PMID- 2112152 OWN - NLM STAT- MEDLINE DCOM- 19900711 LR - 20181130 IS - 0021-972X (Print) IS - 0021-972X (Linking) VI - 70 IP - 6 DP - 1990 Jun TI - Inhibition of 125I organification and thyroid hormone release by interleukin-1, tumor necrosis factor-alpha, and interferon-gamma in human thyrocytes in suspension culture. PG - 1735-43 AB - To elucidate the mechanism of decreased 131I uptake by the thyroid gland in patients with subacute thyroiditis and painless thyroiditis, human thyroid follicles were cultured with interleukin-1 (IL-1), tumor necrosis factor-alpha (TNF alpha), and/or interferon-gamma (IFN gamma), and the effects of these cytokines on thyroid function were studied in vitro. When human thyrocytes were cultured in RPMI-1640 medium containing 0.5% fetal calf serum and TSH for 5-8 days, the cells incorporated 125I, synthesized de novo [125I]iodotyrosines and [125I]iodothyronines, and secreted [125I]T4 and [125I]T3 into the medium. IL-1 alpha and IL-1 beta inhibited 125I incorporation and [125I]iodothyronine release in a concentration-dependent manner. The minimal inhibitory effect was detected at 10 pg/ml. Electron microscopic examination revealed a marked decrease in lysosome formation in IL-1-treated thyrocytes. TNF alpha and IFN gamma also inhibited thyroid function in a concentration-dependent manner. Furthermore, when thyrocytes were cultured with IL-1, TNF alpha and IFN gamma, these cytokines more than additively inhibited thyroid function. Although the main mechanism of 131I uptake suppression in the thyroid gland in subacute thyroiditis is due to cellular damage and suppression of TSH release, our present findings suggest that IL-1, TNF alpha, and IFN gamma produced in the inflammatory process within the thyroid gland further inhibit iodine incorporation and at least partly account for the decreased 131I uptake by the thyroid gland in destruction-induced hyperthyroidism. FAU - Sato, K AU - Sato K AD - Department of Medicine, Institute of Clinical Endocrinology, Tokyo Women's Medical College, Japan. FAU - Satoh, T AU - Satoh T FAU - Shizume, K AU - Shizume K FAU - Ozawa, M AU - Ozawa M FAU - Han, D C AU - Han DC FAU - Imamura, H AU - Imamura H FAU - Tsushima, T AU - Tsushima T FAU - Demura, H AU - Demura H FAU - Kanaji, Y AU - Kanaji Y FAU - Ito, Y AU - Ito Y AU - et al. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Clin Endocrinol Metab JT - The Journal of clinical endocrinology and metabolism JID - 0375362 RN - 0 (Interleukin-1) RN - 0 (Iodine Radioisotopes) RN - 0 (Tumor Necrosis Factor-alpha) RN - 06LU7C9H1V (Triiodothyronine) RN - 82115-62-6 (Interferon-gamma) RN - 9002-71-5 (Thyrotropin) RN - Q51BO43MG4 (Thyroxine) SB - IM MH - Cells, Cultured MH - Dose-Response Relationship, Drug MH - Humans MH - In Vitro Techniques MH - Interferon-gamma/*pharmacology MH - Interleukin-1/*pharmacology MH - Iodine Radioisotopes/*metabolism MH - Microscopy, Electron MH - Thyroid Gland/cytology/*drug effects/metabolism MH - Thyroiditis/metabolism MH - Thyrotropin/physiology MH - Thyroxine/*metabolism MH - Triiodothyronine/*metabolism MH - Tumor Necrosis Factor-alpha/*pharmacology EDAT- 1990/06/01 00:00 MHDA- 1990/06/01 00:01 CRDT- 1990/06/01 00:00 PHST- 1990/06/01 00:00 [pubmed] PHST- 1990/06/01 00:01 [medline] PHST- 1990/06/01 00:00 [entrez] AID - 10.1210/jcem-70-6-1735 [doi] PST - ppublish SO - J Clin Endocrinol Metab. 1990 Jun;70(6):1735-43. doi: 10.1210/jcem-70-6-1735.