[Proteolytic processes in the small intestine of rats with the intestinal form of acute radiation sickness].

It was shown that on the 3d day after total-body irradiation of rats (12 Gy), cathepsin "D" activity was increased and the processes of autolysis and proteolysis accelerated in the small intestine under the effect of trypsin. Extracts of the small intestine tissues increased the permeability of vessels. Ligation of the common bile duct lengthened the lifespan of irradiated animals and decreased the processes of proteolysis and the vessel permeability in the small intestine wall.