title: The T cell-dependent period of the immune response to sheep erythrocytes.
abstract: To study the T cell-dependent period of the immune response of mouse spleen cells to sheep erythrocytes the co-operation between T and B cells was abrogated at different times during the in vivo or the in vitro response. The abrogation was performed by killing the T cells with anti-theta serum or anti-H-2 serum. The surviving cells were subsequently cultured in vitro and the number of IgM plaque-forming cells was determined each day. The results indicate that T cells play an important role during the first 3 days of the response in vivo. However, during the in vitro response the presence of the T cells is only required during the first 2 days. The difference between the response in vivo and in vitro is probably due to a synchronous start of the plasma cell development in vitro and a more asynchronous start of this process in vivo.
mesh_terms: D000818:Animals; D000921:Antibody-Producing Cells / Q000276:immunology; D000961:Antilymphocyte Serum; D001402:B-Lymphocytes / Q000276:immunology; D004912:Erythrocytes / Q000276:immunology; D006462:Hemolytic Plaque Technique; D007109:Immunity; D007075:Immunoglobulin M; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D008811:Mice, Inbred DBA; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D013997:Time Factors
chemical_list: D000961:Antilymphocyte Serum; D007075:Immunoglobulin M