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JOURNAL ARTICLE
RESEARCH SUPPORT, U.S. GOV'T, P.H.S.
The role of HLA-DPB1 disparity in the development of acute graft-versus-host disease following unrelated donor marrow transplantation.
Blood 1993 April 2
The role of HLA-DPB1 disparity in the development of acute graft-versus-host disease (GVHD) following unrelated donor (URD) marrow transplantation is unknown. We studied 129 patients who underwent marrow transplantation from HLA-A, -B, -DRB, and -DQB matched URDs to determine whether matching for HLA-DPB1 alleles significantly decreased the risk of developing acute GVHD. HLA-DPB1 alleles were determined by sequence-specific oligonucleotide hybridization and by the number of patient DPB1 alleles not shared by the donor scored. The Kaplan-Meier probability of developing grades II to IV acute GVHD was determined for patients incompatible for zero (group A), one (group B), or two (group C) DPB1 alleles. Of the 129 pairs, there was no recipient DPB1 incompatibility in 28 (22%), one DPB1 mismatch in 72 (56%), and two DPB1 mismatches in 29 (22%). The probability of grades II to IV acute GVHD was 0.69 (0.50, 0.86) for group A, 0.83 (0.73, 0.91) for group B, and 0.72 (0.56, 0.87) for group C (P = .63). These results indicate that matching patients and unrelated donors for HLA-A, -B, -DRB, and -DQB does not predict for matching at DPB1. However, recipient incompatibility for DPB1 alleles does not detectably influence the risk of acute GVHD. Therefore, HLA-DP disparity should not be used as an exclusion criterion for donor selection in unrelated marrow transplantation.
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