A novel de novo frame-shift mutations of the EDA gene in a Chinese Han family with hypohidrotic ectodermal dysplasia

作者：Huang Changzheng; Yang Qinbo; Ke Tie; Wang Haisheng; Wang Xu; Shen Jiqun; Tu Xin; Tian Jin; Liu Jing Yu; Wang Qing K^*; Liu Mugen

来源：Journal of Human Genetics, 2006, 51(12): 1133-1137.

DOI：10.1007/s10038-006-0071-8

• EDA
• frameshift mutation
• RFLP
• X-linked hypohidrotic ectodermal dysplasia

Hypohidrotic ectodermal dysplasia (HED) is characterized by severe hypohidrosis, hypotrichosis, and hypodontia. It can be inherited in autosomal dominant, autosomal recessive, or X-linked patterns. Mutations in the EDA gene, which encodes ectodysplasin-A, are responsible for X-linked HED (XLHED). In the present study, we identified a Chinese Han family with XLHED. Direct DNA sequence analysis of the entire coding region and exon-intron boundaries of EDA identified a novel de novo mutation, c.573_574insT, in two affected males and one carrier female. Restriction fragment length polymorphism (RFLP) analysis showed that the mutation was not present in 200 controls. The I-bp insertion mutation resulted in a frameshift, which causes premature termination of EDA polypeptide and truncation of the EDA protein. These results suggest that the c.573_574insT mutation of the EDA gene is a cause for XLHED in the family. To the best of our knowledge, this is the first de novo insertion mutation of EDA described for XLHED.

• 出版日期2006
• 单位司法部司法鉴定科学技术研究所; 华中科技大学