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Sugita K, Kabashima K. Tight junctions in the development of asthma, chronic rhinosinusitis, atopic dermatitis, eosinophilic esophagitis, and inflammatory bowel diseases. J Leukoc Biol 2020; 107:749-762. [PMID: 32108379 DOI: 10.1002/jlb.5mr0120-230r] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 01/12/2020] [Accepted: 01/26/2020] [Indexed: 02/06/2023] Open
Abstract
This review focuses on recent developments related to asthma, chronic rhinosinusitis, atopic dermatitis (AD), eosinophilic esophagitis, and inflammatory bowel diseases (IBD), with a particular focus on tight junctions (TJs) and their role in the pathogenetic mechanisms of these diseases. Lung, skin, and intestinal surfaces are lined by epithelial cells that interact with environmental factors and immune cells. Therefore, together with the cellular immune system, the epithelium performs a pivotal role as the first line physical barrier against external antigens. Paracellular space is almost exclusively sealed by TJs and is maintained by complex protein-protein interactions. Thus, TJ dysfunction increases paracellular permeability, resulting in enhanced flux across TJs. Epithelial TJ dysfunction also causes immune cell activation and contributes to the pathogenesis of chronic lung, skin, and intestinal inflammation. Characterization of TJ protein alteration is one of the key factors for enhancing our understanding of allergic diseases as well as IBDs. Furthermore, TJ-based epithelial disturbance can promote immune cell behaviors, such as those in dendritic cells, Th2 cells, Th17 cells, and innate lymphoid cells (ILCs), thereby offering new insights into TJ-based targets. The purpose of this review is to illustrate how TJ dysfunction can lead to the disruption of the immune homeostasis in barrier tissues and subsequent inflammation. This review also highlights the various TJ barrier dysfunctions across different organ sites, which would help to develop future drugs to target allergic diseases and IBD.
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Affiliation(s)
- Kazunari Sugita
- Division of Dermatology, Department of Medicine of Sensory and Motor Organs, Tottori University Faculty of Medicine, Yonago, Japan
| | - Kenji Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
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152
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Gern JE, Lee WM, Swenson CA, Nakagome K, Lee I, Wolff M, Grindle K, Sigelman S, Liggett SB, Togias A, Evans M, Denlinger L, Gangnon R, Bochkov YA, Crisafi G. Development of a Rhinovirus Inoculum Using a Reverse Genetics Approach. J Infect Dis 2020; 220:187-194. [PMID: 30383246 PMCID: PMC6581892 DOI: 10.1093/infdis/jiy629] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 10/31/2018] [Indexed: 11/12/2022] Open
Abstract
Background Experimental inoculation is an important tool for common cold and asthma research. Producing rhinovirus (RV) inocula from nasal secretions has required prolonged observation of the virus donor to exclude extraneous pathogens. We produced a RV-A16 inoculum using reverse genetics and determined the dose necessary to cause moderate colds in seronegative volunteers. Methods The consensus sequence of RV-A16 from a previous inoculum was cloned, and inoculum virus was produced using reverse genetics techniques. After safety testing, volunteers were inoculated with either RV-A16 (n = 26) or placebo (n = 10), Jackson cold scores were recorded, and nasal secretions were tested for shedding of RV-A16 ribonucleic acid. Results The reverse genetics process produced infectious virus that was neutralized by specific antisera and had a mutation rate similar to conventional virus growth techniques. The 1000 median tissue culture infectious dose (TCID50) dose produced moderate colds in most individuals with effects similar to that of a previously tested conventional RV-A16 inoculum. Conclusions Reverse genetics techniques produced a RV-A16 inoculum that can cause clinical colds in seronegative volunteers, and they also serve as a stable source of virus for laboratory use. The recombinant production procedures eliminate the need to derive seed virus from nasal secretions, thus precluding introduction of extraneous pathogens through this route.
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Affiliation(s)
| | | | | | | | - Iris Lee
- Departments of Pediatrics and Medicine
| | | | | | - Steven Sigelman
- Division of Allergy, Immunology and Transplantation, National Institute of Allergy and Infectious Disease, National Institutes of Health, Rockford, MD
| | - Stephen B Liggett
- Department of Internal Medicine and Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa FL
| | - Alkis Togias
- Division of Allergy, Immunology and Transplantation, National Institute of Allergy and Infectious Disease, National Institutes of Health, Rockford, MD
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153
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Han Y, Chen L, Liu H, Jin Z, Wu Y, Wu Y, Li W, Ying S, Chen Z, Shen H, Yan F. Airway Epithelial cGAS Is Critical for Induction of Experimental Allergic Airway Inflammation. THE JOURNAL OF IMMUNOLOGY 2020; 204:1437-1447. [PMID: 32034061 DOI: 10.4049/jimmunol.1900869] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 01/06/2020] [Indexed: 12/17/2022]
Abstract
DNA damage could lead to the accumulation of cytosolic DNA, and the cytosolic DNA-sensing pathway has been implicated in multiple inflammatory diseases. However, the role of cytosolic DNA-sensing pathway in asthma pathogenesis is still unclear. This article explored the role of airway epithelial cyclic GMP-AMP synthase (cGAS), the major sensor of cytosolic dsDNA, in asthma pathogenesis. Cytosolic dsDNA accumulation in airway epithelial cells (ECs) was detected in the setting of allergic inflammation both in vitro and in vivo. Mice with cGAS deletion in airway ECs were used for OVA- or house dust mite (HDM)-induced allergic airway inflammation. Additionally, the effects of cGAS knockdown on IL-33-induced GM-CSF production and the mechanisms by which IL-33 induced cytosolic dsDNA accumulation in human bronchial epithelial (HBE) cells were explored. Increased accumulation of cytosolic dsDNA was observed in airway epithelium of OVA- or HDM-challenged mice and in HBE cells treated with IL-33. Deletion of cGAS in the airway ECs of mice significantly attenuated the allergic airway inflammation induced by OVA or HDM. Mechanistically, cGAS participates in promoting TH2 immunity likely via regulating the production of airway epithelial GM-CSF. Furthermore, Mito-TEMPO could reduce IL-33-induced cytoplasmic dsDNA accumulation in HBE cells possibly through suppressing the release of mitochondrial DNA into the cytosol. In conclusion, airway epithelial cGAS plays an important role via sensing the cytosolic dsDNA in asthma pathogenesis and could serve as a promising therapeutic target against allergic airway inflammation.
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Affiliation(s)
- Yinling Han
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; and
| | - Lin Chen
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; and
| | - Huiwen Liu
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; and
| | - Zhangchu Jin
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; and
| | - Yinfang Wu
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; and
| | - Yanping Wu
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; and
| | - Wen Li
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; and
| | - Songmin Ying
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; and
| | - Zhihua Chen
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; and
| | - Huahao Shen
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; and .,State Key Lab of Respiratory Disease, Guangzhou, Guangdong 510120, China
| | - Fugui Yan
- Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China; and
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154
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Imanishi T, Saito T. T Cell Co-stimulation and Functional Modulation by Innate Signals. Trends Immunol 2020; 41:200-212. [PMID: 32035763 DOI: 10.1016/j.it.2020.01.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 01/10/2020] [Accepted: 01/10/2020] [Indexed: 12/22/2022]
Abstract
Pattern recognition receptors (PRRs), such as Toll-like receptors (TLRs), NOD-like receptors (NLRs), and RIG-I-like receptors (RLRs), play a pivotal role in the initiation of innate immune responses. Certain PRRs are also expressed by CD4+ and CD8+ T cells, where they function to provide co-stimulatory signals for their activation and differentiation. Recently, stimulator of interferon genes (STING) was found to be highly expressed in CD4+ and CD8+ T cells and to modulate T cell function. STING signaling inhibits cell growth and stimulates type I interferon (IFN-I) responses in T cells through reciprocal regulation between T cell receptor (TCR) and STING signals. Here, we propose a model whereby innate signals by TLRs and STING regulate TCR signals and T cell functions.
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Affiliation(s)
- Takayuki Imanishi
- Laboratory for Cell Signaling, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Kanagawa 230-0045, Japan.
| | - Takashi Saito
- Laboratory for Cell Signaling, RIKEN Center for Integrative Medical Sciences (IMS), Yokohama, Kanagawa 230-0045, Japan; Laboratory for Cell Signaling, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan.
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155
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Casanova V, Sousa FH, Shakamuri P, Svoboda P, Buch C, D'Acremont M, Christophorou MA, Pohl J, Stevens C, Barlow PG. Citrullination Alters the Antiviral and Immunomodulatory Activities of the Human Cathelicidin LL-37 During Rhinovirus Infection. Front Immunol 2020; 11:85. [PMID: 32117246 PMCID: PMC7010803 DOI: 10.3389/fimmu.2020.00085] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 01/13/2020] [Indexed: 12/22/2022] Open
Abstract
Human rhinoviruses (HRV) are the most common cause of viral respiratory tract infections. While normally mild and self-limiting in healthy adults, HRV infections are associated with bronchiolitis in infants, pneumonia in immunocompromised patients, and exacerbations of asthma and COPD. The human cathelicidin LL-37 is a host defense peptide (HDP) with broad immunomodulatory and antimicrobial activities that has direct antiviral effects against HRV. However, LL-37 is known to be susceptible to the enzymatic activity of peptidyl arginine deiminases (PAD), and exposure of the peptide to these enzymes results in the conversion of positively charged arginines to neutral citrullines (citrullination). Here, we demonstrate that citrullination of LL-37 reduced its direct antiviral activity against HRV. Furthermore, while the anti-rhinovirus activity of LL-37 results in dampened epithelial cell inflammatory responses, citrullination of the peptide, and a loss in antiviral activity, ameliorates this effect. This study also demonstrates that HRV infection upregulates PAD2 protein expression, and increases levels of protein citrullination, including histone H3, in human bronchial epithelial cells. Increased PADI gene expression and HDP citrullination during infection may represent a novel viral evasion mechanism, likely applicable to a wide range of pathogens, and should therefore be considered in the design of therapeutic peptide derivatives.
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Affiliation(s)
- Víctor Casanova
- School of Applied Sciences, Edinburgh Napier University, Edinburgh, United Kingdom
| | | | - Priyanka Shakamuri
- Biotechnology Core Facility Branch, Division of Scientific Resources, US Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Pavel Svoboda
- Biotechnology Core Facility Branch, Division of Scientific Resources, US Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Chloé Buch
- School of Applied Sciences, Edinburgh Napier University, Edinburgh, United Kingdom
| | - Mathilde D'Acremont
- School of Applied Sciences, Edinburgh Napier University, Edinburgh, United Kingdom
| | - Maria A Christophorou
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, Western General Hospital, University of Edinburgh, Edinburgh, United Kingdom
| | - Jan Pohl
- Biotechnology Core Facility Branch, Division of Scientific Resources, US Centers for Disease Control and Prevention, Atlanta, GA, United States
| | - Craig Stevens
- School of Applied Sciences, Edinburgh Napier University, Edinburgh, United Kingdom
| | - Peter G Barlow
- School of Applied Sciences, Edinburgh Napier University, Edinburgh, United Kingdom
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156
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Neutrophil Adaptations upon Recruitment to the Lung: New Concepts and Implications for Homeostasis and Disease. Int J Mol Sci 2020; 21:ijms21030851. [PMID: 32013006 PMCID: PMC7038180 DOI: 10.3390/ijms21030851] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 01/24/2020] [Accepted: 01/27/2020] [Indexed: 12/14/2022] Open
Abstract
Neutrophils have a prominent role in all human immune responses against any type of pathogen or stimulus. The lungs are a major neutrophil reservoir and neutrophilic inflammation is a primary response to both infectious and non-infectious challenges. While neutrophils are well known for their essential role in clearance of bacteria, they are also equipped with specific mechanisms to counter viruses and fungi. When these defense mechanisms become aberrantly activated in the absence of infection, this commonly results in debilitating chronic lung inflammation. Clearance of bacteria by phagocytosis is the hallmark role of neutrophils and has been studied extensively. New studies on neutrophil biology have revealed that this leukocyte subset is highly adaptable and fulfills diverse roles. Of special interest is how these adaptations can impact the outcome of an immune response in the lungs due to their potent capacity for clearing infection and causing damage to host tissue. The adaptability of neutrophils and their propensity to influence the outcome of immune responses implicates them as a much-needed target of future immunomodulatory therapies. This review highlights the recent advances elucidating the mechanisms of neutrophilic inflammation, with a focus on the lung environment due to the immense and growing public health burden of chronic lung diseases such as cystic fibrosis (CF) and chronic obstructive pulmonary disease (COPD), and acute lung inflammatory diseases such as transfusion-related acute lung injury (TRALI).
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Abstract
PURPOSE OF REVIEW Recent advances in both murine models and clinical research of neutrophilic asthma are improving our understanding on the etiology and pathophysiology of this enigmatic endotype of asthma. We here aim at providing an overview of our current and latest insights on the pathophysiology and treatment of neutrophilic asthma. RECENT FINDINGS Activation of the NLRP3 inflammasome pathway with increased IL-1β has been demonstrated in various studies involving patients with asthma. It has been suggested that type 3 innate lymphoid cells are implicated in the inflammatory cascade leading to neutrophilic inflammation. The role of neutrophil extracellular traps is only at the start of being understood and might be an attractive novel therapeutic target. A diverse panel of nonallergic stimuli, such as cigarette smoke, intensive exercise, cold air or saturated fatty acids, have been linked with neutrophilic airway inflammation. Azithromycin treatment could reduce asthma exacerbations and quality of life in patients with persistent asthma. SUMMARY Research of the last few years has accelerated our insights in mechanisms underlying neutrophilic asthma. This is in stark contrast with the lack of efficacy of different therapies targeting neutrophil chemotaxis and/or signalling cascade, such as IL-17A or CXCR2. Macrolide therapy might be a useful add-on therapy for patients with persistent asthma.
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158
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Kirsebom F, Michalaki C, Agueda-Oyarzabal M, Johansson C. Neutrophils do not impact viral load or the peak of disease severity during RSV infection. Sci Rep 2020; 10:1110. [PMID: 31980667 PMCID: PMC6981203 DOI: 10.1038/s41598-020-57969-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 01/07/2020] [Indexed: 11/30/2022] Open
Abstract
Lung and airway neutrophils are a hallmark of severe disease in infants with respiratory syncytial virus (RSV)-induced lower respiratory tract infections. Despite their abundance in the lungs during RSV infection of both mice and man, the role of neutrophils in viral control and in immune pathology is not clear. Here, antibody mediated neutrophil depletion was used to investigate the degree to which neutrophils impact the lung immune environment, the control of viral replication and the peak severity of disease after RSV infection of mice. Neutrophil depletion did not substantially affect the levels of inflammatory mediators such as type I interferons, IL-6, TNF-α or IL-1β in response to RSV. In addition, the lack of neutrophils did not change the viral load during RSV infection. Neither neutrophil depletion nor the enhancement of lung neutrophils by administration of the chemoattractant CXCL1 during RSV infection affected disease severity as measured by weight loss. Therefore, in this model of RSV infection, lung neutrophils do not offer obvious benefits to the host in terms of increasing anti-viral inflammatory responses or restricting viral replication and neutrophils do not contribute to disease severity.
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Affiliation(s)
- Freja Kirsebom
- National Heart and Lung Institute, Imperial College London, London, UK
| | | | | | - Cecilia Johansson
- National Heart and Lung Institute, Imperial College London, London, UK.
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159
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Li WX, Wang F, Zhu YQ, Zhang LM, Zhang ZH, Wang XM. Inhibitors of nitric oxide synthase can reduce extracellular traps from neutrophils in asthmatic children in vitro. Pediatr Pulmonol 2020; 55:68-75. [PMID: 31596059 DOI: 10.1002/ppul.24520] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 09/01/2019] [Indexed: 12/21/2022]
Abstract
AIM This study aimed to explore the link between neutrophil extracellular traps (NETs) and childhood asthma, to investigate the ability of nitric oxide (NO) to induce NETs in asthmatic children and find inhibitors to reduce NETs in the NO synthesis pathway. METHODS A total of 49 children with mild persistent asthma were included in the study and 20 healthy children's blood samples were collected as healthy controls. Children with asthma were divided into symptomatic and asymptomatic groups according to the presence or absence of symptoms on the day of blood collection. Neutrophils in peripheral blood were isolated and plasma was preserved. NO donor (sodium nitroferricyanide(III) dehydrate [SNP]) could provide NO and proved by a fluorescent probe. A PicoGreen Kit was used to detect the NETs quantificationally. Fluorescence microscopy prepared to observe the main structures of NETs. We measured NETs components (extracellular free double-stranded DNA [dsDNA]) in healthy, symptomatic and asymptomatic groups' plasma samples, and we compared the ability of SNP with phosphate-buffered saline, lipopolysaccharides (LPS), and phorbol 12-myristate 13-acetate (PMA) to induce NETs. NO synthase (NOS) inhibitors were added to see the impact on NETs formation. RESULTS Plasma was obtained from all blood samples of 69 children. The neutrophils of 40 asthmatic and 20 healthy children were successfully obtained, the recovery rate was over 95%, and the cell activity was over 80%. There was higher extracellular free dsDNA in the plasma of symptomatic group (n = 27) than asymptomatic group (n = 22) and healthy group (n = 20; P < .05). Studies on neutrophils from 40 children with asthma found that NO can be produced by adding SNP, PMA, and LPS. SNP could induce NETs with dose- and time-dependent. PMA (160 nM) had the strongest ability to induce NETs, LPS (200 ng/mL) followed, SNP (200 µM) was the weakest (P < .05), and the amount of NETs in the asthma group was significantly higher than that in the healthy group (P < .05). NOS inhibitors had the same blocking capacity for PMA- and LPS-induced NETs (P > .05), while NG-nitro- l-arginine methyl ester (500 µM) had the strongest inhibitory effect on SNP induction with time-dependent (P < .05). Inducible NOS was found in the NETs structure. CONCLUSION Children with asthma had higher levels of NETs in peripheral blood, especially when they had asthma symptoms. We verified the ability of NO to induce NETs, and found neutrophils from asthmatic children can produce more NETs in vitro. NOS inhibitors blocked this process may provide new therapeutic targets for childhood asthma.
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Affiliation(s)
- Wen-Xuan Li
- Department of Pediatrics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Fei Wang
- Department of Pediatrics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Yun-Qian Zhu
- Department of Pediatrics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Li-Mei Zhang
- Department of Pediatrics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Zhen-Hua Zhang
- Department of Pediatrics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Xiao-Ming Wang
- Department of Pediatrics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
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160
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G-CSFR antagonism reduces neutrophilic inflammation during pneumococcal and influenza respiratory infections without compromising clearance. Sci Rep 2019; 9:17732. [PMID: 31776393 PMCID: PMC6881371 DOI: 10.1038/s41598-019-54053-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 11/06/2019] [Indexed: 12/12/2022] Open
Abstract
Excessive neutrophilic inflammation can contribute to the pathogenesis of pneumonia. Whilst anti-inflammatory therapies such as corticosteroids are used to treat excessive inflammation, they do not selectively target neutrophils and may compromise antimicrobial or antiviral defences. In this study, neutrophil trafficking was targeted with a granulocyte-colony stimulating factor receptor monoclonal antibody (G-CSFR mAb) during Streptococcus pneumoniae (serotype 19F) or influenza A virus (IAV, strain HKx31) lung infection in mice. Firstly, we demonstrated that neutrophils are indispensable for the clearance of S. pneumoniae from the airways using an anti-Ly6G monoclonal antibody (1A8 mAb), as the complete inhibition of neutrophil recruitment markedly compromised bacterial clearance. Secondly, we demonstrated that G-CSF transcript lung levels were significantly increased during pneumococcal infection. Prophylactic or therapeutic administration of G-CSFR mAb significantly reduced blood and airway neutrophil numbers by 30–60% without affecting bacterial clearance. Total protein levels in the bronchoalveolar lavage (BAL) fluid (marker for oedema) was also significantly reduced. G-CSF transcript levels were also increased during IAV lung infection. G-CSFR mAb treatment significantly reduced neutrophil trafficking into BAL compartment by 60% and reduced blood neutrophil numbers to control levels in IAV-infected mice. Peak lung viral levels at day 3 were not altered by G-CSFR therapy, however there was a significant reduction in the detection of IAV in the lungs at the day 7 post-infection phase. In summary, G-CSFR signalling contributes to neutrophil trafficking in response to two common respiratory pathogens. Blocking G-CSFR reduced neutrophil trafficking and oedema without compromising clearance of two pathogens that can cause pneumonia.
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161
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Denlinger LC, Heymann P, Lutter R, Gern JE. Exacerbation-Prone Asthma. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2019; 8:474-482. [PMID: 31765853 DOI: 10.1016/j.jaip.2019.11.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 10/28/2019] [Accepted: 11/12/2019] [Indexed: 02/07/2023]
Abstract
Patients who are prone to exacerbations of asthma experience significant costs in terms of missed work and school, acute care visits, and hospitalizations. Exacerbations are largely driven by environmental exposures including pollutants, stress, and viral and bacterial pathogens. These exposures are most likely to induce acute severe "asthma attacks" in high-risk patients. These personal risk factors for exacerbations can vary with the phenotype of asthma and age of the patient. In children, allergic sensitization is a strong risk factor, especially for those children who develop sensitization early in life. Airway inflammation is an important risk factor, and biomarkers are under evaluation for utility in detecting eosinophilic and type 2 inflammation and neutrophilic inflammation as indicators of risk for recurrent exacerbations. Insights into inflammatory mechanisms have led to new approaches to prevent exacerbations using mAb-based biologics that target specific type 2 pathways. Challenges remain in developing an evidence base to support precision interventions with these effective yet expensive therapies, and in determining whether these treatments will be safe and effective in young children. Unfortunately, there has been less progress in developing treatments for acute exacerbations. Hopefully, greater understanding of mechanisms relating airway viruses, bacteria, mucin production, and neutrophilic inflammatory responses will lead to additional treatment options for patients experiencing acute exacerbations.
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Affiliation(s)
- Loren C Denlinger
- Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wis.
| | - Peter Heymann
- Department of Pediatrics, University of Virginia, Charlottesville, Va
| | - Rene Lutter
- Departments of Respiratory Medicine and Experimental Immunology, Amsterdam University Centers, University of Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - James E Gern
- Department of Pediatrics, University of Wisconsin-Madison, School of Medicine and Public Health, Madison, Wis
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A Bioinformatic Approach for the Identification of Molecular Determinants of Resistance/Sensitivity to Cancer Thermotherapy. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:4606219. [PMID: 31814876 PMCID: PMC6878812 DOI: 10.1155/2019/4606219] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 10/03/2019] [Indexed: 12/30/2022]
Abstract
Application of heat above 43°C and up to 47°C, the so-called “thermal ablation” range, leads to tumor cell destruction either by apoptosis or by necrosis. However, tumor cells have developed mechanisms of defense that render them thermoresistant. Of importance, the in situ application of heat for the treatment of localized solid tumors can also prime specific antitumor immunity. Herein, a bioinformatic approach was employed for the identification of molecular determinants implicated in thermoresistance and immunogenic cell death (ICD). To this end, both literature-derived (text mining) and microarray gene expression profile data were processed, followed by functional enrichment analysis. Two important functional gene modules were detected in hyperthermia resistance and ICD, the former including members of the heat shock protein (HSP) family of molecular chaperones and the latter including immune-related molecules, respectively. Of note, the molecules HSP90AA1 and HSPA4 were found common between thermoresistance and damage signaling molecules (damage-associated molecular patterns (DAMPs)) and ICD. In addition, the prognostic potential of HSP90AA1 and HSPA4 overexpression for cancer patients' overall survival was investigated. The results of this study could constitute the basis for the strategic development of more efficient and personalized therapeutic strategies against cancer by means of thermotherapy, by taking into consideration the genetic profile of each patient.
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163
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Ravi A, Chang M, van de Pol M, Yang S, Aliprantis A, Thornton B, Carayannopoulos LN, Bautmans A, Robberechts M, De Lepeleire I, Singh D, Hohlfeld JM, Sterk PJ, Krug N, Lutter R. Rhinovirus-16 induced temporal interferon responses in nasal epithelium links with viral clearance and symptoms. Clin Exp Allergy 2019; 49:1587-1597. [PMID: 31400236 PMCID: PMC6972523 DOI: 10.1111/cea.13481] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 06/27/2019] [Accepted: 07/30/2019] [Indexed: 12/28/2022]
Abstract
BACKGROUND The temporal in vivo response of epithelial cells to a viral challenge and its association with viral clearance and clinical outcomes has been largely unexplored in asthma. OBJECTIVE To determine gene expression profiles over time in nasal epithelial cells (NECs) challenged in vivo with rhinovirus-16 (RV16) and compare to nasal symptoms and viral clearance. METHODS Patients with stable mild to moderate asthma (n = 20) were challenged intranasally with RV16. Nasal brush samples for RNA sequencing were taken 7 days prior to infection and 3, 6 and 14 days post-infection, and blood samples 4 days prior to infection and day 6 post-infection. Viral load was measured in nasal lavage fluid at day 3, 6 and 14. RESULTS Top differentially (>2.5-fold increase) expressed gene sets in NECs post-RV16 at days 3 and 6, compared with baseline, were interferon alpha and gamma response genes. Patients clearing the virus within 6 days (early resolvers) had a significantly increased interferon response at day 6, whereas those having cleared the virus by day 14 (late resolvers) had significantly increased responses at day 3, 6 and 14. Interestingly, patients not having cleared the virus by day 14 (non-resolvers) had no enhanced interferon responses at any of these days. The daily Cold Symptom Scores (CSS) peaked at days 3 to 5 and correlated positively with interferon response genes at day 3 (R = 0.48), but not at other time-points. Interferon response genes were also enhanced in blood at day 6 after RV16 challenge. CONCLUSION AND CLINICAL RELEVANCE This study shows that viral load and clearance varies markedly over time in mild to moderate asthma patients exposed to a fixed RV16 dose. The host's nasal interferon response to RV16 at day 3 is associated with upper respiratory tract symptoms. The temporal interferon response in nasal epithelium associates with viral clearance in the nasal compartment.
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Affiliation(s)
- Abilash Ravi
- Amsterdam UMC, Department of Respiratory Medicine, University of Amsterdam, Amsterdam, The Netherlands.,Amsterdam UMC, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute, University of Amsterdam, Amsterdam, The Netherlands
| | | | - Marianne van de Pol
- Amsterdam UMC, Department of Respiratory Medicine, University of Amsterdam, Amsterdam, The Netherlands
| | - Shan Yang
- Merck & Co., Inc., Kenilworth, NJ, USA
| | | | | | | | - An Bautmans
- Merck Sharp and Dohme, Europe Inc., Brussels, Belgium
| | | | | | - Dave Singh
- Division of Infection, Immunity and Respiratory Medicine, University of Manchester, Manchester, UK
| | - Jens M Hohlfeld
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany.,German Center for Lung Research (DZL), Hannover, Germany
| | - Peter J Sterk
- Amsterdam UMC, Department of Respiratory Medicine, University of Amsterdam, Amsterdam, The Netherlands
| | - Norbert Krug
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany.,German Center for Lung Research (DZL), Hannover, Germany
| | - René Lutter
- Amsterdam UMC, Department of Respiratory Medicine, University of Amsterdam, Amsterdam, The Netherlands.,Amsterdam UMC, Department of Experimental Immunology, Amsterdam Infection & Immunity Institute, University of Amsterdam, Amsterdam, The Netherlands
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164
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Kariyawasam HH, Gane SB. Allergen-induced asthma, chronic rhinosinusitis and transforming growth factor-β superfamily signaling: mechanisms and functional consequences. Expert Rev Clin Immunol 2019; 15:1155-1170. [PMID: 31549888 DOI: 10.1080/1744666x.2020.1672538] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Introduction: Often co-associated, asthma and chronic rhinosinusitis (CRS) are complex heterogeneous disease syndromes. Severity in both is related to tissue inflammation and abnormal repair (termed remodeling). Understanding signaling factors that can modulate, integrate the activation, and regulation of such key processes together is increasingly important. The transforming growth factor (TGF)-β superfamily of ligands comprise a versatile system of immunomodulatory molecules that are gaining recognition as having an essential function in the immunopathogenesis of asthma. Early data suggest an important role in CRS as well. Abnormal or dysregulated signaling may contribute to disease pathogenesis and severity.Areas covered: The essential biology of this complex family of growth factors in relation to the excess inflammation and remodeling that occurs in allergic asthma and CRS is reviewed. The need to understand the integration of signaling pathways together is highlighted. Studies in human airway tissue are evaluated and only selected key animal models relevant to human disease discussed given the highly context-dependent signaling and function of these ligands.Expert opinion: Abnormal or dysregulated TGF-β superfamily signaling may be central to the excess inflammation and tissue remodeling in asthma, and possibly CRS. Therefore, the TGF-β superfamily signaling pathways represent an emerging and attractive therapeutic target.
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Affiliation(s)
- Harsha H Kariyawasam
- Department of Adult Specialist Allergy and Clinical Immunology, Royal National ENT Hospital, University College London Hospitals NHS Foundation Trust, London, UK.,Department of Rhinology, Royal National ENT Hospital, University College London Hospitals NHS Foundation Trust, London, UK.,University College London, London, UK
| | - Simon B Gane
- Department of Rhinology, Royal National ENT Hospital, University College London Hospitals NHS Foundation Trust, London, UK.,University College London, London, UK
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165
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de Groot LES, van de Pol MA, Fens N, Dierdorp BS, Dekker T, Kulik W, Majoor CJ, Hamann J, Sterk PJ, Lutter R. Corticosteroid Withdrawal-Induced Loss of Control in Mild to Moderate Asthma Is Independent of Classic Granulocyte Activation. Chest 2019; 157:16-25. [PMID: 31622588 DOI: 10.1016/j.chest.2019.09.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 09/03/2019] [Accepted: 09/23/2019] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Loss of asthma control and asthma exacerbations are associated with increased sputum eosinophil counts. However, whether eosinophils, or the also present neutrophils, actively contribute to the accompanying inflammation has not been extensively investigated. METHODS Twenty-three patients with mild to moderate asthma were included in a standardized prospective inhaled corticosteroid (ICS) withdrawal study; 22 of the patients experienced loss of asthma control. The study assessed various immune, inflammatory, and oxidative stress parameters, as well as markers of eosinophil and neutrophil activity, in exhaled breath condensate, plasma, and sputum collected at three phases (baseline, during loss of control, and following recovery). RESULTS Loss of asthma control was characterized by increased sputum eosinophils, whereas no differences were detected between the three phases for most inflammatory and oxidative stress responses. There were also no differences detected for markers of activated eosinophils (eosinophil cationic protein and bromotyrosine) and neutrophils (myeloperoxidase and chlorotyrosine). However, free eosinophilic granules and citrullinated histone H3, suggestive of eosinophil cytolysis and potentially eosinophil extracellular trap formation, were enhanced. Baseline blood eosinophils and changes in asymmetric dimethylarginine (an inhibitor of nitric oxide synthase) in plasma were found to correlate with the decrease in FEV1 percent predicted upon ICS withdrawal (both, rs = 0.46; P = .03). CONCLUSIONS The clinical effect in mild to moderate asthma upon interruption of ICS therapy is not related to the classic inflammatory activation of eosinophils and neutrophils. It may, however, reflect another pathway underlying the onset of loss of disease control and asthma exacerbations. TRIAL REGISTRY The Netherlands Trial Register; No.: NTR3316; URL: trialregister.nl/trial/3172.
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Affiliation(s)
- Linsey E S de Groot
- Department of Respiratory Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands; Department of Experimental Immunology (Amsterdam Infection & Immunity Institute), Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
| | - Marianne A van de Pol
- Department of Respiratory Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Niki Fens
- Department of Respiratory Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Barbara S Dierdorp
- Department of Experimental Immunology (Amsterdam Infection & Immunity Institute), Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Tamara Dekker
- Department of Experimental Immunology (Amsterdam Infection & Immunity Institute), Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Wim Kulik
- Laboratory Genetic Metabolic Diseases, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Christof J Majoor
- Department of Respiratory Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Jörg Hamann
- Department of Experimental Immunology (Amsterdam Infection & Immunity Institute), Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Peter J Sterk
- Department of Respiratory Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - René Lutter
- Department of Respiratory Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands; Department of Experimental Immunology (Amsterdam Infection & Immunity Institute), Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
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166
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Dengler HS, Wu X, Peng I, Rinderknecht CH, Kwon Y, Suto E, Kohli PB, Liimatta M, Barrett K, Lloyd J, Cain G, Briggs M, Addo S, Salmon G, Ubhayakar S, Deshmukh G, Shahidi-Latham SK, Quiason-Huynh CM, Jackman J, Liu J, Ray NC, Goodacre SC, Johnson A, McKenzie BS, Lee WP, Zak M, Kenny JR, Ghilardi N. Lung-restricted inhibition of Janus kinase 1 is effective in rodent models of asthma. Sci Transl Med 2019; 10:10/468/eaao2151. [PMID: 30463918 DOI: 10.1126/scitranslmed.aao2151] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 11/01/2018] [Indexed: 01/21/2023]
Abstract
Preclinical and clinical evidence indicates that a subset of asthma is driven by type 2 cytokines such as interleukin-4 (IL-4), IL-5, IL-9, and IL-13. Additional evidence predicts pathogenic roles for IL-6 and type I and type II interferons. Because each of these cytokines depends on Janus kinase 1 (JAK1) for signal transduction, and because many of the asthma-related effects of these cytokines manifest in the lung, we hypothesized that lung-restricted JAK1 inhibition may confer therapeutic benefit. To test this idea, we synthesized iJak-381, an inhalable small molecule specifically designed for local JAK1 inhibition in the lung. In pharmacodynamic models, iJak-381 suppressed signal transducer and activator of transcription 6 activation by IL-13. Furthermore, iJak-381 suppressed ovalbumin-induced lung inflammation in both murine and guinea pig asthma models and improved allergen-induced airway hyperresponsiveness in mice. In a model driven by human allergens, iJak-381 had a more potent suppressive effect on neutrophil-driven inflammation compared to systemic corticosteroid administration. The inhibitor iJak-381 reduced lung pathology, without affecting systemic Jak1 activity in rodents. Our data show that local inhibition of Jak1 in the lung can suppress lung inflammation without systemic Jak inhibition in rodents, suggesting that this strategy might be effective for treating asthma.
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Affiliation(s)
- Hart S Dengler
- Department of Immunology Discovery, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Xiumin Wu
- Department of Translational Immunology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Ivan Peng
- Department of Translational Immunology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Cornelia H Rinderknecht
- Department of Translational Immunology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Youngsu Kwon
- Department of Translational Immunology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Eric Suto
- Department of Translational Immunology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Pawan Bir Kohli
- Department of Biochemical Pharmacology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Marya Liimatta
- Department of Biochemical Pharmacology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Kathy Barrett
- Department of Biochemical Pharmacology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Julia Lloyd
- Department of Biology, Charles River Discovery, 8-9 Spire Green Centre, Harlow CM19 5TR, UK
| | - Gary Cain
- Department of Safety Assessment Pathology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Mike Briggs
- Department of Drug Metabolism and Pharmacokinetics, Charles River Discovery, 8-9 Spire Green Centre, Harlow CM19 5TR, UK
| | - Stephanie Addo
- Department of Drug Metabolism and Pharmacokinetics, Charles River Discovery, 8-9 Spire Green Centre, Harlow CM19 5TR, UK
| | - Gary Salmon
- Department of Biology, Charles River Discovery, 8-9 Spire Green Centre, Harlow CM19 5TR, UK
| | - Savita Ubhayakar
- Department of Drug Metabolism and Pharmacokinetics, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Gauri Deshmukh
- Department of Drug Metabolism and Pharmacokinetics, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Sheerin K Shahidi-Latham
- Department of Drug Metabolism and Pharmacokinetics, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Cristine M Quiason-Huynh
- Department of Drug Metabolism and Pharmacokinetics, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Janet Jackman
- Department of Immunology Discovery, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - John Liu
- Department of Translational Immunology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Nicholas C Ray
- Department of Chemistry, Charles River Discovery, 8-9 Spire Green Centre, Harlow CM19 5TR, UK
| | - Simon C Goodacre
- Department of Chemistry, Charles River Discovery, 8-9 Spire Green Centre, Harlow CM19 5TR, UK
| | - Adam Johnson
- Department of Biochemical Pharmacology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Brent S McKenzie
- Department of Translational Immunology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Wyne P Lee
- Department of Translational Immunology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Mark Zak
- Department of Discovery Chemistry, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Jane R Kenny
- Department of Safety Assessment Pathology, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA
| | - Nico Ghilardi
- Department of Immunology Discovery, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA.
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167
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Radermecker C, Sabatel C, Vanwinge C, Ruscitti C, Maréchal P, Perin F, Schyns J, Rocks N, Toussaint M, Cataldo D, Johnston SL, Bureau F, Marichal T. Locally instructed CXCR4 hi neutrophils trigger environment-driven allergic asthma through the release of neutrophil extracellular traps. Nat Immunol 2019; 20:1444-1455. [PMID: 31591573 PMCID: PMC6859073 DOI: 10.1038/s41590-019-0496-9] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 08/15/2019] [Indexed: 02/07/2023]
Abstract
Low exposure to microbial products, respiratory viral infections and air pollution is a major risk factor for allergic asthma, yet the mechanistic links between such conditions and host susceptibility to type 2 allergic disorders remain unclear. Through the use of single-cell RNA sequencing (scRNA-seq), we characterized lung neutrophils in mice exposed to a pro-allergic, low dose of lipopolysaccharides (LPSlo) or a protective, high dose of LPS (LPShi) before exposure to house dust mite (HDM). Unlike exposure to LPShi, exposure to LPSlo instructed recruited neutrophils to upregulate the expression of the chemokine receptor CXCR4 and to release neutrophil extracellular traps (NETs). The LPSlo-induced neutrophils and NETs potentiated the uptake of HDM by CD11b+Ly-6C+ dendritic cells (DCs) and type 2 allergic airway inflammation in response to HDM. NETs derived from CXCR4hi neutrophils were also needed to mediate allergic asthma triggered by infection with influenza virus or exposure to ozone. Our study indicates that apparently unrelated environmental risk factors can shape recruited lung neutrophils to promote the initiation of allergic asthma.
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Affiliation(s)
- Coraline Radermecker
- Laboratory of Cellular and Molecular Immunology, GIGA Institute, Liege University, Liege, Belgium.,Laboratory of Immunophysiology, GIGA Institute, Liege University, Liege, Belgium.,Faculty of Veterinary Medicine, Liege University, Liege, Belgium
| | - Catherine Sabatel
- Laboratory of Cellular and Molecular Immunology, GIGA Institute, Liege University, Liege, Belgium.,Faculty of Veterinary Medicine, Liege University, Liege, Belgium
| | - Céline Vanwinge
- Laboratory of Tumor and Development Biology, GIGA Institute, Liege University, Liege, Belgium
| | - Cecilia Ruscitti
- Laboratory of Immunophysiology, GIGA Institute, Liege University, Liege, Belgium.,Faculty of Veterinary Medicine, Liege University, Liege, Belgium
| | - Pauline Maréchal
- Laboratory of Immunophysiology, GIGA Institute, Liege University, Liege, Belgium.,Faculty of Veterinary Medicine, Liege University, Liege, Belgium
| | - Fabienne Perin
- Laboratory of Tumor and Development Biology, GIGA Institute, Liege University, Liege, Belgium
| | - Joey Schyns
- Laboratory of Cellular and Molecular Immunology, GIGA Institute, Liege University, Liege, Belgium.,Laboratory of Immunophysiology, GIGA Institute, Liege University, Liege, Belgium.,Faculty of Veterinary Medicine, Liege University, Liege, Belgium
| | - Natacha Rocks
- Laboratory of Tumor and Development Biology, GIGA Institute, Liege University, Liege, Belgium
| | - Marie Toussaint
- Airway Disease Section, National Heart and Lung Institute, Imperial College London, London, UK.,Medical Research Council and Asthma UK Centre in Allergic Mechanisms of Asthma, London, UK
| | - Didier Cataldo
- Laboratory of Tumor and Development Biology, GIGA Institute, Liege University, Liege, Belgium
| | - Sebastian L Johnston
- Airway Disease Section, National Heart and Lung Institute, Imperial College London, London, UK.,Medical Research Council and Asthma UK Centre in Allergic Mechanisms of Asthma, London, UK.,Imperial College Healthcare National Health Service Trust, London, UK
| | - Fabrice Bureau
- Laboratory of Cellular and Molecular Immunology, GIGA Institute, Liege University, Liege, Belgium. .,Faculty of Veterinary Medicine, Liege University, Liege, Belgium. .,Walloon Excellence in Life Sciences and Biotechnology, Wallonia, Belgium.
| | - Thomas Marichal
- Laboratory of Cellular and Molecular Immunology, GIGA Institute, Liege University, Liege, Belgium. .,Laboratory of Immunophysiology, GIGA Institute, Liege University, Liege, Belgium. .,Faculty of Veterinary Medicine, Liege University, Liege, Belgium. .,Walloon Excellence in Life Sciences and Biotechnology, Wallonia, Belgium.
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168
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Ozasa K, Temizoz B, Kusakabe T, Kobari S, Momota M, Coban C, Ito S, Kobiyama K, Kuroda E, Ishii KJ. Cyclic GMP-AMP Triggers Asthma in an IL-33-Dependent Manner That Is Blocked by Amlexanox, a TBK1 Inhibitor. Front Immunol 2019; 10:2212. [PMID: 31616416 PMCID: PMC6775192 DOI: 10.3389/fimmu.2019.02212] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 09/02/2019] [Indexed: 01/01/2023] Open
Abstract
Extracellular host-derived DNA, as one of damage associated molecular patterns (DAMPs), is associated with allergic type 2 immune responses. Immune recognition of such DNA generates the second messenger cyclic GMP-AMP (cGAMP) and induces type-2 immune responses; however, its role in allergic diseases, such as asthma, has not been fully elucidated. This study aimed to determine whether cGAMP could induce asthma when used as an adjuvant. We intranasally sensitized mice with cGAMP together with house dust mite antigen (HDM), followed by airway challenge with HDM. We then assessed the levels of eosinophils in the broncho-alveolar lavage fluid (BALF) and serum HDM-specific antibodies. cGAMP promoted HDM specific allergic asthma, characterized by significantly increased HDM specific IgG1 and total IgE in the serum and infiltration of eosinophils in the BALF. cGAMP stimulated lung fibroblast cells to produce IL-33 in vitro, and mice deficient for IL-33 or IL-33 receptor (ST2) failed to develop asthma enhancement by cGAMP. Not only Il-33 -/- mice, but also Sting -/-, Tbk1 -/-, and Irf3 -/- Irf7 -/- mice which lack the cGAMP-mediated innate immune activation failed to increase eosinophils in the BALF than that from wild type mice. Consistently, intranasal and oral administration of amlexanox, a TBK1 inhibitor, decreased cGAMP-induced lung allergic inflammation. Thus, cGAMP functions as a type 2 adjuvant in the lung and can promote allergic asthma in manners that dependent on the intracellular STING/TBK1/IRF3/7 signaling pathway and the resultant intercellular signaling pathway via IL-33 and ST2 might be a novel therapeutic target for allergic asthma.
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Affiliation(s)
- Koji Ozasa
- Laboratory of Adjuvant Innovation, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan.,Department of Pediatrics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Burcu Temizoz
- Laboratory of Adjuvant Innovation, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan.,Laboratory of Vaccine Science, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan.,Division of Vaccine Science, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Takato Kusakabe
- Laboratory of Adjuvant Innovation, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan.,Laboratory of Vaccine Science, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan.,Laboratory of Mock-Up Vaccine Project, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Shingo Kobari
- Laboratory of Adjuvant Innovation, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan.,Department of Pediatrics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Masatoshi Momota
- Laboratory of Adjuvant Innovation, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan.,Laboratory of Mock-Up Vaccine Project, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Cevayir Coban
- International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Laboratory of Malaria Immunology, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan.,Division of Malaria Immunology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Shuichi Ito
- Department of Pediatrics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Kouji Kobiyama
- Laboratory of Adjuvant Innovation, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan.,Laboratory of Vaccine Science, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan.,Division of Vaccine Science, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Etsushi Kuroda
- Laboratory of Adjuvant Innovation, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan.,Laboratory of Vaccine Science, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan.,Department of Immunology, Hyogo College of Medicine, Nishinomiya, Japan
| | - Ken J Ishii
- Laboratory of Adjuvant Innovation, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan.,Laboratory of Vaccine Science, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan.,Division of Vaccine Science, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Laboratory of Mock-Up Vaccine Project, Center for Vaccine and Adjuvant Research, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
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169
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Almendros I, El-Merhie N, Jha A, Keir HR, Lykouras D, Mahmutovic Persson I, Ubags ND, Bartel S. Early Career Members at the Lung Science Conference and the Sleep and Breathing Conference 2019. Breathe (Sheff) 2019; 15:234-240. [PMID: 31508161 PMCID: PMC6717613 DOI: 10.1183/20734735.0203-2019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The European Respiratory Society (ERS) Lung Science Conference (LSC) is the basic science conference of the ERS and it takes place every March in Estoril, Portugal. It is important to note that, particularly at this conference, there is a lot of emphasis on the inclusion and development of Early Career Members. For example, each session is chaired by one Early Career Member together with a more senior scientist; there are 40 travel bursaries to enable abstract authors to attend the conference; there is a mentorship lunch session; and every year the Early Career Member Committee (ECMC) organises a specifically dedicated Early Career Member career development session on the Saturday afternoon. Thus, there are many reasons for Early Career Members to attend this conference but, for those who could not attend, we will describe here the scientific highlights of the LSC 2019 on the topic “Mechanisms of acute exacerbation of respiratory disease”. The Lung Science Conference and the Sleep and Breathing Conference 2019 brought together leading experts in the field to discuss the latest cutting-edge science, as well as various career development opportunities for early career membershttp://bit.ly/2XNX6V6
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Affiliation(s)
- Isaac Almendros
- Unitat de Biofísica i Bioenginyeria, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Respiratorias, Madrid, Spain
| | - Natalia El-Merhie
- Research Center Borstel, Leibniz Lung Center, Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL), Borstel, Germany
| | - Akhilesh Jha
- Dept of Medicine, University of Cambridge, Cambridge, UK.,National Heart and Lung Institute, Imperial College London, London, UK
| | - Holly R Keir
- Division of Molecular and Clinical Medicine, Ninewells Hospital, University of Dundee, Dundee, UK
| | - Dimosthenis Lykouras
- Dept of Respiratory Medicine, University Hospital of Patras, Rion Patras, Greece
| | - Irma Mahmutovic Persson
- Institution of Medical Radiation Physics, Dept of Translational Medicine, Lund University, Malmö, Sweden
| | - Niki D Ubags
- Faculty of Biology and Medicine, University of Lausanne, Service de Pneumologie, CHUV, Epalinges, Switzerland
| | - Sabine Bartel
- University of Groningen, University Medical Center Groningen, Dept of Pathology and Medical Biology, GRIAC Research Institute, Groningen, The Netherlands.,All authors are sorted alphabetically, except for S. Bartel
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170
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Hossain FMA, Choi JY, Uyangaa E, Park SO, Eo SK. The Interplay between Host Immunity and Respiratory Viral Infection in Asthma Exacerbation. Immune Netw 2019; 19:e31. [PMID: 31720042 PMCID: PMC6829071 DOI: 10.4110/in.2019.19.e31] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 08/22/2019] [Accepted: 08/25/2019] [Indexed: 12/16/2022] Open
Abstract
Asthma is one of the most common and chronic diseases characterized by multidimensional immune responses along with poor prognosis and severity. The heterogeneous nature of asthma may be attributed to a complex interplay between risk factors (either intrinsic or extrinsic) and specific pathogens such as respiratory viruses, and even bacteria. The intrinsic risk factors are highly correlated with asthma exacerbation in host, which may be mediated via genetic polymorphisms, enhanced airway epithelial lysis, apoptosis, and exaggerated viral replication in infected cells, resulting in reduced innate immune response and concomitant reduction of interferon (types I, II, and III) synthesis. The canonical features of allergic asthma include strong Th2-related inflammation, sensitivity to non-steroidal anti-inflammatory drugs (NSAIDs), eosinophilia, enhanced levels of Th2 cytokines, goblet cell hyperplasia, airway hyper-responsiveness, and airway remodeling. However, the NSAID-resistant non-Th2 asthma shows a characteristic neutrophilic influx, Th1/Th17 or even mixed (Th17-Th2) immune response and concurrent cytokine streams. Moreover, inhaled corticosteroid-resistant asthma may be associated with multifactorial innate and adaptive responses. In this review, we will discuss the findings of various in vivo and ex vivo models to establish the critical heterogenic asthmatic etiologies, host-pathogen relationships, humoral and cell-mediated immune responses, and subsequent mechanisms underlying asthma exacerbation triggered by respiratory viral infections.
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Affiliation(s)
- Ferdaus Mohd Altaf Hossain
- College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan 54596, Korea.,Faculty of Veterinary, Animal and Biomedical Sciences, Sylhet Agricultural University, Sylhet 3100, Bangladesh
| | - Jin Young Choi
- College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - Erdenebileg Uyangaa
- College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - Seong Ok Park
- College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan 54596, Korea
| | - Seong Kug Eo
- College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University, Iksan 54596, Korea
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171
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Maeda K, Caldez MJ, Akira S. Innate immunity in allergy. Allergy 2019; 74:1660-1674. [PMID: 30891811 PMCID: PMC6790574 DOI: 10.1111/all.13788] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 02/26/2019] [Accepted: 03/10/2019] [Indexed: 12/13/2022]
Abstract
Innate immune system quickly responds to invasion of microbes and foreign substances through the extracellular and intracellular sensing receptors, which recognize distinctive molecular and structural patterns. The recognition of innate immune receptors leads to the induction of inflammatory and adaptive immune responses by activating downstream signaling pathways. Allergy is an immune-related disease and results from a hypersensitive immune response to harmless substances in the environment. However, less is known about the activation of innate immunity during exposure to allergens. New insights into the innate immune system by sensors and their signaling cascades provide us with more important clues and a framework for understanding allergy disorders. In this review, we will focus on recent advances in the innate immune sensing system.
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Affiliation(s)
- Kazuhiko Maeda
- Laboratory of Host Defense, The World Premier International Research Center Initiative (WPI) Immunology Frontier Research Center (IFReC) Osaka University Osaka Japan
| | - Matias J. Caldez
- Laboratory of Host Defense, The World Premier International Research Center Initiative (WPI) Immunology Frontier Research Center (IFReC) Osaka University Osaka Japan
| | - Shizuo Akira
- Laboratory of Host Defense, The World Premier International Research Center Initiative (WPI) Immunology Frontier Research Center (IFReC) Osaka University Osaka Japan
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172
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Ravi A, Chowdhury S, Dijkhuis A, Bonta PI, Sterk PJ, Lutter R. Neutrophilic inflammation in asthma and defective epithelial translational control. Eur Respir J 2019; 54:13993003.00547-2019. [PMID: 31109984 DOI: 10.1183/13993003.00547-2019] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 05/10/2019] [Indexed: 01/25/2023]
Abstract
Neutrophilic inflammation in asthma is associated with interleukin (IL)-17A, corticosteroid-insensitivity and bronchodilator-induced forced expiratory volume in 1 s (FEV1) reversibility. IL-17A synergises with tumour necrosis factor (TNF)-α in the production of the neutrophil chemokine CXCL-8 by primary bronchial epithelial cells (PBECs).We hypothesised that local neutrophilic inflammation in asthma correlates with IL-17A and TNF-α-induced CXCL-8 production by PBECs from asthma patients.PBECs from most asthma patients displayed an exaggerated CXCL-8 production in response to TNF-α and IL-17A, but not to TNF-α alone, and which was also insensitive to corticosteroids. This hyperresponsiveness of PBECs strongly correlated with CXCL-8 levels and neutrophil numbers in bronchoalveolar lavage from the corresponding patients, but not with that of eosinophils. In addition, this hyperresponsiveness also correlated with bronchodilator-induced FEV1 % reversibility. At the molecular level, epithelial hyperresponsiveness was associated with failure of the translational repressor T-cell internal antigen-1 related protein (TiAR) to translocate to the cytoplasm to halt CXCL-8 production, as confirmed by TiAR knockdown. This is in line with the finding that hyperresponsive PBECs also produced enhanced levels of other inflammatory mediators.Hyperresponsive PBECs in asthma patients may underlie neutrophilic and corticosteroid-insensitive inflammation and a reduced FEV1, irrespective of eosinophilic inflammation. Normalising cytoplasmic translocation of TiAR is a potential therapeutic target in neutrophilic, corticosteroid-insensitive asthma.
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Affiliation(s)
- Abilash Ravi
- Amsterdam UMC, University of Amsterdam, Dept of Respiratory Medicine, Amsterdam, The Netherlands.,Amsterdam UMC, University of Amsterdam, Dept of Experimental Immunology, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Saheli Chowdhury
- Amsterdam UMC, University of Amsterdam, Dept of Respiratory Medicine, Amsterdam, The Netherlands.,Amsterdam UMC, University of Amsterdam, Dept of Experimental Immunology, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Annemiek Dijkhuis
- Amsterdam UMC, University of Amsterdam, Dept of Experimental Immunology, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Peter I Bonta
- Amsterdam UMC, University of Amsterdam, Dept of Respiratory Medicine, Amsterdam, The Netherlands
| | - Peter J Sterk
- Amsterdam UMC, University of Amsterdam, Dept of Respiratory Medicine, Amsterdam, The Netherlands
| | - René Lutter
- Amsterdam UMC, University of Amsterdam, Dept of Respiratory Medicine, Amsterdam, The Netherlands .,Amsterdam UMC, University of Amsterdam, Dept of Experimental Immunology, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
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173
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Benmerzoug S, Ryffel B, Togbe D, Quesniaux VF. Self-DNA Sensing in Lung Inflammatory Diseases. Trends Immunol 2019; 40:719-734. [DOI: 10.1016/j.it.2019.06.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 05/31/2019] [Accepted: 06/04/2019] [Indexed: 02/07/2023]
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174
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Johansson K, McSorley HJ. Interleukin-33 in the developing lung-Roles in asthma and infection. Pediatr Allergy Immunol 2019; 30:503-510. [PMID: 30734382 DOI: 10.1111/pai.13040] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/06/2019] [Accepted: 01/08/2019] [Indexed: 02/07/2023]
Abstract
It has become increasingly clear that interleukin-33 (IL-33) plays a crucial role in initiation of type 2 immunity. The last decade of intense research has uncovered multiple mechanisms through which IL-33 targets key effector cells of the allergic immune response. Recently, IL-33 has been implicated in shaping the immune system of the lungs early in life, at a time which is crucial in the subsequent development of allergic asthma. In this review, we will address the current literature describing the role of IL-33 in the healthy and diseased lung. In particular, we will focus on the evidence for IL-33 in the development of immune responses in the lung, including the role of IL-33-responsive immune cells that may explain susceptibility to allergic sensitization at a young age and the association between genetic variants of IL-33 and asthma in humans. Finally, we will indicate areas for potential therapeutic modulation of the IL-33 pathway.
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Affiliation(s)
- Kristina Johansson
- Department of Microbiology and Immunology, Sandler Asthma Basic Research Center, University of California, San Francisco, California.,Department of Medicine, University of California, San Francisco, California
| | - Henry J McSorley
- Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
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175
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Bordon Y. Asthma and allergy: The NET effect of respiratory viruses. Nat Rev Immunol 2019; 17:346-347. [PMID: 28548133 DOI: 10.1038/nri.2017.60] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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176
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Jönsson F, de Chaisemartin L, Granger V, Gouel-Chéron A, Gillis CM, Zhu Q, Dib F, Nicaise-Roland P, Ganneau C, Hurtado-Nedelec M, Paugam-Burtz C, Necib S, Keita-Meyer H, Le Dorze M, Cholley B, Langeron O, Jacob L, Plaud B, Fischler M, Sauvan C, Guinnepain MT, Montravers P, Aubier M, Bay S, Neukirch C, Tubach F, Longrois D, Chollet-Martin S, Bruhns P. An IgG-induced neutrophil activation pathway contributes to human drug-induced anaphylaxis. Sci Transl Med 2019; 11:11/500/eaat1479. [DOI: 10.1126/scitranslmed.aat1479] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 12/21/2018] [Accepted: 05/21/2019] [Indexed: 12/20/2022]
Abstract
Anaphylaxis is a systemic acute hypersensitivity reaction that is considered to depend on allergen-specific immunoglobulin E (IgE) antibodies and histamine release by mast cells and basophils. Nevertheless, allergen-specific IgG antibodies have been proposed to contribute when the allergen is an abundant circulating large molecule, e.g., after infusions of therapeutic antibodies or dextran. Data from animal models demonstrate a pathway involving platelet-activating factor (PAF) release by monocytes/macrophages and neutrophils activated via their Fc gamma receptors (FcγRs). We hypothesized that such a pathway may also apply to small drugs and could be responsible for non–IgE-mediated anaphylaxis and influence anaphylaxis severity in humans. We prospectively conducted a multicentric study of 86 patients with suspected anaphylaxis to neuromuscular-blocking agents (NMBAs) during general anesthesia and 86 matched controls. We found that concentrations of anti-NMBA IgG and markers of FcγR activation, PAF release, and neutrophil activation correlated with anaphylaxis severity. Neutrophils underwent degranulation and NETosis early after anaphylaxis onset, and plasma-purified anti-NMBA IgG triggered neutrophil activation ex vivo in the presence of NMBA. Neutrophil activation could also be observed in patients lacking evidence of classical IgE-dependent anaphylaxis. This study supports the existence of an IgG-neutrophil pathway in human NMBA-induced anaphylaxis, which may aggravate anaphylaxis in combination with the IgE pathway or underlie anaphylaxis in the absence of specific IgE. These results reconcile clinical and experimental data on the role of antibody classes in anaphylaxis and could inform diagnostic approaches to NMBA-induced acute hypersensitivity reactions.
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177
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Heil M, Brockmeyer NH. Self-DNA Sensing Fuels HIV-1-Associated Inflammation. Trends Mol Med 2019; 25:941-954. [PMID: 31300343 DOI: 10.1016/j.molmed.2019.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 05/01/2019] [Accepted: 06/17/2019] [Indexed: 02/07/2023]
Abstract
Inflammation, over-reacting innate immunity, and CD4+ T cell depletion are hallmarks of HIV-1 infection. Self-DNA is usually not considered in the context of HIV-1-associated inflammation, although self-DNA contributes to inflammation in diverse pathologies, including autoimmune diseases, cancer, multiorgan failure after trauma, and even virus infections. Cells undergoing HIV-1-associated pyroptotic bystander cell death release self-DNA and other damage-associated molecular patterns (DAMPs), including chaperones and histones. In complexes with such DAMPs or extracellular vesicles, self-DNA gains immunogenic potential and becomes accessible to intracellular DNA sensors. Therefore, we hypothesize that self-DNA can contribute to HIV-1-associated inflammation. Self-DNA might not only drive HIV-1-associated 'inflamm-ageing' but also provide new opportunities for 'shock and kill' strategies aimed at eliminating latent HIV-1.
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Affiliation(s)
- Martin Heil
- Department of Genetic Engineering, CINVESTAV-Irapuato, Irapuato, Guanajuato, Mexico.
| | - Norbert H Brockmeyer
- WIR 'Walk In Ruhr' - Center for Sexual Health and Medicine, German Competence Net HIV/AIDS, University of Bochum, Bochum, Germany
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178
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Han M, Bentley JK, Rajput C, Lei J, Ishikawa T, Jarman CR, Lee J, Goldsmith AM, Jackson WT, Hoenerhoff MJ, Lewis TC, Hershenson MB. Inflammasome activation is required for human rhinovirus-induced airway inflammation in naive and allergen-sensitized mice. Mucosal Immunol 2019; 12:958-968. [PMID: 31089187 PMCID: PMC6668626 DOI: 10.1038/s41385-019-0172-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 04/09/2019] [Accepted: 04/29/2019] [Indexed: 02/04/2023]
Abstract
Activation of the inflammasome is a key function of the innate immune response that regulates inflammation in response to microbial substances. Inflammasome activation by human rhinovirus (RV), a major cause of asthma exacerbations, has not been well studied. We examined whether RV induces inflammasome activation in vivo, molecular mechanisms underlying RV-stimulated inflammasome priming and activation, and the contribution of inflammasome activation to RV-induced airway inflammation and exacerbation. RV infection triggered lung mRNA and protein expression of pro-IL-1β and NLRP3, indicative of inflammasome priming, as well as cleavage of caspase-1 and pro-IL-1β, completing inflammasome activation. Immunofluorescence staining showed IL-1β in lung macrophages. Depletion with clodronate liposomes and adoptive transfer experiments showed macrophages to be required and sufficient for RV-induced inflammasome activation. TLR2 was required for RV-induced inflammasome priming in vivo. UV irradiation blocked inflammasome activation and RV genome was sufficient for inflammasome activation in primed cells. Naive and house dust mite-treated NLRP3-/- and IL-1β-/- mice, as well as IL-1 receptor antagonist-treated mice, showed attenuated airway inflammation and responsiveness following RV infection. We conclude that RV-induced inflammasome activation is required for maximal airway inflammation and hyperresponsiveness in naive and allergic mice. The inflammasome represents a molecular target for RV-induced asthma exacerbations.
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Affiliation(s)
- Mingyuan Han
- Department of Pediatrics,University of Michigan Medical School, Ann Arbor, MI 48109
| | - J. Kelley Bentley
- Department of Pediatrics,University of Michigan Medical School, Ann Arbor, MI 48109
| | - Charu Rajput
- Department of Pediatrics,University of Michigan Medical School, Ann Arbor, MI 48109
| | - Jing Lei
- Department of Pediatrics,University of Michigan Medical School, Ann Arbor, MI 48109
| | - Tomoko Ishikawa
- Department of Pediatrics,University of Michigan Medical School, Ann Arbor, MI 48109
| | - Caitlin R. Jarman
- Department of Pediatrics,University of Michigan Medical School, Ann Arbor, MI 48109
| | - Julie Lee
- Department of Pediatrics,University of Michigan Medical School, Ann Arbor, MI 48109
| | - Adam M. Goldsmith
- Department of Pediatrics,University of Michigan Medical School, Ann Arbor, MI 48109
| | - William T. Jackson
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD 21201
| | - Mark J. Hoenerhoff
- Department of Unit for Laboratory Animal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Toby C. Lewis
- Department of Pediatrics,University of Michigan Medical School, Ann Arbor, MI 48109
| | - Marc B. Hershenson
- Department of Pediatrics,University of Michigan Medical School, Ann Arbor, MI 48109;,Department of Molecular and Integrative Physiology,University of Michigan Medical School, Ann Arbor, MI 48109
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179
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Song C, Li H, Li Y, Dai M, Zhang L, Liu S, Tan H, Deng P, Liu J, Mao Z, Li Q, Su X, Long Y, Lin F, Zeng Y, Fan Y, Luo B, Hu C, Pan P. NETs promote ALI/ARDS inflammation by regulating alveolar macrophage polarization. Exp Cell Res 2019; 382:111486. [PMID: 31255598 DOI: 10.1016/j.yexcr.2019.06.031] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 06/23/2019] [Accepted: 06/24/2019] [Indexed: 01/02/2023]
Abstract
Neutrophils activated during acute lung injury (ALI) form neutrophil extracellular traps (NETs) to capture pathogens. However, excessive NETs can cause severe inflammatory reactions. Macrophages are classified as M1 macrophages with proinflammatory effects or M2 macrophages with anti-inflammatory effects. During ALI, alveolar macrophages (AMs) polarize to the M1 phenotype. This study tested the hypothesis that NETs may aggravate ALI or acute respiratory distress syndrome (ARDS) inflammation by promoting alveolar macrophage polarization to the M1 type. Our research was carried out in three aspects: clinical research, animal experiments and in vitro experiments. We determined that NET levels in ARDS patients were positively correlated with M1-like macrophage polarization. NET formation was detected in murine ALI tissue and associated with increased M1 markers and decreased M2 markers in BALF and lung tissue. Treatment with NET inhibitors significantly inhibitor NETs generation, downregulated M1 markers and upregulated M2 markers. Regardless of LPS pre-stimulation, significant secretion of proinflammatory cytokines and upregulated M1 markers were detected from bone marrow-derived macrophages (M0 and M2) cocultured with high concentrations of NETs; conversely, M2 markers were downregulated. In conclusion, NETs promote ARDS inflammation during the acute phase by promoting macrophage polarization to the M1 phenotype. We propose that NETs play an important role in the interaction between neutrophils and macrophages during the early acute phase of ALI.
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Affiliation(s)
- Chao Song
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Haitao Li
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Yi Li
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Minhui Dai
- Respiratory Department, Xiangya Hospital, Central South University, China
| | | | - Shuai Liu
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Hongyi Tan
- Central Hospital, Changsha, Hunan Province, China
| | - Pengbo Deng
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Jingjing Liu
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Zhi Mao
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Qian Li
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Xiaoli Su
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Yuan Long
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Fengyu Lin
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Yanjun Zeng
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Yifei Fan
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Bailing Luo
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Chengping Hu
- Respiratory Department, Xiangya Hospital, Central South University, China
| | - Pinhua Pan
- Respiratory Department, Xiangya Hospital, Central South University, China.
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180
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Shi Y, Shi H, Nieman DC, Hu Q, Yang L, Liu T, Zhu X, Wei H, Wu D, Li F, Cui Y, Chen P. Lactic Acid Accumulation During Exhaustive Exercise Impairs Release of Neutrophil Extracellular Traps in Mice. Front Physiol 2019; 10:709. [PMID: 31263423 PMCID: PMC6585869 DOI: 10.3389/fphys.2019.00709] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 05/21/2019] [Indexed: 01/08/2023] Open
Abstract
Lactic acid (LA) is a sensitive indicator of exercise intensity and duration. A single bout of prolonged and intensive exercise can cause transient immunosuppression through the interaction of cellular, humoral, and hormone factors. Exercise-induced influences on neutrophil extracellular traps (NETs) release have been reported, but the underlying mechanism is unknown. This study investigated NETs release, cell-free DNA (cf-DNA), and LA concentration in mice after 60 and 145 min of intensive, graded treadmill running. The concentration of LA and cf-DNA increased, while the level of myeloperoxidase-DNA (MPO-DNA) (an indicator of NETs release) decreased during 145 min of exhaustive running. LA was positively and negatively correlated with cf-DNA and MPO-DNA (R 2 = 0.57 and 0.53, respectively, both p < 0.001). Subsequent in vitro experiments were conducted with neutrophils activated by phorbol myristate acetate (PMA) in the presence of LA at different concentrations. Increasing LA concentrations were associated with decreases in NETs release and reactive oxygen species (ROS) formation. Taken together, this work furthers our understanding of how NETs and oxidative reaction respond to one bout of prolonged and intensive running. The data support a negative relationship between LA accumulation and NETs release after heavy exertion.
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Affiliation(s)
- Yue Shi
- School of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Hui Shi
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - David C. Nieman
- Human Performance Laboratory, Appalachian State University, North Carolina Research Campus, Kannapolis, NC, United States
| | - Qiongyi Hu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Luyu Yang
- Department of General Surgery, Huashan Hospital, Cancer Metastasis Institute, Fudan University, Shanghai, China
| | - Tingting Liu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaofeng Zhu
- Normal College, Jiaxing University, Jiaxing, China
| | - Hongzhan Wei
- School of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Die Wu
- School of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Fei Li
- School of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Yanqiu Cui
- School of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Peijie Chen
- School of Kinesiology, Shanghai University of Sport, Shanghai, China
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181
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Cao Y, Chen F, Sun Y, Hong H, Wen Y, Lai Y, Xu Z, Luo X, Chen Y, Shi J, Li H. LL‐37 promotes neutrophil extracellular trap formation in chronic rhinosinusitis with nasal polyps. Clin Exp Allergy 2019; 49:990-999. [PMID: 31046155 DOI: 10.1111/cea.13408] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 04/20/2019] [Accepted: 04/24/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Yujie Cao
- Otorhinolaryngology Hospital The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
| | - Fenghong Chen
- Otorhinolaryngology Hospital The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
| | - Yueqi Sun
- Otorhinolaryngology Hospital The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
| | - Haiyu Hong
- Department of Otolaryngology The Fifth Affiliated Hospital of Sun Yat‐sen University Zhuhai China
| | - Yihui Wen
- Otorhinolaryngology Hospital The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
| | - Yinyan Lai
- Otorhinolaryngology Hospital The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
| | - Zhaofeng Xu
- Otorhinolaryngology Hospital The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
| | - Xin Luo
- Otorhinolaryngology Hospital The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
| | - Yang Chen
- Otorhinolaryngology Hospital The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
| | - Jianbo Shi
- Otorhinolaryngology Hospital The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
| | - Huabin Li
- Otorhinolaryngology Hospital The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
- Department of Otolaryngology, Head and Neck Surgery, Affiliated Eye and ENT Hospital Fudan University Shanghai China
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182
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Rocks N, Vanwinge C, Radermecker C, Blacher S, Gilles C, Marée R, Gillard A, Evrard B, Pequeux C, Marichal T, Noel A, Cataldo D. Ozone-primed neutrophils promote early steps of tumour cell metastasis to lungs by enhancing their NET production. Thorax 2019; 74:768-779. [PMID: 31142617 DOI: 10.1136/thoraxjnl-2018-211990] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 03/21/2019] [Accepted: 04/10/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND Air pollution, including particulates and gazes such as ozone (O3), is detrimental for patient's health and has repeatedly been correlated to increased morbidity and mortality in industrialised countries. Although studies have described a link between ambient particulate matter and increased lung cancer morbidity, no direct relation has yet been established between O3 exposure and metastatic dissemination to lungs. OBJECTIVES To outline the mechanisms through which pulmonary O3 exposure modulates metastasis kinetics in an experimental mouse model of O3 exposure. METHODS Metastatic responses to pulmonary O3 exposure were assessed using a reliable experimental mouse model of concomitant pulmonary O3 exposure and tumour cell injection. Roles of neutrophils in O3-induced lung metastasis were highlighted using blocking anti-Ly6G antibodies; moreover, the implication of neutrophil extracellular traps (NETs) in metastatic processes was evaluated using MRP8cre-Pad4lox/lox mice or by treating mice with DNase I. RESULTS Pulmonary O3 exposure strongly facilitates the establishment of lung metastasis by (1) Inducing a pulmonary injury and neutrophilic inflammation, (2) Influencing very early steps of metastasis, (3) Priming neutrophils' phenotype to release NETs that favour tumour cell colonisation in lungs. The ability of O3-primed neutrophils to enhance lung colonisation by tumour cells was proven after their adoptive transfer in Balb/c mice unexposed to O3. CONCLUSIONS Pulmonary neutrophils induced by O3 promote metastatic dissemination to lungs by producing NETs. These findings open new perspectives to improve treatment and prevention strategies in patients affected by metastatic diseases.
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Affiliation(s)
- Natacha Rocks
- Laboratory of Tumor and Development Biology, GIGA Research Center, Department of Biomedical and Preclinical Sciences, University of Liège, Liège, Belgium
| | - Céline Vanwinge
- Laboratory of Tumor and Development Biology, GIGA Research Center, Department of Biomedical and Preclinical Sciences, University of Liège, Liège, Belgium
| | - Coraline Radermecker
- Laboratory of Cellular and Molecular Immunology, GIGA Research Center, University of Liège, Liège, Belgium.,Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Silvia Blacher
- Laboratory of Tumor and Development Biology, GIGA Research Center, Department of Biomedical and Preclinical Sciences, University of Liège, Liège, Belgium
| | - Christine Gilles
- Laboratory of Tumor and Development Biology, GIGA Research Center, Department of Biomedical and Preclinical Sciences, University of Liège, Liège, Belgium
| | - Raphael Marée
- Montefiore Institute, Department of Electrical Engineering and Computer Science, University of Liège, Liège, Belgium
| | - Alison Gillard
- Laboratory of Tumor and Development Biology, GIGA Research Center, Department of Biomedical and Preclinical Sciences, University of Liège, Liège, Belgium
| | - Brigitte Evrard
- Laboratory of Pharmaceutical Technology and Biopharmacy, Department of Pharmacy, Center for Interdisciplinary Research on Medicines (CIRM), University of Liège, Liège, Belgium
| | - Christel Pequeux
- Laboratory of Tumor and Development Biology, GIGA Research Center, Department of Biomedical and Preclinical Sciences, University of Liège, Liège, Belgium
| | - Thomas Marichal
- Laboratory of Cellular and Molecular Immunology, GIGA Research Center, University of Liège, Liège, Belgium.,Faculty of Veterinary Medicine, University of Liège, Liège, Belgium.,WELBIO, Walloon Excellence in Life Sciences and Biotechnology, Wallonia, Belgium
| | - Agnes Noel
- Laboratory of Tumor and Development Biology, GIGA Research Center, Department of Biomedical and Preclinical Sciences, University of Liège, Liège, Belgium
| | - Didier Cataldo
- Laboratory of Tumor and Development Biology, GIGA Research Center, Department of Biomedical and Preclinical Sciences, University of Liège, Liège, Belgium .,Respiratory Diseases, CHU Liège and University of Liège, Liège, Belgium
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183
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Burleson JD, Siniard D, Yadagiri VK, Chen X, Weirauch MT, Ruff BP, Brandt EB, Hershey GKK, Ji H. TET1 contributes to allergic airway inflammation and regulates interferon and aryl hydrocarbon receptor signaling pathways in bronchial epithelial cells. Sci Rep 2019; 9:7361. [PMID: 31089182 PMCID: PMC6517446 DOI: 10.1038/s41598-019-43767-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 05/01/2019] [Indexed: 01/10/2023] Open
Abstract
Previous studies have suggested a role for Tet1 in the pathogenesis of childhood asthma. However, how Tet1 contributes to asthma remains unknown. Here we used mice deficient for Tet1 in a well-established model of allergic airway inflammation and demonstrated that loss of Tet1 increased disease severity including airway hyperresponsiveness and lung eosinophilia. Increased expression of Muc5ac, Il13, Il33, Il17a, Egfr, and Tff2 were observed in HDM-challenged Tet1-deficient mice compared to Tet1+/+ littermates. Further, transcriptomic analysis of lung RNA followed by pathway and protein network analysis showed that the IFN signaling pathway was significantly upregulated and the aryl hydrocarbon receptor (AhR) pathway was significantly downregulated in HDM-challenged Tet1-/- mice. This transcriptional regulation of the IFN and AhR pathways by Tet1 was also present in human bronchial epithelial cells at base line and following HDM challenges. Genes in these pathways were further associated with changes in DNA methylation, predicted binding of transcriptional factors with relevant functions in their promoters, and the presence of histone marks generated by histone enzymes that are known to interact with Tet1. Collectively, our data suggest that Tet1 inhibits HDM-induced allergic airway inflammation by direct regulation of the IFN and AhR pathways.
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Affiliation(s)
- J D Burleson
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Dylan Siniard
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Pyrosequencing lab for genomic and epigenomic research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Veda K Yadagiri
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Xiaoting Chen
- Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Matthew T Weirauch
- Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Divisions of Biomedical Informatics and Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Brandy P Ruff
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Eric B Brandt
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Gurjit K Khurana Hershey
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Hong Ji
- Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. .,Pyrosequencing lab for genomic and epigenomic research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. .,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA. .,Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California, Davis, CA, USA. .,California National Primate Research Center, Davis, CA, USA.
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184
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Sterile Lung Inflammation Induced by Silica Exacerbates Mycobacterium tuberculosis Infection via STING-Dependent Type 2 Immunity. Cell Rep 2019; 27:2649-2664.e5. [DOI: 10.1016/j.celrep.2019.04.110] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/17/2019] [Accepted: 04/26/2019] [Indexed: 12/18/2022] Open
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185
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186
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Neutrophil extracellular traps in the central nervous system hinder bacterial clearance during pneumococcal meningitis. Nat Commun 2019; 10:1667. [PMID: 30971685 PMCID: PMC6458182 DOI: 10.1038/s41467-019-09040-0] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 02/12/2019] [Indexed: 01/05/2023] Open
Abstract
Neutrophils are crucial mediators of host defense that are recruited to the central nervous system (CNS) in large numbers during acute bacterial meningitis caused by Streptococcus pneumoniae. Neutrophils release neutrophil extracellular traps (NETs) during infections to trap and kill bacteria. Intact NETs are fibrous structures composed of decondensed DNA and neutrophil-derived antimicrobial proteins. Here we show NETs in the cerebrospinal fluid (CSF) of patients with pneumococcal meningitis, and their absence in other forms of meningitis with neutrophil influx into the CSF caused by viruses, Borrelia and subarachnoid hemorrhage. In a rat model of meningitis, a clinical strain of pneumococci induced NET formation in the CSF. Disrupting NETs using DNase I significantly reduces bacterial load, demonstrating that NETs contribute to pneumococcal meningitis pathogenesis in vivo. We conclude that NETs in the CNS reduce bacterial clearance and degrading NETs using DNase I may have significant therapeutic implications. Neutrophils play critical roles in the host response to bacteria, including the production neutrophil extracellular traps (NET). Here the authors show that NET formation in the context of pneumococcal meningitis impairs bacterial clearance and targeting NET formation in this context could be a potential therapeutic option.
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187
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Huston DP. Unneutral neutrophils in patients with late-phase allergic reactions. J Allergy Clin Immunol 2019; 144:46-48. [PMID: 30959061 DOI: 10.1016/j.jaci.2019.03.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 03/27/2019] [Accepted: 03/29/2019] [Indexed: 11/26/2022]
Affiliation(s)
- David P Huston
- Clinical Science and Translational Research Institute, Texas A&M University Health Science Center College of Medicine, and the Immunology Center at Houston Methodist Hospital and Research Institute, Houston, Tex.
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188
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Shao S, Fang H, Dang E, Xue K, Zhang J, Li B, Qiao H, Cao T, Zhuang Y, Shen S, Zhang T, Qiao P, Li C, Gudjonsson JE, Wang G. Neutrophil Extracellular Traps Promote Inflammatory Responses in Psoriasis via Activating Epidermal TLR4/IL-36R Crosstalk. Front Immunol 2019; 10:746. [PMID: 31024570 PMCID: PMC6460719 DOI: 10.3389/fimmu.2019.00746] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 03/19/2019] [Indexed: 12/13/2022] Open
Abstract
Epidermal infiltration of neutrophils is a hallmark of psoriasis, where their activation leads to release of neutrophil extracellular traps (NETs). The contribution of NETs to psoriasis pathogenesis has been unclear, but here we demonstrate that NETs drive inflammatory responses in skin through activation of epidermal TLR4/IL-36R crosstalk. This activation is dependent upon NETs formation and integrity, as targeting NETs with DNase I or CI-amidine in vivo improves disease in the imiquimod (IMQ)-induced psoriasis-like mouse model, decreasing IL-17A, lipocalin2 (LCN2), and IL-36G expression. Proinflammatory activity of NETs, and LCN2 induction, is dependent upon activation of TLR4/IL-36R crosstalk and MyD88/nuclear factor-kappa B (NF-κB) down-stream signaling, but independent of TLR7 or TLR9. Notably, both TLR4 inhibition and LCN2 neutralization alleviate psoriasis-like inflammation and NETs formation in both the IMQ model and K14-VEGF transgenic mice. In summary, these results outline the mechanisms for the proinflammatory activity of NETs in skin and identify NETs/TLR4 as novel therapeutic targets in psoriasis.
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Affiliation(s)
- Shuai Shao
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Hui Fang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Erle Dang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Ke Xue
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Jieyu Zhang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Bing Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Hongjiang Qiao
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Tianyu Cao
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Yuchen Zhuang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Shengxian Shen
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Tongmei Zhang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Pei Qiao
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Caixia Li
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Johann E Gudjonsson
- Department of Dermatology, University of Michigan, Ann Arbor, MI, United States
| | - Gang Wang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
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189
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Scozzi D, Wang X, Liao F, Liu Z, Zhu J, Pugh K, Ibrahim M, Hsiao HM, Miller MJ, Yizhan G, Mohanakumar T, Krupnick AS, Kreisel D, Gelman AE. Neutrophil extracellular trap fragments stimulate innate immune responses that prevent lung transplant tolerance. Am J Transplant 2019; 19:1011-1023. [PMID: 30378766 PMCID: PMC6438629 DOI: 10.1111/ajt.15163] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 10/03/2018] [Accepted: 10/21/2018] [Indexed: 01/25/2023]
Abstract
Neutrophil extracellular traps (NETs) have been shown to worsen acute pulmonary injury including after lung transplantation. The breakdown of NETs by DNAse-1 can help restore lung function, but whether there is an impact on allograft tolerance remains less clear. Using intravital 2-photon microscopy, we analyzed the effects of DNAse-1 on NETs in mouse orthotopic lung allografts damaged by ischemia-reperfusion injury. Although DNAse-1 treatment rapidly degrades intragraft NETs, the consequential release of NET fragments induces prolonged interactions between infiltrating CD4+ T cells and donor-derived antigen presenting cells. DNAse-1 generated NET fragments also promote human alveolar macrophage inflammatory cytokine production and prime dendritic cells for alloantigen-specific CD4+ T cell proliferation through activating toll-like receptor (TLR) - Myeloid Differentiation Primary Response 88 (MyD88) signaling pathways. Furthermore, and in contrast to allograft recipients with a deficiency in NET generation due to a neutrophil-specific ablation of Protein Arginine Deiminase 4 (PAD4), DNAse-1 administration to wild-type recipients promotes the recognition of allo- and self-antigens and prevents immunosuppression-mediated lung allograft acceptance through a MyD88-dependent pathway. Taken together, these data show that the rapid catalytic release of NET fragments promotes innate immune responses that prevent lung transplant tolerance.
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Affiliation(s)
- Davide Scozzi
- Department of Surgery, Washington University School of
Medicine, St. Louis, MO. USA
| | - Xingan Wang
- Department of Surgery, Washington University School of
Medicine, St. Louis, MO. USA
| | - Fuyi Liao
- Department of Surgery, Washington University School of
Medicine, St. Louis, MO. USA
| | - Zhiyi Liu
- Department of Surgery, Washington University School of
Medicine, St. Louis, MO. USA
| | - Jihong Zhu
- Department of Surgery, Washington University School of
Medicine, St. Louis, MO. USA
| | - Katy Pugh
- Department of Surgery, Washington University School of
Medicine, St. Louis, MO. USA
| | - Mohsen Ibrahim
- Department of Surgery, Washington University School of
Medicine, St. Louis, MO. USA
| | - Hsi-Min Hsiao
- Department of Surgery, Washington University School of
Medicine, St. Louis, MO. USA
| | - Mark J. Miller
- Department of Medicine, Washington University School of
Medicine, St. Louis, MO. USA
| | - Guo Yizhan
- Department of Surgery, University of Virginia,
Charlottesville VA. USA
| | - Thalachallour Mohanakumar
- Norton Thoracic Institute Research Laboratory, St.
Joseph’s Hospital and Medical Center, Phoenix, AZ. USA
| | | | - Daniel Kreisel
- Department of Surgery, Washington University School of
Medicine, St. Louis, MO. USA,Department of Pathology & Immunology, Washington
University School of Medicine, St. Louis, MO. USA
| | - Andrew E. Gelman
- Department of Surgery, Washington University School of
Medicine, St. Louis, MO. USA,Department of Pathology & Immunology, Washington
University School of Medicine, St. Louis, MO. USA
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190
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Non-type 2 inflammation in severe asthma is propelled by neutrophil cytoplasts and maintained by defective resolution. Allergol Int 2019; 68:143-149. [PMID: 30573389 DOI: 10.1016/j.alit.2018.11.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 11/10/2018] [Accepted: 11/12/2018] [Indexed: 12/31/2022] Open
Abstract
Asthma is a highly prevalent heterogeneous inflammatory disorder of the airways. Not all patients respond to anti-inflammatory treatment with corticosteroids, leading to significant morbidity in severe asthma. Much attention has been paid to defining the cellular and molecular mechanisms of type 2 inflammation that are operative in asthma. Development of targeted therapies for pathologic type 2 inflammation is opening a new approach to asthma treatment; however, not all asthmatics have type 2 airway inflammation, especially those with severe corticosteroid-refractory asthma. Much less is known about non-type 2 immunological mechanisms in asthma. In health, inflammation triggers resolution mechanisms that control immune (type 1 and type 2) responses and enable the restoration of tissue homeostasis. The resolution response is comprised of cellular and molecular events, including production of specialized pro-resolving mediators (SPMs). SPMs halt leukocyte recruitment, promote macrophage efferocytosis, and restore epithelial barrier integrity, all of which are critical to resolution of inflammation in the lungs. Here, we review recent insights into the disruption of these homeostatic mechanisms and their contributions to non-type 2 inflammation in severe asthma immunopathogenesis.
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191
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Wills-Karp M. Neutrophil ghosts worsen asthma. Sci Immunol 2019; 3:3/26/eaau0112. [PMID: 30076282 DOI: 10.1126/sciimmunol.aau0112] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 07/07/2018] [Indexed: 12/21/2022]
Abstract
Neutrophil cytoplasts are linked to amplification of T helper 17-mediated inflammation and severe asthma.
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Affiliation(s)
- Marsha Wills-Karp
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA.
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192
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Xu K, Cooney KA, Shin EY, Wang L, Deppen JN, Ginn SC, Levit RD. Adenosine from a biologic source regulates neutrophil extracellular traps (NETs). J Leukoc Biol 2019; 105:1225-1234. [PMID: 30907983 DOI: 10.1002/jlb.3vma0918-374r] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 02/01/2019] [Accepted: 02/25/2019] [Indexed: 01/27/2023] Open
Abstract
Neutrophil extracellular traps (NETs) are implicated in autoimmune, thrombotic, malignant, and inflammatory diseases; however, little is known of their endogenous regulation under basal conditions. Inflammatory effects of neutrophils are modulated by extracellular purines such as adenosine (ADO) that is inhibitory or ATP that generally up-regulates effector functions. In order to evaluate the effects of ADO on NETs, human neutrophils were isolated from peripheral venous blood from healthy donors and stimulated to make NETs. Treatment with ADO inhibited NET production as quantified by 2 methods: SYTOX green fluorescence and human neutrophil elastase (HNE)-DNA ELISA assay. Specific ADO receptor agonist and antagonist were tested for their effects on NET production. The ADO 2A receptor (A2A R) agonist CSG21680 inhibited NETs to a similar degree as ADO, whereas the A2A R antagonist ZM241385 prevented ADO's NET-inhibitory effects. Additionally, CD73 is a membrane bound ectonucleotidase expressed on mesenchymal stromal cells (MSCs) that allows manipulation of extracellular purines in tissues such as bone marrow. The effects of MSCs on NET formation were evaluated in coculture. MSCs reduced NET formation in a CD73-dependent manner. These results imply that extracellular purine balance may locally regulate NETosis and may be actively modulated by stromal cells to maintain tissue homeostasis.
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Affiliation(s)
- Kai Xu
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Department of Cardiovascular Medicine, Xiangya Hospital, Changsha, China
| | - Kimberly A Cooney
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Eric Y Shin
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Lanfang Wang
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Juline N Deppen
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Sydney C Ginn
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Rebecca D Levit
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
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193
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Orchestration of Adaptive T Cell Responses by Neutrophil Granule Contents. Mediators Inflamm 2019; 2019:8968943. [PMID: 30983883 PMCID: PMC6431490 DOI: 10.1155/2019/8968943] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/28/2019] [Accepted: 02/06/2019] [Indexed: 01/05/2023] Open
Abstract
Neutrophils are the most abundant leukocytes in peripheral blood and respond rapidly to danger, infiltrating tissues within minutes of infectious or sterile injury. Neutrophils were long thought of as simple killers, but now we recognise them as responsive cells able to adapt to inflammation and orchestrate subsequent events with some sophistication. Here, we discuss how these rapid responders release mediators which influence later adaptive T cell immunity through influences on DC priming and directly on the T cells themselves. We consider how the release of granule contents by neutrophils—through NETosis or degranulation—is one way in which the innate immune system directs the phenotype of the adaptive immune response.
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194
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Hayun Y, Shoham Y, Krieger Y, Silberstein E, Douvdevani A, Ad-El D. Circulating cell-free DNA as a potential marker in smoke inhalation injury. Medicine (Baltimore) 2019; 98:e14863. [PMID: 30896631 PMCID: PMC6708904 DOI: 10.1097/md.0000000000014863] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Failure in evaluation of smoke inhalation injury (SII) is related to increased morbidity and mortality. Prognostic biomarkers that reflect the injury are undoubtedly needed. Cell-free DNA (CFD) concentrations are associated to the extent of tissue damage and inflammation in various pathologies. We have developed a simple assay for CFD quantification and previously found it prognostic in various pathologies including burns, lung disease, and sepsis. The aim of this study was to evaluate admission CFD as an injury severity marker in patients with SII.In a prospective study, we measured admission CFD levels in 18 SII patients and matched control subjects. Daily CFD levels were also performed in 4 hospitalized patients. Serum CFD levels were measured by our direct rapid fluorometric assay.Admission CFD levels of SII patients were significantly higher than those of healthy controls, 879 (236-3220) ng/mL vs. 339 (150-570) ng/mL, [median (range)], P < .0001. Admission CFD levels of hospitalized patients were significantly higher than those of nonhospitalized patients, 1517 (655-3220) ng/mL vs. 675 (236-1581) ng/mL, P < .05. Admission CFD positively correlated with hospitalization time (Rho = 0.578, P < .05) and was in linear correlation with CO poisoning (carboxyhemoglobin (COHb) levels, R = 0.621, P < .0001). Additionally, along with the recovery of hospitalized patients, we observed a matched reduction of CFD levels.CFD appears to be a potentially valuable marker for severity and follow-up of SII. We believe this rapid assay can help introduce the routine use of CFD measurement into daily practice.
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Affiliation(s)
- Yehiel Hayun
- Department of Plastic Surgery & Burn Unit, Rabin Medical Center, Petach-Tikva
| | - Yaron Shoham
- Department of Plastic Surgery & Burn Unit, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva
| | - Yuval Krieger
- Department of Plastic Surgery & Burn Unit, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva
| | - Eldad Silberstein
- Department of Plastic Surgery & Burn Unit, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva
| | - Amos Douvdevani
- Department of Clinical Biochemistry and Pharmacology, Soroka University Medical Center, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Dean Ad-El
- Department of Plastic Surgery & Burn Unit, Rabin Medical Center, Petach-Tikva
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195
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NLRP3 activation induced by neutrophil extracellular traps sustains inflammatory response in the diabetic wound. Clin Sci (Lond) 2019; 133:565-582. [PMID: 30626731 DOI: 10.1042/cs20180600] [Citation(s) in RCA: 102] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 12/13/2018] [Accepted: 01/08/2019] [Indexed: 01/04/2023]
Abstract
Persistent inflammatory response in the diabetic wound impairs the healing process, resulting in significant morbidity and mortality. Mounting evidence indicate that the activation of Nod-like receptor protein (NLRP) 3 inflammasome in macrophages (MΦ) contributes to the sustained inflammatory response and impaired wound healing associated with diabetes. However, the main trigger of NLRP3 inflammasome in the wounds is not known. Neutrophils, as sentinels of the innate immune system and key stimulators of MΦ, are immune cells that play the main role in the early phase of healing. Neutrophils release extracellular traps (NETs) as defense against pathogens. On the other hand, NETs induce tissue damage. NETs have been detected in the diabetic wound and implicated in the impaired healing process, but the mechanism of NETs suspend wound healing and its role in fostering inflammatory dysregulation are elusive. Here, we report that NLRP3 and NETs production are elevated in human and rat diabetic wounds. NETs overproduced in the diabetic wounds triggered NLRP3 inflammasome activation and IL-1β release in MΦ. Furthermore, NETs up-regulated NLRP3 and pro-IL-1β levels via the TLR-4/TLR-9/NF-κB signaling pathway. They also elicited the generation of reactive oxygen species, which facilitated the association between NLRP3 and thioredoxin-interacting protein, and activated the NLRP3 inflammasome. In addition, NET digestion by DNase I alleviated the activation of NLRP3 inflammasome, regulated the immune cell infiltration, and accelerated wound healing in diabetic rat model. These findings illustrate a new mechanism by which NETs contribute to the activation of NLRP3 inflammasome and sustained inflammatory response in the diabetic wound.
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196
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Impellizzieri D, Ridder F, Raeber ME, Egholm C, Woytschak J, Kolios AGA, Legler DF, Boyman O. IL-4 receptor engagement in human neutrophils impairs their migration and extracellular trap formation. J Allergy Clin Immunol 2019; 144:267-279.e4. [PMID: 30768990 DOI: 10.1016/j.jaci.2019.01.042] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 01/29/2019] [Accepted: 01/31/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND Type 2 immunity serves to resist parasitic helminths, venoms, and toxins, but the role and regulation of neutrophils during type 2 immune responses are controversial. Helminth models suggested a contribution of neutrophils to type 2 immunity, whereas neutrophils are associated with increased disease severity during type 2 inflammatory disorders, such as asthma. OBJECTIVE We sought to evaluate the effect of the prototypic type 2 cytokines IL-4 and IL-13 on human neutrophils. METHODS Human neutrophils from peripheral blood were assessed without or with IL-4 or IL-13 for (1) expression of IL-4 receptor subunits, (2) neutrophil extracellular trap (NET) formation, (3) migration toward CXCL8 in vitro and in humanized mice, and (4) CXCR1, CXCR2, and CXCR4 expression, as well as (5) in nonallergic versus allergic subjects. RESULTS Human neutrophils expressed both types of IL-4 receptors, and their stimulation through IL-4 or IL-13 diminished their ability to form NETs and migrate toward CXCL8 in vitro. Likewise, in vivo chemotaxis in NOD-scid-Il2rg-/- mice was reduced in IL-4-stimulated human neutrophils compared with control values. These effects were accompanied by downregulation of the CXCL8-binding chemokine receptors CXCR1 and CXCR2 on human neutrophils on IL-4 or IL-13 stimulation in vitro. Ex vivo analysis of neutrophils from allergic patients or exposure of neutrophils from nonallergic subjects to allergic donor serum in vitro impaired their NET formation and migration toward CXCL8, thereby mirroring IL-4/IL-13-stimulated neutrophils. CONCLUSION IL-4 receptor signaling in human neutrophils affects several neutrophil effector functions, which bears important implications for immunity in type 2 inflammatory disorders.
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Affiliation(s)
| | - Frederike Ridder
- Department of Immunology, University Hospital Zurich, Zurich, Switzerland
| | - Miro E Raeber
- Department of Immunology, University Hospital Zurich, Zurich, Switzerland
| | - Cecilie Egholm
- Department of Immunology, University Hospital Zurich, Zurich, Switzerland
| | - Janine Woytschak
- Department of Immunology, University Hospital Zurich, Zurich, Switzerland
| | | | - Daniel F Legler
- Biotechnology Institute Thurgau (BITg) at the University of Konstanz, Kreuzlingen, Switzerland
| | - Onur Boyman
- Department of Immunology, University Hospital Zurich, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland.
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197
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Uddin M, Watz H, Malmgren A, Pedersen F. NETopathic Inflammation in Chronic Obstructive Pulmonary Disease and Severe Asthma. Front Immunol 2019; 10:47. [PMID: 30804927 PMCID: PMC6370641 DOI: 10.3389/fimmu.2019.00047] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 01/09/2019] [Indexed: 01/13/2023] Open
Abstract
Neutrophils play a central role in innate immunity, inflammation, and resolution. Unresolving neutrophilia features as a disrupted inflammatory process in the airways of patients with chronic obstructive pulmonary disease (COPD) and severe asthma. The extent to which this may be linked to disease pathobiology remains obscure and could be further confounded by indication of glucocorticoids or concomitant respiratory infections. The formation of neutrophil extracellular traps (NETs) represents a specialized host defense mechanism that entrap and eliminate invading microbes. NETs are web-like scaffolds of extracellular DNA in complex with histones and neutrophil granular proteins, such as myeloperoxidase and neutrophil elastase. Distinct from apoptosis, NET formation is an active form of cell death that could be triggered by various microbial, inflammatory, and endogenous or exogenous stimuli. NETs are reportedly enriched in neutrophil-dominant refractory lung diseases, such as COPD and severe asthma. Evidence for a pathogenic role for respiratory viruses (e.g., Rhinovirus), bacteria (e.g., Staphylococcus aureus) and fungi (e.g., Aspergillus fumigatus) in NET induction is emerging. Dysregulation of this process may exert localized NET burden and contribute to NETopathic lung inflammation. Disentangling the role of NETs in human health and disease offer unique opportunities for therapeutic modulation. The chemokine CXCR2 receptor regulates neutrophil activation and migration, and small molecule CXCR2 antagonists (e.g., AZD5069, danirixin) have been developed to selectively block neutrophilic inflammatory pathways. NET-stabilizing agents using CXCR2 antagonists are being investigated in proof-of-concept studies in patients with COPD to provide mechanistic insights. Clinical validation of this type could lead to novel therapeutics for multiple CXCR2-related NETopathologies. In this Review, we discuss the emerging role of NETs in the clinicopathobiology of COPD and severe asthma and provide an outlook on how novel NET-stabilizing therapies via CXCR2 blockade could be leveraged to disrupt NETopathic inflammation in disease-specific phenotypes.
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Affiliation(s)
- Mohib Uddin
- Respiratory Global Medicines Development, AstraZeneca, Gothenburg, Sweden.,Respiratory, Inflammation and Autoimmunity, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Henrik Watz
- Pulmonary Research Institute at LungenClinic, Großhansdorf, Germany.,Airway Research Center North (ARCN), German Center for Lung Research (DZL), Großhansdorf, Germany
| | - Anna Malmgren
- Respiratory, Inflammation and Autoimmunity, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Frauke Pedersen
- Pulmonary Research Institute at LungenClinic, Großhansdorf, Germany.,Airway Research Center North (ARCN), German Center for Lung Research (DZL), Großhansdorf, Germany.,LungenClinic, Großhansdorf, Germany
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198
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Weckbach LT, Grabmaier U, Uhl A, Gess S, Boehm F, Zehrer A, Pick R, Salvermoser M, Czermak T, Pircher J, Sorrelle N, Migliorini M, Strickland DK, Klingel K, Brinkmann V, Abu Abed U, Eriksson U, Massberg S, Brunner S, Walzog B. Midkine drives cardiac inflammation by promoting neutrophil trafficking and NETosis in myocarditis. J Exp Med 2019; 216:350-368. [PMID: 30647120 PMCID: PMC6363424 DOI: 10.1084/jem.20181102] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 10/21/2018] [Accepted: 12/20/2018] [Indexed: 12/22/2022] Open
Abstract
Heart failure due to dilated cardiomyopathy is frequently caused by myocarditis. However, the pathogenesis of myocarditis remains incompletely understood. Here, we report the presence of neutrophil extracellular traps (NETs) in cardiac tissue of patients and mice with myocarditis. Inhibition of NET formation in experimental autoimmune myocarditis (EAM) of mice substantially reduces inflammation in the acute phase of the disease. Targeting the cytokine midkine (MK), which mediates NET formation in vitro, not only attenuates NET formation in vivo and the infiltration of polymorphonuclear neutrophils (PMNs) but also reduces fibrosis and preserves systolic function during EAM. Low-density lipoprotein receptor-related protein 1 (LRP1) acts as the functionally relevant receptor for MK-induced PMN recruitment as well as NET formation. In summary, NETosis substantially contributes to the pathogenesis of myocarditis and drives cardiac inflammation, probably via MK, which promotes PMN trafficking and NETosis. Thus, MK as well as NETs may represent novel therapeutic targets for the treatment of cardiac inflammation.
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Affiliation(s)
- Ludwig T Weckbach
- Medizinische Klinik und Poliklinik I, Klinikum der Universität, Ludwig-Maximilians-University Munich, Munich, Germany .,Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany.,Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany.,German Center for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Ulrich Grabmaier
- Medizinische Klinik und Poliklinik I, Klinikum der Universität, Ludwig-Maximilians-University Munich, Munich, Germany.,German Center for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Andreas Uhl
- Medizinische Klinik und Poliklinik I, Klinikum der Universität, Ludwig-Maximilians-University Munich, Munich, Germany.,Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany.,Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
| | - Sebastian Gess
- Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany.,Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
| | - Felicitas Boehm
- Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany.,Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
| | - Annette Zehrer
- Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany.,Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
| | - Robert Pick
- Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany.,Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
| | - Melanie Salvermoser
- Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany.,Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
| | - Thomas Czermak
- Medizinische Klinik und Poliklinik I, Klinikum der Universität, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Joachim Pircher
- Medizinische Klinik und Poliklinik I, Klinikum der Universität, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Noah Sorrelle
- Hamon Center for Therapeutic Oncology Research, Division of Surgical Oncology, Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX
| | - Mary Migliorini
- Center for Vascular and Inflammatory Disease, Departments of Surgery and Physiology, University of Maryland School of Medicine, Baltimore, MD
| | - Dudley K Strickland
- Center for Vascular and Inflammatory Disease, Departments of Surgery and Physiology, University of Maryland School of Medicine, Baltimore, MD
| | - Karin Klingel
- Cardiopathology, Institute for Pathology and Neuropathology, University Hospital Tuebingen, Tuebingen, Germany
| | - Volker Brinkmann
- Microscopy Core Facility, Max Planck Institute for Infection Biology, Berlin, Germany.,Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Ulrike Abu Abed
- Microscopy Core Facility, Max Planck Institute for Infection Biology, Berlin, Germany.,Department of Cellular Microbiology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Urs Eriksson
- Cardioimmunology, Center for Molecular Cardiology, University of Zurich, Zurich, Switzerland.,Department of Medicine, Gesundheitsversorgung Zürcher Oberland-Zurich Regional Health Center, Wetzikon, Switzerland
| | - Steffen Massberg
- Medizinische Klinik und Poliklinik I, Klinikum der Universität, Ludwig-Maximilians-University Munich, Munich, Germany.,German Center for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany
| | - Stefan Brunner
- Medizinische Klinik und Poliklinik I, Klinikum der Universität, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Barbara Walzog
- Walter Brendel Centre of Experimental Medicine, University Hospital, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany .,Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
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199
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Opasawatchai A, Amornsupawat P, Jiravejchakul N, Chan-In W, Spoerk NJ, Manopwisedjaroen K, Singhasivanon P, Yingtaweesak T, Suraamornkul S, Mongkolsapaya J, Sakuntabhai A, Matangkasombut P, Loison F. Neutrophil Activation and Early Features of NET Formation Are Associated With Dengue Virus Infection in Human. Front Immunol 2019; 9:3007. [PMID: 30687301 PMCID: PMC6336714 DOI: 10.3389/fimmu.2018.03007] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 12/05/2018] [Indexed: 12/26/2022] Open
Abstract
The involvement of the immune system in the protection and pathology of natural dengue virus (DENV) has been extensively studied. However, despite studies that have referred to activation of neutrophils in DENV infections, the exact roles of neutrophils remain elusive. Here, we explored the phenotypic and functional responses of neutrophils in a cohort of adult dengue patients. Results indicated that during an acute DENV infection, neutrophils up-regulate CD66b expression, and produce a more robust respiratory response as compared with that in convalescent or healthy individuals; this confirmed in vivo neutrophil activation during DENV infection. Spontaneous decondensation of nuclei, an early event of neutrophil extracellular trap (NET) formation, was also markedly increased in cells isolated from DENV-infected patients during the acute phase of the infection. In vitro incubation of NETs with DENV-2 virus significantly decreased DENV infectivity. Interestingly, increased levels of NET components were found in the serum of patients with more severe disease form-dengue hemorrhagic fever (DHF), but not uncomplicated dengue fever, during the acute phase of the infection. Levels of pro-inflammatory cytokines IL-8 and TNFα were also increased in DHF patients as compared with those in healthy and DF subjects. This suggested that NETs may play dual roles during DENV infection. The increased ability for NET formation during acute DENV infection appeared to be independent of PAD4-mediated histone H3 hyper-citrullination. Our study suggests that neutrophils are involved in immunological responses to DENV infection.
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Affiliation(s)
- Anunya Opasawatchai
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand.,Faculty of Dentistry, Mahidol University, Bangkok, Thailand.,Systems Biology of Diseases Research Unit, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Panicha Amornsupawat
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | | | - Wilawan Chan-In
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand.,Department of Clinical Pathology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok, Thailand
| | - Nicholas J Spoerk
- Department of Bacteriology, College of Agricultural and Life Sciences, University of Wisconsin-Madison, Madison, WI, United States
| | | | - Pratap Singhasivanon
- Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | | | - Juthathip Mongkolsapaya
- Department of Medicine, Imperial College London, London, United Kingdom.,Dengue Hemorrhagic Fever Research Unit, Office for Research and Development, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Anavaj Sakuntabhai
- Functional Genetics of Infectious Diseases Unit, Institut Pasteur, Paris, France.,Centre National de la Recherche Scientifique (CNRS), URA3012, Paris, France
| | - Ponpan Matangkasombut
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand.,Systems Biology of Diseases Research Unit, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Fabien Loison
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand.,Systems Biology of Diseases Research Unit, Faculty of Science, Mahidol University, Bangkok, Thailand
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200
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Abstract
Respiratory viral infections including human rhinovirus (RV) infection have been identified as the most important environmental trigger of exacerbations of chronic lung diseases. While well established as the most common viral infections associated with exacerbations of asthma and chronic obstructive pulmonary disease, RVs and other respiratory viruses are also now thought to be important in triggering exacerbations of cystic fibrosis and the interstitial lung diseases. Here, we summarize the epidemiological evidence the supports respiratory viruses including RV as triggers of exacerbations of chronic lung diseases. We propose that certain characteristics of RVs may explain why they are the most common trigger of exacerbations of chronic lung diseases. We further highlight the latest mechanistic evidence supporting how and why common respiratory viral infections may enhance and promote disease triggering exacerbation events, through their interactions with the host immune system, and may be affected by ongoing treatments. We also provide a commentary on how new treatments may better manage the disease burden associated with respiratory viral infections and the exacerbation events that they trigger.
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