title: Survival of donor epithelial cells after limbal stem cell transplantation.
abstract: OBJECTIVE
  To determine the long-term fate of donor epithelial cells after limbal allograft transplantation.
  
  
  METHODS
  Corneal buttons and peripheral blood leukocytes were obtained at the time of penetrating keratoplasty from three patients who had undergone a successful limbal allograft transplantation. Microdissection was used to remove the corneal epithelial cells from the button. The presence of donor and recipient epithelial cells in each sample was determined by using PCR for DNA microsatellites. Phenotypic analysis of the epithelium was performed by immunohistochemistry.
  
  
  RESULTS
  Various patterns of DNA microsatellites were observed. Nonrecipient cells (presumed to be donor) were consistently detected in all three corneal buttons. In two of the three cases, recipient cells were also detected, whereas in the third case, exclusively donor epithelial cells were found at 3.5 years after limbal allograft transplantation. Mild T-lymphocytes and macrophages were observed in one of the corneal buttons.
  
  
  CONCLUSIONS
  This study provides evidence for the persistence of donor epithelial cells up to 3.5 years after limbal allograft transplantation and supports the use of systemic immunosuppressive therapy.
authors.affiliation: National Eye Institute, National Institutes of Health, Building 10, Room 10N112, 10 Center Drive, Bethesda, MD 20892, USA. djaliliana@nei.nih.gov
authors.forename: Ali R
authors.initials: AR
authors.lastname: Djalilian
authors.forename: Sankaranarayana P
authors.initials: SP
authors.lastname: Mahesh
authors.forename: Christian A
authors.initials: CA
authors.lastname: Koch
authors.forename: Robert B
authors.initials: RB
authors.lastname: Nussenblatt
authors.forename: Defen
authors.initials: D
authors.lastname: Shen
authors.forename: Zhengpin
authors.initials: Z
authors.lastname: Zhuang
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Holland
authors.forename: Chi-Chao
authors.initials: CC
authors.lastname: Chan
mesh_terms: D000368:Aged; D002470:Cell Survival / Q000502:physiology; D004247:DNA / Q000032:analysis; D004847:Epithelial Cells / Q000166:cytology* / Q000378:metabolism; D019573:Epithelium, Corneal / Q000166:cytology* / Q000378:metabolism; D005260:Female; D006801:Humans; D015948:Keratoplasty, Penetrating; D016850:Limbus Corneae / Q000166:cytology*; D008264:Macrophages / Q000473:pathology; D008297:Male; D018895:Microsatellite Repeats; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D033581:Stem Cell Transplantation; D013234:Stem Cells / Q000166:cytology* / Q000378:metabolism; D013601:T-Lymphocytes / Q000473:pathology; D014019:Tissue Donors; D014184:Transplantation, Homologous
chemical_list: D004247:DNA