Dissection of human allostimulatory determinants with cloned T cells: stimulation inhibition by monoclonal antibodies TU22, 34, 35, 36, 37, 39, 43, and 58 against distinct human MHC class II molecules.
Alloantigenic determinants causing secondary lymphoproliferative responses of primed T cells were investigated by blocking stimulation with monoclonal antibodies TU22, 34, 35, 36, 37, 39, 43, and 58 binding differentially to HLA-DR and SB or MB associated molecules. In particular, the use of cloned and functionally defined T cell responders greatly facilitated the assignment of stimulator-level inhibition caused by these antibodies. Thus, a novel way of functional "mapping" for stimulatory epitopes for sets of clones with restimulation specificities associated with HLA-D, SB, MB, or hitherto unidentified class II determinants is presented here. This considerably helps to elucidate the distinct immunoregulatory roles of the three major class II alloantigen systems thus far defined.
D000911:Antibodies, Monoclonal / Q000276:immunology*; D002999:Clone Cells / Q000276:immunology; D006682:HLA-DP Antigens; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II / Q000235:genetics / Q000276:immunology*; D006801:Humans; D008213:Lymphocyte Activation; D013601:T-Lymphocytes / Q000276:immunology*
D000911:Antibodies, Monoclonal; D006682:HLA-DP Antigens; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II