Production of anti-W24 xenoantisera in rabbits.

One out of four rabbits injected with partially purified soluble HL-A antigen from serum produced cytotoxic antibodies to human lymphocytes. These antibodies appear to be directed to the specificity W24 as determined by correlation studies with HL-A alloantisera and by absorption-inhibition experiments with human platelets and with serum soluble HL-A antigens. In the sera from the other three immunized rabbits, no antibodies to human lymphoid cells could be detected by the cytotoxic test, blocking of T cell rosette formation, stimulation of DNA synthesis and inhibition of mixed lymphocyte reaction.