Genetic heterogeneity of gingival fibromatosis on chromosome 2p.

Journal Article

Gingival fibromatosis (GF) occurs in several genetic forms as a simple Mendelian trait, in malformation syndromes, and in some chromosomal disorders. Specific genes responsible for GF have not been identified. An autosomal dominant form of hereditary gingival fibromatosis (HGF, MIM 135300) was recently mapped to chromosome 2p21 in a large Brazilian family and there was an earlier report of GF in a boy with a cytogenetic duplication involving 2p13-->p21. We thus hypothesised that a common gene locus may be responsible for GF in both the Brazilian family and the boy with the chromosome 2p duplication. We performed additional genetic linkage studies on the Brazilian family and molecular cytogenetic studies on the patient with the cytogenetic duplication to correlate more precisely the genetic interval of the HGF phenotype with the duplicated 2p interval. Additional linkage analysis of new family members resulted in refinement of the candidate region for HGF to an 8 Mb region. Molecular cytogenetic analysis of the 2p13-->p21 duplication associated with GF showed that the duplicated region was proximal to the candidate interval for HGF. Thus, our results support the presence of two different gene loci on chromosome 2p that are involved in GF.

Full Text

Duke Authors

Cited Authors

  • Shashi, V; Pallos, D; Pettenati, MJ; Cortelli, JR; Fryns, JP; von Kap-Herr, C; Hart, TC

Published Date

  • September 1999

Published In

Volume / Issue

  • 36 / 9

Start / End Page

  • 683 - 686

PubMed ID

  • 10507724

International Standard Serial Number (ISSN)

  • 0022-2593

Language

  • eng

Conference Location

  • England