF to cross the blood-brain barrier. Our data underscore the importance of the uptake-mediated, cold ANF preadministration suppressible clearance of ANF from the circulation, probably one of its basic elimination mechanisms. The liver, lung, and kidney are probably the most important participants in the MCR of ANF.
Authors:
J Widimsky; W Debinski; O Kuchel; N T Buu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The American journal of physiology     Volume:  258     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1990 Jan 
Date Detail:
Created Date:  1990-03-05     Completed Date:  1990-03-05     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  H134-9     Citation Subset:  IM    
Affiliation:
Laboratory of the Autonomic Nervous System, Clinical Research Institute of Montreal, Hôtel-Dieu Hospital, Québec, Canada.
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MeSH Terms
Descriptor/Qualifier:
Animals
Atrial Natriuretic Factor / blood,  pharmacokinetics*,  pharmacology,  urine
Chromatography, High Pressure Liquid
Cold Temperature
Hematocrit
Iodine Radioisotopes / diagnostic use
Male
Peptide Fragments / blood,  pharmacokinetics*,  urine
Rats
Rats, Inbred Strains
Tissue Distribution
Chemical
Reg. No./Substance:
0/Iodine Radioisotopes; 0/Peptide Fragments; 85637-73-6/Atrial Natriuretic Factor

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


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