Abstract
A simple technique for grafting a mouse heart heterotopically to rat neck vessels in experimental xenotransplantation is described. In this series, graft survival was tested with the following modes of immunomodulation: ciclosporin (Cy), athymic and nude rats, splenectomy, total lymphoid irradiation (TLI), 15-deoxyspergualin in two different doses and various combinations of these. The mean graft survival time, with Cy or athymic and nude rats as recipients, was 3 days as also seen in animals without treatment. With either irradiation, splenectomy or 15-deoxyspergualin, 10 mg/kg daily, the graft survival time was prolonged to 7.8, 4.7 and 6.8 days, respectively. In combination, TLI + splenectomy gave a graft survival of 9.7 days and Cy + splenectomy 7.2 days. With 15-deoxyspergualin at 10 mg/kg/day plus splenectomy, done 1 week prior to transplantation, graft survival was extended to 17.8 days.
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