Influence of mepacrine on the reaction of adoptive cutaneous anaphylaxis.

In a test of adoptive cutaneous anaphylaxis, the influence of the phospholipase A2 inhibitor mepacrine, on the intensity of the local anaphylactic reaction was investigated in the skin of recipients following intracutaneous injection of syngenic immune splenocytes. Injection of the mepacrine solution with preincubated sensibilized splenocytes inhibits the cutaneous anaphylactic reaction after a single intravenous administration of allergen to recipients. The inoculation of immune splenocytes, preincubated in mepacrine but without the phospholipase A2 inhibitor, to the skin of syngeneic recipients is accompanied by less suppression of the local skin anaphylactic reaction than with a common injection of mepacrine with immune splenocytes.