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Hum Immunol. 1998 Oct;59(10):650-5.

Impact of the MHC-encoded HLA-DMA, DMB, and LMP2 gene polymorphisms on kidney graft outcome.

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  • 1Etablissement de Transfusion Sanguine, Nantes, France.


We previously studied the relationship between TAP1 and TAP2 gene polymorphism and compatibility in kidney graft outcome and reported that the currently described TAP1 and TAP2 gene polymorphisms did not influence the incidence of acute rejection episodes. In this study, we report on the effect of polymorphism and matching of HLA-DMA, -DMB, and LMP2 genes on kidney graft outcome. This study was performed on 102 selected kidney recipients who experienced two or more acute rejection episodes (rejection group) during follow up and who were compared to a group of 150 patients who never had rejection (non rejection group). Although a significant effect of HLA-DR matching was observed between these two groups, our data suggest that matching for all the new genes located in the HLA class II region (TAP1, TAP2, LMP2, HLA-DMA and -DMB) does not influence the kidney graft outcome. However, a significant increase (pc < 0.05) of DMA*0102 allele was observed in the recipients of the rejection group as compared to those of the non rejection group. This effect was not due to a linkage disequilibrium between DMA and HLA-DR loci and suggests that this specific HLA-DMA allele could play a role in the indirect pathway of class II presentation of donor antigens.

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