Steroid withdrawal in pediatric and adult renal transplant recipients

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Abstract
Corticosteroids are still a cornerstone in the immunosuppressive regimen in pediatric renal transplant recipients despite their numerous side effects, such as inhibition of longitudinal growth, body disfigurement, arterial hypertension, cardiovascular complications, osteopathy, and others. Previous attempts to spare steroids in cyclosporine (CsA)-based protocols have been associated with an increased risk for acute rejection episodes. The recent introduction of more-potent immunosuppressive medications, such as mycophenolate mofetil (MMF), have, however, renewed interest in steroid-sparing protocols to avoid or ameliorate steroid-associated side effects. Recent studies in Caucasian adult renal transplant recipients receiving CsA and MMF have shown a beneficial effect of late (≥6 months post transplant) steroid withdrawal on steroid-associated side effects without the burden of an increased rate of acute rejection episodes. These favorable results compared with previous reports in patients on CsA and azathioprine (AZA) can be ascribed to the higher immunosuppressive potency of MMF compared with AZA. We have shown in a retrospective case control study in 40 pediatric renal transplant recipients that late steroid withdrawal is safe and successful in stable patients under an immunosuppressive maintenance therapy with CsA and MMF. The Mid-European Study Group on Pediatric Renal Transplantation and the Arbeitsgemeinschaft für Pädiatrische Nephrologie are currently performing a prospective randomized trial to validate these observations.

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