Abstract
Antibody-mediated rejection (AMR) is one of the leading causes of allograft failure especially in patients undergoing ABO-incompatible (ABOi) renal transplantation. We hypothesized that complement inhibition with eculizumab, a C5 inhibitor, would protect against AMR and maintain graft function in ABOi renal transplant recipients. Four patients undergoing living donor kidney transplant from ABOi donors were treated with a 9-week eculizumab course without therapeutic plasma exchange, intravenous immunoglobulin, or splenectomy. All patients had successful transplants and have normal graft function at the time of last follow-up. There were no cases of AMR or acute cellular rejection. Of note, 2 patients were transplanted despite persistent ABO antibody titers of 1:32, conventionally considered a contraindication to proceed in standard protocols. Eculizumab is a promising option to prevent AMR with ABOi renal transplantation without the need for splenectomy, post-transplant therapeutic plasma exchange, and intravenous immunoglobulin. Future multicenter studies are needed to determine long-term efficacy and safety.
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