title: Rapid recovery of antigen-binding receptors on chicken B cells following anti-Ig serum treatment.
abstract: Rosette-forming cells (RFC) from the peripheral blood of sheep red blood cell (SRBC)-immunized chickens were characterized as B cells which manifest antigen-binding receptors but no antibody secretion. Lymphocytes were pretreated at 0 degrees C with anti-Ig serum, washed, incubated further at various temperatures and harvested for the rosette-forming cells (RFC) assay. Anti-Ig treatment blocked all RFC formation and providing that the cells were maintained at less than 10 degrees C regeneration did not occur up to 6 h. Complete recovery of RFC formation occurred within 10 min at 37 degrees C following treatment with low but not with high concentrations of anti-Ig serum. However, recovery from inhibition by high-dose anti-Ig treatment was achieved by including chicken IgG in the incubation medium. The recovery of receptors was reduced following "sandwich" treatment of lymphocytes. When cells were treated with anti-Ig antibody, washed and exposed to various drug inhibitors of "capping" the regeneration of RFC was prevented; in contrast, inhibitors of protein synthesis were ineffective. The results were interpreted in terms of dissociation of anti-Ig antibodies from the Ig receptor at an early stage of the ligand-induced receptor redistribution process.
mesh_terms: D000818:Animals; D000888:Antibodies, Anti-Idiotypic; D000937:Antigen-Antibody Reactions; D000941:Antigens; D001402:B-Lymphocytes / Q000276:immunology*; D001666:Binding Sites, Antibody; D001769:Blood; D002645:Chickens; D004734:Energy Metabolism / Q000187:drug effects; D004912:Erythrocytes / Q000276:immunology; D007104:Immune Adherence Reaction; D007700:Kinetics; D011947:Receptors, Antigen, B-Cell / Q000378:metabolism*
chemical_list: D000888:Antibodies, Anti-Idiotypic; D000941:Antigens; D011947:Receptors, Antigen, B-Cell