[Screening for EXT1 and EXT2 gene mutations in a ethnic Han Chinese family from Shanxi with hereditary multiple exostoses].

Objective: To screen for potential mutations in an ethnic Han Chinese family from Shanxi with hereditary multiple exostoses.

Methods: Polymerase chain reaction and DNA sequencing were used to screen potential mutations in EXT1 and EXT2 genes.

Results: For EXT1 gene, two synonymous mutations (P477P and E587E), three intronic mutations (c.1537 -48A>G, c.1721 +203A>G and c.1722 -103C>G) were detected. For EXT2 gene, five intronic mutations (c.-29 -148A>T, c.1080 -18T>A, c.1336 -93C>T, c.1526 -166C>T, and c.1526 -195C>T) were identified. Among these, EXT1 P477P, EXT1 E587E and EXT2 c.1080 -18T>A are polymorphisms listed by Multiple Osteochondroma Mutation Database, whilst the other 7 sites have not been reported.

Conclusion: No mutations have been found among all exons of the EXT1 and EXT2 genes in this family. Linkage analysis is necessary for identifying the cause of this disease.