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Kawagoe J, Maeda Y, Kikuchi R, Takahashi M, Fuchikami JI, Tsuji T, Kono Y, Abe S, Yamaguchi K, Koyama N, Nakamura H, Aoshiba K. Differential effects of dexamethasone and roflumilast on asthma in mice with or without short cigarette smoke exposure. Pulm Pharmacol Ther 2021; 70:102052. [PMID: 34214693 DOI: 10.1016/j.pupt.2021.102052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/03/2021] [Accepted: 06/25/2021] [Indexed: 02/07/2023]
Abstract
Appropriate drug treatment for smoking asthmatics is uncertain because most smokers with asthma are less sensitive to treatment with glucocorticoids compared with non-smokers with asthma. We hypothesized that roflumilast (Rof), a selective phosphodiesterases-4 inhibitor regarded as an add-on therapy for chronic obstructive pulmonary disease, might be more effective than glucocorticoids for improving asthma in smokers. To investigate this hypothesis, we compared the therapeutic effects of dexamethasone (Dex) and Rof in a mouse model of ovalbumin-induced asthma with or without concurrent cigarette smoke (CS) exposure for 2 weeks. We found that recurrent asthma attacks increased lung tissue resistance. CS exposure in asthmatic mice decreased the central airway resistance, increased lung compliance, and attenuated airway hyper-responsiveness (AHR). CS exposure in asthmatic mice also increased the number of neutrophils and macrophages in the bronchoalveolar fluid. Treatment with Dex in asthmatic mice without CS exposure reduced airway resistance, AHR and airway eosinophilia. In asthmatic mice with CS exposure, however, Dex treatment unexpectedly increased lung tissue resistance and restored AHR that had been otherwise suppressed. Dex treatment in asthmatic mice with CS exposure inhibited eosinophilic inflammation but conversely exacerbated neutrophilic inflammation. On the other hand, treatment with Rof in asthmatic mice without CS exposure reduced airway resistance and airway eosinophilia, although the inhibitory effect of Rof on AHR was unremarkable. In asthmatic mice with CS exposure, Rof treatment did not exacerbate lung tissue resistance but modestly restored AHR, without any significant effects on airway inflammation. These results suggest that CS exposure mitigates sensitivity to both Dex and Rof. In asthmatic mice with CS exposure, Dex is still effective in reducing eosinophilic inflammation but increases lung tissue resistance, AHR and neutrophilic inflammation. Rof is ineffective in improving lung function and inflammation in asthmatic mice with CS exposure. This study did not support our initial hypothesis that Rof might be more effective than glucocorticoids for improving asthma in smokers. However, glucocorticoids may have a detrimental effect on smoking asthmatics.
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Affiliation(s)
- Junichiro Kawagoe
- Department of Respiratory Medicine, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuou, Ami-machi, Inashiki-gun, Ibaraki 300-0395, Japan; Department of Respiratory Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
| | - Yuki Maeda
- Department of Respiratory Medicine, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuou, Ami-machi, Inashiki-gun, Ibaraki 300-0395, Japan.
| | - Ryota Kikuchi
- Department of Respiratory Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
| | - Maki Takahashi
- CMIC Pharma Science Co.,Ltd., Bioresearch Center, 10221 Kobuchisawa-cho, Hokuto-shi, Yamanashi, 408-0044, Japan.
| | - Jun-Ichi Fuchikami
- CMIC Pharma Science Co.,Ltd., Bioresearch Center, 10221 Kobuchisawa-cho, Hokuto-shi, Yamanashi, 408-0044, Japan.
| | - Takao Tsuji
- Otsuki Municipal Hospital, 1225 Hanasaki, Otsuki-machi, 401-0015 Yamanashi, Japan.
| | - Yuta Kono
- Department of Respiratory Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
| | - Shinji Abe
- Department of Respiratory Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
| | - Kazuhiro Yamaguchi
- Department of Respiratory Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
| | - Nobuyuki Koyama
- Department of Clinical Oncology, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuou, Ami-machi, Inashiki-gun, Ibaraki 300-0395, Japan.
| | - Hiroyuki Nakamura
- Department of Respiratory Medicine, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuou, Ami-machi, Inashiki-gun, Ibaraki 300-0395, Japan.
| | - Kazutetsu Aoshiba
- Department of Respiratory Medicine, Tokyo Medical University Ibaraki Medical Center, 3-20-1 Chuou, Ami-machi, Inashiki-gun, Ibaraki 300-0395, Japan.
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Dermer H, Theotoka D, Lee CJ, Chhadva P, Hackam AS, Galor A, Kumar N. Total Tear IgE Levels Correlate with Allergenic and Irritating Environmental Exposures in Individuals with Dry Eye. J Clin Med 2019; 8:jcm8101627. [PMID: 31590324 PMCID: PMC6832222 DOI: 10.3390/jcm8101627] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 09/27/2019] [Accepted: 10/02/2019] [Indexed: 12/14/2022] Open
Abstract
Dry eye (DE) and allergic conjunctivitis may present similarly, and it remains unclear whether some individuals have an underlying allergic component to their DE. To better understand this relationship, we performed a cross-sectional study in 75 individuals with DE symptoms and/or signs. Immunoglobulin E (IgE) levels in tear samples were quantified and home environmental exposures assessed via standardized survey. Tears were collected by Schirmer strip, and total tear IgE levels were quantified using enzyme-linked immunosorbent assay (ELISA). Data were analyzed using descriptive statistics and linear and logistic regressions. The main outcome measures were total tear IgE levels and their association with environmental exposures. The mean age of the subjects was 66.2 ± 7.8 years. Sixty-two individuals had dry eye symptoms (Dry Eye Questionnaire-5 ≥ 6), and 75 had one or more signs of DE. Detectable total tear IgE levels were observed in 76% of subjects, and 17.3% had high levels (>1 ng/mL). Individuals with exposure to pet(s) (odds ratio (OR) 11.5, p = 0.002) and smoke (OR 38.6, p = 0.008) at home were more likely to have high IgE levels compared to those not exposed. Individuals with tears collected during spring or summer were 3.9 times (p = 0.028) more likely to have high IgE compared to those sampled at other times of year. Subjects born in the US were 3.45 times (p = 0.010) more likely to have high IgE compared to individuals born outside the US. To conclude, a majority of individuals with DE symptoms and/or signs had detectable IgE levels in their tears. High tear IgE levels were correlated with allergy season and exposures in the home linked with allergy.
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Affiliation(s)
- Harrison Dermer
- Miller School of Medicine, University of Miami, Miami, FL 33136, USA.
| | - Despoina Theotoka
- Bascom Palmer Eye Institute, University of Miami, Miami, FL 33136, USA.
| | - Charity J Lee
- Miller School of Medicine, University of Miami, Miami, FL 33136, USA.
| | - Priyanka Chhadva
- Department of Ophthalmology, Illinois Eye and Ear Infirmary, University of Illinois, Chicago, IL 60612, USA.
| | - Abigail S Hackam
- Bascom Palmer Eye Institute, University of Miami, Miami, FL 33136, USA.
| | - Anat Galor
- Bascom Palmer Eye Institute, University of Miami, Miami, FL 33136, USA.
| | - Naresh Kumar
- Department of Public Health Sciences, University of Miami, Miami, FL, 33136, USA.
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Gahring LC, Myers EJ, Dunn DM, Weiss RB, Rogers SW. Lung eosinophilia induced by house dust mites or ovalbumin is modulated by nicotinic receptor α7 and inhibited by cigarette smoke. Am J Physiol Lung Cell Mol Physiol 2018; 315:L553-L562. [PMID: 29975102 PMCID: PMC6230881 DOI: 10.1152/ajplung.00230.2018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 06/21/2018] [Accepted: 07/03/2018] [Indexed: 12/16/2022] Open
Abstract
Eosinophilia (EOS) is an important component of airway inflammation and hyperresponsiveness in allergic reactions including those leading to asthma. Although cigarette smoking (CS) is a significant contributor to long-term adverse outcomes in these lung disorders, there are also the curious reports of its ability to produce acute suppression of inflammatory responses including EOS through poorly understood mechanisms. One possibility is that proinflammatory processes are suppressed by nicotine in CS acting through nicotinic receptor α7 (α7). Here we addressed the role of α7 in modulating EOS with two mouse models of an allergic response: house dust mites (HDM; Dermatophagoides sp.) and ovalbumin (OVA). The influence of α7 on EOS was experimentally resolved in wild-type mice or in mice in which a point mutation of the α7 receptor (α7E260A:G) selectively restricts normal signaling of cellular responses. RNA analysis of alveolar macrophages and the distal lung epithelium indicates that normal α7 function robustly impacts gene expression in the epithelium to HDM and OVA but to different degrees. Notable was allergen-specific α7 modulation of Ccl11 and Ccl24 (eotaxins) expression, which was enhanced in HDM but suppressed in OVA EOS. CS suppressed EOS induced by both OVA and HDM, as well as the inflammatory genes involved, regardless of α7 genotype. These results suggest that EOS in response to HDM or OVA is through signaling pathways that are modulated in a cell-specific manner by α7 and are distinct from CS suppression.
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Affiliation(s)
- Lorise C Gahring
- Geriatric Research, Education, and Clinical Center, Salt Lake City Department of Veterans Affairs Medical Center , Salt Lake City, Utah
- Division of Geriatrics, Department of Internal Medicine, University of Utah School of Medicine , Salt Lake City, Utah
| | - Elizabeth J Myers
- Division of Geriatrics, Department of Internal Medicine, University of Utah School of Medicine , Salt Lake City, Utah
| | - Diane M Dunn
- Department of Human Genetics, University of Utah School of Medicine , Salt Lake City, Utah
| | - Robert B Weiss
- Department of Human Genetics, University of Utah School of Medicine , Salt Lake City, Utah
| | - Scott W Rogers
- Geriatric Research, Education, and Clinical Center, Salt Lake City Department of Veterans Affairs Medical Center , Salt Lake City, Utah
- Department of Neurobiology and Anatomy, University of Utah School of Medicine , Salt Lake City, Utah
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Association between inflammatory potential of diet and risk of lung cancer among smokers in a prospective study in Singapore. Eur J Nutr 2018; 58:2755-2766. [PMID: 30255403 DOI: 10.1007/s00394-018-1825-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 09/18/2018] [Indexed: 12/26/2022]
Abstract
BACKGROUND Diet and inflammation have been suggested to be important risk factors for lung cancer. We examined the ability of the dietary inflammatory index (DII®) to predict lung cancer in the Singapore Chinese Health Study (SCHS). The DII is a diet quality index based on the literature linking foods and nutrients with inflammatory biomarkers. PATIENTS AND METHODS Using data from the SCHS for 60,232 participants, including 1851 lung cancer cases, we investigated the associations of baseline DII scores calculated from a food frequency questionnaire with risk of developing lung cancer over an average of 17.6 years of follow-up. Hazard ratios (HR) were estimated using Cox regression, adjusting for smoking status and other risk factors. RESULTS After excluding cancers diagnosed in the first 2 years of follow-up, the DII was non-significantly associated with risk of lung cancer (HRQ5vsQ1 = 1.13; 95% CI 0.94-1.35; P-trend = 0.24) after adjusting for age, dialect group, sex, interview year, education, body mass index, total calorie intake, physical activity and various smoking variables. In stratified analysis, stronger, statistically significant associations were evident in current smokers (HR 1.44; 95% CI 1.11-1.86; Ptrend = 0.03, P for interaction = 0.003) and in male ever-smokers (HRQ5vsQ1 = 1.37; 95% CI 1.07-1.77; P-trend = 0.03). CONCLUSION A pro-inflammatory diet, as shown by higher DII scores, is associated with an elevated risk of lung cancer for subjects with a history of smoking. Public health measures should be adopted to promote consumption of a healthy, anti-inflammatory diet to reduce the risk of lung cancer, especially in current and former smokers.
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Belvisi MG, Baker K, Malloy N, Raemdonck K, Dekkak B, Pieper M, Nials AT, Birrell MA. Modelling the asthma phenotype: impact of cigarette smoke exposure. Respir Res 2018; 19:89. [PMID: 29747661 PMCID: PMC5946402 DOI: 10.1186/s12931-018-0799-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 04/29/2018] [Indexed: 12/28/2022] Open
Abstract
Background Asthmatics that are exposed to inhaled pollutants such as cigarette smoke (CS) have increased symptom severity. Approximately 25% of adult asthmatics are thought to be active smokers and many sufferers, especially in the third world, are exposed to high levels of inhaled pollutants. The mechanism by which CS or other airborne pollutants alter the disease phenotype and the effectiveness of treatment in asthma is not known. The aim of this study was to determine the impact of CS exposure on the phenotype and treatment sensitivity of rodent models of allergic asthma. Methods Models of allergic asthma were configured that mimicked aspects of the asthma phenotype and the effect of CS exposure investigated. In some experiments, treatment with gold standard asthma therapies was investigated and end-points such as airway cellular burden, late asthmatic response (LAR) and airway hyper-Reactivity (AHR) assessed. Results CS co-exposure caused an increase in the LAR but interestingly attenuated the AHR. The effectiveness of LABA, LAMA and glucocorticoid treatment on LAR appeared to be retained in the CS-exposed model system. The eosinophilia or lymphocyte burden was not altered by CS co-exposure, nor did CS appear to alter the effectiveness of glucocorticoid treatment. Steroids, however failed to reduce the neutrophilic inflammation in sensitized mice exposed to CS. Conclusions These model data have certain parallels with clinical findings in asthmatics, where CS exposure did not impact the anti-inflammatory efficacy of steroids but attenuated AHR and enhanced symptoms such as the bronchospasm associated with the LAR. These model systems may be utilised to investigate how CS and other airborne pollutants impact the asthma phenotype; providing the opportunity to identify novel targets.
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Affiliation(s)
- Maria G Belvisi
- Respiratory Pharmacology, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK.,Respiratory, Inflammation Autoimmunity RIA IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden.,MRC and Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, UK
| | - Katie Baker
- Respiratory Pharmacology, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - Nicole Malloy
- Respiratory Pharmacology, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - Kristof Raemdonck
- Respiratory Pharmacology, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK.,Department of Anatomy, Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, 4200-319, Porto, Portugal.,Center for Health Technology and Services Research (CINTESIS), Faculty of Medicine, University of Porto, Rua Dr. Plácido da Costa, 4200-450, Porto, Portugal
| | - Bilel Dekkak
- Respiratory Pharmacology, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - Michael Pieper
- Boehringer Ingelheim Pharma GmbH & Co. KG, Rhein, Germany
| | | | - Mark A Birrell
- Respiratory Pharmacology, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, Exhibition Road, London, SW7 2AZ, UK. .,Respiratory, Inflammation Autoimmunity RIA IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden. .,MRC and Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, UK.
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Mertens TCJ, van der Does AM, Kistemaker LE, Ninaber DK, Taube C, Hiemstra PS. Cigarette smoke differentially affects IL-13-induced gene expression in human airway epithelial cells. Physiol Rep 2017; 5:5/13/e13347. [PMID: 28701525 PMCID: PMC5506530 DOI: 10.14814/phy2.13347] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 06/13/2017] [Indexed: 11/24/2022] Open
Abstract
Allergic airways inflammation in asthma is characterized by an airway epithelial gene signature composed of POSTN, CLCA1, and SERPINB2 This Th2 gene signature is proposed as a tool to classify patients with asthma into Th2-high and Th2-low phenotypes. However, many asthmatics smoke and the effects of cigarette smoke exposure on the epithelial Th2 gene signature are largely unknown. Therefore, we investigated the combined effect of IL-13 and whole cigarette smoke (CS) on the Th2 gene signature and the mucin-related genes MUC5AC and SPDEF in air-liquid interface differentiated human bronchial (ALI-PBEC) and tracheal epithelial cells (ALI-PTEC). Cultures were exposed to IL-13 for 14 days followed by 5 days of IL-13 with CS exposure. Alternatively, cultures were exposed once daily to CS for 14 days, followed by 5 days CS with IL-13. POSTN, SERPINB2, and CLCA1 expression were measured 24 h after the last exposure to CS and IL-13. In both models POSTN, SERPINB2, and CLCA1 expression were increased by IL-13. CS markedly affected the IL-13-induced Th2 gene signature as indicated by a reduced POSTN, CLCA1, and MUC5AC expression in both models. In contrast, IL-13-induced SERPINB2 expression remained unaffected by CS, whereas SPDEF expression was additively increased. Importantly, cessation of CS exposure failed to restore IL-13-induced POSTN and CLCA1 expression. We show for the first time that CS differentially affects the IL-13-induced gene signature for Th2-high asthma. These findings provide novel insights into the interaction between Th2 inflammation and cigarette smoke that is important for asthma pathogenesis and biomarker-guided therapy in asthma.
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Affiliation(s)
- Tinne C J Mertens
- Department of Pulmonology, Leiden University Medical Center, Leiden, The Netherlands
| | - Anne M van der Does
- Department of Pulmonology, Leiden University Medical Center, Leiden, The Netherlands
| | - Loes E Kistemaker
- Department of Molecular Pharmacology, University of Groningen, Groningen, The Netherlands
| | - Dennis K Ninaber
- Department of Pulmonology, Leiden University Medical Center, Leiden, The Netherlands
| | - Christian Taube
- Department of Pulmonology, Leiden University Medical Center, Leiden, The Netherlands
| | - Pieter S Hiemstra
- Department of Pulmonology, Leiden University Medical Center, Leiden, The Netherlands
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Brüggemann TR, Fernandes P, Oliveira LDM, Sato MN, Martins MDA, Arantes-Costa FM. Cigarette Smoke Increases CD8α + Dendritic Cells in an Ovalbumin-Induced Airway Inflammation. Front Immunol 2017; 8:718. [PMID: 28670318 PMCID: PMC5472682 DOI: 10.3389/fimmu.2017.00718] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 06/02/2017] [Indexed: 12/22/2022] Open
Abstract
Asthma is an allergic lung disease and, when associated to cigarette smoke exposition, some patients show controversial signs about lung function and other inflammatory mediators. Epidemiologic and experimental studies have shown both increasing and decreasing inflammation in lungs of subjects with asthma and exposed to cigarette smoke. Therefore, in this study, we analyzed how cigarette smoke affects pro-inflammatory and anti-inflammatory mediators in a murine model of allergic pulmonary inflammation. We sensitized Balb/c mice to ovalbumin (OVA) with two intraperitoneal injections. After sensitization, the animals were exposed to cigarette smoke twice a day, 30 min per exposition, for 12 consecutive days. In order to drive the cell to the lungs, four aerosol challenges were performed every 48 h with the same allergen of sensitization. OVA sensitization and challenge developed pulmonary Th2 characteristic response with increased airway responsiveness, remodeling, increased levels of IgE, interleukin (IL)-4, and IL-13. Cigarette smoke, unexpectedly, reduced the levels of IL-4 and IL-13 and simultaneously decreased anti-inflammatory cytokines as IL-10 and transforming growth factor (TGF)-β in sensitized and challenged animals. OVA combined with cigarette smoke exposition decreased the number of eosinophils in bronchoalveolar lavage and increased the number of neutrophils in lung. The combination of cigarette smoke and lung allergy increased recruitment of lymphoid dendritic cells (DCs) into lymph nodes, which may be the leading cause to an increase in number and activation of CD8+ T cells in lungs. In addition, lung allergy and cigarette smoke exposure decreased an important regulatory subtype of DC such as plasmacytoid DC as well as its activation by expression of CD86, PDL2, and ICOSL, and it was sufficient to decrease T regs influx and anti-inflammatory cytokines release such as IL-10 and TGF-β but not enough to diminish the structural changes. In conclusion, we observed, in this model, that OVA sensitization and challenge combined with cigarette smoke exposure leads to mischaracterization of the Th2 response of asthma by decreasing the number of eosinophils, IL-4, and IL-13 and increasing number of neutrophils, which is related to the increased number of CD8ɑ+ DCs and CD8+ T cells as well as reduction of the regulatory cells and its released cytokines.
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Affiliation(s)
- Thayse Regina Brüggemann
- Laboratory of Experimental Therapeutics LIM20, Department of Medicine, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil.,Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA, United States
| | - Paula Fernandes
- Laboratory of Experimental Therapeutics LIM20, Department of Medicine, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - Luana de Mendonça Oliveira
- Laboratory of Medical Investigation LIM56, School of Medicine, Division of Clinical Dermatology, University of Sao Paulo, Sao Paulo, Brazil
| | - Maria Notomi Sato
- Laboratory of Medical Investigation LIM56, School of Medicine, Division of Clinical Dermatology, University of Sao Paulo, Sao Paulo, Brazil
| | - Mílton de Arruda Martins
- Laboratory of Experimental Therapeutics LIM20, Department of Medicine, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
| | - Fernanda Magalhães Arantes-Costa
- Laboratory of Experimental Therapeutics LIM20, Department of Medicine, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil
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Mertens TCJ, Karmouty-Quintana H, Taube C, Hiemstra PS. Use of airway epithelial cell culture to unravel the pathogenesis and study treatment in obstructive airway diseases. Pulm Pharmacol Ther 2017; 45:101-113. [PMID: 28502841 DOI: 10.1016/j.pupt.2017.05.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 04/19/2017] [Accepted: 05/10/2017] [Indexed: 12/12/2022]
Abstract
Asthma and chronic obstructive pulmonary disease (COPD) are considered as two distinct obstructive diseases. Both chronic diseases share a component of airway epithelial dysfunction. The airway epithelium is localized to deal with inhaled substances, and functions as a barrier preventing penetration of such substances into the body. In addition, the epithelium is involved in the regulation of both innate and adaptive immune responses following inhalation of particles, allergens and pathogens. Through triggering and inducing immune responses, airway epithelial cells contribute to the pathogenesis of both asthma and COPD. Various in vitro research models have been described to study airway epithelial cell dysfunction in asthma and COPD. However, various considerations and cautions have to be taken into account when designing such in vitro experiments. Epithelial features of asthma and COPD can be modelled by using a variety of disease-related invoking substances either alone or in combination, and by the use of primary cells isolated from patients. Differentiation is a hallmark of airway epithelial cells, and therefore models should include the ability of cells to differentiate, as can be achieved in air-liquid interface models. More recently developed in vitro models, including precision cut lung slices, lung-on-a-chip, organoids and human induced pluripotent stem cells derived cultures, provide novel state-of-the-art alternatives to the conventional in vitro models. Furthermore, advanced models in which cells are exposed to respiratory pathogens, aerosolized medications and inhaled toxic substances such as cigarette smoke and air pollution are increasingly used to model e.g. acute exacerbations. These exposure models are relevant to study how epithelial features of asthma and COPD are affected and provide a useful tool to study the effect of drugs used in treatment of asthma and COPD. These new developments are expected to contribute to a better understanding of the complex gene-environment interactions that contribute to development and progression of asthma and COPD.
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Affiliation(s)
- Tinne C J Mertens
- Department of Pulmonology, Leiden University Medical Center, Leiden, The Netherlands; Department of Biochemistry and Molecular Biology, The University of Texas Health Science Center at Houston, Houston, TX, USA.
| | - Harry Karmouty-Quintana
- Department of Biochemistry and Molecular Biology, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Christian Taube
- Department of Pulmonology, Leiden University Medical Center, Leiden, The Netherlands
| | - Pieter S Hiemstra
- Department of Pulmonology, Leiden University Medical Center, Leiden, The Netherlands
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Camargo CP, Fernandes FA, Lee MHM, Silva LCM, Besteiro JM, Gemperli R. The positive effect of Botulinum toxin type A on the viability of random flap in tobacco exposed in rats. Acta Cir Bras 2016; 31:720-723. [DOI: 10.1590/s0102-865020160110000003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 10/13/2016] [Indexed: 11/21/2022] Open
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10
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Danyal K, de Jong W, O'Brien E, Bauer RA, Heppner DE, Little AC, Hristova M, Habibovic A, van der Vliet A. Acrolein and thiol-reactive electrophiles suppress allergen-induced innate airway epithelial responses by inhibition of DUOX1 and EGFR. Am J Physiol Lung Cell Mol Physiol 2016; 311:L913-L923. [PMID: 27612966 DOI: 10.1152/ajplung.00276.2016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 09/05/2016] [Indexed: 01/27/2023] Open
Abstract
Acrolein is a major thiol-reactive component of cigarette smoke (CS) that is thought to contribute to increased asthma incidence associated with smoking. Here, we explored the effects of acute acrolein exposure on innate airway responses to two common airborne allergens, house dust mite and Alternaria alternata, and observed that acrolein exposure of C57BL/6 mice (5 ppm, 4 h) dramatically inhibited innate airway responses to subsequent allergen challenge, demonstrated by attenuated release of the epithelial-derived cytokines IL-33, IL-25, and IL-1α. Acrolein and other anti-inflammatory thiol-reactive electrophiles, cinnamaldehyde, curcumin, and sulforaphane, similarly inhibited allergen-induced production of these cytokines from human or murine airway epithelial cells in vitro. Based on our previous observations indicating the importance of Ca2+-dependent signaling, activation of the NADPH oxidase DUOX1, and Src/EGFR-dependent signaling in allergen-induced epithelial secretion of these cytokines, we explored the impact of acrolein on these pathways. Acrolein and other thiol-reactive electrophiles were found to dramatically prevent allergen-induced activation of DUOX1 as well as EGFR, and acrolein was capable of inhibiting EGFR tyrosine kinase activity via modification of C797. Biotin-labeling strategies indicated increased cysteine modification and carbonylation of Src, EGFR, as well as DUOX1, in response to acrolein exposure in vitro and in vivo, suggesting that direct alkylation of these proteins on accessible cysteine residues may be responsible for their inhibition. Collectively, our findings indicate a novel anti-inflammatory mechanism of CS-derived acrolein and other thiol-reactive electrophiles, by directly inhibiting DUOX1- and EGFR-mediated airway epithelial responses to airborne allergens.
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Affiliation(s)
- Karamatullah Danyal
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Vermont, Burlington, Vermont
| | - Willem de Jong
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Vermont, Burlington, Vermont
| | - Edmund O'Brien
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Vermont, Burlington, Vermont
| | - Robert A Bauer
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Vermont, Burlington, Vermont
| | - David E Heppner
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Vermont, Burlington, Vermont
| | - Andrew C Little
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Vermont, Burlington, Vermont
| | - Milena Hristova
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Vermont, Burlington, Vermont
| | - Aida Habibovic
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Vermont, Burlington, Vermont
| | - Albert van der Vliet
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Vermont, Burlington, Vermont
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Cahn A, Boyce M, Mistry S, Musani N, Rambaran C, Storey J, Ventresca P, Michel O. Randomized trial of allergen-induced asthmatic response in smokers and non-smokers: effects of inhaled corticosteroids. Clin Exp Allergy 2016; 45:1531-41. [PMID: 26251958 DOI: 10.1111/cea.12610] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 07/15/2015] [Accepted: 07/19/2015] [Indexed: 01/24/2023]
Abstract
BACKGROUND It is thought that asthmatics who smoke cigarettes respond less well to inhaled corticosteroid (ICS) therapy than asthmatics who do not smoke. OBJECTIVE To evaluate the effects of smoking on allergen-induced airway responses in asthmatics treated with ICS. METHODS Randomized, double-blind, crossover study evaluating twice daily fluticasone propionate (FP) 100 μg, FP 500 μg and placebo, for 7 days, on allergen-induced asthmatic responses in 18 non-smoking and 17 smoking atopic asthmatics (NCT01400906). At 1 h post-morning dose on Day 6, forced expiratory volume in 1 sec (FEV1 ) was measured up to 10 h post-challenge. Exhaled nitric oxide (eNO), induced sputum cell counts, and responsiveness to methacholine were assessed the following day. RESULTS The late asthmatic response (LAR) was suppressed by FP in smokers and non-smokers; with placebo, the LAR was also attenuated in smokers versus non-smokers (adjusted mean minimum change in FEV1 (L) over 4-10 h [95% CI] in non-smokers: placebo -1.01 [1.31, 0.70], FP 100 μg -0.38 [0.54, 0.22], FP 500 μg -0.35 [0.54-0.22]; and in smokers: placebo -0.63 [0.84, 0.43]; FP 100 μg -0.44 [0.65, 0.23]; FP 500 μg -0.46 [0.59-0.32]). The Early AR was suppressed by FP treatment in non-smokers, but was not impacted in smokers. The reduction in methacholine hyperresponsiveness after FP was greater in non-smokers (1.5- and twofold doubling dose difference from placebo after FP 100 μg and FP 500 μg) than smokers (1.0 and 1.3 difference, respectively). Allergen-induced increases in eNO and sputum eosinophils were lower in smokers than non-smokers and were suppressed in both groups by FP. CONCLUSION AND CLINICAL RELEVANCE Allergen-induced LARs were of a similar amplitude in both smoking and non-smoking atopic asthmatics at the end of ICS treatment, but attenuation of the LAR in smokers was only partly associated with ICS treatment. The marked attenuation of the LAR observed in smokers in the absence of ICS treatment is a novel observation.
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Affiliation(s)
- A Cahn
- GlaxoSmithKline, Stevenage, UK
| | - M Boyce
- Hammersmith Medicines Research Ltd, London, UK
| | - S Mistry
- GlaxoSmithKline, Stockley Park, UK
| | - N Musani
- GlaxoSmithKline, Stockley Park, UK
| | | | | | | | - O Michel
- Clinic of Immuno-allergology, CHU Brugmann (ULB Université Libre de Bruxelles), Brussels, Belgium
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O'Brien E, Spiess PC, Habibovic A, Hristova M, Bauer RA, Randall MJ, Poynter ME, van der Vliet A. Inhalation of the reactive aldehyde acrolein promotes antigen sensitization to ovalbumin and enhances neutrophilic inflammation. J Immunotoxicol 2015; 13:191-7. [PMID: 25875327 DOI: 10.3109/1547691x.2015.1033571] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Acrolein (ACR), an α,β-unsaturated aldehyde and a major component of tobacco smoke, is a highly reactive electrophilic respiratory irritant implicated in asthma pathogenesis and severity. However, few studies have directly investigated the influence of ACR exposure on allergen sensitization and pulmonary inflammation. The present study was designed to examine the impact of ACR inhalation on allergic sensitization to the inhaled antigen ovalbumin (OVA), as well as pulmonary inflammation during subsequent OVA challenge. Adult male C57BL/6 mice were exposed to inhaled OVA (1%, 30 min/day, 4 days/week) and/or ACR (5 ppm, 4 h/day, 4 days/week) over 2 weeks and subsequently challenged with aerosolized OVA (1%, 30 min/day) over three consecutive days. Serum anti-OVA IgG1 levels were increased significantly in animals exposed to both OVA and ACR, compared to animals exposed to either OVA or ACR alone. In addition, differential cell counts and histological analysis revealed an increase in BAL neutrophils in animals exposed to both OVA and ACR. However, exposure to both OVA and ACR did not influence mRNA expression of the cytokines il5, il10, il13 or tnfa, but significantly increased mRNA expression of ccl20. Moreover, ACR exposure enhanced lung mRNA levels of il17f and tgfb1, suggesting development of enhanced inhalation tolerance to OVA. Overall, the findings indicate that ACR inhalation can promote airway-mediated sensitization to otherwise innocuous inhaled antigens, such as OVA, but also enhances immune tolerance, thereby favoring neutrophilic airway inflammation.
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Affiliation(s)
| | | | | | | | | | | | - Matthew E Poynter
- b Department of Medicine , College of Medicine, University of Vermont , Burlington , VT , USA
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13
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Spiess PC, Kasahara D, Habibovic A, Hristova M, Randall MJ, Poynter ME, van der Vliet A. Acrolein exposure suppresses antigen-induced pulmonary inflammation. Respir Res 2013; 14:107. [PMID: 24131734 PMCID: PMC3852782 DOI: 10.1186/1465-9921-14-107] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 10/08/2013] [Indexed: 12/20/2022] Open
Abstract
Background Adverse health effects of tobacco smoke arise partly from its influence on innate and adaptive immune responses, leading to impaired innate immunity and host defense. The impact of smoking on allergic asthma remains unclear, with various reports demonstrating that cigarette smoke enhances asthma development but can also suppress allergic airway inflammation. Based on our previous findings that immunosuppressive effects of smoking may be largely attributed to one of its main reactive electrophiles, acrolein, we explored the impact of acrolein exposure in a mouse model of ovalbumin (OVA)-induced allergic asthma. Methods C57BL/6 mice were sensitized to ovalbumin (OVA) by intraperitoneal injection with the adjuvant aluminum hydroxide on days 0 and 7, and challenged with aerosolized OVA on days 14–16. In some cases, mice were also exposed to 5 ppm acrolein vapor for 6 hrs/day on days 14–17. Lung tissues or brochoalveolar lavage fluids (BALF) were collected either 6 hrs after a single initial OVA challenge and/or acrolein exposure on day 14 or 48 hrs after the last OVA challenge, on day 18. Inflammatory cells and Th1/Th2 cytokine levels were measured in BALF, and lung tissue samples were collected for analysis of mucus and Th1/Th2 cytokine expression, determination of protein alkylation, cellular thiol status and transcription factor activity. Results Exposure to acrolein following OVA challenge of OVA-sensitized mice resulted in markedly attenuated allergic airway inflammation, demonstrated by decreased inflammatory cell infiltrates, mucus hyperplasia and Th2 cytokines. Acrolein exposure rapidly depleted lung tissue glutathione (GSH) levels, and induced activation of the Nrf2 pathway, indicated by accumulation of Nrf2, increased alkylation of Keap1, and induction of Nrf2-target genes such as HO-1. Additionally, analysis of inflammatory signaling pathways showed suppressed activation of NF-κB and marginally reduced activation of JNK in acrolein-exposed lungs, associated with increased carbonylation of RelA and JNK. Conclusion Acrolein inhalation suppresses Th2-driven allergic inflammation in sensitized animals, due to direct protein alkylation resulting in activation of Nrf2 and anti-inflammatory gene expression, and inhibition of NF-κB or JNK signaling. Our findings help explain the paradoxical anti-inflammatory effects of cigarette smoke exposure in allergic airways disease.
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Affiliation(s)
| | | | | | | | | | | | - Albert van der Vliet
- Department of Pathology, College of Medicine, D205 Given Building, 89 Beaumont Ave, Burlington, VT 05405, USA.
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14
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Van De Ven MOM, van Zundert RMP, Engels RCME. Effects of asthma on nicotine dependence development and smoking cessation attempts in adolescence. J Asthma 2013; 50:250-9. [PMID: 23347267 DOI: 10.3109/02770903.2013.766751] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The aim of this study was to investigate whether asthma predicts the development of nicotine dependence and unsuccessful smoking cessation attempts in adolescent smokers. In addition, whether nicotine dependence could explain the relation between asthma and unsuccessful cessation attempts was also investigated. METHODS A longitudinal survey study was conducted among 286 adolescents (aged 12-15 at T1) who had never used tobacco at baseline and were current smokers at follow-up 22 months later. Regression analyses were applied to test the effects of four asthma indicators (current wheeze, indication of asthma, symptom severity, and current diagnosed asthma) on nicotine dependence and smoking cessation attempts. RESULTS Both adolescents who had an indication of asthma as well as adolescents with higher symptom severity developed higher levels of nicotine dependence over time and made a greater number of unsuccessful smoking cessation attempts in the past 12 months compared to those without asthma or less severe symptoms. Nicotine dependence partly mediated the effects of asthma symptoms on unsuccessful cessation attempts. Current wheezing and current diagnosed asthma did not predict nicotine dependence or unsuccessful quit attempts. CONCLUSIONS Nicotine dependence develops more quickly in youth with symptoms of asthma, and this partly explains the increased number of unsuccessful cessation attempts of adolescents with asthma. Smoking prevention and smoking cessation programs are encouraged to provide additional support for youth with asthma, focusing on both the physiological and psychological aspects of dependence.
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15
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Hizume DC, Toledo AC, Moriya HT, Saraiva-Romanholo BM, Almeida FM, Arantes-Costa FM, Vieira RP, Dolhnikoff M, Kasahara DI, Martins MA. Cigarette smoke dissociates inflammation and lung remodeling in OVA-sensitized and challenged mice. Respir Physiol Neurobiol 2012; 181:167-76. [PMID: 22446562 DOI: 10.1016/j.resp.2012.03.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 03/08/2012] [Accepted: 03/08/2012] [Indexed: 01/29/2023]
Abstract
We evaluated the effects of cigarette smoke (CS) on lung inflammation and remodeling in a model of ovalbumin (OVA)-sensitized and OVA-challenged mice. Male BALB/c mice were divided into 4 groups: non-sensitized and air-exposed (control); non-sensitized and exposed to cigarette smoke (CS), sensitized and air-exposed (OVA) (50 μg+OVA 1% 3 times/week for 3 weeks) and sensitized and cigarette smoke exposed mice (OVA+CS). IgE levels were not affected by CS exposure. The increases in total bronchoalveolar fluid cells in the OVA group were attenuated by co-exposure to CS, as were the changes in IL-4, IL-5, and eotaxin levels as well as tissue elastance (p<0.05). In contrast, only the OVA+CS group showed a significant increase in the protein expression of IFN-γ, VEGF, GM-CSF and collagen fiber content (p<0.05). In our study, exposure to cigarette smoke in OVA-challenged mice resulted in an attenuation of pulmonary inflammation but led to an increase in pulmonary remodeling and resulted in the dissociation of airway inflammation from lung remodeling.
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Affiliation(s)
- Deborah C Hizume
- Department of Medicine (LIM-20), School of Medicine, University of Sao Paulo, Sao Paulo, Brazil.
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16
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Meghji Z, Dua B, Watson RM, Gauvreau GM, O'Byrne PM. Allergen inhalation challenge in smoking compared with non-smoking asthmatic subjects. Clin Exp Allergy 2011; 41:1084-90. [PMID: 21631611 DOI: 10.1111/j.1365-2222.2011.03782.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Smoking asthmatics experience more severe symptoms, require more rescue medication and have more asthma-related hospitalizations than non-smoking asthmatics. However, studies in mice suggest that mainstream cigarette smoke may reduce airway inflammation and may attenuate airway hyperresponsiveness. A comparison of allergen-induced airway inflammatory responses of smoking and non-smoking atopic asthmatics has not been examined previously. OBJECTIVES To determine whether allergen-induced airway responses and inflammatory profiles are attenuated in smoking when compared with non-smoking mild allergic asthmatic subjects. METHODS Allergen inhalation challenges were performed in 13 smoking and 19 non-smoking mild allergic asthmatic subjects. The forced expired volume in 1 s (FEV(1) ) was measured up to 7 h after allergen inhalation. Methacholine airway responsiveness was measured before and at 24 h after allergen and sputum was induced before and at 7 and 24 h after allergen. RESULTS Both the smoking and non-smoking groups developed similar allergen-induced falls in FEV(1) during the early and late asthmatic responses and similar increases in allergen-induced airway eosinophils. The mean maximum fall in FEV(1) during the late response was 16.3 ± 4.3% in non-smokers and 12.9 ± 7.2% in smokers. The smoking asthmatics, however, did not develop allergen-induced methacholine airway hyperresponsiveness, whereas the non-smoking controls developed a 1.18 doubling dose shift in methacholine PC(20) (P < 0.05). CONCLUSIONS AND CLINICAL RELEVANCE Mild allergic asthmatic subjects, who were current smokers with a mean 6-year pack history, develop allergen-induced eosinophilic airway inflammation and late responses, similar in magnitude to non-smoking asthmatics, but do not develop methacholine airway hyperresponsiveness associated with the allergen-induced airway eosinophilia.
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Affiliation(s)
- Z Meghji
- Firestone Institute for Respiratory Health, St. Joseph's Hospital and Department of Medicine, McMaster University, Hamilton, Ontario, Canada
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17
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Kim DY, Kwon EY, Hong GU, Lee YS, Lee SH, Ro JY. Cigarette smoke exacerbates mouse allergic asthma through Smad proteins expressed in mast cells. Respir Res 2011; 12:49. [PMID: 21496353 PMCID: PMC3098800 DOI: 10.1186/1465-9921-12-49] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Accepted: 04/18/2011] [Indexed: 11/10/2022] Open
Abstract
Background Many studies have found that smoking reduces lung function, but the relationship between cigarette smoke and allergic asthma has not been clearly elucidated, particularly the role of mast cells. This study aimed to investigate the effects of smoke exposure on allergic asthma and its association with mast cells. Methods BALB/c mice were sensitized and challenged by OVA to induce asthma, and bone marrow-derived mast cells (BMMCs) were stimulated with antigen/antibody reaction. Mice or BMMCs were exposed to cigarette smoke or CSE solution for 1 mo or 6 h, respectively. The recruitment of inflammatory cells into BAL fluid or lung tissues was determined by Diff-Quik or H&E staining, collagen deposition by Sircol assay, penh values by a whole-body plethysmography, co-localization of tryptase and Smad3 by immunohistochemistry, IgE and TGF-β level by ELISA, expressions of Smads proteins, activities of signaling molecules, or TGF-β mRNA by immunoblotting and RT-PCR. Results Cigarette smoke enhanced OVA-specific IgE levels, penh values, recruitment of inflammatory cells including mast cells, expressions of smad family, TGF-β mRNA and proteins, and cytokines, phosphorylations of Smad2 and 3, and MAP kinases, co-localization of tryptase and Smad3, and collagen deposition more than those of BAL cells and lung tissues of OVA-induced allergic mice. CSE solution pretreatment enhanced expressions of TGF-β, Smad3, activities of MAP kinases, NF-κB/AP-1 or PAI-1 more than those of activated-BMMCs. Conclusions The data suggest that smoke exposure enhances antigen-induced mast cell activation via TGF-β/Smad signaling pathways in mouse allergic asthma, and that it exacerbates airway inflammation and remodeling.
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Affiliation(s)
- Dae Yong Kim
- Department of Pharmacology and Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-726, Korea
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18
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Botelho FM, Llop-Guevara A, Trimble NJ, Nikota JK, Bauer CMT, Lambert KN, Kianpour S, Jordana M, Stämpfli MR. Cigarette smoke differentially affects eosinophilia and remodeling in a model of house dust mite asthma. Am J Respir Cell Mol Biol 2011; 45:753-60. [PMID: 21317378 DOI: 10.1165/rcmb.2010-0404oc] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Although a similar prevalence of smoking is evident among patients with asthma and the general population, little is known about the impact of cigarette smoke on the immune inflammatory processes elicited by common environmental allergens. We investigated the impact of exposure to cigarette smoke on house dust mite (HDM)-induced allergic airway inflammation and its consequences for tissue remodeling and lung physiology in mice. BALB/c mice received intranasal HDMs daily, 5 days per week, for 3 weeks to establish chronic airway inflammation. Subsequently, mice were concurrently exposed to HDMs plus cigarette smoke, 5 days per week, for 2 weeks (HDMs + smoke). We observed significantly attenuated eosinophilia in the bronchoalveolar lavage of mice exposed to HDMs + smoke, compared with animals exposed only to HDMs. A similar activation of CD4 T cells and expression of IL-5, IL-13, and transforming growth factor-β was observed between HDM-treated and HDM + smoke-treated animals. Consistent with an effect on eosinophil trafficking, HDMs + smoke exposure attenuated the HDM-induced expression of eotaxin-1 and vascular cell adhesion molecule-1, whereas the survival of eosinophils and the numbers of blood eosinophils were not affected. Exposure to cigarette smoke also reduced the activation of B cells and the concentrations of serum IgE. Although the production of mucus decreased, collagen deposition significantly increased in animals exposed to HDMs + smoke, compared with animals exposed only to HDMs. Although airway resistance was unaffected, tissue resistance was significantly decreased in mice exposed to HDMs + smoke. Our findings demonstrate that cigarette smoke affects eosinophil migration without affecting airway resistance or modifying Th2 cell adaptive immunity in a murine model of HDM-induced asthma.
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Affiliation(s)
- Fernando M Botelho
- Department of Pathology and Molecular Medicine, Centre for Gene Therapeutics, McMaster University, 1200 Main Street West, Hamilton, ON, L8N 3Z5 Canada
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19
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Feng Y, Kong Y, Barnes PF, Huang FF, Klucar P, Wang X, Samten B, Sengupta M, Machona B, Donis R, Tvinnereim AR, Shams H. Exposure to cigarette smoke inhibits the pulmonary T-cell response to influenza virus and Mycobacterium tuberculosis. Infect Immun 2011; 79:229-37. [PMID: 20974820 PMCID: PMC3019896 DOI: 10.1128/iai.00709-10] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Revised: 08/31/2010] [Accepted: 10/19/2010] [Indexed: 12/18/2022] Open
Abstract
Smoking is associated with increased susceptibility to tuberculosis and influenza. However, little information is available on the mechanisms underlying this increased susceptibility. Mice were left unexposed or were exposed to cigarette smoke and then infected with Mycobacterium tuberculosis by aerosol or influenza A by intranasal infection. Some mice were given a DNA vaccine encoding an immunogenic M. tuberculosis protein. Gamma interferon (IFN-γ) production by T cells from the lungs and spleens was measured. Cigarette smoke exposure inhibited the lung T-cell production of IFN-γ during stimulation in vitro with anti-CD3, after vaccination with a construct expressing an immunogenic mycobacterial protein, and during infection with M. tuberculosis and influenza A virus in vivo. Reduced IFN-γ production was mediated through the decreased phosphorylation of transcription factors that positively regulate IFN-γ expression. Cigarette smoke exposure increased the bacterial burden in mice infected with M. tuberculosis and increased weight loss and mortality in mice infected with influenza virus. This study provides the first demonstration that cigarette smoke exposure directly inhibits the pulmonary T-cell response to M. tuberculosis and influenza virus in a physiologically relevant animal model, increasing susceptibility to both pathogens.
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Affiliation(s)
- Yan Feng
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
| | - Ying Kong
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
| | - Peter F. Barnes
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
| | - Fang-Fang Huang
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
| | - Peter Klucar
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
| | - Xisheng Wang
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
| | - Buka Samten
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
| | - Mayami Sengupta
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
| | - Bruce Machona
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
| | - Ruben Donis
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
| | - Amy R. Tvinnereim
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
| | - Homayoun Shams
- Center for Pulmonary and Infectious Disease Control, Departments of Microbiology and Immunology, The University of Texas Health Science Center at Tyler, Tyler, Texas 75708, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333
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Porra L, Peták F, Strengell S, Neitola K, Janosi TZ, Suhonen H, Suortti P, Sovijärvi ARA, Habre W, Bayat S. Acute cigarette smoke inhalation blunts lung responsiveness to methacholine and allergen in rabbit: differentiation of central and peripheral effects. Am J Physiol Lung Cell Mol Physiol 2010; 299:L242-51. [DOI: 10.1152/ajplung.00033.2010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Despite the prevalence of active smoking in asthmatics, data on the short-term effect of acute mainstream tobacco smoke exposure on airway responsiveness are very scarce. The aim of this study was to assess the immediate effect of acute exposure to mainstream cigarette smoke on airway reactivity to subsequent nonspecific and allergenic challenges in healthy control ( n = 5) and ovalbumin-sensitized rabbits ( n = 6). We combined low-frequency forced oscillations and synchrotron radiation CT imaging to differentiate central airway and peripheral airway and lung parenchymal components of the response to airway provocation. Acute exposure to smoke generated by four successive cigarettes (CS) strongly inhibited the central airway response to subsequent IV methacholine (MCh) challenge. In the sensitized animals, although the response to ovalbumin was also inhibited in the central airways, mainstream CS did not blunt the peripheral airway response in this group. In additional groups of experiments, exposure to HEPA-filtered CS ( n = 6) similarly inhibited the MCh response, whereas CO (10,000 ppm for 4 min, n = 6) or nitric oxide inhalation instead of CS (240 ppm, 4 × 7 min, n = 5) failed to blunt nonspecific airway responsiveness. Pretreatment with α-chymotrypsin to inhibit endogenous VIP before CS exposure had no effect ( n = 4). Based on these observations, the gas phase of mainstream cigarette smoke may contain one or more short-term inhibitory components acting primarily on central airways and inhibiting the response to both specific and nonspecific airway provocation, but not on the lung periphery where both lung mechanical parameters, and synchrotron-imaging derived parameters, showed large changes in response to allergen challenge in sensitized animals.
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Affiliation(s)
- Liisa Porra
- European Synchrotron Radiation Facility, Grenoble, France
- Department of Physics, University of Helsinki, Helsinki, Finland
| | - Ferenc Peták
- Department of Medical Informatics and Engineering, University of Szeged, Szeged, Hungary
| | - Satu Strengell
- Department of Physics, University of Helsinki, Helsinki, Finland
- Department of Clinical Physiology and Nuclear Medicine, Helsinki University Central Hospital, Helsinki, Finland
| | - Kimmo Neitola
- Department of Physics, University of Helsinki, Helsinki, Finland
| | - Tibor Z. Janosi
- Department of Medical Informatics and Engineering, University of Szeged, Szeged, Hungary
| | - Heikki Suhonen
- European Synchrotron Radiation Facility, Grenoble, France
| | - Pekka Suortti
- Department of Physics, University of Helsinki, Helsinki, Finland
| | - Anssi R. A. Sovijärvi
- Department of Clinical Physiology and Nuclear Medicine, Helsinki University Central Hospital, Helsinki, Finland
| | - Walid Habre
- Geneva Children's Hospital, University Hospitals of Geneva and Geneva University, Geneva, Switzerland; and
| | - Sam Bayat
- Université de Picardie Jules Verne, EA4285 Péritox UMI01 INERIS and Department of Pediatric Cardiology and Pulomonary Medicine, CHU Amiens, Amiens, France
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21
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Maes T, Provoost S, Lanckacker EA, Cataldo DD, Vanoirbeek JAJ, Nemery B, Tournoy KG, Joos GF. Mouse models to unravel the role of inhaled pollutants on allergic sensitization and airway inflammation. Respir Res 2010; 11:7. [PMID: 20092634 PMCID: PMC2831838 DOI: 10.1186/1465-9921-11-7] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2009] [Accepted: 01/21/2010] [Indexed: 02/06/2023] Open
Abstract
Air pollutant exposure has been linked to a rise in wheezing illnesses. Clinical data highlight that exposure to mainstream tobacco smoke (MS) and environmental tobacco smoke (ETS) as well as exposure to diesel exhaust particles (DEP) could promote allergic sensitization or aggravate symptoms of asthma, suggesting a role for these inhaled pollutants in the pathogenesis of asthma. Mouse models are a valuable tool to study the potential effects of these pollutants in the pathogenesis of asthma, with the opportunity to investigate their impact during processes leading to sensitization, acute inflammation and chronic disease. Mice allow us to perform mechanistic studies and to evaluate the importance of specific cell types in asthma pathogenesis. In this review, the major clinical effects of tobacco smoke and diesel exhaust exposure regarding to asthma development and progression are described. Clinical data are compared with findings from murine models of asthma and inhalable pollutant exposure. Moreover, the potential mechanisms by which both pollutants could aggravate asthma are discussed.
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Affiliation(s)
- Tania Maes
- Laboratory for Translational Research in Obstructive Pulmonary Diseases, Department of Respiratory Medicine, Ghent University Hospital, De Pintelaan 185, 9000 Ghent, Belgium.
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22
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Song DJ. Environmental tobacco smoke and childhood asthma. KOREAN JOURNAL OF PEDIATRICS 2010. [DOI: 10.3345/kjp.2010.53.2.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Dae Jin Song
- Department of Pediatrics, College of Medicine, Korea University, Seoul, Korea
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23
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Broekema M, ten Hacken NHT, Volbeda F, Lodewijk ME, Hylkema MN, Postma DS, Timens W. Airway epithelial changes in smokers but not in ex-smokers with asthma. Am J Respir Crit Care Med 2009; 180:1170-8. [PMID: 19797761 DOI: 10.1164/rccm.200906-0828oc] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE Smoking has detrimental effects on asthma outcome, such as increased cough, wheezing, sputum production, and frequency of asthma attacks. This results in accelerated lung function decline. The underlying pathological process of smoke-induced deterioration of asthma is unknown. OBJECTIVES To compare bronchial inflammation and remodeling in never-smokers, ex-smokers, and current smokers with asthma. METHODS A total of 147 patients with asthma (66 never-smokers, 46 ex-smokers, and 35 current smokers) were investigated. MEASUREMENTS AND MAIN RESULTS Lung function, exhaled nitric oxide levels, and symptom questionnaires were assessed, and induced sputum and bronchial biopsies were obtained for determination of airway inflammation and remodeling. Smokers with asthma had lower FEV(1) and alveolar and bronchial nitric oxide levels than never-smokers. Smokers also had more goblet cells and mucus-positive epithelium, increased epithelial thickness, and a higher proliferation rate of intact and basal epithelium than ex-smokers and never-smokers. Smokers had higher numbers of mast cells and lower numbers of eosinophils than never-smokers. Ex-smokers had similar goblet cell numbers and mucus-positive epithelium, epithelial thickness, epithelial proliferation rate, and mast cell numbers as never-smokers. CONCLUSIONS Smokers with asthma have epithelial changes that are associated with increased asthma symptoms, such as shortness of breath and phlegm production. The fact that epithelial characteristics in ex-smokers are similar to those in never-smokers suggests that the smoke-induced changes can be reversed by smoking cessation.
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Affiliation(s)
- Martine Broekema
- Dept. of Pathology, University Medical Center Groningen, PO Box 30001, 9700 RB Groningen, The Netherlands.
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Robays LJ, Lanckacker EA, Moerloose KB, Maes T, Bracke KR, Brusselle GG, Joos GF, Vermaelen KY. Concomitant inhalation of cigarette smoke and aerosolized protein activates airway dendritic cells and induces allergic airway inflammation in a TLR-independent way. THE JOURNAL OF IMMUNOLOGY 2009; 183:2758-66. [PMID: 19635922 DOI: 10.4049/jimmunol.0802204] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Cigarette smoking is associated with the development of allergic asthma. In mice, exposure to cigarette smoke sensitizes the airways toward coinhaled OVA, leading to OVA-specific allergic inflammation. Pulmonary dendritic cells (DCs) are professional APCs involved in immunosurveillance and implicated in the induction of allergic responses in lung. We investigated the effects of smoking on some of the key features of pulmonary DC biology, including trafficking dynamics and cellular activation status in different lung compartments. We found that cigarette smoke inhalation greatly amplified DC-mediated transport of inhaled Ags to mediastinal lymph nodes, a finding supported by the up-regulation of CCR7 on airway DCs. Pulmonary plasmacytoid DCs, which have been involved in inhalational tolerance, were reduced in number after smoke exposure. In addition, combined exposure to cigarette smoke and OVA aerosol increased surface expression of MHC class II, CD86, and PDL2 on airway DCs, while ICOSL was strongly down-regulated. Although inhaled endotoxins, which are also present in cigarette smoke, have been shown to act as DC activators and Th2-skewing sensitizers, TLR4-deficient and MyD88 knockout mice did not show impaired eosinophilic airway inflammation after concomitant exposure to cigarette smoke and OVA. From these data, we conclude that cigarette smoke activates the pulmonary DC network in a pattern that favors allergic airway sensitization toward coinhaled inert protein. The TLR independency of this phenomenon suggests that alternative immunological adjuvants are present in cigarette smoke.
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Affiliation(s)
- Lander J Robays
- Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
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Botelho FM, Gaschler GJ, Kianpour S, Zavitz CCJ, Trimble NJ, Nikota JK, Bauer CMT, Stämpfli MR. Innate immune processes are sufficient for driving cigarette smoke-induced inflammation in mice. Am J Respir Cell Mol Biol 2009; 42:394-403. [PMID: 19502389 DOI: 10.1165/rcmb.2008-0301oc] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The objective of this study was to characterize the impact of cigarette smoke exposure on lung immune and inflammatory processes. BALB/c and C57BL/6 mice were exposed to cigarette smoke for 4 days (acute) or at least 5 weeks (prolonged). Both mouse strains manifested an inflammatory response after acute smoke exposure, characterized by an influx of neutrophils and mononuclear cells. Multiplex analysis revealed a greater than twofold increase of the cytokines IL-1alpha, -5, -6, and -18, as well as the chemokines monocyte chemotactic protein-1 and -3, macrophage inflammatory protein-1alpha, -beta, and -gamma, -2, -3beta, macrophage defined chemokine, granulocyte chemotactic protein-2, and interferon-gamma-inducible protein-10. In BALB/c mice, neutrophilia persisted after prolonged exposure, whereas C57BL/6 showed evidence of attenuated neutrophilia both in the bronchoalveolar lavage and the lungs. In both mouse strains, cigarette smoke exposure was associated with an expansion of mature (CD11c(hi)/major histocompatibility complex class II(hi)) myeloid dendritic cells; we observed no changes in plasmacytoid dendritic cells. Lymphocytes in the lungs displayed an activated phenotype that persisted for CD4 T cells only after prolonged exposure. In BALB/c mice, T cells acquired T helper (Th) 1 and Th2 effector function after 5 weeks of smoke exposure, whereas, in C57BL/6 mice, neither Th1 nor Th2 cells were detected. In both mouse strains, cigarette smoke exposure led to an accumulation of FoxP3+ T regulatory cells in the lungs. Studies in RAG1 knockout mice suggest that these regulatory cells may participate in controlling smoke-induced inflammation. Acute and prolonged cigarette smoke exposure was associated with inflammation, activation of the adaptive immune system, and expansion of T regulatory cells in the lungs.
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Affiliation(s)
- Fernando M Botelho
- Department of Pathology and Molecular Medicine, McMaster University, 1200 Main Street West Hamilton, ON L8N3Z5, Canada
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Stämpfli MR, Anderson GP. How cigarette smoke skews immune responses to promote infection, lung disease and cancer. Nat Rev Immunol 2009; 9:377-84. [PMID: 19330016 DOI: 10.1038/nri2530] [Citation(s) in RCA: 466] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A complex and multilayered immune defence system protects the host against harmful agents and maintains tissue homeostasis. Cigarette smoke exposure markedly impacts the immune system, compromising the host's ability to mount appropriate immune and inflammatory responses and contributing to smoking-related pathologies. These adverse effects on the immune system not only occur in active smokers, but also in those exposed to smoke passively in contaminated environments, and may persist for decades after exposure has ended.
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Affiliation(s)
- Martin R Stämpfli
- Department of Pathology and Molecular Medicine, Centre for Gene Therapeutics, McMaster University, Hamilton, Ontario, Canada.
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Robays LJ, Maes T, Joos GF, Vermaelen KY. Between a cough and a wheeze: dendritic cells at the nexus of tobacco smoke-induced allergic airway sensitization. Mucosal Immunol 2009; 2:206-19. [PMID: 19262504 DOI: 10.1038/mi.2009.7] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Exposure to cigarette smoke represents a major risk factor for the development of asthma. Enhanced sensitization toward allergens has been observed in humans and laboratory animals exposed to cigarette smoke. Pulmonary dendritic cells (DCs) are crucially involved in sensitization toward allergens and play an important role in the development of T helper (Th)2-mediated allergic airway inflammation. We propose the concept that aberrant DC activation forms the basis for the deviation of the lung's default tolerogenic response toward allergic inflammation when harmless antigens are concomittantly inhaled with tobacco smoke. This review will summarize evidence suggesting that tobacco smoke can achieve this effect by providing numerous triggers of innate immunity, which can profoundly modulate airway DC biology. Tobacco smoke can affect the airway DC network either directly or indirectly by causing the release of DC-targeted mediators from the pulmonary tissue environment, resulting in the induction of a Th2-oriented pathological immune response. A thorough knowledge of the molecular pathways involved may open the door to novel approaches in the treatment of asthma.
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Affiliation(s)
- L J Robays
- Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
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28
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Trimble NJ, Botelho FM, Bauer CMT, Fattouh R, Stämpfli MR. Adjuvant and anti-inflammatory properties of cigarette smoke in murine allergic airway inflammation. Am J Respir Cell Mol Biol 2009; 40:38-46. [PMID: 18635815 DOI: 10.1165/rcmb.2008-0107oc] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The impact of cigarette smoke on allergic asthma remains controversial both clinically and experimentally. The objective of this study was to investigate, in a murine model, how cigarette smoke affects immune inflammatory processes elicited by a surrogate allergen. In our experimental design, mice were concurrently exposed to cigarette smoke and ovalbumin (OVA), an innocuous antigen that, unless introduced in the context of an adjuvant, induces inhalation tolerance. We show that cigarette smoke exposure has adjuvant properties, allowing for allergic mucosal sensitization to OVA. Specifically, concurrent exposure to cigarette smoke and OVA for 2 weeks led to airway eosinophilia and goblet cell hyperplasia. In vivo OVA recall challenge 1 month after the last smoke exposure showed that concurrent exposure to OVA and cigarette smoke induced antigen-specific memory. Robust eosinophilia and OVA-specific IgG1 and IgE characterized the ensuing inflammatory response. Mechanistically, allergic sensitization was, in part, granulocyte macrophage colony-stimulating factor (GM-CSF) dependent, as a significant reduction in BAL eosinophilia was observed in mice treated with an anti-GM-CSF antibody. Of note, continuous smoke exposure attenuated the OVA recall response; decreased airway eosinophilia was observed in mice continuously exposed to cigarette smoke compared with mice that ceased the smoke exposure protocol. In conclusion, we demonstrate experimentally that while cigarette smoke acts as an adjuvant allowing for allergic sensitization, it also attenuates the ensuing eosinophilic inflammatory response.
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Affiliation(s)
- Nancy J Trimble
- Medical Sciences Program, McMaster University, Hamilton, ON, L8N 3Z5, Canada
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29
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Joad JP, Kott KS, Bric JM, Peake JL, Pinkerton KE. Effect of perinatal secondhand tobacco smoke exposure on in vivo and intrinsic airway structure/function in non-human primates. Toxicol Appl Pharmacol 2008; 234:339-44. [PMID: 19084550 DOI: 10.1016/j.taap.2008.10.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Accepted: 10/30/2008] [Indexed: 10/21/2022]
Abstract
Infants exposed to second hand smoke (SHS) experience more problems with wheezing. This study was designed to determine if perinatal SHS exposure increases intrinsic and/or in vivo airway responsiveness to methacholine and whether potential structural/cellular alterations in the airway might explain the change in responsiveness. Pregnant rhesus monkeys were exposed to filtered air (FA) or SHS (1 mg/m(3) total suspended particulates) for 6 h/day, 5 days/week starting at 50 days gestational age. The mother/infant pairs continued the SHS exposures postnatally. At 3 months of age each infant: 1) had in vivo lung function measurements in response to inhaled methacholine, or 2) the right accessory lobe filled with agarose, precision-cut to 600 mum slices, and bathed in increasing concentrations of methacholine. The lumenal area of the central airway was determined using videomicrometry followed by fixation and histology with morphometry. In vivo tests showed that perinatal SHS increases baseline respiratory rate and decreases responsiveness to methacholine. Perinatal SHS did not alter intrinsic airway responsiveness in the bronchi. However in respiratory bronchioles, SHS exposure increased airway responsiveness at lower methacholine concentrations but decreased it at higher concentrations. Perinatal SHS did not change eosinophil profiles, epithelial volume, smooth muscle volume, or mucin volume. However it did increase the number of alveolar attachments in bronchi and respiratory bronchioles. In general, as mucin increased, airway responsiveness decreased. We conclude that perinatal SHS exposure alters in vivo and intrinsic airway responsiveness, and alveolar attachments.
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Affiliation(s)
- Jesse P Joad
- Department of Pediatrics, School of Medicine; University of California at Davis, Davis, California, 95616, USA.
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30
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Thatcher TH, Benson RP, Phipps RP, Sime PJ. High-dose but not low-dose mainstream cigarette smoke suppresses allergic airway inflammation by inhibiting T cell function. Am J Physiol Lung Cell Mol Physiol 2008; 295:L412-21. [PMID: 18567739 DOI: 10.1152/ajplung.00392.2007] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Epidemiological studies have identified childhood exposure to environmental tobacco smoke as a significant risk factor for the onset and exacerbation of asthma, but studies of smoking in adults are less conclusive, and mainstream cigarette smoke (MCS) has been reported to both enhance and attenuate allergic airway inflammation in animal models. We sensitized mice to ovalbumin (OVA) and exposed them to MCS in a well-characterized exposure system. Exposure to MCS (600 mg/m(3) total suspended particulates, TSP) for 1 h/day suppresses the allergic airway response, with reductions in eosinophilia, tissue inflammation, goblet cell metaplasia, IL-4 and IL-5 in bronchoalveolar lavage (BAL) fluid, and OVA-specific antibodies. Suppression is associated with a loss of antigen-specific proliferation and cytokine production by T cells. However, exposure to a lower dose of MCS (77 mg/m(3) TSP) had no effect on the number of BAL eosinophils or OVA-specific antibodies. This is the first report to demonstrate, using identical smoking methodologies, that MCS inhibits immune responses in a dose-dependent manner and may explain the observation that, although smoking provokes a systemic inflammatory response, it also inhibits T cell-mediated responses involved in a number of diseases.
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Affiliation(s)
- Thomas H Thatcher
- Department of Medicine, Univ. of Rochester, Rochester, NY 14642, USA
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Van Hove CL, Moerloose K, Maes T, Joos GF, Tournoy KG. Cigarette smoke enhances Th-2 driven airway inflammation and delays inhalational tolerance. Respir Res 2008; 9:42. [PMID: 18489797 PMCID: PMC2408577 DOI: 10.1186/1465-9921-9-42] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2008] [Accepted: 05/20/2008] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Active smoking increases asthma severity and is related to diminished treatment efficacy. Animal models in which inhalation of both allergen and mainstream cigarette smoke are combined can help us to understand the complex interaction between both agents. We have recently shown that, in allergic mice, the airway inflammation can be cleared by repeated allergen challenge, resulting in the establishment of a state of inhalational tolerance. METHODS In this study, we assessed in vivo the impact of cigarette smoke on the efficacy and time course of this form of tolerance induction. We exposed sensitized mice to concurrent mainstream cigarette smoke and allergen (Ovalbumin- OVA) and measured the airway inflammation at different time points. RESULTS We first confirmed that aerosolized OVA administered for a prolonged time period (4-8 weeks) resulted in the establishment of tolerance. Concurrent OVA and smoke exposure for 2 weeks showed that tobacco smoke enhanced the Th-2 driven airway inflammation in the acute phase. In addition, the induction of the tolerance by repeated inhalational OVA challenge was delayed significantly by the tobacco smoke, since 4 weeks of concurrent exposure resulted in a more persistent eosinophilic airway inflammation, paralleled by a more mature dendritic cell phenotype. However, smoke exposure could not prevent the establishment of tolerance after 8 weeks of antigen exposure as shown by both histopathology (disappearance of the Th-2 driven inflammation) and by in vivo functional experiments. In these tolerized mice, some of the inflammatory responses to the smoke were even attenuated. CONCLUSION Cigarette smoke enhances acute allergic inflammation and delays, but does not abrogate the development of tolerance due to prolonged challenge with inhaled antigen in experimental asthma.
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Affiliation(s)
- Chris L Van Hove
- Department of Respiratory Diseases, Ghent University, Ghent, Belgium
| | - Katrien Moerloose
- Department of Respiratory Diseases, Ghent University, Ghent, Belgium
| | - Tania Maes
- Department of Respiratory Diseases, Ghent University, Ghent, Belgium
| | - Guy F Joos
- Department of Respiratory Diseases, Ghent University, Ghent, Belgium
| | - Kurt G Tournoy
- Department of Respiratory Diseases, Ghent University, Ghent, Belgium
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Yao H, Edirisinghe I, Yang SR, Rajendrasozhan S, Kode A, Caito S, Adenuga D, Rahman I. Genetic ablation of NADPH oxidase enhances susceptibility to cigarette smoke-induced lung inflammation and emphysema in mice. THE AMERICAN JOURNAL OF PATHOLOGY 2008; 172:1222-37. [PMID: 18403597 PMCID: PMC2329832 DOI: 10.2353/ajpath.2008.070765] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/12/2008] [Indexed: 11/20/2022]
Abstract
Cigarette smoke (CS) induces recruitment of inflammatory cells in the lungs leading to the generation of reactive oxygen species (ROS), which are involved in lung inflammation and injury. Nicotinamide adenine dinucleotide phosphate (NADPH) oxidase is a multimeric system that is responsible for ROS production in mammalian cells. We hypothesized that NADPH oxidase-derived ROS play an important role in lung inflammation and injury and that targeted ablation of components of NADPH oxidase (p47(phox) and gp91(phox)) would protect lungs against the detrimental effects of CS. To test this hypothesis, we exposed p47(phox-/-) and gp91(phox-/-) mice to CS and examined inflammatory response and injury in the lung. Surprisingly, although CS-induced ROS production was decreased in the lungs of p47(phox-/-) and gp91(phox-/-) mice compared with wild-type mice, the inflammatory response was significantly increased and was accompanied by development of distal airspace enlargement and alveolar destruction. This pathological abnormality was associated with enhanced activation of the TLR4-nuclear factor-kappaB pathway in response to CS exposure in p47(phox-/-) and gp91(phox-/-) mice. This phenomenon was confirmed by in vitro studies in which treatment of peritoneal macrophages with a nuclear factor-kappaB inhibitor reversed the CS-induced release of proinflammatory mediators. Thus, these data suggest that genetic ablation of components of NADPH oxidase enhances susceptibility to the proinflammatory effects of CS leading to airspace enlargement and alveolar damage.
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Affiliation(s)
- Hongwei Yao
- Department of Environmental Medicine, Lung Biology and Disease Program, University of Rochester Medical Center, Box 850, 601 Elmwood Ave., Rochester, NY 14642, USA
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Zavitz CCJ, Gaschler GJ, Robbins CS, Botelho FM, Cox PG, Stampfli MR. Impact of cigarette smoke on T and B cell responsiveness. Cell Immunol 2008; 253:38-44. [PMID: 18533139 DOI: 10.1016/j.cellimm.2008.04.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2008] [Revised: 04/17/2008] [Accepted: 04/23/2008] [Indexed: 11/25/2022]
Abstract
Although its direct effects cannot be discounted, tobacco's effects on the immune system have been proposed to play a key role in mediating its deleterious health impact. Studies in rats using high levels of smoke exposure have suggested that tobacco smoke exhausts cellular signal transduction cascades, making lymphocytes unresponsive to stimulation. In the present study, we show that purified B or T cells, and total lymphocytes from the lungs, lymph nodes and spleens of smoke-exposed mice fluxed calcium, proliferated, and secreted immunoglobulin or IFN-gamma similarly to control mice when stimulated with ligands including anti-IgM, and anti-CD3. Importantly, we recapitulated these findings in PBMCs from human smokers; cells from long-term smokers and never-smokers proliferated equivalently when stimulated ex vivo. Previous reports of lymphocyte unresponsiveness in rats are inconsistent with these findings, and may reflect a phenomenon observed only at levels of smoke exposure well above those seen in actual human smokers.
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Affiliation(s)
- Caleb C J Zavitz
- Department of Pathology and Molecular Medicine, Centre for Gene Therapeutics, McMaster University, 1200 Main Street West, Hamilton, Ont., Canada L8N 3Z5
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Bergren DR. Tobacco smoke is an adjuvant for maintained airway sensitization in guinea pigs. J Asthma 2007; 44:723-8. [PMID: 17994401 DOI: 10.1080/02770900701595642] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Tobacco smoke (TS) exposure exacerbates asthma and may induce airway hyperresponsiveness in asymptomatic individuals. We hypothesized that TS exposure is an adjuvant to airway responsiveness. Ovalbumin (OA) sensitized guinea pigs were TS or air exposed. At 30 exposure days OA airway responsiveness was demonstrable in OA-treated animals exposed to either TS or air. After 130 exposure days only TS-exposed guinea pigs demonstrated OA airway responsiveness. Capsaicin airway responsiveness developed in non-sensitized and OA-sensitized guinea pigs exposed to TS. Therefore TS-exposure acts as an adjuvant to antigenic and neurogenic airway responsiveness. Combined antigen and adjuvant avoidance may attenuate or reverse airway responsiveness.
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Affiliation(s)
- Dale R Bergren
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, Nebraska 68178, USA.
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Van de Ven MOM, Engels RCME, Kerstjens HAM, Van den Eijnden RJJM. Bidirectionality in the relationship between asthma and smoking in adolescents: a population-based cohort study. J Adolesc Health 2007; 41:444-54. [PMID: 17950164 DOI: 10.1016/j.jadohealth.2007.05.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2007] [Revised: 05/09/2007] [Accepted: 05/17/2007] [Indexed: 11/29/2022]
Abstract
PURPOSE Several cross-sectional studies have showed higher smoking rates among adolescents with asthma, but hardly any study has investigated this relation longitudinally. This study examines whether these cross-sectional results are caused by higher smoking onset among adolescents with asthma, or by the development of asthma after smoking onset. METHODS This was a longitudinal study (22 months) among 7,426 Dutch adolescents (mean age at baseline = 12.9 years). Asthma was assessed with self-report questionnaires of the International Study of Asthma and Allergies in Childhood (ISAAC) and the student questionnaire of the American College of Allergy, Asthma and Immunology. Adolescents' smoking and parental smoking were also assessed by adolescent-report. All analyses were controlled for age, gender, education, ethnicity, and parental smoking. RESULTS In baseline non-smokers, adolescents with current diagnosed asthma and with more severe asthma had an increased risk to become regular smokers. Among girls and adolescents with a smoking mother, having asthma symptoms was a risk factor for starting experimental smoking. In contrast, among boys and adolescents with a non-smoking mother, having asthma symptoms was protective for experimental smoking. With regard to the effect of smoking on asthma, adolescent smoking predicted a higher incidence of asthma symptoms. In addition, smoking predicted increased symptom severity scores, and this effect was stronger in girls. Adolescent smoking was a stronger predictor for the development of asthma symptoms when the mother smoked. CONCLUSIONS The relationship between asthma and smoking in adolescence seems to be bidirectional, with relations in both directions being stronger in females and when the mother smokes.
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Melgert BN, Timens W, Kerstjens HA, Geerlings M, Luinge MA, Schouten JP, Postma DS, Hylkema MN. Effects of 4 months of smoking in mice with ovalbumin-induced airway inflammation. Clin Exp Allergy 2007; 37:1798-808. [PMID: 17941917 DOI: 10.1111/j.1365-2222.2007.02843.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
BACKGROUND The effects of smoking on asthma pathogenesis are complex and not well studied. We have shown recently that 3 weeks of smoking attenuates ovalbumin (OVA)-induced airway inflammation in mice and that 4-6 months of smoking induces emphysema in mice without airway inflammation. Effects of combined long-term smoking and OVA exposure have not been investigated so far. OBJECTIVE To study whether long-term smoking affects progression of allergic airway inflammation and/or enhances the development of emphysema in mice. METHODS Mice were sensitized to OVA and challenged with saline or OVA aerosols for 6 months. From 2 months onwards, mice were also exposed to air or smoke. Lung tissue was analysed for extent of inflammation, emphysema, remodelling and for cytokine levels, and serum for OVA-specific IgE levels. RESULTS Chronic OVA exposure of 6 months resulted in a T helper type 2 (Th2)-type inflammation with increased levels of IL-4, IL-5, IL-6 and infiltration of eosinophils, CD4(+) T cells, macrophages and plasma cells. Smoking induced a Th17-type of airway inflammation, characterized by neutrophils, macrophages, B cells and increased levels of IL-17, IL-6, granulocyte-macrophage colony-stimulating factor, granulocyte colony-stimulating factor and monocyte chemoattractant protein-1. Concomittant smoking and OVA exposure resulted in inflammation similar to OVA exposure alone. OVA exposure increased IgE levels compared with saline exposure, and smoking did not further increase these levels. CONCLUSION We did not find evidence for increased inflammation, IgE levels or emphysema in mice with allergic airway inflammation after 4 months of smoking compared with non-smoking. However, a 4-month exposure to smoke alone did enhance neutrophilic airway inflammation characterized by high pulmonary IL-17 levels. A Th2 inflammatory environment due to OVA exposure may be one explanation as to why no further detrimental effects of smoking on allergic airway inflammation were found.
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Affiliation(s)
- B N Melgert
- Department of Pathology and Laboratory Medicine, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands.
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Gohil K, Oommen S, Vasu VT, Aung HH, Cross CE. Tocopherol transfer protein deficiency modifies nuclear receptor transcriptional networks in lungs: Modulation by cigarette smoke in vivo. Mol Aspects Med 2007; 28:453-80. [PMID: 17400288 DOI: 10.1016/j.mam.2007.02.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2007] [Revised: 02/12/2007] [Accepted: 02/13/2007] [Indexed: 11/23/2022]
Abstract
Dietary factors and environmental pollutants initiate signaling cascades that converge on AhR:Nrf2:NF-kappaB transcription factor (TF) networks and, in turn, affect the health of the organism through its effects on the expression of numerous genes. Reactive oxygen metabolites (ROMs) have been hypothesized to be common mediators in these pathways. alpha-Tocopherol (AT) is a potent, lipophilic, scavenger of ROMs in vitro and has been hypothesized to be a major chain-breaking anti-oxidant in lipoproteins and biological membranes in vivo. The lung offers a vital organ to test the various postulated actions of AT in vivo. Lung AT concentrations can be manipulated by several methods that include dietary and genetic techniques. In this study we have used mice with severe AT deficiency inflicted at birth by the deletion of AT transfer protein (ATTP) which is abundantly expressed in the liver and regulates systemic concentrations of AT. Mice and humans deficient in ATTP are AT deficient. Female ATTP-deficient (ATTP-KO) mice and their congenic ATTP normal (WT) mice fed a diet containing 35 IU AT/kg diet were used to test our hypothesis. The mice (n=5/group) were exposed to either air or cigarette smoke (CS, total suspended particles 60 mg/m(3), 6h/day), a source of ROM, for 3 or 10 days. Post-exposure lung tissue was dissected, RNA extracted from each lung and it was pooled group-wise and processed for GeneChip analysis (Affymetrix 430A 2.0). Differential analysis of the transcriptomes ( approximately 16,000 mRNAs) identified CS sensitive genes that were modulated by lung AT-concentration. CS activated AhR driven genes such as cyp1b1 whose induction was augmented in CS-exposed, AT-deficient lungs. However, CS-induced expression of some of the Nrf2 driven genes was not potentiated in the AT-deficient lungs. Largest clusters of CS-AT sensitive genes were lymphocyte and leukocyte specific genes. These gene-clusters included those encoding cytokines and immunoglobulins, which were repressed by CS and were modulated by lung AT concentrations. Our genome-wide analysis suggests reciprocal regulation of xenobiotic and immune response genes by CS and a modulatory role of lung AT concentration on the expression of these clusters of genes. These data suggest that in vivo network of AT, AT-metabolites and ATTP affects the transcription of genes driven by AhR, Nrf2 and NF-kappaB, transcription factor networks that transduce cellular metabolic signals and orchestrate adaptive responses of lungs to inhaled environmental pollutants.
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Affiliation(s)
- K Gohil
- Pulmonary and Critical Care Medicine, Genome and Biomedical Sciences Facility, 451 East Health Sciences Drive, University of California, Davis, CA 95616, USA.
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Min MG, Song DJ, Miller M, Cho JY, McElwain S, Ferguson P, Broide DH. Coexposure to environmental tobacco smoke increases levels of allergen-induced airway remodeling in mice. THE JOURNAL OF IMMUNOLOGY 2007; 178:5321-8. [PMID: 17404317 DOI: 10.4049/jimmunol.178.8.5321] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Environmental tobacco smoke (ETS) can increase asthma symptoms and the frequency of asthma attacks. However, the contribution of ETS to airway remodeling in asthma is at present unknown. In this study, we have used a mouse model of allergen-induced airway remodeling to determine whether the combination of chronic exposure to ETS and chronic exposure to OVA allergen induces greater levels of airway remodeling than exposure to either chronic ETS or chronic OVA allergen alone. Mice exposed to chronic ETS alone did not develop significant eosinophilic airway inflammation, airway remodeling, or increased airway hyperreactivity to methacholine. In contrast, mice exposed to chronic OVA allergen had significantly increased levels of peribronchial fibrosis, increased thickening of the smooth muscle layer, increased mucus, and increased airway hyperreactivity which was significantly enhanced by coexposure to the combination of chronic ETS and chronic OVA allergen. Mice coexposed to chronic ETS and chronic OVA allergen had significantly increased levels of eotaxin-1 expression in airway epithelium which was associated with increased numbers of peribronchial eosinophils, as well as increased numbers of peribronchial cells expressing TGF-beta1. These studies suggest that chronic coexposure to ETS significantly increases levels of allergen-induced airway remodeling (in particular smooth muscle thickness) and airway responsiveness by up-regulating expression of chemokines such as eotaxin-1 in airway epithelium with resultant recruitment of cells expressing TGF-beta1 to the airway and enhanced airway remodeling.
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Affiliation(s)
- Myung Goo Min
- Department of Medicine, University of California-San Diego, La Jolla, CA 92093, USA
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Penn AL, Rouse RL, Horohov DW, Kearney MT, Paulsen DB, Lomax L. In utero exposure to environmental tobacco smoke potentiates adult responses to allergen in BALB/c mice. ENVIRONMENTAL HEALTH PERSPECTIVES 2007; 115:548-55. [PMID: 17450223 PMCID: PMC1852677 DOI: 10.1289/ehp.9780] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2006] [Accepted: 01/04/2007] [Indexed: 05/15/2023]
Abstract
BACKGROUND Fetal stress has been linked to adult atherosclerosis, obesity, and diabetes. Epidemiology studies have associated fetal exposure to maternal smoking and postnatal exposure to environmental tobacco smoke (ETS) with increased asthma risk. OBJECTIVE We tested the hypothesis, in a mouse model of asthma, that in utero ETS exposure alters airway function and respiratory immune responses in adults. METHODS Pregnant Balb/c mice were exposed daily to ETS or HEPA-filtered air (AIR). Offspring inhaled aerosolized ovalbumin (OVA) or saline in weeks 7-8. Regardless of whether they inhaled OVA or saline, mice were sensitized by OVA injections in weeks 11 and 13 followed by OVA aerosol challenge in weeks 14-15. At three time points, we assessed OVA-specific serum immunoglobins, bronchoalveolar lavage cells and cytokines, lung and nasal histopathology, and airway hyperresponsiveness (AHR). RESULTS At 6 weeks, we found no significant differences between in utero ETS and AIR mice. At 10 weeks, following OVA aerosol, ETS mice displayed greater AHR than AIR mice (alpha = 0.05), unaccompanied by changes in histopathology, cytokine profile, or antibody levels. At 15 weeks, mice that had inhaled saline in weeks 7-8 developed airway inflammation: eosinophilia (alpha = 0.05), interleukin-5 (alpha = 0.05), and AHR (alpha = 0.05) were greater in ETS mice than in AIR mice. Mice that had inhaled OVA in weeks 7-8 demonstrated no airway inflammation after sensitization and challenge. CONCLUSION In utero ETS exposure exacerbates subsequent adult responses to initial allergen exposure.
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Affiliation(s)
- Arthur L Penn
- Department of Comparative Biomedical Sciences, Louisiana State University School of Veterinary Medicine, Baton Rouge, LA 70803, USA.
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Sarkar P, Hayes BE. Induction of COX-2 by acrolein in rat lung epithelial cells. Mol Cell Biochem 2007; 301:191-9. [PMID: 17318410 DOI: 10.1007/s11010-007-9411-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2006] [Accepted: 01/12/2007] [Indexed: 11/26/2022]
Abstract
Acrolein is a highly reactive alpha, beta-unsaturated aldehyde, and a product of lipid peroxidation reactions. Acrolein is also an environmental pollutant and a key component of cigarette smoke, and has been implicated in multiple respiratory diseases. Lung tissue is a primary target for acrolein toxicity in smokers and may lead to chronic lung inflammation and lung cancer. Chronic inflammation, associated with expression of cyclooxygenase-2 (COX-2) and prostaglandins, are predisposing factors for malignancy. In this study, we investigated the induction of COX-2 by acrolein in rat lung epithelial cells and its related signaling cascade. Induction of COX-2 by acrolein was significant at 6 h post-treatment and was dependent upon NFkappaB activation. The activation of NFkappaB by acrolein was induced as a result of degradation of IkappaBalpha over the time of treatment. In addition, the upstream signaling cascade involved Raf-1/ERK activation by acrolein in the COX-2 induction and was inhibited by GW5074 (a Ras/Raf-1/ERK inhibitor), thereby providing evidence for the role of this cascade in this process. The results of these studies offer an explanation for the mechanism of COX-2 induction by acrolein in rat lung epithelial cells.
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Affiliation(s)
- Poonam Sarkar
- College of Pharmacy and Health Sciences, Texas Southern University, Houston, TX 77004, USA
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Elliott MK, Sisson JH, West WW, Wyatt TA. Differential in vivo effects of whole cigarette smoke exposure versus cigarette smoke extract on mouse ciliated tracheal epithelium. Exp Lung Res 2006; 32:99-118. [PMID: 16754475 PMCID: PMC2092449 DOI: 10.1080/01902140600710546] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
In this study the authors compared the affect of vapor phase cigarette smoke (CS) versus cigarette smoke extract (CSE) on the lungs and upper airway of C57BL/6 mice. The authors found that CSE treatment significantly increased neutrophil influx (P < .001), baseline ciliary beat frequency (CBF) (P < .05), and protein kinase C activity compared to CS and controls. Isoproterenol increased CBF with CS exposure, but decreased CBF with CSE (P < .01). Isoproterenol increased protein kinase A (PKA) activity in all groups except CSE. CSE exposure induced inflammatory cell bronchiolitis. These data indicate that CSE exposure has differential effects on the lungs and tracheal epithelium compared to CS exposure.
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Affiliation(s)
- Margaret K Elliott
- Pulmonary, Critical Care and Sleep Medicine Section, University of Nebraska Medical Center, Omaha, Nebraska 68198-5300, USA
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Bibliography. Current world literature. Outcome measures. Curr Opin Allergy Clin Immunol 2006; 6:241-4. [PMID: 16670521 DOI: 10.1097/01.all.0000225167.72842.fd] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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