- A Case of Methimazole-induced Agranulocytosis and Kikuchi's Disease in a Patient with Graves' Disease.
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Seung Eun Lee, Jihyun Ahn, Jaetaek Kim, Yeon Sahng Oh, Yun Jae Chung
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J Korean Endocr Soc. 2008;23(6):420-424. Published online December 1, 2008
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DOI: https://doi.org/10.3803/jkes.2008.23.6.420
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- Methimazole-induced agranulocytosis is a rare, but critical side effect that should be recognized as soon as possible since it may induce a life-threatening condition when it was overlooked. Histiocytic necrotizing lymphadenitis is also called Kikuchi's lymphadenitis, and this is a rare form of lymphadenitis with a self-limited clinical course and this illness is accompanied by cervical lymph node enlargement, fever and malaise. We recently experienced a patient with methimazole-induced agranulocytosis and Graves' disease, and this was accompanied by Kikuchi's disease; the patient presented with sore throat and multiple enlarged cervical lymph nodes. To the best of our knowledge, there is no previous report on methimazole-induced agranulocytosis combined with Kikuchi's disease. Therefore, we report here on this very rare case along with a brief review of the relevant literature.
- Changes in Properties of Thyrotropin Receptor Antibodies Following Radioiodine Treatment in Patients with Graves' Disease.
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Won Bae Kim, Hyun Kyung Chung, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Do Joon Park, Yeon Sahng Oh
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J Korean Endocr Soc. 1997;12(2):194-206. Published online January 1, 2001
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- BACKGROUND
It has been suggested that thyroid stimulation blocking antibody (TSBAb) is involved in the development of early hypothyroidism after radioiodine treatment in patient with Graves disease. However, previous studies have reported the effect of radioiodine treatment on overall changes of TSH receptor antibodies without detailed observation of changes in properties of TSH receptor antibodies. The aim of this study is to evaluate the effect of radioiodine treatment on thyroid stimulation antibody (TSAb) or on thyroid stimulation blocking antibody (TSBAb) activities and to see whether the appearance of TSBAb after radioiodine treatment is involved in the development of early hypothyroidism in patients with Graves disease. METHODS: The activities of TSAb, TSBAb were measured serially with human TSH receptor transfected Chinese hamster ovary (CHO) cells in 36 patients with Graves disease who received 131I treatment. In addition to the wild type TSH receptor-expressing cells, we used a chimeric receptor that 90-165 amino acid residues were substituted by those of rat LH/CG receptor (Mc2) for measurement of TSBAb without interference by the presence of TSAb and for evaluation of TSAb epitope spreading. We evaluated the association of early hypothyroidism after 131I treatment with changes of various immunologic parameters. RESULTS: In 14 (39%) of 36 patients, TSBAb activities were present in their sera before or after 131I treatment. Four of them had TSBAb activities before 131 treatment, and 12 newly acquired TSBAb activities after 131I treatment. The existence of TSBAb was not associated with the development of early hypothyroidism after 131I treatment but with low TSAb activities before 131 treatment, high thyroidal uptake of 131I given and with old age. The phenomena of epitope spreading measured by TSAb with Mc2 mutant clone before and after 131I treatment was not infrequent, but it had no clinical relevance. CONCLUSION: These results suggest that the existence of TSBAb may be not a major factor in the development of early hypothyroidism after radioiodine treatment in Graves disease. Other factors such as TSAb activities before radioiodine treatment, the efficiency of thyroidal uptake of 131I or old age are associated with the development of early hypothyroidism.
- Thyroid Stimulating Antibody Assay with Chinese Hamster Ovary Cells Expressing Human Thyroid Stimulating Hormone (TSH) Receptor; Optimization of Assay Condition.
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Bo Youn Cho, Hong Kyu Lee, Young Kee Shong, Chang Soon Koh, Ka Hee Yi, Yeon Sahng Oh, Won Bae Kim
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J Korean Endocr Soc. 1995;10(4):333-346. Published online November 7, 2019
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- We investigated the optimal condition of thyroid stimulating antibody(TSAb) assay using Chinese hamster ovary cells transfected with cDNA of human TSH receptor(TSHr-CHO) stably expressing functional TSH receptors. The extracellular cAMP responses of TSHr-CHO cells to the stimulation of bTSH or Graves' IgG were observed in three different incubation media. Stimulation indices of extracellular cAMP were higher when sucrose containing NaCl-free isotonic Hank's balanced salt solution(HBSS)(media A)was used as incubation media than those of NaCl-free hypotonic HBSS(media B) or those of NaCl containing isotonic HBSS(media C). The incubation of TSHr-CHO cells in media B caused marked increase in the basal cAMP level without concomittant fold-increase in the stimulated cAMP level at various doses of bTSH and Graves' IgG. Decreasing the stimulation indices of extracellular cAMP, use of media B failed to detect TSAb activities in two TSAb-positive Graves' IgG tested. In case of media C, extracellular cAMP responses are poor at 0.001 and 0.1U/L of bTSH and at all doses of Graves' IgG tested(0.5, 1, 5g/L). The incubation of TSHr-CHO cells in media B caused significant increase in the number of trypan blue-stained, nonviable cells(5.7+-1.5, 7.6+-1.9 and 8.5+-1.6% at 1, 2 and 3h of incubation, respectively; p<0.01) comparing to those incubated in media A or media C(about 2-3% in both media). Those decrease in the viability of TSHr-CHO cells when incubated in hypotonic incubation media may explain the decrease in the stimulation index of extracellular cAMP with the use of media B in contrast to the case of FRTL-5 cells. TSAb assay of 87 consecutive fresh Graves' patients with TSHr-CHO cells using media A detected TSAb activities in 90%(78 patients) of them, and moreover TSAb activities showed significant positive correlation with the pre-treatment serum T_3 and free T_4 levels of those patients. We conclude that TSAb assay with TSHr-CHO cells is a sensitive and physiologically relevant assay system to measure TSAb activities merely through measurements of extracellular cAMP provided that the cells are incubated in NaCl-free isotonic incubation media.
- Invasive Fibrous (Riedel's) Thyroiditis.
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Yeon Sahng Oh
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J Korean Endocr Soc. 1994;9(4):273-276. Published online November 6, 2019
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- No abstract available.
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