Induction of H-2-specific antibodies by injections of syngeneic Sendai virus-coated cells.
The capacity of the B cell immunoglobulin receptor to recognize complexes of Sendai viral and H-2b antigens was investigated by studying the antibody response to injections of syngeneic Sendai virus-coated (SV+) spleen cells in C57BL/6 (B6) mice. Almost all mice produced alloreactive anti-H2 lymphocytotoxic antibodies. In contrast, such antibodies were found very exceptionally in mice injected with normal (SV-) cells or with Sendai virus (SV) only. The reaction pattern of the cytotoxic antibodies induced was variable and ranged from almost anti-private to widely cross-reactive serotypes. The results of reactions on H-2-congenic, -recombinant and -mutant mouse strains, and of capping and immunoprecipitation experiments showed that the cytotoxic antibodies were directed against H-2 class I molecules. The anti-H-2 antibodies exhibited enhanced binding for SV+ target cells, but absorption experiments showed that this was not the result of cross-reactions with cell surface Sendai viral determinants or with a molecular complex of H-2 plus SV. This conclusion was supported by the observation that syngeneic SV+ cells were not the predominant targets for the induced lymphocytotoxic antibodies. Our results do not support the existence of MHC-restricted antiviral antibodies, but show the induction of anti-class I H-2 alloantibodies by injections with syngeneic SV-coated cells. We present a model for regular induction of anti-H-2 antibodies without intentional alloimmunization.
D000818:Animals; D000914:Antibodies, Viral / Q000096:biosynthesis* / Q000276:immunology; D000918:Antibody Specificity; D000956:Antigens, Viral / Q000276:immunology; D003429:Cross Reactions; D003601:Cytotoxicity Tests, Immunologic; D006183:H-2 Antigens / Q000276:immunology*; D007114:Immunization; D007518:Isoantibodies / Q000096:biosynthesis* / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology; D051379:Mice; D008810:Mice, Inbred C57BL / Q000276:immunology; D010222:Parainfluenza Virus 1, Human / Q000276:immunology*; D013154:Spleen / Q000637:transplantation
D000914:Antibodies, Viral; D000956:Antigens, Viral; D006183:H-2 Antigens; D007518:Isoantibodies