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Akai N, Hashimoto T, Okuzawa M, Okuno S, Satoh T. Lesional Infiltration of Eosinophils, Basophils, and M2 Macrophages Expressing Eotaxin-1 and Eotaxin-3 in Granuloma Faciale, but not in Erythema Elevatum Diutinum. Acta Derm Venereol 2024; 104:adv35401. [PMID: 38348729 PMCID: PMC10875518 DOI: 10.2340/actadv.v104.35401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 01/22/2024] [Indexed: 02/15/2024] Open
Abstract
Abstract is missing (Short communication)
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Affiliation(s)
- Nozomi Akai
- Department of Dermatology, National Defense Medical College, Tokorozawa, Japan
| | - Takashi Hashimoto
- Department of Dermatology, National Defense Medical College, Tokorozawa, Japan.
| | - Manami Okuzawa
- Department of Dermatology, National Defense Medical College, Tokorozawa, Japan
| | - Satoshi Okuno
- Department of Dermatology, National Defense Medical College, Tokorozawa, Japan
| | - Takahiro Satoh
- Department of Dermatology, National Defense Medical College, Tokorozawa, Japan
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Wei JY, Hu MY, Chen XQ, Wei JS, Chen J, Qin XK, Lei FY, Zou JS, Zhu SQ, Qin YH. Hypobaric Hypoxia Aggravates Renal Injury by Inducing the Formation of Neutrophil Extracellular Traps through the NF-κB Signaling Pathway. Curr Med Sci 2023:10.1007/s11596-023-2744-3. [PMID: 37264195 DOI: 10.1007/s11596-023-2744-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 11/24/2022] [Indexed: 06/03/2023]
Abstract
OBJECTIVE The hypersensitivity of the kidney makes it susceptible to hypoxia injury. The involvement of neutrophil extracellular traps (NETs) in renal injury resulting from hypobaric hypoxia (HH) has not been reported. In this study, we aimed to investigate the expression of NETs in renal injury induced by HH and the possible underlying mechanism. METHODS A total of 24 SD male rats were divided into three groups (n=8 each): normal control group, hypoxia group and hypoxia+pyrrolidine dithiocarbamate (PDTC) group. Rats in hypoxia group and hypoxia+PDTC group were placed in animal chambers with HH which was caused by simulating the altitude at 7000 meters (oxygen partial pressure about 6.9 kPa) for 7 days. PDTC was administered at a dose of 100 mg/kg intraperitoneally once daily for 7 days. Pathological changes of the rat renal tissues were observed under a light microscope; the levels of serum creatinine (SCr), blood urea nitrogen (BUN), cell-free DNA (cf-DNA) and reactive oxygen species (ROS) were measured; the expression levels of myeloperoxidase (MPO), citrullinated histone H3 (cit-H3), B-cell lymphoma 2 (Bcl-2), Bax, nuclear factor kappa B (NF-κB) p65 and phospho-NF-κB p65 (p-NF-κB p65) in rat renal tissues were detected by qRT-qPCR and Western blotting; the localization of NF-κB p65 expression in rat renal tissues was observed by immunofluorescence staining and the expression changes of NETs in rat renal tissues were detected by multiplex fluorescence immunohistochemical staining. RESULTS After hypoxia, the expression of NF-κB protein in renal tissues was significantly increased, the levels of SCr, BUN, cf-DNA and ROS in serum were significantly increased, the formation of NETs in renal tissues was significantly increased, and a large number of tubular dilatation and lymphocyte infiltration were observed in renal tissues. When PDTC was used to inhibit NF-κB activation, NETs formation in renal tissue was significantly decreased, the expression level of Bcl-2 in renal tissues was significantly increased, the expression level of Bax was significantly decreased, and renal injury was significantly alleviated. CONCLUSION HH induces the formation of NETs through the NF-κB signaling pathway, and it promotes apoptosis and aggravates renal injury by decreasing Bcl-2 and increasing Bax expression.
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Affiliation(s)
- Jun-Yu Wei
- Department of Pediatrics, the First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, China
| | - Miao-Yue Hu
- Department of Pediatrics, the First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, China
| | - Xiu-Qi Chen
- Department of Pediatrics, the First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, China
| | - Jin-Shuang Wei
- Department of Pediatrics, the First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, China
| | - Jie Chen
- Department of Pediatrics, the First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, China
| | - Xuan-Kai Qin
- Department of Pediatrics, the First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, China
| | - Feng-Ying Lei
- Department of Pediatrics, the First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, China
| | - Jia-Sen Zou
- Children's Hospital of Chongqing Medical University, Chongqing, 400015, China
| | - Shi-Qun Zhu
- Shenzhen Children's Hospital, Shenzhen, 518034, China
| | - Yuan-Han Qin
- Department of Pediatrics, the First Affiliated Hospital, Guangxi Medical University, Nanning, 530021, China.
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Establishment of a humanized animal model of systemic sclerosis in which T helper-17 cells from patients with systemic sclerosis infiltrate and cause fibrosis in the lungs and skin. EXPERIMENTAL & MOLECULAR MEDICINE 2022; 54:1577-1585. [PMID: 36175484 PMCID: PMC9534900 DOI: 10.1038/s12276-022-00860-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 07/05/2022] [Accepted: 07/25/2022] [Indexed: 11/30/2022]
Abstract
Systemic sclerosis (SSc) is a chronic autoimmune disease characterized by inflammation, microangiopathy, and progressive fibrosis in the skin and internal organs. To evaluate the pathophysiologic mechanisms and efficacies of potential therapeutics for SSc, a preclinical model recapitulating the disease phenotypes is needed. Here, we introduce a novel animal model for SSc using immunodeficient mice injected with peripheral blood mononuclear cells (PBMCs) from SSc patients. Human PBMCs acquired from SSc patients and healthy controls were transferred into NOD.Cg-PrkdcscidIl2rgtm1Wjl (NSG) mice with concurrent bleomycin injection. Blood, skin, and lung tissues were acquired and analyzed after PBMC engraftment. In addition, we investigated whether the humanized murine model could be used to assess the efficacy of potential therapeutics for SSc. Human PBMCs from SSc patients and healthy controls were engrafted into the blood, skin, and lung tissues of NSG mice. Histological analysis of affected tissues from mice treated with SSc PBMCs (SSc hu-mice) demonstrated substantial inflammation, fibrosis and vasculopathy with human immune cell infiltration and increased expression of IL-17, TGF-β, CCL2, CCL3, and CXCL9. The proportions of circulating and tissue-infiltrating T helper 17 (Th17) cells were elevated in SSc hu-mice. These cells showed increased expression of CXCR3 and phosphorylated STAT3. SSc hu-mice treated with rebamipide and other potential Th17-cell-modulating drugs presented significantly reduced tissue fibrosis. Mice injected with patient-derived PBMCs show promise as an animal model of SSc. A humanized mouse model of the autoimmune disease systemic sclerosis (SSc) could improve understanding of disease progression and provide a trial platform for potential treatments. SSc results in inflammation and progressive fibrosis in the skin, heart, lungs and kidneys. Existing animal models for SSc are unable to fully mimic the mechanisms behind the disease. Mi-La Cho and Sung-Hwan Park at the Catholic University of Korea, Seoul, South Korea, and co-workers injected peripheral blood cells from patients with SSc into immune-deficent mice, generating a humanized animal model. Several weeks after, the team analysed blood and tissue samples from the mice and found significant inflammation and fibrosis in the skin and lungs, consistent with SSc. Levels of proinflammatory proteins and specific human T-helper cells were significantly elevated, providing possible insights into disease initiation and progression.
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Yang S, Zou X, Li J, Yang H, Zhang A, Zhu Y, Zhu L, Zhang L. Immunoregulation and clinical significance of neutrophils/NETs-ANGPT2 in tumor microenvironment of gastric cancer. Front Immunol 2022; 13:1010434. [PMID: 36172371 PMCID: PMC9512293 DOI: 10.3389/fimmu.2022.1010434] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 08/24/2022] [Indexed: 11/13/2022] Open
Abstract
Although significant progress has been made in the study of gastric cancer (GC), clinicians lack reliable protein markers for accurate diagnosis and tumor stratification. Neutrophil extracellular traps (NETs) are networks of extracellular fibers composed of DNA from neutrophils. We have previously reported that abundant NETs are deposited in GC, damaging human umbilical vein endothelial cells (HUVECs) and triggering the release of tissue factors, leading to a hypercoagulable state in GC. However, the specific effects of NETs on HUVECs are unclear. We aimed to explore the functional changes caused by NETs on HUVECs, providing evidence that NETs may fuel GC progression. Through quantitative proteomics, we identified 6182 differentially expressed proteins in NET-stimulated HUVECs by TMT. The reliability of the TMT technique was confirmed by parallel reaction monitoring (PRM) analysis of 17 differentially expressed proteins. Through bioinformatics analysis, we found that NETs upregulate ANGPT2 in HUVECs. We comprehensively analyzed the prognosis, biological function, immune response, and therapeutic value of ANGPT2 in GC. We found that overexpression of ANGPT2 in GC is associated with poor prognosis and potentially regulates multiple biological functions. At the same time, ANGPT2 also predicted immunotherapeutic and chemotherapeutic responses in GC. In conclusion, NETs promoted ANGPT2 overexpression in the GC microenvironment. In the future, the neutrophil/NETs-ANGPT2 axis may provide a new target for the treatment of GC.
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Affiliation(s)
- Shifeng Yang
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
- The Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin, China
| | - Xiaoming Zou
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
- *Correspondence: Xiaoming Zou, ; Jiacheng Li,
| | - Jiacheng Li
- Department of General Surgery, The First Affiliated Hospital of Jiamusi University, Jiamusi, China
- *Correspondence: Xiaoming Zou, ; Jiacheng Li,
| | - Hao Yang
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Ange Zhang
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
- The Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin, China
| | - Yanli Zhu
- Key laboratory of Microecology-immune Regulatory Network and Related Diseases School of Basic Medicine, Jiamusi University, Jiamusi, China
| | - Lei Zhu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Lisha Zhang
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
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Chen XQ, Tu L, Tang Q, Huang L, Qin YH. An Emerging Role for Neutrophil Extracellular Traps in IgA Vasculitis: A Mini-Review. Front Immunol 2022; 13:912929. [PMID: 35799774 PMCID: PMC9253285 DOI: 10.3389/fimmu.2022.912929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 05/26/2022] [Indexed: 11/13/2022] Open
Abstract
Immunoglobulin A vasculitis (IgAV) is the most common systemic small vessel vasculitis in childhood. Its clinical manifestations are non-thrombocytopenic purpura, accompanied by gastrointestinal tract, joint, kidney and other organ system involvement. The pathogenesis of IgAV has not been fully elucidated. It may be related to many factors including genetics, infection, environmental factors, and drugs. The most commonly accepted view is that galactose-deficient IgA1 and the deposition of IgA and complement C3 in small blood vessel walls are key contributors to the IgAV pathogenesis. Extensive neutrophil extracellular traps (NETs) in the peripheral circulation and skin, kidney, and gastrointestinal tissue of patients with IgAV has been identified in the past two years and is associated with disease activity. This mini-review provides a possible mechanism for NETs involvement in the pathogenesis of IgAV.
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Song Y, Huang X, Yu G, Qiao J, Cheng J, Wu J, Chen J. Pathogenesis of IgA Vasculitis: An Up-To-Date Review. Front Immunol 2021; 12:771619. [PMID: 34858429 PMCID: PMC8630619 DOI: 10.3389/fimmu.2021.771619] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 10/21/2021] [Indexed: 11/13/2022] Open
Abstract
Immunoglobin A (IgA) vasculitis (IgAV), formerly called the Henoch-Schönlein purpura (HSP), is a small vessel vasculitis, characterized by IgA1-dominant immune deposition at diseased vessel walls. IgAV is the most common form of vasculitis in children; typical symptoms include palpable purpura, arthritis or arthralgia, abdominal pain, and hematuria or proteinuria. Galactose-deficient IgA1 is detected in the tissues of the kidney and skin in patients with IgAV; it forms immune complexes leading to subsequent immune reactions and injuries. This report provides the recent advances in the understanding of environmental factors, genetics, abnormal innate and acquired immunity, and the role of galactose-deficient IgA1 immunocomplexes in the pathogenesis of IgAV.
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Affiliation(s)
- Yan Song
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, China.,National Key Clinical Department of Kidney Diseases, Hangzhou, China.,Institute of Nephrology, Zhejiang University, Hangzhou, China.,The Third Grade Laboratory Under the National State, Administration of Traditional Chinese Medicine, Hangzhou, China
| | - Xiaohan Huang
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, China.,National Key Clinical Department of Kidney Diseases, Hangzhou, China.,Institute of Nephrology, Zhejiang University, Hangzhou, China.,The Third Grade Laboratory Under the National State, Administration of Traditional Chinese Medicine, Hangzhou, China
| | - Guizhen Yu
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, China.,National Key Clinical Department of Kidney Diseases, Hangzhou, China.,Institute of Nephrology, Zhejiang University, Hangzhou, China.,The Third Grade Laboratory Under the National State, Administration of Traditional Chinese Medicine, Hangzhou, China
| | - Jianjun Qiao
- Department of Dermatology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Jun Cheng
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, China.,National Key Clinical Department of Kidney Diseases, Hangzhou, China.,Institute of Nephrology, Zhejiang University, Hangzhou, China.,The Third Grade Laboratory Under the National State, Administration of Traditional Chinese Medicine, Hangzhou, China
| | - Jianyong Wu
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, China.,National Key Clinical Department of Kidney Diseases, Hangzhou, China.,Institute of Nephrology, Zhejiang University, Hangzhou, China.,The Third Grade Laboratory Under the National State, Administration of Traditional Chinese Medicine, Hangzhou, China
| | - Jianghua Chen
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Key Laboratory of Kidney Disease Prevention and Control Technology, Hangzhou, China.,National Key Clinical Department of Kidney Diseases, Hangzhou, China.,Institute of Nephrology, Zhejiang University, Hangzhou, China.,The Third Grade Laboratory Under the National State, Administration of Traditional Chinese Medicine, Hangzhou, China
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Nakai K, Tsuruta D. What Are Reactive Oxygen Species, Free Radicals, and Oxidative Stress in Skin Diseases? Int J Mol Sci 2021; 22:ijms221910799. [PMID: 34639139 PMCID: PMC8509443 DOI: 10.3390/ijms221910799] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 09/28/2021] [Accepted: 09/28/2021] [Indexed: 01/20/2023] Open
Abstract
Oxygen in the atmosphere is a crucial component for life-sustaining aerobic respiration in humans. Approximately 95% of oxygen is consumed as energy and ultimately becomes water; however, the remaining 5% produces metabolites called activated oxygen or reactive oxygen species (ROS), which are extremely reactive. Skin, the largest organ in the human body, is exposed to air pollutants, including diesel exhaust fumes, ultraviolet rays, food, xenobiotics, drugs, and cosmetics, which promote the production of ROS. ROS exacerbate skin aging and inflammation, but also function as regulators of homeostasis in the human body, including epidermal keratinocyte proliferation. Although ROS have been implicated in various skin diseases, the underlying mechanisms have not yet been elucidated. Current knowledge on ROS-related and oxidative stress-related skin diseases from basic research to clinical treatment strategies are discussed herein. This information may be applied to the future treatment of skin diseases through the individual targeting of the ROS generated in each case via their inhibition, capture, or regulation.
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Affiliation(s)
- Kozo Nakai
- Correspondence: ; Tel.: +81-6-6645-3826; Fax: +81-6-6645-3828
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Chen XQ, Tu L, Zou JS, Zhu SQ, Zhao YJ, Qin YH. The Involvement of Neutrophil Extracellular Traps in Disease Activity Associated With IgA Vasculitis. Front Immunol 2021; 12:668974. [PMID: 34539623 PMCID: PMC8446352 DOI: 10.3389/fimmu.2021.668974] [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: 02/17/2021] [Accepted: 08/16/2021] [Indexed: 11/13/2022] Open
Abstract
Objectives This aim of this study was to determine whether neutrophil extracellular traps (NETs) are involved in the pathogenesis of IgA vasculitis (IgAV) and investigate whether the circulating NETs levels are associated with disease activity in children. Methods We performed a case-control study and collected blood samples from 193 children with different stages of IgAV (61 were at the onset stage, 64 at the remission stage, 43 at the active stage, and 25 were undergoing drug withdrawal). A total of 192 healthy children were recruited as controls. Circulating cell free DNA (cf-DNA) was obtained from the plasma and quantified by using the Quant-iT PicoGreen DNA quantification kit. NETs-associated myeloperoxidase-DNA (MPO-DNA), citrullinated-histone H3 (cit-H3), neutrophil elastase (NE), and the deoxyribonuclease I (DNase I) concentrations were measured using enzyme-linked immunosorbent assays. The presence of NETs in the kidney and gastrointestinal tissues of onset and active IgAV patients was determined by multiple immunofluorescence staining in 15 IgAV nephritis patients and 9 IgAV patients without IgAV nephritis, respectively. NETs degradation potency of collected sera samples from IgAV patients were checked in vitro. Relationships between circulating levels of cf-DNA with MPO-DNA, NE, and DNase I and the patients were analyzed. Results Circulating levels of cf-DNA in onset and active IgAV patients were significantly higher than those in remission and drug withdrawal patients as well as healthy controls. The results were similar for MPO-DNA and NE. The levels of circulating cf-DNA correlated significantly with MPO-DNA, NE and DNase I. A significantly decreased degradation of NETs from the onset and active IgAV patients was observed, but was normal in healthy controls. Furthermore, presence of NETs was also confirmed in all renal and gastrointestinal tissues obtained from the onset and active IgAV patients but not control samples. Conclusions Our data showed that NETs were released into the circulation of IgAV patients and are involved in the disease activity. The circulating levels of NETs maybe used to assess disease severity in children with IgAV.
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Affiliation(s)
- Xiu-Qi Chen
- Department of Pediatrics, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Li Tu
- Department of Pediatrics, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Jia-Sen Zou
- Department of Pediatrics, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Shi-Qun Zhu
- Department of Pediatrics, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Yan-Jun Zhao
- Department of Pediatrics, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Yuan-Han Qin
- Department of Pediatrics, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
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Fetz AE, Radic MZ, Bowlin GL. Human neutrophil FcγRIIIb regulates neutrophil extracellular trap release in response to electrospun polydioxanone biomaterials. Acta Biomater 2021; 130:281-290. [PMID: 34116225 PMCID: PMC8316391 DOI: 10.1016/j.actbio.2021.06.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/28/2021] [Accepted: 06/01/2021] [Indexed: 12/12/2022]
Abstract
During the acute inflammatory response, the release of neutrophil extracellular traps (NETs) is a pro-inflammatory, preconditioning event on a biomaterial surface. Therefore, regulation of NET release through biomaterial design is one strategy to enhance biomaterial-guided in situ tissue regeneration. In this study, IgG adsorption on electrospun polydioxanone biomaterials with differing fiber sizes was explored as a regulator of in vitro human neutrophil NET release. The propensity to release NETs was increased and decreased by modulating adsorbed IgG, suggesting a functional link between IgG and NET formation. Fiber-size dependent NET release was reduced by blocking FcγRIIIb, but not FcγRI, FcγRIIa, or Mac-1 (CD11b/CD18), indicating a specific receptor mediated neutrophil response. Inhibition of transforming growth factor-β-activated kinase 1 (TAK1), which is activated downstream of FcγRIIIb, significantly reduced the release of NETs in a fiber size-independent manner. These results indicate that in vitro electrospun biomaterial-induced NET release is largely regulated by IgG adsorption, engagement of FcγRIIIb, and signaling through TAK1. Modulation of this pathway may have beneficial therapeutic effects for regulating neutrophil-mediated inflammation by avoiding the adverse effects of NETs and increasing the potential for in situ tissue regeneration. STATEMENT OF SIGNIFICANCE: Electrospun biomaterials have great potential for in situ tissue engineering because of their versatility and biomimetic properties. However, understanding how to design the biomaterial to regulate acute inflammation, dominated by neutrophils, remains a great challenge for successful tissue integration and regeneration. In this work, we demonstrate for the first time how protein adsorption on the biomaterial surface and engagement of a specific neutrophil receptor induces intracellular signals that regulate the pro-inflammatory release of neutrophil extracellular traps (NETs). Given the deleterious effects of NETs during the acute inflammatory response to a biomaterial, our work highlights the importance of considering biomaterial-neutrophil interactions on degradable and non-degradable biomaterials to achieve the desired biological outcome.
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Affiliation(s)
- Allison E Fetz
- Department of Biomedical Engineering, University of Memphis, 3806 Norriswood Avenue, Memphis, TN, USA
| | - Marko Z Radic
- Department of Microbiology, Immunology, and Biochemistry, College of Medicine, University of Tennessee Health Science Center, 858 Madison Avenue, Memphis, TN, USA
| | - Gary L Bowlin
- Department of Biomedical Engineering, University of Memphis, 3806 Norriswood Avenue, Memphis, TN, USA.
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Michailidou D, Mustelin T, Lood C. Role of Neutrophils in Systemic Vasculitides. Front Immunol 2020; 11:619705. [PMID: 33391289 PMCID: PMC7774018 DOI: 10.3389/fimmu.2020.619705] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 11/18/2020] [Indexed: 12/20/2022] Open
Abstract
Neutrophils and neutrophil extracellular traps (NETs) contribute to the pathogenesis of many autoimmune diseases, including vasculitis. Though neutrophils, and NETs, can break self-tolerance by being a source of autoantigens for autoantibodies in anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis, playing a key role in driving the autoimmune response, the role of neutrophils and NETs in large vessel vasculitis, including giant cell arteritis (GCA), is not well understood. In this review, we summarize the current insight into molecular mechanisms contributing to neutrophil-mediated pathology in small and medium vessel vasculitis, as well as provide potential translational perspectives on how neutrophils, and NETs, may partake in large vessel vasculitis, a rare disease entity of unclear pathogenesis.
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Affiliation(s)
- Despina Michailidou
- Division of Rheumatology, University of Washington, Seattle, WA, United States
| | - Tomas Mustelin
- Division of Rheumatology, University of Washington, Seattle, WA, United States
| | - Christian Lood
- Division of Rheumatology, University of Washington, Seattle, WA, United States
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