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  • Title: Early withdrawal of cyclosporine A improves 1-year kidney graft structure and function in sirolimus-treated patients.
    Author: Stallone G, Di Paolo S, Schena A, Infante B, Grandaliano G, Battaglia M, Gesualdo L, Schena FP.
    Journal: Transplantation; 2003 Apr 15; 75(7):998-1003. PubMed ID: 12698087.
    Abstract:
    BACKGROUND: Chronic allograft nephropathy (CAN) represents the most common cause of late graft loss. Nephrotoxicity from chronic use of calcineurin inhibitors (CNI) has the potential to contribute to CAN. The present investigation aimed to evaluate the impact of early CNI withdrawal on kidney graft function and structure at 1 year in sirolimus (SRL)-treated patients. METHODS: Forty consecutive kidney transplant recipients were initially treated with corticosteroids, cyclosporine A (CsA), and SRL (2 mg/day). After 3 months, patients were randomly assigned to either continue the same treatment (group I) or to withdraw CsA and continue SRL (group II). All patients underwent kidney graft biopsy immediately after graft reperfusion (0-hr biopsy) and 12 months after engraftment. RESULTS: Baseline graft biopsy showed a higher degree of renal damage in group II patients (total score, 4+/-1.6 vs. 2+/-0.9; P<0.05). Twelve months after engraftment, CAN was diagnosed in 55% of all patients, of whom 64% were in group I and 36% in group II. CAN lesions were scored as moderate to severe in 90% of group I patients but only 32% of group II patients (P<0.05). A vascular score greater than or equal to 2 occurred in 90% of group I patients and in 38% of group II patients (P<0.05). At 1 year, group I patients showed a significantly worse kidney graft function (serum creatinine, 2.0+/-0.3 vs. 1.3+/-0.3 mg/dL; creatinine clearance, 54+/-14 vs. 66+/-17 mL/min; both P<0.002). CONCLUSIONS: These results suggest that early withdrawal of CsA is a safe option, which allows a significant reduction of chronic histologic damage, particularly vascular injury, of cadaveric kidney allografts.
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