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Minerva Gastroenterologica e Dietologica 2005 June;51(2):165-70

Copyright © 2005 EDIZIONI MINERVA MEDICA

language: English

Frequency of bcl-2/IgH translocation in patients with non-Hodgkin’s lymphoma and chronic hepatitis C virus infection

Libra M., De Re V., Gloghini A., Callari D., Malaponte G., Travali S., Mazzarino M. C., Stivala F., Boiocchi M., Carbone A.


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Aim. It has been previously suggested that t(14;18) translocation of bcl-2 to the immuno-globulin heavy chain (IgH) locus may contribute to pathogenesis of lymphoproliferative disorders related to hepatitis C virus (HCV) infection, including type II mixed cryoglobulinemia (MC).
Methods. In this study, the presence or absence of t(14;18) translocation was determined in tumor biopsy specimens and peripheral blood mononuclear cells (PBMCs) for 48 NHL patients with chronic HCV infection.
Results. In tumor biopsy specimens from 32 HCV-positive NHL patients, bcl-2/IgH translocation was detected in 1 of 13 patients with MC syndrome (7.7%) and 3 of 19 patients without MC syndrome (15.8%). In PBMCs from 23 HCV-positive NHL patients, this translocation was observed in 3 of 6 patients with MC syndrome (50%) and 4 of 17 patients without MC syndrome (23.5%). Interestingly, bcl-2/IgH translocation was found in 2 extranodal marginal zone B-cell lymphoma tissues from HCV-infected patients.
Conclusion. However, additional studies are required to better clarify the relationship between this translocation and extranodal marginal zone B-cell lymphoma development. Although the frequency of bcl-2/IgH translocation in PBMCs from patients with chronic HCV infection is higher than that of other NHL patients, this increased translocation rate remains to be elucidated.

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