title: Cytolysis of autologous fresh osteosarcoma cells by human cytotoxic T lymphocytes propagated with T cell growth factor.
abstract: Cytotoxic T lymphocytes (CTL) against autologous fresh osteosarcoma cells were generated in mixed lymphocyte tumor culture (MLTC), and then were propagated and maintained for up to 19 days with culture medium containing T cell growth factor (TCGF). CTL generated with MLTC and propagated with TCGF (TCGF-CL) lysed fresh autologous osteosarcoma cells, but not autologous phytohemagglutinin-blastoid lymphocytes. More than 90% of the propagated lymphoblastoid cells were E-rosette forming cells. A subpopulation of TCGF-CL was Leu-2a positive and Leu-3a negative CTL. The cytotoxic activity to the autologous tumor detected by 51Cr release assay was not blocked by cold allogeneic tumor cells from 4 out of 5 patients tested. Human leukocyte antigen and chromosomes of TCGF-CL showed no abnormality.
mesh_terms: D000293:Adolescent; D002462:Cell Membrane / Q000276:immunology; D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic; D005260:Female; D006801:Humans; D007376:Interleukin-2 / Q000276:immunology*; D008854:Microscopy, Electron; D012516:Osteosarcoma / Q000276:immunology*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology* / Q000648:ultrastructure; D013936:Thymidine
chemical_list: D007376:Interleukin-2; D013936:Thymidine