Heterologous antilymphocyte globulin.

Abstract
THE immunosuppressive properties of heterologous antilymphocyte serum and its globulin derivative have been well known since 1961, when it was reported that a variety of immunologic responses could be weakened in guinea pigs by the administration of the antilymphocyte serum or its globulin derivative that had been raised in rabbits.1 These included the marked suppression of delayed cutaneous hypersensitivity, a lesser effect on humoral-antibody formation and a relatively feeble mitigation of skin homograft rejection. Soon afterward, it was unequivocally demonstrated2 3 4 5 that rabbit antilymphocyte serum had remarkable ability to prolong the viability of mouse or rat skin grafts even when they . . .