Abstract
Signal transduction of a human follicular thyroid cancer cell line (FTC133) was investigated. The protein kinase C (PKC)-agonist TPA enhanced invasion by 15%, whereas its antagonists staurosporine, chelerythrine and calphostin C were inhibiting by up to 62%. TSH and EGF stimulated invasion of FTC133. Antagonism of PKC reversed TSH-mediated stimulation, whereas it had no effect on EGF-stimulation. Our data provide evidence for an essential role of PKC in signal transduction of invasive thyroid cancer.
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