Abstract
Side effects of calcineurin inhibitors (CNIs) include nephrotoxicity and hypertension. Moreover, children have a higher risk of infections and posttransplantation lymphoproliferative disorders. We retrospectively evaluated the efficacy and safety of Sirolimus (SRL) in 18 patients, who were 10.52 ± 5.03 years at time of transplantation and received a CNI as the core immunosuppression. The most common indications for starting SRL therapy were chronic allograft nephropathy, Epstein-Barr virus–associated neoplasia, and thrombotic microangiopathy. The patients were converted to SRL at 49.14 ± 45.9 months posttransplantation. Mean follow-up after the switch to SRL was 13.83 ± 7.24 months. All patients who began SRL therapy remained on that medication. We observed a significant improvement (P < .05) in glomerular filtration rate assessed using the Schwartz formula at 3 months, which was sustained thereafter. There were no changes in proteinuria, plasma lipids, and platelet number. Although the prevalence of hypertensive patients decreased during follow-up, it was not significant. There was one steroid-sensitive, acute rejection episode. Serious adverse events included 1 death due to a relapse of B lymphoma, 1 sepsis, and 1 pancreatic pseudo-cyst. Adverse events were present in 17% of patients: 3 Herpes Simplex infections, and 1 dose-related lymphedema. Further studies are necessary to assess the impact of adverse events in the pediatric transplant population receiving SRL as immunosuppression.
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