This study has demonstrated that the production of posttransplantation antibodies directed against donor HLA-A, -B, -Cw, -DR, and -DQ mismatches are all strongly predictive of transplant failure.

We demonstrated a significant association between diffuse C4d staining, production of DSA, and graft failure. Although the concurrent detection of DSA and C4d positivity is uncommon in our patients, these results indicate that outcome in this group is poor and they may benefit from therapies directed at the humoral response.

In recent years there have been major advances in the technology for the detection and definition of human leukocyte antigen antibodies. In this overview we describe the evolution in laboratory technology, the techniques currently available and consider their application in antibody specificity definition and in understanding a patient's sensitization profile. We discuss the importance of antibody specificity definition in facilitating efficient national organ allocation and informing clinical discussion regarding the appropriate pathway for sensitized patients awaiting renal transplantation.

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