The major histocompatibility complex-restricted antigen receptor on T cells. IX. Role of accessory molecules in recognition of antigen plus isolated IA.
Antibody inhibition studies were done to determine which molecules on the surface of the T cell hybridomas other than their receptors for antigen plus IAd were involved in interaction with antigen-presenting B cells, with artificial IAd membranes on glass beads, or with anti-receptor antibodies coupled to Sepharose beads. We found that T cell LFA-1 was only involved when B cells were used to present antigen plus IAd, whereas T cell L3T4 was involved in the response of T cells to antigen plus IAd either on cells or in artificial membranes, but not if anti-receptor antibodies were used to stimulate the T cells. From these results we concluded that LFA-1 may be involved in the recognition of a ligand on cells that was not present in artificial membranes, but that L3T4 might interact with a nonpolymorphic portion of class II molecules present in both intact antigen-presenting cells and the antigen-presenting artificial membranes.
D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D000938:Antigen-Presenting Cells / Q000276:immunology*; D000954:Antigens, Surface / Q000276:immunology; D005898:Glass; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D016169:Lymphocyte Function-Associated Antigen-1; D008285:Major Histocompatibility Complex; D051379:Mice; D011948:Receptors, Antigen, T-Cell / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology
D000911:Antibodies, Monoclonal; D000954:Antigens, Surface; D000949:Histocompatibility Antigens Class II; D016169:Lymphocyte Function-Associated Antigen-1; D011948:Receptors, Antigen, T-Cell