Abstract:Rejection remains a major threat in pediatric renal transplantation (Tx), causing graft failure and increased exposure to drugs. The new chimeric antibody, basiliximab, directed against the alpha-chain of the interleukin-2 receptor (IL-2R), has been shown to be effective in preventing rejection episodes in adult renal transplant recipients. In our single-center experience from Essen, Germany, we evaluated prospectively the efficacy and tolerability of basiliximab, in combination with cyclosporin A (CsA) and pr… Show more
“…Most patients were treated according to the local immunosuppressive protocol consisting of basilximab, cyclosporine A, and prednisone as described elsewhere (15).…”
Children with thrombophilic risk factors were identified and treated with an intensified anticoagulation regimen after renal transplantation. An increased risk for graft failure, acute rejection episodes, or impaired renal function for pediatric renal transplant recipients with hypercoagulable status was not found.
“…Most patients were treated according to the local immunosuppressive protocol consisting of basilximab, cyclosporine A, and prednisone as described elsewhere (15).…”
Children with thrombophilic risk factors were identified and treated with an intensified anticoagulation regimen after renal transplantation. An increased risk for graft failure, acute rejection episodes, or impaired renal function for pediatric renal transplant recipients with hypercoagulable status was not found.
“…The large majority of these studies investigated recipients receiving ciclosporin as the calcineurin inhibitor; relatively few studies have investigated the addition of an interleukin-2 receptor to a tacrolimus-based immunosuppressive regimen. In children, the North American Pediatric Renal Trials and Collaborative Studies (NAPRTCS) registry has reported that there is an increase in acute rejection in children who did not receive an interleukin-2 receptor antagonist [3], and a number of other reports have indicated that these agents appear to be safe and efficacious [4][5][6][7].…”
A total of 192 children and adolescents undergoing renal transplantation were randomly chosen to receive tacrolimus, azathioprine and corticosteroids (TAS, n = 93) or tacrolimus, azathioprine, corticosteroids and two doses of basiliximab (TAS + B, n = 99). Six-month outcome data have previously been reported; this manuscript reports the 2-year data. Complete 2-year data were available on 164 (85.4%) of the original 192 patients. There was a single death in the TAS arm. Kaplan-Meier estimates of survival free of graft loss at 2 years were 94.9% in the TAS + B arm and 89.6% in the TAS arm [hazard ratio (HR) 0.52; 95% confidence interval (CI) 0.17 to 1.54, P = 0.23]. Estimates of survival free from rejection at 2 years were 75.2% in the TAS + B arm and 68.7% in the TAS arm (HR 0.81; 95% CI 0.46 to 1.40, P = 0.44). The mean estimated glomerular filtration rate (GFR) at 2 years, was 65.8 ml/min per 1.73 m(2) body surface area in the TAS arm and 66.7 ml/min per 1.73 m(2) in the TAS + B arm (P = 0.78). Blood pressure and cholesterol levels were similar in the two arms, and there was no evidence of a difference in the incidence of infection or malignancy. These data provide further evidence of a lack of benefit associated with the addition of basiliximab to a TAS regimen for European paediatric renal transplant recipients at low immunological risk.
“…In pediatric renal transplantation, isolated reports have demonstrated that induction therapy with basiliximab combined with calcineurin inhibitors is safe and efficacious (10)(11)(12)(13). However, so far there have been no randomized, controlled, prospective trials in pediatric patients.…”
In a 6-month, multicenter, randomized, controlled, open-label, parallel-group trial, we investigated the efficacy and safety of adding basiliximab to a standard tacrolimus-based regimen in pediatric renal transplant recipients. Patients <18 years received tacrolimus/azathioprine/steroids (TAS, n = 93) or tacrolimus/azathioprine/steroids/basiliximab (TAS + B, n = 99). Target tacrolimus levels were 10-20 ng/mL between days 0-21 and 5-15 ng/mL thereafter. Steroid dosing was identical in both groups. Basiliximab was administered at 10 mg (patients <40 kg) or 20 mg (patients ≥40 kg) within 4 h of reperfusion; the same dose was repeated on day 4. Biopsy-proven acute rejection rates were 20.4% (TAS) and 19.2% (TAS + B); steroid-resistant acute rejection rates were 3.2% and 3.0%, respectively. Patient survival was 100%; graft survival rates were 95% in both arms. The nature and incidence of adverse events were similar in both arms except toxic nephropathy and abdominal pain, which were significantly higher in the TAS + B arm (14.1% vs. 4.3%; p = 0.03 and 11.1% vs. 2.2%; p = 0.02; respectively). Median serum creatinine concentrations at 6 months were 86 lmol/L in the TAS and 91 lmol/L in the TAS + B arm; glomerular filtration rate was 79.4 and 77.6 (mL/min/1.73 m 2 ), respectively. Adding basiliximab to a tacrolimus-based regimen is safe in pediatric patients, but does not improve clinical efficacy.
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