Thyroxin and thiouracyl influence upon some biochemical parameters in chicken thymuses.

Administration of L-thyroxin in a dose of 30 micrograms/chicken, i.m. and 2-thiouracyl in a dose of 0.3 mg/chicken, i.m. for an interval of 3 days, determined, at the thymus level, increases of total protein content in the Tu group, in parallel with decreases of the nitrogen of free amino acids level in the Tx group, increases of DNA content in the Tx group and an increase of the thymus weight in both groups. Modifications are due to the action of thyroxin, on the one hand, and on the other to the doses of antithyroid drug which determines a raise of T4 content in the plasma and the manifestation of activities specific to this hormone.