PMID- 32804949 OWN - NLM STAT- MEDLINE DCOM- 20200923 LR - 20200923 IS - 1553-7404 (Electronic) IS - 1553-7390 (Print) IS - 1553-7390 (Linking) VI - 16 IP - 8 DP - 2020 Aug TI - Epistatic interactions between killer immunoglobulin-like receptors and human leukocyte antigen ligands are associated with ankylosing spondylitis. PG - e1008906 LID - 10.1371/journal.pgen.1008906 [doi] LID - e1008906 AB - The killer immunoglobulin-like receptors (KIRs), found predominantly on the surface of natural killer (NK) cells and some T-cells, are a collection of highly polymorphic activating and inhibitory receptors with variable specificity for class I human leukocyte antigen (HLA) ligands. Fifteen KIR genes are inherited in haplotypes of diverse gene content across the human population, and the repertoire of independently inherited KIR and HLA alleles is known to alter risk for immune-mediated and infectious disease by shifting the threshold of lymphocyte activation. We have conducted the largest disease-association study of KIR-HLA epistasis to date, enabled by the imputation of KIR gene and HLA allele dosages from genotype data for 12,214 healthy controls and 8,107 individuals with the HLA-B*27-associated immune-mediated arthritis, ankylosing spondylitis (AS). We identified epistatic interactions between KIR genes and their ligands (at both HLA subtype and allele resolution) that increase risk of disease, replicating analyses in a semi-independent cohort of 3,497 cases and 14,844 controls. We further confirmed that the strong AS-association with a pathogenic variant in the endoplasmic reticulum aminopeptidase gene ERAP1, known to alter the HLA-B*27 presented peptidome, is not modified by carriage of the canonical HLA-B receptor KIR3DL1/S1. Overall, our data suggests that AS risk is modified by the complement of KIRs and HLA ligands inherited, beyond the influence of HLA-B*27 alone, which collectively alter the proinflammatory capacity of KIR-expressing lymphocytes to contribute to disease immunopathogenesis. FAU - Hanson, Aimee L AU - Hanson AL AUID- ORCID: 0000-0002-0231-8771 AD - University of Queensland Diamantina Institute, University of Queensland, Brisbane, Queensland, Australia. CN - International Genetics of Ankylosing Spondylitis Consortium FAU - Vukcevic, Damjan AU - Vukcevic D AUID- ORCID: 0000-0001-7780-9586 AD - Melbourne Integrative Genomics, School of Mathematics and Statistics, University of Melbourne, Parkville, Victoria, Australia. AD - Data Science, Murdoch Children's Research Institute, Parkville, Victoria, Australia. FAU - Leslie, Stephen AU - Leslie S AUID- ORCID: 0000-0003-3511-3470 AD - Melbourne Integrative Genomics, School of Mathematics and Statistics, University of Melbourne, Parkville, Victoria, Australia. AD - Data Science, Murdoch Children's Research Institute, Parkville, Victoria, Australia. AD - School of Biosciences, University of Melbourne, Parkville, Victoria Australia. FAU - Harris, Jessica AU - Harris J AD - Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia. AD - Translational Research Institute, Princess Alexandra Hospital, Brisbane, Queensland, Australia. FAU - Le Cao, Kim-Anh AU - Le Cao KA AUID- ORCID: 0000-0003-3923-1116 AD - Melbourne Integrative Genomics, School of Mathematics and Statistics, University of Melbourne, Parkville, Victoria, Australia. FAU - Kenna, Tony J AU - Kenna TJ AUID- ORCID: 0000-0001-6844-3463 AD - Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia. AD - Translational Research Institute, Princess Alexandra Hospital, Brisbane, Queensland, Australia. FAU - Brown, Matthew A AU - Brown MA AD - Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia. AD - Translational Research Institute, Princess Alexandra Hospital, Brisbane, Queensland, Australia. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20200817 PL - United States TA - PLoS Genet JT - PLoS genetics JID - 101239074 RN - 0 (HLA Antigens) RN - 0 (Minor Histocompatibility Antigens) RN - 0 (Receptors, KIR) RN - EC 3.4.11.- (Aminopeptidases) RN - EC 3.4.11.- (ERAP1 protein, human) SB - IM MH - Alleles MH - Aminopeptidases/genetics MH - *Epistasis, Genetic MH - HLA Antigens/*genetics MH - Humans MH - Minor Histocompatibility Antigens/genetics MH - Polymorphism, Single Nucleotide MH - Receptors, KIR/*genetics MH - Spondylitis, Ankylosing/*genetics PMC - PMC7451988 COIS- The authors have declared that no competing interests exist. EDAT- 2020/08/18 06:00 MHDA- 2020/09/24 06:00 PMCR- 2020/08/17 CRDT- 2020/08/18 06:00 PHST- 2020/01/06 00:00 [received] PHST- 2020/06/03 00:00 [accepted] PHST- 2020/08/27 00:00 [revised] PHST- 2020/08/18 06:00 [pubmed] PHST- 2020/09/24 06:00 [medline] PHST- 2020/08/18 06:00 [entrez] PHST- 2020/08/17 00:00 [pmc-release] AID - PGENETICS-D-20-00016 [pii] AID - 10.1371/journal.pgen.1008906 [doi] PST - epublish SO - PLoS Genet. 2020 Aug 17;16(8):e1008906. doi: 10.1371/journal.pgen.1008906. eCollection 2020 Aug.