Delayed-type hypersensitivity (DTH) to phosphorylcholine (PC) could be elicited by mixtures of monoclonal anti-idiotypic antibodies. Using this system in DTH transfers, the question was asked of whether anti-idiotypic antibodies could elicit antigen induced DTH in H-2-incompatible mice. Transfer of PC-activated BALB/c lymph node cells into BALB.K mice and subsequent elicitation with anti-idiotypic antibodies resulted in a positive DTH response. In contrast, elicitation with the antigen PC showed the expected H-2 restriction.

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