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Experimental revascularization of acute myocardial infarction. III: Correlation between the behaviour of the free nucleotide acid solubles and some aliphatic biogenic amines.

Free nucleotide, polyamine and nucleic acid synthesis was studied in myocardial acute ischemia and reperfusion. An early stimulation of biosynthesis of these compounds was observed during ischemia, than later, a remarkable decrease of their specific radioactivity appeared. Reperfusion experiments cause a significant increase of nucleic acids and related compound biosynthesis. The results indicate that the biochemical mechanism of myocardial protein synthesis, under our experimental conditions are not irreversibly damaged by ischemia. In fact, the reperfusion causes a remarkable recovery of nucleic acid, free nucleotide and polyamine specific radioactivity. The changes during the period of infarction and subsequent reperfusion show that polyamines play a key role in myocardial ischemia and reperfusion.