Increased helper cell activity of NZB mice against H-2-identical allogeneic cells.
The T cells of NZB mice become hyperreactive after stimulation with minor histocompatibility (MIH) antigens. This hyperreactivity has previously been demonstrated only for cytotoxic T cells of NZB, although there was some evidence for an increase of their T-helper cell activity facilitating the response. Here we report a quantitative analysis of T-cell help and help of T-cell subpopulations against autologous, MIH, and H-2 antigens in a limiting dilution assay. After stimulation of NZB T cells with autologous and H-2 antigens, the T-helper cell frequencies did not differ from that of normal mice. After stimulation with MIH antigens however, Lyt 1+2+ T-cells of NZB showed a higher response than those of BALB/c origin. The same difference was seen after prestimulation with ConA or the specific antigen. This demonstrates that NZB-helper cells are more easily activated by weak antigenic differences, and it is possible that this contributes to the prevalence of autoimmune disease in this strain.
D000818:Animals; D000938:Antigen-Presenting Cells / Q000276:immunology*; D001323:Autoantibodies / Q000276:immunology; D001327:Autoimmune Diseases / Q000276:immunology*; D004195:Disease Models, Animal / Q000276:immunology; D005260:Female; D006183:H-2 Antigens / Q000276:immunology*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008814:Mice, Inbred NZB; D008815:Mice, Inbred Strains; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*
D001323:Autoantibodies; D006183:H-2 Antigens