PMID- 34030895 OWN - NLM STAT- MEDLINE DCOM- 20220104 LR - 20220104 IS - 1879-1166 (Electronic) IS - 0198-8859 (Linking) VI - 82 IP - 7 DP - 2021 Jul TI - The changing landscape of HLA typing: Understanding how and when HLA typing data can be used with confidence from bench to bedside. PG - 466-477 LID - S0198-8859(21)00115-4 [pii] LID - 10.1016/j.humimm.2021.04.011 [doi] AB - Human leukocyte antigen (HLA) genes are extraordinary for their extreme diversity and widespread impact on human health and disease. More than 30,000 HLA alleles have been officially named and more alleles continue to be discovered at a rapid pace. HLA typing systems which have been developed to detect HLA diversity have advanced rapidly and are revolutionizing our understanding of HLA's clinical importance. However, continuous improvements in knowledge and technology have created challenges for clinicians and scientists. This review explains how differences in HLA typing systems can impact the HLA types that are assigned. The consequences of differences in laboratory testing methods and reference databases are described. The challenges of using HLA types that are not equivalent are illustrated. A fundamental understanding of the continual expansion of our understanding of HLA diversity and limitations in some of the typing data is essential for using typing data appropriately in clinical and research settings. CI - Copyright (c) 2021 American Society for Histocompatibility and Immunogenetics. Published by Elsevier Inc. All rights reserved. FAU - Baxter-Lowe, Lee Ann AU - Baxter-Lowe LA AD - Department of Pathology and Laboratory Medicine, Children's Hospital Los Angeles, USA; Department of Pathology, University of Southern California, USA. Electronic address: lbaxterlowe@chla.usc.edu. LA - eng PT - Journal Article PT - Review DEP - 20210521 PL - United States TA - Hum Immunol JT - Human immunology JID - 8010936 RN - 0 (HLA Antigens) SB - IM MH - *Alleles MH - HLA Antigens/*genetics MH - *Histocompatibility Testing/methods MH - Humans MH - Translational Research, Biomedical COIS- Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2021/05/26 06:00 MHDA- 2022/01/05 06:00 CRDT- 2021/05/25 05:59 PHST- 2021/03/14 00:00 [received] PHST- 2021/04/26 00:00 [revised] PHST- 2021/04/29 00:00 [accepted] PHST- 2021/05/26 06:00 [pubmed] PHST- 2022/01/05 06:00 [medline] PHST- 2021/05/25 05:59 [entrez] AID - S0198-8859(21)00115-4 [pii] AID - 10.1016/j.humimm.2021.04.011 [doi] PST - ppublish SO - Hum Immunol. 2021 Jul;82(7):466-477. doi: 10.1016/j.humimm.2021.04.011. Epub 2021 May 21.