Academic
Publications
Serum Triiodothyronine (T3) and Thyroxin (T4) Concentrations in Lipizzan Horses

Serum Triiodothyronine (T3) and Thyroxin (T4) Concentrations in Lipizzan Horses,N. âEBULJ-KADUNC,M. KOSEC,V. CESTNIK

Serum Triiodothyronine (T3) and Thyroxin (T4) Concentrations in Lipizzan Horses   (Citations: 1)
BibTex | RIS | RefWorks Download
âebulj-Kadunc N., M. Kosec, V. Cestnik: Serum Triiodothyronine (T3) and Thyroxin (T4) Concentrations in Lipizzan Horses. Acta Vet. Brno 2003, 72: 17-22. The Lipizzan horses are a breed with a long breeding history that may have developed differences to other breeds in thyroid hormone concentrations. The objectives of this study were to determine the influences of age, sex and pregnancy on total serum triiodothyronine (T3) and thyroxin (T4) levels in Lipizzans and to compare the results with reference values of other horse breeds. T3 and T4 concentrations were determined in blood serum of 131 stallions, 118 mares and 25 foals of the Lipizzan breed by using a radioimmunoassay (RIA), validated for horse serum. The highest thyroid hormone levels were found in foals. The lowest serum T4 values were obtained in animals aged 16 years and more, the lowest T3 values in the range of 1 to 3 years. At 4 years, T3 concentrations rose and then steadily declined. In all categories of horses, significantly higher serum T4 was found in males, but the sex dependent differences of T3 were less evident. T3 and T4 values in pregnant mares were significantly lower (P < 0.01) than in non-pregnant ones and in stallions. In contrast to the data in the literature, a significant decrease of T4 was observed between the 7th and 10th month of pregnancy, while T3 remained almost unchanged. The mean total serum T3 and T4 values in Lipizzans were in the normal range for warm-blooded horses and the age and sex-related fluctuations were in agreement with those for other horse breeds. Horse, lipizzan, age, sex, pregnancy, RIA, thyroxin; triiodothyronine.
Cumulative Annual
View Publication
The following links allow you to view full publications. These links are maintained by other sources not affiliated with Microsoft Academic Search.
Sort by: