PMID- 36804470 OWN - NLM STAT- MEDLINE DCOM- 20230314 LR - 20230318 IS - 1521-7035 (Electronic) IS - 1521-6616 (Linking) VI - 248 DP - 2023 Mar TI - Inhibition of ERAP1 represses HLA-B27 free heavy chains expression on polarized macrophages and interrupts NK cells activation and function from ankylosing spondylitis. PG - 109268 LID - S1521-6616(23)00047-5 [pii] LID - 10.1016/j.clim.2023.109268 [doi] AB - BACKGROUND: We aimed to assess if Endoplasmic reticulum aminopeptidase 1 (ERAP1) polymorphisms might impress Human leukocyte antigen (HLA)-B27-free heavy chains (FHCs) expression on macrophages and eventually NK cell activation in Ankylosing spondylitis (AS). METHODS: Blood samples were obtained from 10 HLAB27(+) patients with protective and 10 HLAB27(+) patients with non-protective genotype. Monocytes were isolated and polarized toward M1 and M2 macrophages. ERAP1 was inhibited in macrophages, which were then co-cultured with autologous NK cells. RESULTS: Expression of HLA-B27-FHCs on M1 and M2 macrophages was reduced in patients with protective ERAP1 genotype. Co-culturing ERAP1-inhibited M1 macrophages and NK cells from patients with protective genotype resulted in downmodulation of CD69 and CD107a markers on NK cells and reduced number of IFN-gamma(+) NK cells compared to that of patients with non-protective genotypes. CONCLUSION: Inhibition of ERAP1 activity, by diminishing NK activation, may have therapeutic value in treating AS patients. CI - Copyright (c) 2023 Elsevier Inc. All rights reserved. FAU - Babaie, Farhad AU - Babaie F AD - Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute, Urmia University of Medical Sciences, Urmia, Iran; Department of Genetic and Immunology, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran. FAU - Mohammadi, Hamed AU - Mohammadi H AD - Non-Communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran; Department of Immunology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran. FAU - Salimi, Sorayya AU - Salimi S AD - Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran. FAU - Ghanavatinegad, Alireza AU - Ghanavatinegad A AD - Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. FAU - Abbasifard, Mitra AU - Abbasifard M AD - Immunology of Infectious Diseases Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran; Department of Internal Medicine, Ali-Ibn Abi-Talib Hospital, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran. FAU - Yousefi, Mehdi AU - Yousefi M AD - Department of Immunology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran. FAU - Hajaliloo, Mehrzad AU - Hajaliloo M AD - Connective Tissue Research Center, Tabriz University of Medical Science, Iran. FAU - Khalili, Younes AU - Khalili Y AD - Iranian Social Security Organization, Emam Reza Hospital, Urmia, Iran. FAU - Zamanlou, Sajjad AU - Zamanlou S AD - Iranian Social Security Organization, Emam Reza Hospital, Urmia, Iran. FAU - Safari, Roghaiyeh AU - Safari R AD - Department of Infectious Disease, Imperial College London, London, UK. FAU - Hemmatzadeh, Maryam AU - Hemmatzadeh M AD - Department of Immunology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran. FAU - Rezaiemanesh, Alireza AU - Rezaiemanesh A AD - Department of Immunology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran. FAU - Salimi, Reza AU - Salimi R AD - Research and Development (R&D) Department, RS, &RS Scientific, Belgium. FAU - Baradaran, Behzad AU - Baradaran B AD - Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Immunology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran. Electronic address: baradaranb@tbzmed.ac.ir. FAU - Babaloo, Zohreh AU - Babaloo Z AD - Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Immunology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran; Connective Tissue Research Center, Tabriz University of Medical Science, Iran. Electronic address: zbabaloo@tbzmed.ac.ir. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230216 PL - United States TA - Clin Immunol JT - Clinical immunology (Orlando, Fla.) JID - 100883537 RN - 0 (HLA-B27 Antigen) RN - 0 (Minor Histocompatibility Antigens) RN - EC 3.4.11.- (ERAP1 protein, human) RN - EC 3.4.11.- (Aminopeptidases) SB - IM MH - Humans MH - *Spondylitis, Ankylosing/genetics MH - Polymorphism, Genetic MH - Genotype MH - Macrophages MH - Killer Cells, Natural MH - HLA-B27 Antigen/genetics/metabolism MH - Minor Histocompatibility Antigens MH - Polymorphism, Single Nucleotide MH - Genetic Predisposition to Disease MH - Aminopeptidases/genetics OTO - NOTNLM OT - Ankylosing spondylitis OT - Endoplasmic reticulum aminopeptidase 1 OT - Free heavy chains OT - Human leukocyte antigen-B27 OT - Macrophage OT - Natural killer cell COIS- Declaration of Competing Interest The authors declare that they have no conflict of interest. EDAT- 2023/02/23 06:00 MHDA- 2023/03/15 06:00 CRDT- 2023/02/22 08:45 PHST- 2022/07/31 00:00 [received] PHST- 2023/01/27 00:00 [revised] PHST- 2023/01/30 00:00 [accepted] PHST- 2023/02/23 06:00 [pubmed] PHST- 2023/03/15 06:00 [medline] PHST- 2023/02/22 08:45 [entrez] AID - S1521-6616(23)00047-5 [pii] AID - 10.1016/j.clim.2023.109268 [doi] PST - ppublish SO - Clin Immunol. 2023 Mar;248:109268. doi: 10.1016/j.clim.2023.109268. Epub 2023 Feb 16.