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Identification of a novel EXT1 mutation in patients with hereditary multiple exostosis by exome sequencing.

Authors: Liu, Hongjie  Wu, Song  Duan, Li  Zhu, Weiming  Zhang, Shiquan  Hu, Xiaoxiao  Jia, Wenlong  Yang, Guosheng  Liu, Chunxiao  Li, Weiping  Yang, Lei  Guo, Lijun  Lin, Youcheng  Wang, Yongqiang  He, Meijian  Yang, Zhao  He, Yingying  Cai, Zhiming  Wang, Daping 
Citation: Liu H, etal., Oncol Rep. 2015 Feb;33(2):547-52. doi: 10.3892/or.2014.3610. Epub 2014 Nov 21.
Pubmed: (View Article at PubMed) PMID:25421355
DOI: Full-text: DOI:10.3892/or.2014.3610

Hereditary multiple exostosis (HME) is an autosomal inherited skeletal disease whose etiology is not fully understood. To further understand the genetic spectrum of the disease, we analyzed a five-generation Chinese family with HME that have observable inheritance. Exome sequencing was performed on three HME individuals and three unaffected individuals from the family. A downstream study confirmed a new C deletion at codon 442 on exon 5 of the exostosin-1 (EXT1) gene as the only pathogenic site which generated a stop codon and caused the truncation of the protein. We rediscovered the deletion in other affected individuals but not in the unaffected individuals from the family. Upon immunohistochemistry assay, we found that the EXT1 protein level of the patients with the novel mutation in our study was less than the level in the patients without the EXT1 mutation from another unrelated family. For a deeper understanding, we analyzed the mutation spectrum of the EXT1 gene. The present study should facilitate a further understanding of HME.

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CRRD Object Information
CRRD ID: 13208234
Created: 2017-08-08
Species: All species
Last Modified: 2017-08-08
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.