title: [Expression of p53 and flow cytometric analysis of DNA index and S-phase fraction in pterygium].
abstract: OBJECTIVE
  To study the expression of p53 and DNA index (DI) and S-phase fraction (SPF) in pterygium, and explore their contribution of pathogenesis of pterygium.
  
  
  METHODS
  Surgically excised pterygia of 84 cases (96 eyes) with newly developed pterygium and 30 samples of normal conjunctiva as control were collected for immunohistochemistry to detected the expression of p53. The DI value and the SPF value were detected in all specimens with FCM.
  
  
  RESULTS
  The expression of p53 in pterygium was significantly higher than that of normal conjunctiva (P < 0.001). The DI value and the SPF value in pterygium were higher than that of normal conjunctiva but without statistical significance (P > 0.05).
  
  
  CONCLUSIONS
  The high expression of p53 and high level of DI value and SPF value suggest the pathogenesis of pterygium may be out of balance of cell apoptosis and cell proliferation.
authors.affiliation: Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong 226001, China.
authors.forename: Ai-min
authors.initials: AM
authors.lastname: Sang
authors.forename: Hong
authors.initials: H
authors.lastname: Lu
mesh_terms: D000368:Aged; D017209:Apoptosis; D004247:DNA; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D008875:Middle Aged; D011625:Pterygium / Q000235:genetics* / Q000378:metabolism*; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism
chemical_list: D016159:Tumor Suppressor Protein p53; D004247:DNA