DETERMINATION OF THE CONTENT OF BIOORGANIC IODINE IN THE BODY OF ANIMALS RECEIVING IODINE COMPOUNDS AS COMPOSITION OF THE DIET
Authors:   Federal State Budgetary Scientific Institution Federal Center for Toxicological, Radiation and Biological Safety, Tyurin V.G. , Semenov V.G. ,   Chuvash State Agrarian University, Vagin K.N. ,   Federal State Budgetary Scientific Institution Federal Center for Toxicological, Radiation and Biological Safety, Kurbangaleev Y.M. ,   Federal State Budgetary Scientific Institution Federal Center for Toxicological, Radiation and Biological Safety, Gaynutdinov T.R. ,   Federal State Budgetary Scientific Institution Federal Center for Toxicological, Radiation and Biological Safety,   Kazan Federal University, Rakhmatullina G.I. ,   Federal State Budgetary Scientific Institution Federal Center for Toxicological, Radiation and Biological Safety, Usoltsev K.V. ,   Federal State Budgetary Scientific Institution Federal Center for Toxicological, Radiation and Biological Safety, Idrisov A.M. ,   Federal State Budgetary Scientific Institution Federal Center for Toxicological, Radiation and Biological Safety, Bagautdinov I.A. ,   OJSC Ak Bars Pestretsy, Rodionova N.V. ,   Moscow State Academy of Veterinary Medicine and Biotechnology - MVA named after K.I.Scryabin, Kapitonova Е.А. ,   Moscow State Academy of Veterinary Medicine and Biotechnology - MVA named after K.I.Scryabin
Published: February 2025

The purpose of the research was to determine the content of bioorganic iodine in the body of rabbits and cows that received iodine compounds as part of the diet. Spectrophotometric studies established that 1 month after the start of the experiments, the amount of protein-bound iodine (BPI) in the blood serum of control rabbits fed OR was (44.33±1.45) μg/dm3; in those receiving a diet with iodine deficiency, there was a decrease to (26.43±1.95) μg/dm3 (by 39.8 %), in animals of the third group receiving OR + potassium iodide, the content of BSI in the blood serum was (48. 27±1.62) µg/dm3 (increase by 9.8 %); in animals of the fourth group that received OR + biologically active additive “Laminaria – sea kale BIO (BAA), (52.55 ± 2.13) μg/dm3 (increase by 21.4 %). The results of the enzyme immunoassay showed that changes in the amount of triiodothyronine (T3) and thyroxine (T4) in the blood serum of rabbits during the experiment were similar to changes in the amount of BSI in the blood serum determined by the spectrophotometric method. In cows, as milk yield increases from the dry period to the milking period, the amount of T3 in the blood serum of cows decreases by 19.2 %, and the amount of T4, on the contrary, gradually increases by 20.6 %. The amount of BSI in the blood serum of cows, as milk yield increases from the dry period to the milking period, decreases by 15.63 % and during the milking period is at the lower limit of the physiological norm for this type of animal (the norm for dairy cows is 50 μg/dm3). When correcting iodine deficiency by adding the drug Kayod, the amount of T3 in the blood serum of cows increased by 27.8 %; T4 – by 30.3 % (P<0.01), the number of BSI – by 24.91 % compared to the control group. The concentrations of protein-bound iodine in the blood of rabbits and thyroid hormones correlate with each other, and the two methods used complement each other.