Abstract
An important contribution of HLA-A antigen matching in renal transplantation was reported initially, hut later publications showed a minor or absent role. We analyzed the contribution of HLA-A locus matching to graft survival in 17,672 first renal transplants from unrelated, nonliving donors. We show that an independent HLA-A matching effect still exists. Due to its relative weakness and late appearance, large numbers and longer follow-up periods are required. The HLA-A matching effect is a significant factor in first renal allograft survival up to 6 years after transplantation, with an increasing effect over time. This is in contrast to the strong, short-lived, effects of HLA-DR and -B matching, which can only be detected up to 6 months and 2 years after transplantation, respectively. A clear additive beneficial effect of HLA-A matching is shown in the group without B and DR mismatches. Therefore, prospective matching for the HLA-A antigens remains important for renal allograft survival.
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