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Delabio Auer E, Bumiller-Bini Hoch V, Borges da Silva E, Ricci Zonta Y, Alarcão Dias-Melicio L, Larocca Skare T, F Picceli V, Messias-Reason IJ, Boldt ABW. Association of neutrophil extracellular trap levels with Raynaud's phenomenon, glomerulonephritis and disease index score in SLE patients from Brazil. Immunobiology 2024; 229:152803. [PMID: 38640572 DOI: 10.1016/j.imbio.2024.152803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 02/28/2024] [Accepted: 04/04/2024] [Indexed: 04/21/2024]
Abstract
Neutrophil extracellular traps (NETs) are cell-extruded DNA strands coated with neutrophils' nuclear proteins and enzymes from cytotoxic granules, produced by NETosis, a cell death pathway. They perform an important defensive role in innate immunity, but their increased production and/or inefficient degradation expose new antigens, such as DNA or citrullinated histone peptides, triggering autoimmunity. This study aimed to access possible associations between serum NETs levels with epidemiological, clinical, and serological data from a well-characterized SLE Brazilian patients' cohort. NET levels were evaluated in one hundred seventy serum samples of patients with Systemic Lupus Erythematosus (SLE) using an Immunoassay. Univariate and multivariate binary logistic regression used clinical patients' data as independent variables. Parametric and non-parametric tests compared log10 base serum NET levels transformed between patients' groups. SLE patients were also dichotomized into "High serum NET levels" and "Low serum NET levels" groups. All analyses were performed in R language 4.1.2, and p < 0.05 were considered significant. Increased susceptibility for high serum NET levels was observed in SLE patients with Raynaud's phenomenon (OR = 2.30, 95 % CI = 1.06-5.21 and p = 0.039), independently of any other risk factor. Also, SLE patients with Raynaud's phenomenon presented higher mean NET serum levels (mean = -0.13 vs. -0.51, p = 0.01). In addition, higher mean NET serum levels were associated with glomerulonephritis (mean = -0.45 vs. -0.12, p = 0.03). Ultimately, the SLEDAI index scored higher in the high NETs serum levels group (median = 2.0 vs. 0.0, p = 6 × 10-3). The formation of NETs might be implicated in Raynaud's phenomenon, glomerulonephritis, and disease index score in SLE patients. Our results highlight the importance of serum NET levels as a possible therapeutical target to modulate the clinical course of SLE.
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Affiliation(s)
- Eduardo Delabio Auer
- Postgraduate Program in Genetics. Department of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, Paraná, Brazil
| | - Valéria Bumiller-Bini Hoch
- Postgraduate Program in Genetics. Department of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, Paraná, Brazil
| | - Emiliano Borges da Silva
- Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990 Curitiba, PR, Brazil
| | - Yohan Ricci Zonta
- São Paulo State University (UNESP), Medical School of Botucatu, Laboratory of Immunopathology and Infectious Agents - LIAI, UNIPEX - Experimental Research Unity, Sector 5, Botucatu, SP, Brazil
| | - Luciane Alarcão Dias-Melicio
- São Paulo State University (UNESP), Medical School of Botucatu, Laboratory of Immunopathology and Infectious Agents - LIAI, UNIPEX - Experimental Research Unity, Sector 5, Botucatu, SP, Brazil; São Paulo State University (UNESP), Medical School of Botucatu, Department of Pathology, Botucatu, SP, Brazil
| | | | - Vanessa F Picceli
- Hospital Geral de Curitiba - Exército Brasileiro - Curitiba, Paraná, Brazil
| | - Iara José Messias-Reason
- Laboratory of Immunopathology, Department of Clinical Pathology, Federal University of Paraná, Curitiba, Brazil
| | - Angelica Beate Winter Boldt
- Postgraduate Program in Genetics. Department of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, Paraná, Brazil.
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Kannan KP, Girija A.S. S. Exploring the ROS reduction strategies in chronic lupus management. Front Immunol 2024; 15:1346656. [PMID: 38444846 PMCID: PMC10913789 DOI: 10.3389/fimmu.2024.1346656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 01/29/2024] [Indexed: 03/07/2024] Open
Affiliation(s)
| | - Smiline Girija A.S.
- Department of Microbiology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, Tamilnadu, India
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Zhang M, Li X, Zhang Q, Yang J, Liu G. Roles of macrophages on ulcerative colitis and colitis-associated colorectal cancer. Front Immunol 2023; 14:1103617. [PMID: 37006260 PMCID: PMC10062481 DOI: 10.3389/fimmu.2023.1103617] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 03/06/2023] [Indexed: 03/18/2023] Open
Abstract
Colitis-associated colorectal cancer is the most serious complication of ulcerative colitis. Long-term chronic inflammation increases the incidence of CAC in UC patients. Compared with sporadic colorectal cancer, CAC means multiple lesions, worse pathological type and worse prognosis. Macrophage is a kind of innate immune cell, which play an important role both in inflammatory response and tumor immunity. Macrophages are polarized into two phenotypes under different conditions: M1 and M2. In UC, enhanced macrophage infiltration produces a large number of inflammatory cytokines, which promote tumorigenesis of UC. M1 polarization has an anti-tumor effect after CAC formation, whereas M2 polarization promotes tumor growth. M2 polarization plays a tumor-promoting role. Some drugs have been shown to that prevent and treat CAC effectively by targeting macrophages.
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Xie T, Dong J, Zhou X, Tang D, Li D, Chen J, Chen Y, Xu H, Xue W, Liu D, Hong X, Tang F, Yin L, Dai Y. Proteomics analysis of lysine crotonylation and 2-hydroxyisobutyrylation reveals significant features of systemic lupus erythematosus. Clin Rheumatol 2022; 41:3851-3858. [PMID: 35941338 PMCID: PMC9652266 DOI: 10.1007/s10067-022-06254-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 05/14/2022] [Accepted: 06/15/2022] [Indexed: 11/28/2022]
Abstract
INTRODUCTION/OBJECTIVES To seek significant features of systemic lupus erythematosus (SLE) by utilizing bioinformatics analysis. METHOD Liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used to quantify lysine crotonylation (Kcr) and lysine 2-hydroxyisobutyrylation (Khib) in peripheral blood mononuclear cells (PBMCs) of systemic lupus erythematosus (SLE) patients and normal controls. RESULTS Seventy-six differentially modified proteins (DMPs) dually modified by Kcr and Khib were identified between SLE patients and healthy people. GO enrichment analysis prompted significant enrichment of seventy-six DMPs in MHC class II protein complex binding and leukocyte migration. KEGG pathways were enriched in antigen processing and presentation pathway and leukocyte transendothelial migration pathway. Six DMPs (CLTC, HSPA1B, HSPA8, HSP90AB1, HSPD1, and PDIA3) were identified in antigen processing and presentation pathway, of which HSPA8 was the core protein. Significant changes of Kcr and Khib in HSPA8 may increase ATP hydrolysis and promote antigen binding to MHC II molecule. In leukocyte transendothelial migration pathway, 7 DMPs (ACTN1, ACTN4, EZR, MSN, RAC1, RHOA, and VCL) were identified. MSN was the protein with the most modification sites in this pathway. In amino terminal ferm region of MSN, Kcr and Khib expression change may lead to the adhesion between leukocytes and endothelial cells, which was an important step of leukocyte migration. CONCLUSION Kcr and Khib may promote the antigen presentation and jointly regulate the tissue damage mediated by leukocyte migration in SLE patients, which may play key roles in the pathogenesis of SLE probably. Key Points • Antigen processing and presentation and leukocyte transendothelial migration may play key roles in the pathogenesis of SLE.
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Affiliation(s)
- Ting Xie
- Institute of Nephrology and Blood Purification, the First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, China
| | - Jingjing Dong
- Institute of Nephrology and Blood Purification, the First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, China
- Clinical Medical Research Center, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, 518020, Guangdong, China
| | - Xianqing Zhou
- Department of Pathology, Guangxi Key Laboratory of Metabolic Diseases Research, No.924 Hospital of PLA Joint Logistic Support Force, Guilin, 541002, Guangxi, China
| | - Donge Tang
- Clinical Medical Research Center, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, 518020, Guangdong, China
| | - Dandan Li
- Institute of Nephrology and Blood Purification, the First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, China
| | - Jiejing Chen
- Department of Pathology, Guangxi Key Laboratory of Metabolic Diseases Research, No.924 Hospital of PLA Joint Logistic Support Force, Guilin, 541002, Guangxi, China
| | - Yumei Chen
- Clinical Medical Research Center, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, 518020, Guangdong, China
| | - Huixuan Xu
- Clinical Medical Research Center, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, 518020, Guangdong, China
| | - Wen Xue
- Department of Pathology, Guangxi Key Laboratory of Metabolic Diseases Research, No.924 Hospital of PLA Joint Logistic Support Force, Guilin, 541002, Guangxi, China
| | - Dongzhou Liu
- Clinical Medical Research Center, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, 518020, Guangdong, China
| | - Xiaoping Hong
- Clinical Medical Research Center, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, 518020, Guangdong, China
| | - Fang Tang
- Department of Pathology, Guangxi Key Laboratory of Metabolic Diseases Research, No.924 Hospital of PLA Joint Logistic Support Force, Guilin, 541002, Guangxi, China.
| | - Lianghong Yin
- Institute of Nephrology and Blood Purification, the First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, China.
| | - Yong Dai
- Clinical Medical Research Center, the Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, 518020, Guangdong, China.
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Hanata N, Ota M, Tsuchida Y, Nagafuchi Y, Okamura T, Shoda H, Fujio K. Serum extracellular traps associate with the activation of myeloid cells in SLE patients with the low level of anti-DNA antibodies. Sci Rep 2022; 12:18397. [PMID: 36319843 PMCID: PMC9626644 DOI: 10.1038/s41598-022-23076-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 10/25/2022] [Indexed: 11/05/2022] Open
Abstract
Neutrophil extracellular traps (NETs) are involved in systemic lupus erythematosus (SLE). We sought to cluster SLE patients based on serum NET levels. Serum NET levels were higher in SLE patients than healthy controls. Frequencies of pleuritis and myositis were increased in patients with high serum NET levels. Serum NET levels negatively correlated with anti-double stranded DNA (anti-dsDNA) antibody titers and C1q-binding immune complexes, but positively correlated with C-reactive protein (CRP) and monocyte counts. Neutrophil transcriptome analysis demonstrated no difference in NET-associated signatures, irrespective of serum NET levels, suggesting anti-dsDNA antibody-mediated clearance of NETs. In serum, NET levels were significantly correlated with myeloid cell-derived inflammatory molecules. Serum NET-based cluster analysis revealed 3 groups of patients based on serum NET and CRP levels, anti-dsDNA antibody titers, and monocyte count. Monocytes were consistently activated following NET-containing immune complex (NET-IC) stimulation. In conclusion, SLE patients with high serum NET levels had lower anti-dsDNA antibody titers and higher inflammatory responses. NET-IC-stimulated monocytes might associate with an inflammatory response characterized by elevated CRP levels. These findings can apply to precision medicine, as inflammatory processes, rather than antibody-dependent processes, can be targeted in specific subpopulations of SLE patients.
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Affiliation(s)
- Norio Hanata
- grid.26999.3d0000 0001 2151 536XDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Mineto Ota
- grid.26999.3d0000 0001 2151 536XDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan ,grid.26999.3d0000 0001 2151 536XDepartment of Functional Genomics and Immunological Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yumi Tsuchida
- grid.26999.3d0000 0001 2151 536XDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yasuo Nagafuchi
- grid.26999.3d0000 0001 2151 536XDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan ,grid.26999.3d0000 0001 2151 536XDepartment of Functional Genomics and Immunological Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tomohisa Okamura
- grid.26999.3d0000 0001 2151 536XDepartment of Functional Genomics and Immunological Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hirofumi Shoda
- grid.26999.3d0000 0001 2151 536XDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Keishi Fujio
- grid.26999.3d0000 0001 2151 536XDepartment of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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Wang M, Ishikawa T, Lai Y, Nallapothula D, Singh RR. Diverse Roles of NETosis in the Pathogenesis of Lupus. Front Immunol 2022; 13:895216. [PMID: 35686129 PMCID: PMC9170953 DOI: 10.3389/fimmu.2022.895216] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Accepted: 04/27/2022] [Indexed: 11/13/2022] Open
Abstract
NETosis is a form of neutrophil cell death during which extracellular fibrillary structures composed of cytosolic and granule proteins assembled on scaffolds of decondensed chromatin, called neutrophil extracellular traps (NETs), are released. NETs normally contribute to host immune defense. Accumulating evidence implicates aberrant NET production and/or reduced NET clearance, along with alterations of molecules involved in NETosis pathway, in humans and animals with lupus. The extruded nuclear antigens released by NET are a source of autoantigens, which can contribute to the breakdown of self-tolerance in lupus. Excessive NET can also promote the production of pro-inflammatory cytokine interferon-α, elicit direct cytotoxic effect on various renal cells, and cause capillary necrosis and podocyte loss. Additionally, NET can induce endothelial-to-mesenchymal transdifferentiation, which can promote activated myofibroblasts leading to extracellular matrix production. Thus, aberrant NETosis can play diverse roles, including autoantibody production, inflammation, and tissue damage, at different stages of lupus pathogenesis. Evidence suggests that treatments currently used in lupus may reduce NETosis, suggesting a potential utility of targeting NETosis to treat lupus. In fact, several approaches are being experimented to therapeutically target pathways of NETosis. Future studies should precisely delineate distinct roles of NETosis at different stages of lupus pathogenesis in humans, which would offer a rational basis for NETosis-targeting treatments in the clinic.
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Affiliation(s)
- Meiying Wang
- Autoimmunity and Tolerance Laboratory, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA, United States.,Department of Rheumatology and Immunology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Tatsuya Ishikawa
- Autoimmunity and Tolerance Laboratory, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA, United States
| | - Yupeng Lai
- Department of Rheumatology and Immunology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Dhiraj Nallapothula
- Autoimmunity and Tolerance Laboratory, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA, United States
| | - Ram Raj Singh
- Autoimmunity and Tolerance Laboratory, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles (UCLA), Los Angeles, CA, United States.,Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States.,Molecular Toxicology Interdepartmental Program, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States.,Jonsson Comprehensive Cancer Center, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States
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7
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Polymorphonuclear Neutrophils in Rheumatoid Arthritis and Systemic Lupus Erythematosus: More Complicated Than Anticipated. IMMUNO 2022. [DOI: 10.3390/immuno2010007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Polymorphonuclear neutrophils (PMN) are the most abundant leucocytes in the circulation in humans. They represent a heterogeneous population exerting diverse functions through several activities. Usually described as typical pro-inflammatory cells, immunomodulatory properties of PMNs have been reported. Among others, once activated and depending on the stimulus, PMNs expel neutrophil extracellular traps (NET) in the extracellular space. NETs are complexes made of DNA and granule proteins representing an innate immune mechanism fighting infections. Nevertheless, an excess of NET formation might be involved in the development of inflammatory or autoimmune responses. Systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA) are two chronic, inflammatory, autoimmune diseases of unknown etiology and affecting mostly women. Several abnormal or non-classical functions of PMNs or PMN sub-populations have been described in SLE and RA. Particularly, NETs have been suggested to trigger pro-inflammatory responses by exposing pro-inflammatory mediators. Likewise, NETs may be the targets of autoantibodies or even might trigger the development of autoantibodies by exposing autoantigens. In the present review, we will summarize heterogeneous properties of human PMNs and we will discuss recent evidence linking PMNs and NETs to the pathogenesis of both SLE and RA.
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Schall N, Daubeuf F, Marsol C, Gizzi P, Frossard N, Bonnet D, Galzi JL, Muller S. A Selective Neutraligand for CXCL12/SDF-1α With Beneficial Regulatory Functions in MRL/Lpr Lupus Prone Mice. Front Pharmacol 2021; 12:752194. [PMID: 34744730 PMCID: PMC8566942 DOI: 10.3389/fphar.2021.752194] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 09/28/2021] [Indexed: 11/13/2022] Open
Abstract
Dysregulation of CXCL12/SDF-1-CXCR4/CD184 signaling is associated with inflammatory diseases and notably with systemic lupus erythematosus. Issued from the lead molecule chalcone-4, the first neutraligand of the CXCL12 chemokine, LIT-927 was recently described as a potent analogue with improved solubility and stability. We aimed to investigate the capacity of LIT-927 to correct immune alterations in lupus-prone MRL/lpr mice and to explore the mechanism of action implemented by this small molecule in this model. We found that in contrast to AMD3100, an antagonist of CXCR4 and agonist of CXCR7, LIT-927 reduces the excessive number of several B/T lymphocyte subsets occurring in the blood of sick MRL/lpr mice (including CD3+/CD4-/CD8-/B220+ double negative T cells). In vitro, LIT-927 downregulated the overexpression of several activation markers on splenic MRL/lpr lymphocytes. It exerted effects on the CXCR4 pathway in MRL/lpr CD4+ T spleen cells. The results underline the importance of the CXCL12/CXCR4 axis in lupus pathophysiology. They indicate that neutralizing CXCL12 by the neutraligand LIT-927 can attenuate hyperactive lymphocytes in lupus. This mode of intervention might represent a novel strategy to control a common pathophysiological mechanism occurring in inflammatory diseases.
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Affiliation(s)
- Nicolas Schall
- CNRS UMR7242, Biotechnology and Cell Signaling, Ecole Supérieure de Biotechnologie de Strasbourg, Strasbourg University/Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, France
| | - François Daubeuf
- CNRS UMR7200, Laboratoire d'innovation Thérapeutique, Faculté de Pharmacie, Strasbourg University/Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, France.,CNRS UMS3286, Plate-forme de Chimie Biologique Intégrative de Strasbourg, Strasbourg University/ Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, France
| | - Claire Marsol
- CNRS UMR7200, Laboratoire d'innovation Thérapeutique, Faculté de Pharmacie, Strasbourg University/Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, France
| | - Patrick Gizzi
- CNRS UMS3286, Plate-forme de Chimie Biologique Intégrative de Strasbourg, Strasbourg University/ Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, France
| | - Nelly Frossard
- CNRS UMR7200, Laboratoire d'innovation Thérapeutique, Faculté de Pharmacie, Strasbourg University/Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, France
| | - Dominique Bonnet
- CNRS UMR7200, Laboratoire d'innovation Thérapeutique, Faculté de Pharmacie, Strasbourg University/Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, France
| | - Jean-Luc Galzi
- CNRS UMR7242, Biotechnology and Cell Signaling, Ecole Supérieure de Biotechnologie de Strasbourg, Strasbourg University/Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, France
| | - Sylviane Muller
- CNRS UMR7242, Biotechnology and Cell Signaling, Ecole Supérieure de Biotechnologie de Strasbourg, Strasbourg University/Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, France.,Fédération Hospitalo-Universitaire (FHU) OMICARE, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg University, Strasbourg, France.,University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
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9
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Zhu S, Yu Y, Ren Y, Xu L, Wang H, Ling X, Jin L, Hu Y, Zhang H, Miao C, Guo K. The emerging roles of neutrophil extracellular traps in wound healing. Cell Death Dis 2021; 12:984. [PMID: 34686654 PMCID: PMC8536667 DOI: 10.1038/s41419-021-04294-3] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 09/27/2021] [Accepted: 10/06/2021] [Indexed: 12/20/2022]
Abstract
Delayed wound healing causes problems for many patients both physically and psychologically, contributing to pain, economic burden, loss of function, and even amputation. Although many factors affect the wound healing process, abnormally prolonged or augmented inflammation in the wound site is a common cause of poor wound healing. Excessive neutrophil extracellular trap (NET) formation during this phase may amplify inflammation and hinder wound healing. However, the roles of NETs in wound healing are still unclear. Herein, we briefly introduce NET formation and discuss the possible NET-related mechanisms in wound healing. We conclude with a discussion of current studies, focusing on the roles of NETs in diabetic and normoglycemic wounds and the effectiveness of NET-targeting treatments in wound healing.
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Affiliation(s)
- Shuainan Zhu
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ying Yu
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yun Ren
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Liying Xu
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Huilin Wang
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xiaomin Ling
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lin Jin
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yan Hu
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Hao Zhang
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China.
| | - Changhong Miao
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China.
| | - Kefang Guo
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China.
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10
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To Trap a Pathogen: Neutrophil Extracellular Traps and Their Role in Mucosal Epithelial and Skin Diseases. Cells 2021; 10:cells10061469. [PMID: 34208037 PMCID: PMC8230648 DOI: 10.3390/cells10061469] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/28/2021] [Accepted: 06/03/2021] [Indexed: 12/18/2022] Open
Abstract
Neutrophils are the most abundant circulating innate immune cells and comprise the first immune defense line, as they are the most rapidly recruited cells at sites of infection or inflammation. Their main microbicidal mechanisms are degranulation, phagocytosis, cytokine secretion and the formation of extracellular traps. Neutrophil extracellular traps (NETs) are a microbicidal mechanism that involves neutrophil death. Since their discovery, in vitro and in vivo neutrophils have been challenged with a range of stimuli capable of inducing or inhibiting NET formation, with the objective to understand its function and regulation in health and disease. These networks composed of DNA and granular components are capable of immobilizing and killing pathogens. They comprise enzymes such as myeloperoxidase, elastase, cathepsin G, acid hydrolases and cationic peptides, all with antimicrobial and antifungal activity. Therefore, the excessive formation of NETs can also lead to tissue damage and promote local and systemic inflammation. Based on this concept, in this review, we focus on the role of NETs in different infectious and inflammatory diseases of the mucosal epithelia and skin.
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11
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Li L, Yu X, Liu J, Wang Z, Li C, Shi J, Sun L, Liu Y, Zhang F, Chen H, Zheng W. Neutrophil Extracellular Traps Promote Aberrant Macrophages Activation in Behçet's Disease. Front Immunol 2021; 11:590622. [PMID: 33633724 PMCID: PMC7901995 DOI: 10.3389/fimmu.2020.590622] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 12/23/2020] [Indexed: 02/05/2023] Open
Abstract
Neutrophil extracellular traps (NETs) are upregulated and promote thrombosis in Behçet's disease (BD). However, whether NETs promote autoinflammation in BD remains unclear. This study aimed to investigate the potential role of NETs in promoting macrophage activation in BD. Firstly, we quantified NETs by measuring double-stranded DNA (dsDNA) using PicoGreen and calculating the proportion of NETosis. Then macrophages were stimulated with BD- or healthy controls (HC)-derived NETs, and IL-8 and TNF-α production and IFN-γ+ CD4+ T cells differentiation were measured using ELISA and flow cytometry, respectively. The protein components in NETs were analyzed by western blot. Macrophages were stimulated with Histone H4 neutralized NETs, and IL-8 and TNF-α production were measured using ELISA. The level of 8-hydroxydeoxyguanosine (8-OHdG) DNA in NETs was measured using ELISA. The levels of reactive oxygen species (ROS) in serum and neutrophils were measured using ROS probes by a microplate reader and flow cytometry. We found that circulating NETs and neutrophil-derived NETs were significantly higher in BD than HC. BD NETs stimulated macrophages produced higher levels of IL-8 and TNF-α, and promoted IFN-γ+ CD4+ T cells differentiation. BD NETs were enriched in Histone H4, and neutralizing Histone H4 abrogated the BD NETs-mediated IL-8 production by macrophages, but not TNF-α. Also, BD neutrophils produced more 8-OHdG DNA than HC neutrophils, and the percentage of 8-OHdG DNA in dsDNA from BD neutrophils was also higher than that of HC neutrophils. The ROS levels in serum and neutrophils were both higher in BD than HC. Our findings suggested that excessive BD NETs promoted macrophages activation and facilitated IFN-γ+ CD4+ T cells differentiation. Higher levels of Histone H4 and oxidized DNA in BD NETs might mediate macrophages hyperactivation.
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Affiliation(s)
- Lu Li
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, The Ministry of Education Key Laboratory, National Clinical Research Center for Dermatologic and Immunologic Diseases, Beijing, China.,School of Nursing, Peking Union Medical College, Beijing, China
| | - Xin Yu
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, The Ministry of Education Key Laboratory, National Clinical Research Center for Dermatologic and Immunologic Diseases, Beijing, China
| | - Jinjing Liu
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, The Ministry of Education Key Laboratory, National Clinical Research Center for Dermatologic and Immunologic Diseases, Beijing, China
| | - Zhimian Wang
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, The Ministry of Education Key Laboratory, National Clinical Research Center for Dermatologic and Immunologic Diseases, Beijing, China
| | - Chaoran Li
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, The Ministry of Education Key Laboratory, National Clinical Research Center for Dermatologic and Immunologic Diseases, Beijing, China
| | - Jing Shi
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, The Ministry of Education Key Laboratory, National Clinical Research Center for Dermatologic and Immunologic Diseases, Beijing, China
| | - Luxi Sun
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, The Ministry of Education Key Laboratory, National Clinical Research Center for Dermatologic and Immunologic Diseases, Beijing, China
| | - Yi Liu
- Department of Rheumatology and Immunology, Rare Diseases Center, West China Hospital, Sichuan University, Chengdu, China
| | - Fengchun Zhang
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, The Ministry of Education Key Laboratory, National Clinical Research Center for Dermatologic and Immunologic Diseases, Beijing, China
| | - Hua Chen
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, The Ministry of Education Key Laboratory, National Clinical Research Center for Dermatologic and Immunologic Diseases, Beijing, China
| | - Wenjie Zheng
- Department of Rheumatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, The Ministry of Education Key Laboratory, National Clinical Research Center for Dermatologic and Immunologic Diseases, Beijing, China
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12
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Gupta S, Kaplan MJ. Bite of the wolf: innate immune responses propagate autoimmunity in lupus. J Clin Invest 2021; 131:144918. [PMID: 33529160 PMCID: PMC7843222 DOI: 10.1172/jci144918] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The etiopathogenesis of systemic lupus erythematosus (SLE), a clinically heterogeneous multisystemic syndrome that derives its name from the initial characterization of facial lesions that resemble the bite of a wolf, is considered a complex, multifactorial interplay between underlying genetic susceptibility factors and the environment. Prominent pathogenic factors include the induction of aberrant cell death pathways coupled with defective cell death clearance mechanisms that promote excessive externalization of modified cellular and nuclear debris with subsequent loss of tolerance to a wide variety of autoantigens and innate and adaptive immune dysregulation. While abnormalities in adaptive immunity are well recognized and are key to the pathogenesis of SLE, recent findings have emphasized fundamental roles of the innate immune system in the initiation and propagation of autoimmunity and the development of organ damage in this disease. This Review focuses on recent discoveries regarding the role of components of the innate immune system, specifically neutrophils and interferons, in promoting various aspects of lupus pathogenesis, with potential implications for novel therapeutic strategies.
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Tsai CY, Shen CY, Liu CW, Hsieh SC, Liao HT, Li KJ, Lu CS, Lee HT, Lin CS, Wu CH, Kuo YM, Yu CL. Aberrant Non-Coding RNA Expression in Patients with Systemic Lupus Erythematosus: Consequences for Immune Dysfunctions and Tissue Damage. Biomolecules 2020; 10:biom10121641. [PMID: 33291347 PMCID: PMC7762297 DOI: 10.3390/biom10121641] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 12/11/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is a complex systemic autoimmune disease with heterogeneous clinical manifestations. A diverse innate and adaptive immune dysregulation is involved in the immunopathogenesis of SLE. The dysregulation of immune-related cells may derive from the intricate interactions among genetic, epigenetic, environmental, and immunological factors. Of these contributing factors, non-coding RNAs (ncRNAs), including microRNAs (miRNAs, miRs), and long non-coding RNAs (lncRNAs) play critical roles in the post-transcriptional mRNA expression of cytokines, chemokines, and growth factors, which are essential for immune modulation. In the present review, we emphasize the roles of ncRNA expression in the immune-related cells and cell-free plasma, urine, and tissues contributing to the immunopathogenesis and tissue damage in SLE. In addition, the circular RNAs (circRNA) and their post-translational regulation of protein synthesis in SLE are also briefly described. We wish these critical reviews would be useful in the search for biomarkers/biosignatures and novel therapeutic strategies for SLE patients in the future.
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MESH Headings
- Adaptive Immunity/genetics
- Autoimmunity/genetics
- Chemokines/genetics
- Chemokines/immunology
- Dendritic Cells/immunology
- Dendritic Cells/pathology
- Gene Expression Regulation
- Humans
- Immunity, Innate/genetics
- Intercellular Signaling Peptides and Proteins/genetics
- Intercellular Signaling Peptides and Proteins/immunology
- Killer Cells, Natural/immunology
- Killer Cells, Natural/pathology
- Lupus Erythematosus, Systemic/blood
- Lupus Erythematosus, Systemic/genetics
- Lupus Erythematosus, Systemic/immunology
- Lupus Erythematosus, Systemic/pathology
- MicroRNAs/genetics
- MicroRNAs/immunology
- Neutrophils/immunology
- Neutrophils/pathology
- RNA, Circular/genetics
- RNA, Circular/immunology
- RNA, Long Noncoding/genetics
- RNA, Long Noncoding/immunology
- RNA, Messenger/genetics
- RNA, Messenger/immunology
- T-Lymphocytes/immunology
- T-Lymphocytes/pathology
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Affiliation(s)
- Chang-Youh Tsai
- Division of Allergy, Immunology & Rheumatology, Taipei Veterans General Hospital and National Yang-Ming University, Taipei 11217, Taiwan; (C.-W.L.); (H.-T.L.)
- Correspondence: (C.-Y.T.); (C.-L.Y.)
| | - Chieh-Yu Shen
- Division of Rheumatology, Immunology, & Allergy, Department of Internal Medicine, National Taiwan University Hospital, Taipei 10002, Taiwan; (C.-Y.S.); (S.-C.H.); (K.-J.L.); (C.-S.L.); (C.-H.W.); (Y.-M.K.)
- Institute of Clinical Medicine, National Taiwan University School of Medicine, Taipei 10002, Taiwan
| | - Chih-Wei Liu
- Division of Allergy, Immunology & Rheumatology, Taipei Veterans General Hospital and National Yang-Ming University, Taipei 11217, Taiwan; (C.-W.L.); (H.-T.L.)
| | - Song-Chou Hsieh
- Division of Rheumatology, Immunology, & Allergy, Department of Internal Medicine, National Taiwan University Hospital, Taipei 10002, Taiwan; (C.-Y.S.); (S.-C.H.); (K.-J.L.); (C.-S.L.); (C.-H.W.); (Y.-M.K.)
| | - Hsien-Tzung Liao
- Division of Allergy, Immunology & Rheumatology, Taipei Veterans General Hospital and National Yang-Ming University, Taipei 11217, Taiwan; (C.-W.L.); (H.-T.L.)
| | - Ko-Jen Li
- Division of Rheumatology, Immunology, & Allergy, Department of Internal Medicine, National Taiwan University Hospital, Taipei 10002, Taiwan; (C.-Y.S.); (S.-C.H.); (K.-J.L.); (C.-S.L.); (C.-H.W.); (Y.-M.K.)
| | - Cheng-Shiun Lu
- Division of Rheumatology, Immunology, & Allergy, Department of Internal Medicine, National Taiwan University Hospital, Taipei 10002, Taiwan; (C.-Y.S.); (S.-C.H.); (K.-J.L.); (C.-S.L.); (C.-H.W.); (Y.-M.K.)
| | - Hui-Ting Lee
- Mackay Memorial Hospital and Mackay College of Medicine, Taipei 10449, Taiwan;
| | - Cheng-Sung Lin
- Department of Thoracic Surgery, Ministry of Health and Welfare Taipei Hospital, New Taipei City 24213, Taiwan;
| | - Cheng-Han Wu
- Division of Rheumatology, Immunology, & Allergy, Department of Internal Medicine, National Taiwan University Hospital, Taipei 10002, Taiwan; (C.-Y.S.); (S.-C.H.); (K.-J.L.); (C.-S.L.); (C.-H.W.); (Y.-M.K.)
| | - Yu-Min Kuo
- Division of Rheumatology, Immunology, & Allergy, Department of Internal Medicine, National Taiwan University Hospital, Taipei 10002, Taiwan; (C.-Y.S.); (S.-C.H.); (K.-J.L.); (C.-S.L.); (C.-H.W.); (Y.-M.K.)
| | - Chia-Li Yu
- Division of Rheumatology, Immunology, & Allergy, Department of Internal Medicine, National Taiwan University Hospital, Taipei 10002, Taiwan; (C.-Y.S.); (S.-C.H.); (K.-J.L.); (C.-S.L.); (C.-H.W.); (Y.-M.K.)
- Correspondence: (C.-Y.T.); (C.-L.Y.)
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14
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Carrillo-Vázquez DA, Jardón-Valadez E, Torres-Ruiz J, Juárez-Vega G, Maravillas-Montero JL, Meza-Sánchez DE, Domínguez-López ML, Varela JCA, Gómez-Martín D. Conformational changes in myeloperoxidase induced by ubiquitin and NETs containing free ISG15 from systemic lupus erythematosus patients promote a pro-inflammatory cytokine response in CD4 + T cells. J Transl Med 2020; 18:429. [PMID: 33176801 PMCID: PMC7659105 DOI: 10.1186/s12967-020-02604-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 11/05/2020] [Indexed: 12/29/2022] Open
Abstract
Background Neutrophil extracellular traps (NETs) from patients with systemic lupus erythematosus (SLE) are characterized by lower ubiquitylation and myeloperoxidase (MPO) as a substrate. The structural and functional effect of such modification and if there are additional post-translational modifications (PTMs) are unknown. Methods To assess the expression and functional role of PTMs in NETs of patients with SLE; reactivation, proliferation and cytokine production was evaluated by flow cytometry using co-cultures with dendritic cells (DC) and CD4+ from SLE patients and healthy controls. The impact of ubiquitylation on MPO was assessed by molecular dynamics. The expression of ISG15 in NETs was evaluated by immunofluorescence and Western Blot. Results Fifteen patients with SLE and ten healthy controls were included. In the co-cultures of CD4+ lymphocytes with DC stimulated with ubiquitylated MPO or recombinant MPO, a higher expression of IFNγ and IL-17A was found in CD4+ from SLE patients (p < 0.05). Furthermore, with DC stimulated with ubiquitylated MPO a trend towards increased expression of CD25 and Ki67 was found in lupus CD4+ lymphocytes, while the opposite was documented in controls (p < 0.05). Through molecular dynamics we found the K129-K488-K505 residues of MPO as susceptible to ubiquitylation. Ubiquitylation affects the hydration status of the HEME group depending on the residue to which it is conjugated. R239 was found near by the HEME group when the ubiquitin was in K488-K505. In addition, we found greater expression of ISG15 in the SLE NETs vs controls (p < 0.05), colocalization with H2B (r = 0.81) only in SLE samples and increased production of IFNγ in PBMCs stimulated with lupus NETs compared to healthy controls NETs. Conclusion The ubiquitylated MPO has a differential effect on the induction of reactivation of CD4+ lymphocytes in patients with SLE, which may be related to structural changes by ubiquitylation at the catalytic site of MPO. Besides a lower ubiquitylation pattern, NETs of patients with SLE are characterized by the expression of ISG15, and the induction of IFNγ by Th1 cells.
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Affiliation(s)
- Daniel Alberto Carrillo-Vázquez
- Department of Internal Medicine, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga 15, Tlalpan, 14080, Mexico City, Mexico.,Department of Immunology and Rheumatology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga 15, Tlalpan, 14080, Mexico City, Mexico.,Department of Immunology, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Eduardo Jardón-Valadez
- Earth Resources Department, Universidad Autónoma Metropolitana, 52005, Lerma, Estado de Mexico, Mexico
| | - Jiram Torres-Ruiz
- Department of Immunology and Rheumatology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga 15, Tlalpan, 14080, Mexico City, Mexico.,Emergency Medicine Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga 15, Tlalpan, 14080, Mexico City, Mexico
| | - Guillermo Juárez-Vega
- Red de Apoyo a La Investigación, Coordinación de Investigación Científica, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - José Luis Maravillas-Montero
- Red de Apoyo a La Investigación, Coordinación de Investigación Científica, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - David Eduardo Meza-Sánchez
- Red de Apoyo a La Investigación, Coordinación de Investigación Científica, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - María Lilia Domínguez-López
- Department of Immunology, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Jorge Carlos Alcocer Varela
- Department of Immunology and Rheumatology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga 15, Tlalpan, 14080, Mexico City, Mexico
| | - Diana Gómez-Martín
- Department of Immunology and Rheumatology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga 15, Tlalpan, 14080, Mexico City, Mexico. .,Red de Apoyo a La Investigación, Coordinación de Investigación Científica, Universidad Nacional Autónoma de México, Mexico City, Mexico.
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15
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Anti-Tyro3 IgG Associates with Disease Activity and Reduces Efferocytosis of Macrophages in New-Onset Systemic Lupus Erythematosus. J Immunol Res 2020; 2020:2180708. [PMID: 33224991 PMCID: PMC7673931 DOI: 10.1155/2020/2180708] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 09/11/2020] [Accepted: 10/20/2020] [Indexed: 11/17/2022] Open
Abstract
Background Systemic lupus erythematosus (SLE) is a disease characterized by the production of a large number of autoantibodies. Defected phagocytosis of macrophage plays an important role in innate immunity in the pathogenesis of SLE. Tyro3 is a receptor responsible for the recognition of apoptotic cells during efferocytosis by macrophages. To investigate the role of Tyro3 receptor in macrophages' efferocytosis of apoptotic cells in SLE, we aimed to reveal the clinical relevance and impact of Tyro3 autoantibody on SLE. Methods The serum levels of IgG-type autoantibody against Tyro3 receptor were detected in new-onset, treatment-naïve SLE patients (n = 70), rheumatoid arthritis (RA) (n = 24), primary Sjögren's Syndrome (pSS) (n = 21), and healthy controls (HCs) (n = 70) using enzyme-linked immunosorbent assay (ELISA). The effects of purified Tyro3 autoantibody from SLE patients on the efferocytosis of human monocyte-derived macrophages were measured by flow cytometry and immunofluorescence. Results The serum levels of IgG-type autoantibody against Tyro3 receptor were significantly elevated in patients with SLE compared to RA, pSS, and HCs (all p < 0.0001). The levels of anti-Tyro3 IgG were positively associated with the SLE disease activity index (SLEDAI) score (r = 0.254, p = 0.034), erythrocyte sedimentation rate (ESR) (r = 0.430, p < 0.001), C-reactive protein (CRP) (r = 0.246, p = 0.049), and immunoglobulin G (IgG) (r = 0.408, p = 0.001) and negatively associated with haemoglobin (Hb) (r = -0.294, p = 0.014). ROC curves illustrated that the anti-Tyro3 antibody could differentiate patients with SLE from HCs. Furthermore, flow cytometry and immunofluorescence demonstrated that purified anti-Tyro3 IgG inhibited the efferocytosis of macrophages (p = 0.004 and 0.044, respectively) compared with unconjugated human IgG. Conclusions These observations indicated that autoantibody against Tyro3 was associated with disease activity and could impair efferocytosis of macrophages. It might be a potential novel disease biomarker and might be involved in the pathogenesis of SLE.
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16
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Santocki M, Kolaczkowska E. On Neutrophil Extracellular Trap (NET) Removal: What We Know Thus Far and Why So Little. Cells 2020; 9:cells9092079. [PMID: 32932841 PMCID: PMC7565917 DOI: 10.3390/cells9092079] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/05/2020] [Accepted: 09/08/2020] [Indexed: 12/17/2022] Open
Abstract
Although neutrophil extracellular traps (NETs) were discovered only 16 years ago, they have already taken us from heaven to hell as we learned that apart from beneficial trapping of pathogens, they cause, or contribute to, numerous disorders. The latter is connected to their persistent presence in the blood or tissue, and we hardly know how they are removed in mild pathophysiological conditions and why their removal is impaired in multiple severe pathological conditions. Herein, we bring together all data available up till now on how NETs are cleared—from engaged cells, their phenotypes, to involved enzymes and molecules. Moreover, we hypothesize on why NET removal is challenged in multiple disorders and propose further directions for studies on NET removal as well as possible therapeutic strategies to have them cleared.
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17
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Bergmann CB, Salyer CE, Beckmann N, Caldwell CC. Intraperitoneal Neutrophil IL-10 production is promoted by interferon γ in a murine model of sepsis model in the acute phase of sepsis. Biochem Biophys Res Commun 2020; 530:278-284. [PMID: 32828299 DOI: 10.1016/j.bbrc.2020.07.089] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 07/19/2020] [Indexed: 01/18/2023]
Abstract
The disease burden of sepsis continues to increase, with intraabdominal contamination being a significant source of infection. Sepsis is a syndrome involving both an increase in systemic inflammation as well as a regulatory component. We have previously demonstrated that neutrophils are significant IL-10 producers in the abdomen during sepsis. Here, we sought to further characterize these neutrophils and elucidate potential underlying mechanisms resulting in IL-10 generation. Using transcriptional reporter mice, we observed that IL-10 producing neutrophils were activated, non-apoptotic, and expressed C-X-C chemokine receptor type 4-expressing. Further, we observed that active Signal Transducer and Activator of Transcription 1 expression was significantly increased in IL-10 producing versus non-IL-10 producing neutrophils. During sepsis, IFN-γ blockade lead to a decrease of neutrophil IL-10 production, while peritoneal CD4 T cells were found to be the most numerous acute producers of IFN-γ. Altogether, this report demonstrates that during sepsis, mature neutrophils can potentially dampen local inflammation by IL-10 production and this can be orchestrated by CD4 T cells through an IFN-γ dependent manner.
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Affiliation(s)
- Christian B Bergmann
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Christen E Salyer
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Nadine Beckmann
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Charles C Caldwell
- Division of Research, Department of Surgery, College of Medicine, University of Cincinnati, Cincinnati, OH, USA; Division of Research, Shriners Hospital for Children, Cincinnati, OH, USA.
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18
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Yousefi S, Simon D, Stojkov D, Karsonova A, Karaulov A, Simon HU. In vivo evidence for extracellular DNA trap formation. Cell Death Dis 2020; 11:300. [PMID: 32355207 PMCID: PMC7193637 DOI: 10.1038/s41419-020-2497-x] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/01/2020] [Accepted: 04/14/2020] [Indexed: 12/14/2022]
Abstract
Extracellular DNA trap formation is a cellular function of neutrophils, eosinophils, and basophils that facilitates the immobilization and killing of invading microorganisms in the extracellular milieu. To form extracellular traps, granulocytes release a scaffold consisting of mitochondrial DNA in association with granule proteins. As we understand more about the molecular mechanism for the formation of extracellular DNA traps, the in vivo function of this phenomenon under pathological conditions remains an enigma. In this article, we critically review the literature to summarize the evidence for extracellular DNA trap formation under in vivo conditions. Extracellular DNA traps have not only been detected in infectious diseases but also in chronic inflammatory diseases, as well as in cancer. While on the one hand, extracellular DNA traps clearly exhibit an important function in host defense, it appears that they can also contribute to the maintenance of inflammation and metastasis, suggesting that they may represent an interesting drug target for such pathological conditions.
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Affiliation(s)
- Shida Yousefi
- Institute of Pharmacology, University of Bern, Bern, Switzerland
| | - Dagmar Simon
- Department of Dermatology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Darko Stojkov
- Institute of Pharmacology, University of Bern, Bern, Switzerland
| | - Antonina Karsonova
- Department of Clinical Immunology and Allergology, Sechenov University, Moscow, Russia
| | - Alexander Karaulov
- Department of Clinical Immunology and Allergology, Sechenov University, Moscow, Russia
| | - Hans-Uwe Simon
- Institute of Pharmacology, University of Bern, Bern, Switzerland.
- Department of Clinical Immunology and Allergology, Sechenov University, Moscow, Russia.
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Fousert E, Toes R, Desai J. Neutrophil Extracellular Traps (NETs) Take the Central Stage in Driving Autoimmune Responses. Cells 2020; 9:cells9040915. [PMID: 32276504 PMCID: PMC7226846 DOI: 10.3390/cells9040915] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/03/2020] [Accepted: 04/05/2020] [Indexed: 12/15/2022] Open
Abstract
Following fifteen years of research, neutrophil extracellular traps (NETs) are widely reported in a large range of inflammatory infectious and non-infectious diseases. Cumulating evidences from in vitro, in vivo and clinical diagnostics suggest that NETs may play a crucial role in inflammation and autoimmunity in a variety of autoimmune diseases, such as rheumatoid arthritis (RA), systemic lupus erythematosus (SLE) and anti-neutrophil cytoplasmic antibodies (ANCA)-associated vasculitis (AAV). Most likely, NETs contribute to breaking self-tolerance in autoimmune diseases in several ways. During this review, we discuss the current knowledge on how NETs could drive autoimmune responses. NETs can break self-tolerance by being a source of autoantigens for autoantibodies found in autoimmune diseases, such as anti-citrullinated protein antibodies (ACPAs) in RA, anti-dsDNA in SLE and anti-myeloperoxidase and anti-protein 3 in AAV. Moreover, NET components could accelerate the inflammatory response by mediating complement activation, acting as danger-associated molecular patterns (DAMPs) and inflammasome activators, for example. NETs also can activate other immune cells, such as B cells, antigen-presenting cells and T cells. Additionally, impaired clearance of NETs in autoimmune diseases prolongs the presence of active NETs and their components and, in this way, accelerate immune responses. NETs have not only been implicated as drivers of inflammation, but also are linked to resolution of inflammation. Therefore, NETs may be central regulators of inflammation and autoimmunity, serve as biomarkers, as well as promising targets for future therapeutics of inflammatory autoimmune diseases.
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20
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Native/citrullinated LL37-specific T-cells help autoantibody production in Systemic Lupus Erythematosus. Sci Rep 2020; 10:5851. [PMID: 32245990 PMCID: PMC7125190 DOI: 10.1038/s41598-020-62480-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 03/12/2020] [Indexed: 01/05/2023] Open
Abstract
LL37 exerts a dual pathogenic role in psoriasis. Bound to self-DNA/RNA, LL37 licenses autoreactivity by stimulating plasmacytoid dendritic cells-(pDCs)-Type I interferon (IFN-I) and acts as autoantigen for pathogenic Th17-cells. In systemic lupus erythematosus (SLE), LL37 also triggers IFN-I in pDCs and is target of pathogenic autoantibodies. However, whether LL37 activates T-cells in SLE and how the latter differ from psoriasis LL37-specific T-cells is unknown. Here we found that 45% SLE patients had circulating T-cells strongly responding to LL37, which correlate with anti-LL37 antibodies/disease activity. In contrast to psoriatic Th17-cells, these LL37-specific SLE T-cells displayed a T-follicular helper-(TFH)-like phenotype, with CXCR5/Bcl-6 and IL-21 expression, implicating a role in stimulation of pathogenic autoantibodies. Accordingly, SLE LL37-specific T-cells promoted B-cell secretion of pathogenic anti-LL37 antibodies in vitro. Importantly, we identified abundant citrullinated LL37 (cit-LL37) in SLE tissues (skin and kidney) and observed very pronounced reactivity of LL37-specific SLE T-cells to cit-LL37, compared to native-LL37, which was much more occasional in psoriasis. Thus, in SLE, we identified LL37-specific T-cells with a distinct functional specialization and antigenic specificity. This suggests that autoantigenic specificity is independent from the nature of the autoantigen, but rather relies on the disease-specific milieu driving T-cell subset polarization and autoantigen modifications.
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Abstract
BACKGROUND Systemic lupus erythematosis (SLE) is a complex and clinically heterogeneous autoimmune disease. A variety of immunological defects contribute to SLE, including dysregulated innate and adaptive immune response. A clearer understanding of the mechanisms driving disease pathogenesis combined with recent advances in medical science is predicted to enable accelerated progress towards improved SLE-personalized approaches to treatment. The aim of this review was to clarify the immunological pathogenesis and treatment of SLE. DATA SOURCES Literature reviews and original research articles were collected from database, including PubMed and Wanfang. Relevant articles about SLE were included. RESULTS Breakdown of self-tolerance is the main pathogenesis of SLE. The innate and adaptive immune networks are interlinked with each other through cytokines, complements, immune complexes and kinases of the intracellular machinery. Treatments targeted at possible targets of immunity have been assessed in clinical trials. Most of them did not show better safety and efficacy than traditional treatments. However, novel targeting treatments are still being explored. CONCLUSIONS Dysregulated immune response plays a critical role in SLE, including innate immunity and adaptive immunity. Biologic agents that aim to specifically target abnormal immune processes were assessing and may bring new hope to SLE patients.
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Epigenetic Mechanisms and Posttranslational Modifications in Systemic Lupus Erythematosus. Int J Mol Sci 2019; 20:ijms20225679. [PMID: 31766160 PMCID: PMC6888206 DOI: 10.3390/ijms20225679] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/08/2019] [Accepted: 10/19/2019] [Indexed: 12/15/2022] Open
Abstract
The complex physiology of eukaryotic cells is regulated through numerous mechanisms, including epigenetic changes and posttranslational modifications. The wide-ranging diversity of these mechanisms constitutes a way of dynamic regulation of the functionality of proteins, their activity, and their subcellular localization as well as modulation of the differential expression of genes in response to external and internal stimuli that allow an organism to respond or adapt to accordingly. However, alterations in these mechanisms have been evidenced in several autoimmune diseases, including systemic lupus erythematosus (SLE). The present review aims to provide an approach to the current knowledge of the implications of these mechanisms in SLE pathophysiology.
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Lazzaretto B, Fadeel B. Intra- and Extracellular Degradation of Neutrophil Extracellular Traps by Macrophages and Dendritic Cells. THE JOURNAL OF IMMUNOLOGY 2019; 203:2276-2290. [PMID: 31519860 DOI: 10.4049/jimmunol.1800159] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 08/09/2019] [Indexed: 12/15/2022]
Abstract
Neutrophil extracellular traps (NETs) composed of nuclear DNA associated with histones and granule proteins are involved in the extracellular killing of pathogens. Excessive NET formation has been implicated in several noninfectious pathological conditions. The disposal of NETs is, therefore, important to prevent inadvertent effects resulting from the continued presence of NETs in the extracellular environment. In this study, we investigated the interaction of NETs released by freshly isolated, PMA-stimulated primary human neutrophils with primary human monocyte-derived macrophages or dendritic cells (DCs). NETs were internalized by macrophages, and removal of the protein component prevented engulfment of NETs, whereas complexation with LL-37 restored the uptake of "naked" (protein-free) NETs. NETs were also found to dampen the bacterial LPS-induced maturation of DCs. Cytokine profiling was conducted by using a multiplex array following the interaction of NETs with macrophages or DCs, and NETs alone were found to be noninflammatory, whereas immunomodulatory effects were noted in the presence of LPS with significant upregulation of IL-1β secretion, and a marked suppression of other LPS-induced factors including vascular endothelial growth factor (VEGF) in both cell types. Moreover, macrophage digestion of NETs was dependent on TREX1 (also known as DNaseIII), but not DNaseII, whereas extracellular DNase1L3-mediated degradation of NETs was observed for DCs. Collectively, these findings shed light on the interactions between NETs and phagocytic cells and provide new insights regarding the clearance of NETs, double-edged swords of innate immunity.
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Affiliation(s)
- Beatrice Lazzaretto
- Division of Molecular Toxicology, Institute of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Bengt Fadeel
- Division of Molecular Toxicology, Institute of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
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Frangou E, Vassilopoulos D, Boletis J, Boumpas DT. An emerging role of neutrophils and NETosis in chronic inflammation and fibrosis in systemic lupus erythematosus (SLE) and ANCA-associated vasculitides (AAV): Implications for the pathogenesis and treatment. Autoimmun Rev 2019; 18:751-760. [DOI: 10.1016/j.autrev.2019.06.011] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 02/02/2019] [Indexed: 02/08/2023]
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Silvestre-Roig C, Fridlender ZG, Glogauer M, Scapini P. Neutrophil Diversity in Health and Disease. Trends Immunol 2019; 40:565-583. [PMID: 31160207 PMCID: PMC7185435 DOI: 10.1016/j.it.2019.04.012] [Citation(s) in RCA: 288] [Impact Index Per Article: 57.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/26/2019] [Accepted: 04/28/2019] [Indexed: 12/17/2022]
Abstract
New evidence has challenged the outdated dogma that neutrophils are a homogeneous population of short-lived cells. Although neutrophil subpopulations with distinct functions have been reported under homeostatic and pathological conditions, a full understanding of neutrophil heterogeneity and plasticity is currently lacking. We review here current knowledge of neutrophil heterogeneity and diversity, highlighting the need for deep genomic, phenotypic, and functional profiling of the identified neutrophil subpopulations to determine whether these cells truly represent bona fide novel neutrophil subsets. We suggest that progress in understanding neutrophil heterogeneity will allow the identification of clinically relevant neutrophil subpopulations that may be used in the diagnosis of specific diseases and lead to the development of new therapeutic approaches.
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Affiliation(s)
- Carlos Silvestre-Roig
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-University, Munich, Germany
| | - Zvi G Fridlender
- Institute of Pulmonary Medicine, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Michael Glogauer
- Faculty of Dentistry, University of Toronto, and Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Patrizia Scapini
- Department of Medicine, Section of General Pathology, School of Medicine, University of Verona, Verona, Italy.
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Rahman S, Sagar D, Hanna RN, Lightfoot YL, Mistry P, Smith CK, Manna Z, Hasni S, Siegel RM, Sanjuan MA, Kolbeck R, Kaplan MJ, Casey KA. Low-density granulocytes activate T cells and demonstrate a non-suppressive role in systemic lupus erythematosus. Ann Rheum Dis 2019; 78:957-966. [PMID: 31040119 PMCID: PMC6585283 DOI: 10.1136/annrheumdis-2018-214620] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 03/08/2019] [Accepted: 03/12/2019] [Indexed: 12/31/2022]
Abstract
OBJECTIVES The presence of proinflammatory low-density granulocytes (LDG) has been demonstrated in autoimmune and infectious diseases. Recently, regulatory neutrophilic polymorphonuclear myeloid-derived suppressor cells (PMN-MDSC) were identified in systemic lupus erythematosus (SLE). Because LDG and PMN-MDSC share a similar phenotype with contrasting functional effects, we explored these cells in a cohort of patients with SLE. METHODS LDG and normal-density granulocytes (NDG) were isolated from fresh blood of healthy donors (HD) and patients with SLE. Associations between LDG and clinical manifestations were analysed. Multicolor flow cytometry and confocal imaging were performed to immunophenotype the cells. The ability of LDG and NDG to suppress T cell function and induce cytokine production was quantified. RESULTS LDG prevalence was elevated in SLE versus HD, associated with the interferon (IFN) 21-gene signature and disease activity. Also, the LDG-to-lymphocyte ratio associated better with SLE disease activity index than neutrophil-to-lymphocyte ratio. SLE LDG exhibited significantly heightened surface expression of various activation markers and also of lectin-like oxidised low-density lipoprotein receptor-1, previously described to be associated with PMN-MDSC. Supernatants from SLE LDG did not restrict HD CD4+ T cell proliferation in an arginase-dependent manner, suggesting LDG are not immunosuppressive. SLE LDG supernatants induced proinflammatory cytokine production (IFN gamma, tumour necrosis factor alpha and lymphotoxin alpha) from CD4+ T cells. CONCLUSIONS Based on our results, SLE LDG display an activated phenotype, exert proinflammatory effects on T cells and do not exhibit MDSC function. These results support the concept that LDG represent a distinct proinflammatory subset in SLE with pathogenic potential, at least in part, through their ability to activate type 1 helper responses.
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Affiliation(s)
- Saifur Rahman
- Department of Respiratory, Inflammation and Autoimmunity, MedImmune LLC, Gaithersburg, Maryland, USA
| | - Divya Sagar
- Department of Respiratory, Inflammation and Autoimmunity, MedImmune LLC, Gaithersburg, Maryland, USA
| | - Richard N Hanna
- Department of Respiratory, Inflammation and Autoimmunity, MedImmune LLC, Gaithersburg, Maryland, USA
| | - Yaima L Lightfoot
- Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Pragnesh Mistry
- Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Carolyne K Smith
- Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Zerai Manna
- Lupus Clinical Research Program, Office of the Clinical Director, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Sarfaraz Hasni
- Lupus Clinical Research Program, Office of the Clinical Director, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Richard M Siegel
- Immunoregulation Section, Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Miguel A Sanjuan
- Department of Respiratory, Inflammation and Autoimmunity, MedImmune LLC, Gaithersburg, Maryland, USA
| | - Roland Kolbeck
- Department of Respiratory, Inflammation and Autoimmunity, MedImmune LLC, Gaithersburg, Maryland, USA
| | - Mariana J Kaplan
- Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Kerry A Casey
- Department of Respiratory, Inflammation and Autoimmunity, MedImmune LLC, Gaithersburg, Maryland, USA
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van Dam LS, Rabelink TJ, van Kooten C, Teng YKO. Clinical Implications of Excessive Neutrophil Extracellular Trap Formation in Renal Autoimmune Diseases. Kidney Int Rep 2018; 4:196-211. [PMID: 30775617 PMCID: PMC6365354 DOI: 10.1016/j.ekir.2018.11.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 11/02/2018] [Accepted: 11/12/2018] [Indexed: 12/20/2022] Open
Abstract
Neutrophil extracellular traps (NETs) are extracellular DNA structures covered with antimicrobial peptides, danger molecules, and autoantigens that can be released by neutrophils. NETs are an important first-line defense mechanism against bacterial, viral, fungal, and parasitic infections, but they can also play a role in autoimmune diseases. NETs are immunogenic and toxic structures that are recognized by the autoantibodies of patients with antineutrophil cytoplasmic antibodies−associated vasculitis (AAV) (i.e., against myeloperoxidase or proteinase-3) and systemic lupus erythematosus (SLE) (i.e., against double-stranded DNA, histones, or nucleosomes). There is cumulating preclinical and clinical evidence that both excessive formation and impaired degradation of NETs are involved in the pathophysiology of AAV and SLE. These autoimmune diseases give rise to 2 clinically and pathologically distinct forms of glomerulonephritis (GN), respectively, crescentic pauci-immune GN and immune complex−mediated GN. Therefore, it is relevant to understand the different roles NET formation can play in the pathophysiology of these most prevalent renal autoimmune diseases. This review summarizes the current concepts on the role of NET formation in the pathophysiology of AAV and SLE, and provides a translational perspective on the clinical implications of NETs, such as potential therapeutic approaches that target NET formation in these renal autoimmune diseases.
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Affiliation(s)
- Laura S van Dam
- Department of Nephrology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Ton J Rabelink
- Department of Nephrology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Cees van Kooten
- Department of Nephrology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Y K Onno Teng
- Department of Nephrology, Leiden University Medical Centre, Leiden, The Netherlands
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28
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Affiliation(s)
- Yi He
- Department of Rheumatology and Immunology, The Third Affiliated Hospital, Southern Medical University; Institute of Clinical Immunology, Academy of Orthopedics, Guangdong Province, Guangzhou, Guangdong 510630, China
| | - Fang-Yuan Yang
- Southern Medical University, Guangzhou, Guangdong 510630, China
| | - Er-Wei Sun
- Department of Rheumatology and Immunology, The Third Affiliated Hospital, Southern Medical University; Institute of Clinical Immunology, Academy of Orthopedics, Guangdong Province, Guangzhou, Guangdong 510630, China
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