title: Thymus dependence of the IgG response: role of T cells is restricted to non-specific rather than antigen-specific factors.
abstract: We have been studying the requirement for T cells in the proliferation and maturation of partially differentiated memory cells into IgG antibody secreting cells. The role of T cells in such a system can be replaced by non-antigen-specific T-cell factor(s) present in the supernatant of a 24 h mixed lymphocyte reaction (TRF) but not by antigen-specific factors released upon in vitro induction of T-helper cells with antigen. A combination of antigen-specific and non-specific factors showed no evidence of synergy between the two sets of factors and we therefore conclude that the antigen-specific factors tested play no role in the later stages of B-memory cell maturation to IgG-antibody secreting cells.
mesh_terms: D000818:Animals; D000921:Antibody-Producing Cells; D002352:Carrier Proteins; D000939:Epitopes; D006241:Haptens; D007074:Immunoglobulin G / Q000096:biosynthesis*; D007156:Immunologic Memory; D051379:Mice; D008808:Mice, Inbred CBA; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D002352:Carrier Proteins; D000939:Epitopes; D006241:Haptens; D007074:Immunoglobulin G