July 20, 2010

Everolimus Plus Reduced-Exposure CsA versus Mycophenolic Acid Plus Standard-Exposure CsA in Renal-Transplant Recipients

Tedesco Silva H Jr, Cibrik D, Johnston T, Lackova E, Mange K, Panis C, Walker R, Wang Z, Zibari G, Kim YS.   Am J Transplant.   2010 Jun;10(6):1401-13

Everolimus is an mTOR inhibitor, in the same family as sirolimus. Previous studies combining mTOR inhibitors with usual dosing of calcineurin inhibitors showed worse renal function and graft survival, despite  equal efficacy in preventing acute rejection as a calcineurin inhibitor/mycophenolic acid combination. In this RCT, everolimus at two different target levels was combined with low-dose cyclosporine and compared to usual-dose cyclosporine and mycophenolic acid. The everolimus combinations were non-inferior to cyclosporine and MPA for the primary endpoint of eGFR at twelve months post-transplant.

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Abstract:

Everolimus allows calcineurin-inhibitor reduction without loss of efficacy and may improve renal-transplant outcomes. In a 24-month, open-label study, 833 de novo renal-transplant recipients were randomized to everolimus 1.5 or 3.0 mg/day (target troughs 3-8 and 6-12 ng/mL, respectively) with reduced-exposure CsA, or mycophenolic acid (MPA) 1.44 g/day plus standard-exposure CsA. Patients received basiliximab +/- corticosteroids. The primary endpoint was composite efficacy failure (treated biopsy-proven acute rejection, graft loss, death or loss to follow-up) and the main safety endpoint was renal function (estimated glomerular filtration rate [eGFR], by Modification of Diet in Renal Disease [MDRD]) at Month 12 (last-observation-carried-forward analyses). Month 12 efficacy failure rates were noninferior in the everolimus 1.5 mg (25.3%) and 3.0 mg (21.9%) versus MPA (24.2%) groups. Mean eGFR at Month 12 was noninferior in the everolimus groups versus the MPA group (54.6 and 51.3 vs 52.2 mL/min/1.73 m(2) in the everolimus 1.5 mg, 3.0 mg and MPA groups, respectively; 95% confidence intervals for everolimus 1.5 mg and 3.0 mg vs MPA: -1.7, 6.4 and -5.0, 3.2, respectively). The overall incidence of adverse events was comparable between groups. The use of everolimus with progressive reduction in CsA exposure, up to 60% at 1 year, resulted in similar efficacy and renal function compared with standard-exposure CsA plus MPA.

Renal Transplantation

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