| Abstract: | Further experimentation with the steer thyroid cell line indicates that the formation of "follicles" is enhanced by exposure to 8.9 X 10(-7) M thyroxine (T4) or triiodothyronine (T3) for 96 hr. The production of mucosubstances by the cultured thyroid cells is also increased by treating with T4 or T3, effects demonstrable after staining with PAS-alcian blue at pH 2.5. It is suggested that these in vitro effects bear on morphological organization and synthetic activity of the thyroid gland as well as on autoregulation and intraglandular homeostasis that may occur in situ. |
