title: Expression of Bcl-2 on oral cavity pathologies.
abstract: BACKGROUND
  Oral pathologies are divided by histochemical analysis. Molecular analysis is a future, and expensive, method, and in it, the role of gene BCL-2 may be of interest.
  
  
  METHODS
  Forty-five patients with tumors of the oral cavity were enrolled. Biopsies were taken from the incision line, tumor section, and healthy tissue. A three-stage molecular analysis was carried out. BCL-2 expression was investigated depending on the site of the tissue material sample and the final histopathological result: hyperplasia (group I), neoplasm in situ malignancy (group II), and carcinoma (group III). Data from four subgroups of group I were also analyzed.
  
  
  RESULTS
  No statistically significant difference was demonstrated in BCL-2 expression among the four hyperplasia subgroups. However, statistically significant differences in BCL-2 expression were found among the three basic study groups (p=0.00002) and among the biopsy collection sites (p=0.002). The difference was the most pronounced between carcinoma and incision line, but was also noticeable between neoplasm in situ malignancies and incision line.
  
  
  CONCLUSIONS
  Monitoring BCL-2 expression may facilitate prognosis of the progress and ultimate severity of oral cavity hyperplasias.
authors.affiliation: Department of Maxillofacial Surgery, Medical University of Silesia, Katowice, Poland. stomgab@wp.pl
authors.forename: Iwona
authors.initials: I
authors.lastname: Niedzielska
authors.forename: Daniel
authors.initials: D
authors.lastname: Sypnilewski
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Niedzielski
mesh_terms: D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D009062:Mouth Neoplasms / Q000235:genetics*; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000235:genetics* / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D051028:bcl-2-Associated X Protein / Q000235:genetics / Q000378:metabolism
chemical_list: D019253:Proto-Oncogene Proteins c-bcl-2; D012333:RNA, Messenger; D051028:bcl-2-Associated X Protein