Properties of anti-idiotypic T cell lines propagated with syngeneic B lymphocytes. I. T cells bind intact idiotypes and discriminate between the somatic idiotypic variants in a manner similar to the anti-idiotopic antibodies.
We describe the development of T cell lines possessing a binding specificity for syngeneic T15 idiotopes (Id) expressed on phosphorylcholine (PC)-reactive Ig. The lines were obtained by cultivation of BALB/c splenic T cells with T15 Id+ stimulator cells BCg3R-1d, a BALB/c lymphoma transfected with genomic sequences mu and kappa with S107 (T15) variable regions. Resulting Thyl-2+, L3T4+ cell lines depend on the T15 Id+ BCg3R-1d cells for growth and demonstrate the ability to bind TEPC15, a S107 germline-encoded, PC-specific Ig alpha. The specificity of the 125I-TEPC15 binding was studied in a competitive RIA with various unlabeled Ig. The isolated H and L chains of TEPC15 failed to inhibit the 125I-TEPC15 binding, and the T15-, PC-binding proteins M603 (alpha) and M511 (alpha) inhibited the binding either poorly or not at all. Moreover, the T cell lines had a discriminatory binding specificity for various T15+ Ig that are somatic variants of TEPC15 and that differ from each other in discrete, conformational Id (epitopes) detectable with specific monoclonal anti-Id. The T cell lines could be grouped according to their binding patterns, which were comparable to the recognition patterns of certain monoclonal anti-Id. These data suggest the existence of T cells with specificity for serologically-defined determinants of syngeneic idiotypes.
Cerny
J
J
Department of Microbiology, University of Texas Medical Branch, Galveston 77550.
Smith
J S
JS
Webb
C
C
Tucker
P W
PW
D000818:Animals; D000888:Antibodies, Anti-Idiotypic / Q000032:analysis / Q000276:immunology*; D000911:Antibodies, Monoclonal / Q000032:analysis; D000918:Antibody Specificity; D001402:B-Lymphocytes / Q000276:immunology*; D001666:Binding Sites, Antibody; D002460:Cell Line; D006822:Hybrid Cells / Q000276:immunology*; D007130:Immunoglobulin Idiotypes / Q000276:immunology*; D008213:Lymphocyte Activation; D051379:Mice; D008807:Mice, Inbred BALB C; D009194:Myeloma Proteins / Q000378:metabolism; D010767:Phosphorylcholine / Q000276:immunology / Q000378:metabolism; D051381:Rats; D011919:Rats, Inbred Strains; D013601:T-Lymphocytes / Q000276:immunology* / Q000378:metabolism
D000888:Antibodies, Anti-Idiotypic; D000911:Antibodies, Monoclonal; D007130:Immunoglobulin Idiotypes; D009194:Myeloma Proteins; C043925:myeloma protein TEPC15; D010767:Phosphorylcholine