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  • Title: Conversion to rapamycin immunosuppression for malignancy after kidney transplantation: case reports.
    Author: Iaria G, Anselmo A, De Luca L, Manuelli M, Lucchesi C, Tariciotti L, Monaco A, Sforza D, Nigro F, Abruzzese E, Tisone G.
    Journal: Transplant Proc; 2007; 39(6):2036-7. PubMed ID: 17692685.
    Abstract:
    INTRODUCTION: Malignancies are a well-known complication of immunosuppressive therapy among renal transplant recipients, representing an important cause of long-term morbidity and mortality. Rapamycin has been shown to limit the proliferation of a number of malignant cell lines in vivo and in vitro. METHODS: Eight patients developed the following malignancies after kidney transplantation (mean 102.6 months; range 12 to 252): metastatic gastric cancer (n = 1), metastatic colon cancer (n = 1), bilateral nephrourothelioma (n = 1), skin cancer (n = 1), Kaposi's sarcoma (n = 2), posttransplant lymphoproliferative disorder (PTLD) (n = 2). After the diagnosis of malignancy, the patients were switched from calcineurin inhibitor-based immunosuppression to rapamycin (monotherapy, n = 2), associated with steroids (n = 4) or mycophenolate mofetil (n = 2). RESULTS: Both patients with metastatic cancer underwent chemotherapy and then succummbed after 6 and 13 months. After a mean follow-up of 20.3 months (range 2 to 47), the remaining six patients are free from cancer disease. Renal graft function was unchanged from diagnosis throughout the follow-up. CONCLUSION: Our observations suggested that rapamycin-based immunosuppression offered the possibility of regression of nonmetastatic tumors. Nevertheless, it is difficult to assess whether tumor regression was attributed to Rapamycin treatment or to the reduced immunosuppression.
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