title: Generation of human plaque-forming cells in culture: tissue distribution, antigenic and cellular requirements.
abstract: A system for the induction of specific, hemolytic plaque-forming cells from normal human lymphocytes in vitro (HcPFC) has been established and cells from various normal lymphoid tissues have been investigated. Normal values for anti-SRBC HcPFC responses in cultures of 107 Ficoll-Hypaque separated lymphocytes range from 2000 (bone marrow) to 7000 (spleen) and 15,000 (tonsillar and peripheral blood lymphocytes). HcPFC responses to ovalbumin were lower by factor of 2 to 4. Anti-SRBC as well as anti-ovalbumin responses required the cooperation of T lymphocytes and IgM-bearing B lymphocytes and the magnitude of the response was antigen dose dependent. Addition of adherent cells as well as of 2-mercaptoethanol enhanced the response. On the basis of the data obtained in experiments examining the role of B and T lymphocytes, a tentative model of cellular interaction has been postulated, suggesting a major role for antigen concentration in the modulation of the response via reactive T lymphocytes.
mesh_terms: D000888:Antibodies, Anti-Idiotypic; D000917:Antibody Formation / Q000187:drug effects; D001402:B-Lymphocytes / Q000276:immunology*; D001853:Bone Marrow / Q000276:immunology; D001854:Bone Marrow Cells; D002478:Cells, Cultured; D004306:Dose-Response Relationship, Immunologic; D004912:Erythrocytes / Q000276:immunology; D006462:Hemolytic Plaque Technique; D006801:Humans; D007148:Immunoglobulin mu-Chains; D008264:Macrophages / Q000276:immunology; D008623:Mercaptoethanol / Q000494:pharmacology; D010047:Ovalbumin / Q000276:immunology; D014066:Palatine Tonsil / Q000276:immunology; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000888:Antibodies, Anti-Idiotypic; D007148:Immunoglobulin mu-Chains; D008623:Mercaptoethanol; D010047:Ovalbumin