title: Avian antigen-binding cells. I. Characterization of antigen-binding T cells from bursectiomized chickens by autoradiography.
abstract: Antigen-binding cells (ABC) from spleens of HGG-immunized, bursectomized agammaglobulinemic (Bx) chickens were detected by direct autoradiography with 125I-HGG and by sandwich autoradiography with HGG plus 125I-goat-anti-HGG. The specificity of antigen binding was demonstrated by 1) inhibition of binding of 125I-HGG by preincubation with unlabeled HGG and 2) a specific increase in ABC after immunization. The ABC from Bx chickens were not B cells, as shown by the virtual absence of immunoglobulin-bearing cells in this population and by the lack of inhibition of antigen binding by anti-immunoglobulin sera. The ABC were not macrophages and did not bind HGG via Fc receptors because their frequency was unchanged after passage over nylon wool or incubation with antigen-antibody complexes. The temperature dependence and azide stabilization of the ABC were characteristic of antigen-binding T cells. Therefore, T cells capable of binding soluble antigen were demonstrated in Bx chicken spleen, which is free of contamination by B cells and passively adsorbed antibody.
mesh_terms: D000818:Animals; D001345:Autoradiography; D001402:B-Lymphocytes / Q000276:immunology; D002060:Bursa of Fabricius / Q000601:surgery; D002645:Chickens; D008214:Lymphocytes / Q000276:immunology; D009000:Monocytes / Q000276:immunology; D011948:Receptors, Antigen, T-Cell; D013154:Spleen / Q000276:immunology; D013696:Temperature; D005719:gamma-Globulins / Q000276:immunology
chemical_list: D011948:Receptors, Antigen, T-Cell; D005719:gamma-Globulins