alexa Differential immunogenicity of HLA mismatches: HLA-A2 versus HLA-A28.
Clinical Research

Clinical Research

Journal of Clinical and Experimental Transplantation

Author(s): Dankers MK, Roelen DL, Van Der MeerPrins EM, De Lange P, Korfage N,

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Abstract The immunogenicity of human leukocyte antigen (HLA)-A2 versus HLA-A28 was analyzed by antibody production, cytotoxic T-lymphocyte (CTL) induction, and graft survival. We observed that an HLA-A2 mismatched child in HLA-A28 women leads to HLA-A2 specific antibodies in 32\% of the women (n=31), whereas in the case of an HLA-A28 child and HLA-A2 women (n=30), no HLA-A28 specific antibodies were found ( P<0.002). Also, the CTL precursor frequencies were significantly lower against HLA-A28 compared with CTLp frequencies against HLA-A2 ( P=0.012). Finally, the kidney graft survival was slightly better in HLA-A2 positive recipients transplanted with HLA-A28 mismatches. We can conclude that single HLA-A28 mismatches are less immunogenic in HLA-A2 individuals compared with single HLA-A2 mismatches in HLA-A28 individuals, which is probably because the mismatched epitopes on the HLA-A2 molecule are unique epitopes, whereas the mismatched epitopes on HLA-A28 are shared by other HLA-A and HLA-B molecules. This article was published in Transplantation and referenced in Journal of Clinical and Experimental Transplantation

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