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  • Title: Everolimus as primary immunosuppression in kidney transplantation: experience in conversion from calcineurin inhibitors.
    Author: Sánchez-Fructuoso AI, Ruiz JC, Calvo N, Rodrigo E, Perez-Flores I, Gómez-Alamillo C, Fernández-Pérez C, Arias M, Barrientos A.
    Journal: Transplantation; 2012 Feb 27; 93(4):398-405. PubMed ID: 22245871.
    Abstract:
    BACKGROUND: We analyzed our clinical experience with everolimus (EVL) and identified prognostic factors for a successful conversion. METHODS: Retrospective study of 220 kidney recipients consecutively converted to EVL with calcineurin inhibitor elimination. We studied risk factors for proteinuria at 1 year after conversion, decline in renal function, and graft survival. RESULTS: Baseline creatinine clearance was 52.4±17.8 mL/min vs. 53.4±20.1 mL/min 1 year after conversion (P=0.150). Median proteinuria increased from 304 mg/day (interquartile range 160-507) to 458 mg/day (interquartile range 238-892; P<0.001). Risk factors for development of proteinuria ≥900 mg/day (P75) at 1-year postconversion were creatinine clearance less than 60 mL/min (odds ratio [OR] 3.37; 95% confidence interval [CI]: 1.15-9.89), serum triglycerides ≥150 mg/day (OR 4.35; 95% CI: 1.70-11.17), no treatment with prednisone (OR 3.04; 95% CI: 1.22-7.59), baseline proteinuria ≥550 mg/day (OR 10.37; 95% CI: 3.99-26.99), and conversion ≥3 years after transplant (OR 5.77; 95% CI: 1.89-17.59). An interaction was observed between baseline proteinuria and time to conversion: in patients with baseline proteinuria ≥550 mg/day, the risk of developing proteinuria ≥900 mg/day was 77.1% if they were converted after ≥3 years posttransplant. However, this risk was 29.8% in the subgroup converted before (P=0.02). Actuarial graft survival at 1 and 4 years postconversion was 98.2% and 86.5%, respectively. Baseline proteinuria ≥550 mg/day was a risk factor for graft loss in patients converted after the third year but not in patients converted before this time. EVL discontinuation rate was 24% in the first year postconversion. CONCLUSIONS: Conversion to EVL and elimination of calcineurin inhibitors is safe. Success depends on not making late conversions and not converting patients with high baseline proteinuria.
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