We have previously reported that the phorbol ester, 12-O-tetradecanoyl phorbol 13-acetate (TPA) induces, in the TT cell line of human medullary thyroid carcinoma, decreased cellular proliferation, increased calcitonin secretion, and enhanced calcitonin gene transcription (deBustros, A., Baylin, S. B., Berger, C. L., Roos, B.
C0238462
Medullary carcinoma of thyroid