T cell-mediated immunity to oncornavirus-induced tumors. IV. Preliminary evidence for a specific suppression of anti-Moloney cell-mediated immune response by autoimmune T cells

European Journal of Immunology
J C LeclercP Debré

Abstract

Previous reports have demonstrated that adult C57BL/6 mice infected with murine sarcoma virus (MSV) develop a strong cell-mediated immune response against Friend, Moloney, Rauscher virus-induced type-specific (FMR) antigens and reject their tumors. To demonstrate a possible role for auto-anti-MSV T blasts, syngeneic C57BL/6 mice were immunized with highly enriched anti-FMR cytolytic T cells. One of 3 pools of these autoimmune T cells prepared from 12 surviving immunized mice (a) inhibited specifically the in vitro anti-MSV cytolysis generation and (b) enhanced drastically the MSV tumor growth in vivo. The possibility for such an immunization procedure to induce anti-idiotype T cells, the repeatability of this effect and the relationship of the suppressor cells with antigen-specific suppressor cells and other components of the anti-MSV immune response are discussed.

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