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Roy P, Suthahar SSA, Makings J, Ley K. Identification of apolipoprotein B-reactive CDR3 motifs allows tracking of atherosclerosis-related memory CD4 +T cells in multiple donors. Front Immunol 2024; 15:1302031. [PMID: 38571941 PMCID: PMC10988780 DOI: 10.3389/fimmu.2024.1302031] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 02/02/2024] [Indexed: 04/05/2024] Open
Abstract
Introduction Atherosclerosis is a major pathological condition that underlies many cardiovascular diseases (CVDs). Its etiology involves breach of tolerance to self, leading to clonal expansion of autoreactive apolipoprotein B (APOB)-reactive CD4+T cells that correlates with clinical CVD. The T-cell receptor (TCR) sequences that mediate activation of APOB-specific CD4+T cells are unknown. Methods In a previous study, we had profiled the hypervariable complementarity determining region 3 (CDR3) of CD4+T cells that respond to six immunodominant APOB epitopes in most donors. Here, we comprehensively analyze this dataset of 149,065 APOB-reactive and 199,211 non-reactive control CDR3s from six human leukocyte antigen-typed donors. Results We identified 672 highly expanded (frequency threshold > 1.39E-03) clones that were significantly enriched in the APOB-reactive group as compared to the controls (log10 odds ratio ≥1, Fisher's test p < 0.01). Analysis of 114,755 naïve, 91,001 central memory (TCM) and 29,839 effector memory (TEM) CDR3 sequences from the same donors revealed that APOB+ clones can be traced to the complex repertoire of unenriched blood T cells. The fraction of APOB+ clones that overlapped with memory CDR3s ranged from 2.2% to 46% (average 16.4%). This was significantly higher than their overlap with the naïve pool, which ranged from 0.7% to 2% (average 1.36%). CDR3 motif analysis with the machine learning-based in-silico tool, GLIPHs (grouping of lymphocyte interactions by paratope hotspots), identified 532 APOB+ motifs. Analysis of naïve and memory CDR3 sequences with GLIPH revealed that ~40% (209 of 532) of these APOB+ motifs were enriched in the memory pool. Network analysis with Cytoscape revealed extensive sharing of the memory-affiliated APOB+ motifs across multiple donors. We identified six motifs that were present in TCM and TEM CDR3 sequences from >80% of the donors and were highly enriched in the APOB-reactive TCR repertoire. Discussion The identified APOB-reactive expanded CD4+T cell clones and conserved motifs can be used to annotate and track human atherosclerosis-related autoreactive CD4+T cells and measure their clonal expansion.
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Affiliation(s)
- Payel Roy
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA, United States
- Immunology Center of Georgia, Augusta University, Augusta, GA, United States
| | | | - Jeffrey Makings
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA, United States
| | - Klaus Ley
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA, United States
- Immunology Center of Georgia, Augusta University, Augusta, GA, United States
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Freuchet A, Roy P, Armstrong SS, Oliaeimotlagh M, Kumar S, Orecchioni M, Ali AJ, Khan A, Makings J, Lyu Q, Winkels H, Wang E, Durant C, Ghosheh Y, Gulati R, Nettersheim F, Ley K. Identification of human exT reg cells as CD16 +CD56 + cytotoxic CD4 + T cells. Nat Immunol 2023; 24:1748-1761. [PMID: 37563308 PMCID: PMC11022744 DOI: 10.1038/s41590-023-01589-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 07/13/2023] [Indexed: 08/12/2023]
Abstract
In atherosclerosis, some regulatory T (Treg) cells become exTreg cells. We crossed inducible Treg and exTreg cell lineage-tracker mice (FoxP3eGFP-Cre-ERT2ROSA26CAG-fl-stop-fl-tdTomato) to atherosclerosis-prone Apoe-/- mice, sorted Treg cells and exTreg cells and determined their transcriptomes by bulk RNA sequencing (RNA-seq). Genes that were differentially expressed between mouse Treg cells and exTreg cells and filtered for their presence in a human single-cell RNA-sequencing (scRNA-seq) panel identified exTreg cell signature genes as CST7, NKG7, GZMA, PRF1, TBX21 and CCL4. Projecting these genes onto the human scRNA-seq with CITE-seq data identified human exTreg cells as CD3+CD4+CD16+CD56+, which was validated by flow cytometry. Bulk RNA-seq of sorted human exTreg cells identified them as inflammatory and cytotoxic CD4+T cells that were significantly distinct from both natural killer and Treg cells. DNA sequencing for T cell receptor-β showed clonal expansion of Treg cell CDR3 sequences in exTreg cells. Cytotoxicity was functionally demonstrated in cell killing and CD107a degranulation assays, which identifies human exTreg cells as cytotoxic CD4+T cells.
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Affiliation(s)
| | - Payel Roy
- La Jolla Institute for Immunology, La Jolla, CA, USA
| | | | | | - Sunil Kumar
- Immunology Center of Georgia, Augusta University, Augusta, GA, USA
| | - Marco Orecchioni
- La Jolla Institute for Immunology, La Jolla, CA, USA
- Immunology Center of Georgia, Augusta University, Augusta, GA, USA
| | - Amal J Ali
- La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Amir Khan
- Immunology Center of Georgia, Augusta University, Augusta, GA, USA
| | | | - Qingkang Lyu
- Immunology Center of Georgia, Augusta University, Augusta, GA, USA
| | - Holger Winkels
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Clinic III for Internal Medicine, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Erpei Wang
- La Jolla Institute for Immunology, La Jolla, CA, USA
| | | | - Yanal Ghosheh
- La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Rishab Gulati
- La Jolla Institute for Immunology, La Jolla, CA, USA
| | | | - Klaus Ley
- La Jolla Institute for Immunology, La Jolla, CA, USA.
- Immunology Center of Georgia, Augusta University, Augusta, GA, USA.
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Orecchioni M, Wolf D, Suryawanshi V, Winkels H, Kobiyama K, Makings J, Kiosses WB, Ley K. Deleting interleukin-10 from myeloid cells exacerbates atherosclerosis in Apoe -/- mice. Cell Mol Life Sci 2022; 80:10. [PMID: 36496494 PMCID: PMC10141524 DOI: 10.1007/s00018-022-04649-9] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 11/05/2022] [Accepted: 11/23/2022] [Indexed: 12/13/2022]
Abstract
Atherosclerosis is initiated by subendothelial retention of lipoproteins and cholesterol, which triggers a non-resolving inflammatory process that over time leads to plaque progression in the artery wall. Myeloid cells and in particular macrophages are the primary drivers of the inflammatory response and plaque formation. Several immune cells including macrophages, T cells and B cells secrete the anti-inflammatory cytokine IL-10, known to be essential for the atherosclerosis protection. The cellular source of IL-10 in natural atherosclerosis progression is unknown. This study aimed to determine the main IL10-producing cell type in atherosclerosis. To do so, we crossed VertX mice, in which IRES-green fluorescent protein (eGFP) was placed downstream of exon 5 of the Il10 gene, with atherosclerosis-prone Apoe-/- mice. We found that myeloid cells express high levels of IL-10 in VertX Apoe-/- mice in both chow and western-diet fed mice. By single cell RNA sequencing and flow cytometry analysis, we identified resident and inflammatory macrophages in atherosclerotic plaques as the main IL-10 producers. To address whether IL-10 secreted by myeloid cells is essential for the protection, we utilized LyzMCre+Il10fl/fl mice crossed into the Apoe-/- background and confirmed that macrophages were unable to secrete IL-10. Chow and western diet-fed LyzMCre+Il10fl/fl Apoe-/- mice developed significantly larger atherosclerotic plaques as measured by en face morphometry than LyzMCre-Il10 fl/flApoe-/-. Flow cytometry and cytokine measurements suggest that the depletion of IL-10 in myeloid cells increases Th17 cells with elevated CCL2, and TNFα in blood plasma. We conclude that macrophage-derived IL-10 is critical for limiting atherosclerosis in mice.
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Affiliation(s)
- Marco Orecchioni
- La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA.
| | - Dennis Wolf
- Cardiology and Angiology I, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Vasantika Suryawanshi
- La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA
| | - Holger Winkels
- Department of Cardiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Kouji Kobiyama
- Division of Vaccine Science, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Jeffrey Makings
- La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA
| | - William B Kiosses
- Histology and Microscopy Core Facility, La Jolla Institute for Immunology, La Jolla, CA, 92037, USA
| | - Klaus Ley
- La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA. .,Department of Bioengineering, University of California San Diego, La Jolla, CA, 92093, USA. .,Immunology Center of Georgia (IMMCG), Augusta University, Augusta, GA, 30912, USA.
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Roy P, Sidney J, Lindestam Arlehamn CS, Phillips E, Mallal S, Suthahar SSA, Billitti M, Rubiro P, Marrama D, Drago F, Vallejo J, Suryawanshi V, Orecchioni M, Makings J, Kim PJ, McNamara CA, Peters B, Sette A, Ley K. Immunodominant MHC-II (Major Histocompatibility Complex II) Restricted Epitopes in Human Apolipoprotein B. Circ Res 2022; 131:258-276. [PMID: 35766025 PMCID: PMC9536649 DOI: 10.1161/circresaha.122.321116] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND CD (cluster of differentiation) 4+ T-cell responses to APOB (apolipoprotein B) are well characterized in atherosclerotic mice and detectable in humans. CD4+ T cells recognize antigenic peptides displayed on highly polymorphic HLA (human leukocyte antigen)-II. Immunogenicity of individual APOB peptides is largely unknown in humans. Only 1 HLA-II-restricted epitope was validated using the DRB1*07:01-APOB3036-3050 tetramer. We hypothesized that human APOB may contain discrete immunodominant CD4+ T-cell epitopes that trigger atherosclerosis-related autoimmune responses in donors with diverse HLA alleles. METHODS We selected 20 APOB-derived peptides (APOB20) from an in silico screen and experimentally validated binding to the most commonly occurring human HLA-II alleles. We optimized a restimulation-based workflow to evaluate antigenicity of multiple candidate peptides in HLA-typed donors. This included activation-induced marker assay, intracellular cytokine staining, IFNγ (interferon gamma) enzyme-linked immunospot and cytometric bead array. High-throughput sequencing revealed TCR (T-cell receptor) clonalities of APOB-reactive CD4+ T cells. RESULTS Using stringent positive, negative, and crossover stimulation controls, we confirmed specificity of expansion-based protocols to detect CD4+ T cytokine responses to the APOB20 pool. Ex vivo assessment of AIM+CD4+ T cells revealed a statistically significant autoimmune response to APOB20 but not to a ubiquitously expressed negative control protein, actin. Resolution of CD4+ T responses to the level of individual peptides using IFNγ enzyme-linked immunospot led to the discovery of 6 immunodominant epitopes (APOB6) that triggered robust CD4+ T activation in most donors. APOB6-specific responding CD4+ T cells were enriched in unique expanded TCR clonotypes and preferentially expressed memory markers. Cytometric bead array analysis detected APOB6-induced secretion of both proinflammatory and regulatory cytokines. In clinical samples from patients with angiographically verified coronary artery disease, APOB6 stimulation induced higher activation and memory phenotypes and augmented secretion of proinflammatory cytokines TNF (tumor necrosis factor) and IFNγ, compared with patients with low coronary artery disease. CONCLUSIONS Using 3 cohorts, each with ≈20 donors, we discovered and validated 6 immunodominant, HLA-II-restricted APOB epitopes. The immune response to these APOB epitopes correlated with coronary artery disease severity.
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Affiliation(s)
- Payel Roy
- Center for Autoimmune Disease, Laboratory of Inflammation Biology, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA
| | - John Sidney
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA 92037, USA
| | - Cecilia S. Lindestam Arlehamn
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA 92037, USA
| | - Elizabeth Phillips
- Vanderbilt University Medical Center, Nashville, TN 37235, USA
- Institute for Immunology and Infectious Diseases, Murdoch University, Perth, WA 6150, Australia
| | - Simon Mallal
- Vanderbilt University Medical Center, Nashville, TN 37235, USA
- Institute for Immunology and Infectious Diseases, Murdoch University, Perth, WA 6150, Australia
| | - Sujit Silas Armstrong Suthahar
- Center for Autoimmune Disease, Laboratory of Inflammation Biology, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA
| | - Monica Billitti
- Center for Autoimmune Disease, Laboratory of Inflammation Biology, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA
| | - Paul Rubiro
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA 92037, USA
| | - Daniel Marrama
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA 92037, USA
| | - Fabrizio Drago
- Cardiovascular Research Center, Cardiovascular Division, Department of Medicine, University of Virginia, Charlottesville
| | - Jenifer Vallejo
- Center for Autoimmune Disease, Laboratory of Inflammation Biology, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA
| | - Vasantika Suryawanshi
- Center for Autoimmune Disease, Laboratory of Inflammation Biology, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA
| | - Marco Orecchioni
- Center for Autoimmune Disease, Laboratory of Inflammation Biology, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA
| | - Jeffrey Makings
- Center for Autoimmune Disease, Laboratory of Inflammation Biology, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA
| | - Paul J. Kim
- Division of Cardiovascular Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Coleen A. McNamara
- Cardiovascular Research Center, Cardiovascular Division, Department of Medicine, University of Virginia, Charlottesville
| | - Bjoern Peters
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA 92037, USA
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Alessandro Sette
- Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA 92037, USA
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Klaus Ley
- Center for Autoimmune Disease, Laboratory of Inflammation Biology, La Jolla Institute for Immunology, 9420 Athena Circle Drive, La Jolla, CA, 92037, USA
- Department of Bioengineering, University of California San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
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5
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Wen L, Marki A, Wang Z, Orecchioni M, Makings J, Billitti M, Wang E, Suthahar SSA, Kim K, Kiosses WB, Mikulski Z, Ley K. A humanized β 2 integrin knockin mouse reveals localized intra- and extravascular neutrophil integrin activation in vivo. Cell Rep 2022; 39:110876. [PMID: 35649374 PMCID: PMC10375464 DOI: 10.1016/j.celrep.2022.110876] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 03/28/2022] [Accepted: 05/04/2022] [Indexed: 11/24/2022] Open
Abstract
β2 integrins are leukocyte-specific adhesion molecules that are essential for leukocyte recruitment. The lack of tools for reporting β2 integrin activation in mice hindered the study of β2 integrin-related immune responses in vivo. Here, we generated a humanized β2 integrin knockin mouse strain by targeting the human β2 integrin coding sequence into the mouse Itgb2 locus to enable imaging of β2 integrin activation using the KIM127 (extension) and mAb24 (high-affinity) reporter antibodies. Using a CXCL1-induced acute inflammation model, we show the local dynamics of β2 integrin activation in arresting neutrophils in vivo in venules of the mouse cremaster muscle. Activated integrins are highly concentrated in a small area at the rear of arresting neutrophils in vivo. In a high-dose lipopolysaccharide model, we find that β2 integrins are activated in association with elevated neutrophil adhesion in lung and liver. Thus, these mice enable studies of β2 integrin activation in vivo.
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Affiliation(s)
- Lai Wen
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Alex Marki
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Zhihao Wang
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Marco Orecchioni
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Jeffrey Makings
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Monica Billitti
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Erpei Wang
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Sujit S A Suthahar
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Kenneth Kim
- Histopathology Core Facility, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - William B Kiosses
- Microscopy and Histology Core Facility, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Zbigniew Mikulski
- Microscopy and Histology Core Facility, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA
| | - Klaus Ley
- Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, 9420 Athena Circle, La Jolla, CA 92037, USA; Department of Bioengineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
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6
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Wen L, Marki A, Wang Z, Orecchioni M, Makings J, Kim K, Kiosses WB, Mikulski Z, Ley K. A new β
2
integrin activation reporter mouse reveals localized intra‐ and extra‐vascular neutrophil integrin activation in vivo. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r3031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lai Wen
- Center for Autoimmunity and InflammationLa Jolla Institute for ImmunologyLa JollaCA
| | - Alex Marki
- Center for Autoimmunity and InflammationLa Jolla Institute for ImmunologyLa JollaCA
| | - Zhihao Wang
- Center for Autoimmunity and InflammationLa Jolla Institute for ImmunologyLa JollaCA
| | - Marco Orecchioni
- Center for Autoimmunity and InflammationLa Jolla Institute for ImmunologyLa JollaCA
| | - Jeffrey Makings
- Center for Autoimmunity and InflammationLa Jolla Institute for ImmunologyLa JollaCA
| | - Kenneth Kim
- Histopathology Core FacilityLa Jolla Institute for ImmunologyLa JollaCA
| | - William B. Kiosses
- Microscopy and Histology Core FacilityLa Jolla Institute for ImmunologyLa JollaCA
| | - Zbigniew Mikulski
- Microscopy and Histology Core FacilityLa Jolla Institute for ImmunologyLa JollaCA
| | - Klaus Ley
- Center for Autoimmunity and InflammationLa Jolla Institute for ImmunologyLa JollaCA
- Department of BioengineeringUniversity of California, San DiegoLa JollaCA
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Wen L, Marki A, Wang Z, Orecchioni M, Makings J, Kim K, Kiosses WB, Mikulski Z, Ley K. A new β2 integrin activation reporter mouse reveals localized intra- and extra-vascular neutrophil integrin activation in vivo. The Journal of Immunology 2022. [DOI: 10.4049/jimmunol.208.supp.105.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
β2 integrins (LFA-1, Mac-1, CD11c-CD18, and CD11d-CD18) are leukocyte-specific adhesion receptors that play critical roles in leukocyte recruitment, as well as other immunological processes such as phagocytosis and immunological synapse formation. Adhesion of leukocytes to other cells such as endothelial cells are regulated by integrin affinity changes for their ligands (“activation”). Human β2 integrin activation can be detected by reporter antibodies including mAb24 and KIM127. No such activation epitopes are known in mouse β2 integrins. Because of the lack of mouse β2 integrin activation reporter antibodies, nothing is known about β2 integrin activation in vivo. Here, we generated a humanized β2 integrin knockin mouse by targeting the human β2 integrin coding sequence into the mouse Itgb2 locus. We show that this enables imaging of β2 integrin activation using the KIM127 (extension conformation) and mAb24 (high affinity) reporter antibodies. Human β2 pairs with the mouse integrin α chains, yielding normal expression of the β2 integrins LFA-1, Mac-1 and CD11c-CD18 in all major leukocyte populations. Using a CXCL1-induced acute inflammation model, we uncovered the dynamics and subcellular localization of β2 integrin activation in arresting neutrophils in vivo in venules of the mouse cremaster muscle. Activated integrins in arresting neutrophils in vivo are concentrated at the interface of neutrophils and the endothelium at the rear side of neutrophils facing against the blood flow. In a high-dose lipopolysaccharide (LPS) model, we found that β2 integrins are activated in association with elevated neutrophil adhesion in lung and liver. Thus, these mice, for the first time, enable studies into β2 integrin activation in vivo.
This work was supported by grants from the National Institutes of Health, USA (HL078784 to K.L.) and a Postdoctoral Fellowship (19POST34450228 to L.W.) from the American Heart Association, USA.
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Affiliation(s)
- Lai Wen
- 1Center for Autoimmunity and Inflammation, La Jolla Inst. for Immunology
| | - Alex Marki
- 1Center for Autoimmunity and Inflammation, La Jolla Inst. for Immunology
| | - Zhihao Wang
- 1Center for Autoimmunity and Inflammation, La Jolla Inst. for Immunology
| | - Marco Orecchioni
- 1Center for Autoimmunity and Inflammation, La Jolla Inst. for Immunology
| | - Jeffrey Makings
- 1Center for Autoimmunity and Inflammation, La Jolla Inst. for Immunology
| | - Kenneth Kim
- 2Histopathology Core Facility, La Jolla Inst. for Immunology
| | | | - Zbigniew Mikulski
- 3Microscopy and Histology Core Facility, La Jolla Inst. for Immunology
| | - Klaus Ley
- 1Center for Autoimmunity and Inflammation, La Jolla Inst. for Immunology
- 4Department of Bioengineering, La Jolla Inst. for Immunology
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8
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Orecchioni M, Wolf D, Suryawanshi V, Winkels H, Kobiyama K, Makings J, Kiosses WB, Ley K. Myeloid cell interleukin-10 is essential for atherosclerosis protection in Apoe−/− mice. The Journal of Immunology 2022. [DOI: 10.4049/jimmunol.208.supp.54.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
Atherosclerosis, the disease underlying stroke, myocardial infarction and ischemic heart failure, is initiated by the subendothelial retention of lipoproteins and cholesterol, which then triggers a non-resolving inflammatory process driving plaque progression in the artery wall. Myeloid cells and in particular macrophages are the primary driver of this process. IL10 is a prototypic anti-inflammatory cytokine made by several immune cells such as macrophages. IL10 is also essential for the protection against atherosclerosis. However, it is not known which cells are responsible for the IL10 production mediating protection from atherosclerosis. Here, we crossed the VertX mouse model, in which an IRES-enhanced green fluorescent protein (eGFP) fusion protein was placed downstream of exon 5 of the IL-10 gene, to the atherosclerosis-prone Apoe−/− background. We found that myeloid cells express high levels of IL10 GFP in VertX-Apoe−/− mice. By scRNAseq we found that macrophages especially inflammatory macrophages in plaques are the main producers of IL10 in atherosclerosis. To address whether IL10 secreted by myeloid cells is essential for the protection, we developed a LyzMCreIL-10flox/flox mouse crossed in the Apoe−/− background and confirmed that macrophages were unable to secrete IL-10. We discovered that the LyzMCreIL-10flox/floxApoe−/− mice developed significantly more atherosclerosis than LyzMCreIL-10+/+Apoe−/−, both on chow and lipid-rich diet. Flow cytometry data and cytokine measurements suggest that the depletion of IL-10 in myeloid cells increases Th17 cells with elevated IL-17a, IL-17f and CCL20 in blood plasma. These data underscore the critical roles of macrophage-derived IL-10 in limiting atherosclerosis.
Supported by grants NIH HL 115232, 145241, and HL088093.
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Affiliation(s)
| | | | | | - Holger Winkels
- 4Department of Internal Medicine III, Division of Cardiology, Heart Center, University Hospital of Cologne, Germany
| | | | | | | | - Klaus Ley
- 3La Jolla Institute for Immunology
- 6University of California San Diego
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9
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Orecchioni M, Kobiyama K, Winkels H, Ghosheh Y, McArdle S, Mikulski Z, Kiosses WB, Fan Z, Wen L, Jung Y, Roy P, Ali AJ, Miyamoto Y, Mangan M, Makings J, Wang Z, Denn A, Vallejo J, Owens M, Durant CP, Braumann S, Mader N, Li L, Matsunami H, Eckmann L, Latz E, Wang Z, Hazen SL, Ley K. Olfactory receptor 2 in vascular macrophages drives atherosclerosis by NLRP3-dependent IL-1 production. Science 2022; 375:214-221. [PMID: 35025664 PMCID: PMC9744443 DOI: 10.1126/science.abg3067] [Citation(s) in RCA: 72] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Atherosclerosis is an inflammatory disease of the artery walls and involves immune cells such as macrophages. Olfactory receptors (OLFRs) are G protein–coupled chemoreceptors that have a central role in detecting odorants and the sense of smell. We found that mouse vascular macrophages express the olfactory receptor Olfr2 and all associated trafficking and signaling molecules. Olfr2 detects the compound octanal, which activates the NLR family pyrin domain containing 3 (NLRP3) inflammasome and induces interleukin-1β secretion in human and mouse macrophages. We found that human and mouse blood plasma contains octanal, a product of lipid peroxidation, at concentrations sufficient to activate Olfr2 and the human ortholog olfactory receptor 6A2 (OR6A2). Boosting octanal levels exacerbated atherosclerosis, whereas genetic targeting of Olfr2 in mice significantly reduced atherosclerotic plaques. Our findings suggest that inhibiting OR6A2 may provide a promising strategy to prevent and treat atherosclerosis.
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Affiliation(s)
| | - Kouji Kobiyama
- La Jolla Institute for Immunology, La Jolla, CA 92037, USA.,Division of Vaccine Science, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
| | - Holger Winkels
- La Jolla Institute for Immunology, La Jolla, CA 92037, USA.,Department of Internal Medicine III, Division of Cardiology, Heart Center, University Hospital of Cologne, 50937 Cologne, Germany
| | - Yanal Ghosheh
- La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Sara McArdle
- Histology and Microscopy Core Facility, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Zbigniew Mikulski
- Histology and Microscopy Core Facility, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - William B. Kiosses
- Histology and Microscopy Core Facility, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Zhichao Fan
- La Jolla Institute for Immunology, La Jolla, CA 92037, USA.,Department of Immunology, School of Medicine, UConn Health, University of Connecticut, Farmington, CT 06030, USA
| | - Lai Wen
- La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Yunmin Jung
- La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Payel Roy
- La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Amal J. Ali
- La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Yukiko Miyamoto
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Matthew Mangan
- Institute of Innate Immunity, University Hospital Bonn, 53127 Bonn, Germany
| | | | - Zhihao Wang
- La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | - Angela Denn
- Histology and Microscopy Core Facility, La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | | | - Michaela Owens
- La Jolla Institute for Immunology, La Jolla, CA 92037, USA
| | | | - Simon Braumann
- Department of Internal Medicine III, Division of Cardiology, Heart Center, University Hospital of Cologne, 50937 Cologne, Germany
| | - Navid Mader
- Department of Cardiothoracic Surgery, Heart Center, University Hospital of Cologne, 50937 Cologne, Germany
| | - Lin Li
- Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Hiroaki Matsunami
- Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC 27708, USA
| | - Lars Eckmann
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Eicke Latz
- Institute of Innate Immunity, University Hospital Bonn, 53127 Bonn, Germany
| | - Zeneng Wang
- Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Stanley L. Hazen
- Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA.,Heart and Vascular Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Klaus Ley
- La Jolla Institute for Immunology, La Jolla, CA 92037, USA.,Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA.,Corresponding author.
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Alabaster T, Makings J. Environment. Eco-nomic upturn. Health Serv J 1996; 106:28-9. [PMID: 10162628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- T Alabaster
- School of the Environment, Sunderland University, UK
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