[Changes in the chromatin structure of the thyroid cells related to the expression of the thyroglobulin gene].

A highly purified thyroglobulin mRNA was isolated from human nodal euthyroid goiter. A full-length cDNA was synthesized from 33S RNA by using reverse transcriptase in the presence of human placenta ribonuclease inhibitor. A DNA complementary to human Tg mRNA was used in liquid hybridization experiments to quantify Tg mRNA.

[Thyroglobulin gene expression in human thyroid cells in various types of thyroid pathology].

Highly purified thyroglobulin mRNA was isolated from human nodal euthyroid goiter. Full length cDNA was synthesized from 33S RNA by using reverse transcriptase in the presence of human placenta ribonuclease inhibitor. DNA complementary to human Tg mRNA was used in liquid hybridization experiments to determine the quantity of Tg mRNA.

[Mapping of the thyroglobulin gene in high molecular weight DNA from the human thyroid in normal conditions and in thyroid pathology].

A highly purified thyroglobulin (Tg) mRNA was isolated from human nodal euthyroid goiter. Ultracentrifugation in a 5-20% sucrose density gradient revealed that the protein has a sedimentation coefficient of 33S. cDNA was synthesized from the 33S RNA, using reverse transcriptase in the presence of a human placental ribonuclease inhibitor.

[Determination of the ratio of membrane-bound and free polyribosomes and of the content of thyroglobulin in these fractions in normal thyroid gland cells and in several types of thyroid diseases].

The ratio of membrane-bound and free polyribosomes in thyroid gland cells was decreased two-fold in nodular euthyroid goiter and five-fold--in Hashimoto thyroiditis; a slight increase in thyroglobulin synthesis in free polyribosomes was noted in goiter. Impairments in transfer of the translation products across membranes of rough endoplasmic reticulum may be one of the causes of deteriorations in thyroglobulin synthesis in goiters.