JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Differential immunogenicity of paternal HLA Class I antigens in pregnant women.

More insight into the differential immunogenicity of human leukocyte antigen (HLA) mismatches will be beneficial for donor selection in clinical transplantation. In this study the immunogenicity of HLA antigens was analyzed by examining the antibody profiles in women who have been pregnant. In total 888 women, who had pregnancy induced HLA alloantibodies, were included in this study, while 413 women who had not been immunized by their pregnancy, served as controls. First it was analyzed whether women expressing particular HLA antigens are more likely to produce HLA alloantibodies. Next we determined whether certain HLA mismatches of their children are more immunogenic than other ones. Finally we studied whether the immunogenicity of specific HLA mismatches is dependent on the HLA phenotype of the women. Women expressing HLA-A3, HLA-A32, and HLA-B21 are more likely to produce alloantibodies whereas women expressing HLA-B13 and HLA-B17 have a significantly lower incidence of alloantibodies compared with women expressing other HLA antigens. Children with HLA-A2 or HLA-B5 mismatches induced alloantibodies significantly more often whereas children with HLA-A30, -A31 or -A33 and HLA-A28 induced alloantibodies significantly less often than children with other HLA class I mismatches. Finally we could demonstrate that the immunogenicity of a particular HLA mismatch is dependent on the HLA phenotype of the women. Information on the differential immunogenicity of HLA mismatches may be of benefit for the determination of acceptable and taboo mismatches in the case of donor selection for (highly sensitized) patients.

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