title: A rapid technique for isolation of viable tumor cells from solid tumors: use of the tumor cells for induction and measurement of cell-mediated cytotoxic responses.
abstract: A rapid and simple technique for the isolation of viable tumor cells from human and mouse solid neoplasms is described. It consists of a 5 to 10-min treatment with trypsin-collagenase-DNase mixture, followed by mechanical disaggregation of the tumor tissue and subsequently by a brief centrifugation on a discontinuous Percoll gradient. With the tumors employed, this procedure usually requires less than 1 hr and results in preparations comprising greater than 80% tumor cells with viability of 80-90%. Cell-mediated cytotoxic response was measured with: (a) unsensitized lymphocytes freshly obtained from tumor-bearing hosts; (b) lymphocytes propagated in culture with T cell growth factor; and (c) lymphocytes stimulated in cocultures with autologous or syngeneic tumor cells. The cytotoxic activity was assessed in a modified [51Cr]-release assay adapted for solid tumor cells, allowing a long incubation period (24 hr) and the use of a low number (200-1000) of highly labeled target cells (2-10 counts/min/cell).
mesh_terms: D000818:Animals; D002469:Cell Separation / Q000379:methods*; D003602:Cytotoxicity, Immunologic; D006801:Humans; D007111:Immunity, Cellular; D007376:Interleukin-2; D008214:Lymphocytes / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D009369:Neoplasms / Q000276:immunology / Q000473:pathology*; D009374:Neoplasms, Experimental / Q000276:immunology / Q000473:pathology
chemical_list: D007376:Interleukin-2