PMID- 3660401 OWN - NLM STAT- MEDLINE DCOM- 19871103 LR - 20190727 IS - 0040-8727 (Print) IS - 0040-8727 (Linking) VI - 152 IP - 3 DP - 1987 Jul TI - Characteristics of anti-TSH receptor antibodies in two patients who developed spontaneous hypothyroidism after antithyroid drug therapy for hyperthyroid Graves' disease. PG - 269-75 AB - Spontaneous hypothyroidism was developed in two patients with Graves' hyperthyroidism 1.8 or 1 years after antithyroid drug therapy. In these patients anti-thyrotropin (TSH) receptor antibodies were detected. Thyrotropin receptor antibody (TRAb) index measured with TSH radioreceptor assay was 61.0% in case 1 and 68.0% in case 2 (normal value: -10 to 10%), and human thyroid adenylate cyclase stimulating activities (HTACS) were 154% in case 1 and 190% in case 2 (normal value: 70 to 130%). IgG from case 1 suppressed the stimulating activity of bovine TSH (bTSH) on thyroid adenylate cyclase in low concentrations in vitro. These results indicate that a blocking type of anti-TSH receptor antibodies as well as concomitant chronic thyroiditis might be a causative factor in patients who developed spontaneous hypothyroidism shortly after the cessation of antithyroid drugs. FAU - Kaise, K AU - Kaise K AD - Second Department of Internal Medicine, Tohoku University School of Medicine, Sendai. FAU - Kaise, N AU - Kaise N FAU - Yoshida, K AU - Yoshida K FAU - Itagaki, Y AU - Itagaki Y FAU - Yamamoto, M AU - Yamamoto M FAU - Sakurada, T AU - Sakurada T FAU - Saito, S AU - Saito S FAU - Yoshinaga, K AU - Yoshinaga K LA - eng PT - Case Reports PT - Journal Article PL - Japan TA - Tohoku J Exp Med JT - The Tohoku journal of experimental medicine JID - 0417355 RN - 0 (Autoantibodies) RN - 0 (Immunoglobulin G) RN - 0 (Receptors, Thyrotropin) RN - 9002-71-5 (Thyrotropin) RN - EC 4.6.1.1 (Adenylyl Cyclases) SB - IM MH - Adenylyl Cyclases/metabolism MH - Autoantibodies/*immunology MH - Enzyme Activation/drug effects MH - Female MH - Graves Disease/*drug therapy/immunology MH - Humans MH - Hypothyroidism/*immunology MH - Immunoglobulin G/physiology MH - Male MH - Middle Aged MH - Receptors, Thyrotropin/*immunology MH - Thyroid Gland/enzymology MH - Thyrotropin/pharmacology EDAT- 1987/07/01 00:00 MHDA- 1987/07/01 00:01 CRDT- 1987/07/01 00:00 PHST- 1987/07/01 00:00 [pubmed] PHST- 1987/07/01 00:01 [medline] PHST- 1987/07/01 00:00 [entrez] AID - 10.1620/tjem.152.269 [doi] PST - ppublish SO - Tohoku J Exp Med. 1987 Jul;152(3):269-75. doi: 10.1620/tjem.152.269.