title: Epstein-barr nuclear antigen-1 (EBNA-1) in diffuse large B-cell lymphoma and its relationship to the bcl-2 protein.
abstract: OBJECTIVE
  To determine EBNA-1 expression in the tissue of patients with diffuse large B-cell lymphoma and its relationship to bcl-2 expression.
  
  
  METHODS
  Paraffin-embedded tissue from 24 cases of diffuse large B-cell lymphoma were stained immunohisto chemically with monoclonal antibody anti-EBNA-1 and anti-bcl-2 using Streptavidin Biotin Complex method. The bcl-2 expression was measured as negative (no staining), positive 1 (weak staining), and positive 2 (moderate to strong staining). The relationship between the immunohisto chemistry results was examined.
  
  
  RESULTS
  From the 24 samples, 12 (50%) were EBNA-1 positive and 14 (58.3%) showed expression of bcl-2. Eleven of the 14 samples (90%) showed expression of bcl-2 were EBNA-1 positive, while only 3 of these samples (10%) were EBNA-1 negative. The relationship between bcl-2 expression and EBNA-1 was statistically significant (Chi square-uncorrected 11.2571, p= 0.0036).
  
  
  CONCLUSIONS
  Our results showed that 50% of diffuse large B-cell lymphoma were EBNA-1 positive. Furthermore, EBNA-1 seemed to be correlated with bcl-2 expression.
authors.affiliation: Department of Internal Medicine, Faculty of Medicine, Gadjah Mada University, Yogyakarta, Indonesia.
authors.forename: Ibnu
authors.initials: I
authors.lastname: Purwanto
authors.forename: Johan
authors.initials: J
authors.lastname: Kurnianda
authors.forename: Susanna Hilda
authors.initials: SH
authors.lastname: Hutajulu
authors.forename: Kartika
authors.initials: K
authors.lastname: Widayati
authors.forename: Mohammad
authors.initials: M
authors.lastname: Rizki
mesh_terms: D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D019309:Epstein-Barr Virus Nuclear Antigens / Q000378:metabolism*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D016393:Lymphoma, B-Cell / Q000276:immunology* / Q000378:metabolism* / Q000473:pathology; D016403:Lymphoma, Large B-Cell, Diffuse / Q000276:immunology* / Q000378:metabolism* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000378:metabolism*
chemical_list: D019309:Epstein-Barr Virus Nuclear Antigens; D019253:Proto-Oncogene Proteins c-bcl-2