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Publication Detail
Thyroid transcription factor 1 activates the promoter of the thyrotropin receptor gene.
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Civitareale D, Castelli MP, Falasca P, Saiardi A
  • Publication date:
  • Pagination:
    1589, 1595
  • Journal:
    Mol Endocrinol
  • Volume:
  • Issue:
  • Country:
  • Print ISSN:
  • Language:
  • Keywords:
    Animals, Base Sequence, Binding Sites, Cell Differentiation, Cell Line, Gene Expression Regulation, Molecular Sequence Data, Nuclear Proteins, Polymerase Chain Reaction, Promoter Regions, Genetic, Protein Binding, Rats, Receptors, Thyrotropin, Regulatory Sequences, Nucleic Acid, Transcription Factors, Transcriptional Activation
The TSH receptor (TSHr) is one of the most important thyroid differentiation markers. The binding of the TSH hormone to its receptor is an essential step in the modulation of thyroid function and differentiation. Here we report that the thyroid transcription factor 1 (TTF1), a transcription factor essential for thyroid-specific gene expression, binds to the TSHr minimal promoter. The promoter, when mutated at this binding site, shows a decreased activity in thyroid cells. In cotransfection experiments in nonthyroid cells, TTF1 is able to trans-activate the TSHr minimal promoter. This finding strengthens the importance of TTF1 in the maintenance of thyroid differentiation. The promoters of the main thyroid differentiation markers thyroglobulin, thyroperoxidase, and now TSHr, are regulated by TTF1.
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