Abstract
Background: Various desensitization strategies are used to overcome immunologic barriers such as anti-human leukocyte antigen-donor-specific antibody (HLA-DSA) and anti-ABO blood group incompatibility. Materials and Methods: Three index cases of ABO-incompatible (ABO-i) kidney transplantation from living-related donors are discussed. Each recipient was evaluated by complement-dependent cytotoxicity crossmatch, flow cytometric crossmatch, lysate-based crossmatch, and single-antigen bead Luminex assay and anti-A, B isoagglutinin titer. The desensitization protocol included 500 mg of rituximab, followed by 2–10 sessions of plasmapheresis with basiliximab/antithymocyte globulin induction. Results: Case 1: A patient received the third transplant as ABO-i transplant, with no anti-HLA-DSA. Anti-ABO antibody titers were immunoglobulin M (IgM)/IgG 1:128/1:256. He had successful desensitization to anti-AB titer of 11000) resulting in graft loss. Conclusions: Careful evaluation of immunological barriers before ABO-i transplantation should be done, especially when both anti-HLA and ABO sensitization are present.
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