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Otelea MR, Oancea C, Reisz D, Vaida MA, Maftei A, Popescu FG. Club Cells-A Guardian against Occupational Hazards. Biomedicines 2023; 12:78. [PMID: 38255185 PMCID: PMC10813369 DOI: 10.3390/biomedicines12010078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/11/2023] [Accepted: 12/15/2023] [Indexed: 01/24/2024] Open
Abstract
Club cells have a distinct role in the epithelial repair and defense mechanisms of the lung. After exposure to environmental pollutants, during chronic exposure, the secretion of club cells secretory protein (CCSP) decreases. Exposure to occupational hazards certainly has a role in a large number of interstitial lung diseases. According to the American Thoracic Society and the European Respiratory Society, around 40% of the all interstitial lung disease is attributed to occupational hazards. Some of them are very well characterized (pneumoconiosis, hypersensitivity pneumonitis), whereas others are consequences of acute exposure (e.g., paraquat) or persistent exposure (e.g., isocyanate). The category of vapors, gases, dusts, and fumes (VGDF) has been proven to produce subclinical modifications. The inflammation and altered repair process resulting from the exposure to occupational respiratory hazards create vicious loops of cooperation between epithelial cells, mesenchymal cells, innate defense mechanisms, and immune cells. The secretions of club cells modulate the communication between macrophages, epithelial cells, and fibroblasts mitigating the inflammation and/or reducing the fibrotic process. In this review, we describe the mechanisms by which club cells contribute to the development of interstitial lung diseases and the potential role for club cells as biomarkers for occupational-related fibrosis.
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Affiliation(s)
- Marina Ruxandra Otelea
- Clinical Department 5, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania;
| | - Corina Oancea
- Department of Physical Medicine and Rehabilitation, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Daniela Reisz
- Department of Neurology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania;
| | - Monica Adriana Vaida
- Department of Anatomy and Embryology, “Victor Babeş” University of Medicine and Pharmacy, 300041 Timișoara, Romania;
| | - Andreea Maftei
- Doctoral School, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania;
| | - Florina Georgeta Popescu
- Department of Occupational Health, “Victor Babeş” University of Medicine and Pharmacy, 300041 Timișoara, Romania;
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2
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Johnston RA, Atkins CL, Siddiqui SR, Jackson WT, Mitchell NC, Spencer CY, Pilkington AW, Kashon ML, Haque IU. Interleukin-11 receptor subunit α-1 is required for maximal airway responsiveness to methacholine after acute exposure to ozone. Am J Physiol Regul Integr Comp Physiol 2022; 323:R921-R934. [PMID: 36283092 PMCID: PMC9722265 DOI: 10.1152/ajpregu.00213.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 10/24/2022] [Accepted: 10/24/2022] [Indexed: 11/22/2022]
Abstract
Interleukin (IL)-11, a multifunctional cytokine, contributes to numerous biological processes, including adipogenesis, hematopoiesis, and inflammation. Asthma, a respiratory disease, is notably characterized by reversible airway obstruction, persistent lung inflammation, and airway hyperresponsiveness (AHR). Nasal insufflation of IL-11 causes AHR in wild-type mice while lung inflammation induced by antigen sensitization and challenge, which mimics features of atopic asthma in humans, is attenuated in mice genetically deficient in IL-11 receptor subunit α-1 (IL-11Rα1-deficient mice), a transmembrane receptor that is required conjointly with glycoprotein 130 to transduce IL-11 signaling. Nevertheless, the contribution of IL-11Rα1 to characteristics of nonatopic asthma is unknown. Thus, based on the aforementioned observations, we hypothesized that genetic deficiency of IL-11Rα1 attenuates lung inflammation and increases airway responsiveness after acute inhalation exposure to ozone (O3), a criteria pollutant and nonatopic asthma stimulus. Accordingly, 4 and/or 24 h after cessation of exposure to filtered room air or O3, we assessed lung inflammation and airway responsiveness in wild-type and IL-11Rα1-deficient mice. With the exception of bronchoalveolar lavage macrophages and adiponectin, which were significantly increased and decreased, respectively, in O3-exposed IL-11Rα1-deficient as compared with O3-exposed wild-type mice, no other genotype-related differences in lung inflammation indices that we quantified were observed in O3-exposed mice. However, airway responsiveness to acetyl-β-methylcholine chloride (methacholine) was significantly diminished in IL-11Rα1-deficient as compared with wild-type mice after O3 exposure. In conclusion, these results demonstrate that IL-11Rα1 minimally contributes to lung inflammation but is required for maximal airway responsiveness to methacholine in a mouse model of nonatopic asthma.
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Affiliation(s)
- Richard A Johnston
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas
| | - Constance L Atkins
- Division of Pulmonary Medicine, Department of Pediatrics, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas
| | - Saad R Siddiqui
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas
| | - William T Jackson
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas
| | - Nicholas C Mitchell
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas
| | - Chantal Y Spencer
- Section of Pediatric Pulmonology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Albert W Pilkington
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia
| | - Michael L Kashon
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia
| | - Ikram U Haque
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas
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Wilson ML, Thysell JA, Baumann KK, Quaranta DV, Liang WS, Erickson MA. Effects of Anesthesia on Ozone-Induced Lung and Systemic Inflammation. Lung 2022; 200:269-275. [PMID: 35199228 PMCID: PMC9038869 DOI: 10.1007/s00408-022-00514-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 01/18/2022] [Indexed: 11/27/2022]
Abstract
PURPOSE Anesthetics are required for procedures that deliver drugs/biologics, infectious/inflammatory agents, and toxicants directly to the lungs. However, the possible confounding effects of anesthesia on lung inflammation and injury are underreported. Here, we evaluated the effects of two commonly used anesthetic regimens on lung inflammatory responses to ozone in mice. METHODS We tested the effects of brief isoflurane (Iso) or ketamine/xylazine/atipamezole (K/X/A) anesthesia prior to ozone exposure (4 h, 3 ppm) on lung inflammatory responses in mice. Anesthesia regimens modeled those used for non-surgical intratracheal instillations and were administered 1-2 h or 24 h prior to initiating ozone exposure. RESULTS We found that Iso given 1-2 h prior to ozone inhibited inflammatory responses in the lung, and this effect was absent when Iso was given 23-24 h prior to ozone. In contrast, K/X/A given 1-2 h prior to ozone increased lung and systemic inflammation. CONCLUSION Our results highlight the need to comprehensively evaluate anesthesia as an experimental variable in the assessment of lung inflammation in response to ozone and other inflammatory stimuli.
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Affiliation(s)
- Miranda L Wilson
- Veterans Administration Puget Sound Healthcare System, 1660 S. Columbian Way, S-182, Seattle, WA, 98108, USA
- Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Pl, New York, NY, 10029, USA
| | - Jarl A Thysell
- Veterans Administration Puget Sound Healthcare System, 1660 S. Columbian Way, S-182, Seattle, WA, 98108, USA
- Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Box 359755, Seattle, WA, 98104, USA
| | - Kristen K Baumann
- Veterans Administration Puget Sound Healthcare System, 1660 S. Columbian Way, S-182, Seattle, WA, 98108, USA
| | - Danny V Quaranta
- Veterans Administration Puget Sound Healthcare System, 1660 S. Columbian Way, S-182, Seattle, WA, 98108, USA
- Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Box 359755, Seattle, WA, 98104, USA
| | - W Sandy Liang
- Veterans Administration Puget Sound Healthcare System, 1660 S. Columbian Way, S-182, Seattle, WA, 98108, USA
| | - Michelle A Erickson
- Veterans Administration Puget Sound Healthcare System, 1660 S. Columbian Way, S-182, Seattle, WA, 98108, USA.
- Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Washington, 325 9th Avenue, Box 359755, Seattle, WA, 98104, USA.
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Fransen LFH, Leonard MO. Small Airway Susceptibility to Chemical and Particle Injury. Respiration 2021; 101:321-333. [PMID: 34649249 DOI: 10.1159/000519344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 08/11/2021] [Indexed: 11/19/2022] Open
Abstract
Small airways (SA) in humans are commonly defined as those conducting airways <2 mm in diameter. They are susceptible to particle- and chemical-induced injury and play a major role in the development of airway disease such as COPD and asthma. Susceptibility to injury can be attributed in part to structural features including airflow dynamics and tissue architecture, but recent evidence may indicate a more prominent role for cellular composition in directing toxicological responses. Animal studies support the hypothesis that inherent cellular differences across the tracheobronchial tree, including metabolic CYP450 expression in the distal conducting airways, can influence SA susceptibility to injury. Currently, there is insufficient information in humans to make similar conclusions, prompting further necessary work in this area. An understanding of why the SA are more susceptible to certain chemical and particle exposures than other airway regions is fundamental to our ability to identify hazardous materials, their properties, and accompanying exposure scenarios that compromise lung function. It is also important for the ability to develop appropriate models for toxicity testing. Moreover, it is central to our understanding of SA disease aetiology and how interventional strategies for treatment may be developed. In this review, we will document the structural and cellular airway regional differences that are likely to influence airway susceptibility to injury, including the role of secretory club cells. We will also describe recent advances in single-cell sequencing of human airways, which have provided unprecedented details of cell phenotype, likely to impact airway chemical and particle injury.
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Affiliation(s)
| | - Martin Oliver Leonard
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot, United Kingdom
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Transcriptomics Underlying Pulmonary Ozone Pathogenesis Regulated by Inflammatory Mediators in Mice. Antioxidants (Basel) 2021; 10:antiox10091489. [PMID: 34573120 PMCID: PMC8466999 DOI: 10.3390/antiox10091489] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/13/2021] [Accepted: 09/15/2021] [Indexed: 11/17/2022] Open
Abstract
Ozone (O3) is the predominant oxidant air pollutant associated with airway inflammation, lung dysfunction, and the worsening of preexisting respiratory diseases. We previously demonstrated the injurious roles of pulmonary immune receptors, tumor necrosis factor receptor (TNFR), and toll-like receptor 4, as well as a transcription factor NF-κB, in response to O3 in mice. In the current study, we profiled time-dependent and TNFR- and NF-κB-regulated lung transcriptome changes by subacute O3 to illuminate the underlying molecular events and downstream targets. Mice lacking Tnfr1/Tnfr2 (Tnfr-/-) or Nfkb1 (Nfkb1-/-) were exposed to air or O3. Lung RNAs were prepared for cDNA microarray analyses, and downstream and upstream mechanisms were predicted by pathway analyses of the enriched genes. O3 significantly altered the genes involved in inflammation and redox (24 h), cholesterol biosynthesis and vaso-occlusion (48 h), and cell cycle and DNA repair (48–72 h). Transforming growth factor-β1 was a predicted upstream regulator. Lack of Tnfr suppressed the immune cell proliferation and lipid-related processes and heightened epithelial cell integrity, and Nfkb1 deficiency markedly suppressed lung cell cycle progress during O3 exposure. Common differentially regulated genes by TNFR and NF-κB1 (e.g., Casp8, Il6, and Edn1) were predicted to protect the lungs from cell death, connective tissue injury, and inflammation. Il6-deficient mice were susceptible to O3-induced protein hyperpermeability, indicating its defensive role, while Tnf-deficient mice were resistant to overall lung injury caused by O3. The results elucidated transcriptome dynamics and provided new insights into the molecular mechanisms regulated by TNFR and NF-κB1 in pulmonary subacute O3 pathogenesis.
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Choudhary I, Vo T, Paudel K, Patial S, Saini Y. Compartment-specific transcriptomics of ozone-exposed murine lungs reveals sex- and cell type-associated perturbations relevant to mucoinflammatory lung diseases. Am J Physiol Lung Cell Mol Physiol 2020; 320:L99-L125. [PMID: 33026818 DOI: 10.1152/ajplung.00381.2020] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Ozone is known to cause lung injury, and resident cells of the respiratory tract (i.e., epithelial cells and macrophages) respond to inhaled ozone in a variety of ways that affect their survival, morphology, and functioning. However, a complete understanding of the sex-associated and the cell type-specific gene expression changes in response to ozone exposure is still limited. Through transcriptome profiling, we aimed to analyze gene expression alterations and associated enrichment of biological pathways in three distinct cell type-enriched compartments of ozone-exposed murine lungs. We subchronically exposed adult male and female mice to 0.8 ppm ozone or filtered air. RNA-Seq was performed on airway epithelium-enriched airways, parenchyma, and purified airspace macrophages. Differential gene expression and biological pathway analyses were performed and supported by cellular and immunohistochemical analyses. While a majority of differentially expressed genes (DEGs) in ozone-exposed versus air-exposed groups were common between both sexes, sex-specific DEGs were also identified in all of the three tissue compartments. As compared with ozone-exposed males, ozone-exposed females had significant alterations in gene expression in three compartments. Pathways relevant to cell division and DNA repair were enriched in the ozone-exposed airways, indicating ozone-induced airway injury and repair, which was further supported by immunohistochemical analyses. In addition to cell division and DNA repair pathways, inflammatory pathways were also enriched within the parenchyma, supporting contribution by both epithelial and immune cells. Further, immune response and cytokine-cytokine receptor interactions were enriched in macrophages, indicating ozone-induced macrophage activation. Finally, our analyses also revealed the overall upregulation of mucoinflammation- and mucous cell metaplasia-associated pathways following ozone exposure.
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Affiliation(s)
- Ishita Choudhary
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana
| | - Thao Vo
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana
| | - Kshitiz Paudel
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana
| | - Sonika Patial
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana
| | - Yogesh Saini
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana
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Patial S, Saini Y. Lung macrophages: current understanding of their roles in Ozone-induced lung diseases. Crit Rev Toxicol 2020; 50:310-323. [PMID: 32458707 DOI: 10.1080/10408444.2020.1762537] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Through the National Ambient Air Quality Standards (NAAQS), the Clean Air Act of the United States outlines acceptable levels of six different air pollutants considered harmful to humans and the environment. Included in this list is ozone (O3), a highly reactive oxidant gas, respiratory health hazard, and common environmental air pollutant at ground level. The respiratory health effects due to O3 exposure are often associated with molecular and cellular perturbations in the respiratory tract. Periodic review of NAAQS requires comprehensive scientific evaluation of the public health effects of these pollutants, which is formulated through integrated science assessment (ISA) of the most policy-relevant scientific literature. This review focuses on the protective and pathogenic effects of macrophages in the O3-exposed respiratory tract, with emphasis on mouse model-based toxicological studies. Critical findings from 39 studies containing the words O3, macrophage, mice, and lung within the full text were assessed. While some of these studies highlight the presence of disease-relevant pathogenic macrophages in the airspaces, others emphasize a protective role for macrophages in O3-induced lung diseases. Moreover, a comprehensive list of currently known macrophage-specific roles in O3-induced lung diseases is included in this review and the significant knowledge gaps that still exist in the field are outlined. In conclusion, there is a vital need in this field for additional policy-relevant scientific information, including mechanistic studies to further define the role of macrophages in response to O3.
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Affiliation(s)
- Sonika Patial
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
| | - Yogesh Saini
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA
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8
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Liu S, Sirohi K, Verma M, McKay J, Michalec L, Sripada A, Danhorn T, Rollins D, Good J, Gorska MM, Martin RJ, Alam R. Optimal identification of human conventional and nonconventional (CRTH2 -IL7Rα -) ILC2s using additional surface markers. J Allergy Clin Immunol 2020; 146:390-405. [PMID: 32032632 DOI: 10.1016/j.jaci.2020.01.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 01/10/2020] [Accepted: 01/16/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Human type 2 innate lymphoid cells (ILC2s) are identified by coupled detection of CRTH2 and IL7Rα on lineage negative (Lin-) cells. Type 2 cytokine production by CRTH2-IL7Rα- innate lymphoid cells (ILCs) is unknown. OBJECTIVE We sought to identify CRTH2-IL7Rα- type 2 cytokine-producing ILCs and their disease relevance. METHODS We studied human blood and lung ILCs from asthmatic and control subjects by flow cytometry, ELISA, RNA sequencing, quantitative PCR, adoptive transfer to mice, and measurement of airway hyperreactivity by Flexivent. RESULTS We found that IL-5 and IL-13 were expressed not only by CRTH2+ but also by CRTH2-IL7Rα+ and CRTH2-IL7Rα- (double-negative [DN]) human blood and lung cells. All 3 ILC populations expressed type 2 genes and induced airway hyperreactivity when adoptively transferred to mice. The frequency of type 2 cytokine-positive IL7Rα and DN ILCs were similar to that of CRTH2 ILCs in the blood and lung. Their frequency was higher in asthmatic patients than in disease controls. Transcriptomic analysis of CRTH2, IL7Rα, and DN ILCs confirmed the expression of mRNA for type 2 transcription factors in all 3 populations. Unexpectedly, the mRNA for GATA3 and IL-5 correlated better with mRNA for CD30, TNFR2, ICOS, CCR4, and CD200R1 than for CRTH2. By using a combination of these surface markers, especially CD30/TNFR2, we identified a previously unrecognized ILC2 population. CONCLUSIONS The commonly used surface markers for human ILC2s leave a majority of type 2 cytokine-producing ILC2s unaccounted for. We identified top GATA3-correlated cell surface-expressed genes in human ILCs by RNA sequencing. These new surface markers, such as CD30 and TNFR2, identified a previously unrecognized human ILC2 population. This ILC2 population is likely to contribute to asthma.
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Affiliation(s)
- Sucai Liu
- Division of Allergy and Immunology, Department of Medicine, Denver, Colo
| | - Kapil Sirohi
- Division of Allergy and Immunology, Department of Medicine, Denver, Colo
| | - Mukesh Verma
- Division of Allergy and Immunology, Department of Medicine, Denver, Colo
| | - Jerome McKay
- Division of Allergy and Immunology, Department of Medicine, Denver, Colo
| | - Lidia Michalec
- Division of Allergy and Immunology, Department of Medicine, Denver, Colo
| | - Anand Sripada
- Division of Allergy and Immunology, Department of Medicine, Denver, Colo
| | - Tomas Danhorn
- Center for Genes and Environment, National Jewish Health, Denver, Colo
| | - Donald Rollins
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Denver, Colo; School of Medicine, University of Colorado Denver, Denver, Colo
| | - James Good
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Denver, Colo; School of Medicine, University of Colorado Denver, Denver, Colo
| | - Magdalena M Gorska
- Division of Allergy and Immunology, Department of Medicine, Denver, Colo; School of Medicine, University of Colorado Denver, Denver, Colo
| | - Richard J Martin
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Denver, Colo; School of Medicine, University of Colorado Denver, Denver, Colo
| | - Rafeul Alam
- Division of Allergy and Immunology, Department of Medicine, Denver, Colo; School of Medicine, University of Colorado Denver, Denver, Colo.
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Brown TA, Tashiro H, Kasahara DI, Cho Y, Shore SA. Early life microbiome perturbation alters pulmonary responses to ozone in male mice. Physiol Rep 2020; 8:e14290. [PMID: 31981310 PMCID: PMC6981302 DOI: 10.14814/phy2.14290] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Early life changes in the microbiome contribute to the development of allergic asthma, but little is known about the importance of the microbiome for other forms of asthma. Ozone is a nonatopic asthma trigger that causes airway hyperresponsiveness and neutrophil recruitment to the lungs. The purpose of this study was to test the hypothesis that early life perturbations in the gut microbiome influence subsequent responses to ozone. To that end, we placed weanling mouse pups from The Jackson Laboratories or from Taconic Farms in sex-specific cages either with other mice from the same vendor (same-housed) or with mice from the opposite vendor (cohoused). Mice were maintained with these cagemates until use. The gut microbial community differs in mice from Jackson Labs and Taconic Farms, and cohousing mice transfers fecal microbiota from one mouse to another. Indeed, 16S rRNA sequencing of fecal DNA indicated that differences in the gut microbiomes of Jackson and Taconic same-housed mice were largely abolished when the mice were cohoused. At 10-12 weeks of age, mice were exposed to room air or ozone (2 ppm for 3 hr). Compared to same-housed mice, cohoused male but not female mice had reduced ozone-induced airway hyperresponsiveness and reduced ozone-induced increases in bronchoalveolar lavage neutrophils. Ozone-induced airway hyperresponsiveness was greater in male than in female mice and the sex difference was largely abolished in cohoused mice. The data indicate a role for early life microbial perturbations in pulmonary responses to a nonallergic asthma trigger.
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Affiliation(s)
- Traci A. Brown
- Molecular and Integrative Physiological Sciences ProgramDepartment of Environmental HealthHarvard T.H. Chan School of Public HealthBostonMAUSA
| | - Hiroki Tashiro
- Molecular and Integrative Physiological Sciences ProgramDepartment of Environmental HealthHarvard T.H. Chan School of Public HealthBostonMAUSA
| | - David I. Kasahara
- Molecular and Integrative Physiological Sciences ProgramDepartment of Environmental HealthHarvard T.H. Chan School of Public HealthBostonMAUSA
| | - Youngji Cho
- Molecular and Integrative Physiological Sciences ProgramDepartment of Environmental HealthHarvard T.H. Chan School of Public HealthBostonMAUSA
| | - Stephanie A. Shore
- Molecular and Integrative Physiological Sciences ProgramDepartment of Environmental HealthHarvard T.H. Chan School of Public HealthBostonMAUSA
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Zhang Y, Li X, He M, Zhang G, Bao W, Fei X, Zhang X, Zhang M, Zhang P. The effects of neutralizing anti-murine interleukin-17A monoclonal antibody on ozone-induced inflammation and glucocorticoids insensitivity in a murine model of asthma. Biomed Pharmacother 2019; 114:108786. [PMID: 30917335 DOI: 10.1016/j.biopha.2019.108786] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 03/09/2019] [Accepted: 03/13/2019] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND AND OBJECTIVE Exposure to ozone contributed to the worsening of inflammation and glucocorticoids insensitivity in OVA-challenged asthma. Interleukin-17A participates centrally in stages of the inflammatory response and glucocorticoids insensitivity. In this study, the effect of neutralizing anti-murine interleukin-17A monoclonal antibody (IL-17A mAb) on inflammation and glucocorticoids insensitivity in ozone-exposed and ovalbumin (OVA)-challenged mice was investigated. METHODS Mice were sensitized and challenged with OVA and then exposed to ozone. Dexamethasone (Dex) and IL-17A mAb were administrated in corresponding periods. RESULTS Compared with OVA-challenged mice, combination administration of ozone exposure and OVA challenge increased the recruitment of inflammatory cells in bronchoalveolar lavage fluid, enhanced the inflammation scores and levels of inflammatory cytokines and IL-17A mRNA, and caused the activation of p38 MAPK together with down regulation of glucocorticoids recepters (GR) in lung tissue. Monotherapy of IL-17A mAb partially attenuated lung inflammation in OVA-challenged and ozone-exposed mice, while the combination treatment of Dex and IL-17A mAb effectively reduced lung inflammation, inactivated p38 MAPK and up regulated GR in lung tissue. CONCLUSIONS Ozone exposure worsened OVA-challenged airway inflammation, activation of p38 MAPK and down regulation of GR in OVA-sensitized and -challenged mice, which was effectively counteracted by IL-17A mAb, and combination treatment of IL-17A mAb and Dex shows profound efficacy in inhibiting airway inflammation and improving glucocorticoids insensitivity synergistically.
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Affiliation(s)
- Yingying Zhang
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xingjing Li
- Department of Respiratory Medicine, The Shanghai First People's Hospital of Baoshan Branch, Shanghai, China
| | - Mudan He
- Department of Respiratory Medicine, The Shanghai First People's Hospital of Baoshan Branch, Shanghai, China
| | - Guoqing Zhang
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Wuping Bao
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xia Fei
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xue Zhang
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Min Zhang
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China.
| | - Pengyu Zhang
- Department of Respiratory and Critical Care Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China.
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Lo D, Kennedy JL, Kurten RC, Panettieri RA, Koziol-White CJ. Modulation of airway hyperresponsiveness by rhinovirus exposure. Respir Res 2018; 19:208. [PMID: 30373568 PMCID: PMC6206673 DOI: 10.1186/s12931-018-0914-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 10/17/2018] [Indexed: 01/12/2023] Open
Abstract
Rhinovirus (RV) exposure has been implicated in childhood development of wheeze evoking asthma and exacerbations of underlying airways disease. Studies such as the Copenhagen Prospective Studies on Asthma in Childhood (COPSAC) and Childhood Origins of ASThma (COAST) have identified RV as a pathogen inducing severe respiratory disease. RVs also modulate airway hyperresponsiveness (AHR), a key characteristic of such diseases. Although potential factors underlying mechanisms by which RV induces AHR have been postulated, the precise mechanisms of AHR following RV exposure remain elusive. A challenge to RV-related research stems from inadequate models for study. While human models raise ethical concerns and are relatively difficult in terms of subject recruitment, murine models are limited by susceptibility of infection to the relatively uncommon minor group (RV-B) serotypes, strains that are generally associated with infrequent clinical respiratory virus infections. Although a transgenic mouse strain that has been developed has enhanced susceptibility for infection with the common major group (RV-A) serotypes, few studies have focused on RV in the context of allergic airways disease rather than understanding RV-induced AHR. Recently, the receptor for the virulent RV-C CDHR3, was identified, but a dearth of studies have examined RV-C-induced effects in humans. Currently, the mechanisms by which RV infections modulate airway smooth muscle (ASM) shortening or excitation-contraction coupling remain elusive. Further, only one study has investigated the effects of RV on bronchodilatory mechanisms, with only speculation as to mechanisms underlying RV-mediated modulation of bronchoconstriction.
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Affiliation(s)
- Dennis Lo
- Department of Medicine, Rutgers Institute for Translational Medicine and Science, Rutgers University, New Brunswick, NJ, USA
| | - Joshua L Kennedy
- Department of Pediatrics, Division of Allergy and Immunology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Richard C Kurten
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Reynold A Panettieri
- Department of Medicine, Rutgers Institute for Translational Medicine and Science, Rutgers University, New Brunswick, NJ, USA
| | - Cynthia J Koziol-White
- Department of Medicine, Rutgers Institute for Translational Medicine and Science, Rutgers University, New Brunswick, NJ, USA.
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12
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Mechanistic Basis for Obesity-related Increases in Ozone-induced Airway Hyperresponsiveness in Mice. Ann Am Thorac Soc 2018; 14:S357-S362. [PMID: 29161088 DOI: 10.1513/annalsats.201702-140aw] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Obesity is a risk factor for asthma, especially nonallergic asthma. Ozone, a common air pollutant, is a nonallergic asthma trigger. Importantly, ozone-induced decrements in lung function are greater in obese and overweight human subjects than in lean individuals. Obese mice also exhibit exaggerated pulmonary responses to ozone. Ozone causes greater increases in pulmonary resistance, in bronchoalveolar lavage neutrophils, and in airway hyperresponsiveness in obese than in lean mice. Our data indicate that IL-33 plays a role in mediating these events. Ozone causes greater release of IL-33 into bronchoalveolar lavage fluid in obese than in lean mice. Furthermore, an antibody blocking the IL-33 receptor, ST2, attenuates ozone-induced airway hyperresponsiveness in obese but not in lean mice. Our data also indicate a complex role for tumor necrosis factor (TNF)-α in obesity-related effects on the response to ozone. In obese mice, genetic deficiency in either TNF-α or TNF-α receptor 2 augments ozone-induced airway hyperresponsiveness, whereas TNF-α receptor 2 deficiency virtually abolishes ozone-induced airway hyperresponsiveness in lean mice. Finally, obesity is known to alter the gut microbiome. In female mice, antibiotics attenuate obesity-related increases in the effect of ozone on airway hyperresponsiveness, possibly by altering microbial production of short-chain fatty acids. Asthma control is often difficult to achieve in obese patients with asthma. Our data suggest that therapeutics directed against IL-33 may ultimately prove effective in these patients. The data also suggest that dietary manipulations and other strategies (prebiotics, probiotics) that alter the microbiome and/or its metabolic products may represent a new frontier for treating asthma in obese individuals.
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13
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Kim BG, Lee PH, Lee SH, Park CS, Jang AS. Impact of ozone on claudins and tight junctions in the lungs. ENVIRONMENTAL TOXICOLOGY 2018; 33:798-806. [PMID: 29673049 DOI: 10.1002/tox.22566] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 03/28/2018] [Accepted: 04/01/2018] [Indexed: 06/08/2023]
Abstract
Claudins (CLDNs) are a major transmembrane protein component of tight junctions (TJs) in endothelia and epithelia. CLDNs are not only essential for sustaining the role of TJs in cell permeability but are also vital for cell signaling through protein-protein interactions. Ozone induces oxidative stress and lung inflammation in humans and experimental models, but the impact of ozone on claudins remains poorly understood. This study was to determine the expression of TJ proteins, such as claudin 3, 4, 5, and 14 following ozone exposure. Mice were exposed to 0.1, 1, or 2 ppm of ozone or ambient air for 6 h for 3 days. The impact of ozone on CLDNs, Nrf2, Keap1, and reactive oxygen species (ROS) were estimated using immunoblotting, immunohistochemical staining, confocal imaging, and ELISA analysis in mice and bronchial epithelial cells. Mice exposed to ozone experienced increased airway inflammatory cell infiltration and bronchial hyper-responsiveness compared to control mice. Additionally, CLDN3, CLDN4, ROS, Nrf2, and Keap1 protein expression increased, and lung CLDN14 protein expression decreased, in mice exposed to ozone compared with control mice. These results indicate that CLDNs are involved in airway inflammation following ozone exposure, suggesting that ozone affects TJ proteins through oxidative mechanisms.
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Affiliation(s)
- Byeong-Gon Kim
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro Wonmi-gu, Bucheon, 14584, Korea
| | - Pureun-Haneul Lee
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro Wonmi-gu, Bucheon, 14584, Korea
| | - Sun-Hye Lee
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro Wonmi-gu, Bucheon, 14584, Korea
| | - Choon-Sik Park
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro Wonmi-gu, Bucheon, 14584, Korea
| | - An-Soo Jang
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro Wonmi-gu, Bucheon, 14584, Korea
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14
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Erken G, Erken HA, Bilen C, Gencer N. The effects of ex vivo ozone treatment on human erythrocyte carbonic anhydrase enzyme. Arch Physiol Biochem 2018; 124:171-174. [PMID: 28871825 DOI: 10.1080/13813455.2017.1371194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Ozone autohemotherapy is used in the treatment of some diseases. Carbonic anhydrases (CAs, EC 4.2.1.1) are metalloenzymes and play a role in homeostatic mechanisms. The aim of this study was to investigate the effects of ozone on human red blood cell CA (hCA) enzyme activity. Blood samples were treated with different doses of ozone (10, 20, 30 µg/ml) and the erythrocyte total CA activities were determined. Also, purified hCAI and hCAII isozymes were treated with the same doses of ozone and the enzyme activities were measured. About 30 µg/ml ozone treatment decreased the purified hCAI and hCAII activity and increased the total CA activity compared to the control. Because the implication of CAs on many physiological and biochemical processes is linked to pathologies, it can be suggested that the ozone at a concentration of 30 µg/ml is safely used by autohaemotherapy in a well-designed clinical trial.
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Affiliation(s)
- Gülten Erken
- a Department of Physiology, Faculty of Medicine , Balikesir University , Balikesir , Turkey
| | - Haydar Ali Erken
- a Department of Physiology, Faculty of Medicine , Balikesir University , Balikesir , Turkey
| | - Cigdem Bilen
- b Department of Chemistry, Faculty of Sciences , Balikesir University , Balikesir , Turkey
| | - Nahit Gencer
- b Department of Chemistry, Faculty of Sciences , Balikesir University , Balikesir , Turkey
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15
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Li X, Michaeloudes C, Zhang Y, Wiegman CH, Adcock IM, Lian Q, Mak JCW, Bhavsar PK, Chung KF. Mesenchymal stem cells alleviate oxidative stress-induced mitochondrial dysfunction in the airways. J Allergy Clin Immunol 2018; 141:1634-1645.e5. [PMID: 28911970 DOI: 10.1016/j.jaci.2017.08.017] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 07/07/2017] [Accepted: 08/23/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND Oxidative stress-induced mitochondrial dysfunction can contribute to inflammation and remodeling in patients with chronic obstructive pulmonary disease (COPD). Mesenchymal stem cells protect against lung damage in animal models of COPD. It is unknown whether these effects occur through attenuating mitochondrial dysfunction in airway cells. OBJECTIVE We sought to examine the effect of induced pluripotent stem cell-derived mesenchymal stem cells (iPSC-MSCs) on oxidative stress-induce mitochondrial dysfunction in human airway smooth muscle cells (ASMCs) in vitro and in mouse lungs in vivo. METHODS ASMCs were cocultured with iPSC-MSCs in the presence of cigarette smoke medium (CSM), and mitochondrial reactive oxygen species (ROS) levels, mitochondrial membrane potential (ΔΨm), and apoptosis were measured. Conditioned medium from iPSC-MSCs and transwell cocultures were used to detect any paracrine effects. The effect of systemic injection of iPSC-MSCs on airway inflammation and hyperresponsiveness in ozone-exposed mice was also investigated. RESULTS Coculture of iPSC-MSCs with ASMCs attenuated CSM-induced mitochondrial ROS, apoptosis, and ΔΨm loss in ASMCs. iPSC-MSC-conditioned medium or transwell cocultures with iPSC-MSCs reduced CSM-induced mitochondrial ROS but not ΔΨm or apoptosis in ASMCs. Mitochondrial transfer from iPSC-MSCs to ASMCs was observed after direct coculture and was enhanced by CSM. iPSC-MSCs attenuated ozone-induced mitochondrial dysfunction, airway hyperresponsiveness, and inflammation in mouse lungs. CONCLUSION iPSC-MSCs offered protection against oxidative stress-induced mitochondrial dysfunction in human ASMCs and in mouse lungs while reducing airway inflammation and hyperresponsiveness. These effects are, at least in part, dependent on cell-cell contact, which allows for mitochondrial transfer, and paracrine regulation. Therefore iPSC-MSCs show promise as a therapy for oxidative stress-dependent lung diseases, such as COPD.
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Affiliation(s)
- Xiang Li
- National Heart and Lung Institute, Imperial College London, London, United Kingdom; Department of Medicine, University of Hong Kong, Hong Kong, China
| | | | - Yuelin Zhang
- Department of Medicine, University of Hong Kong, Hong Kong, China; School of Biomedical Sciences, University of Hong Kong, Hong Kong, China
| | - Coen H Wiegman
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Ian M Adcock
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Qizhou Lian
- Department of Medicine, University of Hong Kong, Hong Kong, China; School of Biomedical Sciences, University of Hong Kong, Hong Kong, China; Shenzhen Institute of Research and Innovation, University of Hong Kong, Hong Kong, China.
| | - Judith C W Mak
- Department of Medicine, University of Hong Kong, Hong Kong, China; Department of Pharmacology & Pharmacy, University of Hong Kong, Hong Kong, China; Shenzhen Institute of Research and Innovation, University of Hong Kong, Hong Kong, China.
| | - Pankaj K Bhavsar
- National Heart and Lung Institute, Imperial College London, London, United Kingdom.
| | - Kian Fan Chung
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
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16
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Role of tumor necrosis factor-α and its receptors in diesel exhaust particle-induced pulmonary inflammation. Sci Rep 2017; 7:11508. [PMID: 28912506 PMCID: PMC5599628 DOI: 10.1038/s41598-017-11991-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 08/29/2017] [Indexed: 01/05/2023] Open
Abstract
Inhalation of diesel exhaust particles (DEP) induces an inflammatory reaction in the lung. However, the underlying mechanisms remain to be elucidated. Tumor necrosis factor alpha (TNF-α) is a pro-inflammatory cytokine that operates by binding to tumor necrosis factor receptor 1 (TNFR1) and tumor necrosis factor receptor 2 (TNFR2). The role of TNF-α signaling and the importance of either TNFR1 or TNFR2 in the DEP-induced inflammatory response has not yet been elucidated. TNF-α knockout (KO), TNFR1 KO, TNFR2 KO, TNFR1/TNFR2 double KO (TNFR-DKO) and wild type (WT) mice were intratracheally exposed to saline or DEP. Pro-inflammatory cells and cytokines were assessed in the bronchoalveolar lavage fluid (BALF). Exposure to DEP induced a dose-dependent inflammation in the BALF in WT mice. In addition, levels of TNF-α and its soluble receptors were increased upon exposure to DEP. The DEP-induced inflammation in the BALF was decreased in TNF-α KO, TNFR-DKO and TNFR2 KO mice. In contrast, the inflammatory response in the BALF of DEP-exposed TNFR1 KO mice was largely comparable with WT controls. In conclusion, these data provide evidence for a regulatory role of TNF-α in DEP-induced pulmonary inflammation and identify TNFR2 as the most important receptor in mediating these inflammatory effects.
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17
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Li W, Dorans KS, Wilker EH, Rice MB, Ljungman PL, Schwartz JD, Coull BA, Koutrakis P, Gold DR, Keaney JF, Vasan RS, Benjamin EJ, Mittleman MA. Short-Term Exposure to Ambient Air Pollution and Biomarkers of Systemic Inflammation: The Framingham Heart Study. Arterioscler Thromb Vasc Biol 2017; 37:1793-1800. [PMID: 28751572 DOI: 10.1161/atvbaha.117.309799] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 07/10/2017] [Indexed: 01/05/2023]
Abstract
OBJECTIVE The objective of this study is to examine associations between short-term exposure to ambient air pollution and circulating biomarkers of systemic inflammation in participants from the Framingham Offspring and Third Generation cohorts in the greater Boston area. APPROACH AND RESULTS We included 3996 noncurrent smoking participants (mean age, 53.6 years; 54% women) who lived within 50 km from a central air pollution monitoring site in Boston, MA, and calculated the 1- to 7-day moving averages of fine particulate matter (diameter<2.5 µm), black carbon, sulfate, nitrogen oxides, and ozone before the examination visits. We used linear mixed effects models for C-reactive protein and tumor necrosis factor receptor 2, which were measured up to twice for each participant; we used linear regression models for interleukin-6, fibrinogen, and tumor necrosis factor α, which were measured once. We adjusted for demographics, socioeconomic position, lifestyle, time, and weather. The 3- to 7-day moving averages of fine particulate matter (diameter<2.5 µm) and sulfate were positively associated with C-reactive protein concentrations. A 5 µg/m3 higher 5-day moving average fine particulate matter (diameter<2.5 µm) was associated with 4.2% (95% confidence interval: 0.8, 7.6) higher circulating C-reactive protein. Positive associations were also observed for nitrogen oxides with interleukin-6 and for black carbon, sulfate, and ozone with tumor necrosis factor receptor 2. However, black carbon, sulfate, and nitrogen oxides were negatively associated with fibrinogen, and sulfate was negatively associated with tumor necrosis factor α. CONCLUSIONS Higher short-term exposure to relatively low levels of ambient air pollution was associated with higher levels of C-reactive protein, interleukin-6, and tumor necrosis factor receptor 2 but not fibrinogen or tumor necrosis factor α in individuals residing in the greater Boston area.
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Affiliation(s)
- Wenyuan Li
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - Kirsten S Dorans
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - Elissa H Wilker
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - Mary B Rice
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - Petter L Ljungman
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - Joel D Schwartz
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - Brent A Coull
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - Petros Koutrakis
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - Diane R Gold
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - John F Keaney
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - Ramachandran S Vasan
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - Emelia J Benjamin
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.)
| | - Murray A Mittleman
- From the Departments of Epidemiology (W.L., K.S.D., E.H.W., J.D.S., M.A.M.), Environmental Health (J.D.S., P.K., D.R.G.), and Biostatistics (B.A.C.), Harvard T.H. Chan School of Public Health, Boston, MA; Cardiovascular Epidemiology Research Unit, Division of Cardiology (W.L., K.S.D., E.H.W., P.L.L., M.A.M.) and Division of Pulmonary, Critical Care and Sleep Medicine (M.B.R.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (P.L.L.); Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA (D.R.G.); Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester (J.F.K.); National Heart, Lung, and Blood Institute's and Boston University's Framingham Heart Study, MA (R.S.V., E.J.B.); Preventive Medicine and Cardiology Sections, Department of Medicine, Boston University School of Medicine, MA (R.S.V., E.J.B.); and Department of Epidemiology, Boston University School of Public Health, MA (R.S.V., E.J.B.).
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Abstract
Increased levels of tumor necrosis factor (TNF) α have been linked to a number of pulmonary inflammatory diseases including asthma, chronic obstructive pulmonary disease (COPD), acute lung injury (ALI)/acute respiratory distress syndrome (ARDS), sarcoidosis, and interstitial pulmonary fibrosis (IPF). TNFα plays multiple roles in disease pathology by inducing an accumulation of inflammatory cells, stimulating the generation of inflammatory mediators, and causing oxidative and nitrosative stress, airway hyperresponsiveness and tissue remodeling. TNFα-targeting biologics, therefore, present a potentially highly efficacious treatment option. This review summarizes current knowledge on the role of TNFα in pulmonary disease pathologies, with a focus on the therapeutic potential of TNFα-targeting agents in treating inflammatory lung diseases.
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Affiliation(s)
- Rama Malaviya
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ, USA
| | - Jeffrey D Laskin
- Department of Environmental and Occupational Health, School of Public Health, Rutgers University, Piscataway, NJ, USA
| | - Debra L Laskin
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ, USA.
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19
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Khorasanizadeh M, Eskian M, Gelfand EW, Rezaei N. Mitogen-activated protein kinases as therapeutic targets for asthma. Pharmacol Ther 2017; 174:112-126. [DOI: 10.1016/j.pharmthera.2017.02.024] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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20
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Han HK, Luk SM, Kinsella MT. A case report of ocular chemical injury secondary to ozone gas. Acta Ophthalmol 2017; 95:e348-e349. [PMID: 27473677 DOI: 10.1111/aos.13171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Lee H, Kim EK, Kim HY, Kim TI. Effects of Exposure to Ozone on the Ocular Surface in an Experimental Model of Allergic Conjunctivitis. PLoS One 2017; 12:e0169209. [PMID: 28046113 PMCID: PMC5207719 DOI: 10.1371/journal.pone.0169209] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 12/13/2016] [Indexed: 12/30/2022] Open
Abstract
Based on previous findings that ozone can induce an inflammatory response in the ocular surface of an animal model and in cultured human conjunctival epithelial cells, we investigated whether exposure to ozone exacerbates symptoms of allergic conjunctivitis. We evaluated the effects of exposure to ozone on conjunctival chemosis, conjunctival injection, corneal and conjunctival fluorescein staining scores, production of inflammatory cytokines in tears, and aqueous tear production in a mouse model of allergic conjunctivitis. To validate our in vivo results, we used interleukin (IL)-1α-pretreated conjunctival epithelial cells as an in vitro substitute for the mouse model. We evaluated whether exposure to ozone increased the inflammatory response and altered oxidative status and mitochondrial function in IL-1α-pretreated conjunctival epithelial cells. In the in vivo study, ozone induced increases in conjunctival chemosis, conjunctival injection, corneal and conjunctival fluorescein staining scores, and production of inflammatory cytokines, accompanied by a decrease in tear volume. In the in vitro study, exposure to ozone led to additional increases in IL-6 and tumor necrosis factor-α mRNA levels, which were already induced by treatment with IL-1α. Ozone did not induce any changes in cell viability. Pretreatment with IL-1α increased the expression of manganese superoxide dismutase, and exposure to ozone led to additional increments in the expression of this antioxidant enzyme. Ozone did not induce any changes in mitochondrial activity or expression of mitochondrial enzymes and proteins related to mitochondrial function, with the exception of phosphor-mammalian target of rapamycin. Treatment with butylated hydroxyanisole, a free radical scavenger, attenuated the ozone-induced increases in IL-6 expression in IL-1α-pretreated conjunctival epithelial cells. Therefore, we conclude that exposure to ozone exacerbates the detrimental effects on the integrity of the ocular surface caused by conjunctival allergic reactions, and further increases the inflammatory response in IL-1α-pretreated conjunctival epithelial cells.
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Affiliation(s)
- Hun Lee
- Department of Ophthalmology, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, South Korea
- Department of Ophthalmology, The Institute of Vision Research, Yonsei University College of Medicine, Seoul, South Korea
| | - Eung Kweon Kim
- Department of Ophthalmology, The Institute of Vision Research, Yonsei University College of Medicine, Seoul, South Korea
- Department of Ophthalmology, Corneal Dystrophy Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - Hee Young Kim
- Department of Ophthalmology, The Institute of Vision Research, Yonsei University College of Medicine, Seoul, South Korea
- Department of Ophthalmology, Corneal Dystrophy Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - Tae-im Kim
- Department of Ophthalmology, The Institute of Vision Research, Yonsei University College of Medicine, Seoul, South Korea
- Department of Ophthalmology, Corneal Dystrophy Research Institute, Yonsei University College of Medicine, Seoul, South Korea
- * E-mail:
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22
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Elkhidir HS, Richards JB, Cromar KR, Bell CS, Price RE, Atkins CL, Spencer CY, Malik F, Alexander AL, Cockerill KJ, Haque IU, Johnston RA. Plasminogen activator inhibitor-1 does not contribute to the pulmonary pathology induced by acute exposure to ozone. Physiol Rep 2016; 4:4/18/e12983. [PMID: 27670409 PMCID: PMC5037925 DOI: 10.14814/phy2.12983] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 08/31/2016] [Indexed: 11/24/2022] Open
Abstract
Expression of plasminogen activator inhibitor (PAI)-1, the major physiological inhibitor of fibrinolysis, is increased in the lung following inhalation of ozone (O3), a gaseous air pollutant. PAI-1 regulates expression of interleukin (IL)-6, keratinocyte chemoattractant (KC), and macrophage inflammatory protein (MIP)-2, which are cytokines that promote lung injury, pulmonary inflammation, and/or airway hyperresponsiveness following acute exposure to O3 Given these observations, we hypothesized that PAI-1 contributes to the severity of the aforementioned sequelae by regulating expression of IL-6, KC, and MIP-2 following acute exposure to O3 To test our hypothesis, wild-type mice and mice genetically deficient in PAI-1 (PAI-1-deficient mice) were acutely exposed to either filtered room air or O3 (2 ppm) for 3 h. Four and/or twenty-four hours following cessation of exposure, indices of lung injury [bronchoalveolar lavage fluid (BALF) protein and epithelial cells], pulmonary inflammation (BALF IL-6, KC, MIP-2, macrophages, and neutrophils), and airway responsiveness to aerosolized acetyl-β-methylcholine chloride (respiratory system resistance) were measured in wild-type and PAI-1-deficient mice. O3 significantly increased indices of lung injury, pulmonary inflammation, and airway responsiveness in wild-type and PAI-1-deficient mice. With the exception of MIP-2, which was significantly lower in PAI-1-deficient as compared to wild-type mice 24 h following cessation of exposure to O3, no other genotype-related differences occurred subsequent to O3 exposure. Thus, following acute exposure to O3, PAI-1 neither regulates pulmonary expression of IL-6 and KC nor functionally contributes to any of the pulmonary pathological sequelae that arise from the noxious effects of inhaled O3.
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Affiliation(s)
- Hamza S Elkhidir
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Jeremy B Richards
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, College of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Kevin R Cromar
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York
| | - Cynthia S Bell
- Division of Nephrology, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Roger E Price
- Comparative Pathology Laboratory, Center for Comparative Medicine, Baylor College of Medicine, Houston, Texas
| | - Constance L Atkins
- Division of Pulmonary Medicine, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Chantal Y Spencer
- Section of Pediatric Pulmonology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Farhan Malik
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Amy L Alexander
- Pediatric Research Center, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Katherine J Cockerill
- Pediatric Research Center, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Ikram U Haque
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
| | - Richard A Johnston
- Division of Critical Care Medicine, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas Pediatric Research Center, Department of Pediatrics, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas Department of Integrative Biology and Pharmacology, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas
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23
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High M, Cho HY, Marzec J, Wiltshire T, Verhein KC, Caballero MT, Acosta PL, Ciencewicki J, McCaw ZR, Kobzik L, Miller-DeGraff L, Gladwell W, Peden DB, Serra ME, Shi M, Weinberg C, Suzuki O, Wang X, Bell DA, Polack FP, Kleeberger SR. Determinants of host susceptibility to murine respiratory syncytial virus (RSV) disease identify a role for the innate immunity scavenger receptor MARCO gene in human infants. EBioMedicine 2016; 11:73-84. [PMID: 27554839 PMCID: PMC5049919 DOI: 10.1016/j.ebiom.2016.08.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 08/02/2016] [Accepted: 08/05/2016] [Indexed: 11/29/2022] Open
Abstract
Background Respiratory syncytial virus (RSV) is the global leading cause of lower respiratory tract infection in infants. Nearly 30% of all infected infants develop severe disease including bronchiolitis, but susceptibility mechanisms remain unclear. Methods We infected a panel of 30 inbred strains of mice with RSV and measured changes in lung disease parameters 1 and 5 days post-infection and they were used in genome-wide association (GWA) studies to identify quantitative trait loci (QTL) and susceptibility gene candidates. Findings GWA identified QTLs for RSV disease phenotypes, and the innate immunity scavenger receptor Marco was a candidate susceptibility gene; targeted deletion of Marco worsened murine RSV disease. We characterized a human MARCO promoter SNP that caused loss of gene expression, increased in vitro cellular response to RSV infection, and associated with increased risk of disease severity in two independent populations of children infected with RSV. Interpretation Translational integration of a genetic animal model and in vitro human studies identified a role for MARCO in human RSV disease severity. Because no RSV vaccines are approved for clinical use, genetic studies have implications for diagnosing individuals who are at risk for severe RSV disease, and disease prevention strategies (e.g. RSV antibodies). In a panel of inbred strains of mice, RSV disease phenotypes were characterized that resemble those in human disease. We identified Marco as a susceptibility gene, and a human MARCO mutation increased risk of disease severity in children. These studies have implications for diagnosing individuals who are at risk for severe RSV disease and prevent disease.
RSV disease is the primary global cause for hospitalization one year after birth but the causes of differential RSV disease severity are not understood. We show that RSV disease phenotypes vary significantly between inbred strains of mice, and resemble those in human disease. We used genetic approaches to identify and validate the innate immunity gene Marco as a host susceptibility determinant for murine RSV disease. We then characterized a loss of function polymorphism in human MARCO that increases risk of severe RSV disease risk in infants. Results have important implications for identifying genetic risk factors for severe RSV disease.
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Affiliation(s)
- Monica High
- Immunity, Inflammation, and Diseases Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Hye-Youn Cho
- Immunity, Inflammation, and Diseases Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Jacqui Marzec
- Immunity, Inflammation, and Diseases Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Tim Wiltshire
- Division of Pharmacotherapy and Experimental Therapeutics, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, USA
| | - Kirsten C Verhein
- Immunity, Inflammation, and Diseases Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | | | - Patricio L Acosta
- Fundación INFANT, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Buenos Aires, Argentina
| | - Jonathan Ciencewicki
- Immunity, Inflammation, and Diseases Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Zackary R McCaw
- Immunity, Inflammation, and Diseases Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Lester Kobzik
- Department of Environmental Health, Harvard University School of Public Health, Boston, MA, USA
| | - Laura Miller-DeGraff
- Immunity, Inflammation, and Diseases Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Wes Gladwell
- Immunity, Inflammation, and Diseases Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - David B Peden
- Center for Environmental Medicine, Asthma and Lung Biology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | | | - Min Shi
- Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Clarice Weinberg
- Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Oscar Suzuki
- Division of Pharmacotherapy and Experimental Therapeutics, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, USA
| | - Xuting Wang
- Genome Integrity & Structural Biology Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Douglas A Bell
- Genome Integrity & Structural Biology Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Fernando P Polack
- Fundación INFANT, Buenos Aires, Argentina; Department of Pediatrics, Vanderbilt University, Nashville, TN, USA.
| | - Steven R Kleeberger
- Immunity, Inflammation, and Diseases Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA.
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24
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Zhang M, Fei X, Zhang GQ, Zhang PY, Li F, Bao WP, Zhang YY, Zhou X. Role of neutralizing anti-murine interleukin-17A monoclonal antibody on chronic ozone-induced airway inflammation in mice. Biomed Pharmacother 2016; 83:247-256. [PMID: 27380433 DOI: 10.1016/j.biopha.2016.06.041] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 06/15/2016] [Accepted: 06/20/2016] [Indexed: 12/19/2022] Open
Abstract
Exposure to ozone has led to airway inflammation and airway hyperresponsiveness, which potential mechanisms relate to ozone-induced oxidative stress. IL-17 is a growing target for autoimmune and inflammatory diseases. The aim of the study was to examine the inhibitory effects of anti-murine interleukin-17A monoclonal antibody (IL-17mAb) on adverse effects of ozone which are noted above. After C57/BL6 mice were exposed to ozone (2.5ppm; 3h) for 12 times over 6 weeks, IL-17mAb, PBS was intraperitoneally injected into mice 1h after ozone or air exposure for 6 weeks and mice were studied 24h after final exposure, monitoring bronchial responsiveness, airway inflammatory cells, lung histology, levels of neutrophil-related chemokine and proinflammatory cytokines in bronchoalveolar lavage (BAL) fluid and serum, the expression of IL-17A mRNA and protein, glucocorticoid receptors (GR), and the phosphorylation of p38MAPK in lung tissues. The administration of IL-17mAb reduced the ozone-induced increases in total cells, especially neutrophils; decreased levels of cytokines, including IL-8 in BAL fluid, IL-8 and IL-17A in serum; mitigated the severity of airway hyperresponsiveness; attenuated lung inflammation scores and histologic analysis confirmed the suppression of lung inflammation, compared with the administration of a control PBS. Exposure to ozone results in increases in IL-17A production rate, mRNA and protein levels of IL-17A and the protein level of GR. These effects were halted and reversed by IL-17mAb treatment. Furthermore, IL-17mAb also reduced the phosphorylation of p38MAPK. Therefore, we conclude that IL-17mAb may be a useful therapy in ozone-related diseases, including COPD.
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Affiliation(s)
- Min Zhang
- Department of Respiratory Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xia Fei
- Department of Respiratory Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Guo-Qing Zhang
- Department of Respiratory Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Peng-Yu Zhang
- Department of Respiratory Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Feng Li
- Department of Respiratory Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Wu-Ping Bao
- Department of Respiratory Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Ying-Ying Zhang
- Department of Respiratory Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xin Zhou
- Department of Respiratory Medicine, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, China.
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25
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Ciencewicki JM, Verhein KC, Gerrish K, McCaw ZR, Li J, Bushel PR, Kleeberger SR. Effects of mannose-binding lectin on pulmonary gene expression and innate immune inflammatory response to ozone. Am J Physiol Lung Cell Mol Physiol 2016; 311:L280-91. [PMID: 27106289 DOI: 10.1152/ajplung.00205.2015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 04/20/2016] [Indexed: 02/07/2023] Open
Abstract
Ozone is a common, potent oxidant pollutant in industrialized nations. Ozone exposure causes airway hyperreactivity, lung hyperpermeability, inflammation, and cell damage in humans and laboratory animals, and exposure to ozone has been associated with exacerbation of asthma, altered lung function, and mortality. The mechanisms of ozone-induced lung injury and differential susceptibility are not fully understood. Ozone-induced lung inflammation is mediated, in part, by the innate immune system. We hypothesized that mannose-binding lectin (MBL), an innate immunity serum protein, contributes to the proinflammatory events caused by ozone-mediated activation of the innate immune system. Wild-type (Mbl(+/+)) and MBL-deficient (Mbl(-/-)) mice were exposed to ozone (0.3 ppm) for up to 72 h, and bronchoalveolar lavage fluid was examined for inflammatory markers. Mean numbers of eosinophils and neutrophils and levels of the neutrophil attractants C-X-C motif chemokines 2 [Cxcl2 (major intrinsic protein 2)] and 5 [Cxcl5 (limb expression, LIX)] in the bronchoalveolar lavage fluid were significantly lower in Mbl(-/-) than Mbl(+/+) mice exposed to ozone. Using genome-wide mRNA microarray analyses, we identified significant differences in transcript response profiles and networks at baseline [e.g., nuclear factor erythroid-related factor 2 (NRF2)-mediated oxidative stress response] and after exposure (e.g., humoral immune response) between Mbl(+/+) and Mbl(-/-) mice. The microarray data were further analyzed to discover several informative differential response patterns and subsequent gene sets, including the antimicrobial response and the inflammatory response. We also used the lists of gene transcripts to search the LINCS L1000CDS(2) data sets to identify agents that are predicted to perturb ozone-induced changes in gene transcripts and inflammation. These novel findings demonstrate that targeted deletion of Mbl caused differential levels of inflammation-related gene sets at baseline and after exposure to ozone and significantly reduced pulmonary inflammation, thus indicating an important innate immunomodulatory role of the gene in this model.
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Affiliation(s)
- Jonathan M Ciencewicki
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
| | - Kirsten C Verhein
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
| | - Kevin Gerrish
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina; and
| | - Zachary R McCaw
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
| | - Jianying Li
- Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
| | - Pierre R Bushel
- Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
| | - Steven R Kleeberger
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina;
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26
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Mishra V, DiAngelo SL, Silveyra P. Sex-specific IL-6-associated signaling activation in ozone-induced lung inflammation. Biol Sex Differ 2016; 7:16. [PMID: 26949510 PMCID: PMC4779258 DOI: 10.1186/s13293-016-0069-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Accepted: 02/25/2016] [Indexed: 01/10/2023] Open
Abstract
Background Acute ozone (O3) exposure has known deleterious effects on the respiratory system and has been linked with respiratory disease and infection. Inflammatory lung disease induced by air pollution has demonstrated greater severity and poorer prognosis in women vs. men. Both severe damage to the bronchial-alveolar epithelium and malfunctioning of bronchial-blood barrier have been largely attributed to the pathobiology of O3-induced inflammatory response, but the associated mechanisms in the male and female lung remain unknown. Methods Here, we investigated sex-based differential regulation of lung interleukin-6 (IL-6) and its downstream signaling pathways JAK2/STAT3 and AKT1/NF-κB in response to O3 exposure in a mouse model. We exposed male and female mice (in different stages of the estrous cycle) to 2 ppm of O3 or filtered air (FA) for 3 h, and we harvested lung tissue for protein expression analysis by Western blot. Results We found significant up-regulation of IL-6 and IL-6R in females and IL-6 in males in response to O3 vs. FA. Ozone exposure induced a significant increase in STAT3-Y705 phosphorylation in both females and males. Males exposed to O3 had decreased levels of JAK2, but increased JAK2 (Y1007+Y1008) phosphorylation, while females exposed to O3 showed significant up-regulation of both proteins. Both NF-κB (p105/p50) and AKT1 protein levels were significantly increased only in females exposed to O3. In addition, females exposed to O3 during proestrus displayed increased expression of selected genes when compared to females exposed to O3 in other estrous cycle stages. Conclusions Together, our observations indicate a sex-based and estrous cycle-dependent differential lung inflammatory response to O3 and involvement of two converging JAK2/STAT3 and AKT1/NF-κB pathways. To our knowledge, this is the first study specifically addressing the impact of the estrous cycle in O3-associated lung inflammatory pathways. Electronic supplementary material The online version of this article (doi:10.1186/s13293-016-0069-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Vikas Mishra
- Department of Pediatrics, The Pennsylvania State University College of Medicine, 500 University Drive, H085, Hershey, PA 17033 USA
| | - Susan L DiAngelo
- Department of Pediatrics, The Pennsylvania State University College of Medicine, 500 University Drive, H085, Hershey, PA 17033 USA
| | - Patricia Silveyra
- Department of Pediatrics, The Pennsylvania State University College of Medicine, 500 University Drive, H085, Hershey, PA 17033 USA ; Department of Biochemistry and Molecular Biology, The Pennsylvania State University College of Medicine, Hershey, PA 17033 USA
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27
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Che L, Jin Y, Zhang C, Lai T, Zhou H, Xia L, Tian B, Zhao Y, Liu J, Wu Y, Wu Y, Du J, Li W, Ying S, Chen Z, Shen H. Ozone-induced IL-17A and neutrophilic airway inflammation is orchestrated by the caspase-1-IL-1 cascade. Sci Rep 2016; 6:18680. [PMID: 26739627 PMCID: PMC4703985 DOI: 10.1038/srep18680] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 11/23/2015] [Indexed: 01/22/2023] Open
Abstract
Ozone is a common environmental air pollutant leading to respiratory illness. The mechanisms regulating ozone-induced airway inflammation remain poorly understood. We hypothesize that ozone-triggered inflammasome activation and interleukin (IL)-1 production regulate neutrophilic airway inflammation through IL-17A. Pulmonary neutrophilic inflammation was induced by extended (72 h) low-dose (0.7 ppm) exposure to ozone. IL-1 receptor 1 (Il1r1)−/−, Il17a−/− mice and the caspase-1 inhibitor acetyl-YVAD-chloromethylketone (Ac-YVAD-cmk) were used for in vivo studies. Cellular inflammation and protein levels in bronchial alveolar lavage fluid (BALF), cytokines, and IL-17A-producing γδT-cells, as well as mitochondrial reactive oxygen species (ROS), mitochondrial DNA (mtDNA) release, and inflammasome activation in lung macrophages were analyzed. Ozone-induced neutrophilic airway inflammation, accompanied an increased production of IL-1β, IL-18, IL-17A, Granulocyte-colony stimulating factor (G-CSF), Interferon-γ inducible protein 10 (IP-10) and BALF protein in the lung. Ozone-induced IL-17A production was predominantly in γδT-cells, and Il17a-knockout mice exhibited reduced airway inflammation. Lung macrophages from ozone-exposed mice exhibited higher levels of mitochondrial ROS, enhanced cytosolic mtDNA, increased caspase-1 activation, and higher production of IL-1β. Il1r1-knockout mice or treatment with Ac-YVAD-cmk decreased the IL-17A production and subsequent airway inflammation. Taken together, we demonstrate that ozone-induced IL-17A and neutrophilic airway inflammation is orchestrated by the caspase-1-IL-1 cascade.
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Affiliation(s)
- Luanqing Che
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Yan Jin
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China.,Department of Respiratory Diseases, Taizhou Municipal Hospital, Taizhou, Zhejiang 318000, China
| | - Chao Zhang
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Tianwen Lai
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Hongbin Zhou
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Lixia Xia
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Baoping Tian
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Yun Zhao
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Juan Liu
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Yinfang Wu
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Yanping Wu
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Jie Du
- Beijing Anzhen Hospital, Capital Medical University, Key Laboratory of Remodeling-Related Cardiovascular Diseases, The Ministry of Education, Beijing Institute of Heart, Lung, and Blood Vessel Diseases, Beijing 100029, China
| | - Wen Li
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Songmin Ying
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Zhihua Chen
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China
| | - Huahao Shen
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, China.,State Key Laboratory of Respiratory Diseases, Guangzhou, Guangdong 510120, China
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Lambert JA, Song W. Ozone-induced airway hyperresponsiveness: roles of ROCK isoforms. Am J Physiol Lung Cell Mol Physiol 2015; 309:L1394-7. [PMID: 26519207 DOI: 10.1152/ajplung.00353.2015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 10/30/2015] [Indexed: 12/16/2022] Open
Abstract
Acute ozone (O3) inhalation has been shown to cause airway and pulmonary epithelial injury with accompanying inflammation responses. Robust evidence exists that O3 induces airway hyperresponsiveness (AHR) in humans and in animal models. Several pathways exist that culminate in airway smooth muscle contraction, but the mechanism(s) by which O3 elicits AHR are unclear. Here, we review the recent report by Kasahara et al. (Kasahara DI, Mathews JA, Park CY, Cho Y, Hunt G, Wurmbrand AP, Liao JK, Shore SA. Am J Physiol Lung Cell Mol Physiol 309: L736-L746, 2015.) describing the role of two Rho kinase (ROCK) isoforms in O3-induced AHR utilizing a murine haploinsufficiency model. Compared with wild-type (WT) mice, the authors report that ROCK1(+/-) and ROCK2(+/-) mice exhibited significantly reduced AHR following acute exposure to O3. Additionally, WT mice treated with fasudil, an FDA-approved ROCK1/2 inhibitor, recapitulated reduction in AHR as seen in ROCK haplotypes. It was suggested that, although the two ROCK isoforms are both induced by Rho, they have different mechanisms by which they mediate O3-induced AHR: ROCK1 via hyaluronan signaling vs. ROCK2 acting downstream of inflammation at the level of airway smooth muscle contraction. These observations provide an important framework to develop novel ROCK-targeting therapies for acute O3-induced AHR.
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Affiliation(s)
- James A Lambert
- Department of Anesthesiology, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and Pulmonary Injury and Repair Center, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Weifeng Song
- Department of Anesthesiology, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and Pulmonary Injury and Repair Center, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
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29
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Razvi SS, Richards JB, Malik F, Cromar KR, Price RE, Bell CS, Weng T, Atkins CL, Spencer CY, Cockerill KJ, Alexander AL, Blackburn MR, Alcorn JL, Haque IU, Johnston RA. Resistin deficiency in mice has no effect on pulmonary responses induced by acute ozone exposure. Am J Physiol Lung Cell Mol Physiol 2015; 309:L1174-85. [PMID: 26386120 DOI: 10.1152/ajplung.00270.2015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 09/14/2015] [Indexed: 01/10/2023] Open
Abstract
Acute exposure to ozone (O3), an air pollutant, causes pulmonary inflammation, airway epithelial desquamation, and airway hyperresponsiveness (AHR). Pro-inflammatory cytokines-including IL-6 and ligands of chemokine (C-X-C motif) receptor 2 [keratinocyte chemoattractant (KC) and macrophage inflammatory protein (MIP)-2], TNF receptor 1 and 2 (TNF), and type I IL-1 receptor (IL-1α and IL-1β)-promote these sequelae. Human resistin, a pleiotropic hormone and cytokine, induces expression of IL-1α, IL-1β, IL-6, IL-8 (the human ortholog of murine KC and MIP-2), and TNF. Functional differences exist between human and murine resistin; yet given the aforementioned observations, we hypothesized that murine resistin promotes O3-induced lung pathology by inducing expression of the same inflammatory cytokines as human resistin. Consequently, we examined indexes of O3-induced lung pathology in wild-type and resistin-deficient mice following acute exposure to either filtered room air or O3. In wild-type mice, O3 increased bronchoalveolar lavage fluid (BALF) resistin. Furthermore, O3 increased lung tissue or BALF IL-1α, IL-6, KC, TNF, macrophages, neutrophils, and epithelial cells in wild-type and resistin-deficient mice. With the exception of KC, which was significantly greater in resistin-deficient compared with wild-type mice, no genotype-related differences in the other indexes existed following O3 exposure. O3 caused AHR to acetyl-β-methylcholine chloride (methacholine) in wild-type and resistin-deficient mice. However, genotype-related differences in airway responsiveness to methacholine were nonexistent subsequent to O3 exposure. Taken together, these data demonstrate that murine resistin is increased in the lungs of wild-type mice following acute O3 exposure but does not promote O3-induced lung pathology.
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Affiliation(s)
- Shehla S Razvi
- Division of Critical Care Medicine, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, Texas
| | - Jeremy B Richards
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Farhan Malik
- Division of Critical Care Medicine, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, Texas
| | - Kevin R Cromar
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo, New York
| | - Roger E Price
- Comparative Pathology Laboratory, Center for Comparative Medicine, Baylor College of Medicine, Houston, Texas
| | - Cynthia S Bell
- Division of Nephrology, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, Texas
| | - Tingting Weng
- Department of Biochemistry and Molecular Biology, The University of Texas Medical School at Houston, Houston, Texas
| | - Constance L Atkins
- Division of Pulmonary Medicine, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, Texas
| | - Chantal Y Spencer
- Pediatric Pulmonary Section, Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Katherine J Cockerill
- Pediatric Research Center, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, Texas
| | - Amy L Alexander
- Pediatric Research Center, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, Texas
| | - Michael R Blackburn
- Department of Biochemistry and Molecular Biology, The University of Texas Medical School at Houston, Houston, Texas
| | - Joseph L Alcorn
- Department of Biochemistry and Molecular Biology, The University of Texas Medical School at Houston, Houston, Texas; Pediatric Research Center, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, Texas; Division of Neonatal-Perinatal Medicine, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, Texas; and
| | - Ikram U Haque
- Division of Critical Care Medicine, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, Texas
| | - Richard A Johnston
- Division of Critical Care Medicine, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, Texas; Pediatric Research Center, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, Texas; Department of Integrative Biology and Pharmacology, The University of Texas Medical School at Houston, Houston, Texas
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30
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Kasahara DI, Mathews JA, Park CY, Cho Y, Hunt G, Wurmbrand AP, Liao JK, Shore SA. ROCK insufficiency attenuates ozone-induced airway hyperresponsiveness in mice. Am J Physiol Lung Cell Mol Physiol 2015; 309:L736-46. [PMID: 26276827 DOI: 10.1152/ajplung.00372.2014] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 08/09/2015] [Indexed: 11/22/2022] Open
Abstract
Ozone causes airway hyperresponsiveness (AHR) and pulmonary inflammation. Rho kinase (ROCK) is a key regulator of smooth muscle cell contraction and inflammatory cell migration. To determine the contribution of the two ROCK isoforms ROCK1 and ROCK2 to ozone-induced AHR, we exposed wild-type, ROCK1(+/-), and ROCK2(+/-) mice to air or ozone (2 ppm for 3 h) and evaluated mice 24 h later. ROCK1 or ROCK2 haploinsufficiency did not affect airway responsiveness in air-exposed mice but significantly reduced ozone-induced AHR, with a greater reduction in ROCK2(+/-) mice despite increased bronchoalveolar lavage (BAL) inflammatory cells in ROCK2(+/-) mice. Compared with wild-type mice, ozone-induced increases in BAL hyaluronan, a matrix protein implicated in ozone-induced AHR, were lower in ROCK1(+/-) but not ROCK2(+/-) mice. Ozone-induced increases in other inflammatory moieties reported to contribute to ozone-induced AHR (IL-17A, osteopontin, TNFα) were not different in wild-type vs. ROCK1(+/-) or ROCK2(+/-) mice. We also observed a dose-dependent reduction in ozone-induced AHR after treatment with the ROCK1/ROCK2 inhibitor fasudil, even though fasudil was administered after induction of inflammation. Ozone increased pulmonary expression of ROCK2 but not ROCK1 or RhoA. A ROCK2 inhibitor, SR3677, reduced contractile forces in primary human airway smooth muscle cells, confirming a role for ROCK2 in airway smooth muscle contraction. Our results demonstrate that ozone-induced AHR requires ROCK. Whereas ROCK1-dependent changes in hyaluronan may contribute to ROCK1's role in O3-induced AHR, the role of ROCK2 is downstream of inflammation, likely at the level of airway smooth muscle contraction.
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Affiliation(s)
- David I Kasahara
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts; and
| | - Joel A Mathews
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts; and
| | - Chan Y Park
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts; and
| | - Youngji Cho
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts; and
| | - Gabrielle Hunt
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts; and
| | - Allison P Wurmbrand
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts; and
| | - James K Liao
- Department of Medicine, University of Chicago, Chicago, Illinois
| | - Stephanie A Shore
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts; and
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31
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Verhein KC, McCaw Z, Gladwell W, Trivedi S, Bushel PR, Kleeberger SR. Novel Roles for Notch3 and Notch4 Receptors in Gene Expression and Susceptibility to Ozone-Induced Lung Inflammation in Mice. ENVIRONMENTAL HEALTH PERSPECTIVES 2015; 123:799-805. [PMID: 25658374 PMCID: PMC4529014 DOI: 10.1289/ehp.1408852] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 02/05/2015] [Indexed: 05/16/2023]
Abstract
BACKGROUND Ozone is a highly toxic air pollutant and global health concern. Mechanisms of genetic susceptibility to ozone-induced lung inflammation are not completely understood. We hypothesized that Notch3 and Notch4 are important determinants of susceptibility to ozone-induced lung inflammation. METHODS Wild-type (WT), Notch3 (Notch3-/-), and Notch4 (Notch4-/-) knockout mice were exposed to ozone (0.3 ppm) or filtered air for 6-72 hr. RESULTS Relative to air-exposed controls, ozone increased bronchoalveolar lavage fluid (BALF) protein, a marker of lung permeability, in all genotypes, but significantly greater concentrations were found in Notch4-/- compared with WT and Notch3-/- mice. Significantly greater mean numbers of BALF neutrophils were found in Notch3-/- and Notch4-/- mice compared with WT mice after ozone exposure. Expression of whole lung Tnf was significantly increased after ozone in Notch3-/- and Notch4-/- mice, and was significantly greater in Notch3-/- compared with WT mice. Statistical analyses of the transcriptome identified differentially expressed gene networks between WT and knockout mice basally and after ozone, and included Trim30, a member of the inflammasome pathway, and Traf6, an inflammatory signaling member. CONCLUSIONS These novel findings are consistent with Notch3 and Notch4 as susceptibility genes for ozone-induced lung injury, and suggest that Notch receptors protect against innate immune inflammation.
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Affiliation(s)
- Kirsten C Verhein
- Laboratory of Respiratory Biology, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health (NIH), Department of Health and Human Resources (DHHS), Research Triangle Park, North Carolina, USA
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Williams AS, Mathews JA, Kasahara DI, Wurmbrand AP, Chen L, Shore SA. Innate and ozone-induced airway hyperresponsiveness in obese mice: role of TNF-α. Am J Physiol Lung Cell Mol Physiol 2015; 308:L1168-77. [PMID: 25840999 DOI: 10.1152/ajplung.00393.2014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 04/01/2015] [Indexed: 01/06/2023] Open
Abstract
Innate airway hyperresponsiveness (AHR) and augmented responses to ozone, an asthma trigger, are characteristics of obese mice. Systemic inflammation, a condition of increased circulating concentrations of inflammatory moieties, occurs in obesity. We hypothesized that TNF-α, via its effects as a master effector of this systemic inflammation, regulates innate AHR and augmented responses to ozone in obese mice. Therefore, we examined pulmonary inflammation and airway responsiveness in unexposed or ozone-exposed (2 ppm for 3 h) lean wild-type and obese Cpe(fat) mice that were TNF-α sufficient or deficient. Cpe(fat) mice lack carboxypeptidase E, which regulates satiety. Compared with wild type, Cpe(fat) mice had elevated serum IL-17A, G-CSF, KC, MCP-1, IL-9, MIG, and leptin, indicating systemic inflammation. Despite reductions in most of these moieties in TNF-α-deficient vs. -sufficient Cpe(fat) mice, we observed no substantial difference in airway responsiveness in these two groups of mice. Ozone-induced increases in bronchoalveolar lavage (BAL) neutrophils and macrophages were lower, but ozone-induced AHR and increases in BAL hyaluronan, osteopontin, IL-13, and protein carbonyls, a marker of oxidative stress, were augmented in TNF-α-deficient vs. -sufficient Cpe(fat) mice. Our data indicate that TNF-α has an important role in promoting the systemic inflammation but not the innate AHR of obesity, suggesting that the systemic inflammation of obesity is not the major driver of this AHR. TNF-α is required for the augmented effects of acute ozone exposure on pulmonary inflammatory cell recruitment in obese mice, whereas TNF-α protects against ozone-induced AHR in obese mice, possibly by suppressing ozone-induced oxidative stress.
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Affiliation(s)
| | - Joel Andrew Mathews
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts
| | - David Itiro Kasahara
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts
| | | | - Lucas Chen
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts
| | - Stephanie Ann Shore
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts
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33
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Zhang P, Li F, Wiegman CH, Zhang M, Hong Y, Gong J, Chang Y, Zhang JJ, Adcock I, Chung KF, Zhou X. Inhibitory effect of hydrogen sulfide on ozone-induced airway inflammation, oxidative stress, and bronchial hyperresponsiveness. Am J Respir Cell Mol Biol 2015; 52:129-37. [PMID: 25010831 DOI: 10.1165/rcmb.2013-0415oc] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Exposure to ozone has been associated with airway inflammation, oxidative stress, and bronchial hyperresponsiveness. The goal of this study was to examine whether these adverse effects of ozone could be prevented or reversed by hydrogen sulfide (H2S) as a reducing agent. The H2S donor sodium (NaHS) (2 mg/kg) or vehicle (PBS) was intraperitoneally injected into mice 1 hour before and after 3-hour ozone (2.5 ppm) or air exposure, and the mice were studied 24 hours later. Preventive and therapeutic treatment with NaHS reduced the ozone-induced increases in the total cells, including neutrophils and macrophages; this treatment also reduced levels of cytokines, including TNF-α, chemokine (C-X-C motif) ligand 1, IL-6, and IL-1β levels in bronchial alveolar lavage fluid; inhibited bronchial hyperresponsiveness; and attenuated ozone-induced increases in total malondialdehyde in bronchoalveolar lavage fluid and decreases in the ratio of reduced glutathione/oxidized glutathione in the lung. Ozone exposure led to decreases in the H2S production rate and in mRNA and protein levels of cystathionine-β-synthetase and cystathionine-γ-lyase in the lung. These effects were prevented and reversed by NaHS treatment. Furthermore, NaHS prevented and reversed the phosphorylation of p38 mitogen-activated protein kinase and heat shock protein 27. H2S may have preventive and therapeutic value in the treatment of airway diseases that have an oxidative stress basis.
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34
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Liang L, Li F, Bao A, Zhang M, Chung KF, Zhou X. Activation of p38 mitogen-activated protein kinase in ovalbumin and ozone-induced mouse model of asthma. Respirology 2014; 18 Suppl 3:20-9. [PMID: 24188200 DOI: 10.1111/resp.12189] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 03/18/2013] [Accepted: 07/10/2013] [Indexed: 01/15/2023]
Abstract
BACKGROUND AND OBJECTIVE Ozone exposure worsens the development of allergen-induced asthma. The p38 mitogen-activated protein kinase (MAPK) pathway plays an important role in the development of the inflammatory response, airway hyperresponsiveness (AHR) and airway remodelling. In this study, the role of the p38 MAPK pathway on the effects of chronic ozone exposure in ovalbumin (OVA)-sensitized and -challenged mice was investigated. METHODS Mice were sensitized and challenged with OVA followed by ozone exposure. Dexamethasone (Dex) and SB239063, a p38 MAPK inhibitor, were used as preventive treatment. RESULTS Compared with OVA-challenged mice, ozone exposure of OVA-challenged mice led to enhanced recruitment of inflammatory cells in bronchoalveolar lavage fluid, increases in inflammation scores, collagen accumulation, bronchial wall thickness and messenger RNA levels of inflammatory cytokines, along with activation of p38 MAPK/HSP27 and downregulation of MAPK phosphatase-1 (MKP-1) in the lung tissue. Dex treatment partially attenuated lung inflammation, while the cotreatment of Dex and SB239063 effectively reduced lung inflammation, inhibited airway remodelling, inactivated p38 MAPK/HSP27 and upregulated MKP-1 in the lung tissue. CONCLUSIONS Ozone exposure aggravated airway inflammation, airway remodelling, activation of p38 MAPK and downregulation of MKP-1 in OVA-sensitized and -challenged mice, which was ineffectively controlled by corticosteroids. p38 MAPK activation is a likely pathway involved in corticosteroid insensitivity.
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Affiliation(s)
- Li Liang
- Department of Respiratory Medicine, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai, China
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35
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González-Guevara E, Martínez-Lazcano JC, Custodio V, Hernández-Cerón M, Rubio C, Paz C. Exposure to ozone induces a systemic inflammatory response: possible source of the neurological alterations induced by this gas. Inhal Toxicol 2014; 26:485-91. [DOI: 10.3109/08958378.2014.922648] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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36
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Mathews JA, Williams AS, Brand JD, Wurmbrand AP, Chen L, Ninin FMC, Si H, Kasahara DI, Shore SA. γδ T cells are required for pulmonary IL-17A expression after ozone exposure in mice: role of TNFα. PLoS One 2014; 9:e97707. [PMID: 24823369 PMCID: PMC4019643 DOI: 10.1371/journal.pone.0097707] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 04/22/2014] [Indexed: 11/21/2022] Open
Abstract
Ozone is an air pollutant that causes pulmonary symptoms. In mice, ozone exposure causes pulmonary injury and increases bronchoalveolar lavage macrophages and neutrophils. We have shown that IL-17A is important in the recruitment of neutrophils after subacute ozone exposure (0.3 ppm for 24–72 h). We hypothesized that γδ T cells are the main producers of IL-17A after subacute ozone. To explore this hypothesis we exposed wildtype mice and mice deficient in γδ T cells (TCRδ−/−) to ozone or room air. Ozone-induced increases in BAL macrophages and neutrophils were attenuated in TCRδ−/− mice. Ozone increased the number of γδ T cells in the lungs and increased pulmonary Il17a mRNA expression and the number of IL-17A+ CD45+ cells in the lungs and these effects were abolished in TCRδ−/− mice. Ozone-induced increases in factors downstream of IL-17A signaling, including G-CSF, IL-6, IP-10 and KC were also decreased in TCRδ−/− versus wildtype mice. Neutralization of IL-17A during ozone exposure in wildtype mice mimicked the effects of γδ T cell deficiency. TNFR2 deficiency and etanercept, a TNFα antagonist, also reduced ozone-induced increases in Il17a mRNA, IL-17A+ CD45+ cells and BAL G-CSF as well as BAL neutrophils. TNFR2 deficient mice also had decreased ozone-induced increases in Ccl20, a chemoattractant for IL-17A+ γδ T cells. Il17a mRNA and IL-17A+ γδ T cells were also lower in obese Cpefat versus lean WT mice exposed to subacute ozone, consistent with the reduced neutrophil recruitment observed in the obese mice. Taken together, our data indicate that pulmonary inflammation induced by subacute ozone requires γδ T cells and TNFα-dependent recruitment of IL-17A+ γδ T cells to the lung.
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MESH Headings
- Analysis of Variance
- Animals
- Bronchoalveolar Lavage
- DNA Primers/genetics
- Etanercept
- Flow Cytometry
- Immunoglobulin G
- Interleukin-17/metabolism
- Lung/drug effects
- Lung/immunology
- Macrophages/immunology
- Mice
- Mice, Knockout
- Neutrophils/immunology
- Ozone/toxicity
- Pneumonia/chemically induced
- Pneumonia/immunology
- Real-Time Polymerase Chain Reaction
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Receptors, Antigen, T-Cell, gamma-delta/metabolism
- Receptors, Tumor Necrosis Factor
- Receptors, Tumor Necrosis Factor, Type II
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
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Affiliation(s)
- Joel A. Mathews
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
- * E-mail:
| | - Alison S. Williams
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Jeffrey D. Brand
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Allison P. Wurmbrand
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Lucas Chen
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Fernanda MC. Ninin
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Huiqing Si
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - David I. Kasahara
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Stephanie A. Shore
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
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Sakai D, Makita Y, Masuno K, Fujiwara SI, Okazaki J, Wang PL. Local Hemostatic Effect of Aqueous Ozone in Cutting Wound Surface. J HARD TISSUE BIOL 2014. [DOI: 10.2485/jhtb.23.245] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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Fukui T, Masuno K, Makita Y, Fujiwara SI, Shiota G, Imamura Y, Shiba A, Wang PL. Antimicrobial Effects of Ozone Gel Against Periodontal Bacteria. J HARD TISSUE BIOL 2014. [DOI: 10.2485/jhtb.23.445] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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39
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Lee H, Kim EK, Kang SW, Kim JH, Hwang HJ, Kim TI. Effects of ozone exposure on the ocular surface. Free Radic Biol Med 2013; 63:78-89. [PMID: 23665308 DOI: 10.1016/j.freeradbiomed.2013.05.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Revised: 04/26/2013] [Accepted: 05/02/2013] [Indexed: 01/17/2023]
Abstract
Changes in the ocular surface induced by ozone have received limited research attention. Here, we investigate the effects of ozone exposure on the integrity of the ocular surface, the production of inflammatory cytokines in tears, and changes in mucin-secreting cells in a mouse model. In addition, ozone-induced nuclear factor-κB (NF-κB)-mediated inflammatory processes were evaluated in cultured human conjunctival epithelial cells. In vivo, ozone induced the breakdown of corneal epithelial integrity, decreased the number of mucin-secreting cells, and induced the production of inflammatory cytokines, without altering tear volume. In vitro, ozone exposure led to increases in NF-κB nuclear translocation, κB-dependent transcriptional activity, NF-κB inhibitor α (IκBα) proteolysis, and expression of phosphorylated IκBα (p-IκBα), but did not cause cytotoxicity or cellular apoptosis. In addition, ozone induced the expression of inflammatory cytokines, Toll-like receptors, and C-C chemokine receptors, but decreased the expression of mucins. Furthermore, inhibition of NF-κB with pyrrolidine dithiocarbamate before exposure of cultured human conjunctival epithelial cells to ozone prevented changes in IκBα and p-IκBα levels in association with a decrease in the levels of inflammatory cytokines. Therefore, we conclude that ozone exposure interferes with ocular surface integrity and induces inflammation involving NF-κB-mediated processes at the level (and/or upstream) of IκBα. Understanding the role of ozone in the initiation of inflammatory processes on the animal ocular surface and in cultured human conjunctival epithelial cells can help elucidate the pathogenesis of ocular surface damage and suggest protective strategies for preserving a healthy ocular surface against ozone exposure.
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Affiliation(s)
- Hun Lee
- The Institute of Vision Research, Department of Ophthalmology, and Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul 120-752, Korea
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40
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Kasahara DI, Williams AS, Benedito LA, Ranscht B, Kobzik L, Hug C, Shore SA. Role of the adiponectin binding protein, T-cadherin (cdh13), in pulmonary responses to subacute ozone. PLoS One 2013; 8:e65829. [PMID: 23755285 PMCID: PMC3675043 DOI: 10.1371/journal.pone.0065829] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 05/02/2013] [Indexed: 12/15/2022] Open
Abstract
Adiponectin, an adipose derived hormone with pleiotropic functions, binds to several proteins, including T-cadherin. We have previously reported that adiponectin deficient (Adipo(-/-)) mice have increased IL-17A-dependent neutrophil accumulation in their lungs after subacute exposure to ozone (0.3 ppm for 72 hrs). The purpose of this study was to determine whether this anti-inflammatory effect of adiponectin required adiponectin binding to T-cadherin. Wildtype, Adipo(-/-) , T-cadherin deficient (T-cad(-/-) ), and bideficient (Adipo(-/-)/T-cad(-/-) ) mice were exposed to subacute ozone or air. Compared to wildtype mice, ozone-induced increases in pulmonary IL-17A mRNA expression were augmented in T-cad(-/-) and Adipo(-/-) mice. Compared to T-cad(-/-) mice, there was no further increase in IL-17A in Adipo(-/-)/T-cad(-/-) mice, indicating that adiponectin binding to T-cadherin is required for suppression of ozone-induced IL-17A expression. Similar results were obtained for pulmonary mRNA expression of saa3, an acute phase protein capable of inducing IL-17A expression. Comparison of lung histological sections across genotypes also indicated that adiponectin attenuation of ozone-induced inflammatory lesions at bronchiolar branch points required T-cadherin. BAL neutrophils and G-CSF were augmented in T-cad(-/-) mice and further augmented in Adipo(-/-)/T-cad(-/-) mice. Taken together with previous observations indicating that augmentation of these moieties in ozone exposed Adipo(-/-) mice is partially IL-17A dependent, the results indicate that effects of T-cadherin deficiency on BAL neutrophils and G-CSF are likely secondary to changes in IL-17A, but that adiponectin also acts via T-cadherin independent pathways. Our results indicate that T-cadherin is required for the ability of adiponectin to suppress some but not all aspects of ozone-induced pulmonary inflammation.
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Affiliation(s)
- David I. Kasahara
- Department of Environmental Health, Harvard School of Public Health (HSPH), Boston, Massachusetts, United States of America
| | - Alison S. Williams
- Department of Environmental Health, Harvard School of Public Health (HSPH), Boston, Massachusetts, United States of America
| | - Leandro A. Benedito
- Department of Environmental Health, Harvard School of Public Health (HSPH), Boston, Massachusetts, United States of America
| | - Barbara Ranscht
- Department of Neurosciences, University of California San Diego, San Diego, California, United States of America
| | - Lester Kobzik
- Department of Environmental Health, Harvard School of Public Health (HSPH), Boston, Massachusetts, United States of America
| | - Christopher Hug
- Division of Pulmonary Medicine, Children's Hospital Boston, Harvard Medical School (HMS), Boston, Massachusetts, United States of America
| | - Stephanie A. Shore
- Department of Environmental Health, Harvard School of Public Health (HSPH), Boston, Massachusetts, United States of America
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Barreno RX, Richards JB, Schneider DJ, Cromar KR, Nadas AJ, Hernandez CB, Hallberg LM, Price RE, Hashmi SS, Blackburn MR, Haque IU, Johnston RA. Endogenous osteopontin promotes ozone-induced neutrophil recruitment to the lungs and airway hyperresponsiveness to methacholine. Am J Physiol Lung Cell Mol Physiol 2013; 305:L118-29. [PMID: 23666750 DOI: 10.1152/ajplung.00080.2013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Inhalation of ozone (O₃), a common environmental pollutant, causes pulmonary injury, pulmonary inflammation, and airway hyperresponsiveness (AHR) in healthy individuals and exacerbates many of these same sequelae in individuals with preexisting lung disease. However, the mechanisms underlying these phenomena are poorly understood. Consequently, we sought to determine the contribution of osteopontin (OPN), a hormone and a pleiotropic cytokine, to the development of O₃-induced pulmonary injury, pulmonary inflammation, and AHR. To that end, we examined indices of these aforementioned sequelae in mice genetically deficient in OPN and in wild-type, C57BL/6 mice 24 h following the cessation of an acute (3 h) exposure to filtered room air (air) or O₃ (2 parts/million). In wild-type mice, O₃ exposure increased bronchoalveolar lavage fluid (BALF) OPN, whereas immunohistochemical analysis demonstrated that there were no differences in the number of OPN-positive alveolar macrophages between air- and O₃-exposed wild-type mice. O₃ exposure also increased BALF epithelial cells, protein, and neutrophils in wild-type and OPN-deficient mice compared with genotype-matched, air-exposed controls. However, following O₃ exposure, BALF neutrophils were significantly reduced in OPN-deficient compared with wild-type mice. When airway responsiveness to inhaled acetyl-β-methylcholine chloride (methacholine) was assessed using the forced oscillation technique, O₃ exposure caused hyperresponsiveness to methacholine in the airways and lung parenchyma of wild-type mice, but not OPN-deficient mice. These results demonstrate that OPN is increased in the air spaces following acute exposure to O₃ and functionally contributes to the development of O₃-induced pulmonary inflammation and airway and lung parenchymal hyperresponsiveness to methacholine.
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Affiliation(s)
- Ramon X Barreno
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, The University of Texas Medical School at Houston, Houston, TX 77030, USA
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Exacerbated airway toxicity of environmental oxidant ozone in mice deficient in Nrf2. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:254069. [PMID: 23766849 PMCID: PMC3665255 DOI: 10.1155/2013/254069] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 03/29/2013] [Indexed: 12/20/2022]
Abstract
Ozone (O3) is a strong oxidant in air pollution that has harmful effects on airways and exacerbates respiratory disorders. The transcription factor Nrf2 protects airways from oxidative stress through antioxidant response element-bearing defense gene induction. The present study was designed to determine the role of Nrf2 in airway toxicity caused by inhaled O3 in mice. For this purpose, Nrf2-deficient (Nrf2(-/-)) and wild-type (Nrf2(+/+)) mice received acute and subacute exposures to O3. Lung injury was determined by bronchoalveolar lavage and histopathologic analyses. Oxidation markers and mucus hypersecretion were determined by ELISA, and Nrf2 and its downstream effectors were determined by RT-PCR and/or Western blotting. Acute and sub-acute O3 exposures heightened pulmonary inflammation, edema, and cell death more severely in Nrf2(-/-) mice than in Nrf2(+/+) mice. O3 caused bronchiolar and terminal bronchiolar proliferation in both genotypes of mice, while the intensity of compensatory epithelial proliferation, bronchial mucous cell hyperplasia, and mucus hypersecretion was greater in Nrf2(-/-) mice than in Nrf2(+/+) mice. Relative to Nrf2(+/+), O3 augmented lung protein and lipid oxidation more highly in Nrf2(-/-) mice. Results suggest that Nrf2 deficiency exacerbates oxidative stress and airway injury caused by the environmental pollutant O3.
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Williams AS, Mathews JA, Kasahara DI, Chen L, Wurmbrand AP, Si H, Shore SA. Augmented pulmonary responses to acute ozone exposure in obese mice: roles of TNFR2 and IL-13. ENVIRONMENTAL HEALTH PERSPECTIVES 2013; 121:551-7. [PMID: 23434795 PMCID: PMC3673194 DOI: 10.1289/ehp.1205880] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Accepted: 02/21/2013] [Indexed: 05/06/2023]
Abstract
BACKGROUND Acute ozone (O(3)) exposure results in greater inflammation and airway hyperresponsiveness (AHR) in obese versus lean mice. OBJECTIVES We examined the hypothesis that these augmented responses to O(3) are the result of greater signaling through tumor necrosis factor receptor 2 (TNFR2) and/or interleukin (IL)-13. METHODS We exposed lean wild-type (WT) and TNFR2-deficient (TNFR2(-/-)) mice, and obese Cpe(fat) and TNFR2-deficient Cpe(fat) mice (Cpe(fat)/TNFR2(-/-)), to O(3) (2 ppm for 3 hr) either with or without treatment with anti-IL-13 or left them unexposed. RESULTS O(3)-induced increases in baseline pulmonary mechanics, airway responsiveness, and cellular inflammation were greater in Cpe(fat) than in WT mice. In lean mice, TNFR2 deficiency ablated O(3)-induced AHR without affecting pulmonary inflammation; whereas in obese mice, TNFR2 deficiency augmented O(3)-induced AHR but reduced inflammatory cell recruitment. O(3) increased pulmonary expression of IL-13 in Cpe(fat) but not WT mice. Flow cytometry analysis of lung cells indicated greater IL-13-expressing CD(4+) cells in Cpe(fat) versus WT mice after O(3) exposure. In Cpe(fat) mice, anti-IL-13 treatment attenuated O(3)-induced increases in pulmonary mechanics and inflammatory cell recruitment, but did not affect AHR. These effects of anti-IL-13 treatment were not observed in Cpe(fat)/TNFR2(-/-) mice. There was no effect of anti-IL-13 treatment in WT mice. CONCLUSIONS Pulmonary responses to O(3) are not just greater, but qualitatively different, in obese versus lean mice. In particular, in obese mice, O(3) induces IL-13 and IL-13 synergizes with TNF via TNFR2 to exacerbate O(3)-induced changes in pulmonary mechanics and inflammatory cell recruitment but not AHR.
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Affiliation(s)
- Alison Suzanne Williams
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts 02115, USA
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Sunil VR, Vayas KN, Massa CB, Gow AJ, Laskin JD, Laskin DL. Ozone-induced injury and oxidative stress in bronchiolar epithelium are associated with altered pulmonary mechanics. Toxicol Sci 2013; 133:309-19. [PMID: 23492811 DOI: 10.1093/toxsci/kft071] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In these studies, we analyzed the effects of ozone on bronchiolar epithelium. Exposure of rats to ozone (2 ppm, 3 h) resulted in rapid (within 3 h) and persistent (up to 72 h) histological changes in the bronchiolar epithelium, including hypercellularity, loss of cilia, and necrotizing bronchiolitis. Perivascular edema and vascular congestion were also evident, along with a decrease in Clara cell secretory protein in bronchoalveolar lavage, which was maximal 24 h post-exposure. Ozone also induced the appearance of 8-hydroxy-2'-deoxyguanosine, Ym1, and heme oxygenase-1 in the bronchiolar epithelium. This was associated with increased expression of cleaved caspase-9 and beclin-1, indicating initiation of apoptosis and autophagy. A rapid and persistent increase in galectin-3, a regulator of epithelial cell apoptosis, was also observed. Following ozone exposure (3-24 h), increased expression of cyclooxygenase-2, inducible nitric oxide synthase, and arginase-1 was noted in bronchiolar epithelium. Ozone-induced injury and oxidative stress in bronchiolar epithelium were linked to methacholine-induced alterations in pulmonary mechanics. Thus, significant increases in lung resistance and elastance, along with decreases in lung compliance and end tidal volume, were observed at higher doses of methacholine. This indicates that ozone causes an increase in effective stiffness of the lung as a consequence of changes in the conducting airways. Collectively, these studies demonstrate that bronchiolar epithelium is highly susceptible to injury and oxidative stress induced by acute exposure to ozone; moreover, this is accompanied by altered lung functioning.
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Affiliation(s)
- Vasanthi R Sunil
- Department of Pharmacology & Toxicology, Rutgers University, Piscataway, New Jersey 08854, USA.
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45
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Howden R, Kleeberger SR. Genetic and Environmental Influences on Gas Exchange. Compr Physiol 2012; 2:2595-614. [DOI: 10.1002/cphy.c110060] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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46
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Zaidi A, Jelveh S, Mahmood J, Hill RP. Effects of lipopolysaccharide on the response of C57BL/6J mice to whole thorax irradiation. Radiother Oncol 2012; 105:341-9. [PMID: 22985778 DOI: 10.1016/j.radonc.2012.08.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 06/28/2012] [Accepted: 08/11/2012] [Indexed: 01/15/2023]
Abstract
BACKGROUND AND PURPOSE Inflammatory and fibrogenic processes play a crucial role in the radiation-induced injury in the lung. The aim of the present study was to examine whether additive LPS exposure in the lung (to simulate respiratory infection) would affect pneumonitis or fibrosis associated with lung irradiation. MATERIAL AND METHODS Wildtype C57Bl/6J (WT-C57) and TNFα, TNFR1 and TNFR2 knockout ((-/-)) mice, in C57Bl/6J background, were given whole thorax irradiation (10 Gy) with or without post-irradiation intratracheal administration of LPS (50μg/mice). Functional deficit was examined by measuring breathing rate at various times after treatment. Real-time Reverse Transcription-Polymerase Chain Reaction (RT-PCR) and immunohistochemistry were used to analyze the protein expression and m-RNA of Interleukin-1 alpha (IL-1α), Interleukin-1 beta (IL-1β), Interleukin-6 (IL-6), Tumour Necrosis Factor alpha (TNFα) and Transforming Growth Factor beta (TGFβ) in the lung at various times after treatment. Inflammatory cells were detected by Mac-3 (macrophages) and Toluidine Blue (mast cells) staining. Collagen content was estimated by hydroxyproline (total collagen) and Sircol assay (soluble collagen). Levels of oxidative damage were assessed by 8-hydroxy-2-deoxyguanosine (8-OHdG) staining. RESULTS LPS exposure significantly attenuated the breathing rate increases following irradiation of WT-C57, TNFR1(-/-) and TNFR2(-/-)mice and to a lesser extent in TNFα(-/-) mice. Collagen content was significantly reduced after LPS treatment in WT-C57, TNFR1(-/-) and TNFα(-/-) mice and there was a trend in TNFR2(-/-) mice. Similarly there were lower levels of inflammatory cells and cytokines in the LPS treated mice. CONCLUSIONS This study reveals a mitigating effect of early exposure to LPS on injury caused by irradiation on lungs of C57Bl mice. The results suggest that immediate infection post irradiation may not impact lung response negatively in radiation-accident victims, however, further studies are required in different animal models, and with specific infectious agents, to confirm and extend our findings.
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Affiliation(s)
- Asif Zaidi
- Ontario Cancer Institute, Toronto, Ontario, Canada
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47
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Zhu M, Williams AS, Chen L, Wurmbrand AP, Williams ES, Shore SA. Role of TNFR1 in the innate airway hyperresponsiveness of obese mice. J Appl Physiol (1985) 2012; 113:1476-85. [PMID: 22984249 DOI: 10.1152/japplphysiol.00588.2012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The purpose of this study was to examine the role of tumor necrosis factor receptor 1 (TNFR1) in the airway hyperresponsiveness characteristic of obese mice. Airway responsiveness to intravenous methacholine was measured using the forced oscillation technique in obese Cpe(fat) mice that were either sufficient or genetically deficient in TNFR1 (Cpe(fat) and Cpe(fat)/TNFR1(-/-) mice) and in lean mice that were either sufficient or genetically deficient in TNFR1 [wild-type (WT) and TNFR1(-/-) mice]. Compared with lean WT mice, Cpe(fat) mice exhibited airway hyperresponsiveness. Airway hyperresponsives was also greater in Cpe(fat)/TNFR1(-/-) than in Cpe(fat) mice. Compared with WT mice, Cpe(fat) mice had increases in bronchoalveolar lavage fluid concentrations of several inflammatory moieties including eotaxin, IL-9, IP-10, KC, MIG, and VEGF. These factors were also significantly elevated in Cpe(fat)/TNFR1(-/-) vs. TNFR1(-/-) mice. Additional moieties including IL-13 were also elevated in Cpe(fat)/TNFR1(-/-) vs. TNFR1(-/-) mice but not in Cpe(fat) vs. WT mice. IL-17A mRNA expression was greater in Cpe(fat)/TNFR1(-/-) vs. Cpe(fat) mice and in TNFR1(-/-) vs. WT mice. Analysis of serum indicated that obesity resulted in systemic as well as pulmonary inflammation, but TNFR1 deficiency had little effect on this systemic inflammation. Our results indicate that TNFR1 is protective against the airway hyperresponsiveness associated with obesity and suggest that effects on pulmonary inflammation may be contributing to this protection.
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Affiliation(s)
- Ming Zhu
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts 02115, USA
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48
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Gardi C, Valacchi G. Cigarette smoke and ozone effect on murine inflammatory responses. Ann N Y Acad Sci 2012; 1259:104-11. [DOI: 10.1111/j.1749-6632.2012.06605.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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49
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Sunil VR, Patel-Vayas K, Shen J, Laskin JD, Laskin DL. Classical and alternative macrophage activation in the lung following ozone-induced oxidative stress. Toxicol Appl Pharmacol 2012; 263:195-202. [PMID: 22727909 DOI: 10.1016/j.taap.2012.06.009] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 06/11/2012] [Accepted: 06/12/2012] [Indexed: 01/02/2023]
Abstract
Ozone is a pulmonary irritant known to cause oxidative stress, inflammation and tissue injury. Evidence suggests that macrophages play a role in the pathogenic response; however, their contribution depends on the mediators they encounter in the lung which dictate their function. In these studies we analyzed the effects of ozone-induced oxidative stress on the phenotype of alveolar macrophages (AM). Exposure of rats to ozone (2 ppm, 3h) resulted in increased expression of 8-hydroxy-2'-deoxyguanosine (8-OHdG), as well as heme oxygenase-1 (HO-1) in AM. Whereas 8-OHdG was maximum at 24h, expression of HO-1 was biphasic increasing after 3h and 48-72 h. Cleaved caspase-9 and beclin-1, markers of apoptosis and autophagy, were also induced in AM 24h post-ozone. This was associated with increased bronchoalveolar lavage protein and cells, as well as matrix metalloproteinase (MMP)-2 and MMP-9, demonstrating alveolar epithelial injury. Ozone intoxication resulted in biphasic activation of the transcription factor, NFκB. This correlated with expression of monocyte chemotactic protein-1, inducible nitric oxide synthase and cyclooxygenase-2, markers of proinflammatory macrophages. Increases in arginase-1, Ym1 and galectin-3 positive anti-inflammatory/wound repair macrophages were also observed in the lung after ozone inhalation, beginning at 24h (arginase-1, Ym1), and persisting for 72 h (galectin-3). This was associated with increased expression of pro-surfactant protein-C, a marker of Type II cell proliferation and activation, important steps in wound repair. These data suggest that both proinflammatory/cytotoxic and anti-inflammatory/wound repair macrophages are activated early in the response to ozone-induced oxidative stress and tissue injury.
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Affiliation(s)
- Vasanthi R Sunil
- Department of Pharmacology and Toxicology, Rutgers University, Ernest Mario School of Pharmacy, Piscataway, NJ 08854, USA.
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Kasahara DI, Kim HY, Williams AS, Verbout NG, Tran J, Si H, Wurmbrand AP, Jastrab J, Hug C, Umetsu DT, Shore SA. Pulmonary inflammation induced by subacute ozone is augmented in adiponectin-deficient mice: role of IL-17A. THE JOURNAL OF IMMUNOLOGY 2012; 188:4558-67. [PMID: 22474022 DOI: 10.4049/jimmunol.1102363] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Pulmonary responses to ozone, a common air pollutant, are augmented in obese individuals. Adiponectin, an adipose-derived hormone that declines in obesity, has regulatory effects on the immune system. To determine the role of adiponectin in the pulmonary inflammation induced by extended (48-72 h) low-dose (0.3 parts per million) exposure to ozone, adiponectin-deficient (Adipo(-/-)) and wild-type mice were exposed to ozone or to room air. In wild-type mice, ozone exposure increased total bronchoalveolar lavage (BAL) adiponectin. Ozone-induced lung inflammation, including increases in BAL neutrophils, protein (an index of lung injury), IL-6, keratinocyte-derived chemokine, LPS-induced CXC chemokine, and G-CSF were augmented in Adipo(-/-) versus wild-type mice. Ozone also increased IL-17A mRNA expression to a greater extent in Adipo(-/-) versus wild-type mice. Moreover, compared with control Ab, anti-IL-17A Ab attenuated ozone-induced increases in BAL neutrophils and G-CSF in Adipo(-/-) but not in wild-type mice, suggesting that IL-17A, by promoting G-CSF release, contributed to augmented neutrophilia in Adipo(-/-) mice. Flow cytometric analysis of lung cells revealed that the number of CD45(+)/F4/80(+)/IL-17A(+) macrophages and γδ T cells expressing IL-17A increased after ozone exposure in wild-type mice and further increased in Adipo(-/-) mice. The IL-17(+) macrophages were CD11c(-) (interstitial macrophages), whereas CD11c(+) macrophages (alveolar macrophages) did not express IL-17A. Taken together, the data are consistent with the hypothesis that adiponectin protects against neutrophil recruitment induced by extended low-dose ozone exposure by inhibiting the induction and/or recruitment of IL-17A in interstitial macrophages and/or γδ T cells.
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Affiliation(s)
- David I Kasahara
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115, USA
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