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  • Title: Conversion from cyclosporine to sirolimus in stable renal transplant recipients.
    Author: Sennesael JJ, Bosmans JL, Bogers JP, Verbeelen D, Verpooten GA.
    Journal: Transplantation; 2005 Dec 15; 80(11):1578-85. PubMed ID: 16371929.
    Abstract:
    BACKGROUND: Conversion from cyclosporine (CsA) to sirolimus (SRL) has mainly been done in clinical conditions warranting calcineurin inhibitor discontinuation. Little is known about the clinical outcome of conversion in renal transplant recipients without transplant dysfunction. METHODS: This prospective, open-label, multicentric pilot study evaluates the safety and efficacy of converting patients with stable renal function from CsA to SRL. RESULTS: Forty stable patients on CsA, mycophenolate mofetil (MMF) (1.5 g/day), and steroids (ST) were converted at 7.6+/-1.4 months after renal transplantation. At 1 year, graft and patient survival was 100% and the incidence of acute rejection 5%. Calculated glomerular filtration rate (GFR) increased from 54+/-18 to 66+/-16 ml/min (P<0.0001). Blood pressure remained unchanged. A gradual increase in the incidence and severity of proteinuria was observed from month 6 onwards with de novo proteinuria in 30% of the patients at 1 year. Protein excretion was below 1 g/day in 12.5%, between 1 and 3 g/day in 17.5% and above 3 g/day in 7.5% of the proteinuric cohort (P=0.0043, compared to baseline). No predictors could be identified for the development of proteinuria. All patients had a reduction in protein excretion following renin-angiotensin blockade and were continued on SRL. CONCLUSION: Conversion of stable renal transplant recipients from a CsA-MMF-ST to a SRL-MMF-ST regimen is safe and results in improved renal function but is associated with the development of proteinuria in 30% of the patients requiring renin-angiotensin blockade.
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