Homozygous Q258X Mutation in the Steroidogenic Acute Regulatory Gene in a Japanese Patient with Congenital Lipoid Adrenal Hyperplasia

Endocrine Journal

MAYUMI SHIMIZU¹  TAKASHI SHINAGAWA¹  AYAKO TANAE²  ATSUKO NAGASHIMA-MIYOKAWA¹  TOSHIAKI TANAKA¹  ITSURO HIBI²  TORU YASUNAGA¹  NORIYUKI KATSUMATA¹ 

[1] Department of Endocrinology and Metabolism, National Children's Medical Research Center;Division of Endocrinology and Metabolism, National Children's Hospital

关键词: Congenital lipoid adrenal hyperplasia;    Steroidogenic acute regulatory protein;    Nonsense mutation;    Homozygous;    Heterozygous;    Restriction endonuclease digestion;   

DOI  :  10.1507/endocrj.44.441

学科分类：内分泌与代谢学

来源: Japan Endocrine Society

【 摘 要 】

References(17)Cited-By(4)Congenital lipoid adrenal hyperplasia (CLAN) is an autosomal recessive disorder characterized by impaired synthesis of all adrenal and gonadal steroid hormones. It has recently been reported that mutations in the steroidogenic acute regulatory protein (StAR) gene cause CLAH. We analyzed the nucleotide sequences of exon 7 of the StAR gene in a Japanese CLAH patient with a karyotype of 47, XYY, and her parents. The patient was homozygous for a nonsense mutation Q258X, which changed codon 258 (CAG) encoding Gln to the stop codon TAG, and the her parents were heterozygous for the Q258X mutation. Since the Q258X mutation destroys a MvaI site normally present in the StAR gene sequence, we confirmed the Q258X mutation by means of the restriction endonuclease MvaI digestion of the PCR products. Endocrinological examinations of the parents revealed normal responses of adrenal steroid hormones to exogenous adrenocorticotropin administration, confirming the failure to detect the heterozygous carriers of CLAH by hormonal evaluation.

【 授权许可】

Unknown