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  • Title: Induction of T cell dependent acquired immunity in syngeneic mice by the combined expression of interleukin-4 and granulocyte macrophage-colony stimulating factor gene in murine colon carcinoma cells.
    Author: Tasaki K, Gunji Y, Matsubara H, Takenaga K, Suzuki T, Asano T, Ochiai T, Isono K, Kouzu T, Sakiyama S, Tagawa M.
    Journal: Anticancer Res; 1998; 18(3A):1453-6. PubMed ID: 9673355.
    Abstract:
    The inoculation of cytokine-producing tumor cells into syngeneic animals can produce antitumor effects. We previously reported that injection of a mixed population of murine colon carcinoma (Colon 26) cells transduced with interleukin-4 (IL-4) gene with granulocyte macrophage-colony stimulating factor (GM-CSF) gene developed subcutaneous tumors in syngeneic mice, but these tumors thereafter regressed spontaneously (Oncology 1997;54:69-73). In this study, we found the generation of tumor-specific acquired immunity in the mice which had rejected the tumors of a mixed population of IL-4 and GM-CSF producer cells, and that the immunity was mediated by mature T cells. Moreover, local secretion of both IL-4 and GM-CSF in the vicinity of tumors was found to be crucial for this rejection. These data suggest that enhanced host defense brought about by the combined expression of IL-4 and GM-CSF genes in tumor cells is a potential therapeutic strategy.
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