[Hormonal regulation of the function of the myocyte intracellular membranes under radiation influence].

It was shown that the experimental hypofunction of thyroid, induced by thyroidectomy and strong gamma-irradiation with a dose of 1 Gy lead to disturbance of function and structure of membranes of sarcoplasmic reticulum of myocites in rats. Introduction in vivo of L-thyroxine rose functional capacity of membranes with insignificaut changes in their lipid bilayer.

[Dynamics of changes in the concentration of thyroid hormones in in rat blood after subtotal thyroidectomy, internal, or external irradiation].

Thyroidectomy or administration of high activities (> 1.1 Mbq) of 131I to rats causes initial decrease in blood concentration of thyroid hormones which returns to the normal level. Administration of lower doses (< 1.

[Dynamics of thyroxine and triiodothyronine concentration in the rat blood at early times after subtotal removal of the thyroid gland or under effects of different I-131 action].

The alterations of amount of thyroid hormones have the characteristic dynamics that manifest itself by initial reduction with following partial or complete restoration of T3 and T4 concentration in rat blood after surgical or radioactive injuries of thyroid gland. Through presence of threshold of several dozens Gy for early dose-dependent hypothyroidism, the thyroid gland seems to be relatively radioresistant organ. Thyroid hormones concentration in blood has restored to normal level after experimental injuries which shows high restoration potential of thyroid gland function.