title: Macrophage-chemotactic factor-producing T cell hybridomas reactive to phosphorylcholine in I-E-restricted manner.
abstract: Macrophage-chemotactic factor (MChF)-producing T cell hybridomas were established. These hybridomas produced MChF upon the specific antigenic stimulation with phosphorylcholine (PC)-conjugated protein in the presence of I-Ed-positive antigen-presenting cells. The hybridomas also secreted MChF after co-culture with concanavalin A in the absence of antigen-presenting cells. The MChF-secreting hybridomas were positive for Kd, Dd, Lyt-1.2 but negative for I-Ad, Lyt-2.2. The molecular weight of MChF produced by the hybridomas was 43000 and the factor was focused at pH 6.6-6.8 in the chromatofocusing procedure. The MChF was protease sensitive but resistant to neuraminidase treatment, and it was stable by heating at 80 degrees C for 15 min. The MChF-producing hybridomas established in this stud did not produce macrophage migration inhibitory factor (MIF), macrophage-activating factor (MAF) or interleukin 2, suggesting molecular nonidentity between MChF and these lymphokines. The MChF-producing T cell hybridomas reactive to specific antigens (PC) will be promising tools for analysis of molecular nature of MChF as well as molecular aspects of antigen recognition mechanism of T cells.
mesh_terms: D000818:Animals; D002630:Chemotactic Factors / Q000276:immunology*; D002794:Choline / Q000031:analogs & derivatives*; D000939:Epitopes; D006825:Hybridomas / Q000276:immunology; D007525:Isoelectric Focusing; D008264:Macrophages; D051379:Mice; D008807:Mice, Inbred BALB C; D008970:Molecular Weight; D010641:Phenotype; D010767:Phosphorylcholine / Q000494:pharmacology*; D011947:Receptors, Antigen, B-Cell / Q000235:genetics; D013601:T-Lymphocytes / Q000187:drug effects / Q000276:immunology*
chemical_list: D002630:Chemotactic Factors; D000939:Epitopes; D011947:Receptors, Antigen, B-Cell; D010767:Phosphorylcholine; D002794:Choline