Mutation and expression analysis of the endoglin gene in hereditary hemorrhagic telangiectasia reveals null alleles.

Published

Journal Article

Hereditary Hemorrhagic Telangiectasia (HHT) is an autosomal dominant disorder characterized by multisystemic vascular dysplasia and recurrent hemorrhage from the sites of vascular lesions. Two genes have been identified for HHT. Endoglin, a TGF-beta binding protein which maps to chromosome 9q3, is the gene for HHT1. The type and location of most of the previously described mutations in the endoglin (ENG) gene suggested a dominant-negative model of receptor-complex dysfunction for the molecular basis of this disorder. In this article we describe 11 novel ENG mutations in HHT kindreds, which include missense and splice-site mutations. Two identical missense mutations in unrelated families disrupt the start codon of the gene. In addition, some frameshift and nonsense mutations lead to very low or undetectable levels of transcript from the mutant allele. These combined data suggest that the nature of most ENG mutations is to create a null (nonfunctional) allele, and that there is no requirement for the synthesis of a truncated endoglin protein in the pathogenesis of HHT.

Full Text

Duke Authors

Cited Authors

  • Gallione, CJ; Klaus, DJ; Yeh, EY; Stenzel, TT; Xue, Y; Anthony, KB; McAllister, KA; Baldwin, MA; Berg, JN; Lux, A; Smith, JD; Vary, CP; Craigen, WJ; Westermann, CJ; Warner, ML; Miller, YE; Jackson, CE; Guttmacher, AE; Marchuk, DA

Published Date

  • January 1998

Published In

Volume / Issue

  • 11 / 4

Start / End Page

  • 286 - 294

PubMed ID

  • 9554745

Pubmed Central ID

  • 9554745

Electronic International Standard Serial Number (EISSN)

  • 1098-1004

International Standard Serial Number (ISSN)

  • 1059-7794

Digital Object Identifier (DOI)

  • 10.1002/(sici)1098-1004(1998)11:4<286::aid-humu6>3.0.co;2-b

Language

  • eng