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American Journal of Pathology, Vol 137, 517-522, Copyright © 1990 by American Society for Investigative Pathology

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Characterization of Epstein-Barr virus-induced lymphoproliferation derived from human peripheral blood mononuclear cells transferred to severe combined immunodeficient mice

M Okano, Y Taguchi, H Nakamine, SJ Pirruccello, JR Davis, KW Beisel, KL Kleveland, WG Sanger, RR Fordyce and DT Purtilo
Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha 68193-3135.

Mice with severe combined immunodeficiency (SCID) received 6 X 10(7) fresh human peripheral blood mononuclear cells (PBMC) intraperitoneally from Epstein-Barr virus (EBV)-seropositive and -seronegative donors. B95-8 EBV was inoculated intraperitoneally and intravenously to the mice 6 weeks after transfer of seronegative PBMC. Three of four mice transferred with PBMC from two EBV-seropositive donors and two of four mice from two EBV-seronegative donors inoculated with EBV developed fatal EBV-induced lymphoproliferative disease within 6 to 10 weeks. These tumors were oligoclonal or polyclonal by cytoplasmic immunoglobulin expression. Furthermore no consistent clonal chromosomal abnormalities were shown. Cell lines established from these tumors showed low cloning efficiency in soft agarose. In addition, latent membrane protein, B-lymphocyte activation antigen (CD23), and cell- adhesion molecules (ICAM-1, CD18) all were expressed in the EBV- positive infiltrating lymphoproliferative lesions in each mouse. These results suggest that lymphoid tumors are comparable to lymphoblastoid cell lines immortalized by EBV and are not malignant lymphomas such as Burkitt's lymphoma. This model may be useful for investigating mechanisms responsible for the growing numbers of lymphoproliferative diseases that are occurring in patients with inherited or acquired immunodeficiencies.

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