[The evidence of POZ on the xenogenic transplantation of skin (author's transl)].

Phenoloxidase containing cells (POZ) identified with histochemical techniques in the subcutaneous connective tissue showed a marked increase in their number in response to heteroplastic skin transplantation in the rat. The number of these cells reached a peak of the 6th day of transplantation. From this time on their number gradually decreased on the 14th as well. POZ never invaded the graft, they remained confined to the host's tissue. A similar proliferation of POZ was never observed in the vicinity of skin autografts. The possible role in immune reactions of these cells is discussed.