Abstract
We describe a system of human thyroid follicles cultured in collagen suspended in serum-free medium. The method allows measurement of thyroid hormone secretion, iodide uptake and organification, cyclic adenosine monophosphate (cAMP) formation, gene expression, as well as cell growth. The system is superior to follicles freely suspended in cultured medium and also, as demonstrated by parallel experiments, to monolayer culture systems. A detailed description of the optimal conditions of the method is provided that, over a period of 8 years, has proven to be a powerful tool for measuring thyroid cell function, gene expression and cell proliferation.
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