[Increased thymidine excretion under the influence of polyanions]

During the first 24 hours following injection of polyanions (dextran sulphate in a dose of 62.5 mg per 1 kg of body weight; poly I. poly C in a dose of 2.5 mg per 1 kg of body weight) to rats and mongrel albino mice an increased urinary excretion of thymidine was revealed which occurred after their exposure to high X-ray doses. An increase in urinary excretion of thymidine is assumed to be due to migration of lymphocytes to the blood channel.