title: Isolation of a T-cell clone that reacts with both antigen and anti-idiotype: evidence for anti-idiotype as internal image for antigen at the T-cell level.
abstract: T-cell lines were derived from ferredoxin nonresponder B10.D2 mice that share an idiotype expressed by a monoclonal antibody (Fd-B2) with specificity for one of the two major antigenic determinants (the C determinant) of the antigen. The T-cell line and T-cell clones derived from it release interleukin 2 not only in the presence of anti-Fd-B2 idiotype antibody but in the presence of ferredoxin. The line was shown to be major histocompatibility complex-restricted in that it would respond to the anti-idiotype and antigen only in the context of presentation by cells of the H-2d haplotype. This observation also establishes that the nonresponder status of H-2d animals cannot be attributed to a lesion at the level of antigen presentation. Analysis of the fine specificity of one idiotypic clone showed that it responded only to the anti-idiotype or products of the antigen containing the C determinant, since enzymatically degraded peptides devoid of this determinant did not stimulate these cells. Furthermore, it was found that presentation of both the antigen and the anti-idiotype to the specific clone could be blocked by the Fd-B2 monoclonal antibody.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D002460:Cell Line; D002478:Cells, Cultured; D002999:Clone Cells; D006183:H-2 Antigens / Q000235:genetics / Q000276:immunology*; D006239:Haplotypes; D007130:Immunoglobulin Idiotypes / Q000276:immunology*; D007376:Interleukin-2 / Q000032:analysis; D008285:Major Histocompatibility Complex; D051379:Mice; D008815:Mice, Inbred Strains; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D006183:H-2 Antigens; D007130:Immunoglobulin Idiotypes; D007376:Interleukin-2