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Release of Purine Nucleosides and Oxypurines from the Isolated Perfused Rat Heart

  • J. W. de Jong
  • E. Harmsen
  • P. P. de Tombe
  • E. Keijzer

Abstract

In the ischemic heart, high-energy phosphates are rapidly broken down. We studied the release of AMP catabolites from the isolated perfused rat heart which was temporarily made ischemic or anoxic. We measured the concentration of purine nucleosides and oxypurines with a novel high-pressure liquid chromatographic technique. The postischemic working heart released adenosine, inosine, hypoxanthine, and also substantial amounts of xanthine. The latter could indicate that xanthine oxidase is present in rat heart. Further evidence for the myocardial occurrence of this enzyme was obtained from experiments with hearts perfused retrogradely with allopurinol, an inhibitor of xanthine oxidase. This drug greatly enhanced the release of hypoxanthine, both during normoxic and anoxic perfusions. We conclude that xanthine oxidase could play an essential role in the myocardial breakdown of AMP catabolites.

Keywords

Xanthine Oxidase Coronary Flow Purine Nucleoside Modify Tyrode Solution Aortic Outflow Tract 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1983

Authors and Affiliations

  • J. W. de Jong
    • 1
  • E. Harmsen
    • 1
  • P. P. de Tombe
    • 1
  • E. Keijzer
    • 1
  1. 1.Cardiochemical Laboratory, ThoraxcenterErasmus University RotterdamRotterdamThe Netherlands

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