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  • Title: Renal, efficacy and safety outcomes following late conversion of kidney transplant patients from calcineurin inhibitor therapy to everolimus: the randomized APOLLO study.
    Author: Budde K, Rath T, Sommerer C, Haller H, Reinke P, Witzke O, Suwelack B, Baeumer D, May C, Porstner M, Arns W.
    Journal: Clin Nephrol; 2015 Jan; 83(1):11-21. PubMed ID: 25512099.
    Abstract:
    AIMS: The primary objective of this trial was to demonstrate, based on the estimated glomerular filtration rate (eGFR), superior renal function at month 12 after conversion of maintenance kidney transplant patients from calcineurin inhibitor (CNI) therapy to everolimus, compared to continuing a standard CNI regimen. MATERIALS AND METHODS: APOLLO was an open-label, 12-month, prospective, multicenter study in which 93 maintenance kidney transplant patients were randomized to convert from CNI to everolimus (n = 46) or remain on standard CNI-based immunosuppression (n = 47). The primary efficacy variable was eGFR (Nankivell formula) 12 months after randomization. The study was terminated prematurely due to slow recruitment and was thus underpowered. RESULTS: Mean time post-transplant was 83.5 months with everolimus and 70.1 months with CNI. Adjusted values for eGFR (Nankivell) at month 12 were 61.6 (95% CI 58.1, 65.1) mL/ min/1.73 m² with everolimus and 58.8 (95% CI 55.2, 62.3) mL/min/1.73 m² with CNI, a difference of 2.8 (95% CI -1.0, 6.7) mL/ min/1.73 m² (p = 0.145) i.e., the primary objective was not met. Using the modification of diet in renal disease (MDRD) formula, adjusted eGFR at month 12 was significantly higher with everolimus (p = 0.030). In the subpopulation who remained on the study drug (n = 52), the difference in the adjusted change from randomization was 6.6 (95% CI 1.5, 11.6) mL/min/1.73 m² (p = 0.013) in favor of everolimus. There was no biopsyproven acute rejection and no graft losses. Adverse events led to discontinuation of everolimus and CNI in 32.6% and 10.6% of patients, respectively. CONCLUSIONS: Conversion from CNI to everolimus to preserve renal function can be considered several years after kidney transplantation and does not compromise immunosuppressive efficacy.
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