Abstract
Both pretransplant blood transfusions and pretransplant splenectomy have been shown to improve renal allograft survival in humans and experimental animals. A study was undertaken using the Lewis rat to determine if any combination of pretransplant splenectomy and pretransplant blood transfusions exerted either a synergistic or deleterious effect on renal allograft survival. Pretransplant splenectomy and pretransplant blood transfusions used singly significantly prolonged renal allograft survival. Pretransplant splenectomy followed by 3 blood transfusions also significantly prolonged renal allograft survival. This finding implies that secondary sites of suppressor cell activity, for instance lymph nodes, can be stimulated by blood transfusion and produce prolonged allograft survival in the absence of the spleen. No combination of pretransplant blood transfusion and splenectomy was synergistic. In fact, the group that had pretransplant transfusions followed by splenectomy had allograft survival no different from the control group.
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