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  • Title: Increased early rejection rate after conversion from tacrolimus in kidney and pancreas transplantation.
    Author: Barone GW, Ketel BL, Abul-Ezz SR, Lightfoot ML.
    Journal: JOP; 2002 Mar; 3(2):49-53. PubMed ID: 11884766.
    Abstract:
    CONTEXT: A successful immunosuppression regimen for combined kidney and pancreas transplants is tacrolimus, mycophenolate mofetil, and prednisone. However, not all patients tolerate these immunosuppressants especially tacrolimus. OBJECTIVE: To evaluate the efficacy of cyclosporine as a rescue agent for tacrolimus toxicity in combined kidney and pancreas transplants. DESIGN: Retrospective. SETTING: Single center. PATIENTS: Thirty-five combined kidney and pancreas transplants were performed between July 1994 and January 1999. All patients were insulin dependent diabetics with end-stage renal disease. Twenty-eight (mean age: 36 years and 57% female) were available with at least 12 month follow-up. INTERVENTIONS: Conversion to cyclosporine following renal (biopsy proven) or pancreatic dysfunction. MAIN OUTCOME MEASURES: Toxicity, rejection rate, and patient/transplant organ survival. RESULTS: Nineteen transplant recipients (68%) were continuously maintained on tacrolimus while nine (32%) required conversion to cyclosporine 75 +/- 20 days post-transplant. Reasons for conversion included: hyperglycemia (n=2), hemolytic-uremic syndrome (n=1), and severe tacrolimus nephrotoxicity (n=6). By 12 months post-transplant, the 19 patients maintained on tacrolimus had 5 rejections (26%). Three of the 9 patients (33%) converted to cyclosporine had an acute rejection prior to conversion. Seven of these 9 patients (78%; P=0.017 vs. patients maintained on tacrolimus) had rejections an average of 25 +/- 4 days post-conversion. Four of the 7 patients had no previous rejections prior to conversion. In spite of increased rejections, the 1- and 2-year patient/graft survivals were unchanged by converting. CONCLUSIONS: Converting to cyclosporine from tacrolimus was associated with an increased risk of acute rejection especially within the first 30 days post conversion.
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