title: Colony formation of cytolytic T cells in semisolid medium.
abstract: Addition of supernatant from concanavalin A-stimulated spleen cells to in vitro primed cytolytic T lymphocytes in semisolid medium stimulated the growth of colonies of cytolytic lymphocytes. Optimal results were obtained using a peritoneal adherent cell underlayer where a 10% plating efficiency (greater than or equal to 4 cells per colony) was achieved when between 5000 and 100 000 cells were plated per dish. Individual colonies were harvested and tested in a short term (5h) 51Cr release microassay, employing 200 target cells. The frequency of lytic colonies varied from 46--67%. The observed lytic activities were specific for the relevant allogeneic target cells.
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D002999:Clone Cells / Q000276:immunology*; D003433:Crosses, Genetic; D003470:Culture Media / Q000494:pharmacology; D003601:Cytotoxicity Tests, Immunologic; D003602:Cytotoxicity, Immunologic; D005260:Female; D051379:Mice; D008806:Mice, Inbred AKR; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D013154:Spleen / Q000378:metabolism; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D003470:Culture Media