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  • Title: Early conversion from cyclosporine to everolimus following living-donor kidney transplantation: outcomes at 5 years posttransplant in the randomized ZEUS trial.
    Author: Sommerer C, Budde K, Zeier M, Wüthrich RP, Reinke P, Eisenberger U, Mühlfeld A, Arns W, Stahl R, Heller K, Wolters HH, Suwelack B, Klehr HU, Hauser IA, Stangl M, Nadalin S, Dürr M, Porstner M, May C, Wimmer P, Witzke O, Lehner F.
    Journal: Clin Nephrol; 2016 Apr; 85(4):215-25. PubMed ID: 26932178.
    Abstract:
    AIMS: To assess 5-year efficacy, renal, and safety outcomes following early conversion from cyclosporine to everolimus vs. a standard cyclosporine-based regimen in living-donor kidney transplant (LDKT) recipients. MATERIALS AND METHODS: The ZEUS study was a randomized, open-label, 1-year, multicenter study in which 300 de novo kidney transplant recipients continued to receive cyclosporine or converted to everolimus at 4.5 months post-transplant, with annual follow-up visits to 5 years post-transplant. RESULTS: Of the 80 LDKT patients who were randomized, 75 completed the 1-year core study and 60 attended the 5-year follow-up visit. At year 5, 15/31 (48.4%) everolimus patients and 20/29 (69.0%) cyclosporine patients remained on the study drug. Mean adjusted estimated glomerular filtration rate (GFR) at year 5 in LDKT recipients was 67.2 vs. 60.8 mL/min/1.73m2 for everolimus vs. cyclosporine (mean difference 6.4 mL/min/1.73m2; p = 0.031). For patients who remained on study drug, the mean difference was 13.2 mL/min/1.73m2 (p = 0.003), but no significant difference was seen in patients who switched from study drug (mean -2.6 mL/min/1.73m2, p = 0.701). Patient and graft survival rates were similar with everolimus and cyclosporine. Biopsy-proven acute rejection occurred in 22.0% vs. 7.5% of LDKT patients randomized to everolimus vs. cyclosporine (p = 0.116). Only 1 LDKT patient discontinued everolimus due to adverse events during years 1 - 5. CONCLUSIONS: Early initiation of everolimus with calcineurin-inhibitor (CNI) withdrawal after LDKT improved graft function to 5 years post-transplant compared to standard CNI-based therapy. The renal benefit was concentrated in patients who remained on everolimus. An increase in mild acute rejection was not associated with long-term graft loss.
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