title: Association of Epstein-Barr virus with human immunodeficiency virus-negative peripheral T-cell lymphomas in Japan.
abstract: The association of Epstein-Barr virus (EBV) with human immunodeficiency virus-negative T-cell lymphoma was examined in 68 patients using the polymerase chain reaction (PCR) with DNA obtained from formalin-fixed paraffin-embedded tissues and an in situ hybridization technique. EBV-encoded RNA (EBER) was detected in 43 of 68 cases (63%) of peripheral T-cell lymphoma: in 100% (11 of 11 cases) of NK/T-cell lymphomas, 70% (14 of 20 cases) of angioimmunoblastic T-cell lymphomas (AILT) and 49% (18 of 37 cases) of other types of peripheral T-cell lymphoma. A positive band was also detected at high incidence (36 of 65 cases; 55%) in a PCR analysis using primers to detect the Bam HI-W fragment of EBV. In the immunohistochemical analysis using a monoclonal antibody to latent membrane protein 1 (LMP-1) of EBV, one of the EBV-encoded latent gene products, LMP-1, was found to be expressed in 13 of 64 cases (20%), but EBNA-2 was not expressed in all the cases examined (0 of 59 cases; 0%). The 5-yr survival rate was 28% for peripheral T-cell lymphomas overall, 0% for NK/T-cell lymphomas, 38% for AILTs and 28% for other types of peripheral T-cell lymphoma. The difference in the overall survival rate between NK/T-cell lymphoma and non-NK/T-cell lymphoma was significant (P = 0.0498 by Log-rank test). Among peripheral T-cell lymphoma patients overall, the group severely infected with EBV (EBER-ISH ++) had a lower 5-yr survival rate (8%) than the group slightly (EBER-ISH +) or not infected (38%; P = 0.0013).
authors.affiliation: Department of Hematology and Immunology, Kanazawa Medical University, Ishikawa, Japan. y-hirose@kanazawa-med.ac.jp
authors.forename: Yuko
authors.initials: Y
authors.lastname: Hirose
authors.forename: Yasufumi
authors.initials: Y
authors.lastname: Masaki
authors.forename: Toshioki
authors.initials: T
authors.lastname: Sawaki
authors.forename: Kumiko
authors.initials: K
authors.lastname: Shimoyama
authors.forename: Hiromi
authors.initials: H
authors.lastname: Karasawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kawabata
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Fukushima
authors.forename: Noriyoshi
authors.initials: N
authors.lastname: Ogawa
authors.forename: Yuji
authors.initials: Y
authors.lastname: Wano
authors.forename: Hisanori
authors.initials: H
authors.lastname: Umehara
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001483:Base Sequence; D015342:DNA Probes; D005260:Female; D018023:HIV Seronegativity; D004854:Herpesvirus 4, Human / Q000302:isolation & purification*; D006801:Humans; D017403:In Situ Hybridization; D007564:Japan; D016399:Lymphoma, T-Cell / Q000821:virology*; D008297:Male; D008875:Middle Aged; D016612:Paraffin Embedding; D016133:Polymerase Chain Reaction
chemical_list: D015342:DNA Probes