ANTI-TUMOR ACTIVITIES OF GELATIN

Previously we have shown that bovine bone (BB) gelatin stimulated proliferation of murine spleen cells in vitro [1]. BB and porcine skin (PS) gelatins stimulated murine peritoneal macrophages (mPMs) to secrete several cyokines, e. g., interleukin (IL)-6, IL-12, TNF-α and MCP-1 [2]. PS gelatin suppressed proliferation of cells of human as well as murine cell lines [1, 3, 4]. Recently we observed that PS gelatin stimulated murine anti-tumor peritoneal macrophages [5]. The ability of PS gelatin to induce anti-tumor peritoneal macrophages was greater than LPS or interferon-γ (IFN-γ). In this study, we investigated whether or not three kinds of gelatin including PS gelatin exerted anti-tumor activity in vivo.

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