title: T-T interactions in the induction of suppressor and helper T cells: analysis of membrane phenotype of precursor and amplifier cells.
abstract: The Ly and Ia phenotypes of T lymphocytes involved in the in vitro generation of helper and suppressor cells were identified. The precursors of both cells are found in adult thymectomized spleen. Helper precursors are Ly-1+2-3-Ia-, while suppressor precursors are Ly-1-2+3+Ia-, although the suppressor effector is Ia+. In both cases a second 'amplifier' cell is required for differentiation of precursors to occur. This cell is found in anti-lymphocyte serum-treated spleen and has the phenotype Ly-1+2+3+Ia-.
mesh_terms: D000818:Animals; D000961:Antilymphocyte Serum; D002454:Cell Differentiation; D002462:Cell Membrane / Q000276:immunology; D000939:Epitopes; D007075:Immunoglobulin M / Q000096:biosynthesis; D007165:Immunosuppression Therapy; D007519:Isoantigens / Q000032:analysis*; D051379:Mice; D010641:Phenotype; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology*
chemical_list: D000961:Antilymphocyte Serum; D000939:Epitopes; D007075:Immunoglobulin M; D007519:Isoantigens