Regulation of the Expression of Epidermal Growth Factor Receptor mRNA with Thyroid Hormone L-3,5,3'-Triiodothyronine in Rat Hepatoma Cells

The expression of epidermal growth factor (EGF) receptor mRNA was examined using thyroid hormone L-3,5,3'-triiodothyronine (T3) by Northern blot analysis in rat hepatoma cells. The expression of full-length, but not truncated receptor mRNA was enhanced and destabilized with T3. These results suggest that T3 induces not only the expression of full-length EGF receptor mRNA but also accelerates their rate of turnover. The 3' terminal region of full-length EGF receptor mRNA may have a role in the destabilization of EGF receptor mRNA by T3, because truncated EGF receptor mRNA lacks only the 3' terminal region of full-length EGF receptor mRNA.