Document Detail


Ischemia-induced local release of myocardial noradrenaline.
MedLine Citation:
PMID:  2410729     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The isolated perfused rat heart, prelabelled with 3H-noradrenaline (NA), was used to examine the ischemia-induced release of myocardial NA, and to investigate to what extent reperfusion of an ischemic myocardium per se causes a release of NA. In a model of global myocardial ischemia with 90% flow reduction and the use of lactate as perfusion substrate, release of 3H-NA into the perfusate was already observed during the first 10-20 min of ischemia. The quantities of 3H-NA released increased further with increasing duration of ischemia. In another model with regional ischemia produced by left coronary artery ligation, a similar, though less marked, release of 3H-NA into the perfusate was observed during ischemia. Reperfusion after 60 min of ischemia was associated with a marked outflow of 3H-NA and 3H-NA metabolites, which was not reduced if reperfusion was performed with a Ca2+-free buffer. Furthermore, in the globally ischemic heart model, the relative amounts of 3H-NA and the various 3H-NA metabolites in the effluent remained constant during the last minute of ischemia and the first minute of reperfusion. We concluded that ischemia is associated with early local release of myocardial NA. NA can partly be trapped in the ischemic tissue and washed out during reperfusion.
Authors:
T Abrahamsson; O Almgren; L Carlsson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of cardiovascular pharmacology     Volume:  7 Suppl 5     ISSN:  0160-2446     ISO Abbreviation:  J. Cardiovasc. Pharmacol.     Publication Date:  1985  
Date Detail:
Created Date:  1985-09-06     Completed Date:  1985-09-06     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  7902492     Medline TA:  J Cardiovasc Pharmacol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  S19-22     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adenosine Triphosphate / biosynthesis
Animals
Coronary Disease / metabolism*
Glycolysis
Male
Myocardium / secretion*
Norepinephrine / secretion*
Perfusion
Rats
Rats, Inbred Strains
Tritium / diagnostic use
Chemical
Reg. No./Substance:
10028-17-8/Tritium; 51-41-2/Norepinephrine; 56-65-5/Adenosine Triphosphate

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


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