Hepatitis C virus, B-cell proliferation and lymphomas.

Abstract:

:Accumulating evidence support a role for hepatitis C virus (HCV) in the pathogenesis of human lymphoproliferative disorders. Clonal expansions of B lymphocytes have been prevalently detected in the bone marrow, in the liver and in the peripheral blood of HCV-infected patients. Epidemiologic studies have associated HCV infection with an increased risk of B-cell lymphoma development, particularly of those with primary localization to organs target of HCV infection. The analysis of the B-cell receptor variable region sequences in sequential phases of HCV-associated lymphomas provided evidence of an ongoing somatic mutation process still present in the neoplastic cells. A restricted repertoire of V, D, J genes was used to assemble the B-cell receptor, and a frequent occurrence of certain gene combinations (V1-69/D3-22/J4 heavy chain with a V3-20 encoded light chain; V3-7/D3/J3 heavy chain with V3-15/J1 light chain; V3-231D3-22/J4 or V4-59/D2-15/J2 with a V3-20 light chain) was observed, thus suggesting a common antigen-binding specificity for these B-cell clones. The high similarity to antibodies with rheumatoid factor (RF) activity as well as to anti-HCV E2 antibodies suggested that HCV, alone or in complex with IgG, could play a pathogenetic role as an exogenous trigger in certain stages of B-cell lymphoproliferation and in certain subsets of B-cell non-Hodgkin's lymphomas (NHLs). The restricted gene repertoire used to assemble the B-cell receptor observed in HCV-associated B-cell NHLs could have important implications as an antigenic target in anti-tumor immunologic therapies.

journal_name

Leuk Lymphoma

journal_title

Leukemia & lymphoma

authors

Gasparotto D,De Re V,Boiocchi M

doi

10.1080/10428190290016845

keywords:

subject

Has Abstract

pub_date

2002-04-01 00:00:00

pages

747-51

issue

4

eissn

1042-8194

issn

1029-2403

journal_volume

43

pub_type

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