title: Autosomal-dominant ankyloglossia and tooth number anomalies.
abstract: Ankyloglossia is a congenital oral anomaly characterized by the presence of a hypertrophic lingual frenulum. It frequently accompanies X-linked cleft palate and is sometimes seen alone due to mutations in the gene encoding the transcription factor TBX22, while knockout of Lgr5 in the mouse results in ankyloglossia. The aim of the present study was to characterize the phenotype and to verify sequence variations in the LGR5 gene in a Brazilian family with ankyloglossia associated with tooth number anomalies. Twelve individuals of three generations were submitted to physical, oral, and radiographic examinations and molecular analysis. Eight had ankyloglossia with various degrees of severity. Six also had hypodontia in the lower incisor region; one had a supernumerary tooth in this region, and another had a supernumerary tooth in the lower premolar region. The characterization of this family determined an autosomal-dominant inheritance and excluded the LGR5 gene mutations as being involved in the pathogenesis of this condition.
authors.affiliation: Oral Care Center for Inherited Diseases, University Hospital of Brasilia, Department of Dentistry, University of Brasilia, Brazil. acevpoppe@gmail.com
authors.forename: A C
authors.initials: AC
authors.lastname: Acevedo
authors.forename: J A C
authors.initials: JA
authors.lastname: da Fonseca
authors.forename: J
authors.initials: J
authors.lastname: Grinham
authors.forename: K
authors.initials: K
authors.lastname: Doudney
authors.forename: R R
authors.initials: RR
authors.lastname: Gomes
authors.forename: L M
authors.initials: LM
authors.lastname: de Paula
authors.forename: P
authors.initials: P
authors.lastname: Stanier
mesh_terms: D000848:Anodontia / Q000150:complications* / Q000235:genetics; D001938:Brazil; D004252:DNA Mutational Analysis; D005260:Female; D005799:Genes, Dominant; D006801:Humans; D008035:Lingual Frenum / Q000002:abnormalities*; D008297:Male; D009154:Mutation; D010375:Pedigree; D043562:Receptors, G-Protein-Coupled / Q000172:deficiency / Q000235:genetics*; D014060:Tongue Diseases / Q000150:complications / Q000151:congenital / Q000235:genetics*; D014096:Tooth, Supernumerary / Q000150:complications* / Q000235:genetics; D055815:Young Adult
chemical_list: C116884:LGR5 protein, human; D043562:Receptors, G-Protein-Coupled