PMID- 34246656 OWN - NLM STAT- MEDLINE DCOM- 20211101 LR - 20220531 IS - 1523-1755 (Electronic) IS - 0085-2538 (Linking) VI - 100 IP - 5 DP - 2021 Nov TI - Significance of HLA-DQ in kidney transplantation: time to reevaluate human leukocyte antigen-matching priorities to improve transplant outcomes? An expert review and recommendations. PG - 1012-1022 LID - S0085-2538(21)00657-8 [pii] LID - 10.1016/j.kint.2021.06.026 [doi] AB - The weight of human leukocyte antigen (HLA) matching in kidney allocation algorithms, especially in the United States, has been devalued in a stepwise manner, supported by the introduction of modern immunosuppression. The intent was further to reduce the observed ethnic/racial disparity, as data emerged associating HLA matching with decreased access to transplantation for African American patients. In recent years, it has been increasingly recognized that a leading cause of graft loss is chronic antibody-mediated rejection, attributed to the development of de novo antibodies against mismatched donor HLA expressed on the graft. These antibodies are most frequently against donor HLA-DQ molecules. Beyond their impact on graft survival, generation of de novo donor-specific HLA antibodies also leads to increased sensitization, as measured by panel-reactive antibody metrics. Consequently, access to transplantation for patients returning to the waitlist in need of a second transplant is compromised. Herein, we address the implications of reduced HLA matching policies in kidney allocation. We highlight the observed diminished outcome data, the significant financial burden, the long-term health consequences, and, more important, the unintended consequences. We further provide recommendations to examine the impact of donor-recipient HLA class II and specifically HLA-DQalpha(1)beta(1) mismatching, focusing on collection of appropriate data, application of creative simulation approaches, and reconsideration of best practices to reduce inequalities while optimizing patient outcomes. CI - Copyright (c) 2021 International Society of Nephrology. Published by Elsevier Inc. All rights reserved. FAU - Tambur, Anat R AU - Tambur AR AD - Department of Surgery, Comprehensive Transplant Center, Northwestern University, Chicago, Illinois, USA. Electronic address: a-tambur@northwestern.edu. FAU - Kosmoliaptsis, Vasilis AU - Kosmoliaptsis V AD - Department of Surgery, University of Cambridge, Cambridge, UK; National Institute of Health Research (NIHR) Blood and Transplant Research Unit in Organ Donation and Transplantation and NIHR Cambridge Biomedical Research Centre, University of Cambridge, Cambridge, UK. FAU - Claas, Frans H J AU - Claas FHJ AD - Department of Immunology, Leiden University Medical Center, Leiden, the Netherlands. FAU - Mannon, Roslyn B AU - Mannon RB AD - Department of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, USA. FAU - Nickerson, Peter AU - Nickerson P AD - Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada. FAU - Naesens, Maarten AU - Naesens M AD - Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium. LA - eng GR - PDF-2016-09-065/DH_/Department of Health/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20210708 PL - United States TA - Kidney Int JT - Kidney international JID - 0323470 RN - 0 (HLA Antigens) RN - 0 (HLA-DQ Antigens) RN - 0 (Isoantibodies) SB - IM MH - Graft Rejection/prevention & control MH - Graft Survival MH - HLA Antigens MH - HLA-DQ Antigens MH - Histocompatibility Testing MH - Humans MH - Isoantibodies MH - *Kidney Transplantation MH - Tissue Donors OTO - NOTNLM OT - HLA matching OT - HLA-DQ OT - antibody-mediated rejection OT - kidney transplantation EDAT- 2021/07/12 06:00 MHDA- 2021/11/03 06:00 CRDT- 2021/07/11 20:33 PHST- 2021/04/30 00:00 [received] PHST- 2021/06/01 00:00 [revised] PHST- 2021/06/07 00:00 [accepted] PHST- 2021/07/12 06:00 [pubmed] PHST- 2021/11/03 06:00 [medline] PHST- 2021/07/11 20:33 [entrez] AID - S0085-2538(21)00657-8 [pii] AID - 10.1016/j.kint.2021.06.026 [doi] PST - ppublish SO - Kidney Int. 2021 Nov;100(5):1012-1022. doi: 10.1016/j.kint.2021.06.026. Epub 2021 Jul 8.