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Comparative Study
. 2000 Dec;91(12):1233-40.
doi: 10.1111/j.1349-7006.2000.tb00909.x.

The characteristics of Epstein-Barr virus (EBV)-positive diffuse large B-cell lymphoma: comparison between EBV(+) and EBV(-) cases in Japanese population

T Kuze  1 , N Nakamura, Y Hashimoto, Y Sasaki, M Abe
Affiliations
Comparative Study

The characteristics of Epstein-Barr virus (EBV)-positive diffuse large B-cell lymphoma: comparison between EBV(+) and EBV(-) cases in Japanese population

T Kuze et al. Jpn J Cancer Res. 2000 Dec.

Abstract

We have investigated 114 cases with diffuse large B-cell lymphoma (DLBCL) to clarify the characteristics of DLBCL with Epstein-Barr virus (EBV) infection. Thirteen cases (11.4%) showed EBV-encoded RNA 1 (EBER1) signals by RNA in situ hybridization. EBV-encoded latent membrane protein 1 (LMP1) and EBV-encoded nuclear antigen 2 (EBNA2) were expressed in 11 and 4 cases, respectively. Expression of CD30, Bcl-6 and immunoglobulin (Ig) was found in 92%, 31% and 23% with EBV(+) DLBCL, and in 15%, 79% and 82% with EBV(-) DLBCL, respectively. The sequence of rearranged Ig heavy chain (IgH) variable (V) region gene was analyzed in 5 cases with EBV(+) DLBCL and 61 cases with EBV(-) DLBCL. Somatic mutation was found in all cases except one with EBV(-) DLBCL. Average mutation frequency was 9.6% in EBV(+) DLBCL vs. 11.5% in EBV(-) DLBCL. The rates of replacement mutation vs. silent mutation (R / S values) in complementarity determining region II and framework region III were 2.7 and 1.5 in EBV(+) DLBCL, 2.6 and 1.4 in EBV(-) DLBCL. Crippling mutation generating a stop codon was found in 2 of 5 cases (40%) with EBV(+) DLBCL, but none of 61 cases (0%) with EBV(-) DLBCL. These findings suggest that EBV(+) DLBCL and EBV(-) DLBCL were both derived from germinal center (GC) or post-GC B cells, and EBV(+) DLBCL frequently have a non-functional IgH gene owing to crippling mutation.

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