title: Gene expression profiling of Epstein-Barr virus-positive and -negative monomorphic B-cell posttransplant lymphoproliferative disorders.
abstract: Although most posttransplant lymphoproliferative disorders (PTLD) are related to Epstein-Barr virus (EBV) infection, approximately 20% lack detectable EBV (EBV-). It is uncertain whether the latter cases are truly distinct from EBV+ PTLD or possibly relate to another infectious agent. This study used gene expression profiling to further investigate the relationship between EBV+ and EBV- monomorphic B-cell PTLD, and to search for clues to their pathogenesis. Affymetrix HU133A GeneChips were used to compare 4 EBV+ and 4 EBV- cases of monomorphic B-cell PTLD. Hierarchical clustering successfully distinguished the EBV+ and EBV- groups. Relative to EBV- PTLD, 54 transcripts were over-expressed in EBV+ PTLD. The transcripts identified included IRF7 (a known regulator of EBV LMP1 expression), EBI2 (EBV-induced gene 2), and 3 that are interferon induced (MX1, IFITM1, and IFITM3). In addition, the EBV+ group contained 232 transcripts decreased relative to the EBV- group, including changes concordant with those previously reported after EBV infection of cultured B-cell lines. In summary, in a small group of monomorphic B-cell PTLD, EBV+ cases demonstrated a subset of gene expression changes associated with EBV infection of B cells. By contrast, EBV- PTLD lacked viral-associated changes suggesting that they are biologically distinct.
authors.affiliation: Division of Hematopathology, Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA. craigfe@upmc.edu
authors.forename: Fiona E
authors.initials: FE
authors.lastname: Craig
authors.forename: Lawrence R
authors.initials: LR
authors.lastname: Johnson
authors.forename: Stephen A K
authors.initials: SA
authors.lastname: Harvey
authors.forename: Michael A
authors.initials: MA
authors.lastname: Nalesnik
authors.forename: Jianhua H
authors.initials: JH
authors.lastname: Luo
authors.forename: Soumyaroop D
authors.initials: SD
authors.lastname: Bhattacharya
authors.forename: Steven H
authors.initials: SH
authors.lastname: Swerdlow
mesh_terms: D000328:Adult; D000368:Aged; D001402:B-Lymphocytes / Q000473:pathology; D004279:DNA, Viral / Q000032:analysis; D020031:Epstein-Barr Virus Infections / Q000150:complications / Q000235:genetics*; D005260:Female; D020869:Gene Expression Profiling; D006801:Humans; D007150:Immunohistochemistry; D008232:Lymphoproliferative Disorders / Q000235:genetics* / Q000821:virology*; D008297:Male; D008875:Middle Aged; D016377:Organ Transplantation / Q000009:adverse effects*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014764:Viral Proteins / Q000235:genetics / Q000378:metabolism
chemical_list: D004279:DNA, Viral; D014764:Viral Proteins