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- W1994913013 abstract "HIV-infected patients are at high risk of developing diffuse large B-cell lymphomas (DLBCL). It is currently unclear whether these lymphomas represent Epstein-Barr virus (EBV)-driven lymphoproliferations that develop in the setting of immunodeficiency, or whether these tumours are more closely related to the DLBCL seen in the general population. To clarify this issue, 12 HIV-related DLBCL from 11 patients were analysed for the presence of clonally rearranged and somatically mutated immunoglobulin heavy chain (IgH) genes and their association with EBV was determined. Eleven of the 12 tumour samples displayed monoclonal rearrangements of the IgH genes, with or without a moderate number of somatic mutations in the CDRII and in the FWIII regions (average four mutations). One patient presented two successive lesions; whereas the initial tumour showed an oligoclonal IgH rearrangement, the lymphoma at relapse proved to harbour a monoclonal B-cell population. Ten of 12 tumour samples expressed the EBV encoded small RNAs (EBERs), and six of these EBV-positive cases displayed, in addition, an expression of the EBV encoded nuclear antigen 2 (EBNA-2). The results obtained from HIV-related DLBCL are at variance to those described for DLBCL occurring in the general population, since the latter contain significantly more somatic IgH mutations in the CDRII and in the FWIII regions and are only rarely associated with EBV. It is concluded from these findings that HIV-related DLBCL represent a distinct group of B-cell lymphomas, a significant fraction of which most likely originates from EBV-driven lymphoproliferations, and that half of the cases derive from pre-germinal centre B-cells. Copyright © 1999 John Wiley & Sons, Ltd." @default.
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- W1994913013 date "1999-06-01" @default.
- W1994913013 modified "2023-09-25" @default.
- W1994913013 title "Common and HIV-related diffuse large B-cell lymphomas differ in their immunoglobulin gene mutation pattern" @default.
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- W1994913013 doi "https://doi.org/10.1002/(sici)1096-9896(199906)188:2<133::aid-path349>3.0.co;2-y" @default.
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