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  • Title: Host CD4+ T lymphocytes are required for the synergistic action of interferon-alpha/beta and adoptively transferred immune cells in the inhibition of visceral ESb metastases.
    Author: Kaido TJ, Maury C, Gresser I.
    Journal: Cancer Res; 1995 Dec 15; 55(24):6133-9. PubMed ID: 8521404.
    Abstract:
    Effective adoptive immunotherapy of immunocompetent DBA/2 mice challenged i.v. with the highly metastatic ESb T-cell lymphoma required the combined treatment of recipient mice with tumor-sensitized spleen cells and IFN-alpha/beta. In contrast, immune spleen cells and IFN-alpha/beta treatment did not increase the survival time of ESb-injected DBA/2-nu/nu mice, DBA/2-bg/bg mice, or normal DBA/2 mice injected with antibody to CD4. Treatment of immunocompetent DBA/2 mice with antibody to asialo-GM1, silica, dichloromethylene diphosphonate-containing liposomes, or 500 rads whole-body gamma-irradiation did not diminish the antimetastatic action of ESb-immune cells and IFN-alpha/beta. These results indicate that adoptively transferred immune T lymphocytes and IFN-alpha/beta act together with host CD4+ T lymphocytes/factors to inhibit ESb visceral metastases. Combined treatment with ESb-immune cells together with interleukin-1 beta (IL-1 beta), IL-2, tumor necrosis factor-alpha, or granulocyte-macrophage colony-stimulating factor did not increase the survival time of normal DBA/2 mice challenged with ESb cells. In contrast, IL-12, which had only a slight antimetastatic effect when administered alone, did synergize with ESb-immune spleen cells and increased the survival time of ESb-challenged mice to a similar extent as did IFN-alpha/beta and immune spleen cells. Treatment of DBA/2 mice with potent antibody to IFN-alpha/beta did not abrogate the capacity of IL-12 and ESb-immune spleen cells to inhibit ESb metastases. Unlike immunotherapy with ESb-immune cells and IFN-alpha/beta, ESb-immune cells together with IL-12 inhibited ESb metastases in immunodeficient DBA/2-bg/bg mice.
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