Identification of novel mutations of the DAX-1 gene in patients with X-linked adrenal hypoplasia congenita

被引:18
作者
Choi, JH
Shin, YL
Kim, GH
Kim, Y
Park, S
Park, JY
Oh, C
Yoo, HW
机构
[1] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Pediat, Seoul 138736, South Korea
[2] Univ Ulsan, Coll Med, Asan Med Ctr, Med Genet Clin & Lab, Seoul 138736, South Korea
[3] Univ Ulsan, Coll Med, Asan Med Ctr, Genome Res Ctr Birth Defects & Genet Disorders, Seoul 138736, South Korea
[4] Univ Ulsan, Coll Med, Asan Med Ctr, Asan Inst Life Sci, Seoul 138736, South Korea
关键词
adrenal hypoplasia congenita; adrenal insufficiency; contiguous gene syndrome; DAX-1; hypogonadotropic hypogonadism;
D O I
10.1159/000085557
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Objective: X-linked adrenal hypoplasia congenita (AHC) is a condition clinically featuring adrenal insufficiency and hypogonadotropic hypogonadism caused by mutations of DAX-1. This study was undertaken to characterize the molecular defects of DAX-1 in 3 unrelated Korean patients with AHC. Patients and Methods: Patient 1 is a 6-year-old boy who presented with a salt-losing adrenal crisis in the neonatal period. Patient 2 is a 3-year-old boy who manifested aspiration pneumonia and adrenal insufficiency at the age of 1 month. Patient 3 is a 7-year-old boy who developed an adrenal crisis at the age of 3 days. In each of these patients, DAX-1 was analyzed by direct DNA sequencing after polymerase chain reaction amplification of the entire coding region. Results: Direct sequencing of DAX-1 revealed two novel mutations, 1156_1157delCT in patient 1 and another novel nonsense mutation W105X in patient 2. Patient 3 had complete deletion of DAX-1. In patient 3, serum transaminases and creatine kinase levels were elevated while the glycerol kinase activity of leukocytes was decreased. Markedly elevated glycerol excretion was detected by urine organic acid analysis. Patient 3 was diagnosed as Xp21 contiguous gene syndrome associated with deletions of the entire IL1RAPL, GK genes and the C-terminal region of DMD gene. Conclusions: Two novel mutations of DAX-1 were detected in 2 unrelated patients with AHC, and complete deletion of DAX-1 in a patient with Xp21 contiguous gene syndrome who also presented with glycerol kinase deficiency, Duchenne muscular dystrophy, and AHC. Copyright (C) 2005 S. Karger AG, Basel.
引用
收藏
页码:200 / 205
页数:6
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