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THE AIM: to study of the dynamics of structural changes in renal parenchyma of rats exposed to long-term combined effects of thyroxine and propylthiouracilum (PTU). MATHERIAL AND METHODS – studies were performed on mongrel white male rats weighing 250-300g. Hyperthyroidism was caused by daily intragastric administration of thyroxine (T4) in amount of 50g per 100g of body weight over 30 days. On the first day of the experiment animals were divided into 2 groups. Animals of the first group (n = 25) received only T4. The rats of the second group (n = 25) were administrated propylthiouracilum and T4 daily. PTU was administered intragastric in amount of 1 mg per 100g of body weight. Kidney tissue samples were collected on the 10th, 20th and 30th days of the experiment. In addition, there were collected kidney tissue samples of the animals treated with only T4 after 20 days after cessation of hormone. Obtained tissue samples were fixed and treated by the usual method, followed by filling in paraffin. Sections were stained with hematoxylin and eosin. RESULTS – it was established that course of experimental hyperthyroidism leads to significant structural abnormalities of the renal parenchyma. Leading features of kidneys pathology at a hyperthyroidism are rough structural damages of the nephron tubular epithelium. CONCLUSIONS – combined administration in rats of thyroxin and propylthiouracilum has weakly expressed beneficial effect by limiting the development of structural damages to the renal parenchyma and clot formation.

INFLUENCE OF COMBINED INJECTION OF THYROXIN AND PROPYLTHIOURACILUM ON SCTRUCTURAL INDICATORS OF RENAL PARENCHYMA