[Distribution of 3H-carminomycin in the body of mice]

Distribution of 3H-carminomycin with the specific activity of 390 mCu/g prepared by the method of isotope exchange in 3H2O was investigated on mice treated with the antibiotic administered intravenously in a dose of 2 mg/kg. It was shown that the antibiotic rapidly accumulated in the mouse tissues, mainly in the liver, kidneys, lungs and spleen. The carminomycin blood levels markedly decreased within the first 5 minutes after the drug administration and remained rather stable during the following 6 hours. The concentrations of carminomycin in the heart muscle were comparatively low. Still, at early periods they were much higher than those in the skeletal muscles. The difference disappeared by 24 hours. Carminomycin penetrated into the tissues of the brain.