title: Influence of Igh-C- and MHC-linked genes on the activity of immunoglobulin-recognizing T cells.
abstract: BALB/c Lyt-1+ cells that proliferate in response to NP-modified BALB/c Ig fail to respond to BALB/c Ig modified by a different hapten, TNP. By contrast, when NP-modified BALB/c Ig is used as the immunogen in C.B-20 mice, a strain congenic with BALB/c but expressing the Ighb allotype of C57BL/6 (B6), a partial cross-reaction between NP- and TNP-BALB/c Ig is observed. Similarly, strains expressing different Igh haplotypes also show distinct reactivities toward NP-B6 Ig and NP-modified myeloma proteins. Thus, the proliferative response to NP-modified Ig is regulated by Igh-linked genes. In this paper, we also characterize the T cell proliferative response to IgG2a of the b allotype. We show that allotypic determinants on this molecule are recognized in association with self MHC-encoded gene products and that responsiveness is controlled by MHC-linked Ir genes. Thus, products of MHC-linked genes also influence the activity of Ig-recognizing T cells. Taken together, experiments described in this report suggest that T cells directed against immunogenic determinants on antibody molecules are governed by the same rules as T cells that respond to conventional antigens.
mesh_terms: D000818:Animals; D000950:Antigens, Ly / Q000276:immunology; D000939:Epitopes / Q000235:genetics / Q000276:immunology; D005802:Genes, MHC Class II; D007126:Immunoglobulin Allotypes / Q000235:genetics; D007074:Immunoglobulin G / Q000276:immunology; D007143:Immunoglobulin Heavy Chains / Q000235:genetics*; D008213:Lymphocyte Activation; D051379:Mice; D008807:Mice, Inbred BALB C; D009194:Myeloma Proteins / Q000276:immunology; D009596:Nitrophenols / Q000276:immunology; D010641:Phenotype; D010648:Phenylacetates; D013601:T-Lymphocytes / Q000145:classification / Q000276:immunology*; D014302:Trinitrobenzenesulfonic Acid / Q000276:immunology
chemical_list: D000950:Antigens, Ly; D000939:Epitopes; D007126:Immunoglobulin Allotypes; D007074:Immunoglobulin G; D007143:Immunoglobulin Heavy Chains; D009194:Myeloma Proteins; D009596:Nitrophenols; D010648:Phenylacetates; C026242:4-hydroxy-5-nitrophenyl acetic acid; D014302:Trinitrobenzenesulfonic Acid