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, tumour necrosis factor-β and interferon-
, separately and added together with interleukin-1 β, on the function of cultured human thyroid cells
Interleukin (IL)-1, tumour necrosis factor (TNF)-
and interferon (IFN)-
have been demonstrated in thyroid tissue. We have previously shown that high concentrations of IL-1 inhibit and low concentrations stimulate human thyroid cell function in vitro. In the present study, TNF-
, TNF-β and IFN-
all inhibited thyroglobulin (Tg) and cAMP production from cultured human thyroid cells. When TNF-
was added simultaneously with IL-1 β, the highest concentration of TNF-
(106 U/l) enhanced the inhibition of Tg and cAMP induced by IL-1β (1–105 U/1). TNF-β had no influence on IL-1β-induced inhibition. IFN-
(104 U/1) added together with IL-1β in lower concentrations (1—102 U/l) stimulated cAMP production, while at high concentrations of IL-1β (105 U/1), IFN-
enhanced the inhibitory influence of IL-1 β on Tg production.
The hormones of the immune system, IL-1, TNF and IFN-
, may thus contribute to the decreased thyroid function characteristic of some thyroid inflammatory diseases.
Journal of Endocrinology (1994) 143, 359–365
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