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Sang L, Gong X, Huang Y, Zhang L, Sun J. Immunotherapeutic implications on targeting the cytokines produced in rhinovirus-induced immunoreactions. FRONTIERS IN ALLERGY 2024; 5:1427762. [PMID: 38859875 PMCID: PMC11163110 DOI: 10.3389/falgy.2024.1427762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Accepted: 05/13/2024] [Indexed: 06/12/2024] Open
Abstract
Rhinovirus is a widespread virus associated with several respiratory diseases, especially asthma exacerbation. Currently, there are no accurate therapies for rhinovirus. Encouragingly, it is found that during rhinovirus-induced immunoreactions the levels of certain cytokines in patients' serum will alter. These cytokines may have pivotal pro-inflammatory or anti-inflammatory effects via their specific mechanisms. Thus far, studies have shown that inhibitions of cytokines such as IL-1, IL-4, IL-5, IL-6, IL-13, IL-18, IL-25, and IL-33 may attenuate rhinovirus-induced immunoreactions, thereby relieving rhinovirus infection. Furthermore, such therapeutics for rhinovirus infection can be applied to viruses of other species, with certain practicability.
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Affiliation(s)
- Le Sang
- Department of Medicine, Shaoxing University, Shaoxing City, Zhejiang Province, China
| | - Xia Gong
- Department of Medicine, Shaoxing University, Shaoxing City, Zhejiang Province, China
| | - Yunlei Huang
- Department of Medicine, Shaoxing University, Shaoxing City, Zhejiang Province, China
| | - Linling Zhang
- Department of Respiratory Medicine, Shaoxing People’s Hospital, Shaoxing City, Zhejiang Province, China
| | - Jian Sun
- Department of Respiratory Medicine, Shaoxing People’s Hospital, Shaoxing City, Zhejiang Province, China
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2
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Brister DL, Omer H, Whetstone CE, Ranjbar M, Gauvreau GM. Multifactorial Causes and Consequences of TLSP Production, Function, and Release in the Asthmatic Airway. Biomolecules 2024; 14:401. [PMID: 38672419 PMCID: PMC11048646 DOI: 10.3390/biom14040401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 04/28/2024] Open
Abstract
Disruption of the airway epithelium triggers a defensive immune response that begins with the production and release of alarmin cytokines. These epithelial-derived alarmin cytokines, including thymic stromal lymphopoietin (TSLP), are produced in response to aeroallergens, viruses, and toxic inhalants. An alarmin response disproportionate to the inhaled trigger can exacerbate airway diseases such as asthma. Allergens inhaled into previously sensitized airways are known to drive a T2 inflammatory response through the polarization of T cells by dendritic cells mediated by TSLP. Harmful compounds found within air pollution, microbes, and viruses are also triggers causing airway epithelial cell release of TSLP in asthmatic airways. The release of TSLP leads to the development of inflammation which, when unchecked, can result in asthma exacerbations. Genetic and inheritable factors can contribute to the variable expression of TSLP and the risk and severity of asthma. This paper will review the various triggers and consequences of TSLP release in asthmatic airways.
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Affiliation(s)
| | | | | | | | - Gail M. Gauvreau
- Division of Respirology, Department of Medicine, McMaster University, Hamilton, ON L8N 3Z5, Canada; (D.L.B.); (H.O.); (C.E.W.); (M.R.)
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3
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Sverrild A, Cerps S, Nieto-Fontarigo JJ, Ramu S, Hvidtfeldt M, Menzel M, Kearley J, Griffiths JM, Parnes JR, Porsbjerg C, Uller L. Tezepelumab decreases airway epithelial IL-33 and T2-inflammation in response to viral stimulation in patients with asthma. Allergy 2024; 79:656-666. [PMID: 37846599 DOI: 10.1111/all.15918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 09/04/2023] [Accepted: 09/21/2023] [Indexed: 10/18/2023]
Abstract
BACKGROUND Respiratory virus infections are main triggers of asthma exacerbations. Tezepelumab, an anti-TSLP mAb, reduces exacerbations in patients with asthma, but the effect of blocking TSLP on host epithelial resistance and tolerance to virus infection is not known. AIM To examine effects of blocking TSLP in patients with asthma on host resistance (IFNβ, IFNλ, and viral load) and on the airway epithelial inflammatory response to viral challenge. METHODS Bronchoalveolar lavage fluid (BALF, n = 39) and bronchial epithelial cells (BECs) were obtained from patients with uncontrolled asthma before and after 12 weeks of tezepelumab treatment (n = 13) or placebo (n = 13). BECs were cultured in vitro and exposed to the viral infection mimic poly(I:C) or infected by rhinovirus (RV). Alarmins, T2- and pro-inflammatory cytokines, IFNβ IFNλ, and viral load were analyzed by RT-qPCR and multiplex ELISA before and after stimulation. RESULTS IL-33 expression in unstimulated BECs and IL-33 protein levels in BALF were reduced after 12 weeks of tezepelumab. Further, IL-33 gene and protein levels decreased in BECs challenged with poly(I:C) after tezepelumab whereas TSLP gene expression remained unaffected. Poly(I:C)-induced IL-4, IL-13, and IL-17A release from BECs was also reduced with tezepelumab whereas IFNβ and IFNλ expression and viral load were unchanged. CONCLUSION Blocking TSLP with tezepelumab in vivo in asthma reduced the airway epithelial inflammatory response including IL-33 and T2 cytokines to viral challenge without affecting anti-viral host resistance. Our results suggest that blocking TSLP stabilizes the bronchial epithelial immune response to respiratory viruses.
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Affiliation(s)
- A Sverrild
- Department of Respiratory Medicine, University Hospital Bispebjerg, Copenhagen, Denmark
| | - S Cerps
- Department of Experimental Medicine, Lund University, Lund, Sweden
| | - J J Nieto-Fontarigo
- Department of Experimental Medicine, Lund University, Lund, Sweden
- BioLympho Research group, Department of Biochemistry and Molecular Biology, Faculty of Biology-Biological Research Centre (CIBUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
- Translational Research in Airway Diseases Group (TRIAD), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - S Ramu
- Department of Experimental Medicine, Lund University, Lund, Sweden
| | - M Hvidtfeldt
- Department of Respiratory Medicine, University Hospital Bispebjerg, Copenhagen, Denmark
| | - M Menzel
- Department of Experimental Medicine, Lund University, Lund, Sweden
| | - J Kearley
- Bioscience, Research & Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - J M Griffiths
- Translational Science and Experimental Medicine, Research & Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, Maryland, USA
| | - J R Parnes
- Translational Medicine, Amgen, Thousand Oaks, California, USA
| | - C Porsbjerg
- Department of Respiratory Medicine, University Hospital Bispebjerg, Copenhagen, Denmark
| | - L Uller
- Department of Experimental Medicine, Lund University, Lund, Sweden
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4
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Assaf S, Stenberg H, Jesenak M, Tarasevych SP, Hanania NA, Diamant Z. Asthma in the era of COVID-19. Respir Med 2023; 218:107373. [PMID: 37567514 DOI: 10.1016/j.rmed.2023.107373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 08/13/2023]
Abstract
Since its global invasion in 2019, COVID-19 has affected several aspects of patients' lives and posed a significant impact on the health care system. Several patient populations were identified to be at high risk of contracting SARS-CoV-2 infection and/or developing severe COVID-19-related sequelae. Conversely, anyone who has contracted SARS-CoV-2 is at risk to experience symptoms and signs consistent with post-COVID manifestations. Patients with asthma were initially thought to be at increased risk and severity for SARS-CoV-2 infection. However, accumulating evidence demonstrates that asthma endotypes/phenotypes and comorbidities influence the risk stratification in this population. Furthermore, initial concerns about the potentially increased risk of poor outcomes with asthma treatments such as inhaled corticosteroids and biologics have not been substantiated. In this review, we provide an update on COVID-19 and asthma, including risk of susceptibility, clinical manifestations and course in this population as well as discuss recommendations for management.
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Affiliation(s)
- Sara Assaf
- Section of Pulmonary and Critical Care Medicine, University of New Mexico, Albuquerque, NM, USA.
| | - Henning Stenberg
- Center for Primary Health Care Research, Lund University, Malmö, Sweden
| | - Milos Jesenak
- Departments of Pulmonology and Phthisiology and Paediatrics, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Department of Clinical Immunology and Allergology, University Teaching Hospital in Martin, Martin, Slovak Republic
| | | | - Nicola A Hanania
- Section of Pulmonary and Critical Care Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Zuzana Diamant
- Dept of Microbiology Immunology & Transplantation, KU Leuven, Catholic University of Leuven, Belgium; Dept of Respiratory Medicine & Allergology, Institute for Clinical Science, Skane University Hospital, Lund University, Lund, Sweden; Department of Respiratory Medicine, First Faculty of Medicine, Charles University and Thomayer Hospital, Prague, Czech Republic; Dept Clin Pharm & Pharmacol, Univ Groningen, Univ Med Ctr Groningen, Groningen, Netherlands.
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5
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Berlin F, Mogren S, Ly C, Ramu S, Hvidtfeldt M, Uller L, Porsbjerg C, Andersson CK. Mast Cell Tryptase Promotes Airway Remodeling by Inducing Anti-Apoptotic and Cell Growth Properties in Human Alveolar and Bronchial Epithelial Cells. Cells 2023; 12:1439. [PMID: 37408273 DOI: 10.3390/cells12101439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 05/12/2023] [Accepted: 05/18/2023] [Indexed: 07/07/2023] Open
Abstract
Bronchial and alveolar remodeling and impaired epithelial function are characteristics of chronic respiratory diseases. In these patients, an increased number of mast cells (MCs) positive for serine proteases, tryptase and chymase, infiltrate the epithelium and alveolar parenchyma. However, little is known regarding the implication of intraepithelial MCs on the local environment, such as epithelial cell function and properties. In this study, we investigated whether MC tryptase is involved in bronchial and alveolar remodeling and the mechanisms of regulation during inflammation. Using novel holographic live cell imaging, we found that MC tryptase enhanced human bronchial and alveolar epithelial cell growth and shortened the cell division intervals. The elevated cell growth induced by tryptase remained in a pro-inflammatory state. Tryptase also increased the expression of the anti-apoptotic protein BIRC3, as well as growth factor release in epithelial cells. Thus, our data imply that the intraepithelial and alveolar MC release of tryptase may play a critical role in disturbing bronchial epithelial and alveolar homeostasis by altering cell growth-death regulation.
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Affiliation(s)
- Frida Berlin
- Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden
| | - Sofia Mogren
- Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden
| | - Camilla Ly
- Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden
| | - Sangeetha Ramu
- Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden
| | - Morten Hvidtfeldt
- Department of Respiratory Medicine, Copenhagen University Hospital Bispebjerg, 2400 Copenhagen, Denmark
| | - Lena Uller
- Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden
| | - Celeste Porsbjerg
- Department of Respiratory Medicine, Copenhagen University Hospital Bispebjerg, 2400 Copenhagen, Denmark
| | - Cecilia K Andersson
- Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden
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6
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Woehlk C, Von Bülow A, Ghanizada M, Søndergaard MB, Hansen S, Porsbjerg C. Allergen immunotherapy effectively reduces the risk of exacerbations and lower respiratory tract infections in both seasonal and perennial allergic asthma: a nationwide epidemiological study. Eur Respir J 2022; 60:13993003.00446-2022. [PMID: 35618279 DOI: 10.1183/13993003.00446-2022] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 05/10/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND Allergic asthma is associated with increased risk of respiratory tract infections and exacerbations. It remains unclear whether this susceptibility is conditioned by seasonal or by perennial allergy. AIM To investigate perennial allergy compared with seasonal allergy as a risk factor for lower respiratory tract infections and exacerbations in asthma and whether this risk can be reduced by allergen immunotherapy (AIT). METHODOLOGY This is a prospective register-based nationwide study of 18-44-year-olds treated with AIT during 1995-2014. Based on the type of AIT and use of anti-asthmatic drugs, patients were subdivided into two groups: perennial allergic asthma (PAA) versus seasonal allergic asthma (SAA). Data on antibiotics against lower respiratory tract infections (LRTI) and oral corticosteroids for exacerbations were analysed before starting AIT (baseline) and 3 years after completing AIT (follow-up). RESULTS We identified 2688 patients with asthma treated with AIT, of whom 1249 had PAA and 1439 had SAA. At baseline, patients with SAA had more exacerbations (23.8% versus 16.5%, p≤0.001), but there were no differences in LRTI. During the 3-year follow-up, we observed a highly significant reduction of exacerbations with an average decrease of 57% in PAA and 74% in SAA. In addition, we observed a significant reduction of LRTI in both PAA and SAA: 17% and 20% decrease, respectively. CONCLUSION AIT effectively reduced the risk of exacerbations and lower respiratory tract infections in both seasonal and perennial allergic asthma. Perennial allergy is seemingly not a stronger risk factor for respiratory infections and exacerbations than seasonal allergy.
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Affiliation(s)
- Christian Woehlk
- Respiratory Research Unit, Dept Respiratory Medicine, Copenhagen, Denmark
| | - Anna Von Bülow
- Respiratory Research Unit, Dept Respiratory Medicine, Copenhagen, Denmark
| | - Muzhda Ghanizada
- Respiratory Research Unit, Dept Respiratory Medicine, Copenhagen, Denmark
| | | | - Susanne Hansen
- Respiratory Research Unit, Dept Respiratory Medicine, Copenhagen, Denmark
| | - Celeste Porsbjerg
- Respiratory Research Unit, Dept Respiratory Medicine, Copenhagen, Denmark
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Angiogenesis, Lymphangiogenesis, and Inflammation in Chronic Obstructive Pulmonary Disease (COPD): Few Certainties and Many Outstanding Questions. Cells 2022; 11:cells11101720. [PMID: 35626756 PMCID: PMC9139415 DOI: 10.3390/cells11101720] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/20/2022] [Accepted: 05/21/2022] [Indexed: 02/07/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is characterized by chronic inflammation, predominantly affecting the lung parenchyma and peripheral airways, that results in progressive and irreversible airflow obstruction. COPD development is promoted by persistent pulmonary inflammation in response to several stimuli (e.g., cigarette smoke, bacterial and viral infections, air pollution, etc.). Angiogenesis, the formation of new blood vessels, and lymphangiogenesis, the formation of new lymphatic vessels, are features of airway inflammation in COPD. There is compelling evidence that effector cells of inflammation (lung-resident macrophages and mast cells and infiltrating neutrophils, eosinophils, basophils, lymphocytes, etc.) are major sources of a vast array of angiogenic (e.g., vascular endothelial growth factor-A (VEGF-A), angiopoietins) and/or lymphangiogenic factors (VEGF-C, -D). Further, structural cells, including bronchial and alveolar epithelial cells, endothelial cells, fibroblasts/myofibroblasts, and airway smooth muscle cells, can contribute to inflammation and angiogenesis in COPD. Although there is evidence that alterations of angiogenesis and, to a lesser extent, lymphangiogenesis, are associated with COPD, there are still many unanswered questions.
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8
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Cerps S, Sverrild A, Ramu S, Nieto‐Fontarigo JJ, Akbarshahi H, Menzel M, Andersson C, Tillgren S, Hvidtfeldt M, Porsbjerg C, Uller L. House dust mite sensitization and exposure affects bronchial epithelial anti-microbial response to viral stimuli in patients with asthma. Allergy 2022; 77:2498-2508. [PMID: 35114024 PMCID: PMC9546181 DOI: 10.1111/all.15243] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/22/2021] [Accepted: 01/02/2022] [Indexed: 12/01/2022]
Abstract
Introduction Allergen exposure worsens viral‐triggered asthma exacerbations and could predispose the host to secondary bacterial infections. We have previously demonstrated that exposure to house dust mite (HDM) reduced TLR‐3‐induced IFN‐β in human bronchial epithelial cells (HBECs) from healthy donors. We hypothesize that HDM sensitization in different ways may be involved in both viral and bacterial resistance of HBECs in asthma. In this study, the role of HDM sensitization and effects of HDM exposure on viral stimulus‐challenged HBECs from asthmatic donors have been explored with regard to expression and release of molecules involved in anti‐viral and anti‐bacterial responses, respectively. Methods HBECs from HDM‐sensitized (HDM+) and unsensitized (HDM‐) patients with asthma were used. HBECs were exposed to HDM or heat inactivated (hi)‐HDM (20 μg/ml) for 24 h prior to stimulation with the viral infection mimic, Poly(I:C), for 3 or 24 h. Samples were analyzed with ELISA and RT‐qPCR for β‐defensin‐2, IFN‐β, TSLP, and neutrophil‐recruiting mediators: IL‐8 and TNF‐⍺. NFκB signaling proteins p105, p65, and IκB‐⍺ were analyzed by Western blot. Results Poly(I:C)‐induced IFN‐β expression was reduced in HBECs from HDM + compared to HDM‐ patients (p = 0.05). In vitro exposure of HBECs to HDM furthermore reduced anti‐microbial responses to Poly(I:C) including β‐defensin‐2, IL‐8, and TNF‐⍺, along with reduced NFκB activity. This was observed in HBECs from asthma patients sensitized to HDM, as well as in non‐sensitized patients. By contrast, Poly (I:C)‐induced release of TSLP, a driver of T2 inflammation, was not reduced with exposure to HDM. Conclusion Using HBECs challenged with viral infection mimic, Poly(I:C), we demonstrated that allergic sensitization to HDM was associated with impaired anti‐viral immunity and that HDM exposure reduced anti‐viral and anti‐bacterial defense molecules, but not TSLP, across non‐allergic as well as allergic asthma. These data suggest a role of HDM in the pathogenesis of asthma exacerbations evoked by viral infections including sequential viral‐bacterial and viral‐viral infections.
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Affiliation(s)
- Samuel Cerps
- Department of Experimental Medical Science BMC D12 Lund University Lund Sweden
| | - Asger Sverrild
- Department of Respiratory Medicine University Hospital Bispebjerg Copenhagen Denmark
| | - Sangeetha Ramu
- Department of Experimental Medical Science BMC D12 Lund University Lund Sweden
| | | | - Hamid Akbarshahi
- Department of Experimental Medical Science BMC D12 Lund University Lund Sweden
| | - Mandy Menzel
- Department of Experimental Medical Science BMC D12 Lund University Lund Sweden
| | - Cecilia Andersson
- Department of Experimental Medical Science BMC D12 Lund University Lund Sweden
| | - Sofia Tillgren
- Department of Experimental Medical Science BMC D12 Lund University Lund Sweden
| | - Morten Hvidtfeldt
- Department of Respiratory Medicine University Hospital Bispebjerg Copenhagen Denmark
| | - Celeste Porsbjerg
- Department of Respiratory Medicine University Hospital Bispebjerg Copenhagen Denmark
| | - Lena Uller
- Department of Experimental Medical Science BMC D12 Lund University Lund Sweden
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9
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Chorvinsky E, Nino G, Salka K, Gaviria S, Gutierrez MJ, Pillai DK. TSLP bronchoalveolar lavage levels at baseline are linked to clinical disease severity and reduced lung function in children with asthma. Front Pediatr 2022; 10:971073. [PMID: 36245744 PMCID: PMC9557150 DOI: 10.3389/fped.2022.971073] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 09/05/2022] [Indexed: 11/13/2022] Open
Abstract
RATIONALE Thymic stromal lymphopoietin (TSLP) is increasingly recognized as a key molecule in asthma pathogenesis and as a promising therapeutic target in adults. In contrast, in asthmatic children the clinical relevance of TSLP secretion in the lower airways has been remarkably understudied. We tested the hypothesis that pulmonary TSLP levels in asthmatic children correlate with clinical severity, airway inflammation and lower airway obstruction. METHODS Bronchoalveolar lavage (BAL) samples and relevant clinical data were collected from asthmatic children undergoing clinically indicated bronchoscopy at Children's National Hospital in Washington D.C. Protein levels of TSLP, IL-5, IL-1β, and IL-33 were quantified in BAL at baseline and correlated with individual severity and clinical features including spirometry, serum IgE and eosinophils, BAL neutrophil and eosinophil counts. RESULTS We enrolled a total of 35 asthmatic children (median age: 9 years). Pediatric subjects with severe asthma had greater TSLP BAL levels at baseline relative to mild or moderate asthmatic subjects (p = 0.016). Asthmatic children with the highest TSLP levels (>75th percentile) had higher IL-5 and IL-1β BAL levels and greater lower airway obstruction (lower FEV1/FVC ratios). CONCLUSION Our study demonstrates for the first time that higher pulmonary TSLP levels obtained at baseline are linked to asthma disease severity in a subset of children. These data indicate that TSLP may play a key role in the pathogenesis of pediatric asthma and thus provide initial support to investigate the potential use of anti-TSLP biologics to treat severe uncontrolled asthmatic children.
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Affiliation(s)
- Elizabeth Chorvinsky
- Division of Pediatric Pulmonary and Sleep Medicine, Children's National Medical Center, George Washington University, Washington, DC, United States
| | - Gustavo Nino
- Division of Pediatric Pulmonary and Sleep Medicine, Children's National Medical Center, George Washington University, Washington, DC, United States
| | - Kyle Salka
- Division of Pediatric Pulmonary and Sleep Medicine, Children's National Medical Center, George Washington University, Washington, DC, United States
| | - Susana Gaviria
- Division of Pediatric Pulmonary and Sleep Medicine, Children's National Medical Center, George Washington University, Washington, DC, United States
| | - Maria J Gutierrez
- Division of Pediatric Allergy, Immunology and Rheumatology, Johns Hopkins University, Baltimore, MD, United States
| | - Dinesh K Pillai
- Division of Pediatric Pulmonary and Sleep Medicine, Children's National Medical Center, George Washington University, Washington, DC, United States
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Porsbjerg C, Nieto-Fontarigo JJ, Cerps S, Ramu S, Menzel M, Hvidtfeldt M, Silberbrandt A, Froessing L, Klein D, Sverrild A, Uller L. Phenotype and severity of asthma determines bronchial epithelial immune responses to a viral mimic. Eur Respir J 2021; 60:13993003.02333-2021. [PMID: 34916261 DOI: 10.1183/13993003.02333-2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 11/24/2021] [Indexed: 11/05/2022]
Abstract
BACKGROUND Asthma is characterised by an aggravated immune response to respiratory viral infections: This phenomenon is a clinically well-recognised driver of acute exacerbations, but how different phenotypes of asthma respond immunologically to virus is unclear. OBJECTIVES To describe the association between different phenotypes and severity of asthma and bronchial epithelial immune responses to viral stimulation. METHODS In the Immunoreact study, healthy subjects (n=10) and 50 patients with asthma were included; 30 (60%) were atopic, and 34 (68%) were eosinophilic; 14 (28%) had severe asthma. All participants underwent bronchoscopy with collection of bronchial brushings. Bronchial epithelial cells (BECs) were expanded and stimulated with the viral replication mimic poly (I:C) (TLR3 agonist) in vitro. The expression of TLR3-induced pro-inflammatory and anti-viral responses of BECs were analysed using RT-qPCR and multiplex ELISA and compared across asthma phenotypes and severity of disease. RESULTS Patients with atopic asthma had increased induction of IL-4, IFN-β, IL-6, TNF-α, and IL-1β after poly (I:C) stimulation compared to non-atopic patients, whereas in patients with eosinophilic asthma only IL-6 and IL-8 induction was higher than in non-eosinophilic asthma. Patients with severe asthma displayed a decreased antiviral IFN-β, and increased expression of IL-8, most pronounced in atopic and eosinophilic asthmatics. Furthermore, induction of IL-33 in response to poly (I:C) was increased in severe atopic and in severe eosinophilic asthma, but TSLP only in severe eosinophilic asthma. CONCLUSIONS The bronchial epithelial immune response to a viral mimic stimulation differs between asthma phenotypes and severities, which may be important to consider when targeting novel asthma treatments.
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Affiliation(s)
- Celeste Porsbjerg
- Respiratory Research Unit, Department of Respiratory Medicine, Bispebjerg Hospital, Copenhagen, Denmark .,Center for Translational Research, Bispebjerg Hospital, Copenhagen, Denmark.,Institute for Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.,Both authors contributed equally to the manuscript
| | - Juan Jose Nieto-Fontarigo
- Respiratory Immunopharmacology, University of Lund, Lund, Sweden.,Both authors contributed equally to the manuscript
| | - Samuel Cerps
- Respiratory Immunopharmacology, University of Lund, Lund, Sweden
| | - Sangheeta Ramu
- Respiratory Immunopharmacology, University of Lund, Lund, Sweden
| | - Mandy Menzel
- Respiratory Research Unit, Department of Respiratory Medicine, Bispebjerg Hospital, Copenhagen, Denmark.,Institute for Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.,Respiratory Immunopharmacology, University of Lund, Lund, Sweden.,Skin Immunology Research Center, University of Copenhagen, Copenhagen, Denmark
| | - Morten Hvidtfeldt
- Respiratory Research Unit, Department of Respiratory Medicine, Bispebjerg Hospital, Copenhagen, Denmark.,Center for Translational Research, Bispebjerg Hospital, Copenhagen, Denmark
| | - Alexander Silberbrandt
- Respiratory Research Unit, Department of Respiratory Medicine, Bispebjerg Hospital, Copenhagen, Denmark.,Center for Translational Research, Bispebjerg Hospital, Copenhagen, Denmark
| | - Laurits Froessing
- Respiratory Research Unit, Department of Respiratory Medicine, Bispebjerg Hospital, Copenhagen, Denmark.,Center for Translational Research, Bispebjerg Hospital, Copenhagen, Denmark
| | - Ditte Klein
- Respiratory Research Unit, Department of Respiratory Medicine, Bispebjerg Hospital, Copenhagen, Denmark.,Center for Translational Research, Bispebjerg Hospital, Copenhagen, Denmark
| | - Asger Sverrild
- Respiratory Research Unit, Department of Respiratory Medicine, Bispebjerg Hospital, Copenhagen, Denmark.,Center for Translational Research, Bispebjerg Hospital, Copenhagen, Denmark
| | - Lena Uller
- Respiratory Immunopharmacology, University of Lund, Lund, Sweden
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11
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Sverrild A, Hansen S, Hvidtfeldt M, Clausson CM, Cozzolino O, Cerps S, Uller L, Backer V, Erjefält J, Porsbjerg C. The effect of tezepelumab on airway hyperresponsiveness to mannitol in asthma (UPSTREAM). Eur Respir J 2021; 59:13993003.01296-2021. [PMID: 34049943 DOI: 10.1183/13993003.01296-2021] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 05/17/2021] [Indexed: 11/05/2022]
Abstract
RATIONALE AND OBJECTIVES Thymic stromal lymphopoietin (TSLP), an epithelial upstream cytokine, initiates production of type-2 (T2) cytokines with eosinophilia and possibly airway hyperresponsiveness (AHR) in asthma.This study aimed to determine whether tezepelumab (a human monoclonal antibody targeting TSLP) decreases AHR and airway inflammation in patients with symptomatic asthma on maintenance treatment with inhaled corticosteroids. METHODS AND MEASUREMENTS In this double-blind, placebo-controlled randomised trial adult patients with asthma and AHR to mannitol received either 700 mg tezepelumab or placebo intravenously at 4-week intervals for 12 weeks. AHR to mannitol was assessed, and a bronchoscopy was performed at baseline and after 12 weeks. The primary outcome was the change in AHR from baseline to week-12 and secondary outcomes were changes in airway inflammation. RESULTS Forty patients were randomised to receive either tezepelumab (n=20) or placebo (n=20). The mean change in PD15 with tezepelumab was 1.9 DD (95% CI 1.2 to 2.5) versus 1·0 (95% CI 0.3 to 1.6) with placebo; p=0.06. Nine (45%) tezepelumab and three (16%) placebo patients had a negative PD15 test at week-12, p=0.04. Airway tissue and BAL eosinophils decreased by 74% (95% CI -53 to -86) and 75% (95% CI -53 to -86) respectively with tezepelumab compared with an increase of 28% (95% CI -39 to 270) and a decrease of 7% (95% CI -49 to 72) respectively with placebo, p=0.004 and p=0.01. CONCLUSIONS Inhibiting TSLP-signalling with tezepelumab reduced the proportion of patients with AHR and decreased eosinophilic inflammation in BAL and airway tissue.
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Affiliation(s)
- Asger Sverrild
- Department of Respiratory Medicine, University Hospital Bispebjerg, Copenhagen, Denmark
| | - Susanne Hansen
- Department of Respiratory Medicine, University Hospital Bispebjerg, Copenhagen, Denmark
| | - Morten Hvidtfeldt
- Department of Respiratory Medicine, University Hospital Bispebjerg, Copenhagen, Denmark
| | | | - Olga Cozzolino
- Department of Experimental Medicine, Lund University, Lund, Sweden
| | - Samuel Cerps
- Department of Experimental Medicine, Lund University, Lund, Sweden
| | - Lena Uller
- Department of Experimental Medicine, Lund University, Lund, Sweden
| | - Vibeke Backer
- Department of ENT and Centre for Physical Activity Research (CFAS), Rigshospitalet, Copenhagen University, Copenhagen Denmark
| | - Jonas Erjefält
- Department of Experimental Medicine, Lund University, Lund, Sweden
| | - Celeste Porsbjerg
- Department of Respiratory Medicine, University Hospital Bispebjerg, Copenhagen, Denmark
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12
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Ruppenstein A, Limberg MM, Loser K, Kremer AE, Homey B, Raap U. Involvement of Neuro-Immune Interactions in Pruritus With Special Focus on Receptor Expressions. Front Med (Lausanne) 2021; 8:627985. [PMID: 33681256 PMCID: PMC7930738 DOI: 10.3389/fmed.2021.627985] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 01/27/2021] [Indexed: 12/21/2022] Open
Abstract
Pruritus is a common, but very challenging symptom with a wide diversity of underlying causes like dermatological, systemic, neurological and psychiatric diseases. In dermatology, pruritus is the most frequent symptom both in its acute and chronic form (over 6 weeks in duration). Treatment of chronic pruritus often remains challenging. Affected patients who suffer from moderate to severe pruritus have a significantly reduced quality of life. The underlying physiology of pruritus is very complex, involving a diverse network of components in the skin including resident cells such as keratinocytes and sensory neurons as well as transiently infiltrating cells such as certain immune cells. Previous research has established that there is a significant crosstalk among the stratum corneum, nerve fibers and various immune cells, such as keratinocytes, T cells, basophils, eosinophils and mast cells. In this regard, interactions between receptors on cutaneous and spinal neurons or on different immune cells play an important role in the processing of signals which are important for the transmission of pruritus. In this review, we discuss the role of various receptors involved in pruritus and inflammation, such as TRPV1 and TRPA1, IL-31RA and OSMR, TSLPR, PAR-2, NK1R, H1R and H4R, MRGPRs as well as TrkA, with a focus on interaction between nerve fibers and different immune cells. Emerging evidence shows that neuro-immune interactions play a pivotal role in mediating pruritus-associated inflammatory skin diseases such as atopic dermatitis, psoriasis or chronic spontaneous urticaria. Targeting these bidirectional neuro-immune interactions and the involved pruritus-specific receptors is likely to contribute to novel insights into the underlying pathogenesis and targeted treatment options of pruritus.
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Affiliation(s)
- Aylin Ruppenstein
- Division of Experimental Allergy and Immunodermatology, Faculty of Medicine and Health Sciences, University of Oldenburg, Oldenburg, Germany
| | - Maren M Limberg
- Division of Experimental Allergy and Immunodermatology, Faculty of Medicine and Health Sciences, University of Oldenburg, Oldenburg, Germany
| | - Karin Loser
- Division of Immunology, Faculty of Medicine and Health Sciences, University of Oldenburg, Oldenburg, Germany
| | - Andreas E Kremer
- Department of Medicine 1, University Hospital Erlangen and Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Bernhard Homey
- Department of Dermatology, Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | - Ulrike Raap
- Division of Experimental Allergy and Immunodermatology, Faculty of Medicine and Health Sciences, University of Oldenburg, Oldenburg, Germany.,University Clinic of Dermatology and Allergy, Oldenburg Clinic, Oldenburg, Germany
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13
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The Airway Epithelium-A Central Player in Asthma Pathogenesis. Int J Mol Sci 2020; 21:ijms21238907. [PMID: 33255348 PMCID: PMC7727704 DOI: 10.3390/ijms21238907] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/20/2020] [Accepted: 11/21/2020] [Indexed: 12/11/2022] Open
Abstract
Asthma is a chronic inflammatory airway disease characterized by variable airflow obstruction in response to a wide range of exogenous stimuli. The airway epithelium is the first line of defense and plays an important role in initiating host defense and controlling immune responses. Indeed, increasing evidence indicates a range of abnormalities in various aspects of epithelial barrier function in asthma. A central part of this impairment is a disruption of the airway epithelial layer, allowing inhaled substances to pass more easily into the submucosa where they may interact with immune cells. Furthermore, many of the identified susceptibility genes for asthma are expressed in the airway epithelium. This review focuses on the biology of the airway epithelium in health and its pathobiology in asthma. We will specifically discuss external triggers such as allergens, viruses and alarmins and the effect of type 2 inflammatory responses on airway epithelial function in asthma. We will also discuss epigenetic mechanisms responding to external stimuli on the level of transcriptional and posttranscriptional regulation of gene expression, as well the airway epithelium as a potential treatment target in asthma.
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14
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Gauvreau GM, Sehmi R, Ambrose CS, Griffiths JM. Thymic stromal lymphopoietin: its role and potential as a therapeutic target in asthma. Expert Opin Ther Targets 2020; 24:777-792. [PMID: 32567399 DOI: 10.1080/14728222.2020.1783242] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Thymic stromal lymphopoietin (TSLP), an epithelial cytokine (alarmin), is a central regulator of the immune response to inhaled environmental insults such as allergens, viruses and pollutants, initiating a cascade of downstream inflammation. There is compelling evidence that TSLP plays a major role in the pathology of asthma, and therapies that aim to block its activity are in development. AREAS COVERED We review studies conducted in humans and human cells, largely published in PubMed January 2010-October 2019, that investigated the innate and adaptive immune mechanisms of TSLP in asthma relevant to type 2-driven (eosinophilic/allergic) inflammation and non-type 2-driven (non-eosinophilic/non-allergic) inflammation, and the role of TSLP as a mediator between immune cells and structural cells in the airway. Clinical data from studies evaluating TSLP blockade are also discussed. EXPERT OPINION The position of TSLP at the top of the inflammatory cascade makes it a promising therapeutic target in asthma. Systemic anti-TSLP monoclonal antibody therapy with tezepelumab has yielded positive results in clinical trials to date, reducing exacerbations and biomarkers of inflammation in patients across the spectrum of inflammatory endotypes. Inhaled anti-TSLP is an alternative route currently under evaluation. The long-term safety and efficacy of TSLP blockade need to be evaluated.
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Affiliation(s)
- Gail M Gauvreau
- Department of Medicine, McMaster University , Hamilton, Ontario, Canada
| | - Roma Sehmi
- Department of Medicine, McMaster University , Hamilton, Ontario, Canada
| | | | - Janet M Griffiths
- Translational Science and Experimental Medicine, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D , Gaithersburg, MD, USA
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15
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Ganjian H, Rajput C, Elzoheiry M, Sajjan U. Rhinovirus and Innate Immune Function of Airway Epithelium. Front Cell Infect Microbiol 2020; 10:277. [PMID: 32637363 PMCID: PMC7316886 DOI: 10.3389/fcimb.2020.00277] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 05/12/2020] [Indexed: 12/13/2022] Open
Abstract
Airway epithelial cells, which lines the respiratory mucosa is in direct contact with the environment. Airway epithelial cells are the primary target for rhinovirus and other inhaled pathogens. In response to rhinovirus infection, airway epithelial cells mount both pro-inflammatory responses and antiviral innate immune responses to clear the virus efficiently. Some of the antiviral responses include the expression of IFNs, endoplasmic reticulum stress induced unfolded protein response and autophagy. Airway epithelial cells also recruits other innate immune cells to establish antiviral state and resolve the inflammation in the lungs. In patients with chronic lung disease, these responses may be either defective or induced in excess leading to deficient clearing of virus and sustained inflammation. In this review, we will discuss the mechanisms underlying antiviral innate immunity and the dysregulation of some of these mechanisms in patients with chronic lung diseases.
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Affiliation(s)
- Haleh Ganjian
- Department of Thoracic Medicine and Surgery, Lewis Katz Medical School, Temple University, Philadelphia, PA, United States
| | - Charu Rajput
- Department of Thoracic Medicine and Surgery, Lewis Katz Medical School, Temple University, Philadelphia, PA, United States
| | - Manal Elzoheiry
- Department of Thoracic Medicine and Surgery, Lewis Katz Medical School, Temple University, Philadelphia, PA, United States
| | - Umadevi Sajjan
- Department of Thoracic Medicine and Surgery, Lewis Katz Medical School, Temple University, Philadelphia, PA, United States
- Department of Physiology, Lewis Katz Medical School, Temple University, Philadelphia, PA, United States
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16
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Frey A, Lunding LP, Ehlers JC, Weckmann M, Zissler UM, Wegmann M. More Than Just a Barrier: The Immune Functions of the Airway Epithelium in Asthma Pathogenesis. Front Immunol 2020; 11:761. [PMID: 32411147 PMCID: PMC7198799 DOI: 10.3389/fimmu.2020.00761] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 04/03/2020] [Indexed: 12/11/2022] Open
Abstract
Allergic bronchial asthma is a chronic disease of the airways that is characterized by symptoms like respiratory distress, chest tightness, wheezing, productive cough, and acute episodes of broncho-obstruction. This symptom-complex arises on the basis of chronic allergic inflammation of the airway wall. Consequently, the airway epithelium is central to the pathogenesis of this disease, because its multiple abilities directly have an impact on the inflammatory response and thus the formation of the disease. In turn, its structure and functions are markedly impaired by the inflammation. Hence, the airway epithelium represents a sealed, self-cleaning barrier, that prohibits penetration of inhaled allergens, pathogens, and other noxious agents into the body. This barrier is covered with mucus that further contains antimicrobial peptides and antibodies that are either produced or specifically transported by the airway epithelium in order to trap these particles and to remove them from the body by a process called mucociliary clearance. Once this first line of defense of the lung is overcome, airway epithelial cells are the first cells to get in contact with pathogens, to be damaged or infected. Therefore, these cells release a plethora of chemokines and cytokines that not only induce an acute inflammatory reaction but also have an impact on the alignment of the following immune reaction. In case of asthma, all these functions are impaired by the already existing allergic immune response that per se weakens the barrier integrity and self-cleaning abilities of the airway epithelium making it more vulnerable to penetration of allergens as well as of infection by bacteria and viruses. Recent studies indicate that the history of allergy- and pathogen-derived insults can leave some kind of memory in these cells that can be described as imprinting or trained immunity. Thus, the airway epithelium is in the center of processes that lead to formation, progression and acute exacerbation of asthma.
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Affiliation(s)
- Andreas Frey
- Division of Mucosal Immunology and Diagnostics, Research Center Borstel, Borstel, Germany.,Airway Research Center North, German Center for Lung Research (DZL), Borstel, Germany
| | - Lars P Lunding
- Airway Research Center North, German Center for Lung Research (DZL), Borstel, Germany.,Division of Asthma Exacerbation & Regulation, Research Center Borstel, Borstel, Germany
| | - Johanna C Ehlers
- Airway Research Center North, German Center for Lung Research (DZL), Borstel, Germany.,Division of Experimental Pneumology, Research Center Borstel, Borstel, Germany
| | - Markus Weckmann
- Airway Research Center North, German Center for Lung Research (DZL), Borstel, Germany.,Department of Pediatric Pulmonology and Allergology, University Children's Hospital, Lübeck, Germany
| | - Ulrich M Zissler
- Center of Allergy & Environment (ZAUM), Technical University of Munich and Helmholtz Center Munich, German Research Center for Environmental Health, Munich, Germany.,Member of the German Center for Lung Research (DZL), CPC-M, Munich, Germany
| | - Michael Wegmann
- Airway Research Center North, German Center for Lung Research (DZL), Borstel, Germany.,Division of Asthma Exacerbation & Regulation, Research Center Borstel, Borstel, Germany
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17
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Hiranuma H, Gon Y, Maruoka S, Kozu Y, Yamada S, Fukuda A, Kurosawa Y, Tetsuo S, Nakagawa Y, Mizumura K. DsRNA induction of microRNA-155 disrupt tight junction barrier by modulating claudins. Asia Pac Allergy 2020; 10:e20. [PMID: 32411585 PMCID: PMC7203438 DOI: 10.5415/apallergy.2020.10.e20] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 04/24/2020] [Indexed: 01/12/2023] Open
Abstract
Background The impaired barrier function of the airway epithelium due to RNA virus infection is closely related to the development and exacerbation of allergic airway inflammation. Objective In this study, we investigated the roles of microRNAs on the mechanisms of double-stranded RNA (dsRNA)-induced epithelial barrier dysfunction. Methods 16HBE14o- human bronchial epithelial cells were grown to confluence on Transwell inserts and exposed to poly-I:C. We studied epithelial barrier function by measuring transepithelial electrical resistance and paracellular flux of fluorescent markers and structure of tight junctions by immunofluorescence microscopy. Results Poly-I:C treated 16HBE14o- cells increased paracellular permeability. Knockdown of Toll-like receptor 3 and TRIF abrogated these effects. The expression of microRNA-155 (miR-155) was increased by poly-I:C in dose-dependent manner. Transfection of mir155 mimics into 16HBE14o- cells increased permeability and inhibited tight junction formation. Transfection of miR-155 inhibitor suppressed poly-I:C-induced barrier disruption. Poly-I:C treatment significantly decreased the expression of claudin members—claudin-1, -3, -4, -5, -9, -11, -16, -18 and -19. Transfection of miR-155 mimics showed similar changing expression pattern of claudin members with those of poly-I:C treatment. Conclusion These results suggest that RNA virus infection can impair the epithelial barrier disruption mechanism by down-regulation of claudin members through the induction of miR-155.
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Affiliation(s)
- Hisato Hiranuma
- Division of Respiratory Medicine, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Yasuhiro Gon
- Division of Respiratory Medicine, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Shuichiro Maruoka
- Division of Respiratory Medicine, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Yutaka Kozu
- Division of Respiratory Medicine, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Shiho Yamada
- Division of Respiratory Medicine, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Asami Fukuda
- Division of Respiratory Medicine, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Yusuke Kurosawa
- Division of Respiratory Medicine, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Shimizu Tetsuo
- Division of Respiratory Medicine, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Yoshiko Nakagawa
- Division of Respiratory Medicine, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan
| | - Kenji Mizumura
- Division of Respiratory Medicine, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, Japan
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18
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Muehling LM, Heymann PW, Wright PW, Eccles JD, Agrawal R, Carper HT, Murphy DD, Workman LJ, Word CR, Ratcliffe SJ, Capaldo BJ, Platts-Mills TAE, Turner RB, Kwok WW, Woodfolk JA. Human T H1 and T H2 cells targeting rhinovirus and allergen coordinately promote allergic asthma. J Allergy Clin Immunol 2020; 146:555-570. [PMID: 32320734 DOI: 10.1016/j.jaci.2020.03.037] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 03/03/2020] [Accepted: 03/27/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Allergic asthmatic subjects are uniquely susceptible to acute wheezing episodes provoked by rhinovirus. However, the underlying immune mechanisms and interaction between rhinovirus and allergy remain enigmatic, and current paradigms are controversial. OBJECTIVE We sought to perform a comprehensive analysis of type 1 and type 2 innate and adaptive responses in allergic asthmatic subjects infected with rhinovirus. METHODS Circulating virus-specific TH1 cells and allergen-specific TH2 cells were precisely monitored before and after rhinovirus challenge in allergic asthmatic subjects (total IgE, 133-4692 IU/mL; n = 28) and healthy nonallergic controls (n = 12) using peptide/MHCII tetramers. T cells were sampled for up to 11 weeks to capture steady-state and postinfection phases. T-cell responses were analyzed in parallel with 18 cytokines in the nose, upper and lower airway symptoms, and lung function. The influence of in vivo IgE blockade was also examined. RESULTS In uninfected asthmatic subjects, higher numbers of circulating virus-specific PD-1+ TH1 cells, but not allergen-specific TH2 cells, were linked to worse lung function. Rhinovirus infection induced an amplified antiviral TH1 response in asthmatic subjects versus controls, with synchronized allergen-specific TH2 expansion, and production of type 1 and 2 cytokines in the nose. In contrast, TH2 responses were absent in infected asthmatic subjects who had normal lung function, and in those receiving anti-IgE. Across all subjects, early induction of a minimal set of nasal cytokines that discriminated high responders (G-CSF, IFN-γ, TNF-α) correlated with both egress of circulating virus-specific TH1 cells and worse symptoms. CONCLUSIONS Rhinovirus induces robust TH1 responses in allergic asthmatic subjects that may promote disease, even after the infection resolves.
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Affiliation(s)
- Lyndsey M Muehling
- Department of Medicine, University of Virginia School of Medicine, Charlottesville; Department of Microbiology, University of Virginia School of Medicine, Charlottesville
| | - Peter W Heymann
- Department of Pediatrics, University of Virginia School of Medicine, Charlottesville
| | - Paul W Wright
- Department of Medicine, University of Virginia School of Medicine, Charlottesville
| | - Jacob D Eccles
- Department of Medicine, University of Virginia School of Medicine, Charlottesville; Department of Microbiology, University of Virginia School of Medicine, Charlottesville
| | - Rachana Agrawal
- Department of Medicine, University of Virginia School of Medicine, Charlottesville
| | - Holliday T Carper
- Department of Pediatrics, University of Virginia School of Medicine, Charlottesville
| | - Deborah D Murphy
- Department of Pediatrics, University of Virginia School of Medicine, Charlottesville
| | - Lisa J Workman
- Department of Medicine, University of Virginia School of Medicine, Charlottesville
| | - Carolyn R Word
- Department of Pediatrics, University of Virginia School of Medicine, Charlottesville
| | - Sarah J Ratcliffe
- Department of Public Health Sciences, University of Virginia School of Medicine, Charlottesville
| | - Brian J Capaldo
- Department of Microbiology, University of Virginia School of Medicine, Charlottesville
| | | | - Ronald B Turner
- Department of Pediatrics, University of Virginia School of Medicine, Charlottesville
| | | | - Judith A Woodfolk
- Department of Medicine, University of Virginia School of Medicine, Charlottesville; Department of Microbiology, University of Virginia School of Medicine, Charlottesville.
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19
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Nakajima S, Kabata H, Kabashima K, Asano K. Anti-TSLP antibodies: Targeting a master regulator of type 2 immune responses. Allergol Int 2020; 69:197-203. [PMID: 31974038 DOI: 10.1016/j.alit.2020.01.001] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 11/08/2019] [Accepted: 12/10/2019] [Indexed: 12/21/2022] Open
Abstract
TSLP is an epithelial cell-derived cytokine synthesized in response to various stimuli, including protease allergens and microorganisms like viruses and bacteria. Biological functions of TSLP require heterodimer formation between the TSLP receptor (TSLPR) and IL-7 receptor-α, which polarize dendritic cells to induce type 2 inflammation and directly expand and/or activate Th2 cells, group 2 innate lymphoid cells, basophils, and other immune cells. TSLP is thus considered a master regulator of type 2 immune responses at the barrier surfaces of skin and the respiratory/gastrointestinal tract. Indeed, genetic, experimental, and clinical evidence suggests that the TSLP-TSLPR pathway is associated with the pathogenesis of allergic diseases such as atopic dermatitis (AD) and asthma. Tezepelumab (AMG-157/MEDI9929) is a human anti-TSLP antibody that prevents TSLP-TSLPR interactions. A phase 2 trial for moderate to severe AD showed that a greater but not statistically significant percentage of tezepelumab-treated patients showed clinical improvements compared to the placebo group. A phase 2 trial for uncontrolled, severe asthma showed significant decreases in asthma exacerbation rate and improved pulmonary function and asthma control for tezepelumab-treated patients. Levels of biomarkers of type 2 inflammation, such as blood/sputum eosinophil counts and fraction of exhaled nitric oxide decreased, however, clinical efficacy was observed irrespective of the baseline levels of these biomarkers. A blockade of the TSLP-TSLPR pathway likely will exert significant clinical effects on AD, asthma, and other allergic diseases. The efficacy of anti-TSLP antibodies compared to other biologics needs to be further examined.
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20
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Moorehead A, Hanna R, Heroux D, Neighbour H, Sandford A, Gauvreau GM, Sommer DD, Denburg JA, Akhabir L. A thymic stromal lymphopoietin polymorphism may provide protection from asthma by altering gene expression. Clin Exp Allergy 2020; 50:471-478. [PMID: 31943442 DOI: 10.1111/cea.13568] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 12/31/2019] [Accepted: 01/08/2020] [Indexed: 01/07/2023]
Abstract
BACKGROUND Genome-wide association studies have identified associations of the single nucleotide polymorphism rs1837253 in the thymic stromal lymphopoietin (TSLP) gene with asthma, allergic disease and eosinophilia. The TSLP gene encodes two isoforms, long and short, and previous studies have indicated functional differences between these two isoforms. OBJECTIVE We investigated the expression of these TSLP isoforms in response to a pro-inflammatory signal, and the role of the rs1837253 genotype in gene isoform regulation. METHODS We cultured nasal epithelial cells of asthmatic and non-asthmatic subjects and evaluated poly(I:C)-induced TSLP protein secretion using multiplex protein assays and gene expression profiles of the TSLP isoforms, and related genes using real-time qPCR. We correlated these profiles with rs1837253 genotype. RESULTS Asthmatic nasal epithelial cells exhibited increased TSLP protein secretion compared with nasal epithelial cells from healthy controls. The long TSLP isoform was more responsive to poly(I:C) stimulation. Additionally, the minor T allele of rs1837253 was less inducible than the major C allele, suggesting differential regulation; this may explain the "protective" effects of the T allele in asthma. CONCLUSION Our results provide important insights into the differential regulation and function of TSLP isoforms, including the role of TSLP rs1837253 polymorphisms in allergic inflammatory processes. CLINICAL RELEVANCE The key finding on the influence of TSLP genetic variation on disease expression/endotype could provide basis for investigation into targeted biologics for anti-TSLP therapies.
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Affiliation(s)
- Amy Moorehead
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Raphael Hanna
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Delia Heroux
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Helen Neighbour
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Andrew Sandford
- Department of Medicine, The University of British Columbia, Vancouver, BC, Canada
| | - Gail M Gauvreau
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Doron D Sommer
- Department of Surgery, McMaster University, Hamilton, ON, Canada
| | - Judah A Denburg
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Loubna Akhabir
- Department of Medicine, McMaster University, Hamilton, ON, Canada
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21
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Lung IFNAR1 hi TNFR2 + cDC2 promotes lung regulatory T cells induction and maintains lung mucosal tolerance at steady state. Mucosal Immunol 2020; 13:595-608. [PMID: 31959883 PMCID: PMC7311323 DOI: 10.1038/s41385-020-0254-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 12/17/2019] [Accepted: 01/06/2020] [Indexed: 02/07/2023]
Abstract
The lung is a naturally tolerogenic organ. Lung regulatory T cells (T-regs) control lung mucosal tolerance. Here, we identified a lung IFNAR1hiTNFR2+ conventional DC2 (iR2D2) population that induces T-regs in the lung at steady state. Using conditional knockout mice, adoptive cell transfer, receptor blocking antibodies, and TNFR2 agonist, we showed that iR2D2 is a lung microenvironment-adapted dendritic cell population whose residence depends on the constitutive TNFR2 signaling. IFNβ-IFNAR1 signaling in iR2D2 is necessary and sufficient for T-regs induction in the lung. The Epcam+CD45- epithelial cells are the sole lung IFNβ producer at the steady state. Surprisingly, iR2D2 is plastic. In a house dust mite model of asthma, iR2D2 generates lung TH2 responses. Last, healthy human lungs have a phenotypically similar tolerogenic iR2D2 population, which became pathogenic in lung disease patients. Our findings elucidate lung epithelial cells IFNβ-iR2D2-T-regs axis in controlling lung mucosal tolerance and provide new strategies for therapeutic interventions.
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22
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Menzel M, Ramu S, Calvén J, Olejnicka B, Sverrild A, Porsbjerg C, Tufvesson E, Bjermer L, Akbarshahi H, Uller L. Oxidative Stress Attenuates TLR3 Responsiveness and Impairs Anti-viral Mechanisms in Bronchial Epithelial Cells From COPD and Asthma Patients. Front Immunol 2019; 10:2765. [PMID: 31849956 PMCID: PMC6895140 DOI: 10.3389/fimmu.2019.02765] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 11/12/2019] [Indexed: 12/16/2022] Open
Abstract
COPD and asthma exacerbations are commonly triggered by rhinovirus infection. Potentially promoting exacerbations, impaired anti-viral signaling and attenuated viral clearance have been observed in diseased bronchial epithelium. Oxidative stress is a feature of inflammation in asthma and COPD and is prominent during exacerbations. It is not known whether oxidative stress affects the anti-viral signaling capacity. Bronchial epithelial cells from asthmatic and COPD donors were infected with rhinovirus or treated with the oxidative stressor H2O2 followed by exposure to the synthetic viral replication intermediate poly(I:C). Poly(I:C) was used to ascertain a constant infection-like burden. Gene and protein levels of antioxidants as well as anti-viral responses were measured 3 and 24 h post poly(I:C) exposure. Rhinovirus infection and poly(I:C) stimulation induced protein levels of the antioxidants SOD1 and SOD2. In asthmatic bronchial epithelial cells pre-treatment with H2O2 dose-dependently decreased the antioxidant response to poly(I:C), suggesting exaggerated oxidative stress. Further, poly(I:C)-induced IFNβ gene expression was reduced after pre-treatment with H2O2. This epithelial effect was associated with a reduced expression of the pattern recognition receptors RIG-I, MDA5 and TLR3 both on gene and protein level. Pre-treatment with H2O2 did not alter antioxidant responses in COPD bronchial epithelial cells and, more modestly than in asthma, reduced poly(I:C)-induced IFNβ gene expression. Knockdown of TLR3 but not RIG-I/MDA5 abrogated impairment of poly(I:C)-induced IFNβ gene expression by H2O2. We developed a method by which we could demonstrate that oxidative stress impairs anti-viral signaling in bronchial epithelial cells from asthmatic and COPD patients, most pronounced in asthma. The impairment apparently reflects reduced responsiveness of TLR3. These present findings shed light on molecular mechanisms potentially causing reduced interferon responses to rhinovirus infection at exacerbations in asthma and COPD. Together, our findings suggest a possible self-perpetuating vicious cycle underlying recurrent exacerbations, leading to an impaired anti-viral response, which in turn leads to viral-induced exacerbations, causing more airway inflammation.
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Affiliation(s)
- Mandy Menzel
- Unit of Respiratory Immunopharmacology, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Sangeetha Ramu
- Unit of Respiratory Immunopharmacology, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Jenny Calvén
- Unit of Respiratory Immunopharmacology, Department of Experimental Medical Science, Lund University, Lund, Sweden.,Department of Internal Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Beata Olejnicka
- Airway Inflammation Unit, Department of Experimental Medical Science, Lund University, Lund, Sweden.,Department of Internal Medicine, Trelleborg Hospital, Trelleborg, Sweden
| | - Asger Sverrild
- Department of Respiratory Medicine, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
| | - Celeste Porsbjerg
- Department of Respiratory Medicine, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
| | - Ellen Tufvesson
- Unit of Respiratory Medicine and Allergology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Leif Bjermer
- Unit of Respiratory Medicine and Allergology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Hamid Akbarshahi
- Unit of Respiratory Immunopharmacology, Department of Experimental Medical Science, Lund University, Lund, Sweden.,Unit of Respiratory Medicine and Allergology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Lena Uller
- Unit of Respiratory Immunopharmacology, Department of Experimental Medical Science, Lund University, Lund, Sweden
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23
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Clifford RL, Patel J, MacIsaac JL, McEwen LM, Johnson SR, Shaw D, Knox AJ, Hackett TL, Kobor MS. Airway epithelial cell isolation techniques affect DNA methylation profiles with consequences for analysis of asthma related perturbations to DNA methylation. Sci Rep 2019; 9:14409. [PMID: 31595000 PMCID: PMC6783553 DOI: 10.1038/s41598-019-50873-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 09/15/2019] [Indexed: 12/14/2022] Open
Abstract
The airway epithelium forms the interface between the inhaled environment and the lung. The airway epithelium is dysfunctional in asthma and epigenetic mechanisms are considered a contributory factor. We hypothesised that the DNA methylation profiles of cultured primary airway epithelial cells (AECs) would differ between cells isolated from individuals with asthma (n = 17) versus those without asthma (n = 16). AECs were isolated from patients by two different isolation techniques; pronase digestion (9 non-asthmatic, 8 asthmatic) and bronchial brushings (7 non-asthmatic and 9 asthmatic). DNA methylation was assessed using an Illumina Infinium HumanMethylation450 BeadChip array. DNA methylation of AECs clustered by isolation technique and linear regression identified 111 CpG sites differentially methylated between isolation techniques in healthy individuals. As a consequence, the effect of asthmatic status on DNA methylation was assessed within AEC samples isolated using the same technique. In pronase isolated AECs, 15 DNA regions were differentially methylated between asthmatics and non-asthmatics. In bronchial brush isolated AECs, 849 differentially methylated DNA regions were identified with no overlap to pronase regions. In conclusion, regardless of cell isolation technique, differential DNA methylation was associated with asthmatic status in AECs, providing further evidence for aberrant DNA methylation as a signature of epithelial dysfunction in asthma.
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Affiliation(s)
- Rachel L Clifford
- Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Division of Respiratory Medicine, University of Nottingham, Nottingham University Hospitals NHS Trust, Nottingham, UK. .,Centre for Molecular Medicine and Therapeutics, BC Children's Hospital Research Institute, Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada.
| | - Jamie Patel
- Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Division of Respiratory Medicine, University of Nottingham, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Julia L MacIsaac
- Centre for Molecular Medicine and Therapeutics, BC Children's Hospital Research Institute, Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Lisa M McEwen
- Centre for Molecular Medicine and Therapeutics, BC Children's Hospital Research Institute, Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Simon R Johnson
- Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Division of Respiratory Medicine, University of Nottingham, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Dominick Shaw
- Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Division of Respiratory Medicine, University of Nottingham, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Alan J Knox
- Nottingham NIHR Biomedical Research Centre, Nottingham MRC Molecular Pathology Node, Division of Respiratory Medicine, University of Nottingham, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Tillie-Louise Hackett
- Centre for Heart Lung Innovation, University of British Columbia, Vancouver, Canada.,Department of Anaesthesiology, Pharmacology & Therapeutics, University of British Columbia, Vancouver, Canada
| | - Michael S Kobor
- Centre for Molecular Medicine and Therapeutics, BC Children's Hospital Research Institute, Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada
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24
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Mikhail I, Grayson MH. Asthma and viral infections: An intricate relationship. Ann Allergy Asthma Immunol 2019; 123:352-358. [PMID: 31276807 PMCID: PMC7111180 DOI: 10.1016/j.anai.2019.06.020] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 06/11/2019] [Accepted: 06/24/2019] [Indexed: 12/28/2022]
Abstract
OBJECTIVE To synthesize available data related to the complex associations among viral infections, atopy, and asthma. DATA SOURCES Key historical articles, articles highlighted in our recent review of most significant recent asthma advancements, and findings from several birth cohorts related to asthma and viral infections were reviewed. In addition, PubMed was searched for review articles and original research related to the associations between viral infection and asthma, using the search words asthma, viral infections, atopy, development of asthma, rhinovirus (RV), and respiratory syncytial virus (RSV). STUDY SELECTIONS Articles were selected based on novelty and relevance to our topic of interest, the role of asthma and viral infections, and possible mechanisms to explain the association. RESULTS There is a large body of evidence demonstrating a link between early viral infections (especially RV and RSV) and asthma inception and exacerbations. RV-induced wheezing is an important risk factor for asthma only when atopy is present, with much evidence supporting the idea that sensitization is a risk factor for early RV-induced wheezing, which in turn is a risk factor for asthma. RSV, on the other hand, is a more important risk factor for nonatopic asthma, with severe infections conferring greater risk. CONCLUSION There are important differences in the development of atopic and nonatopic asthma, with several proposed mechanisms explaining the association between viral infections and the development of asthma and asthma exacerbations. Understanding these complex associations is important for developing asthma prevention strategies and targeted asthma therapies.
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Affiliation(s)
- Irene Mikhail
- Division of Allergy and Immunology, Department of Pediatrics, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio.
| | - Mitchell H Grayson
- Division of Allergy and Immunology, Department of Pediatrics, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio
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25
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Cai X, Xu Q, Zhou C, Zhou L, Dai W, Ji G. The association of nucleotide-binding oligomerization domain 2 gene polymorphisms with the risk of asthma in the Chinese Han population. Mol Genet Genomic Med 2019; 7:e00675. [PMID: 30950247 PMCID: PMC6565575 DOI: 10.1002/mgg3.675] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 02/17/2019] [Accepted: 03/14/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Genetic background is one of the important risk factors for development of asthma. The nucleotide-binding oligomerization domain 2 (NOD2) has been involved in the pathogenesis of asthma. The purpose of this study was to explore the relationship between NOD2 gene polymorphisms and asthma susceptibility in the Chinese Han population. METHODS Children with asthma (n = 309) and Healthy children (n = 163) were recruited from Yancheng Third People's Hospital, Yancheng, China, between January 2016 and December 2017. The NOD2 gene polymorphisms were measured by the Snapshot SNP genotyping assays. Genotyping was performed for 4 tag SNPs of NOD2. Serum IFN-β levels were measured by ELISA. RESULTS The serum IFN-β levels were significantly lower in Asthmatic children than those in the controls (p < 0.001). Low levels of IFN-β may be related to the susceptibility to severe asthma. The rs3135499 C allele was associated with a significantly increased risk of asthma as compared with the rs3135499 A allele. CONCLUSION The rs3135499 polymorphism of NOD2 gene and IFN-β may play a role in the pathogenesis of asthma.
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Affiliation(s)
- Xulong Cai
- Department of Pediatrics, Yancheng Third People's Hospital, Yancheng, China
| | - Qiaolan Xu
- Department of Pediatrics, Yancheng Third People's Hospital, Yancheng, China
| | - Chenrong Zhou
- Department of Pediatrics, Yancheng Third People's Hospital, Yancheng, China
| | - Li Zhou
- Department of Pediatrics, Yancheng Third People's Hospital, Yancheng, China
| | - Weihua Dai
- Department of Pediatrics, Yancheng Third People's Hospital, Yancheng, China
| | - Guanchi Ji
- Department of Pediatrics, Yancheng Third People's Hospital, Yancheng, China
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26
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Paul AGA, Muehling LM, Eccles JD, Woodfolk JA. T cells in severe childhood asthma. Clin Exp Allergy 2019; 49:564-581. [PMID: 30793397 DOI: 10.1111/cea.13374] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 02/05/2019] [Accepted: 02/11/2019] [Indexed: 12/17/2022]
Abstract
Severe asthma in children is a debilitating condition that accounts for a disproportionately large health and economic burden of asthma. Reasons for the lack of a response to standard anti-inflammatory therapies remain enigmatic. Work in the last decade has shed new light on the heterogeneous nature of asthma, and the varied immunopathologies of severe disease, which are leading to new treatment approaches for the individual patient. However, most studies to date that explored the immune landscape of the inflamed lower airways have focused on adults. T cells are pivotal to the inception and persistence of inflammatory processes in the diseased lungs, despite a contemporary shift in focus to immune events at the epithelial barrier. This article outlines current knowledge on the types of T cells and related cell types that are implicated in severe asthma. The potential for environmental exposures and other inflammatory cues to condition the immune environment of the lung in early life to favour pathogenic T cells and steroid resistance is discussed. The contributions of T cells and their cytokines to inflammatory processes and treatment resistance are also considered, with an emphasis on new observations in children that argue against conventional type 1 and type 2 T cell paradigms. Finally, the ability for new technologies to revolutionize our understanding of T cells in severe childhood asthma, and to guide future treatment strategies that could mitigate this disease, is highlighted.
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Affiliation(s)
- Alberta G A Paul
- Department of Medicine, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Lyndsey M Muehling
- Department of Medicine, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Jacob D Eccles
- Department of Medicine, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Judith A Woodfolk
- Department of Medicine, University of Virginia School of Medicine, Charlottesville, Virginia
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27
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Christou EAA, Giardino G, Stefanaki E, Ladomenou F. Asthma: An Undermined State of Immunodeficiency. Int Rev Immunol 2019; 38:70-78. [PMID: 30939053 DOI: 10.1080/08830185.2019.1588267] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Asthma is a heterogeneous chronic respiratory disease characterized by an increased burden of infections. Respiratory tract infections associated with an increased risk for asthma especially when occurring in the first months of life, also represent the most common cause of asthma exacerbations. The association between asthma and the increased frequency of infections and microbiota dysbiosis might be explained by a common mechanism, such as an underlying immune system defect. Apart from the well-established association between primary immunodeficiencies and asthma, several alterations in the immune response following infection have also been observed in asthmatic patients. An impairment in lung epithelial barrier integrity exists and is associated with both an increased susceptibility to infections and the development of asthma. Asthmatic patients are also found to have a deficient interferon (IFN) response upon infection. Additionally, defects in Toll-like receptor (TLR) signaling are observed in asthma and are correlated with both recurrent infections and asthma development. In this review, we summarize the common pathophysiological background of asthma and infections, highlighting the importance of an underlying immune system defect that predispose individuals to recurrent infections and asthma.
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Affiliation(s)
| | - Giuliana Giardino
- b Department of Translational Medical Sciences , University of Naples Federico II , Naples , Italy
| | - Evangelia Stefanaki
- c Department of Pediatrics , Venizeleion General Hospital , Heraklion , Greece
| | - Fani Ladomenou
- c Department of Pediatrics , Venizeleion General Hospital , Heraklion , Greece
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28
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Sex-associated TSLP-induced immune alterations following early-life RSV infection leads to enhanced allergic disease. Mucosal Immunol 2019; 12:969-979. [PMID: 31076663 PMCID: PMC6599479 DOI: 10.1038/s41385-019-0171-3] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/23/2019] [Accepted: 04/22/2019] [Indexed: 02/04/2023]
Abstract
Many studies have linked severe RSV infection during early-life with an enhanced likelihood of developing childhood asthma, showing a greater susceptibility in boys. Our studies show that early-life RSV infection leads to differential long-term effects based upon the sex of the neonate; leaving male mice prone to exacerbation upon secondary allergen exposure while overall protecting female mice. During initial viral infection, we observed better viral control in the female mice with correlative expression of interferon-β that was not observed in male mice. Additionally, we observed persistent immune alterations in male mice at 4 weeks post infection. These alterations include Th2 and Th17-skewing, innate cytokine expression (Tslp and Il33), and infiltration of innate immune cells (DC and ILC2). Upon exposure to allergen, beginning at 4 weeks following early-life RSV-infection, male mice show severe allergic exacerbation while female mice appear to be protected. Due to persistent expression of TSLP following early-life RSV infection in male mice, genetically modified TSLPR-/- mice were evaluated and demonstrated an abrogation of allergen exacerbation in male mice. These data indicate that TSLP is involved in the altered immune environment following neonatal RSV-infection that leads to more severe responses in males during allergy exposure, later in life. Thus, TSLP may be a clinically relevant therapeutic target early in life.
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29
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Yao XJ, Liu XF, Wang XD. Potential Role of Interleukin-25/Interleukin-33/Thymic Stromal Lymphopoietin-Fibrocyte Axis in the Pathogenesis of Allergic Airway Diseases. Chin Med J (Engl) 2018; 131:1983-1989. [PMID: 30082531 PMCID: PMC6085861 DOI: 10.4103/0366-6999.238150] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Objective: Allergic airway diseases (AADs) are a group of heterogeneous disease mediated by T-helper type 2 (Th2) immune response and characterized with airway inflammation and remodeling, including allergic asthma, allergic rhinitis, and chronic rhinosinusitis with allergic background. This review aimed to discuss the abnormal epithelial-mesenchymal crosstalk in the pathogenesis of AADs. Data Sources: Articles referred in this review were collected from the database of PubMed published in English up to January 2018. Study Selection: We had done a literature search using the following terms “allergic airway disease OR asthma OR allergic rhinitis OR chronic sinusitis AND IL-25 OR IL-33 OR thymic stromal lymphopoietin OR fibrocyte”. Related original or review articles were included and carefully analyzed. Results: It is now believed that abnormal epithelial-mesenchymal crosstalk underlies the pathogenesis of AADs. However, the key regulatory factors and molecular events involved in this process still remain unclear. Epithelium-derived triple cytokines, including interleukin (IL)-25, IL-33, and thymic stromal lymphopoietin (TSLP), are shown to act on various target cells and promote the Th2 immune response. Circulating fibrocyte is an important mesenchymal cell that can mediate tissue remodeling. We previously found that IL-25-circulating fibrocyte axis was significantly upregulated in patients with asthma, which may greatly contribute to asthmatic airway inflammation and remodeling. Conclusions: In view of the redundancy of cytokines and “united airway” theory, we propose a new concept that IL-25/IL-33/TSLP-fibrocyte axis may play a vital role in the abnormal epithelial-mesenchymal crosstalk in some endotypes of AADs. This novel idea will guide potential new intervention schema for the common treatment of AADs sharing common pathogenesis in the future.
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Affiliation(s)
- Xiu-Juan Yao
- Department of Respiratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Xiao-Fang Liu
- Department of Respiratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Xiang-Dong Wang
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
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30
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Patel NN, Kohanski MA, Maina IW, Workman AD, Herbert DR, Cohen NA. Sentinels at the wall: epithelial-derived cytokines serve as triggers of upper airway type 2 inflammation. Int Forum Allergy Rhinol 2018; 9:93-99. [PMID: 30260580 DOI: 10.1002/alr.22206] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 08/19/2018] [Accepted: 08/21/2018] [Indexed: 12/28/2022]
Abstract
Recent evidence has demonstrated an expanding role of respiratory epithelial cells in immune surveillance and modulation. Studies have been focusing on the earliest events that link epithelial injury to downstream inflammatory responses. Cytokines produced by and released from respiratory epithelial cells are among these early trigger signals. Epithelial-derived cytokines, namely thymic stromal lymphopoietin (TSLP), interleukin (IL)-25, and IL-33, have come to the forefront of recent investigations. Each of these 3 cytokines has been implicated in chronic rhinosinusitis (CRS), asthma, and atopy. Herein we review studies elucidating the roles of epithelial-derived cytokines in the pathobiology of upper airway disease, with particular emphasis on type 2 inflammatory conditions.
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Affiliation(s)
- Neil N Patel
- Department of Otorhinolaryngology-Head and Neck Surgery, Division of Rhinology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA
| | - Michael A Kohanski
- Department of Otorhinolaryngology-Head and Neck Surgery, Division of Rhinology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA
| | - Ivy W Maina
- Department of Otorhinolaryngology-Head and Neck Surgery, Division of Rhinology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA
| | - Alan D Workman
- Department of Otorhinolaryngology-Head and Neck Surgery, Division of Rhinology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA
| | - De'Broski R Herbert
- Department of Pathobiology, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA
| | - Noam A Cohen
- Department of Otorhinolaryngology-Head and Neck Surgery, Division of Rhinology, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA.,Philadelphia Veterans Affairs Medical Center, Philadelphia, PA.,Monell Chemical Senses Center, Philadelphia, PA
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31
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Akbarshahi H, Menzel M, Ramu S, Mahmutovic Persson I, Bjermer L, Uller L. House dust mite impairs antiviral response in asthma exacerbation models through its effects on TLR3. Allergy 2018; 73:1053-1063. [PMID: 29319193 DOI: 10.1111/all.13378] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/10/2017] [Indexed: 12/31/2022]
Abstract
BACKGROUND Impaired antiviral interferon expression may be involved in asthma exacerbations commonly caused by rhinovirus infections. Allergy is a known risk factor for viral-induced asthma exacerbation, but little is known whether allergens may affect interferon responses. OBJECTIVE Our hypothesis is that house dust mite (HDM) impairs viral stimulus-induced antiviral signalling. METHODS Experimental asthma exacerbations were produced in vitro in human bronchial epithelial cells (HBECs) and in mice using sequential challenges with HDM and a viral infection mimic, Poly(I:C). We examined rhinovirus pattern recognition receptors (PRRs) signalling pathways and potential mechanisms of impaired interferon response. RESULTS HBECs and mice exposed to HDM prior to Poly(I:C) exhibited a reduced antiviral response compared to Poly(I:C) alone, including reduced IFN-β, IFN-λ, TLR3, RIG-I, MDA5, IRF-3 and IRF-7. Heat inactivation of HDM partially restored the TLR3-induced interferon response in vitro and in vivo. Our HBEC-data further showed that HDM directly affects TLR3 signalling by targeting the receptor glycosylation level. CONCLUSIONS Direct effects of allergens such as HDM on PRRs can present as potential mechanism for defective antiviral airway responses. Accordingly, therapeutic measures targeting inhibitory effects of allergens on antiviral PRRs may find use as a strategy to boost antiviral response and ameliorate exacerbations in asthmatic patients.
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Affiliation(s)
- H. Akbarshahi
- Unit of Respiratory Immunopharmacology; Department of Experimental Medical Science; Lund University; Lund Sweden
- Lung Medicine and Allergology; Department of Clinical Sciences; Lund University; Lund Sweden
| | - M. Menzel
- Unit of Respiratory Immunopharmacology; Department of Experimental Medical Science; Lund University; Lund Sweden
| | - S. Ramu
- Unit of Respiratory Immunopharmacology; Department of Experimental Medical Science; Lund University; Lund Sweden
| | - I. Mahmutovic Persson
- Unit of Respiratory Immunopharmacology; Department of Experimental Medical Science; Lund University; Lund Sweden
| | - L. Bjermer
- Lung Medicine and Allergology; Department of Clinical Sciences; Lund University; Lund Sweden
| | - L. Uller
- Unit of Respiratory Immunopharmacology; Department of Experimental Medical Science; Lund University; Lund Sweden
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32
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Lin SC, Cheng FY, Liu JJ, Ye YL. Expression and Regulation of Thymic Stromal Lymphopoietin and Thymic Stromal Lymphopoietin Receptor Heterocomplex in the Innate-Adaptive Immunity of Pediatric Asthma. Int J Mol Sci 2018; 19:ijms19041231. [PMID: 29670037 PMCID: PMC5979588 DOI: 10.3390/ijms19041231] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/12/2018] [Accepted: 04/14/2018] [Indexed: 12/18/2022] Open
Abstract
Asthma is a chronic inflammatory disease affecting the airway, and it is characterized by a wheezing breathing sound, variable airflow obstruction and the presence of inflammatory cells in the submucosa of the bronchi. Viral infection, pollutants and sensitivity to aeroallergens damage the epithelium from childhood, which causes asthma. The pathogenesis of asthma includes pathways of innate stimulation by environmental microbes and irritant pathogens. Damaged epithelial cells produce thymic stromal lymphopoietin (TSLP) and stimulate myeloid dendritic cell maturation through the thymic stromal lymphopoietin receptor (TSLPR) heterocomplex. TSLP-activated myeloid dendritic cells promote naive CD4+ T cells to differentiate into T helper type 2 (Th2) phenotype CD4+ T cells. Re-exposure to allergens or environmental stimuli causes an adaptive immune response. TSLP-activated dendritic cells expressing the OX40 ligand (OX40L; CD252) trigger naive CD4+ T cells to differentiate into inflammatory Th2 effector cells secreting the cytokines interleukin-4, 5, 9, and 13 (IL-4, IL-5, IL-9 and IL-13), and the dendritic cells (DCs) promote the proliferation of allergen-specific Th2 memory cells. Allergen presentation by Th2 cells through its interaction with their receptors in the presence of major histocompatibility complex (MHC) class II on B cells and through costimulation involving CD40 and CD40L interactions results in immunoglobulin class switching from IgM to IgE. DCs and other blood cell subsets express the TSLPR heterocomplex. The regulatory mechanism of the TSLPR heterocomplex on these different cell subsets remains unclear. The TSLPR heterocomplex is composed of the IL-7Rα chain and TSLPR chain. Moreover, two isoforms of TSLP, short isoform TSLP (sfTSLP) and long isoform TSLP (lfTSLP), have roles in atopic and allergic development. Identifying and clarifying the regulation of TSLPR and IL-7Rα in pediatric asthma are still difficult, because the type of blood cell and the expression for each blood cell in different stages of atopic diseases are poorly understood. We believe that further integrated assessments of the regulation mechanism of the TSLP–TSLPR heterocomplex axis in vitro and in vivo can provide a faster and earlier diagnosis of pediatric asthma and promote the development of more effective preventive strategies at the onset of allergies.
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Affiliation(s)
- Sheng-Chieh Lin
- Department of Pediatrics, Shuang Ho Hospital, Taipei Medical University, Taipei 23561, Taiwan.
- Department of Pediatrics, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan.
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei 10002, Taiwan.
| | - Fang-Yi Cheng
- Department of Clinical Pathology, Far Eastern Memorial Hospital, New Taipei City 22060, Taiwan.
- School of Medical Laboratory Science and Biotechnology, Taipei Medical University, Taipei 11031, Taiwan.
| | - Jun-Jen Liu
- School of Medical Laboratory Science and Biotechnology, Taipei Medical University, Taipei 11031, Taiwan.
- Ph.D. Program in Biotechnology Research and Development, College of Pharmacy, Taipei Medical University, Taipei 11031, Taiwan.
| | - Yi-Ling Ye
- Department of Biotechnology, National Formosa University, Yunlin County 63201, Taiwan.
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33
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Uller L, Persson C. Viral induced overproduction of epithelial TSLP: Role in exacerbations of asthma and COPD? J Allergy Clin Immunol 2018; 142:712. [PMID: 29628119 DOI: 10.1016/j.jaci.2018.01.051] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 11/29/2017] [Accepted: 01/03/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Lena Uller
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Carl Persson
- Laboratory Medicine, University Hospital of Lund, Lund, Sweden.
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Menzel M, Akbarshahi H, Tufvesson E, Persson C, Bjermer L, Uller L. Azithromycin augments rhinovirus-induced IFNβ via cytosolic MDA5 in experimental models of asthma exacerbation. Oncotarget 2018; 8:31601-31611. [PMID: 28415826 PMCID: PMC5458233 DOI: 10.18632/oncotarget.16364] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 03/12/2017] [Indexed: 02/06/2023] Open
Abstract
Deficient production of anti-viral interferons (IFNs) may be involved in causing viral-induced asthma exacerbations. Hence, drugs inducing lung IFN production would be warranted. Azithromycin may reduce asthma exacerbations but its modus operandi is unknown. Here, we investigated if azithromycin induces IFNβ expression in vitro in rhinovirus-infected bronchial epithelial cells from asthmatic donors and in vivo in our allergic inflammation-based mouse model of viral stimulus-induced asthma exacerbations. Azithromycin dose-dependently augmented viral-induced IFNβ expression in asthmatic, but not in healthy bronchial epithelial cells. The effect negatively correlated with viral load. Knockdown of MDA5 and RIG-I by siRNA showed involvement of MDA5 but not RIG-I in azithromycin's IFN-inducing effects in vitro. In vivo azithromycin induced IFNβ protein, restoring a reduced lung IFN response exclusively in allergic exacerbating mice. This was associated with induction of interferon-stimulated genes and MDA5, but not RIG-I. We suggest that clinically relevant concentrations of azithromycin produce MDA5-dependent, anti-viral, IFN-inducing effects in bronchial epithelium distinctly from asthmatic donors. Similarly, azithromycin induced MDA5-associated IFN in virally stimulated lungs in vivo exclusively in allergic mice. Effects of azithromycin and MDA5-active drugs on viral-induced exacerbations deserve further research.
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Affiliation(s)
- Mandy Menzel
- Respiratory Immunopharmacology, Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden
| | - Hamid Akbarshahi
- Respiratory Immunopharmacology, Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden
| | - Ellen Tufvesson
- Respiratory Medicine and Allergology, Department of Clinical Sciences Lund, Lund University, 22184 Lund, Sweden
| | - Carl Persson
- Division of Clinical Chemistry and Pharmacology, Department of Laboratory Medicine, Lund University, 22184 Lund, Sweden
| | - Leif Bjermer
- Respiratory Medicine and Allergology, Department of Clinical Sciences Lund, Lund University, 22184 Lund, Sweden
| | - Lena Uller
- Respiratory Immunopharmacology, Department of Experimental Medical Science, Lund University, 22184 Lund, Sweden
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Hirose K, Iwata A, Tamachi T, Nakajima H. Allergic airway inflammation: key players beyond the Th2 cell pathway. Immunol Rev 2018; 278:145-161. [PMID: 28658544 DOI: 10.1111/imr.12540] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Allergic asthma is characterized by eosinophilic airway inflammation, mucus hyperproduction, and airway hyperreactivity, causing reversible airway obstruction. Accumulating evidence indicates that antigen-specific Th2 cells and their cytokines such as IL-4, IL-5, and IL-13 orchestrate these pathognomonic features of asthma. However, over the past decade, the understanding of asthma pathogenesis has made a significant shift from a Th2 cell-dependent, IgE-mediated disease to a more complicated heterogeneous disease. Recent studies clearly show that not only Th2 cytokines but also other T cell-related cytokines such as IL-17A and IL-22 as well as epithelial cell cytokines such as IL-25, IL-33, and thymic stromal lymphopoietin (TSLP) are involved in the pathogenesis of asthma. In this review, we focus on the roles of these players beyond Th2 pathways in the pathogenesis of asthma.
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Affiliation(s)
- Koichi Hirose
- Department of Allergy and Clinical Immunology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Arifumi Iwata
- Department of Allergy and Clinical Immunology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Tomohiro Tamachi
- Department of Allergy and Clinical Immunology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hiroshi Nakajima
- Department of Allergy and Clinical Immunology, Graduate School of Medicine, Chiba University, Chiba, Japan
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Abstract
Defective production of antiviral interferon (IFN)-β is thought to contribute to rhinovirus-induced asthma exacerbations. These exacerbations are associated with elevated lung levels of lactate dehydrogenase (LDH), indicating occurrence of cell necrosis. We thus hypothesized that reduced lung IFN-β could contribute to necrotic cell death in a model of asthma exacerbations. Wild-type and IFN-β−/− mice were given saline or house dust mite (HDM) intranasally for 3 weeks to induce inflammation. Double-stranded RNA (dsRNA) was then given for additional 3 days to induce exacerbation. HDM induced an eosinophilic inflammation, which was not associated with increased expression of cleaved caspase-3, cleaved PARP or elevated bronchoalveolar lavage fluid (BALF) LDH levels in wild-type. However, exacerbation evoked by HDM + dsRNA challenges increased BALF levels of LDH, apoptotic markers and the necroptotic markers receptor-interacting protein (RIP)-3 and phosphorylation of mixed linage kinase domain-like protein (pMLKL), compared to HDM + saline. Absence of IFN-β at exacerbation further increased BALF LDH and protein expression of pMLKL compared to wild-type. We demonstrate that cell death markers are increased at viral stimulus-induced exacerbation in mouse lungs, and that absence of IFN-β augments markers of necroptotic cell death at exacerbation. Our data thus suggest a novel role of deficient IFN-β production at viral-induced exacerbation.
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Mahmutovic Persson I, Menzel M, Ramu S, Cerps S, Akbarshahi H, Uller L. IL-1β mediates lung neutrophilia and IL-33 expression in a mouse model of viral-induced asthma exacerbation. Respir Res 2018; 19:16. [PMID: 29361942 PMCID: PMC5781288 DOI: 10.1186/s12931-018-0725-z] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 01/17/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Viral-induced asthma exacerbations, which exhibit both Th1-type neutrophilia and Th2-type inflammation, associate with secretion of Interleukin (IL)-1β. IL-1β induces neutrophilic inflammation. It may also increase Th2-type cytokine expression. We hypothesised that IL-1β is causally involved in both Th1 and Th2 features of asthma exacerbations. This hypothesis is tested in our mouse model of viral stimulus-induced asthma exacerbation. METHOD Wild-type (WT) and IL-1β deficient (IL-1β-/-) mice received house dust mite (HDM) or saline intranasally during three weeks followed by intranasal dsRNA (PolyI:C molecule known for its rhinovirus infection mimic) for three consecutive days to provoke exacerbation. Bronchoalveolar lavage fluid was analysed for inflammatory cells and total protein. Lung tissues were stained for neutrophilic inflammation and IL-33. Tissue homogenates were analysed for mRNA expression of Muc5ac, CXCL1/KC, TNF-α, CCL5, IL-25, TSLP, IL-33, IL-1β, CCL11 and CCL2 using RT-qPCR. RESULTS Expression of IL-1β, neutrophil chemoattractants, CXCL1 and CCL5, the Th2-upstream cytokine IL-33, and Muc5ac were induced at exacerbation in WT mice and were significantly inhibited in IL-1β-/- mice at exacerbation. Effects of HDM alone were not reduced in IL-1β-deficient mice. CONCLUSION Without being involved in the baseline HDM-induced allergic asthma, IL-1β signalling was required to induce neutrophil chemotactic factors, IL-33, and Muc5ac expression at viral stimulus-induced exacerbation. We suggest that IL-1β has a role both in neutrophilic and Th2 inflammation at viral-induced asthma exacerbations.
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Affiliation(s)
- Irma Mahmutovic Persson
- Department Experimental Medical Science Unit of Respiratory Immunopharmacology, BMC D12, Lund University, 221 84, Lund, Sweden
| | - Mandy Menzel
- Department Experimental Medical Science Unit of Respiratory Immunopharmacology, BMC D12, Lund University, 221 84, Lund, Sweden
| | - Sangeetha Ramu
- Department Experimental Medical Science Unit of Respiratory Immunopharmacology, BMC D12, Lund University, 221 84, Lund, Sweden
| | - Samuel Cerps
- Department Experimental Medical Science Unit of Respiratory Immunopharmacology, BMC D12, Lund University, 221 84, Lund, Sweden
| | - Hamid Akbarshahi
- Department Experimental Medical Science Unit of Respiratory Immunopharmacology, BMC D12, Lund University, 221 84, Lund, Sweden
| | - Lena Uller
- Department Experimental Medical Science Unit of Respiratory Immunopharmacology, BMC D12, Lund University, 221 84, Lund, Sweden.
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Moskwa S, Piotrowski W, Marczak J, Pawełczyk M, Lewandowska-Polak A, Jarzębska M, Brauncajs M, Głobińska A, Górski P, Papadopoulos NG, Edwards MR, Johnston SL, Kowalski ML. Innate Immune Response to Viral Infections in Primary Bronchial Epithelial Cells is Modified by the Atopic Status of Asthmatic Patients. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2018; 10:144-154. [PMID: 29411555 PMCID: PMC5809763 DOI: 10.4168/aair.2018.10.2.144] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 09/10/2017] [Accepted: 09/24/2017] [Indexed: 12/18/2022]
Abstract
Purpose In order to gain an insight into determinants of reported variability in immune responses to respiratory viruses in human bronchial epithelial cells (HBECs) from asthmatics, the responses of HBEC to viral infections were evaluated in HBECs from phenotypically heterogeneous groups of asthmatics and in healthy controls. Methods HBECs were obtained during bronchoscopy from 10 patients with asthma (6 atopic and 4 non-atopic) and from healthy controls (n=9) and grown as undifferentiated cultures. HBECs were infected with parainfluenza virus (PIV)-3 (MOI 0.1) and rhinovirus (RV)-1B (MOI 0.1), or treated with medium alone. The cell supernatants were harvested at 8, 24, and 48 hours. IFN-α, CXCL10 (IP-10), and RANTES (CCL5) were analyzed by using Cytometric Bead Array (CBA), and interferon (IFN)-β and IFN-λ1 by ELISA. Gene expression of IFNs, chemokines, and IFN-regulatory factors (IRF-3 and IRF-7) was determined by using quantitative PCR. Results PIV3 and RV1B infections increased IFN-λ1 mRNA expression in HBECs from asthmatics and healthy controls to a similar extent, and virus-induced IFN-λ1 expression correlated positively with IRF-7 expression. Following PIV3 infection, IP-10 protein release and mRNA expression were significantly higher in asthmatics compared to healthy controls (median 36.03-fold). No differences in the release or expression of RANTES, IFN-λ1 protein and mRNA, or IFN-α and IFN-β mRNA between asthmatics and healthy controls were observed. However, when asthmatics were divided according to their atopic status, HBECs from atopic asthmatics (n=6) generated significantly more IFN-λ1 protein and demonstrated higher IFN-α, IFN-β, and IRF-7 mRNA expressions in response to PIV3 compared to non-atopic asthmatics (n=4) and healthy controls (n=9). In response to RV1B infection, IFN-β mRNA expression was lower (12.39-fold at 24 hours and 19.37-fold at 48 hours) in non-atopic asthmatics compared to atopic asthmatics. Conclusions The immune response of HBECs to virus infections may not be deficient in asthmatics, but seems to be modified by atopic status.
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Affiliation(s)
- Sylwia Moskwa
- Department of Immunology, Rheumatology and Allergy; Healthy Ageing Research Centre, Medical University of Lodz, Lodz, Poland.,Department of Microbiology and Laboratory Medical Immunology, Medical University of Lodz, Lodz, Poland
| | - Wojciech Piotrowski
- Department of Pneumonology and Allergy, Medical University of Lodz, Lodz, Poland
| | - Jerzy Marczak
- Department of Pneumonology and Allergy, Medical University of Lodz, Lodz, Poland
| | - Małgorzata Pawełczyk
- Department of Immunology, Rheumatology and Allergy; Healthy Ageing Research Centre, Medical University of Lodz, Lodz, Poland
| | - Anna Lewandowska-Polak
- Department of Immunology, Rheumatology and Allergy; Healthy Ageing Research Centre, Medical University of Lodz, Lodz, Poland.,Department of Rheumatology, Medical University of Lodz, Lodz, Poland
| | - Marzanna Jarzębska
- Department of Immunology, Rheumatology and Allergy; Healthy Ageing Research Centre, Medical University of Lodz, Lodz, Poland
| | - Małgorzata Brauncajs
- Department of Immunology, Rheumatology and Allergy; Healthy Ageing Research Centre, Medical University of Lodz, Lodz, Poland
| | - Anna Głobińska
- Department of Immunology, Rheumatology and Allergy; Healthy Ageing Research Centre, Medical University of Lodz, Lodz, Poland
| | - Paweł Górski
- Department of Pneumonology and Allergy, Medical University of Lodz, Lodz, Poland
| | - Nikolaos G Papadopoulos
- Allergy Research Centre, 2nd Pediatric Clinic, National Kapodistrian, University of Athens, Athens, Greece
| | - Michael R Edwards
- National Heart and Lung Institute, Imperial College London, London, UK; Asthma UK Centre in Allergic Mechanisms of Asthma
| | - Sebastian L Johnston
- National Heart and Lung Institute, Imperial College London, London, UK; Asthma UK Centre in Allergic Mechanisms of Asthma
| | - Marek L Kowalski
- Department of Immunology, Rheumatology and Allergy; Healthy Ageing Research Centre, Medical University of Lodz, Lodz, Poland.
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Novel Models to Study Stromal Cell-Leukocyte Interactions in Health and Disease. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1060:131-146. [PMID: 30155626 DOI: 10.1007/978-3-319-78127-3_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
To study human immunology in general and stromal immunology in particular, it is highly motivated to move from monolayers to 3D cultures, such as organotypic models, that better mimic the function of living tissue. These models can potentially contain most if not all cell types present in tissues, in combination with different extracellular matrix components that can critically affect cell phenotype. Besides their well-established use in studies of tissue-specific cells, such as epithelial cells, endothelial cells and stromal fibroblasts in combination with extracellular components, these models have also been shown to be valuable to study how tissue participates in the regulation of leukocyte differentiation and function. Organotypic models with leukocytes represent novel powerful tools to study human stromal immunology and mechanisms involved in the regulation of leukocyte functions and inflammatory processes in human health and disease. In particular, these models are robust, long-lived and reproducible and allow monitoring of disease progression in real time, as well as the mixing of cellular constituents from healthy and pathological tissues. These models are also easy to manipulate, either genetically or by adding external stimulants, such as cytokines and pathogens, to mimic pathological conditions. It is thus not surprising that these models are proposed to be useful in toxicology screening assays, evaluating therapeutic efficacy of drugs and antibiotics, as well as in personalized medicine. Within this chapter, the most recent developments in creating organotypic models for the purpose of study of human leukocyte and stromal cell interactions, in health and disease, will be discussed, in particular focusing on live imaging. Special emphasis will be given on an organotypic model resembling human lung and its usefulness in studying the fine control of physiological and pathological processes in human health and disease. Using these models in studies on human stromal cell and leukocyte interactions will likely help identifying novel disease traits and may point out new potential targets to monitor and treat human diseases.
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Menzel M, Akbarshahi H, Mahmutovic Persson I, Puthia M, Bjermer L, Uller L. Caspase-1 deficiency reduces eosinophilia and interleukin-33 in an asthma exacerbation model. ERJ Open Res 2017; 3:00047-2017. [PMID: 29204432 PMCID: PMC5703353 DOI: 10.1183/23120541.00047-2017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 08/07/2017] [Indexed: 12/21/2022] Open
Abstract
Rhinovirus infections are common triggers of asthma exacerbations. Viruses can activate the inflammasome, resulting in processing and activation of caspase-1. This recruitment triggers production of interleukin (IL)-1β and IL-18, which have been implicated in asthma. Elucidating the involvement of the inflammasome and its compartments, such as caspase-1, in asthma exacerbations is warranted. Gene expression of caspase-1 was measured in rhinovirus-infected primary bronchial epithelial cells of asthmatic and healthy donors 24 h post-infection. In an in vivo exacerbation experiment C57BL/6 wild-type and caspase-1-/- mice were challenged with house dust mite followed by exposures to the viral mimic poly(I:C). General lung inflammatory parameters and levels of T-helper type 2 (Th2)-upstream cytokines IL-33, thymic stromal lymphopoietin (TSLP) and IL-25 were assessed. Caspase-1 expression was elevated after rhinoviral infection exclusively in bronchial epithelial cells from asthmatics. In a translational mouse model of asthma exacerbation effects of caspase-1 on airway inflammation and Th2-upstream cytokines were explored. Caspase-1 deficient mice exhibited no alterations of general lung inflammatory parameters, but showed markedly reduced eosinophilia. Furthermore, the Th2-upstream cytokines IL-33, TSLP and IL-25 were reduced at exacerbation in mice lacking caspase-1. Rhinovirus infection increases bronchial epithelial caspase-1 in asthma. Caspase-1 may induce production of lung Th2-upstream cytokines and eosinophilia at exacerbations. Further targeting of caspase-1 signalling is warranted to explore its role in asthma exacerbations. Lack of caspase-1 reduces eosinophilia and expression of Th2-upstream cytokines at experimental asthma exacerbationhttp://ow.ly/NPMK30eMV2E
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Affiliation(s)
- Mandy Menzel
- Respiratory Immunopharmacology, Dept of Experimental Medical Science, Lund University, Lund, Sweden
| | - Hamid Akbarshahi
- Respiratory Immunopharmacology, Dept of Experimental Medical Science, Lund University, Lund, Sweden
| | - Irma Mahmutovic Persson
- Respiratory Immunopharmacology, Dept of Experimental Medical Science, Lund University, Lund, Sweden
| | - Manoj Puthia
- Dept of Microbiology, Immunology and Glycobiology, Institute of Laboratory Medicine, Lund University, Lund, Sweden
| | - Leif Bjermer
- Respiratory Medicine and Allergology, Dept of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Lena Uller
- Respiratory Immunopharmacology, Dept of Experimental Medical Science, Lund University, Lund, Sweden
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Edwards MR, Strong K, Cameron A, Walton RP, Jackson DJ, Johnston SL. Viral infections in allergy and immunology: How allergic inflammation influences viral infections and illness. J Allergy Clin Immunol 2017; 140:909-920. [PMID: 28987220 PMCID: PMC7173222 DOI: 10.1016/j.jaci.2017.07.025] [Citation(s) in RCA: 152] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Revised: 07/20/2017] [Accepted: 07/31/2017] [Indexed: 12/20/2022]
Abstract
Viral respiratory tract infections are associated with asthma inception in early life and asthma exacerbations in older children and adults. Although how viruses influence asthma inception is poorly understood, much research has focused on the host response to respiratory viruses and how viruses can promote; or how the host response is affected by subsequent allergen sensitization and exposure. This review focuses on the innate interferon-mediated host response to respiratory viruses and discusses and summarizes the available evidence that this response is impaired or suboptimal. In addition, the ability of respiratory viruses to act in a synergistic or additive manner with TH2 pathways will be discussed. In this review we argue that these 2 outcomes are likely linked and discuss the available evidence that shows reciprocal negative regulation between innate interferons and TH2 mediators. With the renewed interest in anti-TH2 biologics, we propose a rationale for why they are particularly successful in controlling asthma exacerbations and suggest ways in which future clinical studies could be used to find direct evidence for this hypothesis.
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Affiliation(s)
- Michael R Edwards
- COPD & Asthma Section, National Heart Lung Institute, Imperial College London, London, United Kingdom; MRC & Asthma UK Centre for Allergic Mechanisms of Asthma, London, United Kingdom.
| | - Katherine Strong
- COPD & Asthma Section, National Heart Lung Institute, Imperial College London, London, United Kingdom; MRC & Asthma UK Centre for Allergic Mechanisms of Asthma, London, United Kingdom
| | - Aoife Cameron
- COPD & Asthma Section, National Heart Lung Institute, Imperial College London, London, United Kingdom; MRC & Asthma UK Centre for Allergic Mechanisms of Asthma, London, United Kingdom
| | - Ross P Walton
- COPD & Asthma Section, National Heart Lung Institute, Imperial College London, London, United Kingdom; MRC & Asthma UK Centre for Allergic Mechanisms of Asthma, London, United Kingdom
| | - David J Jackson
- COPD & Asthma Section, National Heart Lung Institute, Imperial College London, London, United Kingdom; MRC & Asthma UK Centre for Allergic Mechanisms of Asthma, London, United Kingdom; Guy's & St Thomas's Hospital London, London, United Kingdom
| | - Sebastian L Johnston
- COPD & Asthma Section, National Heart Lung Institute, Imperial College London, London, United Kingdom; MRC & Asthma UK Centre for Allergic Mechanisms of Asthma, London, United Kingdom
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Lander JM, Supp DM, He H, Martin LJ, Chen X, Weirauch MT, Boyce ST, Kopan R. Analysis of chromatin accessibility in human epidermis identifies putative barrier dysfunction-sensing enhancers. PLoS One 2017; 12:e0184500. [PMID: 28953906 PMCID: PMC5617145 DOI: 10.1371/journal.pone.0184500] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 08/24/2017] [Indexed: 01/12/2023] Open
Abstract
To identify putative gene regulatory regions that respond to epidermal injury, we mapped chromatin dynamics in a stratified human epidermis during barrier maturation and disruption. Engineered skin substitutes (ESS) cultured at the air-liquid interface were used as a model of developing human epidermis with incomplete barrier formation. The epidermal barrier stabilized following engraftment onto immunocompromised mice, and was compromised again upon injury. Modified formaldehyde-assisted isolation of regulatory elements (FAIRE) was used to identify accessible genomic regions characteristic of monolayer keratinocytes, ESS in vitro, grafted ESS, and tape-stripped ESS graft. We mapped differentiation- and maturation-associated changes in transcription factor binding sites enriched at each stage and observed overrepresentation of AP-1 gene family motifs in barrier-deficient samples. Transcription of TSLP, an important effector of immunological memory in response to allergen exposure, was dramatically elevated in our barrier-deficient samples. We identified dynamic DNA elements that correlated with TSLP induction and may contain enhancers that regulate TSLP. Two dynamic regions were located near the TSLP promoter and overlapped with allergy-associated SNPs rs17551370 and rs2289877, strongly implicating these loci in the regulation of TSLP expression in allergic disease. Additional dynamic chromatin regions ~250kb upstream of the TSLP promoter were found to be in high linkage disequilibrium with allergic disease SNPs. Taken together, these results define dynamic chromatin accessibility changes during epidermal development and dysfunction.
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Affiliation(s)
- Julie M. Lander
- Division of Developmental Biology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Dorothy M. Supp
- Research Department, Shriners Hospitals for Children, Cincinnati, Ohio, United States of America
- Department of Surgery, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Hua He
- Division of Human Genetics, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Lisa J. Martin
- Division of Human Genetics, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Xiaoting Chen
- Center for Autoimmune Genomics and Etiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Matthew T. Weirauch
- Division of Developmental Biology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
- Center for Autoimmune Genomics and Etiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, United States of America
- Division of Biomedical Informatics, Department of Pediatrics, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Steven T. Boyce
- Research Department, Shriners Hospitals for Children, Cincinnati, Ohio, United States of America
- Department of Surgery, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Raphael Kopan
- Division of Developmental Biology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
- * E-mail:
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Loxham M, Davies DE. Phenotypic and genetic aspects of epithelial barrier function in asthmatic patients. J Allergy Clin Immunol 2017; 139:1736-1751. [PMID: 28583446 PMCID: PMC5457128 DOI: 10.1016/j.jaci.2017.04.005] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/13/2017] [Accepted: 04/14/2017] [Indexed: 12/22/2022]
Abstract
The bronchial epithelium is continuously exposed to a multitude of noxious challenges in inhaled air. Cellular contact with most damaging agents is reduced by the action of the mucociliary apparatus and by formation of a physical barrier that controls passage of ions and macromolecules. In conjunction with these defensive barrier functions, immunomodulatory cross-talk between the bronchial epithelium and tissue-resident immune cells controls the tissue microenvironment and barrier homeostasis. This is achieved by expression of an array of sensors that detect a wide variety of viral, bacterial, and nonmicrobial (toxins and irritants) agents, resulting in production of many different soluble and cell-surface molecules that signal to cells of the immune system. The ability of the bronchial epithelium to control the balance of inhibitory and activating signals is essential for orchestrating appropriate inflammatory and immune responses and for temporally modulating these responses to limit tissue injury and control the resolution of inflammation during tissue repair. In asthmatic patients abnormalities in many aspects of epithelial barrier function have been identified. We postulate that such abnormalities play a causal role in immune dysregulation in the airways by translating gene-environment interactions that underpin disease pathogenesis and exacerbation.
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Affiliation(s)
- Matthew Loxham
- Clinical and Experimental Sciences and the Southampton NIHR Respiratory Biomedical Research Unit, University of Southampton Faculty of Medicine, Sir Henry Wellcome Laboratories, University Hospital Southampton, Southampton, United Kingdom
| | - Donna E Davies
- Clinical and Experimental Sciences and the Southampton NIHR Respiratory Biomedical Research Unit, University of Southampton Faculty of Medicine, Sir Henry Wellcome Laboratories, University Hospital Southampton, Southampton, United Kingdom.
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Edwards MR, Saglani S, Schwarze J, Skevaki C, Smith JA, Ainsworth B, Almond M, Andreakos E, Belvisi MG, Chung KF, Cookson W, Cullinan P, Hawrylowicz C, Lommatzsch M, Jackson D, Lutter R, Marsland B, Moffatt M, Thomas M, Virchow JC, Xanthou G, Edwards J, Walker S, Johnston SL. Addressing unmet needs in understanding asthma mechanisms: From the European Asthma Research and Innovation Partnership (EARIP) Work Package (WP)2 collaborators. Eur Respir J 2017; 49:49/5/1602448. [PMID: 28461300 DOI: 10.1183/13993003.02448-2016] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 03/13/2017] [Indexed: 12/27/2022]
Abstract
Asthma is a heterogeneous, complex disease with clinical phenotypes that incorporate persistent symptoms and acute exacerbations. It affects many millions of Europeans throughout their education and working lives and puts a heavy cost on European productivity. There is a wide spectrum of disease severity and control. Therapeutic advances have been slow despite greater understanding of basic mechanisms and the lack of satisfactory preventative and disease modifying management for asthma constitutes a significant unmet clinical need. Preventing, treating and ultimately curing asthma requires co-ordinated research and innovation across Europe. The European Asthma Research and Innovation Partnership (EARIP) is an FP7-funded programme which has taken a co-ordinated and integrated approach to analysing the future of asthma research and development. This report aims to identify the mechanistic areas in which investment is required to bring about significant improvements in asthma outcomes.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Rene Lutter
- Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Benjamin Marsland
- University of Lausanne, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | | | | | | | - Georgina Xanthou
- Biomedical Research Foundation, Academy of Athens, Athens, Greece
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Carsin A, Mazenq J, Ilstad A, Dubus JC, Chanez P, Gras D. Bronchial epithelium in children: a key player in asthma. Eur Respir Rev 2017; 25:158-69. [PMID: 27246593 PMCID: PMC9487245 DOI: 10.1183/16000617.0101-2015] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Accepted: 01/24/2016] [Indexed: 11/29/2022] Open
Abstract
Bronchial epithelium is a key element of the respiratory airways. It constitutes the interface between the environment and the host. It is a physical barrier with many chemical and immunological properties. The bronchial epithelium is abnormal in asthma, even in children. It represents a key component promoting airway inflammation and remodelling that can lead to chronic symptoms. In this review, we present an overview of bronchial epithelium and how to study it, with a specific focus on children. We report physical, chemical and immunological properties from ex vivo and in vitro studies. The responses to various deleterious agents, such as viruses or allergens, may lead to persistent abnormalities orchestrated by bronchial epithelial cells. As epithelium dysfunctions occur early in asthma, reprogramming the epithelium may represent an ambitious goal to induce asthma remission in children. Bronchial epithelium is a morphological and functional dysregulated gatekeeper in asthmatic childrenhttp://ow.ly/Y4MaM
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Affiliation(s)
- Ania Carsin
- Unité de Pneumologie Pédiatrique, hôpital Timone-Enfants, Assistance Publique Hopitaux de Marseille, Marseille, France UMR Inserm U1067 CNRS 7333, Aix Marseille University, Marseille, France
| | - Julie Mazenq
- Unité de Pneumologie Pédiatrique, hôpital Timone-Enfants, Assistance Publique Hopitaux de Marseille, Marseille, France UMR Inserm U1067 CNRS 7333, Aix Marseille University, Marseille, France
| | - Alexandra Ilstad
- UMR Inserm U1067 CNRS 7333, Aix Marseille University, Marseille, France
| | - Jean-Christophe Dubus
- CNRS, URMITE 6236, CHU Timone-Enfants, Aix-Marseille Université, Unité de pneumologie et médecine infantile, Marseille, France
| | - Pascal Chanez
- UMR Inserm U1067 CNRS 7333, Aix Marseille University, Marseille, France Clinique des bronches, Allergie et Sommeil, Hôpital Nord, Assistance Publique Hopitaux de Marseille, Marseille, France
| | - Delphine Gras
- UMR Inserm U1067 CNRS 7333, Aix Marseille University, Marseille, France
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Airway Epithelial Orchestration of Innate Immune Function in Response to Virus Infection. A Focus on Asthma. Ann Am Thorac Soc 2017; 13 Suppl 1:S55-63. [PMID: 27027954 DOI: 10.1513/annalsats.201507-421mg] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Asthma is a very common respiratory condition with a worldwide prevalence predicted to increase. There are significant differences in airway epithelial responses in asthma that are of particular interest during exacerbations. Preventing exacerbations is a primary aim when treating asthma because they often necessitate unscheduled healthcare visits and hospitalizations and are a significant cause of morbidity and mortality. The most common cause of asthma exacerbations is a respiratory virus infection, of which the most likely type is rhinovirus infection. This article focuses on the role played by the epithelium in orchestrating the innate immune responses to respiratory virus infection. Recent studies show impaired bronchial epithelial cell innate antiviral immune responses, as well as augmentation of a pro-Th2 response characterized by the epithelial-derived cytokines IL-25 and IL-33, crucial in maintaining the Th2 cytokine response to virus infection in asthma. A better understanding of the mechanisms of these abnormal immune responses has the potential to lead to the development of novel therapeutic targets for virus-induced exacerbations. The aim of this article is to highlight current knowledge regarding the role of viruses and immune modulation in the asthmatic epithelium and to discuss exciting areas for future research and novel treatments.
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Bjerregaard A, Laing IA, Poulsen N, Backer V, Sverrild A, Fally M, Khoo SK, Barrett L, Baltic S, Thompson PJ, Chidlow G, Sikazwe C, Smith DW, Bochkov YA, Le Souëf P, Porsbjerg C. Characteristics associated with clinical severity and inflammatory phenotype of naturally occurring virus-induced exacerbations of asthma in adults. Respir Med 2016; 123:34-41. [PMID: 28137494 PMCID: PMC5462105 DOI: 10.1016/j.rmed.2016.12.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 12/05/2016] [Accepted: 12/16/2016] [Indexed: 11/29/2022]
Abstract
Background In experimental studies viral infections have been shown to induce type 2 inflammation in asthmatics, but whether this is a feature of naturally occurring virus-induced asthma exacerbations is unknown. Thymic stromal lymphopoietin (TSLP) released from the airway epithelium in response to damage, has been suggested as a link between viral infection and type 2 inflammation, but the role of TSLP in asthma exacerbations is unknown. Objective To assess whether type 2 inflammation, as measured by sputum eosinophils and fractional exhaled nitric oxide (FeNO), is a feature of naturally occurring virus-induced exacerbations of asthma and whether TSLP is associated with this type 2 inflammation. Methods Patients presenting to hospital with acute asthma were examined during the exacerbation, and after 4 weeks recovery. The assessments included spirometry, FeNO and induced sputum for differential counts and TSLP mRNA levels. Nasal swabs were collected for viral detection. Results Sputum eosinophils and FeNO were similar between virus-positive (n = 44) and negative patients (n = 44). In virus-positive patients, TSLP expression was lower at exacerbation than follow-up (p = 0.03). High TSLP at exacerbation was associated with lower sputum eosinophils (p = 0.01) and higher FEV1 (p = 0.03). In virus-positive patients, %-predicted FEV1 negatively correlated with both FeNO and sputum eosinophils (p = 0.02 and p = 0.05, respectively). Conclusion Our findings support that type 2 inflammation is present in patients during virus-induced asthma exacerbations, to the same degree as non-viral exacerbations, and correlate negatively with FEV1. However, in virus-positive patients, high TSLP expression during exacerbation was associated with low sputum eosinophils, suggesting that the effect of TSLP in vivo, in the setting of an asthma exacerbation, might be different than the type 2 inducing effects observed in experimental studies. Sputum eosinophils and FeNO are similar in virus-induced and non-viral exacerbations. Sputum eosinophils and FeNO correlate with FEV1 during exacerbation. TSLP correlate negatively with sputum eosinophils during virus-induced exacerbations.
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Affiliation(s)
- Asger Bjerregaard
- Respiratory Research Unit, Bispebjerg University Hospital, Copenhagen, Denmark; Telethon Kids Institute, Perth, Australia; School of Paediatrics & Child Health, University of Western Australia, Perth, Australia.
| | - Ingrid A Laing
- Telethon Kids Institute, Perth, Australia; School of Paediatrics & Child Health, University of Western Australia, Perth, Australia
| | - Nadia Poulsen
- Respiratory Research Unit, Bispebjerg University Hospital, Copenhagen, Denmark; Telethon Kids Institute, Perth, Australia; School of Paediatrics & Child Health, University of Western Australia, Perth, Australia
| | - Vibeke Backer
- Respiratory Research Unit, Bispebjerg University Hospital, Copenhagen, Denmark
| | - Asger Sverrild
- Respiratory Research Unit, Bispebjerg University Hospital, Copenhagen, Denmark
| | - Markus Fally
- Respiratory Research Unit, Bispebjerg University Hospital, Copenhagen, Denmark
| | - Siew-Kim Khoo
- Telethon Kids Institute, Perth, Australia; School of Paediatrics & Child Health, University of Western Australia, Perth, Australia
| | - Lucy Barrett
- Institute for Respiratory Health, University of Western Australia, Perth, Australia
| | - Svetlana Baltic
- Institute for Respiratory Health, University of Western Australia, Perth, Australia
| | - Philip J Thompson
- Institute for Respiratory Health, University of Western Australia, Perth, Australia
| | - Glenys Chidlow
- Department of Microbiology, PathWest Laboratory Medicine WA, Nedlands, Australia
| | - Chisha Sikazwe
- Department of Microbiology, PathWest Laboratory Medicine WA, Nedlands, Australia; School of Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
| | - David W Smith
- Telethon Kids Institute, Perth, Australia; Department of Microbiology, PathWest Laboratory Medicine WA, Nedlands, Australia; School of Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
| | - Yury A Bochkov
- Department of Pediatrics, School of Medicine and Public Health, University of Wisconsin, USA
| | - Peter Le Souëf
- School of Paediatrics & Child Health, University of Western Australia, Perth, Australia
| | - Celeste Porsbjerg
- Respiratory Research Unit, Bispebjerg University Hospital, Copenhagen, Denmark
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Hagmann BR, Odermatt A, Kaufmann T, Dahinden CA, Fux M. Balance between IL-3 and type Iinterferons and their interrelationship with FasL dictates lifespan and effector functions of human basophils. Clin Exp Allergy 2016; 47:71-84. [PMID: 27910206 DOI: 10.1111/cea.12850] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 09/13/2016] [Accepted: 10/10/2016] [Indexed: 12/19/2022]
Abstract
BACKGROUND In contrast to eosinophils and neutrophils, the regulation of the lifespan of human basophils is poorly defined, with the exception of the potent anti-apoptotic effect of IL-3 that also promotes pro-inflammatory effector functions and phenotypic changes. Type I IFNs (IFN-α, IFN-β), which are well known for their anti-viral activities, have the capacity to inhibit allergic inflammation. OBJECTIVE To elucidate whether type I IFNs have the potential to abrogate the lifespan and/or effector functions of human basophils. METHODS We cultured human basophils, and for comparison, eosinophils and neutrophils, with IL-3, interferons, FasL and TRAIL, alone or in combination, and studied cell survival, effector functions and signalling pathways involved. RESULTS Despite an identical pattern of early signalling in basophils, eosinophils and neutrophils in response to different types of interferons, only basophils displayed enhanced apoptosis after type I IFN treatment. IFN-γ prolonged survival of eosinophils but did not affect the lifespan of basophils. IFN-α-mediated apoptosis required STAT1-STAT2 heterodimers and the contribution of constitutive p38 MAPK activity. Whereas the death ligands FasL and TRAIL-induced apoptosis in basophils per se, IFN-α-mediated apoptosis did neither involve autocrine TRAIL signalling nor did it sensitize basophils to FasL-induced apoptosis. However, IFN-α and FasL displayed an additive effect in killing basophils. Interestingly, IL-3, which protected basophils from IFN-α-, TRAIL- or FasL-mediated apoptosis, did not completely block the additive effect of combined IFN-α and FasL treatment. Moreover, we demonstrate that IFN-α suppressed IL-3-induced release of IL-8 and IL-13. In contrast to IFN-α-mediated apoptosis, these inhibitory effects of IFN-α were not dependent on p38 MAPK signalling. CONCLUSIONS AND CLINICAL RELEVANCE Our study defines the unique and granulocyte-type-specific inhibitory and pro-apoptotic function of type I IFNs and their cooperation with death ligands in human blood basophils, which may be relevant for the anti-allergic properties of type I IFNs.
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Affiliation(s)
- B R Hagmann
- University Institute of Clinical Chemistry, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,University Institute of Immunology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - A Odermatt
- University Institute of Clinical Chemistry, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,University Institute of Immunology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - T Kaufmann
- Institute of Pharmacology, University of Bern, Bern, Switzerland
| | - C A Dahinden
- University Institute of Immunology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - M Fux
- University Institute of Clinical Chemistry, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,University Institute of Immunology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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Song DJ. Rhinovirus and childhood asthma: an update. KOREAN JOURNAL OF PEDIATRICS 2016; 59:432-439. [PMID: 27895690 PMCID: PMC5118502 DOI: 10.3345/kjp.2016.59.11.432] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 10/18/2015] [Accepted: 10/23/2015] [Indexed: 01/26/2023]
Abstract
Asthma is recognized as a complex disease resulting from interactions between multiple genetic and environmental factors. Accumulating evidence suggests that respiratory viral infections in early life constitute a major environmental risk factor for the development of childhood asthma. Respiratory viral infections have also been recognized as the most common cause of asthma exacerbation. The advent of molecular diagnostics to detect respiratory viruses has provided new insights into the role of human rhinovirus (HRV) infections in the pathogenesis of asthma. However, it is still unclear whether HRV infections cause asthma or if wheezing with HRV infection is simply a predictor of childhood asthma. Recent clinical and experimental studies have identified plausible pathways by which HRV infection could cause asthma, particularly in a susceptible host, and exacerbate disease. Airway epithelial cells, the primary site of infection and replication of HRV, play a key role in these processes. Details regarding the role of genetic factors, including ORMDL3, are beginning to emerge. This review discusses recent clinical and experimental evidence for the role of HRV infection in the development and exacerbation of childhood asthma and the potential underlying mechanisms that have been proposed.
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Affiliation(s)
- Dae Jin Song
- Department of Pediatrics, Korea University College of Medicine, Seoul, Korea.; Environmental Health Center for Childhood Asthma, Korea University Anam Hospital, Seoul, Korea
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50
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Abstract
The interaction between the airway epithelium and the inhaled environment is crucial to understanding the pathobiology of asthma. Several studies have identified an important role of airway epithelial-derived cytokines, IL-25, IL-33, and thymic stromal lymphopoietin (TSLP) in asthma pathogenesis. These cytokines have been described as epithelial-derived alarmins that activate and potentiate the innate and humoral arms of the immune system in the presence of actual or perceived damage. Each of the three epithelial-derived alarmins has been implicated in the pathobiology of inhaled allergen-induced airway responses. The best evidence to date exists for TSLP, in that a human monoclonal antibody, which binds TSLP and prevents its engagement with its receptor, resolves airway inflammation in patients with allergic asthma and attenuates allergen-induced airway responses. Better understanding the roles that the epithelial-derived alarmins play and how they influence airway immune response may allow the development of novel therapeutics for asthma treatment.
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Affiliation(s)
- Patrick D Mitchell
- Firestone Institute of Respiratory Health and the Department of Medicine, Michael G DeGroote School of Medicine, McMaster University, Hamilton, ON, Canada
| | - Paul M O'Byrne
- Firestone Institute of Respiratory Health and the Department of Medicine, Michael G DeGroote School of Medicine, McMaster University, Hamilton, ON, Canada.
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