title: Autoimmune syndrome after induction of neonatal tolerance to alloantigens: effects of in vivo treatment with anti-T cell subset monoclonal antibodies.
abstract: BALB/c (H-2d) mice rendered tolerant to h-2b alloantigens by neonatal injection of semiallogeneic (C57BL/6 X BALB/c)F1 spleen cells develop autoimmune features due to an abnormal activation of persisting F1 donor B cells. The role of T cells in this autoimmune syndrome was studied by in vivo treatment of tolerant mice with anti-L3T4(GK-1.5) or anti-Ly-2 (H-35-17.2) monoclonal antibodies. The treatment of tolerant mice from day 2 to day 21 of life with anti-L3T4 MAb completely prevented the occurrence of circulating immune complexes of anti-ssDNA anti-Sm and anti-hapten (FITC) IgG antibodies as well as the glomerular deposition of Ig that were usually seen in untreated tolerant mice. This effect persisted for at least 6 wk after stopping this treatment. When the injections of anti-L3T4 MAb were delayed until day 15 of life, a very significant decrease of the autoimmune manifestations was still observed. Treatment of tolerant mice with anti-Ly-2 MAb during the same period had no effects on the autoimmune disease as compared with untreated tolerant mice. No effects on the maintenance of tolerance vs H-2b alloantigens were observed after treatment with anti-L3T4 MAb, as followed by the decrease of CTL and CTL-p alloreactivity and by the persistence of F1 donor B cells, indicated by the presence of Ig bearing the Ighb donor allotype. These results suggest the existence of interactions between L3T4+ T cells and persisting autoreactive B cells from F1 donor origin in the development of the autoimmune syndrome after neonatal induction of transplantation tolerance.
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000276:immunology*; D000974:Antibodies, Antinuclear / Q000276:immunology; D000911:Antibodies, Monoclonal / Q000627:therapeutic use*; D000936:Antigen-Antibody Complex / Q000276:immunology; D000945:Antigens, Differentiation, T-Lymphocyte; D000950:Antigens, Ly / Q000276:immunology; D000954:Antigens, Surface / Q000276:immunology; D001323:Autoantibodies / Q000276:immunology; D001324:Autoantigens / Q000276:immunology; D001327:Autoimmune Diseases / Q000209:etiology / Q000276:immunology / Q000628:therapy*; D001402:B-Lymphocytes / Q000276:immunology / Q000637:transplantation; D006183:H-2 Antigens / Q000008:administration & dosage / Q000276:immunology*; D007108:Immune Tolerance; D007074:Immunoglobulin G / Q000276:immunology; D007678:Kidney Glomerulus / Q000032:analysis; D008211:Lymphocyte Cooperation; D008212:Lymphocyte Depletion; D051379:Mice; D008807:Mice, Inbred BALB C / Q000276:immunology; D008810:Mice, Inbred C57BL / Q000276:immunology; D017411:Ribonucleoproteins, Small Nuclear; D013154:Spleen / Q000637:transplantation; D013601:T-Lymphocytes / Q000145:classification / Q000276:immunology*; D055517:snRNP Core Proteins
chemical_list: D000974:Antibodies, Antinuclear; D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D000945:Antigens, Differentiation, T-Lymphocyte; D000950:Antigens, Ly; D000954:Antigens, Surface; D001323:Autoantibodies; D001324:Autoantigens; D006183:H-2 Antigens; D007074:Immunoglobulin G; D017411:Ribonucleoproteins, Small Nuclear; D055517:snRNP Core Proteins