PMID- 34143437 OWN - NLM STAT- MEDLINE DCOM- 20210914 LR - 20220208 IS - 1532-6535 (Electronic) IS - 0009-9236 (Print) IS - 0009-9236 (Linking) VI - 110 IP - 3 DP - 2021 Sep TI - Immunopharmacogenomics: Mechanisms of HLA-Associated Drug Reactions. PG - 607-615 LID - 10.1002/cpt.2343 [doi] AB - The human leukocyte antigen (HLA) system is the most polymorphic in the human genome that has been associated with protection and predisposition to a broad array of infectious, autoimmune, and malignant diseases. More recently over the last two decades, HLA class I alleles have been strongly associated with T-cell-mediated drug hypersensitivity reactions. In the case of abacavir hypersensitivity and HLA-B*57:01, the 100% negative predictive value and low number needed to test to prevent a single case has led to a durable and effective global preprescription screening strategy. However, HLA associations are still undefined for most drugs clinically associated with different delayed drug hypersensitivity phenotypes, and an HLA association relevant to one population is not generalizable across ethnicities. Furthermore, while a specific risk HLA allele is necessary for drug-induced T-cell activation, it is not sufficient. The low and incomplete positive predictive value has hindered efforts at clinical implementation for many drugs but has provided the impetus to understand the mechanisms of HLA class I restricted T-cell-mediated drug hypersensitivity reactions. Current research has focused on defining the contribution of additional elements of the adaptive immune response and other genetic and ecologic risk factors that contribute to drug hypersensitivity risk. In this review we focus on new insights into immunological, pharmacological, and genetic mechanisms underpinning HLA-associated drug reactions and the implications for future translation into clinical care. CI - (c) 2021 The Authors. Clinical Pharmacology & Therapeutics (c) 2021 American Society for Clinical Pharmacology and Therapeutics. FAU - Deshpande, Pooja AU - Deshpande P AD - Institute for Immunology and Infectious Diseases (IIID), Murdoch University, Western Australia, Australia. FAU - Hertzman, Rebecca J AU - Hertzman RJ AD - Institute for Immunology and Infectious Diseases (IIID), Murdoch University, Western Australia, Australia. FAU - Palubinsky, Amy M AU - Palubinsky AM AD - Department of Medicine, Vanderbilt University Medical Centre, Nashville, Tennessee, USA. FAU - Giles, Jason B AU - Giles JB AD - Department of Pharmacy Practice & Science, University of Arizona, Tucson, Arizona, USA. FAU - Karnes, Jason H AU - Karnes JH AD - Department of Medicine, Vanderbilt University Medical Centre, Nashville, Tennessee, USA. AD - Department of Pharmacy Practice & Science, University of Arizona, Tucson, Arizona, USA. FAU - Gibson, Andrew AU - Gibson A AD - Institute for Immunology and Infectious Diseases (IIID), Murdoch University, Western Australia, Australia. FAU - Phillips, Elizabeth J AU - Phillips EJ AD - Institute for Immunology and Infectious Diseases (IIID), Murdoch University, Western Australia, Australia. AD - Department of Medicine, Vanderbilt University Medical Centre, Nashville, Tennessee, USA. LA - eng GR - R01 AI152183/AI/NIAID NIH HHS/United States GR - U01 AI154659/AI/NIAID NIH HHS/United States GR - P50 GM115305/GM/NIGMS NIH HHS/United States GR - T32 ES007091/ES/NIEHS NIH HHS/United States GR - R01 HG010863/HG/NHGRI NIH HHS/United States GR - K01 HL143137/HL/NHLBI NIH HHS/United States GR - R21 AI139021/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20210717 PL - United States TA - Clin Pharmacol Ther JT - Clinical pharmacology and therapeutics JID - 0372741 RN - 0 (HLA Antigens) RN - 0 (HLA-B Antigens) SB - IM MH - Adaptive Immunity/genetics/immunology MH - Alleles MH - Animals MH - Drug Hypersensitivity/*genetics/immunology MH - HLA Antigens/*genetics/immunology MH - HLA-B Antigens/genetics/immunology MH - Humans MH - Lymphocyte Activation/genetics/immunology MH - Pharmacogenetics/methods MH - T-Lymphocytes/immunology PMC - PMC8500648 MID - NIHMS1744853 COIS- Conflicts of Interest. EJP is codirector of IIID Pty Ltd that holds a patent for HLA-B*57:01 testing for abacavir hypersensitivity; she holds a provisional patent for HLA-A*32:01 testing for vancomycin hypersensitivity. All other authors declared no competing interests for this work. EDAT- 2021/06/19 06:00 MHDA- 2021/09/15 06:00 PMCR- 2021/10/08 CRDT- 2021/06/18 12:31 PHST- 2021/04/09 00:00 [received] PHST- 2021/06/13 00:00 [accepted] PHST- 2021/06/19 06:00 [pubmed] PHST- 2021/09/15 06:00 [medline] PHST- 2021/06/18 12:31 [entrez] PHST- 2021/10/08 00:00 [pmc-release] AID - 10.1002/cpt.2343 [doi] PST - ppublish SO - Clin Pharmacol Ther. 2021 Sep;110(3):607-615. doi: 10.1002/cpt.2343. Epub 2021 Jul 17.