title: [Human leukocyte antigen-DR expression and transcription in oral squamous cell carcinomas].
abstract: OBJECTIVE
  The purpose of this study was to investigate the transcription and expression levels of human leukocyte antigen-DR at different stages of oral squamous cell carcinomas.
  
  
  METHODS
  The specific monoclonal antibody and beta-locus specific oligonucleotide probes of human leukocyte antigen-DR were employed in this study. A total of 32 primary oral squamous cell carcinomas, 15 metastatic focuses and 26 histologically normal oral epithelia, were detected for the presence of the human leukocyte antigen-DR molecule by using immunohistochemistry and in situ hybridization.
  
  
  RESULTS
  The human leukocyte antigen-DR expression of the primary focuses was significantly higher than that of the normal epithelia (P < 0.05), but their expression did not show statistically difference between the metastatic focuses and the normal epithelia. The immunohistochemistric results were identical with those of in situ hybridization.
  
  
  CONCLUSIONS
  The abnormal higher expression of the HLA-DR is a common character of primary oral squamous cell carcinomas, but it may be not relevant to the metastasis of tumors.
authors.affiliation: Department of Oral and Maxillofacial Surgery, West China College of Stomatology, Sichuan University, Chengdu 610041, China.
authors.forename: Longjiang
authors.initials: L
authors.lastname: Li
authors.forename: Shaoping
authors.initials: S
authors.lastname: Zhang
authors.forename: Meng
authors.initials: M
authors.lastname: Tong
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000235:genetics / Q000276:immunology*; D006684:HLA-DR Antigens / Q000096:biosynthesis* / Q000235:genetics; D006801:Humans; D007150:Immunohistochemistry; D017403:In Situ Hybridization; D009061:Mouth Mucosa / Q000276:immunology; D009062:Mouth Neoplasms / Q000235:genetics / Q000276:immunology*
chemical_list: D006684:HLA-DR Antigens