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Zheng W, Zhou Z, Guo X, Zuo X, Zhang J, An Y, Zheng H, Yue Y, Wang G, Wang F. Efferocytosis and Respiratory Disease. Int J Mol Sci 2023; 24:14871. [PMID: 37834319 PMCID: PMC10573909 DOI: 10.3390/ijms241914871] [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: 08/29/2023] [Revised: 09/26/2023] [Accepted: 09/29/2023] [Indexed: 10/15/2023] Open
Abstract
Cells are the smallest units that make up living organisms, which constantly undergo the processes of proliferation, differentiation, senescence and death. Dead cells need to be removed in time to maintain the homeostasis of the organism and keep it healthy. This process is called efferocytosis. If the process fails, this may cause different types of diseases. More and more evidence suggests that a faulty efferocytosis process is closely related to the pathological processes of respiratory diseases. In this review, we will first introduce the process and the related mechanisms of efferocytosis of the macrophage. Secondly, we will propose some methods that can regulate the function of efferocytosis at different stages of the process. Next, we will discuss the role of efferocytosis in different lung diseases and the related treatment approaches. Finally, we will summarize the drugs that have been applied in clinical practice that can act upon efferocytosis, in order to provide new ideas for the treatment of lung diseases.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Guoqiang Wang
- The Key Laboratory of Pathobiology, Ministry of Education, College of Basic Medical Sciences, Jilin University, Changchun 130021, China; (W.Z.); (Z.Z.); (X.G.); (X.Z.); (J.Z.); (Y.A.); (H.Z.); (Y.Y.)
| | - Fang Wang
- The Key Laboratory of Pathobiology, Ministry of Education, College of Basic Medical Sciences, Jilin University, Changchun 130021, China; (W.Z.); (Z.Z.); (X.G.); (X.Z.); (J.Z.); (Y.A.); (H.Z.); (Y.Y.)
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2
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Pourali F, Khademloo M, Abedi S, Roozbeh F, Barzegari S, Moosazadeh M. Relationship between smoking and tuberculosis recurrence: A systematic review and meta-analysis. Indian J Tuberc 2023; 70:475-482. [PMID: 37968054 DOI: 10.1016/j.ijtb.2023.04.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 04/02/2023] [Accepted: 04/10/2023] [Indexed: 11/17/2023]
Abstract
INTRODUCTION Of the problems in tuberculosis (TB) control program is the recurrence of this disease. In some studies, smoking has been reported as the most important risk factor. Therefore, the present study aimed at examining the association between smoking and tuberculosis recurrence using meta-analysis. METHODS To report the findings of this meta-analysis, we used PRISMA. The protocol of this study has been recorded in PROSPERO. The research question has been formulated based on PICO, and the search was performed using both MeSH and non-MeSH keywords. After screening and selecting the articles and evaluating their quality using the NOS checklist, the overall estimate of the odds ratio of tuberculosis recurrence in smokers was assessed with a 95% confidence interval. RESULTS Fourteen studies met the inclusion criteria. The total number of samples in the group of patients with tuberculosis recurrence was 1988 with 855 (43%) smokers, and in the group of patients affected by tuberculosis without recurrence, it was 27,226 with 7503 (27.56%) smokers. In 13 studies, the odds ratio of tuberculosis recurrence was higher in smokers; this difference was statistically significant in 12 of them. Combining the results of these 14 studies, the odds ratio of tuberculosis recurrence in smokers was 2.10 times higher, using the random effects model (95% CI:1.69, 2.61). CONCLUSION Based on the results of study present, smoking increases the risk of tuberculosis recurrence. Therefore, to eradicate tuberculosis by 2030, more serious interventions should be taken to quit smoking, which in turn reduces the incidence of tuberculosis.
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Affiliation(s)
- Fatemeh Pourali
- Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Mohammad Khademloo
- Department of Community Medicine, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Siavosh Abedi
- Department of Internal Medicine, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Fatemeh Roozbeh
- Health Deputy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Saeed Barzegari
- Department of Paramedicine, Amol Faculty of Paramedical Sciences, Mazandaran University of Medical Sciences, Sari, Iran
| | - Mahmood Moosazadeh
- Gastrointestinal Cancer Research Center, Non-communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran.
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3
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Liu G, Jarnicki AG, Paudel KR, Lu W, Wadhwa R, Philp AM, Van Eeckhoutte H, Marshall JE, Malyla V, Katsifis A, Fricker M, Hansbro NG, Dua K, Kermani NZ, Eapen MS, Tiotiu A, Chung KF, Caramori G, Bracke K, Adcock IM, Sohal SS, Wark PA, Oliver BG, Hansbro PM. Adverse roles of mast cell chymase-1 in COPD. Eur Respir J 2022; 60:2101431. [PMID: 35777766 DOI: 10.1183/13993003.01431-2021] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 06/08/2022] [Indexed: 11/05/2022]
Abstract
BACKGROUND COPD is the third leading cause of death worldwide. Cigarette smoke (CS)-induced chronic inflammation inducing airway remodelling, emphysema and impaired lung function is the primary cause. Effective therapies are urgently needed. Human chymase (hCMA)1 and its orthologue mCMA1/mouse mast cell protease (mMCP)5 are exocytosed from activated mast cells and have adverse roles in numerous disorders, but their role in COPD is unknown. METHODS We evaluated hCMA1 levels in lung tissues of COPD patients. We used mmcp5-deficient (-/-) mice to evaluate this protease's role and potential for therapeutic targeting in CS-induced experimental COPD. In addition, we used ex vivo/in vitro studies to define mechanisms. RESULTS The levels of hCMA1 mRNA and CMA1+ mast cells were increased in lung tissues from severe compared to early/mild COPD patients, non-COPD smokers and healthy controls. Degranulated mast cell numbers and mMCP5 protein were increased in lung tissues of wild-type mice with experimental COPD. mmcp5 -/- mice were protected against CS-induced inflammation and macrophage accumulation, airway remodelling, emphysema and impaired lung function in experimental COPD. CS extract challenge of co-cultures of mast cells from wild-type, but not mmcp5 -/- mice with wild-type lung macrophages increased in tumour necrosis factor (TNF)-α release. It also caused the release of CMA1 from human mast cells, and recombinant hCMA-1 induced TNF-α release from human macrophages. Treatment with CMA1 inhibitor potently suppressed these hallmark features of experimental COPD. CONCLUSION CMA1/mMCP5 promotes the pathogenesis of COPD, in part, by inducing TNF-α expression and release from lung macrophages. Inhibiting hCMA1 may be a novel treatment for COPD.
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Affiliation(s)
- Gang Liu
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, Australia
| | - Andrew G Jarnicki
- Department of Pharmacology and Therapeutics, University of Melbourne, Parkville, Australia
| | - Keshav R Paudel
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, Australia
| | - Wenying Lu
- Respiratory Translational Research Group, Department of Laboratory Medicine, School of Health Sciences, University of Tasmania, Launceston, Australia
| | - Ridhima Wadhwa
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, Australia
| | - Ashleigh M Philp
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, Australia
- St Vincent's Medical School, University of New South Wales Medicine, University of New South Wales, Sydney, Australia
| | - Hannelore Van Eeckhoutte
- Laboratory for Translational Research in Obstructive Pulmonary Diseases, Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Jacqueline E Marshall
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, Australia
| | - Vamshikrishna Malyla
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, Australia
| | - Angelica Katsifis
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, Australia
| | - Michael Fricker
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Callaghan, Australia
| | - Nicole G Hansbro
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, Australia
| | - Kamal Dua
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, Australia
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, Ultimo, Australia
| | - Nazanin Z Kermani
- Data Science Institute, Department of Computing, Imperial College London, London, UK
| | - Mathew S Eapen
- Respiratory Translational Research Group, Department of Laboratory Medicine, School of Health Sciences, University of Tasmania, Launceston, Australia
| | - Angelica Tiotiu
- National Heart and Lung Institute, Imperial College London, London, UK
- Department of Pulmonology, University Hospital of Nancy, Nancy, France
| | - K Fan Chung
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Gaetano Caramori
- UOC di Pneumologia, Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali (BIOMORF), Università di Messina, Messina, Italy
| | - Ken Bracke
- Laboratory for Translational Research in Obstructive Pulmonary Diseases, Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Ian M Adcock
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Sukhwinder S Sohal
- Respiratory Translational Research Group, Department of Laboratory Medicine, School of Health Sciences, University of Tasmania, Launceston, Australia
| | - Peter A Wark
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Callaghan, Australia
| | - Brian G Oliver
- Woolcock Institute and School of Life Science, Faculty of Science Life Science, University of Technology Sydney, Sydney, Australia
| | - Philip M Hansbro
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, Australia
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Callaghan, Australia
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4
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Quan DH, Kwong AJ, Hansbro PM, Britton WJ. No smoke without fire: the impact of cigarette smoking on the immune control of tuberculosis. Eur Respir Rev 2022; 31:210252. [PMID: 35675921 PMCID: PMC9488690 DOI: 10.1183/16000617.0252-2021] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 03/20/2022] [Indexed: 12/12/2022] Open
Abstract
Cigarette smoke (CS) exposure is a key risk factor for both active and latent tuberculosis (TB). It is associated with delayed diagnosis, more severe disease progression, unfavourable treatment outcomes and relapse after treatment. Critically, CS exposure is common in heavily populated areas with a high burden of TB, such as China, India and the Russian Federation. It is therefore prudent to evaluate interventions for TB while taking into account the immunological impacts of CS exposure. This review is a mechanistic examination of how CS exposure impairs innate barrier defences, as well as alveolar macrophage, neutrophil, dendritic cell and T-cell functions, in the context of TB infection and disease.
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Affiliation(s)
- Diana H Quan
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Sydney, Australia
- D.H. Quan and W.J. Britton contributed equally to this article as lead authors and supervised the work
| | | | - Philip M Hansbro
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, Sydney, Australia
| | - Warwick J Britton
- Tuberculosis Research Program at the Centenary Institute, The University of Sydney, Sydney, Australia
- Dept of Clinical Immunology, Royal Prince Alfred Hospital, Sydney, Australia
- D.H. Quan and W.J. Britton contributed equally to this article as lead authors and supervised the work
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5
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DI Stefano A, Gnemmi I, Dossena F, Ricciardolo FL, Maniscalco M, Lo Bello F, Balbi B. Pathogenesis of COPD at the cellular and molecular level. Minerva Med 2022; 113:405-423. [PMID: 35138077 DOI: 10.23736/s0026-4806.22.07927-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Chronic inflammatory responses in the lung of patients with stable mild-to severe forms of COPD play a central role in the definition, comprehension and monitoring of the disease state. A better understanding of the COPD pathogenesis can't avoid a detailed knowledge of these inflammatory changes altering the functional health of the lung during the disease progression. We here summarize and discuss the role and principal functions of the inflammatory cells populating the large, small airways and lung parenchyma of patients with COPD of increasing severity in comparison with healthy control subjects: T and B lymphocytes, NK and Innate Lymphoid cells, macrophages, and neutrophils. The differential inflammatory distribution in large and small airways of patients is also discussed. Furthermore, relevant cellular mechanisms controlling the homeostasis and the "normal" balance of these inflammatory cells and of structural cells in the lung, such as autophagy, apoptosis, necroptosis and pyroptosis are as well presented and discussed in the context of the COPD severity.
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Affiliation(s)
- Antonino DI Stefano
- Divisione di Pneumologia e Laboratorio di Citoimmunopatologia dell'Apparato Cardio Respiratorio, Istituti Clinici Scientifici Maugeri, SpA, Società Benefit, IRCCS, Veruno, Novara, Italy -
| | - Isabella Gnemmi
- Divisione di Pneumologia e Laboratorio di Citoimmunopatologia dell'Apparato Cardio Respiratorio, Istituti Clinici Scientifici Maugeri, SpA, Società Benefit, IRCCS, Veruno, Novara, Italy
| | - Francesca Dossena
- Divisione di Pneumologia e Laboratorio di Citoimmunopatologia dell'Apparato Cardio Respiratorio, Istituti Clinici Scientifici Maugeri, SpA, Società Benefit, IRCCS, Veruno, Novara, Italy
| | - Fabio L Ricciardolo
- Rare Lung Disease Unit and Severe Asthma Centre, Department of Clinical and Biological Sciences, San Luigi Gonzaga University Hospital Orbassano, University of Turin, Turin, Italy
| | - Mauro Maniscalco
- Divisione di Pneumologia, Istituti Clinici Scientifici Maugeri, SpA, Società Benefit, IRCCS, Telese, Benevento, Italy
| | - Federica Lo Bello
- Pneumologia, Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali (BIOMORF), Università di Messina, Messina, Italy
| | - Bruno Balbi
- Divisione di Pneumologia e Laboratorio di Citoimmunopatologia dell'Apparato Cardio Respiratorio, Istituti Clinici Scientifici Maugeri, SpA, Società Benefit, IRCCS, Veruno, Novara, Italy
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6
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Nrf2 Is Required for Optimal Alveolar-Macrophage-Mediated Apoptotic Neutrophil Clearance after Oxidant Injury. Antioxidants (Basel) 2022; 11:antiox11020212. [PMID: 35204093 PMCID: PMC8868099 DOI: 10.3390/antiox11020212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/15/2022] [Accepted: 01/19/2022] [Indexed: 12/20/2022] Open
Abstract
Recognition and clearance of apoptotic cells by phagocytes (also known as efferocytosis), primarily mediated by macrophages, are essential to terminate lung inflammatory responses and promote tissue repair after injury. The Nrf2 transcription factor is crucial for cytoprotection and host defense. Previously, we showed sustained neutrophilic lung inflammation in Nrf2-deficient (Nrf2−/−) mice after hyperoxia-induced lung injury in vivo, but the mechanisms underlying this abnormal phenotype remain unclear. To examine whether Nrf2 regulates apoptotic neutrophil clearance, we used the alveolar macrophages (AMФs) and bone-marrow-derived macrophages (BMDMФs) of wild-type (WT) and Nrf2−/− mice. We found that the efferocytic ability of AMФ was impaired in hyperoxia-exposed mice’s lungs, but the effect was more pronounced in Nrf2−/− mice. Importantly, AMФ-mediated efferocytosis remained impaired in Nrf2−/− mice recovering from injury but was restored to the basal state in the wild-type counterparts. Hyperoxia affected apoptotic neutrophil binding, not internalization, in both WT and Nrf2−/− BMDMФs, but the effect was more significant in the latter cells. Augmenting Nrf2 activity restored hyperoxia attenuated efferocytosis in WT, but not in Nrf2−/− macrophages. However, the loss of Nrf2 in neutrophils affected their uptake by WT macrophages. Collectively, these results demonstrate that Nrf2 is required for optimal macrophage-mediated efferocytosis and that activating Nrf2 may provide a physiological way to accelerate apoptotic cell clearance after oxidant injury.
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7
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Tajbakhsh A, Gheibihayat SM, Mortazavi D, Medhati P, Rostami B, Savardashtaki A, Momtazi-Borojeni AA. The Effect of Cigarette Smoke Exposure on Efferocytosis in Chronic Obstructive Pulmonary Disease; Molecular Mechanisms and Treatment Opportunities. COPD 2021; 18:723-736. [PMID: 34865568 DOI: 10.1080/15412555.2021.1978419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Cigarette smoking-related inflammation, cellular stresses, and tissue destruction play a key role in lung disease, such as chronic obstructive pulmonary disease (COPD). Notably, augmented apoptosis and impaired clearance of apoptotic cells, efferocytosis, contribute to the chronic inflammatory response and tissue destruction in patients with COPD. Of note, exposure to cigarette smoke can impair alveolar macrophages efferocytosis activity, which leads to secondary necrosis formation and tissue inflammation. A better understanding of the processes behind the effect of cigarette smoke on efferocytosis concerning lung disorders can help to design more efficient treatment approaches and also delay the development of lung disease, such as COPD. To this end, we aimed to seek mechanisms underlying the impairing effect of cigarette smoke on macrophages-mediated efferocytosis in COPD. Further, available therapeutic opportunities for restoring efferocytosis activity and ameliorating respiratory tract inflammation in smokers with COPD were also discussed.
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Affiliation(s)
- Amir Tajbakhsh
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Mohammad Gheibihayat
- Department of Medical Genetics, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Deniz Mortazavi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Science, Isfahan, Iran
| | - Pourya Medhati
- Student research committee, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Behrouz Rostami
- Health & Treatment Center of Rostam, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Amir Savardashtaki
- Epilepsy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.,Department of Medical Biotechnology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Amir Abbas Momtazi-Borojeni
- Department of Medical Biotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Iran's National Elites Foundation, Tehran, Iran
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8
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Chen D, Gregory AD, Li X, Wei J, Burton CL, Gibson G, Scott SJ, St Croix CM, Zhang Y, Shapiro SD. RIP3-dependent necroptosis contributes to the pathogenesis of chronic obstructive pulmonary disease. JCI Insight 2021; 6:e144689. [PMID: 34156033 PMCID: PMC8262480 DOI: 10.1172/jci.insight.144689] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 05/12/2021] [Indexed: 12/27/2022] Open
Abstract
Necroptosis has emerged as a potential mechanism in the pathogenesis of chronic obstructive pulmonary disease (COPD). Here, we found that markers of necroptosis, including high mobility group box 1 release and phosphorylation of mixed lineage kinase domain-like protein (p-MLKL), were markedly induced in the late stage of cigarette smoking-induced (CS-induced) emphysema in mouse lung tissue as well as in lung epithelial cells and organoids with higher dosage of or more prolonged exposure to cigarette smoking extract (CSE). Apoptotic signals were also detected and maximally induced in the early stage of CS-exposed mice and CSE-treated epithelial cells. Inhibition of apoptosis by Z-VAD, a pan-caspase inhibitor, switched the cellular stress to enhanced necroptosis in lung epithelial cells and organoids treated with CSE. Depletion or inhibition of receptor-interacting protein kinase 3 (RIP3) or MLKL attenuated the CSE-induced cell death, suggesting that necroptosis contributes to CSE-induced cell death. Silencing or inhibition of RIP1 had no protective effect, indicating a RIP1-independent RIP3 activation pathway. CSE-induced necroptosis released more damage-associated molecular patterns and evoked greater engulfment but slower clearance by bone marrow-derived macrophages, leading to enhanced expression of proinflammatory cytokines Tnfα and Il6. Finally, our in vivo data verified that inhibition of necroptosis by RIP3 inhibitor GSK'872 protected mice from CS-induced emphysema and suppressed the lung inflammation. In conclusion, we provide evidence that necroptosis contributes to the pathogenesis of COPD. Targeting RIP3 and its downstream pathway may be an effective therapy for COPD.
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Affiliation(s)
- Dongshi Chen
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, and
| | - Alyssa D Gregory
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, and
| | - Xiaoyun Li
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, and
| | - Jianxin Wei
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, and
| | - Christine L Burton
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, and
| | - Gregory Gibson
- Department of Cell Biology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Stephen J Scott
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, and
| | - Claudette M St Croix
- Department of Cell Biology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Yingze Zhang
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, and
| | - Steven D Shapiro
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, and
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Hilty M, Wüthrich TM, Godel A, Adelfio R, Aebi S, Burgener SS, Illgen-Wilcke B, Benarafa C. Chronic cigarette smoke exposure and pneumococcal infection induce oropharyngeal microbiota dysbiosis and contribute to long-lasting lung damage in mice. Microb Genom 2020; 6:mgen000485. [PMID: 33295863 PMCID: PMC8116676 DOI: 10.1099/mgen.0.000485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 11/10/2020] [Indexed: 12/17/2022] Open
Abstract
Environmental factors, such as cigarette smoking or lung infections, may influence chronic obstructive pulmonary disease (COPD) progression by modifying the respiratory tract microbiome. However, whether the disease itself induces or maintains dysbiosis remains undefined. In this longitudinal study, we investigated the oropharyngeal microbiota composition and disease progression of mice (in cages of 5-10 mice per cage) before, during and up to 3 months after chronic cigarette smoke exposure or exposure to room air for 6 months. Cigarette smoke exposure induced pulmonary emphysema measurable at the end of exposure for 6 months, as well as 3 months following smoke exposure cessation. Using both classical culture methods and 16S rRNA sequencing, we observed that cigarette smoke exposure altered the relative composition of the oropharyngeal microbiota and reduced its diversity (P <0.001). More than 60 taxa were substantially reduced after 6 months of smoke exposure (P <0.001) However, oropharyngeal microbiota disordering was reversed 3 months after smoke exposure cessation and no significant difference was observed compared to age-matched control mice. The effects of lung infection with Streptococcus pneumoniae on established smoke-induced emphysema and on the oropharyngeal microbiota were also evaluated. Inoculation with S. pneumoniae induced lung damage and altered the microbiota composition for a longer time compared to control groups infected but not previously exposed to smoke (P=0.01). Our data demonstrate effects of cigarette smoke and pneumococcus infection leading to altered microbiota and emphysema development. The reversal of the disordering of the microbiota composition, but not lung damage, following smoke exposure cessation and after clearance of infection suggest that changes in lung structure are not sufficient to sustain a disordered microbiota in mice. Whether changes in the airway microbiota contribute to inducing emphysema requires further investigation.
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Affiliation(s)
- Markus Hilty
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Tsering M. Wüthrich
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
- Institute of Virology and Immunology, 3147 Mittelhäusern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Freiestrasse 1, 3012 Bern, Switzerland
| | - Aurélie Godel
- Institute of Virology and Immunology, 3147 Mittelhäusern, Switzerland
| | - Roberto Adelfio
- Department of Infectious Diseases and Pathobiology (DIP), Vetsuisse Faculty, University of Bern, 3012 Bern, Switzerland
| | - Susanne Aebi
- Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Sabrina S. Burgener
- Institute of Virology and Immunology, 3147 Mittelhäusern, Switzerland
- Department of Infectious Diseases and Pathobiology (DIP), Vetsuisse Faculty, University of Bern, 3012 Bern, Switzerland
| | | | - Charaf Benarafa
- Institute of Virology and Immunology, 3147 Mittelhäusern, Switzerland
- Department of Infectious Diseases and Pathobiology (DIP), Vetsuisse Faculty, University of Bern, 3012 Bern, Switzerland
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10
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Alipour Fayez E, Moosavi SAJ, Kouranifar S, Delbandi AA, Teimourian S, Khoshmirsafa M, Bolouri MR, Sadeghi Shermeh A, Shekarabi M. The effect of smoking on latent tuberculosis infection susceptibility in high risk individuals in Iran. J Immunoassay Immunochem 2020; 41:885-895. [PMID: 32799615 DOI: 10.1080/15321819.2020.1806075] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Tuberculosis has been declared as a global emergency. Latent tuberculosis infection (LTBI) is a state in which host immunity cannot completely eradicate Mycobacterium tuberculosis. Cigarette smoke increases the risk of respiratory infections, such a TB, as it has adverse effects on respiratory immune function. In this cross-sectional study, which was performed from 2016 to 2017, 31 patients with newly diagnosed lung cancer, 63 Chronic obstructive pulmonary disease (COPD), 46 with problems in respiratory system, and 40 healthy subjects were studied. Demographic data of all subjects were recorded via a questionnaire. IGRAs (Interferon-γ release assays) were used to determine LTBI. We showed that smoking has significant odds ratio for COPD patients (OR: 4.58, 95% CI: 1.93-10.87). Also, the concordance of smoking with COPD (OR: 22, 95% CI: 2.7-179.2), lung cancer (OR: 10, 95% CI: 1.03-97), and other respiratory diseases (OR: 4.54, 95% CI: 1.93-10.87) is a significant risk factor for the presence of LTBI whereas the existence of LTBI in the study groups did not show any significant odds ratio. This study is the first to analyze the relationship between smoking in patients with respiratory diseases and LTBI susceptibility in Iran by IGRAs, which proposes cigarette smoking as a powerful risk factor for LTBI.
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Affiliation(s)
- Elham Alipour Fayez
- Department of Immunology, School of Medicine, Iran University of Medical Sciences , Tehran, Iran
| | | | - Siavash Kouranifar
- Rasoul-e-Akram Hospital, Iran University of Medical Sciences , Tehran, Iran
| | - Ali Akbar Delbandi
- Department of Immunology, School of Medicine, Iran University of Medical Sciences , Tehran, Iran.,Immunology Research Center, Iran University of Medical Sciences , Tehran, Iran
| | - Shahram Teimourian
- Department of Medical Genetics, School of Medicine, Iran University of Medical Sciences , Tehran, Iran
| | - Majid Khoshmirsafa
- Department of Immunology, School of Medicine, Iran University of Medical Sciences , Tehran, Iran
| | - Mohammad Reza Bolouri
- Department of Immunology, School of Medicine, Iran University of Medical Sciences , Tehran, Iran
| | - Atefeh Sadeghi Shermeh
- Department of Immunology, School of Medicine, Iran University of Medical Sciences , Tehran, Iran
| | - Mehdi Shekarabi
- Department of Immunology, School of Medicine, Iran University of Medical Sciences , Tehran, Iran.,Immunology Research Center, Iran University of Medical Sciences , Tehran, Iran
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11
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Gómez AC, Rodríguez-Fernández P, Villar-Hernández R, Gibert I, Muriel-Moreno B, Lacoma A, Prat-Aymerich C, Domínguez J. E-cigarettes: Effects in phagocytosis and cytokines response against Mycobacterium tuberculosis. PLoS One 2020; 15:e0228919. [PMID: 32040536 PMCID: PMC7010305 DOI: 10.1371/journal.pone.0228919] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 01/22/2020] [Indexed: 01/17/2023] Open
Abstract
Cigarette smoking and tuberculosis are a significant cause of death worldwide. Several epidemiological studies have demonstrated cigarette smoking is a risk factor for tuberculosis. Electronic cigarettes have recently appeared as a healthier alternative to conventional smoking, although their impact in tuberculosis is not well understood. The aim of this study was to explore the effect of electronic cigarettes in phagocytosis of Mycobacterium tuberculosis and cytokines production. In vitro infection was carried out by exposing THP-1 macrophages to four electronic vapor extracts and the intracellular burden of M. tuberculosis was determined. The percentage of infection was evaluated by confocal microscopy and the cytokine production by Luminex. A reduction of intracellular M. tuberculosis burden in THP-1 macrophages was found after its exposure to electronic vapor extract; the same trend was observed by confocal microscopy when Mycobacterium bovis BCG-GFP strain was used. Electronic cigarettes stimulate a pro-inflammatory cytokine response. We conclude that electronic cigarettes impair the phagocytic function and the cytokine response to M. tuberculosis.
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Affiliation(s)
- Andromeda-Celeste Gómez
- Servei de Microbiologia, Hospital Universitari Germans Trias i Pujol, Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, CIBER Enfermedades Respiratorias (CIBERES), Badalona, Catalonia, Spain
- Institut de Biotecnologia i de Biomedicina (IBB), Universitat Autònoma de Barcelona (UAB), Bellaterra (Cerdanyola del Vallès), Barcelona, Catalonia, Spain
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona (UAB), Cerdanyola del Vallès, Barcelona, Catalonia, Spain
| | - Pablo Rodríguez-Fernández
- Servei de Microbiologia, Hospital Universitari Germans Trias i Pujol, Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, CIBER Enfermedades Respiratorias (CIBERES), Badalona, Catalonia, Spain
- Institut de Biotecnologia i de Biomedicina (IBB), Universitat Autònoma de Barcelona (UAB), Bellaterra (Cerdanyola del Vallès), Barcelona, Catalonia, Spain
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona (UAB), Cerdanyola del Vallès, Barcelona, Catalonia, Spain
| | - Raquel Villar-Hernández
- Servei de Microbiologia, Hospital Universitari Germans Trias i Pujol, Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, CIBER Enfermedades Respiratorias (CIBERES), Badalona, Catalonia, Spain
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona (UAB), Cerdanyola del Vallès, Barcelona, Catalonia, Spain
| | - Isidre Gibert
- Institut de Biotecnologia i de Biomedicina (IBB), Universitat Autònoma de Barcelona (UAB), Bellaterra (Cerdanyola del Vallès), Barcelona, Catalonia, Spain
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona (UAB), Cerdanyola del Vallès, Barcelona, Catalonia, Spain
| | - Beatriz Muriel-Moreno
- Servei de Microbiologia, Hospital Universitari Germans Trias i Pujol, Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, CIBER Enfermedades Respiratorias (CIBERES), Badalona, Catalonia, Spain
| | - Alicia Lacoma
- Servei de Microbiologia, Hospital Universitari Germans Trias i Pujol, Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, CIBER Enfermedades Respiratorias (CIBERES), Badalona, Catalonia, Spain
| | - Cristina Prat-Aymerich
- Servei de Microbiologia, Hospital Universitari Germans Trias i Pujol, Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, CIBER Enfermedades Respiratorias (CIBERES), Badalona, Catalonia, Spain
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona (UAB), Cerdanyola del Vallès, Barcelona, Catalonia, Spain
| | - Jose Domínguez
- Servei de Microbiologia, Hospital Universitari Germans Trias i Pujol, Institut d’Investigació en Ciències de la Salut Germans Trias i Pujol, CIBER Enfermedades Respiratorias (CIBERES), Badalona, Catalonia, Spain
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona (UAB), Cerdanyola del Vallès, Barcelona, Catalonia, Spain
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12
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Lung Macrophage Functional Properties in Chronic Obstructive Pulmonary Disease. Int J Mol Sci 2020; 21:ijms21030853. [PMID: 32013028 PMCID: PMC7037150 DOI: 10.3390/ijms21030853] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/21/2020] [Accepted: 01/23/2020] [Indexed: 12/13/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is caused by the chronic exposure of the lungs to toxic particles and gases. These exposures initiate a persistent innate and adaptive immune inflammatory response in the airways and lung tissues. Lung macrophages (LMs) are key innate immune effector cells that identify, engulf, and destroy pathogens and process inhaled particles, including cigarette smoke and particulate matter (PM), the main environmental triggers for COPD. The number of LMs in lung tissues and airspaces is increased in COPD, suggesting a potential key role for LMs in initiating and perpetuating the chronic inflammatory response that underpins the progressive nature of COPD. The purpose of this brief review is to discuss the origins of LMs, their functional properties (chemotaxis, recruitment, mediator production, phagocytosis and apoptosis) and changes in these properties due to exposure to cigarette smoke, ambient particulate and pathogens, as well as their persistent altered functional properties in subjects with established COPD. We also explore the potential to therapeutically modulate and restore LMs functional properties, to improve impaired immune system, prevent the progression of lung tissue destruction, and improve both morbidity and mortality related to COPD.
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13
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Arienti S, Barth ND, Dorward DA, Rossi AG, Dransfield I. Regulation of Apoptotic Cell Clearance During Resolution of Inflammation. Front Pharmacol 2019; 10:891. [PMID: 31456686 PMCID: PMC6701246 DOI: 10.3389/fphar.2019.00891] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 07/15/2019] [Indexed: 01/17/2023] Open
Abstract
Programmed cell death (apoptosis) has an important role in the maintenance of tissue homeostasis as well as the progression and ultimate resolution of inflammation. During apoptosis, the cell undergoes morphological and biochemical changes [e.g., phosphatidylserine (PtdSer) exposure, caspase activation, changes in mitochondrial membrane potential and DNA cleavage] that act to shut down cellular function and mark the cell for phagocytic clearance. Tissue phagocytes bind and internalize apoptotic cells, bodies, and vesicles, providing a mechanism for the safe disposal of apoptotic material. Phagocytic removal of apoptotic cells before they undergo secondary necrosis reduces the potential for bystander damage to adjacent tissue and importantly initiates signaling pathways within the phagocytic cell that act to dampen inflammation. In a pathological context, excessive apoptosis or failure to clear apoptotic material results in secondary necrosis with the release of pro-inflammatory intracellular contents. In this review, we consider some of the mechanisms by which phagocytosis of apoptotic cells can be controlled. We suggest that matching apoptotic cell load with the capacity for apoptotic cell clearance within tissues may be important for therapeutic strategies that target the apoptotic process for treatment of inflammatory disease.
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Affiliation(s)
- Simone Arienti
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Nicole D Barth
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - David A Dorward
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Adriano G Rossi
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Ian Dransfield
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
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14
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Bai X, Aerts SL, Verma D, Ordway DJ, Chan ED. Epidemiologic Evidence of and Potential Mechanisms by Which Second-Hand Smoke Causes Predisposition to Latent and Active Tuberculosis. Immune Netw 2018; 18:e22. [PMID: 29984040 PMCID: PMC6026693 DOI: 10.4110/in.2018.18.e22] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/15/2018] [Accepted: 06/16/2018] [Indexed: 12/13/2022] Open
Abstract
Many studies have linked cigarette smoke (CS) exposure and tuberculosis (TB) infection and disease although much fewer have studied second-hand smoke (SHS) exposure. Our goal is to review the epidemiologic link between SHS and TB as well as to summarize the effects SHS and direct CS on various immune cells relevant for TB. PubMed searches were performed using the key words "tuberculosis" with "cigarette," "tobacco," or "second-hand smoke." The bibliography of relevant papers were examined for additional relevant publications. Relatively few studies associate SHS exposure with TB infection and active disease. Both SHS and direct CS can alter various components of host immunity resulting in increased vulnerability to TB. While the epidemiologic link of these 2 health maladies is robust, more definitive, mechanistic studies are required to prove that SHS and direct CS actually cause increased susceptibility to TB.
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Affiliation(s)
- Xiyuan Bai
- Department of Medicine, Denver Veterans Affairs Medical Center, University of Colorado Anschutz Medical Center, Denver, CO 80045, USA
- Department of Medicine and Office of Academic Affairs, National Jewish Health, Denver, CO 80206, USA
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Denver, CO 80045, USA
| | - Shanae L. Aerts
- Department of Medicine and Office of Academic Affairs, National Jewish Health, Denver, CO 80206, USA
| | - Deepshikha Verma
- Department of Microbiology, Immunology, and Pathology, Mycobacteria Research Laboratories, Colorado State University, Fort Collins, CO 80523, USA
| | - Diane J. Ordway
- Department of Microbiology, Immunology, and Pathology, Mycobacteria Research Laboratories, Colorado State University, Fort Collins, CO 80523, USA
| | - Edward D. Chan
- Department of Medicine, Denver Veterans Affairs Medical Center, University of Colorado Anschutz Medical Center, Denver, CO 80045, USA
- Department of Medicine and Office of Academic Affairs, National Jewish Health, Denver, CO 80206, USA
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Denver, CO 80045, USA
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15
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White PC, Hirschfeld J, Milward MR, Cooper PR, Wright HJ, Matthews JB, Chapple IL. Cigarette smoke modifies neutrophil chemotaxis, neutrophil extracellular trap formation and inflammatory response-related gene expression. J Periodontal Res 2018; 53:525-535. [DOI: 10.1111/jre.12542] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/03/2018] [Indexed: 01/18/2023]
Affiliation(s)
- P. C. White
- School of Dentistry and Dental Hospital; University of Birmingham; Birmingham Community Healthcare NHS Foundation Trust; Birmingham UK
| | - J. Hirschfeld
- School of Dentistry and Dental Hospital; University of Birmingham; Birmingham Community Healthcare NHS Foundation Trust; Birmingham UK
| | - M. R. Milward
- School of Dentistry and Dental Hospital; University of Birmingham; Birmingham Community Healthcare NHS Foundation Trust; Birmingham UK
| | - P. R. Cooper
- School of Dentistry and Dental Hospital; University of Birmingham; Birmingham Community Healthcare NHS Foundation Trust; Birmingham UK
| | - H. J. Wright
- School of Dentistry and Dental Hospital; University of Birmingham; Birmingham Community Healthcare NHS Foundation Trust; Birmingham UK
| | - J. B. Matthews
- School of Dentistry and Dental Hospital; University of Birmingham; Birmingham Community Healthcare NHS Foundation Trust; Birmingham UK
| | - I. L.C. Chapple
- School of Dentistry and Dental Hospital; University of Birmingham; Birmingham Community Healthcare NHS Foundation Trust; Birmingham UK
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16
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Dysregulated Functions of Lung Macrophage Populations in COPD. J Immunol Res 2018; 2018:2349045. [PMID: 29670919 PMCID: PMC5835245 DOI: 10.1155/2018/2349045] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 11/29/2017] [Indexed: 01/02/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a diverse respiratory disease characterised by bronchiolitis, small airway obstruction, and emphysema. Innate immune cells play a pivotal role in the disease's progression, and in particular, lung macrophages exploit their prevalence and strategic localisation to orchestrate immune responses. To date, alveolar and interstitial resident macrophages as well as blood monocytes have been described in the lungs of patients with COPD contributing to disease pathology by changes in their functional repertoire. In this review, we summarise recent evidence from human studies and work with animal models of COPD with regard to altered functions of each of these myeloid cell populations. We primarily focus on the dysregulated capacity of alveolar macrophages to secrete proinflammatory mediators and proteases, induce oxidative stress, engulf microbes and apoptotic cells, and express surface and intracellular markers in patients with COPD. In addition, we discuss the differences in the responses between alveolar macrophages and interstitial macrophages/monocytes in the disease and propose how the field should advance to better understand the implications of lung macrophage functions in COPD.
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17
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Schneider DJ, Speth JM, Penke LR, Wettlaufer SH, Swanson JA, Peters-Golden M. Mechanisms and modulation of microvesicle uptake in a model of alveolar cell communication. J Biol Chem 2017; 292:20897-20910. [PMID: 29101235 PMCID: PMC5743066 DOI: 10.1074/jbc.m117.792416] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 10/27/2017] [Indexed: 12/31/2022] Open
Abstract
Extracellular vesicles, including exosomes and shed microvesicles (MVs), can be internalized by recipient cells to modulate function. Although the mechanism by which extracellular vesicles are internalized is incompletely characterized, it is generally considered to involve endocytosis and an initial surface-binding event. Furthermore, modulation of uptake by microenvironmental factors is largely unstudied. Here, we used flow cytometry, confocal microscopy, and pharmacologic and molecular targeting to address these gaps in knowledge in a model of pulmonary alveolar cell-cell communication. Alveolar macrophage-derived MVs were fully internalized by alveolar epithelial cells in a time-, dose-, and temperature-dependent manner. Uptake was dependent on dynamin and actin polymerization. However, it was neither saturable nor dependent on clathrin or receptor binding. Internalization was enhanced by extracellular proteins but was inhibited by cigarette smoke extract via oxidative disruption of actin polymerization. We conclude that MV internalization occurs via a pathway more consistent with fluid-phase than receptor-dependent endocytosis and is subject to bidirectional modulation by relevant pathologic perturbations.
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Affiliation(s)
| | | | - Loka R Penke
- From the Division of Pulmonary and Critical Care Medicine
| | | | - Joel A Swanson
- Department of Microbiology and Immunology, and
- Graduate Program in Immunology, University of Michigan Medical School, Ann Arbor, Michigan 48109
| | - Marc Peters-Golden
- From the Division of Pulmonary and Critical Care Medicine,
- Graduate Program in Immunology, University of Michigan Medical School, Ann Arbor, Michigan 48109
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18
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Increased expression of Siglec-9 in chronic obstructive pulmonary disease. Sci Rep 2017; 7:10116. [PMID: 28860481 PMCID: PMC5579055 DOI: 10.1038/s41598-017-09120-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 07/14/2017] [Indexed: 12/12/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a common inflammatory lung disease. Sialic acid-binding immunoglobulin-type lectins 9 (Siglec-9) is predominantly expressed on innate immune cells and has been shown to exert regulatory effect on immune cells through glycan recognition. Soluble Siglec-9 (sSiglec-9), the extracellular region of Siglec-9, might fulfill its function partly by competitive inhibiting siglec-9 binding to its ligands; however, the role of Siglec-9 and sSiglec-9 in the pathogenesis COPD remain largely unknown. In this study, we showed that Siglec-9 expression in alveolar and peripheral blood neutrophil were increased in COPD patients by immunofluorescence and flow cytometry, respectively. Plasma levels of sSiglelc-9 were elevated in COPD patients by ELISA. In vitro, Siglec-9 expression and/or sSiglelc-9 levels were up-regulated by cigarette smoke extract (CSE), lipopolysaccharide (LPS), some cytokines, and dexamethasone (DEX). Recombinant sSiglce-9 increased oxidative burst in neutrophil and enhanced neutrophil chemotaxis toward IL-8 independent on CXCR1 and CXCR2 expression, but it did not affect neutrophil apoptosis or secretions of inflammatory cytokines. In conclusion, Siglec-9 was complementarily increased to induce a negative feedback loop to limit neutrophil activation in COPD, sSiglce-9 enhanced neutrophil ROS and chemotaxis toward IL-8 likely via competitively inhibiting ligands binding to Siglec-9.
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19
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Fond AM, Ravichandran KS. Clearance of Dying Cells by Phagocytes: Mechanisms and Implications for Disease Pathogenesis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 930:25-49. [PMID: 27558816 PMCID: PMC6721615 DOI: 10.1007/978-3-319-39406-0_2] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The efficient clearance of apoptotic cells is an evolutionarily conserved process crucial for homeostasis in multicellular organisms. The clearance involves a series of steps that ultimately facilitates the recognition of the apoptotic cell by the phagocytes and the subsequent uptake and processing of the corpse. These steps include the phagocyte sensing of "find-me" signals released by the apoptotic cell, recognizing "eat-me" signals displayed on the apoptotic cell surface, and then intracellular signaling within the phagocyte to mediate phagocytic cup formation around the corpse and corpse internalization, and the processing of the ingested contents. The engulfment of apoptotic cells by phagocytes not only eliminates debris from tissues but also produces an anti-inflammatory response that suppresses local tissue inflammation. Conversely, impaired corpse clearance can result in loss of immune tolerance and the development of various inflammation-associated disorders such as autoimmunity, atherosclerosis, and airway inflammation but can also affect cancer progression. Recent studies suggest that the clearance process can also influence antitumor immune responses. In this review, we will discuss how apoptotic cells interact with their engulfing phagocytes to generate important immune responses, and how modulation of such responses can influence pathology.
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Affiliation(s)
- Aaron M Fond
- Center for Cell Clearance, and the Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA, 22908, USA
| | - Kodi S Ravichandran
- Center for Cell Clearance, and the Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA, 22908, USA.
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20
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Wootton DG, Dickinson L, Pertinez H, Court J, Eneje O, Keogan L, Macfarlane L, Wilks S, Gallagher J, Woodhead M, Gordon SB, Diggle PJ. A longitudinal modelling study estimates acute symptoms of community acquired pneumonia recover to baseline by 10 days. Eur Respir J 2017; 49:49/6/1602170. [PMID: 28619956 PMCID: PMC5898948 DOI: 10.1183/13993003.02170-2016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 02/22/2017] [Indexed: 12/14/2022]
Abstract
Our aims were to address three fundamental questions relating to the symptoms of community-acquired pneumonia (CAP): Do patients completely recover from pneumonia symptoms? How long does this recovery take? Which factors influence symptomatic recovery? We prospectively recruited patients at two hospitals in Liverpool, UK, into a longitudinal, observational cohort study and modelled symptom recovery from CAP. We excluded patients with cancer, immunosuppression or advanced dementia, and those who were intubated or palliated from admission. We derived a statistical model to describe symptom patterns. We recruited 169 (52% male) adults. Multivariable analysis demonstrated that the time taken to recover to baseline was determined by the initial severity of symptoms. Severity of symptoms was associated with comorbidity and was inversely related to age. The pattern of symptom recovery was exponential and most patients’ symptoms returned to baseline by 10 days. These results will inform the advice given to patients regarding the resolution of their symptoms. The recovery model described here will facilitate the use of symptom recovery as an outcome measure in future clinical trials. Severity of CAP symptoms is inversely related to age and resolution to baseline symptoms takes on average 10 dayshttp://ow.ly/dV0h30befE3
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Affiliation(s)
- Daniel G Wootton
- Institute of Infection and Global Health, University of Liverpool, Liverpool, UK .,Dept of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, UK
| | - Laura Dickinson
- Dept of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Henry Pertinez
- Dept of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Joanne Court
- Dept of Respiratory Research, Aintree University Hospital NHS Foundation Trust, Liverpool, UK
| | - Odiri Eneje
- Dept of Respiratory Research, Aintree University Hospital NHS Foundation Trust, Liverpool, UK
| | - Lynne Keogan
- Dept of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, UK
| | - Laura Macfarlane
- Dept of Respiratory Research, Aintree University Hospital NHS Foundation Trust, Liverpool, UK
| | - Sarah Wilks
- Dept of Respiratory Research, Aintree University Hospital NHS Foundation Trust, Liverpool, UK
| | | | - Mark Woodhead
- Dept of Respiratory Medicine, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK.,Manchester Academic Health Science Centre and Faculty of Medical and Human Sciences, University of Manchester, Manchester, UK
| | - Stephen B Gordon
- Dept of Respiratory Research, Aintree University Hospital NHS Foundation Trust, Liverpool, UK.,The Malawi Liverpool Wellcome Trust Clinical Research Programme, Blantyre, Malawi
| | - Peter J Diggle
- CHICAS, Lancaster University Medical School, Lancaster University, Lancaster, UK
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21
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Wang Y, Luo G, Chen J, Jiang R, Zhu J, Hu N, Huang W, Cheng G, Jia M, Su B, Zhang N, Cui T. Cigarette smoke attenuates phagocytic ability of macrophages through down-regulating Milk fat globule-EGF factor 8 (MFG-E8) expressions. Sci Rep 2017; 7:42642. [PMID: 28195210 PMCID: PMC5307389 DOI: 10.1038/srep42642] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 01/10/2017] [Indexed: 12/20/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is one of the most common inflammatory diseases resulting from habitual smoking. Impaired clearance of apoptotic cell by airway macrophages contributes to lung inflammation. Milk fat globule-EGF factor 8 (MFG-E8), as a link between apoptotic cells and phagocytes, facilitates clearance of apoptotic cells and attenuates inflammation. We sought to investigate altered expression and potential role of MFG-E8 in COPD. In this study, apoptosis was increased and the level of MFG-E8 was decreased while HMGB1 expression was increased in lung tissues of CS-exposed mice. Compared with CS-exposed WT mice, more apoptotic cells were accumulated in lung tissues of CS-exposed MFG-E8 deficiency mice. Exposure of a range of macrophages to cigarette smoke extract (CSE) resulted in decreased MFG-E8 expression. Administration of rmMFG-E8 ameliorated phagocytic ability of RAW264.7 cells and suppressed inflammatory response induced by CS-exposure. 10% CSE stimulation suppressed Rac1 membrane localization in RAW264.7 cells which was restored by administration of rmMFG-E8. MFG-E8 deficiency diminished uptake of apoptotic thymocytes by peritoneal macrophages upon CSE exposure. Overall, the findings in current work provide a novel target for diagnosing and treating COPD.
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Affiliation(s)
- Yueqin Wang
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Guangwei Luo
- Department of Respiratory Medicine, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Jie Chen
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Rui Jiang
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Jianhua Zhu
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Na Hu
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Wei Huang
- Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Guilian Cheng
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Min Jia
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Bingtao Su
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Nian Zhang
- Department of Respiratory Medicine, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Tianpen Cui
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
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22
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Catrina AI, Joshua V, Klareskog L, Malmström V. Mechanisms involved in triggering rheumatoid arthritis. Immunol Rev 2016; 269:162-74. [PMID: 26683152 DOI: 10.1111/imr.12379] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory syndrome with a strong autoimmune component. The autoantigens in RA are neither tissue nor organ-specific, but comprise a broad collection of post-translational modified proteins, such as citrullinated proteins. These modifications are likely to be triggered by innate stimuli. In genetically susceptible hosts, they can lead to a more substantiated secondary autoimmune reaction targeting the joints and precipitating the clinical onset of RA. Both innate and adaptive mechanisms will then closely interplay to promote chronic joint inflammation in the several absence of appropriate treatment. This scenario, is shared with other autoimmune diseases where potentially pathogenic immune responses are present already before disease onset. Better understanding of these processes will allow both earlier diagnosis of RA and identification of those healthy individuals that are at risk of developing disease, opening possibilities for disease prevention. In this review, we discuss the iterative processes of innate and adaptive immunity responsible for the (longitudinal) development of immune reactions that may contribute to the development of RA.
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Affiliation(s)
- Anca I Catrina
- Rheumatology Unit, Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden
| | - Vijay Joshua
- Rheumatology Unit, Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden
| | - Lars Klareskog
- Rheumatology Unit, Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden
| | - Vivianne Malmström
- Rheumatology Unit, Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden
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23
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Zhang S, Xie JG, Su BT, Li JL, Hu N, Chen J, Luo GW, Cui TP. MFG-E8, a clearance glycoprotein of apoptotic cells, as a new marker of disease severity in chronic obstructive pulmonary disease. ACTA ACUST UNITED AC 2015; 48:1032-8. [PMID: 26375445 PMCID: PMC4671530 DOI: 10.1590/1414-431x20154730] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 05/21/2015] [Indexed: 11/21/2022]
Abstract
Milk fat globule epidermal growth factor 8 (MFG-E8) is an opsonin involved in the
phagocytosis of apoptotic cells. In patients with chronic obstructive pulmonary
disease (COPD), apoptotic cell clearance is defective. However, whether aberrant
MFG-E8 expression is involved in this defect is unknown. In this study, we examined
the expression of MFG-E8 in COPD patients. MFG-E8, interleukin (IL)-1β and
transforming growth factor (TGF)-β levels were measured in the plasma of 96 COPD
patients (93 males, 3 females; age range: 62.12±10.39) and 87 age-matched healthy
controls (85 males, 2 females; age range: 64.81±10.11 years) using an enzyme-linked
immunosorbent assay. Compared with controls, COPD patients had a significantly lower
plasma MFG-E8 levels (P<0.01) and significantly higher plasma TGF-β levels
(P=0.002), whereas there was no difference in plasma IL-1β levels between the two
groups. Moreover, plasma MFG-E8 levels decreased progressively between Global
Initiative for Chronic Obstructive Lung Disease (GOLD) I and GOLD IV stage COPD.
Multiple regression analysis showed that the forced expiratory volume in 1 s
(FEV1 % predicted) and smoking habit were powerful predictors of MFG-E8
in COPD (P<0.01 and P=0.026, respectively). MFG-E8 was positively associated with
the FEV1 % predicted and negatively associated with smoking habit. The
area under the receiver operating characteristic curve was 0.874 (95% confidence
interval: 0.798-0.95; P<0.01). Our findings demonstrated the utility of MFG-E8 as
a marker of disease severity in COPD and that cigarette smoke impaired MFG-E8
expression in these patients.
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Affiliation(s)
- S Zhang
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - J G Xie
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - B T Su
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - J L Li
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - N Hu
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - J Chen
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - G W Luo
- Department of Respiratory and Critical Care Medicine, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - T P Cui
- Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Imamura K, Kokubu E, Kita D, Ota K, Ishihara K, Saito A. Cigarette smoke condensate modulates migration of human gingival epithelial cells and their interactions with Porphyromonas gingivalis. J Periodontal Res 2015; 50:411-21. [PMID: 25196284 DOI: 10.1111/jre.12222] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/07/2014] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND OBJECTIVE Epithelial cells are recognized as the first line of defense against bacterial infection and environmental harmful stimuli such as cigarette smoke (CS). Although previous studies explored the effects of nicotine on host cells, mechanisms by which CS affects cellular functions remain uncertain. The present study investigated the effects of CS condensate (CSC) on in vitro wound closure of gingival epithelial cells and their potential interactions with a major periodontal pathogen, Porphyromonas gingivalis. MATERIAL AND METHODS Human gingival epithelial cells (Ca9-22) were treated with CSC for 24 h. Cell proliferation was determined using a WST-1 assay. Cell migration was assessed using a wound closure model. The expression of integrins was analyzed by confocal scanning laser microscopy and real-time PCR. Intracellular invasion of P. gingivalis was evaluated by confocal scanning laser microscopy and an antibiotic protection assay. RESULTS Low concentrations (1-10 μg/mL) of CSC showed no significant effect on cell proliferation. CSC demonstrated dual effects on epithelial wound closure of Ca9-22 cells: high concentrations (i.e. 250 μg/mL) significantly inhibited the wound closure whereas low concentrations (i.e. 10 μg/mL) promoted it (p < 0.01). CSC induced distinct changes in cytoskeleton. When CSC-exposed cells were infected with P. gingivalis for 2 h, a significant inhibition of wound closure was observed concurrent with a decrease in integrin α3 expression near the wound area. A significantly increased P. gingivalis invasion into Ca9-22 was observed when exposed to low concentrations of CSC. CONCLUSION Low concentrations of CSC increased invasion of human gingival epithelial cells by P. gingivalis and induced changes in cytoskeleton and integrin expression, thereby modulating the cell migration.
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Affiliation(s)
- K Imamura
- Department of Periodontology, Tokyo Dental College, Tokyo, Japan
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25
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Heijink IH, Pouwels SD, Leijendekker C, de Bruin HG, Zijlstra GJ, van der Vaart H, ten Hacken NHT, van Oosterhout AJM, Nawijn MC, van der Toorn M. Cigarette Smoke–Induced Damage-Associated Molecular Pattern Release from Necrotic Neutrophils Triggers Proinflammatory Mediator Release. Am J Respir Cell Mol Biol 2015; 52:554-62. [DOI: 10.1165/rcmb.2013-0505oc] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Ni I, Ji C, Vij N. Second-hand cigarette smoke impairs bacterial phagocytosis in macrophages by modulating CFTR dependent lipid-rafts. PLoS One 2015; 10:e0121200. [PMID: 25794013 PMCID: PMC4368805 DOI: 10.1371/journal.pone.0121200] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Accepted: 01/27/2015] [Indexed: 01/08/2023] Open
Abstract
Introduction First/Second-hand cigarette-smoke (FHS/SHS) exposure weakens immune defenses inducing chronic obstructive pulmonary disease (COPD) but the underlying mechanisms are not fully understood. Hence, we evaluated if SHS induced changes in membrane/lipid-raft (m-/r)-CFTR (cystic fibrosis transmembrane conductance regulator) expression/activity is a potential mechanism for impaired bacterial phagocytosis in COPD. Methods RAW264.7 murine macrophages were exposed to freshly prepared CS-extract (CSE) containing culture media and/or Pseudomonas-aeruginosa-PA01-GFP for phagocytosis (fluorescence-microscopy), bacterial survival (colony-forming-units-CFU), and immunoblotting assays. The CFTR-expression/activity and lipid-rafts were modulated by transient-transfection or inhibitors/inducers. Next, mice were exposed to acute/sub-chronic-SHS or room-air (5-days/3-weeks) and infected with PA01-GFP, followed by quantification of bacterial survival by CFU-assay. Results We investigated the effect of CSE treatment on RAW264.7 cells infected by PA01-GFP and observed that CSE treatment significantly (p<0.01) inhibits PA01-GFP phagocytosis as compared to the controls. We also verified this in murine model, exposed to acute/sub-chronic-SHS and found significant (p<0.05, p<0.02) increase in bacterial survival in the SHS-exposed lungs as compared to the room-air controls. Next, we examined the effect of impaired CFTR ion-channel-activity on PA01-GFP infection of RAW264.7 cells using CFTR172-inhibitor and found no significant change in phagocytosis. We also similarly evaluated the effect of a CFTR corrector-potentiator compound, VRT-532, and observed no significant rescue of CSE impaired PA01-GFP phagocytosis although it significantly (p<0.05) decreases CSE induced bacterial survival. Moreover, induction of CFTR expression in macrophages significantly (p<0.03) improves CSE impaired PA01-GFP phagocytosis as compared to the control. Next, we verified the link between m-/r-CFTR expression and phagocytosis using methyl-β-cyclodextran (CD), as it is known to deplete CFTR from membrane lipid-rafts. We observed that CD treatment significantly (p<0.01) inhibits bacterial phagocytosis in RAW264.7 cells and adding CSE further impairs phagocytosis suggesting synergistic effect on CFTR dependent lipid-rafts. Conclusion Our data suggest that SHS impairs bacterial phagocytosis by modulating CFTR dependent lipid-rafts.
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Affiliation(s)
- Inzer Ni
- Department of Pediatric Respiratory Science, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Biomedical Engineering, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Changhoon Ji
- Department of Pediatric Respiratory Science, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Biomedical Engineering, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Neeraj Vij
- Department of Pediatric Respiratory Science, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Foundational Sciences, College of Medicine, Central Michigan University, Mount Pleasant, Michigan, United States of America
- * E-mail:
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Chan ED, Kinney WH, Honda JR, Bishwakarma R, Gangavelli A, Mya J, Bai X, Ordway DJ. Tobacco exposure and susceptibility to tuberculosis: is there a smoking gun? Tuberculosis (Edinb) 2014; 94:544-50. [PMID: 25305002 DOI: 10.1016/j.tube.2014.08.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Revised: 08/14/2014] [Accepted: 08/19/2014] [Indexed: 12/22/2022]
Abstract
In many regions of the world, there is a great overlap between the prevalence of cigarette smoke exposure and tuberculosis. Despite the large body of epidemiologic evidence that tobacco smoke exposure is associated with increased tuberculosis infection, active disease, severity of disease, and mortality from tuberculosis, these studies cannot distinguish whether the mechanism is principally through direct impairment of anti-tuberculosis immunity by cigarette smoke or due to potential confounders that increase risk for tuberculosis and are commonly associated with smoking--such as poverty, malnutrition, and crowded living conditions. While there are several in vivo murine and in vitro macrophage studies showing cigarette smoke impairs control of tuberculous infection, little is known of the molecular and cellular mechanisms by which this impairment occurs. Herein, we highlight the key findings of these studies. Additionally, we review key immune cells that play critical roles in host-defense or pathogenesis of tuberculosis and generate a hypothesis-driven discussion of the possible mechanisms by which cigarette smoke impairs or enhances their functions, respectively, ultimately resulting in compromised immunity against tuberculosis.
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Affiliation(s)
- Edward D Chan
- Department of Medicine, Denver Veterans Affairs Medical Center, 1055 Clermont St, Denver, CO 80220, USA; Departments of Medicine and Academic Affairs, D509, Neustadt Building, National Jewish Health, 1400 Jackson St, Denver, CO 80206, USA; Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Research 2, Box C-272, 9th Floor, 12700 East 19th Avenue, Aurora, CO 80045, USA.
| | - William H Kinney
- Departments of Medicine and Academic Affairs, D509, Neustadt Building, National Jewish Health, 1400 Jackson St, Denver, CO 80206, USA
| | - Jennifer R Honda
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Research 2, Box C-272, 9th Floor, 12700 East 19th Avenue, Aurora, CO 80045, USA
| | - Raju Bishwakarma
- Departments of Medicine and Academic Affairs, D509, Neustadt Building, National Jewish Health, 1400 Jackson St, Denver, CO 80206, USA
| | - Avani Gangavelli
- Departments of Medicine and Academic Affairs, D509, Neustadt Building, National Jewish Health, 1400 Jackson St, Denver, CO 80206, USA
| | - Jenny Mya
- Departments of Medicine and Academic Affairs, D509, Neustadt Building, National Jewish Health, 1400 Jackson St, Denver, CO 80206, USA
| | - Xiyuan Bai
- Departments of Medicine and Academic Affairs, D509, Neustadt Building, National Jewish Health, 1400 Jackson St, Denver, CO 80206, USA
| | - Diane J Ordway
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, 1682 Campus Delivery, Fort Collins, CO 80523, USA
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Vlahos R, Bozinovski S. Role of alveolar macrophages in chronic obstructive pulmonary disease. Front Immunol 2014; 5:435. [PMID: 25309536 PMCID: PMC4160089 DOI: 10.3389/fimmu.2014.00435] [Citation(s) in RCA: 158] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 08/26/2014] [Indexed: 11/13/2022] Open
Abstract
Alveolar macrophages (AMs) represent a unique leukocyte population that responds to airborne irritants and microbes. This distinct microenvironment coordinates the maturation of long-lived AMs, which originate from fetal blood monocytes and self-renew through mechanisms dependent on GM-CSF and CSF-1 signaling. Peripheral blood monocytes can also replenish lung macrophages; however, this appears to occur in a stimuli specific manner. In addition to mounting an appropriate immune response during infection and injury, AMs actively coordinate the resolution of inflammation through efferocytosis of apoptotic cells. Any perturbation of this process can lead to deleterious responses. In chronic obstructive pulmonary disease (COPD), there is an accumulation of airway macrophages that do not conform to the classic M1/M2 dichotomy. There is also a skewed transcriptome profile that favors expression of wound-healing M2 markers, which is reflective of a deficiency to resolve inflammation. Endogenous mediators that can promote an imbalance in inhibitory M1 vs. healing M2 macrophages are discussed, as they are the plausible mechanisms underlying why AMs fail to effectively resolve inflammation and restore normal lung homeostasis in COPD.
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Affiliation(s)
- Ross Vlahos
- Department of Pharmacology and Therapeutics, Lung Health Research Centre, The University of Melbourne , Parkville, VIC , Australia
| | - Steven Bozinovski
- Department of Pharmacology and Therapeutics, Lung Health Research Centre, The University of Melbourne , Parkville, VIC , Australia
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Vogelgesang A, Scapin C, Barone C, Tam E, Blumental Perry A, Dammann CEL. Cigarette smoke exposure during pregnancy alters fetomaternal cell trafficking leading to retention of microchimeric cells in the maternal lung. PLoS One 2014; 9:e88285. [PMID: 24832066 PMCID: PMC4022454 DOI: 10.1371/journal.pone.0088285] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 01/07/2014] [Indexed: 01/09/2023] Open
Abstract
Cigarette smoke exposure causes chronic oxidative lung damage. During pregnancy, fetal microchimeric cells traffic to the mother. Their numbers are increased at the site of acute injury. We hypothesized that milder chronic diffuse smoke injury would attract fetal cells to maternal lungs. We used a green-fluorescent-protein (GFP) mouse model to study the effects of cigarette smoke exposure on fetomaternal cell trafficking. Wild-type female mice were exposed to cigarette smoke for about 4 weeks and bred with homozygote GFP males. Cigarette smoke exposure continued until lungs were harvested and analyzed. Exposure to cigarette smoke led to macrophage accumulation in the maternal lung and significantly lower fetal weights. Cigarette smoke exposure influenced fetomaternal cell trafficking. It was associated with retention of GFP-positive fetal cells in the maternal lung and a significant reduction of fetal cells in maternal livers at gestational day 18, when fetomaternal cell trafficking peaks in the mouse model. Cells quickly clear postpartum, leaving only a few, difficult to detect, persisting microchimeric cells behind. In our study, we confirmed the postpartum clearance of cells in the maternal lungs, with no significant difference in both groups. We conclude that in the mouse model, cigarette smoke exposure during pregnancy leads to a retention of fetal microchimeric cells in the maternal lung, the site of injury. Further studies will be needed to elucidate the effect of cigarette smoke exposure on the phenotypic characteristics and function of these fetal microchimeric cells, and confirm its course in cigarette smoke exposure in humans.
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Affiliation(s)
- Anja Vogelgesang
- Division of Newborn Medicine, Department of Pediatrics, Floating Hospital for Children at Tufts Medical Center, Boston, Massachusetts, United States of America
- Hanover Medical School, Hanover, Germany
| | - Cristina Scapin
- Division of Newborn Medicine, Department of Pediatrics, Floating Hospital for Children at Tufts Medical Center, Boston, Massachusetts, United States of America
- Genetic and Cellular Biology Division, Dibit. San Raffaele Scientific Institute, Milan, Italy
| | - Caroline Barone
- Division of Newborn Medicine, Department of Pediatrics, Floating Hospital for Children at Tufts Medical Center, Boston, Massachusetts, United States of America
| | - Elaine Tam
- Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts, United States of America
| | - Anna Blumental Perry
- Department of Surgery, Tufts Medical Center, Boston, Massachusetts, United States of America
- Department of Biomedical Sciences, Mercer School of Medicine and Department of Laboratory Oncology Research, Anderson Cancer Institute, Memorial University Medical Center, Savannah, Georgia, United States of America
| | - Christiane E. L. Dammann
- Division of Newborn Medicine, Department of Pediatrics, Floating Hospital for Children at Tufts Medical Center, Boston, Massachusetts, United States of America
- Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts, United States of America
- * E-mail:
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Jaspers I. Cigarette smoke effects on innate immune mechanisms in the nasal mucosa. Potential effects on the microbiome. Ann Am Thorac Soc 2014; 11 Suppl 1:S38-42. [PMID: 24437404 DOI: 10.1513/annalsats.201306-154mg] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
It is well established that exposure to cigarette smoke (CS), through active smoking and through exposure to secondhand smoke, has immunosuppressive effects, yet how this might affect the microbiome is not known. In this manuscript we focus on the effects of CS on innate host defense response, with particular emphasis on the role of epithelial cells and mucosal immune responses in the nose and the potential effects on the microbiome. The studies described here briefly summarize the effects of CS on specific innate immune cells, such as neutrophils, macrophages/monocytes, natural killer cells, and dendritic cells. A detailed description of how CS affects epithelial cells and why we consider this to be a central defect in the overall immunosuppressive effects of CS in the lung is provided. We summarize data on the role of the "epimmunome" in the context of CS exposure, including the effects on soluble mediator production, such as cytokines, chemokines, and antimicrobial defense mediators. Separate emphasis is put on the expression of ligands on epithelial cells, which directly interact with receptors on immune cells, and the effects of CS on these interactions. We introduce the nose and nasal mucosa as a model to study the effects of CS exposure on host defense responses and changes in the microbiome in humans in vivo. Understanding the dynamics of a healthy microbiome and how CS affects this balance is important to uncovering the mechanisms of CS-induced disease.
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Affiliation(s)
- Ilona Jaspers
- 1 Department of Pediatrics, University of North Carolina, Chapel Hill, North Carolina
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Bozinovski S, Anthony D, Anderson GP, Irving LB, Levy BD, Vlahos R. Treating neutrophilic inflammation in COPD by targeting ALX/FPR2 resolution pathways. Pharmacol Ther 2013; 140:280-9. [PMID: 23880288 DOI: 10.1016/j.pharmthera.2013.07.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Accepted: 07/09/2013] [Indexed: 12/19/2022]
Abstract
Neutrophilic inflammation persists in COPD despite best current therapies and it is particularly resistant to inhaled glucocorticosteroids. Persistent neutrophil activation not only contributes to matrix breakdown, but can maintain inflammation through the release of endogenous damage associated molecule patterns (DAMPs). Inhibiting excessive neutrophilic inflammation is challenging as many pathogen recognition receptors can initiate migration and the targeting of downstream signaling molecules may compromise essential host defense mechanisms. Here, we discuss new strategies to combat this inflammation in COPD by focusing on the anti-inflammatory role of ALX/FPR2 receptors. ALX/FPR2 is a promiscuous G-protein coupled receptor (GPCR) responding to lipid and peptide agonists that can either switch on acute inflammation or promote resolution of inflammation. We highlight this receptor as an emerging target in the pathogenesis of COPD because known ALX/FPR2 endogenous agonists are enriched in COPD. Serum Amyloid A (SAA) has recently been discovered to be abundantly expressed in COPD and is a potent ALX/FPR2 agonist that unlike almost all other inflammatory chemoattractants, is induced by glucocorticosteroids. SAA not only initiates lung inflammation via ALX/FPR2 but can allosterically modify this receptor so that it no longer transduces pro-resolving signals from endogenous lipoxins that would otherwise promote tissue healing. We propose that there is an imbalance in endogenous and microbial ALX/FPR2 receptor agonists in the inflamed COPD lung environment that oppose protective anti-inflammatory and pro-resolution pathways. These insights open the possibility of targeting ALX/FPR2 receptors using synthetic agonists to resolve persistent neutrophilic inflammation without compromising essential host defense mechanisms.
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Affiliation(s)
- Steven Bozinovski
- Department of Pharmacology and Therapeutics, The University of Melbourne, Victoria, Australia.
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Feldman C, Anderson R. Cigarette smoking and mechanisms of susceptibility to infections of the respiratory tract and other organ systems. J Infect 2013; 67:169-84. [PMID: 23707875 DOI: 10.1016/j.jinf.2013.05.004] [Citation(s) in RCA: 119] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 05/08/2013] [Accepted: 05/14/2013] [Indexed: 01/04/2023]
Abstract
The predisposition of cigarette smokers for development of oral and respiratory infections caused by microbial pathogens is well recognised, with those infected with the human immunodeficiency virus (HIV) at particularly high risk. Smoking cigarettes has a suppressive effect on the protective functions of airway epithelium, alveolar macrophages, dendritic cells, natural killer (NK) cells and adaptive immune mechanisms, in the setting of chronic systemic activation of neutrophils. Cigarette smoke also has a direct effect on microbial pathogens to promote the likelihood of infective disease, specifically promotion of microbial virulence and antibiotic resistance. In addition to interactions between smoking and HIV infection, a number of specific infections/clinical syndromes have been associated epidemiologically with cigarette smoking, including those of the upper and lower respiratory tract, gastrointestinal tract, central nervous and other organ systems. Smoking cessation benefits patients in many ways, including reduction of the risk of infectious disease.
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Affiliation(s)
- Charles Feldman
- Division of Pulmonology, Department of Internal Medicine, Charlotte Maxeke Johannesburg Academic Hospital, South Africa.
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Cigarette smoke (CS) and nicotine delay neutrophil spontaneous death via suppressing production of diphosphoinositol pentakisphosphate. Proc Natl Acad Sci U S A 2013; 110:7726-31. [PMID: 23610437 DOI: 10.1073/pnas.1302906110] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Diphosphoinositol pentakisphosphate (InsP7), a higher inositol phosphate containing energetic pyrophosphate bonds, is beginning to emerge as a key cellular signaling molecule. However, the various physiological and pathological processes that involve InsP7 are not completely understood. Here we report that cigarette smoke (CS) extract and nicotine reduce InsP7 levels in aging neutrophils. This subsequently leads to suppression of Akt deactivation, a causal mediator of neutrophil spontaneous death, and delayed neutrophil death. The effect of CS extract and nicotine on neutrophil death can be suppressed by either directly inhibiting the PtdIns(3,4,5)P3/Akt pathway, or increasing InsP7 levels via overexpression of InsP6K1, an inositol hexakisphosphate (InsP6) kinase responsible for InsP7 production in neutrophils. Delayed neutrophil death contributes to the pathogenesis of CS-induced chronic obstructive pulmonary disease. Therefore, disruption of InsP6K1 augments CS-induced neutrophil accumulation and lung damage. Taken together, these results suggest that CS and nicotine delay neutrophil spontaneous death by suppressing InsP7 production and consequently blocking Akt deactivation in aging neutrophils. Modifying neutrophil death via this pathway provides a strategy and therapeutic target for the treatment of tobacco-induced chronic obstructive pulmonary disease.
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A Novel Anti-Inflammatory and Pro-Resolving Role for Resolvin D1 in Acute Cigarette Smoke-Induced Lung Inflammation. PLoS One 2013; 8:e58258. [PMID: 23484005 PMCID: PMC3590122 DOI: 10.1371/journal.pone.0058258] [Citation(s) in RCA: 155] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 02/01/2013] [Indexed: 12/21/2022] Open
Abstract
Introduction Cigarette smoke is a profound pro-inflammatory stimulus that contributes to acute lung injuries and to chronic lung disease including COPD (emphysema and chronic bronchitis). Until recently, it was assumed that resolution of inflammation was a passive process that occurred once the inflammatory stimulus was removed. It is now recognized that resolution of inflammation is a bioactive process, mediated by specialized lipid mediators, and that normal homeostasis is maintained by a balance between pro-inflammatory and pro-resolving pathways. These novel small lipid mediators, including the resolvins, protectins and maresins, are bioactive products mainly derived from dietary omega-3 and omega-6 polyunsaturated fatty acids (PUFA). We hypothesize that resolvin D1 (RvD1) has potent anti-inflammatory and pro-resolving effects in a model of cigarette smoke-induced lung inflammation. Methods Primary human lung fibroblasts, small airway epithelial cells and blood monocytes were treated with IL-1β or cigarette smoke extract in combination with RvD1 in vitro, production of pro-inflammatory mediators was measured. Mice were exposed to dilute mainstream cigarette smoke and treated with RvD1 either concurrently with smoke or after smoking cessation. The effects on lung inflammation and lung macrophage populations were assessed. Results RvD1 suppressed production of pro-inflammatory mediators by primary human cells in a dose-dependent manner. Treatment of mice with RvD1 concurrently with cigarette smoke exposure significantly reduced neutrophilic lung inflammation and production of pro-inflammatory cytokines, while upregulating the anti-inflammatory cytokine IL-10. RvD1 promoted differentiation of alternatively activated (M2) macrophages and neutrophil efferocytosis. RvD1 also accelerated the resolution of lung inflammation when given after the final smoke exposure. Conclusions RvD1 has potent anti-inflammatory and pro-resolving effects in cells and mice exposed to cigarette smoke. Resolvins have strong potential as a novel therapeutic approach to resolve lung injury caused by smoke and pulmonary toxicants.
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Brahmajothi MV, Sun NZ, Auten RL. S-nitrosothiol transport via PEPT2 mediates biological effects of nitric oxide gas exposure in macrophages. Am J Respir Cell Mol Biol 2012; 48:230-9. [PMID: 23239496 DOI: 10.1165/rcmb.2012-0305oc] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The pharmacological effects of nitric oxide (NO) administered as a gas are dependent on the conversion to S-nitrosocysteine, and as such are largely mediated by the L-type amino-acid transporters (LATs) in several cell types. The dipeptide transporter PEPT2 has been proposed as a second route for S-nitrosothiol (SNO) transport, but this has never been demonstrated. Because NO governs important immune functions in alveolar macrophages, we exposed rat alveolar macrophages (primary and NR8383 cells) to NO gas at the air-liquid interface ± LPS stimulation in the presence of PEPT2 substrate Cys-Gly (or the LAT substrate L-Cys) ± transporter competitors. We found that SNO uptake and NO-dependent actions, such as the activation of soluble guanylyl cyclase (sGC), the augmentation of sGC-dependent filamentous actin (F-actin) polymerization, phagocytosis, and the inhibition of NF-κB activation, were significantly augmented by the addition of Cys-Gly in a manner dependent on PEPT2 transport. We found parallel (and greater) effects that were dependent on LAT transport. The contribution of cystine/cysteine shuttling via system x cystine transporter (xCT) to SNO uptake was relatively minor. The observed effects were unaffected by NO synthase inhibition. The NO gas treatment of alveolar macrophages increased SNO uptake, the activation of sGC, F-actin polymerization, and phagocytosis, and inhibited NF-κB activation, in a manner dependent on SNO transport via PEPT2, as well as via LAT.
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Affiliation(s)
- Mulugu V Brahmajothi
- Division of Neonatal Medicine, Department of Pediatrics, Duke University Medical Center, Duke University, Durham, NC 27710, USA
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Takamiya R, Fukunaga K, Arita M, Miyata J, Seki H, Minematsu N, Suematsu M, Asano K. Resolvin E1 maintains macrophage function under cigarette smoke-induced oxidative stress. FEBS Open Bio 2012; 2:328-33. [PMID: 23772366 PMCID: PMC3678121 DOI: 10.1016/j.fob.2012.10.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 09/10/2012] [Accepted: 10/11/2012] [Indexed: 11/15/2022] Open
Abstract
Cigarette smoke (CS) induces oxidative stress, which disables macrophage function. In this study, we examined whether Resolvin E1 (RvE1), a pro-resolving mediator known to enhance macrophage functions, attenuates the damage of macrophages by CS extract (CSE) induced oxidative stress. RvE1 blocked p47phox translocation to plasma membrane induced by CSE in a macrophage cell line, RAW264.7 cells, resulting in suppression of superoxide production. Furthermore, pretreatment of RAW264.7 cells with RvE1 restored the phagocytic activity and reduced cell death induced by treatment of CSE. These results suggest that RvE1 plays important roles in preserving macrophage function under CS-induced oxidative stress.
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Affiliation(s)
- Rina Takamiya
- Department of Biochemistry, School of Medicine, Keio University, Japan ; Division of Pulmonary Medicine, Department of Medicine, School of Medicine, Keio University, Japan ; Systems Glycobiology Research Group, Advanced Science Institute, RIKEN, Japan
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Yoshida S, Minematsu N, Chubachi S, Nakamura H, Miyazaki M, Tsuduki K, Takahashi S, Miyasho T, Iwabuchi T, Takamiya R, Tateno H, Mouded M, Shapiro SD, Asano K, Betsuyaku T. Annexin V decreases PS-mediated macrophage efferocytosis and deteriorates elastase-induced pulmonary emphysema in mice. Am J Physiol Lung Cell Mol Physiol 2012; 303:L852-60. [PMID: 22962014 DOI: 10.1152/ajplung.00066.2012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Efferocytosis is believed to be a key regulator for lung inflammation in chronic obstructive pulmonary disease. In this study we pharmacologically inhibited efferocytosis with annexin V and attempted to determine its impact on the progression of pulmonary emphysema in mouse. We first demonstrated in vitro and in vivo efferocytosis experiments using annexin V, an inhibitor for phosphatidylserine-mediated efferocytosis. We then inhibited efferocytosis in porcine pancreatic elastase (PPE)-treated mice. PPE-treated mice were instilled annexin V intranasally starting from day 8 until day 20. Mean linear intercept (Lm) was measured, and cell apoptosis was assessed in lung specimen obtained on day 21. Cell profile, apoptosis, and mRNA expression of matrix metalloproteinases (MMPs) and growth factors were evaluated in bronchoalveolar lavage (BAL) cells on day 15. Annexin V attenuated macrophage efferocytosis both in vitro and in vivo. PPE-treated mice had a significant higher Lm, and annexin V further increased that by 32%. More number of macrophages was found in BAL fluid in this group. Interestingly, cell apoptosis was not increased by annexin V treatment both in lung specimens and BAL fluid, but macrophages from mice treated with both PPE and annexin V expressed higher MMP-2 mRNA levels and had a trend for higher MMP-12 mRNA expression. mRNA expression of keratinocyte growth factor tended to be downregulated. We showed that inhibited efferocytosis with annexin V worsened elastase-induced pulmonary emphysema in mice, which was, at least partly, attributed to a lack of phenotypic change in macrophages toward anti-inflammatory one.
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Affiliation(s)
- S Yoshida
- Dept. of Pulmonary Medicine, Keio Univ. School of Medicine, Tokyo, Japan
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Allosteric modulation of beta1 integrin function induces lung tissue repair. Adv Pharmacol Sci 2012; 2012:768720. [PMID: 22505883 PMCID: PMC3299389 DOI: 10.1155/2012/768720] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 10/21/2011] [Accepted: 10/31/2011] [Indexed: 12/04/2022] Open
Abstract
The cellular cytoskeleton, adhesion receptors, extracellular matrix composition, and their spatial distribution are together fundamental in a cell's balanced mechanical sensing of its environment. We show that, in lung injury, extracellular matrix-integrin interactions are altered and this leads to signalling alteration and mechanical missensing. The missensing, secondary to matrix alteration and cell surface receptor alterations, leads to increased cellular stiffness, injury, and death. We have identified a monoclonal antibody against β1 integrin which caused matrix remodelling and enhancement of cell survival. The antibody acts as an allosteric dual agonist/antagonist modulator of β1 integrin. Intriguingly, this antibody reversed both functional and structural tissue injury in an animal model of degenerative disease in lung.
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Bozinovski S, Vlahos R, Zhang Y, Lah LC, Seow HJ, Mansell A, Anderson GP. Carbonylation Caused by Cigarette Smoke Extract Is Associated with Defective Macrophage Immunity. Am J Respir Cell Mol Biol 2011; 45:229-36. [DOI: 10.1165/rcmb.2010-0272oc] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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