Influence of non-H-2 genes on the in vivo response to penicillin-treated autologous platelets.

Mice of different inbred strains were injected intravenously on day 0 and day 6 with autologous platelets incubated in a penicillin solution. After the second injection mice of most strains died immediately with anaphylactic symptoms. Both passive transfer experiments and indirect immunofluorescence studies suggest that a serum factor (probably IgM) is involved in this phenomenon. Only mice with a C3H background were unable to respond to autologous penicillin-treated platelets, although C3H platelets did induce a lethal response in B10.A mice. Experiments in which B10.A mice were primed with autologous penicillin-treated platelets and rechallenged with allogeneic penicillin-treated platelets, showed that the response is directed against a polymorphic non-H-2 antigen in combination with penicillin.