Fig. 2.
Iodide suppression of NIS promoter activity in FRTL-5 thyroid cells. Iodide suppressed the NIS promoter activity induced by thyrotropin (TSH). Results are expressed as mean ± SD from three different experiments performed in triplicate. Significant decreases are noted: * p < 0.05; ** p < 0.01; *** p < 0.001.