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A new locus for hereditary haemorrhagic telangiectasia (HHT3) maps to chromosome 5

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Cole, S G, Begbie, M E, Wallace, G M F, Shovlin, C L·2005·Journal of Medical Genetics

Abstract

Patients with hereditary haemorrhagic telangiectasia (HHT, or Osler-Weber-Rendu syndrome) have variable presentation patterns and a high risk of preventable complications. Diagnostic tests for mutations in endoglin (HHT type 1) and ALK-1 (HHT type 2) are available. Some HHT patients are now known to have HHT-juvenile polyposis overlap syndrome due to Smad4 mutations. Families were ascertained following the presentation of probands for embolization of pulmonary arteriovenous malformations. Genome-wide linkage studies using over 700 polymorphic markers, and sequencing of candidate genes, were performed. In a previously described HHT family unlinked to endoglin or ALK-1, linkage to Smad4 was excluded, and no mutations were identified in the endoglin, ALK-1, or Smad4 genes. Two point LOD scores and recombination mapping identified a 5.4 cM HHT3 disease gene interval on chromosome 5 in which a single haplotype was inherited by all affected members of the pedigree. The remainder of the genome was excluded to a 2–5 cM resolution. We are currently studying a further family potentially linked to HHT3. We conclude that classical HHT with pulmonary involvement can result from mutations in an unidentified gene on chromosome 5. Identification of HHT3 should further illuminate HHT pathogenic mechanisms in which aberrant transforming growth factor (TGF)-β signalling is implicated.

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Metadata

Authors
Cole, S. G., Begbie, M. E., Wallace, G. M. F., & Shovlin, C. L.
Venue
Journal of Medical Genetics
Publisher
BMJ
Published
2005-07
Volume
42
Issue
7
Pages
577-582
ISSN
  • 0022-2593 (ISSN-L)
  • 1468-6244
OpenAlex
W2100523257
Cited by
320
References
18
FWCI
10.57
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: A new locus for hereditary haemorrhagic telangiectasia (HHT3) maps to chromosome 5. https://app.cochat.ai/papers/10.1136/jmg.2004.028712
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Cole, S. G., Begbie, M. E., Wallace, G. M. F., & Shovlin, C. L. (2005). A new locus for hereditary haemorrhagic telangiectasia (HHT3) maps to chromosome 5. Journal of Medical Genetics. https://doi.org/10.1136/jmg.2004.028712

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