title: T cell-dependent mediator and B-cell clones.
abstract: Supernatants were collected from keyhole limpet haemocyanin (KLH) primed spleen cells which had been incubated in tissue culture medium with their priming antigen KLH. These non-specific factor (NSF) containing supernatants were then tested in a microculture system for their ability to facilitate an anti-SRBC response of nu/nu or AT times BM spleen cells. It was concluded that:(a) NSF was able to engage a large number of the available pool of sheep erythrocyte (SRBC) specific B cells into an antibody response (b) this response was characterized by the development of clones expressing plaque-forming cells (PFC), the number of PFC produced within a clone being dependent upon the amount of NSF available in that culture; (c) NSF probably acted directly on B cells, and not via other accessory cell types.
mesh_terms: D000276:Adjuvants, Immunologic / Q000494:pharmacology; D000818:Animals; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D001402:B-Lymphocytes / Q000187:drug effects / Q000276:immunology*; D002999:Clone Cells; D003470:Culture Media; D004912:Erythrocytes / Q000276:immunology; D006433:Hemocyanins / Q000276:immunology; D006462:Hemolytic Plaque Technique; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D012756:Sheep / Q000276:immunology; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000276:Adjuvants, Immunologic; D003470:Culture Media; D006433:Hemocyanins