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  • Title: Racial differences in incident de novo donor-specific anti-HLA antibody among primary renal allograft recipients: results from a single center cohort study.
    Author: Everly MJ, Briley KP, Haisch CE, Dieplinger G, Bolin P, Kendrick SA, Morgan C, Maldonado AQ, Rebellato LM.
    Journal: Transpl Int; 2017 Jun; 30(6):566-578. PubMed ID: 28211192.
    Abstract:
    Controversy exists as to whether African American (AA) transplant recipients are at risk for developing de novo donor-specific anti-human leucocyte antigen (HLA) antibody (dnDSA). We studied 341 HLA-mismatched, primary renal allograft recipients who were consecutively transplanted between 3/1999 and 12/2010. Sera were collected sequentially pre- and post-transplant and tested for anti-HLA immunoglobulin G (IgG) via single antigen bead assay. Of the 341 transplant patients (225 AA and 116 non-AA), 107 developed dnDSA at a median of 9.2 months post-transplant. AA patients had a 5-year dnDSA incidence of 35%. This was significantly higher than the 5-year dnDSA incidence for non-AA patients (21%). DQ mismatch (risk) and receiving a living-related donor (LRD) transplant (protective) were transplant factors associated with dnDSA. Within the AA patient cohort, HLA-DQ mismatch, not-receiving a LRD transplant, nonadherence and BK viraemia were the most common factors associated with early dnDSA (occurring <24 months post-transplant). Nonadherence and pretransplant diabetes history were the strong precursors to late dnDSA. Despite the higher rates of dnDSA in the AA cohort, post-dnDSA survival was the same in AA and non-AA patients. This study suggests that DQ matching, increasing LRD transplantation in AA patients and minimizing under-immunosuppression will be key to preventing dnDSA.
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