[The correlation between activity of enzymes participating in the formation and utilization of acetyl CoA in rabbit heart mitochondria in myocarditis and normal state].

Activities in rabbit heart mitochondria of acetoacetyl-CoA-thyolase, pyruvate dehydrogenase, acetyl CoA-synthetase, citrate synthase and acetyl carnitine transferase were compared. These enzymes participate in formation and utilization of acetyl-CoA. The acetoacetyl-CoA-thyolase and acetyl CoA-synthetase were shown to possess the more distinct capacity in vitro to form acetyl CoA. The co-enzyme was most efficiently utilized under these experimental conditions by the citrate synthase. The enzymes studied were localized within the mitochondria fraction in both the subfractions of soluble and membrane-bound proteins. In myocarditis a distinct decrease in activities of the acetoacetyl-CoA-thyolase and citrate synthase was observed.