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Pflügers Archiv

, Volume 405, Issue 1, pp 80–82 | Cite as

Appearance of adenosine triphosphate in the perfusate from working frog heart

  • T. B. Doyle
  • T. Forrester
Heart, Circulation, Respiration and Blood; Environmental and Exercise Physiology Short Communication

Abstract

Frog hearts (Rana pipiens) were perfusedin situ with Ringer's solution and the perfusate tested on firefly extract for the presence of ATP. At a normal perfusion pressure of 8 cm. H2O the rate of release of ATP into the perfusate was 8.8 (±S.E.1.7) pmoles.min−1. When the workload was increased by raising the perfusion pressure to 12 cm. H2O the rate of release increased to 28.3 (±S.E.4.8) pmoles.min−1. The rate of release was found to be proportional to the amount of workload imposed upon the heart. It is postulated that the trigger for release is hypoxia and that the release of ATP from the cardiac cell will augment contractility of the myocardium through its action upon adjacent cells via the P2 purinergic receptor.

Key words

adenosine triphosphate hypoxia frog myocardium purinergic receptor 

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Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • T. B. Doyle
    • 1
  • T. Forrester
    • 1
  1. 1.Department of PhysiologySaint Louis University Medical CenterSt. LouisUSA

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