Interferon-γControl of EBV-Transformed B Cells: A Role for CD8+T Cells That Poorly Kill EBV-Infected Cells
- 1 March 2002
- journal article
- research article
- Published by Mary Ann Liebert Inc in Viral Immunology
- Vol. 15 (1) , 213-225
- https://doi.org/10.1089/088282402317340350
Abstract
Control of Epstein-Barr virus (EBV) infection requires CD8+ T cells. Surprisingly, many EBV-specific CD8+ T cells kill autologous EBV-transformed B lymphoblasts poorly. We investigated the effector functions used by poorly cytotoxic EBV-specific CD8+ D7 cloned T cells and by EBV-stimulated peripheral blood lymphocytes. D7 T cells did not inhibit B lymphoblast growth in long-term coculture, but prevented the outgrowth of newly infected autologous B cells. Optimally stimulated D7 T cells and EBV-stimulated peripheral blood lymphocytes produced interferon (IFN)-γ at levels that inhibited EBV-transformed B cell outgrowth. Inhibitory factor activity was neutralized by anti-IFN-γ monoclonal antibodies (mAb), but not by antibodies to several other cytokines. These data suggest an in vivo role for IFN-γ secreting EBV-specific CD8+ T cells.Keywords
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