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  • Title: Mycophenolate mofetil decreases rejection in simultaneous pancreas-kidney transplantation when combined with tacrolimus or cyclosporine.
    Author: Stegall MD, Simon M, Wachs ME, Chan L, Nolan C, Kam I.
    Journal: Transplantation; 1997 Dec 27; 64(12):1695-700. PubMed ID: 9422404.
    Abstract:
    BACKGROUND: Historically, the acute rejection rates in simultaneous pancreas-kidney (SPK) recipients have been extremely high (50-80%), with many second and third rejection episodes despite the use of quadruple immunosuppression (antibody induction and cyclosporine [CsA]-azathioprine [AZA]-based maintenance immunosuppression). Although this acute rejection has rarely led to graft loss, it has been a great cause of morbidity and of significantly increased cost. In an attempt to decrease the acute rejection rate and related morbidity in SPK transplant recipients, we compared two "state-of-the-art" immunosuppression regimens in a prospective, randomized, single-center study. METHODS: Patients who received SPK transplants were randomized to receive either tacrolimus (TAC) and mycophenolate mofetil (MMF, n=18) or CsA (Neoral formulation) and MMF (n=18). All patients received OKT3 induction and prednisone, which was tapered to 5 mg/day by 6 months after transplantation. All rejection episodes were biopsy proven. In addition, metabolic control (HgbA1C, hypertension, serum cholesterol), drug toxicity, and infection also were measured. Data were compared with that of a historical group (n=18) who received conventional CsA (Sandimmune formulation) and AZA-based immunosuppression. RESULTS: The incidence of biopsy-proven acute rejection was 11% in both the TAC-MMF and CsA-MMF groups with only two patients in each group experiencing a rejection episode. This rejection rate was significantly decreased from that of the CsA-AZA historical group (77%, P<0.01). There were no significant differences in infection rates, including cytomegalovirus, or in metabolic control (HgbA1C, hypertension, and cholesterol levels). All patients remained on their initial immunosuppression regimen for the first 3 months after transplantation. Between 3 and 6 months after transplantation, three patients were switched from TAC to CsA for recurrent migraine headaches, posttransplant diabetes, and chronic cytomegalovirus infection. Two patients in the CsA-MMF group died of nonimmunologic causes (aspiration pneumonia and arrhythmia) between 3 and 6 months after transplantation. CONCLUSIONS: The data from this study show that MMF treatment significantly decreases the incidence of biopsy-proven acute rejection in SPK transplant recipients compared with AZA-treated historical controls. In addition, we conclude that TAC and CsA (Neoral), when combined with MMF, yield similar, low acute rejection rates with similar graft function and metabolic control.
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