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  • Title: Late conversion to mammalian target of rapamycin inhibitor/proliferation signal inhibitors in kidney transplant patients: clinical experience in the last 5 years.
    Author: Sola E, Lopez V, Gutierrez C, Cabello M, Burgos D, Molina MG, Hernandez D.
    Journal: Transplant Proc; 2010 Oct; 42(8):2859-60. PubMed ID: 20970551.
    Abstract:
    INTRODUCTION: Treatment with proliferation signal inhibitors (PSIs; sirolimus/everolimus) is a therapeutic option for renal transplant recipients, especially those who develop chronic graft nephropathy (CGN) or a neoplasm. We sought to analyze the efficacy and safety of conversion to PSIs. MATERIAL AND METHODS: We undertook a retrospective study of 77 patients converted between January 2005 and October 2009 to PSIs: 53 sirolimus and 24 everolimus. The causes for conversion were 63% tumors, 30% for chronic graft nephropathy (CGN), and 7% for other reasons. Mean time from transplant to conversion was 8 years. Patients were followed for a mean of 18 months (range, 1-61). RESULTS: A significant 14% improvement in renal function was observed at 1 year after conversion: baseline Modification of Diet in Renal Disease (MDRD) 45±20 versus 51±20.1 mL/min/1.73 m2 (P=.03). The benefit was greater among patients converted for CGN: baseline MDRD 31.5±8.8 versus 40.9±13.1 mL/min/1.73 m2 (P=.02), a 30% increase. The side effects experienced by 40% of patients included: 12% diarrhea, 15% edema, 20% buccal aphthae, 10% pneumonitis, and 20% skin alterations. PSIs were withdrawn in 25% of patients: 13% for side effects, 2.5% for patient death, and 3.8% for graft loss. We observed increases in serum lipids and proteinuria with a mild decrease in hemoglobin. CONCLUSION: Conversion to PSIs is a safe, useful therapeutic option for carefully selected patients, when renal function has not undergone marked deterioration and there is no proteinuria. Although side effects are common, most are mild; withdrawal of PSIs was necessary in a relatively low percentage of cases.
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