Immunoprophylaxis with a monoclonal anti-IL-2 receptor antibody in liver transplant patients
Abstract
The immunosuppressive effect of a monoclonal antibody (moAb), BT563, directed to the alpha-chain of the IL-2R (CD25), was analyzed in a prospective nonrandomized trial and a prospective randomized trial. Primary objectives were evaluation of the incidence of acute rejections and infections; secondary objectives were safety and tolerability of the moAb. A total of 28 patients were enrolled (phase II) to receive 10 mg/day of BT563 (12 days) as immunoprophylaxis in combination with cyclosporine, azathioprine, and low-dose steroids. Subsequently 32 patients were randomly assigned (phase III) to receive BT563 (10 mg/day) for 12 days or ATG (5 mg/kg/day) for 7 days in addition to cyclosporine and low-dose steroids. No side effects of the BT563 treatment were noted. The actuarial survival was 82% at 12 months in the phase II trial and 92% at 12 months in both arms of the phase III trial. There was one acute rejection in the phase II trial. No acute rejections were noted in the BT arm of the phase III trial and 5 acute rejections were treated in the ATG arm. In the phase II trial 7 infectious episodes were observed, while one infection was seen in the BT arm and 7 in the ATG arm of the triple immunosuppression phase III trial. In all p...Continue Reading
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