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J. Biol. Chem., Vol. 256, Issue 2, 563-566, 01, 1981

Thyroid hormone stimulation of plasma protein synthesis in cultured hepatocytes

KM Hertzberg, J Pindyck, MW Mosesson and G Grieninger

The direct effect of thyroid hormones on hepatocellular plasma protein synthesis has been studied in primary monolayer cultures derived from chick embryo liver. The chemically defined medium used for plating and maintaining the cultures contained no other hormones, protein, or serum supplement. Addition of physiological concentrations (10 nM) of triiodothyronine or thyroxine produced 3-fold or greater increases in the rates of synthesis of fibrinogen and three other major secreted proteins. By comparison albumin, transferrin, and total protein synthesis were not substantially increased. The enhanced synthesis of selected plasma proteins could be detected 6 h after initial addition of triiodothyronine. Exposure of the cells to the hormone for only 30 min was nearly as effective as continuous exposure in eliciting the ultimate response. Triiodothyronine exerted its half-maximal effect at a concentration of 1 nM. Diminished potency was associated with less iodination of the hormone; a marked reduction was noted with di- iodinated thyronine and no stimulatory activity at all with either mono- or non-iodinated thyronine.
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				C.-h. Shih, S.-L. Chen, C.-C. Yen, Y.-H. Huang, C.-d. Chen, Y.-S. Lee, and K.-h. Lin Thyroid Hormone Receptor-Dependent Transcriptional Regulation of Fibrinogen and Coagulation Proteins Endocrinology, June 1, 2004; 145(6): 2804 - 2814. [Abstract] [Full Text] [PDF]