title: Soluble factors in tolerance and contact sensitivity to 2,4-dinitrofluorobenzene in mice. IV. Characterization of migration inhibition factor-producing lymphocytes and genetic requirements for activation.
abstract: The production of migration inhibition factor (MIF) in vitro by lymph node cells from mice with contact sensitivity to 2,4-dinitrofluorobenzene (DNFB) was investigated. MIF activity of cell-free culture supernatants was measured using a micro, indirect "hanging-drop" assay system. We found that DNFB-sensitized lymph node cells are stimulated to produce MIF by co-culture with DNP-labeled spleen cells or splenic adherent cells. The stimulation was quantitatively antigen-specific, as co-culture with TNP-spleen cells or TNP-splenic adherent cells induced only low levels of MIF activity. Pretreating the immune lymph node cells with different antisera plus complement, before addition of DNP-spleen cells, showed that MIF production is dependent on Ia- T cells. Additional experiments showed that in order for the T cells to be stimulated, homology at the I-A subregion of the major histocompatibility complex between the T cells and DNP-spleen cells is required. Collectively, these results correlate with our previous finding that transfer of contact sensitivity is mediated by Ia- T cells and indicate that both tests, i.e., transfer in vivo and MIF production in vitro, are measuring effector functions of the same T cell subset.
mesh_terms: D000818:Animals; D003877:Dermatitis, Contact / Q000276:immunology*; D004139:Dinitrofluorobenzene / Q000276:immunology*; D006168:Guinea Pigs; D000949:Histocompatibility Antigens Class II / Q000235:genetics; D007106:Immune Sera / Q000494:pharmacology; D007108:Immune Tolerance; D008198:Lymph Nodes / Q000166:cytology / Q000276:immunology; D008213:Lymphocyte Activation; D008263:Macrophage Migration-Inhibitory Factors / Q000096:biosynthesis*; D051379:Mice; D008805:Mice, Inbred A; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D009578:Nitrobenzenes / Q000276:immunology*; D013045:Species Specificity; D013601:T-Lymphocytes / Q000145:classification / Q000276:immunology
chemical_list: D000949:Histocompatibility Antigens Class II; D007106:Immune Sera; D008263:Macrophage Migration-Inhibitory Factors; D009578:Nitrobenzenes; D004139:Dinitrofluorobenzene