Accelerated repletion of ATP and GTP pools in postischemic canine myocardium using a precursor of purine de novo synthesis.

Author:

Swain J L,Hines J J,Sabina R L,Holmes E W

Abstract

During ischemia, the myocardial content of the purine nucleotides ATP and GTP falls and remains depressed for hours to days. Prolonged depletion of ATP in the postischemic state is accompanied by functional and ultrastructural abnormalities. This report describes the successful use of the purine precursor 5-aminoimidazole-4-carboxamide riboside to selectively enhance the rate of repletion of the ATP and GTP pools in postischemic myocardium.

Publisher

Ovid Technologies (Wolters Kluwer Health)

Subject

Cardiology and Cardiovascular Medicine,Physiology

Reference7 articles.

1. Rapid assay of adenine nucleotides or creatine compounds in extracts of cardiac tissue by paired-ion reverse-phase high-performance liquid chromatography

2. Recovery from prolonged abnormalities of canine myocardium salvaged from ischemic necrosis by coronary reperfusion.

3. Sabina RL Kernstine KH Boyd RL Holmes EW Swain JL (in press) Metabolism of 5-aminoimidazole-4-carboxamide riboside in cardiac and skeletal muscle: Effects on purine nucleotide synthesis. J Biol Chem

4. Swain JL Sabina RL McHale PA Greenfield JC Jr Holmes EW (in press) Prolonged myocardial nucleotide depletion after brief ischemia in the open-chest dog. Am J Physiol

5. Aminoimidazole carboxamide ribonucleoside toxicity: A model for study of pyrimidine starvation

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