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Bu T, Wang LF, Yin YQ. How Do Innate Immune Cells Contribute to Airway Remodeling in COPD Progression? Int J Chron Obstruct Pulmon Dis 2020; 15:107-116. [PMID: 32021149 PMCID: PMC6966950 DOI: 10.2147/copd.s235054] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 12/19/2019] [Indexed: 12/12/2022] Open
Abstract
Recently, the therapeutic potential of immune-modulation during the progression of chronic obstructive pulmonary disease (COPD) has been attracting increasing interest. However, chronic inflammatory response has been over-simplified in descriptions of the mechanism of COPD progression. As a form of first-line airway defense, epithelial cells exhibit phenotypic alteration, and participate in epithelial layer disorganization, mucus hypersecretion, and extracellular matrix deposition. Dendritic cells (DCs) exhibit attenuated antigen-presenting capacity in patients with advanced COPD. Immature DCs migrate into small airways, where they promote a pro-inflammatory microenvironment and bacterial colonization. In response to damage-associated molecular patterns (DAMPs) in lung tissue affected by COPD, neutrophils are excessively recruited and activated, where they promote a proteolytic microenvironment and fibrotic repair in small airways. Macrophages exhibit decreased phagocytosis in the large airways, while they demonstrate high pro-inflammatory potential in the small airways, and mediate alveolar destruction and chronic airway inflammation. Natural killer T (NKT) cells, eosinophils, and mast cells also play supplementary roles in COPD progression; however, their cellular activities are not yet entirely clear. Overall, during COPD progression, “exhausted” innate immune responses can be observed in the large airways. On the other hand, the innate immune response is enhanced in the small airways. Approaches that inhibit the inflammatory cascade, chemotaxis, or the activation of inflammatory cells could possibly delay the progression of airway remodeling in COPD, and may thus have potential clinical significance.
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Affiliation(s)
- Tegeleqi Bu
- Department of Anesthesiology, China-Japan Friendship Hospital, Beijing, People's Republic of China
| | - Li Fang Wang
- Department of Anesthesiology, China-Japan Friendship Hospital, Beijing, People's Republic of China
| | - Yi Qing Yin
- Department of Anesthesiology, China-Japan Friendship Hospital, Beijing, People's Republic of China
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Kota A, Deshpande DA, Haghi M, Oliver B, Sharma P. Autophagy and airway fibrosis: Is there a link? F1000Res 2017; 6:409. [PMID: 28815017 PMCID: PMC5416906 DOI: 10.12688/f1000research.11236.2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/06/2018] [Indexed: 12/14/2022] Open
Abstract
In the past decade, an emerging process named “autophagy” has generated intense interest in many chronic lung diseases. Tissue remodeling and fibrosis is a common feature of many airway diseases, and current therapies do not prevent or reverse these structural changes. Autophagy has evolved as a conserved process for bulk degradation and recycling of cytoplasmic components to maintain basal cellular homeostasis and healthy organelle populations in the cell. Furthermore, autophagy serves as a cell survival mechanism and can also be induced by chemical and physical stress to the cell. Accumulating evidence demonstrates that autophagy plays an essential role in vital cellular processes, including tissue remodeling. This review will discuss some of the recent advancements made in understanding the role of this fundamental process in airway fibrosis with emphasis on airway remodeling, and how autophagy can be exploited as a target for airway remodeling in asthma and chronic obstructive pulmonary disease.
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Affiliation(s)
- Anudeep Kota
- Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia.,Woolcock Emphysema Centre, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW, 2037, Australia.,Graduate School of Health, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Deepak A Deshpande
- Centre for Translational Medicine, Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Mehra Haghi
- Graduate School of Health, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Brian Oliver
- Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia.,Woolcock Emphysema Centre, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW, 2037, Australia
| | - Pawan Sharma
- Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia.,Woolcock Emphysema Centre, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW, 2037, Australia
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Kota A, Deshpande DA, Haghi M, Oliver B, Sharma P. Autophagy and airway fibrosis: Is there a link? F1000Res 2017; 6:409. [PMID: 28815017 PMCID: PMC5416906 DOI: 10.12688/f1000research.11236.1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/06/2018] [Indexed: 09/15/2023] Open
Abstract
In the past decade, an emerging process named "autophagy" has generated intense interest in many chronic lung diseases. Tissue remodeling and fibrosis is a common feature of many airway diseases, and current therapies do not prevent or reverse these structural changes. Autophagy has evolved as a conserved process for bulk degradation and recycling of cytoplasmic components to maintain basal cellular homeostasis and healthy organelle populations in the cell. Furthermore, autophagy serves as a cell survival mechanism and can also be induced by chemical and physical stress to the cell. Accumulating evidence demonstrates that autophagy plays an essential role in vital cellular processes, including tissue remodeling. This review will discuss some of the recent advancements made in understanding the role of this fundamental process in airway fibrosis with emphasis on airway remodeling, and how autophagy can be exploited as a target for airway remodeling in asthma and chronic obstructive pulmonary disease.
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Affiliation(s)
- Anudeep Kota
- Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
- Woolcock Emphysema Centre, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW, 2037, Australia
- Graduate School of Health, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Deepak A. Deshpande
- Centre for Translational Medicine, Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Mehra Haghi
- Graduate School of Health, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Brian Oliver
- Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
- Woolcock Emphysema Centre, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW, 2037, Australia
| | - Pawan Sharma
- Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
- Woolcock Emphysema Centre, Woolcock Institute of Medical Research, The University of Sydney, Sydney, NSW, 2037, Australia
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Andersson A, Malmhäll C, Houltz B, Tengvall S, Sjöstrand M, Qvarfordt I, Lindén A, Bossios A. Interleukin-16-producing NK cells and T-cells in the blood of tobacco smokers with and without COPD. Int J Chron Obstruct Pulmon Dis 2016; 11:2245-2258. [PMID: 27695312 PMCID: PMC5029848 DOI: 10.2147/copd.s103758] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Background Long-term exposure to tobacco smoke causes local inflammation in the airways that involves not only innate immune cells, including NK cells, but also adaptive immune cells such as cytotoxic (CD8+) and helper (CD4+) T-cells. We have previously demonstrated that long-term tobacco smoking increases extracellular concentration of the CD4+-recruiting cytokine interleukin (IL)-16 locally in the airways. Here, we hypothesized that tobacco smoking alters IL-16 biology at the systemic level and that this effect involves oxygen free radicals (OFR). Methods We quantified extracellular IL-16 protein (ELISA) and intracellular IL-16 in NK cells, T-cells, B-cells, and monocytes (flow cytometry) in blood samples from long-term tobacco smokers with and without chronic obstructive pulmonary disease (COPD) and in never-smokers. NK cells from healthy blood donors were stimulated with water-soluble tobacco smoke components (cigarette smoke extract) with or without an OFR scavenger (glutathione) in vitro and followed by quantification of IL-16 protein. Results The extracellular concentrations of IL-16 protein in blood did not display any substantial differences between groups. Notably, intracellular IL-16 protein was detected in all types of blood leukocytes. All long-term smokers displayed a decrease in this IL-16 among NK cells, irrespective of COPD status. Further, both NK and CD4+ T-cell concentrations displayed a negative correlation with pack-years. Moreover, cigarette smoke extract caused release of IL-16 protein from NK cells in vitro, and this was not affected by glutathione, in contrast to the decrease in intracellular IL-16, which was prevented by this drug. Conclusion Long-term exposure to tobacco smoke does not markedly alter extracellular concentrations of IL-16 protein in blood. However, it does decrease the intracellular IL-16 concentrations in blood NK cells, the latter effect involving OFR. Thus, long-term tobacco smoking exerts an impact at the systemic level that involves NK cells; innate immune cells that are critical for host defense against viruses and tumors – conditions that are overrepresented among smokers.
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Affiliation(s)
- Anders Andersson
- Respiratory Medicine and Allergology, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Carina Malmhäll
- Krefting Research Center, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Birgitta Houltz
- Respiratory Medicine and Allergology, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Sara Tengvall
- Respiratory Medicine and Allergology, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Margareta Sjöstrand
- Krefting Research Center, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Ingemar Qvarfordt
- Respiratory Medicine and Allergology, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Anders Lindén
- Unit for Lung and Airway Research, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Apostolos Bossios
- Krefting Research Center, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
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Postiaux G. La kinésithérapie respiratoire du poumon profond. Bases mécaniques d’un nouveau paradigme. Rev Mal Respir 2014; 31:552-67. [PMID: 25012039 DOI: 10.1016/j.rmr.2013.11.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Accepted: 11/25/2013] [Indexed: 10/25/2022]
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Devillier P, Jebrak G, Morel H, Chinet T, Didier A, Roche N. [Treatment of distal airways involvement in COPD]. Rev Mal Respir 2011; 28:1340-56. [PMID: 22152941 DOI: 10.1016/j.rmr.2011.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2011] [Accepted: 08/06/2011] [Indexed: 11/18/2022]
Abstract
INTRODUCTION The current pharmacological treatment of COPD provides only partial beneficial effects on symptoms, exercise tolerance, frequency of exacerbations and quality of life. This could be related to poor targeting of the distal airways by current treatments, yet these airways are particularly involved in airflow obstruction and its consequences such as hyperinflation. BACKGROUND Many treatments used in COPD could have effects on distal airways, including bronchodilators, corticosteroids, mucolytics and antibiotics. However, these possible effects remain poorly understood. VIEWPOINTS New treatments targeting more specifically the mechanisms of inflammation, oxidative stress and tissue remodeling that characterize COPD, could prove useful in its management, but most are still only in the early stages of their development. Advances could also come from improvements in inhalation devices, delivering more of the medication to the distal airways. CONCLUSIONS Improvement in the management of COPD could come from progress in terms of both molecules and their mode of administration.
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Affiliation(s)
- P Devillier
- UPRES EA 220, pôle des maladies respiratoires, hôpital Foch, 11 rue Guillaume-Lenoir, Suresnes, France
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