Eight dogs with previously established kidney allografts, immunosuppressed with cyclosporin A, received islet allografts from their respective original kidney donors. The median islet-graft functional survival was only 10.5 days, significantly less than for six similarly immunosuppressed dogs receiving only islet allografts (48.5 days, P < .05). Three of the eight dogs that received sequential kidney and islet allografts had experienced no kidney-graft rejection episodes before islet transplantation, but their islet grafts were all rejected within 19 days. In the pancreatectomized dog, prior donor-specific kidney transplantation has an adverse effect on subsequent islet-graft survival.

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