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  • Title: Epstein-Barr virus (EBV)-induced B-cell proliferative disorder after chemotherapy in a patient with hemophagocytic lymphohistiocytosis with associated EBV-induced T-cell proliferation.
    Author: Suzumiya J, Ohshima K, Kanda M, Kumagawa M, Nagano M, Hirata M, Nawa Y, Tamura K, Kikuchi M.
    Journal: Leuk Lymphoma; 2000 May; 37(5-6):593-604. PubMed ID: 11042520.
    Abstract:
    We report a case of Epstein-Barr virus (EBV)-associated lymphoproliferative disorder (LPD) which developed after chemotherapy for hemophagocytic lymphohistiocytosis (HLH), who had no history of immunodeficiency or familial X-linked LPD. In HLH, the presence of EBV in T-cells was confirmed by a combination of in situ hybridization (ISH) and immunostaining. Southern blot analysis using EBV-TR and immunoglobulin JH probes revealed oligoclonal proliferation of B-cells in each organ involved by abnormal B-lymphoid cells at autopsy. Combined ISH and immunostaining disclosed the presence of EBV in proliferating B-cells. Cytokine analysis during the period of T-cell activation in HLH revealed marked elevation of interferon (IFN) gamma, interleukin (IL)-10 and soluble IL-2 receptor (sIL-2R) and mild to moderate increases of tumor necrosis factor (TNF)-alpha were observed, while IFN gamma, IL-10 and sIL-2R were elevated initially during the HLH phase, which then decreased as LPD developed and B-cell proliferation predominated. Immunosuppressive chemotherapy for HLH may then have allowed latent EBV in B lymphocytes to induce transformation and oligoclonal proliferation of B-cells, finally resulting in LPD. Mechanisms of EBV-induced cell proliferation remain unclear, but alteration of various cytokines may be responsible for it.
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