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Article Abstract
HLA-DP permissive mismatches can be assigned a direction according to their immunopeptidome divergence across core and noncore subsets. Noncore permissive graft-versus-host mismatches show significantly reduced risks of relapse without increased nonrelapse mortality compared with allele-matched pairs.
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| http://dx.doi.org/10.1182/blood.2024024351 | DOI Listing |
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From clones to immunopeptidomes: New developments in the characterization of permissive HLA-DP mismatches in hematopoietic cell transplantation.
Best Pract Res Clin Haematol
September 2024
Institute for Experimental Cellular Therapy, University Hospital Essen, Germany. Electronic address:
Mismatching at the HLA-DPB1 locus occurs frequently in hematopoietic cell transplantation with unrelated donors. Despite this, HLA-DPB1 allelic mismatches have traditionally not been considered in patient-donor matching. A T-cell epitope (TCE) model for the functional assessment of permissive mismatches at this locus has nevertheless been adopted in clinical practice.
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October 2024
Institute for Experimental Cellular Therapy, University Hospital Essen, Essen, Germany.
HLA-DP permissive mismatches can be assigned a direction according to their immunopeptidome divergence across core and noncore subsets. Noncore permissive graft-versus-host mismatches show significantly reduced risks of relapse without increased nonrelapse mortality compared with allele-matched pairs.
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Blood Adv
October 2024
Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA.
In 10/10 HLA-matched unrelated donor (MUD) hematopoietic cell transplantation (HCT) with calcineurin-inhibitor (CNI)-based prophylaxis, T-cell epitope DP-matched and permissive mismatched donors are associated with similar overall survival (OS) whereas donors with nonpermissive mismatches should be avoided. Younger unrelated donors are also favored over older donors. We explored outcomes associated with different combinations of DP-matching and donor age (dichotomized at 35 years) to further guide donor selection.
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HLA
June 2024
Department of HLA Laboratory, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, National Clinical Research Center for Hematologic Diseases (NCRCH), Collaborative Innovation Center of Hematology, Soochow University, Suzhou, Jiangsu, China.
To analyse the effect of HLA-DPA1 and HLA-DPB1 allelic mismatches on the outcomes of unrelated donor haematopoietic stem cell transplantation (URD-HSCT), we collected 258 recipients with haematological disease who underwent HLA-10/10 matched URD-HSCT. HLA-A, -B, -C, -DRB1, -DQB1, -DRB3/4/5, -DQA1, -DPA1 and -DPB1 typing was performed for the donors and recipients using next-generation sequencing (NGS) technology. After excluding 8 cases with DQA1 or DRB3/4/5 mismatches, we included 250 cases with HLA-14/14 matching for further analysis.
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June 2024
The Blood and Marrow Transplant Program, Northside Hospital Cancer Institute, Atlanta, Georgia.
The presence of an HLA-DPB1 nonpermissive mismatch (NPMM) by the TCE-3 model has been associated with improved survival following haploidentical donor transplantation (HIDT) using post-transplantation cyclophosphamide (PTCy). With the development of a revised model (TCE-Core) that further separates TCE-3 "group 3" alleles into "core" (C) and "noncore" (NC) alleles, a formerly permissive mismatch (PMM) resulting from group 3 alleles in both donor and recipient is now considered a C-NPMM if 1 or more of those alleles is NC. We aimed to study the additional effect of HLA-DPB1 C-NPMM according to the TCE-Core algorithm, as well as the directional vector of the mismatch, on outcomes following HIDT.
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