title: Mutation of ameloblastin gene in calcifying epithelial odontogenic tumor.
abstract: BACKGROUND
  Ameloblastin (AMBN) gene expresses an important protein that acts as a cell adhesion molecule. This protein plays an important role in maintaining the ameloblast secretory stage of differentiation by binding to them and inhibiting their proliferation. Due to the relationship of this protein in the differentiation and proliferation of odontogenic cells, here, we investigated this gene in different types of odontogenic tumors.
  
  
  METHODS
  Sequencing of the all encoding region of AMBN gene was carried out in four frozen cases of odontogenic tumors: one case of calcifying epithelial odontogenic tumor (CEOT), two calcifying odontogenic cysts (COC) and one ameloblastic fibroma (AF).
  
  
  RESULTS
  DNA sequencing was modified in an important domain of the AMBN only in the CEOT.
  
  
  CONCLUSIONS
  The present study suggests that AMBN gene alterations may be relevant to the pathogenesis of CEOT.
authors: Department of Oral Surgery and Pathology, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
authors: Paôlla Freitas
authors: PF
authors: Perdigão
authors: Vinicius Magalhães
authors: VM
authors: Carvalho
authors: Luiz
authors: L
authors: DE Marco
authors: Ricardo Santiago
authors: RS
authors: Gomez
mesh_terms: D000565:Ameloblasts / Q000473:pathology*; D002114:Calcinosis / Q000473:pathology*; D004252:DNA Mutational Analysis; D003746:Dental Enamel Proteins / Q000235:genetics*; D004847:Epithelial Cells / Q000473:pathology*; D005350:Fibroma / Q000473:pathology*; D006801:Humans; D009154:Mutation / Q000235:genetics*; D009808:Odontogenic Tumors / Q000235:genetics* / Q000473:pathology
chemical_list: C490889:AMBN protein, human; D003746:Dental Enamel Proteins