Sporadic Congenital Hyperthyroidism due to a Germline Mutation in the Thyrotropin Receptor Gene (Leu 512 Gln) in a Japanese Patient

Endocrine Journal

Akira MIYAUCHI¹  Akira HISHINUMA²  Mitsuru ITO¹  Eijun NISHIHARA¹  Hidemi OHYE¹  Sumihisa KUBOTA¹  Nobuyuki AMINO¹  Kanji KUMA¹  Shuji FUKATA¹  Takumi KUDO¹ 

[1] Kuma Hospital;Department of Clinical Laboratory Medicine, Dokkyo University School of Medicine

关键词: Thyrotropin receptor;    Germline mutation;    Nonautoimmune hyperthyroidism;    Congenital onset;    Advanced bone age;   

DOI  :  10.1507/endocrj.K06-090

学科分类：内分泌与代谢学

来源: Japan Endocrine Society

【 摘 要 】

References(27)Cited-By(14)Constitutively activating thyrotropin receptor (TSHR) germline mutations have been identified as a molecular cause of congenital hyperthyroidism. We here describe a Japanese woman who had presented with severe hyperthyroidism and advanced bone age as a neonate. She underwent neurosurgical intervention for craniosynostosis, and presented with perodactylia and mild mental retardation with hydrocephalus. Hyperthyroidism has been refractory to antithyroid drug therapy in the absence of antithyrotropin receptor antibodies during follow-up of 20 years, resulting in an enlarged goiter. Analysis of the patient's genomic DNA showed a heterozygous thymine-to-adenine point mutation in exon 10 of TSHR at position 1535 which was not present in the parents' DNA. This mutation, changing leucine to glutamine in codon 512 in the third transmembrane region, was previously identified as a somatic mutation in toxic thyroid nodules and was shown to increase basal cAMP production in vitro. To our knowledge, this is the first report of a germline mutation of TSHR causing sporadic congenital nonautoimmune hyperthyroidism in a Japanese patient.

【 授权许可】

Unknown