title: Macrophage-lymphocyte interaction. III. Site of alloantiserum inhibition of T lymphocyte proliferation induced by allogeneic or aldehyde-bearing cells.
abstract: Inhibition by anti-Ia sera of guinea pig T lymphocyte proliferation induced by allogeneic macrophages (MLR) and NaIO4 or neuraminidase-galactose oxidase-treated macrophages has been investigated in order to identify the target cell upon which the antisera act. Anti-2 and anti-13 alloantisera were found to inhibit both MLR and aldehydeinduced T cell reactivity when directed against the specificity of the stimulatory macrophage. Little or no inhibition was observed when these antisera were directed against the T lymphocyte specificity when cultures were harvested at the time of peak proliferation. In addition, anti-2 serum was found to inhibit macrophage-lymphocyte rosett formation at 20 hr between neuraminidase-galactose oxidase-treated strain 2 macrophages and strain 13 lymphocytes. These findings demonstrate that inhibition of T cell proliferation can be produced by anti-Ia sera directed against the macrophage and raise the possibility that Ir gene products may function in part at the level of the macrophage.
mesh_terms: D000818:Animals; D000961:Antilymphocyte Serum / Q000494:pharmacology*; D001667:Binding, Competitive; D000939:Epitopes; D007111:Immunity, Cellular; D008213:Lymphocyte Activation; D007959:Lymphocyte Culture Test, Mixed; D008264:Macrophages / Q000276:immunology*; D051379:Mice; D009439:Neuraminidase / Q000378:metabolism; D010504:Periodic Acid / Q000378:metabolism; D013601:T-Lymphocytes / Q000378:metabolism*; D013997:Time Factors
chemical_list: D000961:Antilymphocyte Serum; D000939:Epitopes; D010504:Periodic Acid; D009439:Neuraminidase