title: Three-dimensional xenograft model of dysplastic human laryngeal mucosa.
abstract: OBJECTIVE
  Development of new therapeutic interventions in head and neck squamous cell carcinoma (HNSCC) will be facilitated by a model system that incorporates the ease of manipulation found in current tissue culture systems while retaining the three dimensional architecture that defines these malignancies.
  
  
  METHODS
  Original scientific investigation.
  
  
  METHODS
  We describe a modification of a normal respiratory mucosa model system which recreates premalignant mucosal histology. Grossly normal appearing human mucosa is harvested from laryngectomy specimens, the mucosal epithelium selectively removed by protease treatment and placed in conventional tissue culture. After 7 days, the cells are seeded into denuded rat tracheas, which are in turn implanted in flank pockets of athymic nu/nu mice. The tracheas are incubated for three weeks, removed and the mucosa examined histologically.
  
  
  RESULTS
  As originally described, normal pseudostratified squamous epithelium can be re-established in this system. Using human dysplastic mucosa as a starting material, mucosal histologies of respiratory dysplasia, squamous metaplasia, squamous dysplasia and squamous carcinoma in situ can be established.
  
  
  CONCLUSIONS
  This system will provide a paradigm for future therapeutic interventions to modify the progression of squamous metaplasia to dysplasia, carcinoma in situ and invasive squamous cell carcinoma.
authors.affiliation: Division of Otolaryngology-Head and Neck Surgery, University of North Carolina at Chapel Hill, 27599, USA.
authors.forename: C G
authors.initials: CG
authors.lastname: Shores
authors.forename: W G
authors.initials: WG
authors.lastname: Yarbrough
mesh_terms: D000818:Animals; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D004847:Epithelial Cells / Q000473:pathology; D006801:Humans; D007150:Immunohistochemistry; D007830:Larynx / Q000473:pathology*; D008679:Metaplasia / Q000473:pathology; D051379:Mice; D008819:Mice, Nude; D009092:Mucous Membrane / Q000473:pathology; D009374:Neoplasms, Experimental; D051381:Rats; D014183:Transplantation, Heterologous