[The enhancement of body resistance to combined exposure to immobilization and cold with thyroid hormones].

In experiments on 123 male rats have been found that the combination of immobilizing and cold (4 degrees C) stresses during 6 hours results in the formation of 4.5 gastric mucosa ulcers in every rat, marked activation of lipoperoxidation and depression of antioxidant activity of myocardium, significant increase of relative mass of adrenal glands, decrease of spleen mass and death of 80% animals accompanied by the reduction of concentration of thyroid hormones in blood serum and hypothermia (to 28 degrees C). The prestress injection of small doses of thyroidine decreased of mucosa defect rate and the number of ulcers to 2.8, made less marked the changes of relative mass of adrenal glands and spleen and the changes of concentration of thyroid hormones in blood serum, significantly limited the activation of lipoperoxidation, depression of power in antioxidant systems of myocardium, hypothermia (to 32.5 degrees C) and significantly increased the survival rate (to 70%).