Use of heterologous antireceptor antibodies for specific reversal of acute homologous disease in mice

Abstract

Antireceptor antibodies anti- (CBA-anti-C57BL/6) and anti-(C57BL/6-anti-BALB/c) were obtained in a heterologous system by immunization of rabbits with alloimmune mouse lymphocytes and intensive absorption of immune rabbit sera. In the complement-dependent cytotoxic assay, these antireceptor antibodies were able to lyse only T-lymphoblasts with corresponding idiotypic specificity but not T-lymphoblasts of other idiotypes and normal T- and B- lymphocytes of various strains. It was also shown that antireceptor antibodies specifically inhibit the lethal graft-versus-host disease after injection of allogenic parental spleen cells into irradiated F1-recipients. These results suggest that heterologous antireceptor antibodies are capable of inhibiting specifically the immune responses to allogenic transplantation antigens.