title: Long-term C-cell-mediated immunity to Epstein-Barr virus in man. II. Components necessary for regression in virus-infected leukocyte cultures.
abstract: Regression of EB-virus-induced transformation occurs exclusively in cultures of leukocytes from seropositive donors. Studies have shown that the strength of regression could be assayed in terms of the proportion of T cells which must be added to the autologous EB virus-infected T-cell-depleted population in order to establish regression in the culture. The in vitro regression phenomenon was strongly T-cell-dependent but did not require the presence of either monocytes or, as a potential antigenic stimulus, the residual viral envelope material on the surface of virus-infected B cells. The T-cell-depleted population from seropositive donors sometimes transformed (7/60 cultures) without the experimental addition of virus. Regression appeared to be independent of cytotoxic mechanisms involving anti-viral antibodies and not to be mediated by soluble factors released into culture medium.
mesh_terms: D000328:Adult; D000914:Antibodies, Viral; D002472:Cell Transformation, Viral / Q000187:drug effects; D002478:Cells, Cultured; D004854:Herpesvirus 4, Human / Q000276:immunology*; D006801:Humans; D007962:Leukocytes / Q000276:immunology; D008213:Lymphocyte Activation / Q000187:drug effects; D009000:Monocytes / Q000276:immunology; D010206:Papain / Q000494:pharmacology; D013601:T-Lymphocytes / Q000276:immunology*; D013997:Time Factors
chemical_list: D000914:Antibodies, Viral; D010206:Papain