Two populations of lymphocytes involved in phytohaemagglutinin-induced cytotoxicity of a dividing target cell.
A quantitative study of the surface characteristics of cells cytotoxic against Chang cells permits the following conclusions: [1] In the presence of phytohaemagglutinin two types of cell are involved; one has Fc receptors and the other does not. Approximately two thirds of the cytotoxic activity is lost if the Fc-receptor-bearing cells are removed. [2] Both spontaneous and antibody-induced cytotoxicity is almost completely abolished by removal of Fc-receptor-bearing cells. [3] None of the cytotoxic activity, spontaneous or induced, appears to be mediated by cells that are plastic-adherent or bear surface immunoglobulin. These results are compared with similar studies by other authors.
D000418:Albumins / Q000276:immunology; D003601:Cytotoxicity Tests, Immunologic; D006801:Humans; D007111:Immunity, Cellular; D007141:Immunoglobulin Fc Fragments; D037102:Lectins; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology*; D011947:Receptors, Antigen, B-Cell / Q000032:analysis
D000418:Albumins; D007141:Immunoglobulin Fc Fragments; D037102:Lectins; D011947:Receptors, Antigen, B-Cell