title: Epstein-Barr virus strain type and latent membrane protein 1 gene deletions in lymphomas in patients with rheumatic diseases.
abstract: OBJECTIVE
  Recent studies have shown that immunomodulatory therapy for the treatment of rheumatic diseases can be associated with the development of Epstein-Barr virus (EBV)-associated lymphoproliferative disorders. The present study was undertaken to determine the strain type of EBV in lymphoproliferative disorders that occur in patients with rheumatic disease and to investigate EBV latent membrane protein 1 (LMP-1) gene deletions that occur in these lymphoproliferative disorders.
  
  
  METHODS
  Ten EBV-associated lymphoid neoplasms in patients with rheumatoid arthritis or dermatomyositis were analyzed by polymerase chain reaction to determine EBV strain type and to investigate for the presence of a previously characterized 30-basepair deletion in the LMP-1 gene.
  
  
  RESULTS
  The results indicated that lymphoproliferative disorders in these patients can harbor EBV strain type A or B, with a predominance of type A infection (80%). It was also shown that both wild-type and mutated LMP-1 genes can be found in these neoplasms, with the deleted form of the LMP-1 gene occurring in one-third of cases in this series.
  
  
  CONCLUSIONS
  LMP-1 deletions associated with certain aggressive lymphoid neoplasms are not required for the genesis of lymphoproliferative disorders in patients with rheumatic disease. The relative frequencies of type A and type B EBV strains in these lymphoproliferative disorders show similarities to the frequencies in patients with post-solid organ transplantation immunosuppression-associated lymphoproliferative disorders.
authors.affiliation: Stanford University School of Medicine, California, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Natkunam
authors.forename: K S
authors.initials: KS
authors.lastname: Elenitoba-Johnson
authors.forename: D W
authors.initials: DW
authors.lastname: Kingma
authors.forename: O W
authors.initials: OW
authors.lastname: Kamel
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001172:Arthritis, Rheumatoid / Q000235:genetics; D003882:Dermatomyositis / Q000235:genetics; D004587:Electrophoresis, Agar Gel; D005260:Female; D005784:Gene Amplification; D017353:Gene Deletion; D004854:Herpesvirus 4, Human / Q000737:chemistry; D006689:Hodgkin Disease / Q000150:complications; D006801:Humans; D016403:Lymphoma, Large B-Cell, Diffuse / Q000150:complications / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009856:Oncogene Proteins, Viral / Q000235:genetics; D016133:Polymerase Chain Reaction; D012216:Rheumatic Diseases / Q000150:complications / Q000235:genetics*; D014763:Viral Matrix Proteins / Q000235:genetics*
chemical_list: C037662:EBV-associated membrane antigen, Epstein-Barr virus; D009856:Oncogene Proteins, Viral; D014763:Viral Matrix Proteins