title: The changes of cytokeratin 19 during oral carcinogenesis.
abstract: OBJECTIVE
  To investigate the changes of cytokeratin 19 during oral carcinogenesis.
  
  
  METHODS
  53 specimens including normal oral mucosa, oral epithelial hyperplasia, oral epithelial dysplasia and oral squamous cell carcinoma were investigated by immunohistochemistry, SDS-PAGE and Western blotting.
  
  
  RESULTS
  CK19 was detectable in suprabasal cell layers in epithelial dysplasia and in oral cancer, especially in poor-differentiated cancerous cells. With the lesions getting worse, the positive rate, the intensity and the constituent ratio of CK19 raised significantly.
  
  
  CONCLUSIONS
  The results suggest that the CK19 expression in suprabasal cell layers of oral mucosa can be used as a marker of diagnosis of oral precancerous lesions and CK19 expression is the initial events during oral carcinogenesis.
authors.affiliation: Department of Oral Medicine, Hospital Affiliated to Luzhou Medical College, Luzhou Sichuan 646000, China.
authors.forename: Minhai
authors.initials: M
authors.lastname: Nie
authors.forename: Li
authors.initials: L
authors.lastname: Zhong
authors.forename: Guangming
authors.initials: G
authors.lastname: Zeng
authors.forename: Bingqi
authors.initials: B
authors.lastname: Li
mesh_terms: D000328:Adult; D000368:Aged; D015153:Blotting, Western; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007633:Keratins / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D009061:Mouth Mucosa / Q000378:metabolism / Q000473:pathology*; D009062:Mouth Neoplasms / Q000378:metabolism / Q000473:pathology*; D011230:Precancerous Conditions / Q000378:metabolism / Q000473:pathology*
chemical_list: D007633:Keratins