Abstract
BALB/c mice develop cytotoxic lymphocytes as well as produce specific antibodies against the minor histocompatibility antigens when injected with DBA/2 P815 cells. P815 cells grown in BALB/c mice have IgG antibodies on their surface as demonstrated by the binding of 125I-labeled goat anti-mouse IgG and by complement-dependent cytotoxicity. Serum from BALB/c mice hyperimmunized with P815 cells blocked lymphocyte-mediated cytotoxicity by BALB/c immune peritoneal exudate cells. This blocking activity was removed by absorbing hyperimmune serum with DBA/2 spleen cells or P815 cells. This result suggests that specific antibodies were generated against the minor histocompatibility differences between BALB/c and DBA/2 mice. The experimental procedures described may be very useful in demonstrating minute quantities of antibody against minor histocompatibility antigens on tumor cells.
Published Version
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