title: [Research on inhibition of areca nut extract on human buccal keratinocytes].
abstract: OBJECTIVE
  To culture human oral mucosa epithelial cells in vitro and study the mechanism of changes in the epithelia of oral submucous fibrosis (OSF).
  
  
  METHODS
  The keratinocytes were obtained from normal buccal mucosa (NM-KC) and OSF buccal mucosa (OSF-KC) with dispase trypsine and cultured in vitro. Then the cell proliferation of keratinocytes incubated with or without areca nut extract in the presence of 10% fetal calf serum for 48 hours at 37 degrees C in 5% CO2 and air were monitored by use of thiazolyl blue (MTT) assay.
  
  
  RESULTS
  Primary culture grew in small islands that coalesced at confluency. Ultrastructurally the cells contained a large of tonofilament and microvilli. Immunohistochemistry demonstrated uniform staining of the cells with antibodies to keratins. There was no difference in cell proliferation between OSF-KC and NM-KC, and areca nut extract inhibited keratinocyte proliferation in a concentration-dependent manner.
  
  
  CONCLUSIONS
  The results suggested that utilizing dispase II can establish fibroblast-free culture for growing of human oral mucosa keratinocytes and areca nut extract is a cytotoxic agent to human buccal keratinocytes.
authors.affiliation: Department of Stomatology, Second Affiliated Hospital, Hunan Medical University.
authors.forename: Y
authors.initials: Y
authors.lastname: Feng
authors.forename: T
authors.initials: T
authors.lastname: Ling
mesh_terms: D001114:Areca / Q000737:chemistry*; D002455:Cell Division; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D006801:Humans; D015603:Keratinocytes / Q000187:drug effects* / Q000648:ultrastructure; D009061:Mouth Mucosa / Q000166:cytology / Q000187:drug effects*; D009914:Oral Submucous Fibrosis / Q000473:pathology*; D010936:Plant Extracts / Q000633:toxicity
chemical_list: D010936:Plant Extracts