Journal of Korean Endocrine Society 1994;10(3):220-228.
Published online November 6, 2019.
The Effect of Tumor Necrosis Factor - α on the Thyroglobulin Synthesis and TSH Action in Cultured Porcine Thyroid Cells.
Jae Wha Jo, Eun Jig Lee, Moon Suk Nam, Su Youn Nam, Young Duk Song, Sung Kil Lim, Hyun Chul Lee, Kap Bum Huh, Kyung Rae Kim
Abstract
Abnormal thyroid function is seen in a wide variety of patients with acute and chronic nonthyroidal-illness, consisting of reduction in both thyroid function and peripheral T_4 to T_3 conversion including decreased serum thyroxin(T_4), decreased triiodothyronine and normal or slightly increased serum TSH. Recently increasing awareness of the role of tumor necrosis factor-alpha(TNF-alpha) in systemic illness led us to consider a possible contribution of TNF-alpha to thyroid dysfunction in this setting. So we hypothesized that TNF-alpha might affect the function of the thyroid gland. We, therefore, explored the effects of TNF-alpha on the cultured porcine thyroid cells in TSH-stimulated and TSH-nonstimulated conditions. Primarily cultured porcine thyroid cells were incubated with various concentrations(-500pg/ml) of recombinant buman TNF-alpha and bTSH(1mu/ml), with measurement of secreted thyroglobulin(Tg) and cyclic AMP(c-AMP) as the end points of stimulation, and produced intracellular Tg by pulse-labelling. TNF-alpha significantly inhibited TSH-stimulated intracellular Tg synthesis and extracellar Tg secretion at 200 and 500pg/ml concentration. TNF-alpha didn't affect c-AMP production at any concentration tested. So we conclude that increased in serum TNF-alpha may be responsible for reduced thyroid function in patients with acute and chronic nonthyroidal-illness.
Key Words: Thyroglobulin synthesis, TNF - alpha


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