title: Characterization of murine T cell activation signals produced by B lymphoma cells.
abstract: The activation requirements of alloreactive and antigen reactive murine T cells were examined by stimulating class II restricted T cell clones with monoclonal B lymphoma cells. One B lymphoma cell line (T27A) was found to stimulate IL 2 release from some alloreactive T cell clones without stimulating any significant T cell proliferation response. The same B lymphoma cells are capable of stimulating IL 2 release and proliferative responses from other T cell clones. Evidence is presented suggesting that B lymphoma cell stimulation of these T cell clones is largely IL 1 independent and that at least some T cell clones may require activation signals other than Ia, antigen, and IL 1. The addition of exogenous, purified IL 1 to the T cell activation assays was found to have a wide range of stimulatory effects on the proliferative responses of different T cell clones. The absence of comparable IL 1-induced stimulation of IL 2 secretion suggests that IL 1 primarily enhances antigen specific T cell proliferation through mechanisms other than acting as a co-stimulant for IL 2 release.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology*; D002460:Cell Line; D002999:Clone Cells / Q000276:immunology; D000949:Histocompatibility Antigens Class II; D007375:Interleukin-1 / Q000502:physiology; D007376:Interleukin-2 / Q000096:biosynthesis; D007941:Leukemia P388 / Q000276:immunology; D008213:Lymphocyte Activation / Q000187:drug effects; D008223:Lymphoma / Q000276:immunology*; D051379:Mice; D008811:Mice, Inbred DBA; D009439:Neuraminidase / Q000494:pharmacology; D010455:Peptides / Q000378:metabolism; D013601:T-Lymphocytes / Q000276:immunology* / Q000378:metabolism
chemical_list: D000949:Histocompatibility Antigens Class II; D007375:Interleukin-1; D007376:Interleukin-2; D010455:Peptides; D009439:Neuraminidase