[Change in various properties of catalase in the small intestine of rats after vagotomy].

To evaluate the antioxidative system of the small intestine in disturbed parasympathetic innervation, the authors studied the activity of catalase, its resistance to substrate inactivation (catalytic capacity) and reduction potential (reduction of Fe3+ to Fe2+) in the enteric homogenate in different periods (on day 14 and 30) after bilateral subdiaphragmatic truncal vagotomy. Vagotomy did not change catalase activity but was attended by an increase of catalase catalytic capacity and reduction potential. It is suggested that the discovered changes of the studied parameters are manifestations of responses of the antioxidative protective system of the small intestine to the activation of lipid peroxidation.