title: In situ cytotoxic T cells in a methylcholanthrene-induced tumor.
abstract: The in situ localization of cytotoxic T-cells was examined in a methylcholanthrene-induced fibrosarcoma. The MCA 2 tumor was initiated in this laboratory and utilized before extensive in vivo passage. Tumor cell suspensions were separated by unit velocity sedimentation. The T cell-enriched tumor-derived fractions and spleen cells from MCA 2-bearing mice were cytotoxic for in vivo isolated MCA 2 and in vitro cultured MCA 2 tumor cells, but not for SAD2 tumor cells. The cytotoxic activity of effector cells isolated from MCA 2 tumors was abrogated by treatment with anti-theta serum plus complement. The significance of cytotoxic T cells with in a progressing tumor is discussed.
mesh_terms: D000818:Animals; D003602:Cytotoxicity, Immunologic; D005260:Female; D005354:Fibrosarcoma / Q000209:etiology*; D008748:Methylcholanthrene; D051379:Mice; D008811:Mice, Inbred DBA; D013601:T-Lymphocytes / Q000276:immunology*; D013997:Time Factors
chemical_list: D008748:Methylcholanthrene