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Dorando HK, Mutic EC, Li JY, Perrin EP, Wurtz MK, Quinn CC, Payton JE. LPS and type I and II interferons have opposing effects on epigenetic regulation of LAIR1 expression in mouse and human macrophages. J Leukoc Biol 2024; 115:547-564. [PMID: 38011310 DOI: 10.1093/jleuko/qiad148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/26/2023] [Accepted: 11/09/2023] [Indexed: 11/29/2023] Open
Abstract
Inhibitory immune receptors are important for maintaining immune homeostasis. We identified epigenetic alterations in 2 members of this group, LAIR1 and LAIR2, in lymphoma patients with inflammatory tissue damage and susceptibility to infection. We predicted that the expression of LAIR genes is controlled by immune mediators acting on transcriptional regulatory elements. Using flow cytometry, quantitative reverse-transcription polymerase chain reaction, and RNA sequencing, we measured LAIR1 and LAIR2 in human and murine immune cell subsets at baseline and posttreatment with immune mediators, including type I and II interferons, tumor necrosis factor α, and lipopolysaccharide (LPS). We identified candidate regulatory elements using epigenome profiling and measured their regulatory activity using luciferase reporters. LAIR1 expression substantially increases during monocyte differentiation to macrophages in both species. In contrast, murine and human macrophages exhibited opposite changes in LAIR1 in response to immune stimuli: human LAIR1 increased with LPS while mouse LAIR1 increased with interferon γ. LAIR genes had distinct patterns of enhancer activity with variable responses to immune stimuli. To identify relevant transcription factors (TFs), we developed integrative bioinformatic techniques applied to TF chromatin immunoprecipitation sequencing, RNA sequencing, and luciferase activity, revealing distinct sets of TFs for each LAIR gene. Most strikingly, LAIR1 TFs include nuclear factor kappa B factors RELA and RELB, while Lair1 and LAIR2 instead include STAT3 and/or STAT5. Regulation by nuclear factor kappa B factors may therefore explain the LPS-induced increase in LAIR1 expression, in contrast to Lair1 decrease. Our findings reveal new insights into transcriptional mechanisms that control distinct expression patterns of LAIR genes in response to inflammatory stimuli in human and murine myeloid and lymphoid cells.
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Affiliation(s)
- Hannah K Dorando
- Department of Pathology and Immunology, Washington University School of Medicine in St.Louis, 660 S. Euclid Avenue, Box 8118, St. Louis, MO 63110, United States
| | - Evan C Mutic
- Department of Pathology and Immunology, Washington University School of Medicine in St.Louis, 660 S. Euclid Avenue, Box 8118, St. Louis, MO 63110, United States
| | - Joanna Y Li
- Department of Pathology and Immunology, Washington University School of Medicine in St.Louis, 660 S. Euclid Avenue, Box 8118, St. Louis, MO 63110, United States
| | - Ezri P Perrin
- Department of Pathology and Immunology, Washington University School of Medicine in St.Louis, 660 S. Euclid Avenue, Box 8118, St. Louis, MO 63110, United States
| | - Mellisa K Wurtz
- Department of Pathology and Immunology, Washington University School of Medicine in St.Louis, 660 S. Euclid Avenue, Box 8118, St. Louis, MO 63110, United States
| | - Chaz C Quinn
- Department of Pathology and Immunology, Washington University School of Medicine in St.Louis, 660 S. Euclid Avenue, Box 8118, St. Louis, MO 63110, United States
| | - Jacqueline E Payton
- Department of Pathology and Immunology, Washington University School of Medicine in St.Louis, 660 S. Euclid Avenue, Box 8118, St. Louis, MO 63110, United States
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Abstract
The leukocyte-associated immunoglobulin-like receptor 1 (LAIR-1) is an inhibitory receptor expressed on the majority of peripheral blood mononuclear cells and is important for the regulation of immune responses. The binding of LAIR-1 to its ligands results in the loss of immune function in the tumor microenvironment (TME) and a reduction in T cell function and immune responses of antigen-presenting cells. Using bioinformatics analysis, we showed that LAIR-1 is broadly upregulated in multiple types of cancer. By designing a LAIR-2-Fc recombinant protein to block the binding of LAIR-1 to its ligand collagen, we observed augmented cytotoxic T cell infiltration and function resulting in antitumor immune responses that eliminated cancer cells. Besides, LAIR-2-Fc fusion protein potentiated the antitumor effect of PD-1/L1 checkpoint blockade therapy. Collectively, our results support the targeting of LAIR-1 for potential immunotherapeutic applications.
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Affiliation(s)
- Lijun Xu
- College of Medical, Henan University of Science and Technology, Luoyang, Henan, China
| | - Shanlong Wang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan, China
| | - Jufeng Li
- Department of Clinical Laboratory, The Second Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan, China
| | - Jie Li
- Department of Clinical Laboratory, The Second Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan, China
| | - Bingyu Li
- College of Medical, Henan University of Science and Technology, Luoyang, Henan, China
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Olde Nordkamp MJM, van Eijk M, Urbanus RT, Bont L, Haagsman HP, Meyaard L. Leukocyte-associated Ig-like receptor-1 is a novel inhibitory receptor for surfactant protein D. J Leukoc Biol 2014; 96:105-11. [PMID: 24585933 DOI: 10.1189/jlb.3ab0213-092rr] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The collagenous C-type lectin, SP-D, is a multitrimeric glycoprotein present at mucosal surfaces and is involved in host defense against infections in mammals. SP-D has immunomodulatory properties, but the underlying mechanisms are incompletely understood. SP-D contains collagen domains. LAIR-1 is an inhibitory immune receptor at the cell surface of various immune-competent cells that binds collagen. We hypothesized that the immunomodulatory functions of SP-D can be mediated via interactions between its collagen domain and LAIR-1. Binding assays show that SP-D interacts via its collagenous domain with LAIR-1 and the related LAIR-2. This does not affect the mannan-binding capacities of SP-D, which induces cross-linking of LAIR-1 in a cellular reporter assay. Functional assays show that SP-D inhibits the production of FcαR-mediated reactive oxygen via LAIR-1. Our studies indicate that SP-D is a functional ligand of the immune inhibitory receptor LAIR-1. Thus, we have identified a novel pathway for the immunomodulatory functions of SP-D mediated via binding of its collagenous domains to LAIR-1. This may provide a mechanism for the unexplained immunomodulatory function of the collagenous domains of SP-D.
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Affiliation(s)
| | - Martin van Eijk
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, the Netherlands; and
| | - Rolf T Urbanus
- Department of Clinical Chemistry and Hematology, University Medical Centre Utrecht, the Netherlands
| | - Louis Bont
- Laboratory of Translational Immunology, Department of Immunology, and Department of Pediatrics, Wilhelmina Children's Hospital, Utrecht, the Netherlands
| | - Henk P Haagsman
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, the Netherlands; and
| | - Linde Meyaard
- Laboratory of Translational Immunology, Department of Immunology, and
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