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Schwab AD, Wyatt TA, Nelson AJ, Gleason A, Gaurav R, Romberger DJ, Poole JA. Lung-delivered IL-10 therapy elicits beneficial effects via immune modulation in organic dust exposure-induced lung inflammation. J Immunotoxicol 2024; 21:2332172. [PMID: 38563602 PMCID: PMC11137733 DOI: 10.1080/1547691x.2024.2332172] [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: 01/03/2024] [Accepted: 03/14/2024] [Indexed: 04/04/2024] Open
Abstract
Efficacious therapeutic options capable of resolving inflammatory lung disease associated with environmental and occupational exposures are lacking. This study sought to determine the preclinical therapeutic potential of lung-delivered recombinant interleukin (IL)-10 therapy following acute organic dust exposure in mice. Here, C57BL/6J mice were intratracheally instilled with swine confinement organic dust extract (ODE) (12.5%, 25%, 50% concentrations) with IL-10 (1 μg) treatment or vehicle control intratracheally-administered three times: 5 hr post-exposure and then daily for 2 days. The results showed that IL-10 treatment reduced ODE (25%)-induced weight loss by 66% and 46% at Day 1 and Day 2 post-exposure, respectively. IL-10 treatment reduced ODE (25%, 50%)-induced lung levels of TNFα (-76%, -83% [reduction], respectively), neutrophil chemoattractant CXCL1 (-51%, -60%), and lavage fluid IL-6 (-84%, -89%). IL-10 treatment reduced ODE (25%, 50%)-induced lung neutrophils (-49%, -70%) and recruited CD11cintCD11b+ monocyte-macrophages (-49%, -70%). IL-10 therapy reduced ODE-associated expression of antigen presentation (MHC Class II, CD80, CD86) and inflammatory (Ly6C) markers and increased anti-inflammatory CD206 expression on CD11cintCD11b+ cells. ODE (12.5%, 25%)-induced lung pathology was also reduced with IL-10 therapy. In conclusion, the studies here showed that short-term, lung-delivered IL-10 treatment induced a beneficial response in reducing inflammatory consequences (that were also associated with striking reduction in recruited monocyte-macrophages) following acute complex organic dust exposure.
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Affiliation(s)
- Aaron D. Schwab
- Division of Allergy and Immunology, Critical Care & Sleep, Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE
| | - Todd A. Wyatt
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE
- Division of Pulmonary, Critical Care & Sleep, Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE
- Department of Environmental, Agricultural and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE
| | - Amy J. Nelson
- Division of Allergy and Immunology, Critical Care & Sleep, Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE
| | - Angela Gleason
- Division of Allergy and Immunology, Critical Care & Sleep, Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE
| | - Rohit Gaurav
- Division of Allergy and Immunology, Critical Care & Sleep, Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE
| | - Debra J. Romberger
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE
- Division of Pulmonary, Critical Care & Sleep, Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE
| | - Jill A. Poole
- Division of Allergy and Immunology, Critical Care & Sleep, Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE
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Poole JA, Zamora-Sifuentes JL, De Las Vecillas L, Quirce S. Respiratory Diseases Associated With Organic Dust Exposure. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2024; 12:1960-1971. [PMID: 38423290 PMCID: PMC11316665 DOI: 10.1016/j.jaip.2024.02.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/13/2024] [Accepted: 02/19/2024] [Indexed: 03/02/2024]
Abstract
Organic dusts are complex bioaerosol mixtures comprised of dust and par ticulate matter of organic origin. These include components from bacteria, fungi, pollen, and viruses to fragments of animals and plants commonplace to several environmental/occupational settings encompassing agriculture/farming, grain processing, waste/recycling, textile, cotton, woodworking, bird breeding, and more. Organic dust exposures are linked to development of chronic bronchitis, chronic obstructive pulmonary disease, asthma, asthma-like syndrome, byssinosis, hypersensitivity pneumonitis, and idiopathic pulmonary fibrosis. Risk factors of disease development include cumulative dust exposure, smoking, atopy, timing/duration, and nutritional factors. The immunopathogenesis predominantly involves Toll-like receptor signaling cascade, T-helper 1/T-helper 17 lymphocyte responses, neutrophil influx, and potentiation of manifestations associated with allergy. The true prevalence of airway disease directly attributed to organic dust, especially in a workplace setting, remains challenging. Diagnostic confirmation can be difficult and complicated by hesitancy from workers to seek medical care, driven by fears of potential labor-related consequence. Clinical respiratory and systemic presentations coupled with allergy testing, lung function patterns of obstructive versus restrictive disease, and radiological characteristics are typically utilized to delineate these various organic dust-associated respiratory diseases. Prevention, risk reduction, and management primarily focus on reducing exposure to the offending dust, managing symptoms, and preventing disease progression.
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Affiliation(s)
- Jill A Poole
- Division of Allergy & Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Neb.
| | - Jose L Zamora-Sifuentes
- Division of Allergy & Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Neb
| | | | - Santiago Quirce
- Department of Allergy, La Paz University of Hospital, IdiPAZ, Madrid, Spain; CIBER de Enfermedades Respiratorias (CIBERES), Madrid, Spain
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Bauer CD, Mosley DD, Samuelson DR, Poole JA, Smith DR, Knoell DL, Wyatt TA. Zinc Protects against Swine Barn Dust-Induced Cilia Slowing. Biomolecules 2024; 14:843. [PMID: 39062557 PMCID: PMC11274422 DOI: 10.3390/biom14070843] [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: 05/25/2024] [Revised: 07/08/2024] [Accepted: 07/10/2024] [Indexed: 07/28/2024] Open
Abstract
Agricultural workers exposed to organic dust from swine concentrated animal feeding operations (CAFOs) have increased chances of contracting chronic lung disease. Mucociliary clearance represents a first line of defense against inhaled dusts, but organic dust extracts (ODEs) from swine barns cause cilia slowing, leading to decreased bacterial clearance and increased lung inflammation. Because nutritional zinc deficiency is associated with chronic lung disease, we examined the role of zinc supplementation in ODE-mediated cilia slowing. Ciliated mouse tracheal epithelial cells were pretreated with 0-10 µg/mL ZinProTM for 1 h, followed by treatment with 5% ODE for 24 h. Cilia beat frequency (CBF) and protein kinase C epsilon (PKCε) activity were assayed. ODE treatment resulted in cilia slowing after 24 h, which was reversed with 0.5 and 1.0 µg/mL ZinPro pre-treatment. No zinc protection was observed at 50 ng/mL, and ciliated cells detached at high concentrations (100 µg/mL). ZinPro alone produced no changes in the baseline CBF and showed no toxicity to the cells at concentrations of up to 10 µg/mL. Pre-treatment with ZinPro inhibited ODE-stimulated PKCε activation in a dose-dependent manner. Based on ZinPro's superior cell permeability compared to zinc salts, it may be therapeutically more effective at reversing ODE-mediated cilia slowing through a PKCε pathway. These data demonstrate that zinc supplementation may support the mucociliary transport apparatus in the protection of CAFO workers against dust-mediated chronic lung disease.
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Affiliation(s)
- Christopher D. Bauer
- Department of Internal Medicine, Division of Pulmonary, Critical Care & Sleep Medicine, University of Nebraska Medical Center, 985910 Nebraska Medical Center, Omaha, NE 68198, USA; (C.D.B.); (D.D.M.); (D.R.S.)
| | - Deanna D. Mosley
- Department of Internal Medicine, Division of Pulmonary, Critical Care & Sleep Medicine, University of Nebraska Medical Center, 985910 Nebraska Medical Center, Omaha, NE 68198, USA; (C.D.B.); (D.D.M.); (D.R.S.)
| | - Derrick R. Samuelson
- Department of Internal Medicine, Division of Pulmonary, Critical Care & Sleep Medicine, University of Nebraska Medical Center, 985910 Nebraska Medical Center, Omaha, NE 68198, USA; (C.D.B.); (D.D.M.); (D.R.S.)
| | - Jill A. Poole
- Department of Internal Medicine, Division of Allergy & Immunology, University of Nebraska Medical Center, Omaha, NE 68198, USA;
| | - Deandra R. Smith
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198, USA; (D.R.S.); (D.L.K.)
| | - Daren L. Knoell
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198, USA; (D.R.S.); (D.L.K.)
| | - Todd A. Wyatt
- Department of Internal Medicine, Division of Pulmonary, Critical Care & Sleep Medicine, University of Nebraska Medical Center, 985910 Nebraska Medical Center, Omaha, NE 68198, USA; (C.D.B.); (D.D.M.); (D.R.S.)
- Department of Environmental, Agricultural and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Veterans Affairs, Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA
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Crawford MS, Ulu A, Ramirez BM, Santos AN, Chatterjee P, Canale V, Manz S, Lei H, Nordgren TM, McCole DF. Respiratory exposure to agricultural dust extract promotes increased intestinal Tnfα expression, gut barrier dysfunction, and endotoxemia in mice. Am J Physiol Gastrointest Liver Physiol 2024; 326:G3-G15. [PMID: 37874654 PMCID: PMC11208027 DOI: 10.1152/ajpgi.00297.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 10/18/2023] [Accepted: 10/19/2023] [Indexed: 10/26/2023]
Abstract
Concentrated animal feeding operations (CAFOs) are responsible for the production of global greenhouse gases and harmful environmental pollutants including hydrogen sulfide, ammonia, and particulate matter. Swine farmers are frequently exposed to organic dust that is proinflammatory in the lung and are thus at greater risk of developing pneumonia, asthma, and other respiratory conditions. In addition to respiratory disease, air pollutants are directly associated with altered gastrointestinal (GI) physiology and the development of GI diseases, thereby highlighting the gut-lung axis in disease progression. Instillation of hog dust extract (HDE) for 3 wk has been reported to promote the development of chronic airway inflammation in mice, however, the impact of HDE exposure on intestinal homeostasis is poorly understood. We report that 3-wk intranasal exposure of HDE is associated with increased intestinal macromolecule permeability and elevated serum endotoxin concentrations in C57BL/6J mice. In vivo studies also indicated mislocalization of the epithelial cell adhesion protein, E-cadherin, in the colon as well as an increase in the proinflammatory cytokine, Tnfα, in the proximal colon. Moreover, mRNA expression of the Paneth cell-associated marker, Lyz1, was increased the proximal colon, whereas the expression of the goblet cell marker, Muc2, was unchanged in the epithelial cells of the ileum, cecum, and distal colon. These results demonstrate that airway exposure to CAFOs dusts promote airway inflammation and modify the gastrointestinal tract to increase intestinal permeability, induce systemic endotoxemia, and promote intestinal inflammation. Therefore, this study identifies complex physiological consequences of chronic exposure to organic dusts derived from CAFOs on the gut-lung axis.NEW & NOTEWORTHY Agricultural workers have a higher prevalence of occupational respiratory symptoms and are at greater risk of developing respiratory diseases. However, gastrointestinal complications have also been reported, yet the intestinal pathophysiology is understudied. This work is novel because it emphasizes the role of an inhaled environmental pollutant on the development of intestinal pathophysiological outcomes. This work will provide foundation for other studies evaluating how agricultural dusts disrupts host physiology and promotes debilitating gastrointestinal and systemic disorders.
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Affiliation(s)
- Meli'sa S Crawford
- School of Medicine, Division of Biomedical Sciences, University of California, Riverside, California, United States
| | - Arzu Ulu
- School of Medicine, Division of Biomedical Sciences, University of California, Riverside, California, United States
| | - Briana M Ramirez
- Department of Biochemistry and Molecular Biology, University of California, Riverside, California, United States
| | - Alina N Santos
- School of Medicine, Division of Biomedical Sciences, University of California, Riverside, California, United States
| | - Pritha Chatterjee
- School of Medicine, Division of Biomedical Sciences, University of California, Riverside, California, United States
| | - Vinicius Canale
- School of Medicine, Division of Biomedical Sciences, University of California, Riverside, California, United States
| | - Salomon Manz
- School of Medicine, Division of Biomedical Sciences, University of California, Riverside, California, United States
| | - Hillmin Lei
- School of Medicine, Division of Biomedical Sciences, University of California, Riverside, California, United States
| | - Tara M Nordgren
- School of Medicine, Division of Biomedical Sciences, University of California, Riverside, California, United States
- Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, Colorado, United States
| | - Declan F McCole
- School of Medicine, Division of Biomedical Sciences, University of California, Riverside, California, United States
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Johnson AN, Dickinson J, Nelson A, Gaurav R, Kudrna K, Evans SE, Janike K, Wyatt TA, Poole JA. Effect of epithelial-specific MyD88 signaling pathway on airway inflammatory response to organic dust exposure. J Immunotoxicol 2023; 20:2148782. [PMID: 36538286 PMCID: PMC9912912 DOI: 10.1080/1547691x.2022.2148782] [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: 08/11/2022] [Accepted: 11/11/2022] [Indexed: 12/24/2022] Open
Abstract
The Toll-like receptor (TLR) adaptor protein MyD88 is integral to airway inflammatory response to microbial-enriched organic dust extract (ODE) exposures. ODE-induced airway neutrophil influx and release of pro-inflammatory cytokines was essentially abrogated in global MyD88-deficient mice, yet these mice demonstrate an increase in airway epithelial cell mucin expression. To further elucidate the role of MyD88-dependent responses specific to lung airway epithelial cells in response to ODE in vivo, the surfactant protein C protein (SPC) Cre+ embryologic expressing airway epithelial cells floxed for MyD88 to disrupt MyD88 signaling were utilized. The inducible club cell secretory protein (CCSP) Cre+, MyD88 floxed, were also developed. Using an established protocol, mice were intranasally instilled with ODE or saline once or daily up to 3 weeks. Mice with MyD88-deficient SPC+ lung epithelial cells exhibited decreased neutrophil influx following ODE exposure once and repetitively for 1 week without modulation of classic pro-inflammatory mediators including tumor necrosis factor (TNF)-α, interleukin (IL)-6, and neutrophil chemoattractants. This protective response was lost after 3 weeks of repetitive exposure. ODE-induced Muc5ac mucin expression at 1 week was also reduced in MyD88-deficient SPC+ cells. Acute ODE-induced IL-33 was reduced in MyD88-deficient SPC+ cells whereas serum IgE levels were increased at one week. In contrast, mice with inducible MyD88-deficient CCSP+ airway epithelial cells demonstrated no significant difference in experimental indices following ODE exposure. Collectively, these findings suggest that MyD88-dependent signaling targeted to all airway epithelial cells plays an important role in mediating neutrophil influx and mucin production in response to acute organic dust exposures.
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Affiliation(s)
- Amber N. Johnson
- Pulmonary Critical Care and Sleep Division University of Nebraska Medical Center (UNMC), Omaha, NE
| | - John Dickinson
- Pulmonary Critical Care and Sleep Division University of Nebraska Medical Center (UNMC), Omaha, NE
| | - Amy Nelson
- Allergy and Immunology Division, Department of Internal Medicine, University of Nebraska Medical Center (UNMC), Omaha, NE
| | - Rohit Gaurav
- Allergy and Immunology Division, Department of Internal Medicine, University of Nebraska Medical Center (UNMC), Omaha, NE
| | - Katrina Kudrna
- Pulmonary Critical Care and Sleep Division University of Nebraska Medical Center (UNMC), Omaha, NE
| | - Scott E. Evans
- Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Katherine Janike
- Allergy and Immunology Division, Department of Internal Medicine, University of Nebraska Medical Center (UNMC), Omaha, NE
| | - Todd A. Wyatt
- Pulmonary Critical Care and Sleep Division University of Nebraska Medical Center (UNMC), Omaha, NE
- VA Nebraska Western Iowa Health Care System, Omaha, NE
- Department of Environmental, Agricultural and Occupational Health, UNMC, Omaha, NE
| | - Jill A. Poole
- Allergy and Immunology Division, Department of Internal Medicine, University of Nebraska Medical Center (UNMC), Omaha, NE
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Samuelson D, Villageliu D, Cunningham K, Smith D, Knoell D, Mandolfo M, Wyatt T. Regulation of Natural Killer Cell TGF-β and AhR Signaling Pathways Via the Intestinal Microbiota is Critical for Host Defense Against Alcohol-Associated Bacterial Pneumonia. RESEARCH SQUARE 2023:rs.3.rs-3328953. [PMID: 37886455 PMCID: PMC10602187 DOI: 10.21203/rs.3.rs-3328953/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Alcohol use is an independent risk factor for the development of bacterial pneumonia due, in part, to impaired mucus-facilitated clearance, macrophage phagocytosis, and recruitment of neutrophils. Alcohol consumption is also known to reduce peripheral natural killer (NK) cell numbers and compromises NK cell cytolytic activity, especially NK cells with a mature phenotype. However, the role of innate lymphocytes, such as NK cells during host defense against alcohol-associated bacterial pneumonia is essentially unknown. We have previously shown that indole supplementation mitigates increases in pulmonary bacterial burden and improves pulmonary NK cell recruitment in alcohol-fed mice, which were dependent of aryl hydrocarbon receptor (AhR) signaling. Employing a binge-on-chronic alcohol-feeding model we sought to define the role and interaction of indole and NK cells during pulmonary host defense against alcohol-associated pneumonia. We demonstrate that alcohol dysregulates NK cell effector function and pulmonary recruitment via alterations in two key signaling pathways. We found that alcohol increases transforming growth factor beta (TGF-β) signaling, while suppressing AhR signaling. We further demonstrated that NK cells isolated from alcohol-fed mice have a reduced ability to kill Klebsiella pneumoniae. NK cell migratory capacity to chemokines was also significantly altered by alcohol, as NK cells isolated from alcohol-fed mice exhibited preferential migration in response to CXCR3 chemokines but exhibited reduced migration in response to CCR2, CXCR4, and CX3CR1 chemokines. Together this data suggests that alcohol disrupts NK cell specific TGF-β and AhR signaling pathways leading to decreased pulmonary recruitment and cytolytic activity thereby increasing susceptibility to alcohol-associated bacterial pneumonia.
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Cunningham KC, Smith DR, Villageliú DN, Ellis CM, Ramer-Tait AE, Price JD, Wyatt TA, Knoell DL, Samuelson MM, Molina PE, Welsh DA, Samuelson DR. Human Alcohol-Microbiota Mice have Increased Susceptibility to Bacterial Pneumonia. Cells 2023; 12:2267. [PMID: 37759490 PMCID: PMC10526526 DOI: 10.3390/cells12182267] [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: 07/31/2023] [Revised: 08/31/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
Preclinical studies have shown that chronic alcohol abuse leads to alterations in the gastrointestinal microbiota that are associated with behavior changes, physiological alterations, and immunological effects. However, such studies have been limited in their ability to evaluate the direct effects of alcohol-associated dysbiosis. To address this, we developed a humanized alcohol-microbiota mouse model to systematically evaluate the immunological effects of chronic alcohol abuse mediated by intestinal dysbiosis. Germ-free mice were colonized with human fecal microbiota from individuals with high and low Alcohol Use Disorders Identification Test (AUDIT) scores and bred to produce human alcohol-associated microbiota or human control-microbiota F1 progenies. F1 offspring colonized with fecal microbiota from individuals with high AUDIT scores had increased susceptibility to Klebsiella pneumoniae and Streptococcus pneumoniae pneumonia, as determined by increased mortality rates, pulmonary bacterial burden, and post-infection lung damage. These findings highlight the importance of considering both the direct effects of alcohol and alcohol-induced dysbiosis when investigating the mechanisms behind alcohol-related disorders and treatment strategies.
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Affiliation(s)
- Kelly C. Cunningham
- Department of Internal Medicine-Pulmonary Division, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Deandra R. Smith
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Daniel N. Villageliú
- Department of Internal Medicine-Pulmonary Division, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Christi M. Ellis
- Department of Internal Medicine-Pulmonary Division, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Amanda E. Ramer-Tait
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
- Nebraska Food for Health Center, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Jeffrey D. Price
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
- Nebraska Food for Health Center, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Todd A. Wyatt
- Department of Internal Medicine-Pulmonary Division, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Environmental, Agricultural and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68198, USA
| | - Daren L. Knoell
- Department of Internal Medicine-Pulmonary Division, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Pharmacy Practice and Science, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Mystera M. Samuelson
- Department of Environmental, Agricultural and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Animal Behavior Core, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Patricia E. Molina
- Department of Physiology, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
| | - David A. Welsh
- Department of Internal Medicine, Section of Pulmonary/Critical Care & Allergy/Immunology, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
| | - Derrick R. Samuelson
- Department of Internal Medicine-Pulmonary Division, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Nebraska Food for Health Center, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
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Kusampudi S, Meganathan V, Keshava S, Boggaram V. Purification and characterization of a serine protease from organic dust and elucidation of its inductive effects on lung inflammatory mediators. Am J Physiol Lung Cell Mol Physiol 2023; 325:L74-L90. [PMID: 37253661 PMCID: PMC10390052 DOI: 10.1152/ajplung.00309.2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 04/08/2023] [Accepted: 05/26/2023] [Indexed: 06/01/2023] Open
Abstract
Organic dust inhalation is associated with the development of respiratory diseases. Serine protease activities in organic dusts were previously reported to contribute to the induction of lung inflammatory mediators however, the identities of the proteases and the mechanisms by which they induce inflammatory mediators are unknown. The goal of this study was to purify and characterize serine protease(s) from organic dust and elucidate mechanisms by which they induce lung inflammatory mediators. A serine protease was purified from poultry organic dust by benzamidine-agarose affinity chromatography. Mass spectrometry and amino-terminal sequence analysis identified the purified protease as chicken trypsin II-P29. Purified protease induced proinflammatory cytokine levels in Beas2B and NHBE epithelial and THP-1 macrophage cells. Treatment with the purified protease increased cellular and mitochondrial reactive oxygen species (ROS) generation. Induction of inflammatory mediators and ROS were suppressed by serine protease inhibitors and antioxidants. Purified protease activated protein kinase C (PKC), mitogen-activated protein kinase (MAPK)1/3 and MAPK14 signaling, and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and signal transducer and activator of transcription 3 (Stat-3), and chemical inhibitors targeting these pathways suppressed induction of inflammatory mediators. Calcium mobilization studies showed that the purified protease activated protease-activated receptors (PAR) F2R, F2RL1, F2RL2, F2RL3, and F2R and F2RL1 knockdown suppressed the induction of inflammatory mediators. Intranasal instillation of purified protease increased lung chemokine (C-X-C motif) ligand (CXCL)1, interleukin (IL)-6, and tumor necrosis factor (TNF) levels in mice. Our studies have shown that chicken trypsin is a proinflammatory constituent of poultry organic dust, and induces lung inflammatory mediators via increased ROS and PAR activation in a cell signaling pathway involving PKC, MAPK1/3 and MAPK14, and NF-κB and Stat-3.NEW & NOTEWORTHY Inhalation of dust in industrial agricultural operations is linked to the development of lung diseases. Our studies have isolated for the first time a trypsin protease from poultry farm dust and have shown that it stimulates lung inflammation. The protease stimulates the production of oxidants and cell signaling pathways to increase inflammatory mediator production. Targeting trypsin protease in poultry farm environment may be a useful strategy to counter the harmful effects of dust.
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Affiliation(s)
- Shilpa Kusampudi
- Department of Cellular and Molecular Biology, Health Science Center, University of Texas at Tyler, Tyler, Texas, United States
| | - Velmurugan Meganathan
- Department of Cellular and Molecular Biology, Health Science Center, University of Texas at Tyler, Tyler, Texas, United States
| | - Shiva Keshava
- Department of Cellular and Molecular Biology, Health Science Center, University of Texas at Tyler, Tyler, Texas, United States
| | - Vijay Boggaram
- Department of Cellular and Molecular Biology, Health Science Center, University of Texas at Tyler, Tyler, Texas, United States
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Ma C, Gao J, Liang J, Wang F, Xu L, Bu J, He B, Liu G, Niu R, Liu G. CCL12 induces trabecular bone loss by stimulating RANKL production in BMSCs during acute lung injury. Exp Mol Med 2023; 55:818-830. [PMID: 37009797 PMCID: PMC10167364 DOI: 10.1038/s12276-023-00970-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 12/29/2022] [Accepted: 01/03/2023] [Indexed: 04/04/2023] Open
Abstract
In the last three years, the capacity of health care systems and the public health policies of governments worldwide were challenged by the spread of SARS-CoV-2. Mortality due to SARS-CoV-2 mainly resulted from the development of acute lung injury (ALI)/acute respiratory distress syndrome (ARDS). Moreover, millions of people who survived ALI/ARDS in SARS-CoV-2 infection suffer from multiple lung inflammation-induced complications that lead to disability and even death. The lung-bone axis refers to the relationship between lung inflammatory diseases (COPD, asthma, and cystic fibrosis) and bone diseases, including osteopenia/osteoporosis. Compared to chronic lung diseases, the influence of ALI on the skeleton has not been investigated until now. Therefore, we investigated the effect of ALI on bone phenotypes in mice to elucidate the underlying mechanisms. In vivo bone resorption enhancement and trabecular bone loss were observed in LPS-induced ALI mice. Moreover, chemokine (C-C motif) ligand 12 (CCL12) accumulated in the serum and bone marrow. In vivo global ablation of CCL12 or conditional ablation of CCR2 in bone marrow stromal cells (BMSCs) inhibited bone resorption and abrogated trabecular bone loss in ALI mice. Furthermore, we provided evidence that CCL12 promoted bone resorption by stimulating RANKL production in BMSCs, and the CCR2/Jak2/STAT4 axis played an essential role in this process. Our study provides information regarding the pathogenesis of ALI and lays the groundwork for future research to identify new targets to treat lung inflammation-induced bone loss.
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Affiliation(s)
- Chao Ma
- Department of Orthopedic Surgery, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University, Xuzhou Central Hospital Affiliated to Medical School of Southeast University, 199 Jiefang South Road, Xuzhou, 221009, China
| | - Juan Gao
- Department of Gynecology and Obstetrics, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University, Xuzhou Central Hospital Affiliated to Medical School of Southeast University, 199 Jiefang South Road, Xuzhou, 221009, China
| | - Jun Liang
- Department of Endocrinology, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University, Xuzhou Central Hospital Affiliated to Medical School of Southeast University, 199 Jiefang South Road, Xuzhou, 221009, China
| | - Feizhen Wang
- Department of Orthopedic Surgery, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University, Xuzhou Central Hospital Affiliated to Medical School of Southeast University, 199 Jiefang South Road, Xuzhou, 221009, China
| | - Long Xu
- Department of Orthopedic Surgery, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University, Xuzhou Central Hospital Affiliated to Medical School of Southeast University, 199 Jiefang South Road, Xuzhou, 221009, China
| | - Jinhui Bu
- Department of Orthopedic Surgery, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University, Xuzhou Central Hospital Affiliated to Medical School of Southeast University, 199 Jiefang South Road, Xuzhou, 221009, China
| | - Bo He
- Department of Orthopedic Surgery, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University, Xuzhou Central Hospital Affiliated to Medical School of Southeast University, 199 Jiefang South Road, Xuzhou, 221009, China
| | - Guangpu Liu
- Department of Orthopedic Surgery, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University, Xuzhou Central Hospital Affiliated to Medical School of Southeast University, 199 Jiefang South Road, Xuzhou, 221009, China
| | - Ru Niu
- Department of Orthopedic Surgery, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University, Xuzhou Central Hospital Affiliated to Medical School of Southeast University, 199 Jiefang South Road, Xuzhou, 221009, China
| | - Guangwang Liu
- Department of Orthopedic Surgery, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University, Xuzhou Central Hospital Affiliated to Medical School of Southeast University, 199 Jiefang South Road, Xuzhou, 221009, China.
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10
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Heires AJ, Samuelson D, Villageliu D, Nordgren TM, Romberger DJ. Agricultural dust derived bacterial extracellular vesicle mediated inflammation is attenuated by DHA. Sci Rep 2023; 13:2767. [PMID: 36797300 PMCID: PMC9933036 DOI: 10.1038/s41598-023-29781-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 02/10/2023] [Indexed: 02/18/2023] Open
Abstract
Dietary long-chain omega-3 polyunsaturated fatty acids (n-3 PUFA) and their pro-resolving metabolites are protective against atherosclerotic disease, and ameliorate systemic inflammatory conditions including lupus erythematosus, psoriasis, and bronchial asthma. Organic bioaerosol inhalation is a common and injurious hazard associated with agricultural occupations such as work in swine concentrated animal feeding operations (CAFOs) and is known to increase the risk for developing respiratory conditions such as asthma and COPD. Nearly all cells secrete membrane-bound vesicles (extracellular vesicles, EVs) that have the capacity to transmit protein, nucleic acid, and lipid signaling mediators between cells. Using a polymer-based isolation technique (ExoQuick, PEG) followed by ultracentrifugation, EVs were isolated from CAFO dust extracts, and were quantified and partially characterized. Here, we investigated the role of the n-3 PUFA docosahexaenoic acid (DHA) as a component of n-6 to n-3 PUFA mixtures used to recapitulate physiologically relevant dietary ratios in the resolution of inflammatory injury caused by exposure to EVs carried by agricultural organic dust in vitro. Primary human bronchial epithelial cells, fibroblasts and monocyte-derived macrophages were exposed to EVs isolated from swine CAFO dust. Cells were treated with mixtures of n-6 and n-3 PUFA during recovery from the EV-induced injury. CAFO dust extract (DE) was found to contain EVs that contributed significantly to the overall consequences of exposure to complete DE. DHA-rich PUFA ratios inhibited DE-derived EV-induced proinflammatory cytokine release dose-dependently. DHA-rich PUFA ratios also reversed the damaging effects of EVs on recellularization of lung matrix scaffolds, accelerated wound healing, and stimulated the release of pro-resolution mediators. These results underscore the importance of n-3 PUFA as anti-inflammatory compounds during recovery from EV-laden environmental dust exposure in the context of cellular responses in vitro, warranting future translational studies.
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Affiliation(s)
- Art J Heires
- Department of Internal Medicine, Pulmonary, Critical Care & Sleep division, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Derrick Samuelson
- Department of Internal Medicine, Pulmonary, Critical Care & Sleep division, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Daniel Villageliu
- Department of Internal Medicine, Pulmonary, Critical Care & Sleep division, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Tara M Nordgren
- Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO, USA
| | - Debra J Romberger
- VA Nebraska Western Iowa Health Care System, Omaha, NE, USA.
- Department of Internal Medicine, Pulmonary, Critical Care & Sleep division, University of Nebraska Medical Center, Omaha, NE, 68198, USA.
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11
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Ulu A, Sveiven S, Bilg A, Velazquez JV, Diaz M, Mukherjee M, Yuil-Valdes AG, Kota S, Burr A, Najera A, Nordgren TM. IL-22 regulates inflammatory responses to agricultural dust-induced airway inflammation. Toxicol Appl Pharmacol 2022; 446:116044. [PMID: 35525330 PMCID: PMC9133182 DOI: 10.1016/j.taap.2022.116044] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 04/21/2022] [Accepted: 04/28/2022] [Indexed: 11/26/2022]
Abstract
IL-22 is a unique cytokine that is upregulated in many chronic inflammatory diseases, including asthma, and modulates tissue responses during inflammation. However, the role of IL-22 in the resolution of inflammation and how this contributes to lung repair processes are largely unknown. Here, we tested the hypothesis that IL-22 signaling is critical in inflammation resolution after repetitive exposure to agricultural dust. Using an established mouse model of organic dust extract-induced lung inflammation, we found that IL-22 knockout mice have an enhanced response to agricultural dust as evidenced by an exacerbated increase in infiltrating immune cells and lung pathology as compared to wild-type controls. We further identified that, in response to dust, IL-22 is expressed in airway epithelium and in Ym1+ macrophages found within the parenchyma in response to dust. The increase in IL-22 expression was accompanied by increases in IL-22 receptor IL-22R1 within the lung epithelium. In addition, we found that alveolar macrophages in vivo as well as THP-1 cells in vitro express IL-22, and this expression is modulated by dust exposure. Furthermore, subcellular localization of IL-22 appears to be in the Golgi of resting THP1 human monocytes, and treatment with dust extracts is associated with IL-22 release into the cytosolic compartment from the Golgi reservoirs during dust extract exposure. Taken together, we have identified a significant role for macrophage-mediated IL-22 signaling that is activated in dust-induced lung inflammation in mice.
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Affiliation(s)
- Arzu Ulu
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA
| | - Stefanie Sveiven
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA
| | - Amanpreet Bilg
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA
| | - Jalene V Velazquez
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA
| | - Marissa Diaz
- Riverside Community College, Riverside, CA 92521, USA
| | - Maheswari Mukherjee
- Department of Medical Sciences, College of Allied Health Professions, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Ana G Yuil-Valdes
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Santosh Kota
- Department of Preprofessional Biology, University of Florida, Gainesville, FL 32603, USA
| | - Abigail Burr
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA
| | - Aileen Najera
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA
| | - Tara M Nordgren
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA; Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO, 80521, USA.
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12
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Zhao M, Li C, Zhang J, Yin Z, Zheng Z, Wan J, Wang M. Maresin-1 and Its Receptors RORα/LGR6 as Potential Therapeutic Target for Respiratory Diseases. Pharmacol Res 2022; 182:106337. [PMID: 35781060 DOI: 10.1016/j.phrs.2022.106337] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/18/2022] [Accepted: 06/28/2022] [Indexed: 12/15/2022]
Abstract
Maresin-1 is one of the representative specialized pro-resolving mediators that has shown beneficial effects in inflammatory disease models. Recently, two distinct types of receptor molecules were discovered as the targets of maresin-1, further revealing the pro-resolution mechanism of maresin-1. One is retinoic acid-related orphan receptor α (RORα) and the another one is leucine-rich repeat domain-containing G protein-coupled receptor 6 (LGR6). In this review, we summarized the detailed role of maresin-1 and its two different receptors in respiratory diseases. RORα and LGR6 are potential targets for the treatment of respiratory diseases. Future basic research and clinical trials on MaR1 and its receptors should provide useful information for the treatment of respiratory diseases.
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Affiliation(s)
- Mengmeng Zhao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Cardiovascular Research Institute, Wuhan University, Wuhan 430060, PR China; Hubei Key Laboratory of Cardiology, Wuhan 430060, PR China
| | - Chenfei Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Cardiovascular Research Institute, Wuhan University, Wuhan 430060, PR China
| | - Jishou Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Cardiovascular Research Institute, Wuhan University, Wuhan 430060, PR China
| | - Zheng Yin
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Cardiovascular Research Institute, Wuhan University, Wuhan 430060, PR China; Hubei Key Laboratory of Cardiology, Wuhan 430060, PR China
| | - Zihui Zheng
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Cardiovascular Research Institute, Wuhan University, Wuhan 430060, PR China; Hubei Key Laboratory of Cardiology, Wuhan 430060, PR China
| | - Jun Wan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Cardiovascular Research Institute, Wuhan University, Wuhan 430060, PR China; Hubei Key Laboratory of Cardiology, Wuhan 430060, PR China.
| | - Menglong Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Cardiovascular Research Institute, Wuhan University, Wuhan 430060, PR China; Hubei Key Laboratory of Cardiology, Wuhan 430060, PR China.
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13
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Meganathan V, Hamilton CE, Natarajan K, Keshava S, Boggaram V. NADPH and xanthine oxidases control induction of inflammatory mediator expression by organic dust in the lung. FASEB J 2022; 36:e22381. [PMID: 35661421 DOI: 10.1096/fj.202100732r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 04/29/2022] [Accepted: 05/16/2022] [Indexed: 11/11/2022]
Abstract
Exposure to organic dust in animal and agricultural farms and the ensuing lung inflammation are linked to the development of respiratory diseases. We found previously that elevated production of reactive oxygen species (ROS) by aqueous poultry organic dust extract (hereafter referred to as dust extract) mediates induction of proinflammatory mediators in airway epithelial cells. In the present study, we investigated whether ROS generated by NADPH oxidases (NOX) and xanthine oxidase (XO) controls induction of inflammatory mediators by dust extract and the underlying mechanisms in bronchial epithelial cells. Using chemical inhibitors and siRNA targeted knockdown, we found that NOX1, NOX2, NOX4, and XO-derived ROS regulates induction of proinflammatory mediator levels. Like airway epithelial cells in vitro, NOX inhibitor VAS2870 reduced keratinocyte chemoattractant (KC), IL-6, and TNF-α production and 4-hydroxynonenal (4-HNE) staining induced by dust extract in mouse lungs. VAS2870 inhibition of proinflammatory mediators was associated with reduced NFκB and Stat3 activation indicating that NOX generated ROS activates NFκB and Stat3 to induce proinflammatory gene expression. Dust extract increased the membrane association of p47phox in airway epithelial cells indicating NOX2 activation but had no effect on NOX2 protein levels. In summary, our studies have shown that NOX and XO generated ROS control organic dust induction of proinflammatory mediators in airway epithelial cells via NFκB and Stat3 activation.
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Affiliation(s)
- Velmurugan Meganathan
- Department of Cellular and Molecular Biology, Health Science Center, University of Texas at Tyler, Tyler, Texas, USA
| | - Cory E Hamilton
- Department of Cellular and Molecular Biology, Health Science Center, University of Texas at Tyler, Tyler, Texas, USA
| | - Kartiga Natarajan
- Department of Cellular and Molecular Biology, Health Science Center, University of Texas at Tyler, Tyler, Texas, USA
| | - Shiva Keshava
- Department of Cellular and Molecular Biology, Health Science Center, University of Texas at Tyler, Tyler, Texas, USA
| | - Vijay Boggaram
- Department of Cellular and Molecular Biology, Health Science Center, University of Texas at Tyler, Tyler, Texas, USA
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14
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Massey N, Shrestha D, Bhat SM, Padhi P, Wang C, Karriker LA, Smith JD, Kanthasamy AG, Charavaryamath C. Mitoapocynin Attenuates Organic Dust Exposure-Induced Neuroinflammation and Sensory-Motor Deficits in a Mouse Model. Front Cell Neurosci 2022; 16:817046. [PMID: 35496912 PMCID: PMC9043522 DOI: 10.3389/fncel.2022.817046] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
Increased incidences of neuro-inflammatory diseases in the mid-western United States of America (USA) have been linked to exposure to agriculture contaminants. Organic dust (OD) is a major contaminant in the animal production industry and is central to the respiratory symptoms in the exposed individuals. However, the exposure effects on the brain remain largely unknown. OD exposure is known to induce a pro-inflammatory phenotype in microglial cells. Further, blocking cytoplasmic NOX-2 using mitoapocynin (MA) partially curtail the OD exposure effects. Therefore, using a mouse model, we tested a hypothesis that inhaled OD induces neuroinflammation and sensory-motor deficits. Mice were administered with either saline, fluorescent lipopolysaccharides (LPSs), or OD extract intranasally daily for 5 days a week for 5 weeks. The saline or OD extract-exposed mice received either a vehicle or MA (3 mg/kg) orally for 3 days/week for 5 weeks. We quantified inflammatory changes in the upper respiratory tract and brain, assessed sensory-motor changes using rotarod, open-field, and olfactory test, and quantified neurochemicals in the brain. Inhaled fluorescent LPS (FL-LPS) was detected in the nasal turbinates and olfactory bulbs. OD extract exposure induced atrophy of the olfactory epithelium with reduction in the number of nerve bundles in the nasopharyngeal meatus, loss of cilia in the upper respiratory epithelium with an increase in the number of goblet cells, and increase in the thickness of the nasal epithelium. Interestingly, OD exposure increased the expression of HMGB1, 3- nitrotyrosine (NT), IBA1, glial fibrillary acidic protein (GFAP), hyperphosphorylated Tau (p-Tau), and terminal deoxynucleotidyl transferase deoxyuridine triphosphate (dUTP) nick end labeling (TUNEL)-positive cells in the brain. Further, OD exposure decreased time to fall (rotarod), total distance traveled (open-field test), and olfactory ability (novel scent test). Oral MA partially rescued olfactory epithelial changes and gross congestion of the brain tissue. MA treatment also decreased the expression of HMGB1, 3-NT, IBA1, GFAP, and p-Tau, and significantly reversed exposure induced sensory-motor deficits. Neurochemical analysis provided an early indication of depressive behavior. Collectively, our results demonstrate that inhalation exposure to OD can cause sustained neuroinflammation and behavior deficits through lung-brain axis and that MA treatment can dampen the OD-induced inflammatory response at the level of lung and brain.
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Affiliation(s)
- Nyzil Massey
- Biomedical Sciences, Iowa State University, Ames, IA, United States
| | - Denusha Shrestha
- Biomedical Sciences, Iowa State University, Ames, IA, United States
| | | | - Piyush Padhi
- Biomedical Sciences, Iowa State University, Ames, IA, United States
| | - Chong Wang
- Veterinary Diagnostic and Production Animal Medicine (VDPAM), Iowa State University, Ames, IA, United States
- Statistics, Iowa State University, Ames, IA, United States
| | - Locke A. Karriker
- Veterinary Diagnostic and Production Animal Medicine (VDPAM), Iowa State University, Ames, IA, United States
| | - Jodi D. Smith
- Veterinary Pathology, Iowa State University, Ames, IA, United States
| | | | - Chandrashekhar Charavaryamath
- Biomedical Sciences, Iowa State University, Ames, IA, United States
- *Correspondence: Chandrashekhar Charavaryamath ; orcid.org/0000-0002-5217-1608
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15
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Dominguez EC, Phandthong R, Nguyen M, Ulu A, Guardado S, Sveiven S, Talbot P, Nordgren TM. Aspirin-Triggered Resolvin D1 Reduces Chronic Dust-Induced Lung Pathology without Altering Susceptibility to Dust-Enhanced Carcinogenesis. Cancers (Basel) 2022; 14:cancers14081900. [PMID: 35454807 PMCID: PMC9032113 DOI: 10.3390/cancers14081900] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 03/28/2022] [Accepted: 04/01/2022] [Indexed: 02/05/2023] Open
Abstract
Simple Summary Farm workers are at an increased risk of developing acute and chronic lung inflammatory diseases from their everyday exposure to organic dust. Previous investigations have examined the inflammatory effects in mice from single and repetitive exposure to dust from swine confinement facilities, however, no study has explored these effects in a chronic model. To address this research gap, we established a chronic dust exposure mouse model of lung tumorigenesis that was also used to measure the efficacy of omega-3 fatty acid-derived lipid mediators as therapeutics for mitigating these induced responses. Our results from these investigations are the first to evaluate the chronic inflammatory, and carcinogenic effects of these dusts, as well as identify a potential therapeutic strategy for mitigating the inflammatory effects by using an omega-3 fatty acid-derived bioactive lipid mediator. Abstract Lung cancer is the leading cause of cancer-related deaths worldwide, with increased risk being associated with unresolved or chronic inflammation. Agricultural and livestock workers endure significant exposure to agricultural dusts on a routine basis; however, the chronic inflammatory and carcinogenic effects of these dust exposure is unclear. We have developed a chronic dust exposure model of lung carcinogenesis in which mice were intranasally challenged three times a week for 24 weeks, using an aqueous dust extract (HDE) made from dust collected in swine confinement facilities. We also treated mice with the omega-3-fatty acid lipid mediator, aspirin-triggered resolvin D1 (AT-RvD1) to provide a novel therapeutic strategy for mitigating the inflammatory and carcinogenic effects of HDE. Exposure to HDE resulted in significant immune cell influx into the lungs, enhanced lung tumorigenesis, severe tissue pathogenesis, and a pro-inflammatory and carcinogenic gene signature, relative to saline-exposed mice. AT-RvD1 treatment mitigated the dust-induced inflammatory response but did not protect against HDE + NNK-enhanced tumorigenesis. Our data suggest that chronic HDE exposure induces a significant inflammatory and pro-carcinogenic response, whereas treatment with AT-RvD1 dampens the inflammatory responses, providing a strong argument for the therapeutic use of AT-RvD1 to mitigate chronic inflammation.
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Affiliation(s)
- Edward C. Dominguez
- Environmental Toxicology Graduate Program, University of California Riverside, Riverside, CA 92521, USA; (E.C.D.); (P.T.)
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA 92521, USA; (M.N.); (A.U.); (S.G.); (S.S.)
| | - Rattapol Phandthong
- Department of Molecular, Cell and Systems Biology, University of California Riverside, Riverside, CA 92521, USA;
| | - Matthew Nguyen
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA 92521, USA; (M.N.); (A.U.); (S.G.); (S.S.)
| | - Arzu Ulu
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA 92521, USA; (M.N.); (A.U.); (S.G.); (S.S.)
| | - Stephanie Guardado
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA 92521, USA; (M.N.); (A.U.); (S.G.); (S.S.)
| | - Stefanie Sveiven
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA 92521, USA; (M.N.); (A.U.); (S.G.); (S.S.)
| | - Prue Talbot
- Environmental Toxicology Graduate Program, University of California Riverside, Riverside, CA 92521, USA; (E.C.D.); (P.T.)
- Department of Molecular, Cell and Systems Biology, University of California Riverside, Riverside, CA 92521, USA;
| | - Tara M. Nordgren
- Environmental Toxicology Graduate Program, University of California Riverside, Riverside, CA 92521, USA; (E.C.D.); (P.T.)
- Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA 92521, USA; (M.N.); (A.U.); (S.G.); (S.S.)
- Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO 80523, USA
- Correspondence:
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16
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Ulu A, Velazquez JV, Burr A, Sveiven SN, Yang J, Bravo C, Hammock BD, Nordgren TM. Sex-Specific Differences in Resolution of Airway Inflammation in Fat-1 Transgenic Mice Following Repetitive Agricultural Dust Exposure. Front Pharmacol 2022; 12:785193. [PMID: 35095496 PMCID: PMC8793679 DOI: 10.3389/fphar.2021.785193] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/23/2021] [Indexed: 11/13/2022] Open
Abstract
In agriculture industries, workers are at increased risk for developing pulmonary diseases due to inhalation of agricultural dusts, particularly when working in enclosed confinement facilities. Agricultural dusts inhalation leads to unresolved airway inflammation that precedes the development and progression of lung disease. We have previously shown beneficial effects of the omega-3 polyunsaturated fatty acid (ω-3 PUFA) DHA in protecting against the negative inflammatory effects of repetitive dust exposure in the lung. Dietary manipulation of pulmonary disease risk is an attractive and timely approach given the contribution of an increased ω-6 to ω-3 PUFA ratio to low grade inflammation and chronic disease in the Western diet. To prevent any confounding factors that comes with dietary supplementation of ω-3 PUFA (different sources, purity, dose, and duration), we employed a Fat-1 transgenic mouse model that convert ω-6 PUFA to ω-3 PUFA, leading to a tissue ω-6 to ω-3 PUFA ratio of approximately 1:1. Building on our initial findings, we hypothesized that attaining elevated tissue levels of ω-3 PUFA would attenuate agricultural dust-induced lung inflammation and its resolution. To test this hypothesis, we compared wild-type (WT) and Fat-1 transgenic mice in their response to aqueous extracts of agricultural dust (DE). We also used a soluble epoxide hydrolase inhibitor (sEH) to potentiate the effects of ω-3 PUFA, since sEH inhibitors have been shown to stabilize the anti-inflammatory P450 metabolites derived from both ω-3 and ω-6 PUFA and promote generation of specialized pro-resolving lipid mediators from ω-3 PUFA. Over a three-week period, mice were exposed to a total of 15 intranasal instillations of DE obtained from swine confinement buildings in the Midwest. We observed genotype and sex-specific differences between the WT vs. Fat-1 transgenic mice in response to repetitive dust exposure, where three-way ANOVA revealed significant main effects of treatment, genotype, and sex. Also, Fat-1 transgenic mice displayed reduced lymphoid aggregates in the lung following DE exposure as compared to WT animals exposed to DE, suggesting improved resilience to the DE-induced inflammatory effects. Overall, our data implicate a protective role of ω-3 FA in the lung following repetitive dust exposure.
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Affiliation(s)
- Arzu Ulu
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, CA, United States
| | - Jalene V Velazquez
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, CA, United States
| | - Abigail Burr
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, CA, United States
| | - Stefanie N Sveiven
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, CA, United States
| | - Jun Yang
- Department of Entomology and Nematology, University of California Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Carissa Bravo
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, CA, United States
| | - Bruce D Hammock
- Department of Entomology and Nematology, University of California Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
| | - Tara M Nordgren
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, CA, United States.,Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO, United States
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17
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Poole JA, Mikuls TR, Thiele GM, Gaurav R, Nelson AJ, Duryee MJ, Mitra A, Hunter C, Wyatt TA, England BR, Ascherman DP. Increased susceptibility to organic dust exposure-induced inflammatory lung disease with enhanced rheumatoid arthritis-associated autoantigen expression in HLA-DR4 transgenic mice. Respir Res 2022; 23:160. [PMID: 35717175 PMCID: PMC9206339 DOI: 10.1186/s12931-022-02085-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 06/13/2022] [Indexed: 11/10/2022] Open
Abstract
Immunogenetic as well as environmental and occupational exposures have been linked to the development of rheumatoid arthritis (RA), RA-associated lung disease, and other primary lung disorders. Importantly, various inhalants can trigger post-translational protein modifications, resulting in lung autoantigen expression capable of stimulating pro-inflammatory and/or pro-fibrotic immune responses. To further elucidate gene-environment interactions contributing to pathologic lung inflammation, we exploited an established model of organic dust extract (ODE) exposure with and without collagen-induced arthritis (CIA) in C57BL/6 wild type (WT) versus HLA-DR4 transgenic mice. ODE-induced airway infiltration driven by neutrophils was significantly increased in DR4 versus WT mice, with corresponding increases in bronchoalveolar lavage fluid (BALF) levels of TNF-⍺, IL-6, and IL-33. Lung histopathology demonstrated increased number of ectopic lymphoid aggregates comprised of T and B cells following ODE exposure in DR4 mice. ODE also induced citrullination, malondialdehyde acetaldehyde (MAA) modification, and vimentin expression that co-localized with MAA and was enhanced in DR4 mice. Serum and BALF anti-MAA antibodies were strikingly increased in ODE-treated DR4 mice. Coupling ODE exposure with Type II collagen immunization (CIA) resulted in similarly augmented pro-inflammatory lung profiles in DR4 mice (relative to WT mice) that was accompanied by a profound increase in infiltrating lung CD4+ and CD8+ T cells as well as CD19+CD11b+ autoimmune B cells. Neither modeling strategy induced significant arthritis. These findings support a model in which environmental insults trigger enhanced post-translational protein modification and lung inflammation sharing immunopathological features with RA-associated lung disease in the selected immunogenetic background of HLA-DR4 mice.
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Affiliation(s)
- Jill A. Poole
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE USA
| | - Ted R. Mikuls
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE USA ,grid.413785.cVeterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE USA
| | - Geoffrey M. Thiele
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE USA ,grid.413785.cVeterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE USA
| | - Rohit Gaurav
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE USA
| | - Amy J. Nelson
- grid.413785.cVeterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE USA
| | - Michael J. Duryee
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE USA ,grid.413785.cVeterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE USA
| | - Ananya Mitra
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE USA
| | - Carlos Hunter
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE USA
| | - Todd A. Wyatt
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE USA ,grid.413785.cVeterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE USA ,grid.266813.80000 0001 0666 4105Department of Environmental, Agricultural & Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE USA
| | - Bryant R. England
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE USA ,grid.413785.cVeterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE USA
| | - Dana P. Ascherman
- grid.21925.3d0000 0004 1936 9000Department of Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, PA USA
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18
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Ulu A, Burr A, Heires AJ, Pavlik J, Larsen T, Perez PA, Bravo C, DiPatrizio NV, Baack M, Romberger DJ, Nordgren TM. A high docosahexaenoic acid diet alters lung inflammation and recovery following repetitive exposure to aqueous organic dust extracts. J Nutr Biochem 2021; 97:108797. [PMID: 34126202 PMCID: PMC8725620 DOI: 10.1016/j.jnutbio.2021.108797] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 05/27/2021] [Accepted: 05/28/2021] [Indexed: 12/15/2022]
Abstract
Agricultural workers, especially those who work in swine confinement facilities, are at increased risk for developing pulmonary diseases including asthma, chronic obstructive pulmonary disease, and chronic bronchitis due to exposures to fumes, vapors, and organic dust. Repetitive exposure to agricultural dust leads to unresolved inflammation, a common underlying mechanism that worsens lung disease. Besides occupational exposure to dusts, diet also significantly contributes to inflammation and disease progression. Since DHA (docosahexaenoic acid), a polyunsaturated omega-3 fatty acid and its bioactive metabolites have key roles in inflammation resolution, we rationalized that individuals chronically exposed to organic dusts can benefit from dietary modifications. Here, we evaluated the role of DHA in modifying airway inflammation in a murine model of repetitive exposure to an aqueous extract of agricultural dust (three-week exposure to swine confinement dust extract, HDE) and after a one-week resolution/recovery period. We found that mice fed a high DHA diet had significantly increased bronchoalveolar lavage fluid (BALF) levels of DHA-derived resolvins and lower TNFα along with altered plasma levels of endocannabinoids and related lipid mediators. Following the one-week recovery we identified significantly reduced BALF cellularity and cytokine/chemokine release along with increased BALF amphiregulin and resolvins in DHA diet-fed versus control diet-fed mice challenged with HDE. We further report observations on the effects of repetitive HDE exposure on lung Ym1+ and Arg-1+ macrophages. Overall, our findings support a protective role for DHA and identify DHA-derived resolvins and endocannabinoids among the potential mediators of DHA in altering airway inflammation in chronic agricultural dust exposure.
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Affiliation(s)
- Arzu Ulu
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, California, USA
| | - Abigail Burr
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, California, USA
| | - Art J Heires
- Pulmonary, Critical Care, Sleep and Allergy Division, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Jacqueline Pavlik
- Pulmonary, Critical Care, Sleep and Allergy Division, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Tricia Larsen
- Children's Health Research Center, Sanford Research, Sioux Falls, South Dakota, USA
| | - Pedro A Perez
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, California, USA
| | - Carissa Bravo
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, California, USA
| | - Nicholas V DiPatrizio
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, California, USA
| | - Michelle Baack
- Children's Health Research Center, Sanford Research, Sioux Falls, South Dakota, USA; Division of Neonatology, University of South Dakota-Sanford School of Medicine, Sioux Falls, South Dakota, USA
| | - Debra J Romberger
- VA Nebraska-Western Iowa Healthcare System, Omaha, Nebraska, USA; Pulmonary, Critical Care, Sleep and Allergy Division, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Tara M Nordgren
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, Riverside, California, USA; Pulmonary, Critical Care, Sleep and Allergy Division, University of Nebraska Medical Center, Omaha, Nebraska, USA.
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19
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Mikuls TR, Gaurav R, Thiele GM, England BR, Wolfe MG, Shaw BP, Bailey KL, Wyatt TA, Nelson AJ, Duryee MJ, Hunter CD, Wang D, Romberger DJ, Ascherman DP, Poole JA. The impact of airborne endotoxin exposure on rheumatoid arthritis-related joint damage, autoantigen expression, autoimmunity, and lung disease. Int Immunopharmacol 2021; 100:108069. [PMID: 34461491 PMCID: PMC8551041 DOI: 10.1016/j.intimp.2021.108069] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/15/2021] [Accepted: 07/15/2021] [Indexed: 12/11/2022]
Abstract
Airborne biohazards are risk factors in the development and severity of rheumatoid arthritis (RA) and RA-associated lung disease, yet the mechanisms explaining this relationship remain unclear. Lipopolysaccharide (LPS, endotoxin) is a ubiquitous inflammatory agent in numerous environmental and occupational air pollutant settings recognized to induce airway inflammation. Combining repetitive LPS inhalation exposures with the collagen induced arthritis (CIA) model, DBA1/J mice were assigned to either: sham (saline injection/saline inhalation), CIA (CIA/saline), LPS (saline/LPS 100 ng inhalation), or CIA + LPS for 5 weeks. Serum anti-citrullinated (CIT) protein antibody (ACPA) and anti-malondialdehyde-acetaldehyde (MAA) antibodies were strikingly potentiated with co-exposure (CIA + LPS). CIT- and MAA-modified lung proteins were increased with co-exposure and co-localized across treatment groups. Inhaled LPS exacerbated arthritis with CIA + LPS > LPS > CIA versus sham. Periarticular bone loss was demonstrated in CIA and CIA + LPS but not in LPS alone. LPS induced airway inflammation and neutrophil infiltrates were reduced with co-exposure (CIA + LPS). Potentially signaling transition to pro-fibrotic processes, there were increased infiltrates of activated CD11c+CD11b+ macrophages and transitioning CD11c+CD11bint monocyte-macrophage populations with CIA + LPS. Moreover, several lung remodeling proteins including fibronectin and matrix metalloproteinases as well as complement C5a were potentiated with CIA + LPS compared to other treatment groups. IL-33 concentrations in lung homogenates were enhanced with CIA + LPS with IL-33 lung staining driven by LPS. IL-33 expression was also significantly increased in lung tissues from patients with RA-associated lung disease (N = 8) versus controls (N = 7). These findings suggest that patients with RA may be more susceptible to developing interstitial lung disease following airborne biohazard exposures enriched in LPS.
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MESH Headings
- Air Pollutants/adverse effects
- Animals
- Arthritis, Experimental/complications
- Arthritis, Experimental/diagnosis
- Arthritis, Experimental/immunology
- Arthritis, Experimental/pathology
- Arthritis, Rheumatoid/complications
- Arthritis, Rheumatoid/diagnosis
- Arthritis, Rheumatoid/immunology
- Arthritis, Rheumatoid/pathology
- Autoantibodies/immunology
- Autoantigens/immunology
- Case-Control Studies
- Dust
- Healthy Volunteers
- Humans
- Inhalation Exposure/adverse effects
- Interleukin-33/analysis
- Interleukin-33/metabolism
- Lipopolysaccharides/adverse effects
- Lung/immunology
- Lung/pathology
- Lung Diseases, Interstitial/immunology
- Lung Diseases, Interstitial/pathology
- Male
- Mice
- Severity of Illness Index
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Affiliation(s)
- Ted R Mikuls
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA; Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Rohit Gaurav
- Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Geoffrey M Thiele
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA; Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Bryant R England
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA; Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Madison G Wolfe
- Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Brianna P Shaw
- Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Kristina L Bailey
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA; Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Todd A Wyatt
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA; Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA; Department of Environmental, Agricultural & Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA
| | - Amy J Nelson
- Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Michael J Duryee
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA; Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Carlos D Hunter
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA; Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Dong Wang
- Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - Debra J Romberger
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA; Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Dana P Ascherman
- Department of Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jill A Poole
- Department of Internal Medicine, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA.
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20
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Burr AC, Velazquez JV, Ulu A, Kamath R, Kim SY, Bilg AK, Najera A, Sultan I, Botthoff JK, Aronson E, Nair MG, Nordgren TM. Lung Inflammatory Response to Environmental Dust Exposure in Mice Suggests a Link to Regional Respiratory Disease Risk. J Inflamm Res 2021; 14:4035-4052. [PMID: 34456580 PMCID: PMC8387588 DOI: 10.2147/jir.s320096] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 08/06/2021] [Indexed: 12/16/2022] Open
Abstract
PURPOSE The Salton Sea, California's largest lake, is designated as an agricultural drainage reservoir. In recent years, the lake has experienced shrinkage due to reduced water sources, increasing levels of aerosolized dusts in surrounding regions. Communities surrounding the Salton Sea have increased asthma prevalence versus the rest of California; however, a connection between dust inhalation and lung health impacts has not been defined. METHODS We used an established intranasal dust exposure murine model to study the lung inflammatory response following single or repetitive (7-day) exposure to extracts of dusts collected in regions surrounding the Salton Sea (SSDE), complemented with in vitro investigations assessing SSDE impacts on the airway epithelium. RESULTS In these investigations, single or repetitive SSDE exposure induced significant lung inflammatory cytokine release concomitant with neutrophil influx. Repetitive SSDE exposure led to significant lung eosinophil recruitment and altered expression of genes associated with allergen-mediated immune response, including Clec4e. SSDE treatment of human bronchial epithelial cells (BEAS-2B) induced inflammatory cytokine production at 5- and 24-hours post-treatment. When BEAS-2B were exposed to protease activity-depleted SSDE (PDSSDE) or treated with SSDE in the context of protease-activated receptor-1 and -2 antagonism, inflammatory cytokine release was decreased. Furthermore, repetitive exposure to PDSSDE led to decreased neutrophil and eosinophilic influx and IL-6 release in mice compared to SSDE-challenged mice. CONCLUSION These investigations demonstrate potent lung inflammatory responses and tissue remodeling in response to SSDE, in part due to environmental proteases found within the dusts. These studies provide the first evidence supporting a link between environmental dust exposure, protease-mediated immune activation, and respiratory disease in the Salton Sea region.
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Affiliation(s)
- Abigail C Burr
- Division of Biomedical Sciences, University of California Riverside, Riverside, CA, 92521, USA
| | - Jalene V Velazquez
- Division of Biomedical Sciences, University of California Riverside, Riverside, CA, 92521, USA
| | - Arzu Ulu
- Division of Biomedical Sciences, University of California Riverside, Riverside, CA, 92521, USA
| | - Rohan Kamath
- Division of Biomedical Sciences, University of California Riverside, Riverside, CA, 92521, USA
| | - Sang Yong Kim
- Division of Biomedical Sciences, University of California Riverside, Riverside, CA, 92521, USA
| | - Amanpreet K Bilg
- Division of Biomedical Sciences, University of California Riverside, Riverside, CA, 92521, USA
| | - Aileen Najera
- Division of Biomedical Sciences, University of California Riverside, Riverside, CA, 92521, USA
| | - Iman Sultan
- Division of Biomedical Sciences, University of California Riverside, Riverside, CA, 92521, USA
| | - Jon K Botthoff
- Center for Conservation Biology, University of California Riverside, Riverside, CA, 92521, USA
| | - Emma Aronson
- Department of Plant Pathology and Microbiology, University of California Riverside, Riverside, CA, 92521, USA
| | - Meera G Nair
- Division of Biomedical Sciences, University of California Riverside, Riverside, CA, 92521, USA
| | - Tara M Nordgren
- Division of Biomedical Sciences, University of California Riverside, Riverside, CA, 92521, USA
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21
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Pandher U, Kirychuk S, Schneberger D, Thompson B, Aulakh G, Sethi RS, Singh B. Pulmonary inflammatory response from co-exposure to LPS and glyphosate. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2021; 86:103651. [PMID: 33812014 DOI: 10.1016/j.etap.2021.103651] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 06/12/2023]
Abstract
Agricultural airborne work exposures are complex in nature and workplace exposures are a risk for respiratory outcomes in workers. Endotoxin and glyphosate are two common agents in agricultural exposures. While endotoxin (lipopolysaccaride, LPS) is a potent inflammatory agent it explains only a portion of the respiratory inflammatory response. The inflammatory potential when LPS is presented with another common agricultural respiratory agent, glyphosate, is not known. METHODS Mice were assigned to four treatment groups: control, LPS alone, glyphosate alone, glyphosate and LPS combined. Treatments were for 1, 5 or 10 days. RESULTS Five days of repeated exposure to the comintation of LPS and glyphosate resulted in higher neutrophil counts, myloperoxidase, TNF-α, IL-6, KC levels, and ICAM-1 and TLR-2 expression compared to the same length of treatment to LPS or glyphosate alone. After 10-days of exposure, inflammatory responses decreased, however leukocyte infiltration persisted along with increases in IL-4. CONCLUSIONS Glyphosate exposure modified LPS induced lung inflammatory responses and TLR-2 may be important in the modulated inflammatory response.
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Affiliation(s)
- Upkardeep Pandher
- Canadian Centre for Health and Safety in Agriculture, Department of Medicine, College of Medicine, University of Saskatchewan, 104 Clinic Place, P.O. Box 23, Saskatoon, Saskatchewan, S7N 2Z4, Canada
| | - Shelley Kirychuk
- Canadian Centre for Health and Safety in Agriculture, Department of Medicine, College of Medicine, University of Saskatchewan, 104 Clinic Place, P.O. Box 23, Saskatoon, Saskatchewan, S7N 2Z4, Canada.
| | - David Schneberger
- Canadian Centre for Health and Safety in Agriculture, Department of Medicine, College of Medicine, University of Saskatchewan, 104 Clinic Place, P.O. Box 23, Saskatoon, Saskatchewan, S7N 2Z4, Canada
| | - Brooke Thompson
- Canadian Centre for Health and Safety in Agriculture, Department of Medicine, College of Medicine, University of Saskatchewan, 104 Clinic Place, P.O. Box 23, Saskatoon, Saskatchewan, S7N 2Z4, Canada
| | - Gurpreet Aulakh
- Department of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan, S7N 5B4, Canada
| | - R S Sethi
- College of Animal Biotechnology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, 141004, India
| | - Baljit Singh
- University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan, S7N 5B4, Canada
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22
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Massey N, Shrestha D, Bhat SM, Kondru N, Charli A, Karriker LA, Kanthasamy AG, Charavaryamath C. Organic dust-induced mitochondrial dysfunction could be targeted via cGAS-STING or cytoplasmic NOX-2 inhibition using microglial cells and brain slice culture models. Cell Tissue Res 2021; 384:465-486. [PMID: 33687557 DOI: 10.1007/s00441-021-03422-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 01/21/2021] [Indexed: 12/12/2022]
Abstract
Organic dust (OD) exposure in animal production industries poses serious respiratory and other health risks. OD consisting of microbial products and particulate matter and OD exposure-induced respiratory inflammation are under investigation. However, the effect of OD exposure on brain remains elusive. We show that OD exposure of microglial cells induces an inflammatory phenotype with the release of mitochondrial DNA (mt-DNA). Therefore, we tested a hypothesis that OD exposure-induced secreted mt-DNA signaling drives the inflammation. A mouse microglial cell line was treated with medium or organic dust extract (ODE, 1% v/v) along with either phosphate-buffered saline (PBS) or mitoapocynin (MA, 10 µmol). Microglia treated with control or anti-STING siRNA were exposed to medium or ODE. Mouse organotypic brain slice cultures (BSCs) were exposed to medium or ODE with or without MA. Various samples were processed to quantify mitochondrial reactive oxygen species (mt-ROS), mt-DNA, cytochrome c, TFAM, mitochondrial stress markers and mt-DNA-induced signaling via cGAS-STING and TLR9. Data were analyzed and a p value of ≤ 0.05 was considered significant. MA treatment decreased the ODE-induced mt-DNA release into the cytosol. ODE increased MFN1/2 and PINK1 but not DRP1 and MA treatment decreased the MFN2 expression. MA treatment decreased the ODE exposure-induced mt-DNA signaling via cGAS-STING and TLR9. Anti-STING siRNA decreased the ODE-induced increase in IRF3, IFN-β and IBA-1 expression. In BSCs, MA treatment decreased the ODE-induced TNF-α, IL-6 and MFN1. Therefore, OD exposure-induced mt-DNA signaling was curtailed through cytoplasmic NOX-2 inhibition or STING suppression to reduce brain microglial inflammatory response.
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Affiliation(s)
- Nyzil Massey
- Department of Biomedical Sciences, Veterinary Medicine Building, Iowa State University, Ames, IA, 50011, USA
| | - Denusha Shrestha
- Department of Biomedical Sciences, Veterinary Medicine Building, Iowa State University, Ames, IA, 50011, USA
| | - Sanjana Mahadev Bhat
- Department of Biomedical Sciences, Veterinary Medicine Building, Iowa State University, Ames, IA, 50011, USA
| | | | | | - Locke A Karriker
- Department of Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, USA
| | - Anumantha G Kanthasamy
- Department of Biomedical Sciences, Veterinary Medicine Building, Iowa State University, Ames, IA, 50011, USA
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23
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Gaurav R, Mikuls TR, Thiele GM, Nelson AJ, Niu M, Guda C, Eudy JD, Barry AE, Wyatt TA, Romberger DJ, Duryee MJ, England BR, Poole JA. High-throughput analysis of lung immune cells in a combined murine model of agriculture dust-triggered airway inflammation with rheumatoid arthritis. PLoS One 2021; 16:e0240707. [PMID: 33577605 PMCID: PMC7880471 DOI: 10.1371/journal.pone.0240707] [Citation(s) in RCA: 7] [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: 09/29/2020] [Accepted: 12/18/2020] [Indexed: 01/10/2023] Open
Abstract
Rheumatoid arthritis (RA)-associated lung disease is a leading cause of mortality in RA, yet the mechanisms linking lung disease and RA remain unknown. Using an established murine model of RA-associated lung disease combining collagen-induced arthritis (CIA) with organic dust extract (ODE)-induced airway inflammation, differences among lung immune cell populations were analyzed by single cell RNA-sequencing. Additionally, four lung myeloid-derived immune cell populations including macrophages, monocytes/macrophages, monocytes, and neutrophils were isolated by fluorescence cell sorting and gene expression was determined by NanoString analysis. Unsupervised clustering revealed 14 discrete clusters among Sham, CIA, ODE, and CIA+ODE treatment groups: 3 neutrophils (inflammatory, resident/transitional, autoreactive/suppressor), 5 macrophages (airspace, differentiating/recruited, recruited, resident/interstitial, and proliferative airspace), 2 T-cells (differentiating and effector), and a single cluster each of inflammatory monocytes, dendritic cells, B-cells and natural killer cells. Inflammatory monocytes, autoreactive/suppressor neutrophils, and recruited/differentiating macrophages were predominant with arthritis induction (CIA and CIA+ODE). By specific lung cell isolation, several interferon-related and autoimmune genes were disproportionately expressed among CIA and CIA+ODE (e.g. Oasl1, Oas2, Ifit3, Gbp2, Ifi44, and Zbp1), corresponding to RA and RA-associated lung disease. Monocytic myeloid-derived suppressor cells were reduced, while complement genes (e.g. C1s1 and Cfb) were uniquely increased in CIA+ODE mice across cell populations. Recruited and inflammatory macrophages/monocytes and neutrophils expressing interferon-, autoimmune-, and complement-related genes might contribute towards pro-fibrotic inflammatory lung responses following airborne biohazard exposures in setting of autoimmune arthritis and could be predictive and/or targeted to reduce disease burden.
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Affiliation(s)
- Rohit Gaurav
- Division of Allergy and Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
- * E-mail:
| | - Ted R. Mikuls
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, United States of America
- Division of Rheumatology & Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Geoffrey M. Thiele
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, United States of America
- Division of Rheumatology & Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Amy J. Nelson
- Division of Allergy and Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Meng Niu
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Chittibabu Guda
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - James D. Eudy
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Austin E. Barry
- Division of Allergy and Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Todd A. Wyatt
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, United States of America
- Division of Pulmonary, Critical Care & Sleep, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
- Department of Environmental, Agricultural & Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE, United States of America
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Debra J. Romberger
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, United States of America
- Division of Pulmonary, Critical Care & Sleep, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Michael J. Duryee
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, United States of America
- Division of Rheumatology & Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Bryant R. England
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, United States of America
- Division of Rheumatology & Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Jill A. Poole
- Division of Allergy and Immunology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
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24
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Shrestha D, Bhat SM, Massey N, Santana Maldonado C, Rumbeiha WK, Charavaryamath C. Pre-exposure to hydrogen sulfide modulates the innate inflammatory response to organic dust. Cell Tissue Res 2021; 384:129-148. [PMID: 33409657 DOI: 10.1007/s00441-020-03333-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 10/29/2020] [Indexed: 01/31/2023]
Abstract
Animal production units produce and store many contaminants on-site, including organic dust (OD) and hydrogen sulfide (H2S). Workers in these settings report various respiratory disease symptoms. Both OD and H2S have shown to induce lung inflammation. However, impact of co-exposure to both H2S and OD has not been investigated. Therefore, we tested a hypothesis that pre-exposure to H2S modulates the innate inflammatory response of the lungs to organic dust. In a mouse model of H2S and organic dust extract (ODE) exposure, we assessed lung inflammation quantitatively. We exposed human airway epithelial and monocytic cells to medium or H2S alone or H2S followed by ODE and measured cell viability, oxidative stress, and other markers of inflammation. Exposure to 10 ppm H2S followed by ODE increased the lavage fluid leukocytes. However, exposure to 10 ppm H2S alone resulted in changes in tight junction proteins, an increase in mRNA levels of tlr2 and tlr4 as well as ncf1, ncf4, hif1α, and nrf2. H2S alone or H2S and ODE exposure decreased cell viability and increased reactive nitrogen species production. ODE exposure increased the transcripts of tlr2 and tlr4 in both in vitro and in vivo models, whereas increased nfkbp65 transcripts following exposure to ODE and H2S was seen only in in vitro model. H2S alone and H2S followed by ODE exposure increased the levels of IL-1β. We conclude that pre-exposure to H2S modulates lung innate inflammatory response to ODE.
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Affiliation(s)
- Denusha Shrestha
- Biomedical Sciences, Iowa State University, Ames, IA, 50011, USA
| | - Sanjana Mahadev Bhat
- Biomedical Sciences, Iowa State University, Ames, IA, 50011, USA.,Immunobiology Interdepartmental Graduate Program, Iowa State University, Ames, IA, 50011, USA
| | - Nyzil Massey
- Biomedical Sciences, Iowa State University, Ames, IA, 50011, USA
| | | | - Wilson K Rumbeiha
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA, USA
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25
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Wyatt TA, Nemecek M, Chandra D, DeVasure JM, Nelson AJ, Romberger DJ, Poole JA. Organic dust-induced lung injury and repair: Bi-directional regulation by TNFα and IL-10. J Immunotoxicol 2020; 17:153-162. [PMID: 32634062 PMCID: PMC11238278 DOI: 10.1080/1547691x.2020.1776428] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/20/2020] [Accepted: 05/27/2020] [Indexed: 12/15/2022] Open
Abstract
Exposure to organic dust increases chronic airway inflammatory disorders. Effective treatment strategies are lacking. It has been reported that hog barn dust extracts (HDE) induce TNFα through protein kinase C (PKC) activation and that lung inflammation is enhanced in scavenger receptor A (SRA/CD204) knockout (KO) mice following HDE. Because interleukin (IL)-10 production can limit excessive inflammation, it was hypothesized here that HDE-induced IL-10 would require CD204 to effect inflammatory responses. C57BL/6 wild-type (WT), SRA KO, and IL-10 KO mice were intranasally challenged daily for 8 days with HDE and subsequently rested for 3 days with/without recombinant IL-10 (rIL-10) treatment. Primary peritoneal macrophages (PM) and murine alveolar macrophages (MH-S cells) were treated in vitro with HDE, SRA ligand (fucoidan), rIL-10, and/or PKC isoform inhibitors. HDE induced in vivo lung IL-10 in WT, but not SRA KO mice, and similar trends were demonstrated in isolated PM from same treated mice. Lung lymphocyte aggregates and neutrophils were elevated in in vivo HDE-treated SRA and IL-10 KO mice after a 3-d recovery, and treatment during recovery with rIL-10 abrogated these responses. In vitro rIL-10 treatment reduced HDE-stimulated TNFα release in MH-S and WT PM. In SRA KO macrophages, there was reduced IL-10 and PKC zeta (ζ) activity and increased TNFα following in vitro HDE stimulation. Similarly, blocking SRA (24 hr fucoidan pre-treatment) resulted in enhanced HDE-stimulated macrophage TNFα and decreased IL-10 and PKCζ activation. PKCζ inhibitors blocked HDE-stimulated IL-10, but not TNFα. Collectively, HDE stimulates IL-10 by an SRA- and PKCζ-dependent mechanism to regulate TNFα. Enhancing resolution of dust-mediated lung inflammation through targeting IL-10 and/or SRA may represent new approaches to therapeutic interventions.
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Affiliation(s)
- T A Wyatt
- Pulmonary, Critical Care, and Sleep, University of Nebraska Medical Center, Omaha, NE, USA
- Department of Environmental, Agricultural and Occupational Health, University of Nebraska Medical Center, Omaha, NE, USA
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, USA
| | - M Nemecek
- Pulmonary, Critical Care, and Sleep, University of Nebraska Medical Center, Omaha, NE, USA
- Department of Environmental, Agricultural and Occupational Health, University of Nebraska Medical Center, Omaha, NE, USA
| | - D Chandra
- Pulmonary, Critical Care, and Sleep, University of Nebraska Medical Center, Omaha, NE, USA
| | - J M DeVasure
- Pulmonary, Critical Care, and Sleep, University of Nebraska Medical Center, Omaha, NE, USA
| | - A J Nelson
- Allergy and Immunology Divisions, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - D J Romberger
- Pulmonary, Critical Care, and Sleep, University of Nebraska Medical Center, Omaha, NE, USA
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, USA
| | - J A Poole
- Allergy and Immunology Divisions, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
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Xiong L, Xiong L, Ye H, Ma WL. Animal models of rheumatoid arthritis-associated interstitial lung disease. IMMUNITY INFLAMMATION AND DISEASE 2020; 9:37-47. [PMID: 33216465 PMCID: PMC7860593 DOI: 10.1002/iid3.377] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 11/01/2020] [Accepted: 11/03/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Rheumatoid arthritis-associated interstitial lung disease (RA-ILD) is an irreversible pathologic condition of unknown cause, commonly involving the joint and the lung with variable amounts of fibrotic change. In contrast to rheumatoid arthritis or other chronic interstitial lung diseases such as interstitial pulmonary fibrosis, there is so far no extensively accepted or implemented animal model for this disease. AIMS To provide guidance for those who are investigating the pathogenesis of RA-ILD with animal models. MATERIALS AND METHODS An analysis of papers from PubMed during 1978-2020. RESULTS We outline the present status quo for animal models of RA-ILD about their modeling methods and pathogenesis, compare their pros and cons with respect to their ability to mimic the clinical and histological features of human disease and discuss their applicability for future research. DISCUSSION There is no doubt that these animal models do provide valuable information relating to the pathogenesis of RA-ILD and the development of effective therapeutic drugs. Nevertheless, these animal models can not entirely recapitulate clinical pathology and have some limitations in experimental research application. Therefore, it should be emphasized that we should improve and explore animal models in more accordance with the pathogenesis and clinical characteristics of human RA-ILD. CONCLUSION These established animal models of the disease can significantly progress our understanding of the etiology of RA-ILD, the fundamental mechanisms of its pathogenesis and the identification of new bio-markers, and can contribute to the development and implementation of novel treatment strategies.
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Affiliation(s)
- Li Xiong
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liang Xiong
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hong Ye
- Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan, China
| | - Wan-Li Ma
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan, China
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Meganathan V, Moyana R, Natarajan K, Kujur W, Kusampudi S, Mulik S, Boggaram V. Bacterial extracellular vesicles isolated from organic dust induce neutrophilic inflammation in the lung. Am J Physiol Lung Cell Mol Physiol 2020; 319:L893-L907. [PMID: 32996778 DOI: 10.1152/ajplung.00107.2020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Inhalation of organic dust is an occupational hazard leading to the development of respiratory symptoms and respiratory diseases. Bioaerosols from concentrated animal feeding operations are rich in bacteria and could carry bacterial extracellular vesicles (EVs) that could induce lung inflammation. It is not known if organic dust contains bacterial EVs and whether they modulate lung inflammation. Herein, we show that poultry organic dust contains bacterial EVs (dust EVs) that induce lung inflammation. Treatment of airway epithelial cells, THP-1-monocytes and -macrophages with dust EVs rapidly induced IL-8, IL-6, ICAM-1, proIL-1β, and TNF-α levels. In airway epithelial cells, induction of inflammatory mediators was due to increased mRNA levels and NF-κB activation. Induction of inflammatory mediators by dust EVs was not inhibited by polymyxin B. Single and repeated treatments of mice with dust EVs increased lung KC, IL-6, and TNF-α levels without significantly altering IL-17A levels. Increases in cytokines were associated with enhanced neutrophil infiltration into the lung. Repeated treatments of mice with dust EVs increased lung mean linear intercept and increased collagen deposition around airways indicating lung remodeling. Peribronchial cell infiltrates and airway epithelial thickening were also observed in treated mice. Because bacterial EVs are nanometer-sized particles, they can reach and accumulate in the bronchiolar and alveolar regions causing lung injury leading to the development of respiratory diseases. Our studies have provided new evidence for the presence of bacterial EVs in organic dust and for their role as one of the causative agents of organic dust-induced lung inflammation and lung injury.
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Affiliation(s)
- Velmurugan Meganathan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, Tyler, Texas
| | - Regina Moyana
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, Tyler, Texas
| | - Kartiga Natarajan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, Tyler, Texas
| | - Weshely Kujur
- Department of Pulmonary Immunology, University of Texas Health Science Center at Tyler, Tyler, Texas
| | - Shilpa Kusampudi
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, Tyler, Texas
| | - Sachin Mulik
- Department of Pulmonary Immunology, University of Texas Health Science Center at Tyler, Tyler, Texas
| | - Vijay Boggaram
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, Tyler, Texas
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A High Docosahexaenoic Acid Diet Alters the Lung Inflammatory Response to Acute Dust Exposure. Nutrients 2020; 12:nu12082334. [PMID: 32759853 PMCID: PMC7468878 DOI: 10.3390/nu12082334] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/25/2020] [Accepted: 07/30/2020] [Indexed: 02/07/2023] Open
Abstract
Agricultural workers are at risk for the development of acute and chronic lung diseases due to their exposure to organic agricultural dusts. A diet intervention using the omega-3 fatty acid docosahexaenoic acid (DHA) has been shown to be an effective therapeutic approach for alleviating a dust-induced inflammatory response. We thus hypothesized a high-DHA diet would alter the dust-induced inflammatory response through the increased production of specialized pro-resolving mediators (SPMs). Mice were pre-treated with a DHA-rich diet 4 weeks before being intranasally challenged with a single dose of an extract made from dust collected from a concentrated swine feeding operation (HDE). This omega-3-fatty-acid-rich diet led to reduced arachidonic acid levels in the blood, enhanced macrophage recruitment, and increased the production of the DHA-derived SPM Resolvin D1 (RvD1) in the lung following HDE exposure. An assessment of transcript-level changes in the immune response demonstrated significant differences in immune pathway activation and alterations of numerous macrophage-associated genes among HDE-challenged mice fed a high DHA diet. Our data indicate that consuming a DHA-rich diet leads to the enhanced production of SPMs during an acute inflammatory challenge to dust, supporting a role for dietary DHA supplementation as a potential therapeutic strategy for reducing dust-induced lung inflammation.
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Xia L, Wang X, Liu L, Fu J, Xiao W, Liang Q, Han X, Huang S, Sun L, Gao Y, Zhang C, Yang L, Wang L, Qian L, Zhou Y. lnc-BAZ2B promotes M2 macrophage activation and inflammation in children with asthma through stabilizing BAZ2B pre-mRNA. J Allergy Clin Immunol 2020; 147:921-932.e9. [PMID: 32712329 DOI: 10.1016/j.jaci.2020.06.034] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 05/31/2020] [Accepted: 06/24/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Dysregulation of long noncoding RNAs (lncRNAs) is associated with a variety of human diseases; however, whether they have a role in childhood asthma is unknown. OBJECTIVE We sought to determine the differential expression profiles of lncRNAs in PBMCs of children with asthma and the mechanisms underlying the effects of lncRNAs on the pathogenesis of asthma. METHODS The differential expression profiles of lncRNAs were analyzed by transcriptome microarray. The effects and mechanisms by which lncRNAs influence macrophage activation were detected by real-time quantitative PCR, Western blot, RNase protection assay, and chromatin immunoprecipitation assay. The roles played by lncRNAs in asthma were tested in a cockroach allergen extract (CRE)-induced mouse model. RESULTS We identified 719 lncRNAs that were differentially expressed in PBMCs of children with asthma, 502 of which were upregulated and 217 were downregulated. An lncRNA of unknown function, lnc-BAZ2B, was dominantly expressed in monocytes and significantly upregulated in children with asthma. lnc-BAZ2B promotes M2 macrophage activation by enhancing BAZ2B expression and exacerbated lung inflammation in an M2 macrophage-associated CRE-induced asthma model. Mechanistically, lnc-BAZ2B promoted the expression of its cis target gene BAZ2B by stabilizing its pre-mRNA. BAZ2B, a reader of H3K14ac modification, enhanced the transcription of IRF4 and promoted M2 macrophage activation. lnc-BAZ2B expression was correlated with that of BAZ2B in PBMCs from children with asthma. Baz2b knockdown could alleviate asthma severity in a CRE-induced asthma model. CONCLUSION lnc-BAZ2B promotes M2 macrophage activation and inflammation in children with asthma and may serve as a potential therapeutic and diagnostic target in children with asthma.
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Affiliation(s)
- Li Xia
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Xiang Wang
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Lijuan Liu
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China; Department of Respiratory Medicine, Children's Hospital of Fudan University, Shanghai, China
| | - Jinrong Fu
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China; Department of Respiratory Medicine, Children's Hospital of Fudan University, Shanghai, China
| | - Wenfeng Xiao
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Qiuyan Liang
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Xiao Han
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Saihua Huang
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Licheng Sun
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Yajing Gao
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Caiyan Zhang
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Lan Yang
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Libo Wang
- Department of Respiratory Medicine, Children's Hospital of Fudan University, Shanghai, China
| | - Liling Qian
- Department of Respiratory Medicine, Children's Hospital of Fudan University, Shanghai, China.
| | - Yufeng Zhou
- Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China; National Health Commission Key Laboratory of Neonatal Diseases, Fudan University, Shanghai, China.
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30
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Natarajan K, Gangam K, Meganathan V, Gottipati KR, Mitchell C, Boggaram V. Organic dust inhibits surfactant protein expression by reducing thyroid transcription factor-1 levels in human lung epithelial cells. Innate Immun 2020; 25:118-131. [PMID: 30774012 PMCID: PMC6830861 DOI: 10.1177/1753425919827360] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Exposure to organic dust is a risk factor for the development of respiratory
diseases. Surfactant proteins (SP) reduce alveolar surface tension and modulate
innate immune responses to control lung inflammation. Therefore, changes in SP
levels could contribute to the development of organic-dust-induced respiratory
diseases. Because information on the effects of organic dust on SP levels is
lacking, we studied the effects of dust from a poultry farm on SP expression. We
found that dust extract reduced SP-A and SP-B mRNA and protein levels in H441
human lung epithelial cells by inhibiting their promoter activities, but did not
have any effect on SP-D protein levels. Dust extract also reduced SP-A and SP-C
levels in primary human alveolar epithelial cells. The inhibitory effects were
not due to LPS or protease activities present in dust extract or mediated via
oxidative stress, but were dependent on a heat-labile factor(s). Thyroid
transcription factor-1, a key transcriptional activator of SP expression, was
reduced in dust-extract-treated cells, indicating that its down-regulation
mediates inhibition of SP levels. Our study implies that down-regulation of SP
levels by organic dust could contribute to the development of lung inflammation
and respiratory diseases in humans.
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Affiliation(s)
- Kartiga Natarajan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Keerthi Gangam
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Velmurugan Meganathan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Koteswara R Gottipati
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Courtney Mitchell
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Vijay Boggaram
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
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31
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Johnson AN, Harkema JR, Nelson AJ, Dickinson JD, Kalil J, Duryee MJ, Thiele GM, Kumar B, Singh AB, Gaurav R, Glover SC, Tang Y, Romberger DJ, Kielian T, Poole JA. MyD88 regulates a prolonged adaptation response to environmental dust exposure-induced lung disease. Respir Res 2020; 21:97. [PMID: 32321514 PMCID: PMC7178993 DOI: 10.1186/s12931-020-01362-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 04/14/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Environmental organic dust exposures enriched in Toll-like receptor (TLR) agonists can reduce allergic asthma development but are associated with occupational asthma and chronic bronchitis. The TLR adaptor protein myeloid differentiation factor88 (MyD88) is fundamental in regulating acute inflammatory responses to organic dust extract (ODE), yet its role in repetitive exposures is unknown and could inform future strategies. METHODS Wild-type (WT) and MyD88 knockout (KO) mice were exposed intranasally to ODE or saline daily for 3 weeks (repetitive exposure). Repetitively exposed animals were also subsequently rested with no treatments for 4 weeks followed by single rechallenge with saline/ODE. RESULTS Repetitive ODE exposure induced neutrophil influx and release of pro-inflammatory cytokines and chemokines were profoundly reduced in MyD88 KO mice. In comparison, ODE-induced cellular aggregates, B cells, mast cell infiltrates and serum IgE levels remained elevated in KO mice and mucous cell metaplasia was increased. Expression of ODE-induced tight junction protein(s) was also MyD88-dependent. Following recovery and then rechallenge with ODE, inflammatory mediators, but not neutrophil influx, was reduced in WT mice pretreated with ODE coincident with increased expression of IL-33 and IL-10, suggesting an adaptation response. Repetitively exposed MyD88 KO mice lacked inflammatory responsiveness upon ODE rechallenge. CONCLUSIONS MyD88 is essential in mediating the classic airway inflammatory response to repetitive ODE, but targeting MyD88 does not reduce mucous cell metaplasia, lymphocyte influx, or IgE responsiveness. TLR-enriched dust exposures induce a prolonged adaptation response that is largely MyD88-independent. These findings demonstrate the complex role of MyD88-dependent signaling during acute vs. chronic organic dust exposures.
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Affiliation(s)
- Amber N. Johnson
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE 68198-5990 USA
| | - Jack R. Harkema
- grid.17088.360000 0001 2150 1785Pathobiology & Diagnostic Investigation, Institute for Integrative Toxicology, College of Veterinary Medicine, Michigan State University, East Lansing, MI USA
| | - Amy J. Nelson
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE 68198-5990 USA
| | - John D. Dickinson
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE 68198-5990 USA
| | - Julianna Kalil
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE 68198-5990 USA
| | - Michael J. Duryee
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE 68198-5990 USA ,Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE USA
| | - Geoffrey M. Thiele
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE 68198-5990 USA ,Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE USA
| | - Balawant Kumar
- grid.266813.80000 0001 0666 4105Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE USA
| | - Amar B. Singh
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE USA ,grid.266813.80000 0001 0666 4105Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE USA
| | - Rohit Gaurav
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE 68198-5990 USA
| | - Sarah C. Glover
- grid.410721.10000 0004 1937 0407Department of Medicine, University of Mississippi Medical Center, Jackson, MS USA
| | - Ying Tang
- grid.15276.370000 0004 1936 8091Department of Medicine, University of Florida, Gainesville, FL USA
| | - Debra J. Romberger
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE 68198-5990 USA ,Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE USA
| | - Tammy Kielian
- grid.266813.80000 0001 0666 4105Department of Microbiology and Pathology, University of Nebraska Medical Center, Omaha, NE USA
| | - Jill A. Poole
- grid.266813.80000 0001 0666 4105Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE 68198-5990 USA
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Poole JA, Nordgren TM, Heires AJ, Nelson AJ, Katafiasz D, Bailey KL, Romberger DJ. Amphiregulin modulates murine lung recovery and fibroblast function following exposure to agriculture organic dust. Am J Physiol Lung Cell Mol Physiol 2020; 318:L180-L191. [PMID: 31693392 PMCID: PMC6985879 DOI: 10.1152/ajplung.00039.2019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 10/22/2019] [Accepted: 10/29/2019] [Indexed: 01/10/2023] Open
Abstract
Exposure to agricultural bioaerosols can lead to chronic inflammatory lung diseases. Amphiregulin (AREG) can promote the lung repair process but can also lead to fibrotic remodeling. The objective of this study was to determine the role of AREG in altering recovery from environmental dust exposure in a murine in vivo model and in vitro using cultured human and murine lung fibroblasts. C57BL/6 mice were intranasally exposed to swine confinement facility dust extract (DE) or saline daily for 1 wk or allowed to recover for 3-7 days while being treated with an AREG-neutralizing antibody or recombinant AREG. Treatment with the anti-AREG antibody prevented resolution of DE exposure-induced airway influx of total cells, neutrophils, and macrophages and increased levels of TNF-α, IL-6, and CXCL1. Neutrophils and activated macrophages (CD11c+CD11bhi) persisted after recovery in lung tissues of anti-AREG-treated mice. In murine and human lung fibroblasts, DE induced the release of AREG and inflammatory cytokines. Fibroblast recellularization of primary human lung mesenchymal matrix scaffolds and wound closure was inhibited by DE and enhanced with recombinant AREG alone. AREG treatment rescued the DE-induced inhibitory fibroblast effects. AREG intranasal treatment for 3 days during recovery phase reduced repetitive DE-induced airway inflammatory cell influx and cytokine release. Collectively, these studies demonstrate that inhibition of AREG reduced, whereas AREG supplementation promoted, the airway inflammatory recovery response following environmental bioaerosol exposure, and AREG enhanced fibroblast function, suggesting that AREG could be targeted in agricultural workers repetitively exposed to organic dust environments to potentially prevent and/or reduce disease.
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Affiliation(s)
- Jill A Poole
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Tara M Nordgren
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, California
| | - Art J Heires
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Amy J Nelson
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Dawn Katafiasz
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Kristina L Bailey
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, Nebraska
| | - Debra J Romberger
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, Nebraska
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33
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Poole JA, Thiele GM, Janike K, Nelson AJ, Duryee MJ, Rentfro K, England BR, Romberger DJ, Carrington JM, Wang D, Swanson BJ, Klassen LW, Mikuls TR. Combined Collagen-Induced Arthritis and Organic Dust-Induced Airway Inflammation to Model Inflammatory Lung Disease in Rheumatoid Arthritis. J Bone Miner Res 2019; 34:1733-1743. [PMID: 30995344 PMCID: PMC6744331 DOI: 10.1002/jbmr.3745] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 03/15/2019] [Accepted: 04/03/2019] [Indexed: 12/21/2022]
Abstract
Rheumatoid arthritis (RA) is characterized by extra-articular involvement including lung disease, yet the mechanisms linking the two conditions are poorly understood. The collagen-induced arthritis (CIA) model was combined with the organic dust extract (ODE) airway inflammatory model to assess bone/joint-lung inflammatory outcomes. DBA/1J mice were intranasally treated with saline or ODE daily for 5 weeks. CIA was induced on days 1 and 21. Treatment groups included sham (saline injection/saline inhalation), CIA (CIA/saline), ODE (saline/ODE), and CIA + ODE (CIA/ODE). Arthritis inflammatory scores, bones, bronchoalveolar lavage fluid, lung tissues, and serum were assessed. In DBA/1J male mice, arthritis was increased in CIA + ODE > CIA > ODE versus sham. Micro-computed tomography (µCT) demonstrated that loss of BMD and volume and deterioration of bone microarchitecture was greatest in CIA + ODE. However, ODE-induced airway neutrophil influx and inflammatory cytokine/chemokine levels in lavage fluids were increased in ODE > CIA + ODE versus sham. Activated lung CD11c+ CD11b+ macrophages were increased in ODE > CIA + ODE > CIA pattern, whereas lung hyaluronan, fibronectin, and amphiregulin levels were greatest in CIA + ODE. Serum autoantibody and inflammatory marker concentrations varied among experimental groups. Compared with male mice, female mice showed less articular and pulmonary disease. The interaction of inhalation-induced airway inflammation and arthritis induction resulted in compartmentalized responses with the greatest degree of arthritis and bone loss in male mice with combined exposures. Data also support suppression of the lung inflammatory response, but increases in extracellular matrix protein deposition/interstitial disease in the setting of arthritis. This coexposure model could be exploited to better understand and treat RA-lung disease. © 2019 American Society for Bone and Mineral Research.
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Affiliation(s)
- Jill A. Poole
- Department of Internal Medicine, Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center (UNMC)
| | - Geoffrey M. Thiele
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE
- Department of Internal Medicine, Rheumatology Division, UNMC
| | - Katherine Janike
- Department of Internal Medicine, Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center (UNMC)
| | - Amy J. Nelson
- Department of Internal Medicine, Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center (UNMC)
| | - Michael J. Duryee
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE
- Department of Internal Medicine, Rheumatology Division, UNMC
| | - Kathryn Rentfro
- Department of Internal Medicine, Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center (UNMC)
| | - Bryant R. England
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE
- Department of Internal Medicine, Rheumatology Division, UNMC
| | - Debra J. Romberger
- Department of Internal Medicine, Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center (UNMC)
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE
| | - Joseph M. Carrington
- Department of Internal Medicine, Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center (UNMC)
| | | | | | - Lynell W. Klassen
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE
- Department of Internal Medicine, Rheumatology Division, UNMC
| | - Ted R. Mikuls
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE
- Department of Internal Medicine, Rheumatology Division, UNMC
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Knoell DL, Smith DA, Sapkota M, Heires AJ, Hanson CK, Smith LM, Poole JA, Wyatt TA, Romberger DJ. Insufficient zinc intake enhances lung inflammation in response to agricultural organic dust exposure. J Nutr Biochem 2019; 70:56-64. [PMID: 31153019 PMCID: PMC10575612 DOI: 10.1016/j.jnutbio.2019.04.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 03/18/2019] [Accepted: 04/25/2019] [Indexed: 11/15/2022]
Abstract
Organic dust exposure particularly within hog confinement facilities is a significant cause of airway inflammation and lung disease. In a cohort of Midwestern veterans with COPD and agricultural work exposure we observed reduced zinc intakes which were associated with decreased lung function. Because insufficient zinc intake is common within the U.S. and a potent modulator of innate immune function, we sought to determine whether deficits in zinc intake would impact the airway inflammatory response to hog confinement facility dust extract (HDE). Adult male C57BL/6 mice were randomized to zinc deficient or matched zinc sufficient diets for 3 weeks and subsequently treated with intranasal HDE inhalation or saline once or daily for 3 weeks while maintained on specific diets. Lavage fluid and lung tissue was collected. Conditions of zinc deficiency were also studied in macrophages exposed to HDE. Single and repetitive HDE inhalation exposure resulted in increased influx of total cells and neutrophils, increased mediator hyper-responsiveness (TNFα, IL-6, CXCL1, and amphiregulin), and enhanced tissue pathology that was more pronounced in zinc deficient mice compared to normal dietary counterparts. Airway inflammation was most pronounced in zinc deficient mice treated with repetitive HDE for 3 weeks. Similarly, macrophages maintained in a zinc deficient environment exhibited increased CXCL1 and IL-23 production as a result of increased NF-κB activation. Conclusion: Given the relatively high incidence of dietary deficiencies in agriculture workers, we anticipate that zinc intake, or a lack thereof, may play an important role in modulating the host response to organic dust exposure.
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Affiliation(s)
- Daren L Knoell
- The University of Nebraska Medical Center College of Pharmacy, Omaha, NE 68198.
| | - Deandra A Smith
- The University of Nebraska Medical Center College of Pharmacy, Omaha, NE 68198.
| | - Muna Sapkota
- The University of Nebraska Medical Center College of Pharmacy, Omaha, NE 68198.
| | - Art J Heires
- The University of Nebraska Medical Center College of Medicine, Omaha, NE 68198.
| | - Corrine K Hanson
- The University of Nebraska Medical Center College of Allied Health, Omaha, NE 68198.
| | - Lynette M Smith
- The University of Nebraska Medical Center College of Public Health, Omaha, NE 68198
| | - Jill A Poole
- The University of Nebraska Medical Center College of Medicine, Omaha, NE 68198.
| | - Todd A Wyatt
- The University of Nebraska Medical Center College of Medicine, Omaha, NE 68198; The University of Nebraska Medical Center College of Public Health, Omaha, NE 68198; VA Nebraska-Western Iowa Health Care System, Omaha, NE 68105.
| | - Debra J Romberger
- The University of Nebraska Medical Center College of Medicine, Omaha, NE 68198.
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Natarajan K, Meganathan V, Mitchell C, Boggaram V. Organic dust induces inflammatory gene expression in lung epithelial cells via ROS-dependent STAT-3 activation. Am J Physiol Lung Cell Mol Physiol 2019; 317:L127-L140. [PMID: 31042082 DOI: 10.1152/ajplung.00448.2018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Exposure to dust in agricultural and animal environments, known as organic dust, is associated with the development of respiratory symptoms and respiratory diseases. Inflammation is a key feature of lung pathologies associated with organic dust exposure, and exposure to organic dust induces the expression of several immune and inflammatory mediators. However, information on transcription factors and cellular and molecular mechanisms controlling the production of immune and inflammatory mediators induced by organic dust is limited. In this study, we have identified STAT-3 as an important transcription factor controlling the induction of expression of immune and inflammatory mediators by poultry dust extracts in airway epithelial cells and in mouse lungs and delineated the cellular pathway for STAT-3 activation. Poultry dust extract activated STAT-3 phosphorylation in Beas2B and normal human bronchial epithelial cells and in mouse lungs. Chemical inhibition and siRNA knockdown of STAT-3 suppressed induction of immune and inflammatory mediator expression. Antioxidants suppressed the increase of STAT-3 phosphorylation induced by poultry dust extract indicating that oxidative stress [elevated reactive oxygen species (ROS) levels] is important for the activation. Chemical inhibition and siRNA knockdown experiments demonstrated that STAT-3 activation is dependent on the activation of nonreceptor tyrosine-protein kinase 2 (TYK2) and epidermal growth factor receptor (EGFR) tyrosine kinases. Our studies show that poultry dust extract controls the induction of immune and inflammatory mediator expression via a cellular pathway involving oxidative stress-mediated STAT-3 activation by TYK2 and EGFR tyrosine kinases.
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Affiliation(s)
- Kartiga Natarajan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler , Tyler, Texas
| | - Velmurugan Meganathan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler , Tyler, Texas
| | - Courtney Mitchell
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler , Tyler, Texas
| | - Vijay Boggaram
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler , Tyler, Texas
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Dodmane PR, Schulte NA, Heires AJ, Band H, Romberger DJ, Toews ML. Biphasic changes in airway epithelial cell EGF receptor binding and phosphorylation induced by components of hogbarn dust. Exp Lung Res 2019; 44:443-454. [PMID: 30862200 DOI: 10.1080/01902148.2019.1575931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE OF THE STUDY Workers in enclosed hogbarns experience an increased incidence of airway inflammation and obstructive lung disease, and an aqueous hogbarn dust extract (HDE) induces multiple inflammation-related responses in cultured airway epithelial cells. Epidermal growth factor receptor (EGFR) phosphorylation and activation has been identified as one important mediator of inflammatory cytokine release from these cells. The studies here investigated both early and late phase adaptive changes in EGFR binding properties and subcellular localization induced by exposure of cells to HDE. MATERIALS AND METHODS Cell surface EGFRs were quantified as binding to intact cells on ice. EGFR phosphorylation, expression, and localization were assessed with anti-EGFR antibodies and either blotting or confocal microscopy. RESULTS In BEAS-2B and primary human bronchial epithelial cells, HDE induced decreases in cell surface EGFR binding following both 15-min and 18-h exposures. In contrast, H292 cells exhibited only the 15-min decrease, with binding near the control level at 18 hr. Confocal microscopy showed that the 15-min decrease in binding is due to EGFR endocytosis. Although total EGFR immunoreactivity decreased markedly at 18 hr in confocal microscopy with BEAS-2B cells, immunoblots showed no loss of EGFR protein. HDE stimulated EGFR phosphorylation at both 15 min and 18 hr in BEAS-2B cells and primary cells, but only at 15 min in H292 cells, indicating that the different EGFR binding changes among these cell types is likely related to their different time-dependent changes in phosphorylation. CONCLUSIONS These studies extend the evidence for EGFRs as important cellular targets for components of HDE and they reveal novel patterns of EGFR phosphorylation and binding changes that vary among airway epithelial cell types. The results provide both impetus and convenient assays for identifying the EGFR-activating components and pathways that likely contribute to hogbarn dust-induced lung disease in agricultural workers.
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Affiliation(s)
- Puttappa R Dodmane
- a Department of Pharmacology and Experimental Neuroscience , University of Nebraska Medical Center , Omaha , NE , USA
| | - Nancy A Schulte
- a Department of Pharmacology and Experimental Neuroscience , University of Nebraska Medical Center , Omaha , NE , USA
| | - Art J Heires
- b Veterans Affairs Nebraska-Western Iowa Health Care System , Research Service , Omaha , NE , USA.,c Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE , USA
| | - Hamid Band
- d Eppley Institute for Research in Cancer and Allied Diseases , University of Nebraska Medical Center , Omaha , NE , USA
| | - Debra J Romberger
- b Veterans Affairs Nebraska-Western Iowa Health Care System , Research Service , Omaha , NE , USA.,c Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE , USA
| | - Myron L Toews
- a Department of Pharmacology and Experimental Neuroscience , University of Nebraska Medical Center , Omaha , NE , USA
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Warren KJ, Dickinson JD, Nelson AJ, Wyatt TA, Romberger DJ, Poole JA. Ovalbumin-sensitized mice have altered airway inflammation to agriculture organic dust. Respir Res 2019; 20:51. [PMID: 30845921 PMCID: PMC6407255 DOI: 10.1186/s12931-019-1015-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 02/22/2019] [Indexed: 12/13/2022] Open
Abstract
Agriculture exposures are associated with reducing the risk of allergy and asthma in early life; yet, repeated exposures later in life are associated with chronic bronchitis and obstructive pulmonary diseases. The objective of this study was to investigate the airway inflammatory response to organic dust extract (ODE) in mice with established ovalbumin (OVA)-induced experimental asthma. C57BL/6 mice were either OVA sensitized/aerosol-exposed or saline (Sal) sensitized/aerosol-challenged. Both groups were then subsequently challenged once with intranasal saline or swine confinement ODE to obtain 4 treatment groups of Sal-Sal, Sal-ODE, OVA-Sal, and OVA-ODE. Airway hyper-responsiveness (AHR) to methacholine, bronchiolar lavage fluid, lung tissues, and serum were collected. Intranasal inhalation of ODE in OVA-treated (asthmatic) mice (OVA-ODE) increased AHR and total cellular influx marked by elevated neutrophil and eosinophil counts. Flow cytometry analysis further demonstrated that populations of CD11chi dendritic cells (DC), CD3+ T cells, CD19+ B cells, and NKp46+ group 3 innate lymphoid cells (ILC3) were increased in lavage fluid of OVA-ODE mice as compared to ODE or OVA alone. Alveolar macrophages, DC, and T cells were significantly increased with co-exposure to OVA-ODE as compared to OVA alone. Lung ILC2 and ILC3 were only increased in OVA-Sal mice. Cytokine/chemokine levels varied with exposure to OVA-ODE reflecting an additive mixture of the pro- and allergic-inflammatory profiles. Collectively, ODE increased airway inflammatory cells and chemotactic mediator release in allergic (OVA) sensitized mice to suggest that persons with allergy/asthma be identified and warned prior to the occupational exposure of potentially worsening airway disease.
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Affiliation(s)
- Kristi J. Warren
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985900 Nebraska Medical Center, Omaha, NE 68198-5910 USA
| | - John D. Dickinson
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985900 Nebraska Medical Center, Omaha, NE 68198-5910 USA
| | - Amy J. Nelson
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985900 Nebraska Medical Center, Omaha, NE 68198-5910 USA
| | - Todd A. Wyatt
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985900 Nebraska Medical Center, Omaha, NE 68198-5910 USA
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105 USA
- Department of Environmental, Agricultural, and Occupational Health, University of Nebraska Medical Center, Omaha, NE 68198 USA
| | - Debra J. Romberger
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985900 Nebraska Medical Center, Omaha, NE 68198-5910 USA
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105 USA
| | - Jill A. Poole
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985900 Nebraska Medical Center, Omaha, NE 68198-5910 USA
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Dickinson JD, Sweeter JM, Staab EB, Nelson AJ, Bailey KL, Warren KJ, Jaramillo AM, Dickey BF, Poole JA. MyD88 controls airway epithelial Muc5ac expression during TLR activation conditions from agricultural organic dust exposure. Am J Physiol Lung Cell Mol Physiol 2019; 316:L334-L347. [PMID: 30358438 PMCID: PMC6397350 DOI: 10.1152/ajplung.00206.2018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 10/19/2018] [Accepted: 10/21/2018] [Indexed: 02/04/2023] Open
Abstract
Inflammation from airborne microbes can overwhelm compensatory mucociliary clearance mechanisms, leading to mucous cell metaplasia. Toll-like receptor (TLR) activation via myeloid differentiation factor 88 (MyD88) signaling is central to pathogen responses. We have previously shown that agricultural organic dust extract (ODE), with abundant microbial component diversity, activates TLR-induced airway inflammation. With the use of an established model, C57BL/6J wild-type (WT) and global MyD88 knockout (KO) mice were treated with intranasal inhalation of ODE or saline, daily for 1 wk. ODE primarily increased mucin (Muc)5ac levels relative to Muc5b. Compared with ODE-challenged WT mice, ODE-challenged, MyD88-deficient mice demonstrated significantly increased Muc5ac immunostaining, protein levels by immunoblot, and expression by quantitative PCR. The enhanced Muc5ac levels in MyD88-deficient mice were not explained by differences in the differentiation program of airway secretory cells in naïve mice. Increased Muc5ac levels in MyD88-deficient mice were also not explained by augmented inflammation, IL-17A, or neutrophil elastase levels. Furthermore, the enhanced airway mucins in the MyD88-deficient mice were not due to defective secretion, as the mucin secretory capacity of MyD88-KO mice remained intact. Finally, ODE-induced Muc5ac levels were enhanced in MyD88-deficient airway epithelial cells in vitro. In conclusion, MyD88 deficiency enhances airway mucous cell metaplasia under environments with high TLR activation.
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Affiliation(s)
- John D Dickinson
- Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska
| | - Jenea M Sweeter
- Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska
| | - Elizabeth B Staab
- Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska
| | - Amy J Nelson
- Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska
| | - Kristina L Bailey
- Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska
| | - Kristi J Warren
- Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska
| | - Ana Maria Jaramillo
- Department of Pulmonary Medicine, MD Anderson Cancer Center , Houston, Texas
| | - Burton F Dickey
- Department of Pulmonary Medicine, MD Anderson Cancer Center , Houston, Texas
| | - Jill A Poole
- Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska
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Nelson AJ, Roy SK, Warren K, Janike K, Thiele GM, Mikuls TR, Romberger DJ, Wang D, Swanson B, Poole JA. Sex differences impact the lung-bone inflammatory response to repetitive inhalant lipopolysaccharide exposures in mice. J Immunotoxicol 2018; 15:73-81. [PMID: 29648480 DOI: 10.1080/1547691x.2018.1460425] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Skeletal health consequences associated with inflammatory diseases of the airways significantly contribute to morbidity. Sex differences have been described independently for lung and bone diseases. Repetitive inhalant exposure to lipopolysaccharide (LPS) induces bone loss and deterioration in male mice, but comparison effects in females are unknown. Using an intranasal inhalation exposure model, 8-week-old C57BL/6 male and female mice were treated daily with LPS (100 ng) or saline for 3 weeks. Bronchoalveolar lavage fluids, lung tissues, tibias, bone marrow cells, and blood were collected. LPS-induced airway neutrophil influx, interleukin (IL)-6 and neutrophil chemoattractant levels, and bronchiolar inflammation were exaggerated in male animals as compared to female mice. Trabecular bone micro-CT imaging and analysis of the proximal tibia were conducted. Inhalant LPS exposures lead to deterioration of bone quality only in male mice (not females) marked by decreased bone mineral density, bone volume/tissue volume ratio, trabecular thickness and number, and increased bone surface-to-bone volume ratio. Serum pentraxin-2 levels were modulated by sex differences and LPS exposure. In proof-of-concept studies, ovarectomized female mice demonstrated LPS-induced bone deterioration, and estradiol supplementation of ovarectomized female mice and control male mice protected against LPS-induced bone deterioration findings. Collectively, sex-specific differences exist in LPS-induced airway inflammatory consequences with significant differences found in bone quantity and quality parameters. Male mice demonstrated susceptibility to bone loss and female animals were protected, which was modulated by estrogen. Therefore, sex differences influence the biologic response in the lung-bone inflammatory axis in response to inhalant LPS exposures.
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Affiliation(s)
- Amy J Nelson
- a Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE , USA
| | - Shyamal K Roy
- b Obstetrics and Gynecology Department , University of Nebraska Medical Center , Omaha , NE , USA
| | - Kristi Warren
- a Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE , USA
| | - Katherine Janike
- a Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE , USA.,c Rheumatology Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE , USA
| | - Geoffrey M Thiele
- c Rheumatology Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE , USA.,d Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha , NE , USA
| | - Ted R Mikuls
- c Rheumatology Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE , USA.,d Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha , NE , USA
| | - Debra J Romberger
- a Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE , USA.,d Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha , NE , USA
| | - Dong Wang
- e Department of Pharmaceutical Sciences , University of Nebraska Medical Center , Omaha , NE , USA
| | - Benjamin Swanson
- f Department of Pathology and Microbiology , University of Nebraska Medical Center , Omaha , NE , USA
| | - Jill A Poole
- a Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE , USA
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Nordgren TM, Heires AJ, Zempleni J, Swanson BJ, Wichman C, Romberger DJ. Bovine milk-derived extracellular vesicles enhance inflammation and promote M1 polarization following agricultural dust exposure in mice. J Nutr Biochem 2018; 64:110-120. [PMID: 30476878 DOI: 10.1016/j.jnutbio.2018.10.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 10/05/2018] [Accepted: 10/29/2018] [Indexed: 12/21/2022]
Abstract
Occupational agricultural dust exposure can cause severe lung injury, including COPD and asthma exacerbations. Cell-derived extracellular vesicles can mediate inflammatory responses and immune activation, but the contribution of diet-derived extracellular vesicles to these processes is poorly understood. We investigated whether bovine milk-derived extracellular vesicles modulate inflammatory responses to agricultural dust exposures in a murine model. C57BL/6 mice were fed either an extracellular vesicle-enriched modification of the AIN-93G diet with lyophilized bovine milk (EV) or a control diet wherein the milk was presonicated, disrupting the milk extracellular vesicles and thereby leading to RNA degradation (DEV). Mice were maintained on the diets for 5-7 weeks and challenged with a single (acute) intranasal instillation of a 12.5% organic dust extract (DE) or with 15 instillations over 3 weeks (repetitive exposure model). Through these investigations, we identified significant interactions between diet and DE when considering numerous inflammatory outcomes, including lavage inflammatory cytokine levels and cellular infiltration into the lung airways. DE-treated peritoneal macrophages also demonstrated altered polarization, with EV-fed mouse macrophages exhibiting an M1 shift compared to an M2 phenotype in DEV-fed mice (IL-6, TNF, IL-12/23 all significantly elevated, and IL-10 and arginase decreased in EV macrophages, ex vivo). In complementary in vitro studies, mouse macrophages treated with purified milk-derived EV were found to express similar polarization phenotypes upon DE stimulation. These results suggest a role for dietary extracellular vesicles in the modulation of lung inflammation in response to organic dust which may involve macrophage phenotype polarization.
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Affiliation(s)
- Tara M Nordgren
- Pulmonary, Critical Care, Sleep and Allergy Division, University of Nebraska Medical Center, Omaha, NE, 68198; Division of Biomedical Sciences, School of Medicine, University of California Riverside, Riverside, CA, 92521.
| | - Art J Heires
- Pulmonary, Critical Care, Sleep and Allergy Division, University of Nebraska Medical Center, Omaha, NE, 68198.
| | - Janos Zempleni
- Nebraska Center for the Prevention of Obesity Diseases, Department of Nutrition and Health Sciences, University of Nebraska-Lincoln, Lincoln, NE, 68588.
| | - Benjamin J Swanson
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, 68198.
| | - Christopher Wichman
- Department of Biostatistics, College of Public Health, University of Nebraska Medical Center, Omaha, NE, 68198.
| | - Debra J Romberger
- Pulmonary, Critical Care, Sleep and Allergy Division, University of Nebraska Medical Center, Omaha, NE, 68198; VA Nebraska-Western Iowa Health Care System, Omaha, NE, 68105.
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Nath Neerukonda S, Mahadev-Bhat S, Aylward B, Johnson C, Charavaryamath C, Arsenault RJ. Kinome analyses of inflammatory responses to swine barn dust extract in human bronchial epithelial and monocyte cell lines. Innate Immun 2018; 24:366-381. [PMID: 30092684 PMCID: PMC6830909 DOI: 10.1177/1753425918792070] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Exacerbated inflammation upon persistent barn organic dust exposure is a key
contributor to the pathogenesis of lung inflammation and lung function decline.
Barn dust constituents and the mechanisms contributing to the exacerbated
inflammation are not clearly known. We set out to understand the inflammatory
effects of Swine Barn Dust Extracts (SBDE) on human lung epithelial (BEAS2B) and
macrophage (THP-1 monocyte derived) cell lines on a kinome array to determine
phosphorylation events in the inflammatory signaling pathways. Upon identifying
events unique to SBDE or those induced by innate immune ligands in each cell
line, we validated the signaling pathway activation by transcriptional analyses
of downstream inflammatory cytokines. Our findings indicate that SBDE-mediated
pro-inflammatory effects are predominantly due to the induction of neutrophilic
chemokine IL-8. Differentially phosphorylated peptides implicated in IL-8
induction in BEAS2B cell line include, TLR2, 4, 5, 7, 8, 9, PKC, MAP kinases
(p38, JNK), inflammasomes (NLRP1, NLRP3), NF-κB and AP-1. In the THP-1 cell
line, in addition to the aforementioned peptides, peptides corresponding to
RIG-I-like receptors (RIG-I, MDA5) were found. This is the first report to
demonstrate the application of a kinome array to delineate key inflammatory
signaling pathways activated upon SBDE exposure in vitro.
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Affiliation(s)
| | - Sanjana Mahadev-Bhat
- 2 Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, USA
| | - Bridget Aylward
- 1 Department of Animal and Food Sciences, University of Delaware, USA
| | - Casey Johnson
- 1 Department of Animal and Food Sciences, University of Delaware, USA
| | | | - Ryan J Arsenault
- 1 Department of Animal and Food Sciences, University of Delaware, USA
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Abstract
PURPOSE OF REVIEW Agriculture remains a major economic sector globally, and workers experience high rates of chronic inflammatory lung and musculoskeletal diseases. Whereas obstructive pulmonary diseases are known risk factors for bone loss, the underlying relationship between lung inflammation and bone health is not well known. RECENT FINDINGS An agriculture organic dust extract inhalation animal model has recently linked lung injury-induced inflammation to systemic bone loss. This process is dependent upon lipopolysaccharide and the toll-like receptor 4 (TLR4) signaling pathway. Downstream systemic interleukin-6 is a key mediator that subsequently activates osteoclastogenesis. Age is a host factor that impacted bone disease with younger mice demonstrating increased susceptibility to bone loss following inhalant exposures as compared to older mice. Supplemental dietary vitamin D was shown to prevent organic dust-induced bone loss, but not lung disease, in animals. Recent animal studies provide new mechanistic insight into the lung-bone inflammatory axis. Host factors, diet, and lipopolysaccharide/TLR4 signaling pathways play a significant role in explaining how inhalant organic dust exposures impact bone health. These investigations might lead to specific targeted therapeutic approaches.
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Poole JA, Mikuls TR, Duryee MJ, Warren KJ, Wyatt TA, Nelson AJ, Romberger DJ, West WW, Thiele GM. A role for B cells in organic dust induced lung inflammation. Respir Res 2017; 18:214. [PMID: 29273051 PMCID: PMC5741951 DOI: 10.1186/s12931-017-0703-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 12/13/2017] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Agriculture organic dust exposures induce lung disease with lymphoid aggregates comprised of both T and B cells. The precise role of B cells in mediating lung inflammation is unknown, yet might be relevant given the emerging role of B cells in obstructive pulmonary disease and associated autoimmunity. METHODS Using an established animal model, C57BL/6 wild-type (WT) and B-cell receptor (BCR) knock-out (KO) mice were repetitively treated with intranasal inhalation of swine confinement organic dust extract (ODE) daily for 3 weeks and lavage fluid, lung tissues, and serum were collected. RESULTS ODE-induced neutrophil influx in lavage fluid was not reduced in BCR KO animals, but there was reduction in TNF-α, IL-6, CXCL1, and CXCL2 release. ODE-induced lymphoid aggregates failed to develop in BCR KO mice. There was a decrease in ODE-induced lung tissue CD11c+CD11b+ exudative macrophages and compensatory increase in CD8+ T cells in lavage fluid of BCR KO animals. Compared to saline, there was an expansion of conventional B2-, innate B1 (CD19+CD11b+CD5+/-)-, and memory (CD19+CD273+/-CD73+/-) B cells following ODE exposure in WT mice. Autoreactive responses including serum IgG anti-citrullinated protein antibody (ACPA) and anti-malondialdehyde-acetaldehyde (MAA) autoantibodies were increased in ODE treated WT mice as compared to saline control. B cells and serum immunoglobulins were not detected in BCR KO animals. CONCLUSIONS Lung tissue staining for citrullinated and MAA modified proteins were increased in ODE-treated WT animals, but not BCR KO mice. These studies show that agriculture organic dust induced lung inflammation is dependent upon B cells, and dust exposure induces an autoreactive response.
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Affiliation(s)
- Jill A Poole
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center (UNMC), 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA.
| | - Ted R Mikuls
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA.,Rheumatology Division, Department of Internal Medicine, UNMC, Omaha, NE, USA
| | - Michael J Duryee
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA.,Rheumatology Division, Department of Internal Medicine, UNMC, Omaha, NE, USA
| | - Kristi J Warren
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center (UNMC), 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA
| | - Todd A Wyatt
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center (UNMC), 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA.,Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA.,Department of Environmental, Agricultural, and Occupational Health, UNMC, Omaha, NE, USA
| | - Amy J Nelson
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center (UNMC), 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA
| | - Debra J Romberger
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center (UNMC), 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA.,Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA
| | - William W West
- Pathology and Microbiology Department, UNMC, Omaha, NE, USA
| | - Geoffrey M Thiele
- Veterans Affairs Nebraska-Western Iowa Health Care System, Research Service, Omaha, NE, USA.,Rheumatology Division, Department of Internal Medicine, UNMC, Omaha, NE, USA
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Gregory JA, Kemi C, Ji J, Karén J, Delin I, Gerde P, Pieper MP, Adner M, Larsson K. Effects of tiotropium bromide on airway hyperresponsiveness and inflammation in mice exposed to organic dust. Pulm Pharmacol Ther 2017; 48:203-210. [PMID: 29247703 DOI: 10.1016/j.pupt.2017.12.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 12/07/2017] [Accepted: 12/12/2017] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Acute exposure to organic dust (OD) in pig barns induces intense airway inflammation with neutrophilia and hyperresponsiveness. This reaction is likely associated with increased cholinergic activity. Therefore, the involvement of cholinergic mechanisms in the reaction to acute exposure of OD was investigated in mice using the long-acting muscarinic antagonist tiotropium. METHODS BALB/c mice received tiotropium (2-200 ng) intranasally on day 1 of the study. On days 2-4, mice received vehicle or OD (25 μg) intranasally. Airway hyperresponsiveness to methacholine was assessed 24 h following the last OD exposure. Bronchoalveolar lavage (BAL) fluid, lung tissue and blood were collected for analyses. RESULTS Organic dust elevated airway responsiveness to methacholine compared with controls (PBS) assessed as Newtonian resistance (1.5 ± 0.1 vs 0.9 ± 0.1 cm H2O x s/mL), tissue damping (12.4 ± 1.4 vs 8.9 ± 0.9 cm H2O∙s/mL) and tissue elastance (41.1 ± 5.3 vs 27.2 ± 2.5 cm H2O∙s/mL). Tiotropium (200 ng) decreased the Newtonian resistance and tissue damping after exposure to PBS or OD. Organic dust exposure increased inflammatory cells in BAL fluid by almost 400%, mainly due to neutrophil influx, which was unaffected by tiotropium. Organic dust increased levels of mainly Th1 mediators. Tiotropium treatment attenuated OD-induced release of IL-2, IL-4 and IL-6. CONCLUSIONS Tiotropium decreased the OD-induced increase of specific cytokines without influencing the OD-induced increase of airway responsiveness and neutrophil infiltration into the lungs. We conclude that the cholinergic pathway contributes to the pro-inflammatory effects caused by inhalation of OD from pig barns.
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Affiliation(s)
- Joshua A Gregory
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; Center for Allergy Research, Karolinska Institutet, Stockholm, Sweden
| | - Cecilia Kemi
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; Center for Allergy Research, Karolinska Institutet, Stockholm, Sweden
| | - Jie Ji
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Jakob Karén
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Ingrid Delin
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Per Gerde
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Michael P Pieper
- Immunology & Respiratory Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, Germany
| | - Mikael Adner
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; Center for Allergy Research, Karolinska Institutet, Stockholm, Sweden.
| | - Kjell Larsson
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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Nordgren TM, Heires AJ, Bailey KL, Katafiasz DM, Toews ML, Wichman CS, Romberger DJ. Docosahexaenoic acid enhances amphiregulin-mediated bronchial epithelial cell repair processes following organic dust exposure. Am J Physiol Lung Cell Mol Physiol 2017; 314:L421-L431. [PMID: 29097425 DOI: 10.1152/ajplung.00273.2017] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Injurious dust exposures in the agricultural workplace involve the release of inflammatory mediators and activation of epidermal growth factor receptor (EGFR) in the respiratory epithelium. Amphiregulin (AREG), an EGFR ligand, mediates tissue repair and wound healing in the lung epithelium. Omega-3 fatty acids such as docosahexaenoic acid (DHA) are also known modulators of repair and resolution of inflammatory injury. This study investigated how AREG, DHA, and EGFR modulate lung repair processes following dust-induced injury. Primary human bronchial epithelial (BEC) and BEAS-2B cells were treated with an aqueous extract of swine confinement facility dust (DE) in the presence of DHA and AREG or EGFR inhibitors. Mice were exposed to DE intranasally with or without EGFR inhibition and DHA. Using a decellularized lung scaffolding tissue repair model, BEC recolonization of human lung scaffolds was analyzed in the context of DE, DHA, and AREG treatments. Through these investigations, we identified an important role for AREG in mediating BEC repair processes. DE-induced AREG release from BEC, and DHA treatment following DE exposure, enhanced this release. Both DHA and AREG also enhanced BEC repair capacities and rescued DE-induced recellularization deficits. In vivo, DHA treatment enhanced AREG production following DE exposure, whereas EGFR inhibitor-treated mice exhibited reduced AREG in their lung homogenates. These data indicate a role for AREG in the process of tissue repair after inflammatory lung injury caused by environmental dust exposure and implicate a role for DHA in regulating AREG-mediated repair signaling in BEC.
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Affiliation(s)
- Tara M Nordgren
- Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska.,Division of Biomedical Sciences, School of Medicine, University of California Riverside , Riverside, California
| | - Art J Heires
- Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska
| | - Kristina L Bailey
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, Nebraska.,Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska
| | - Dawn M Katafiasz
- Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska
| | - Myron L Toews
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center , Omaha, Nebraska
| | - Christopher S Wichman
- Department of Biostatistics, University of Nebraska Medical Center , Omaha, Nebraska
| | - Debra J Romberger
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, Nebraska.,Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center , Omaha, Nebraska
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Schneberger D, DeVasure JM, Bailey KL, Romberger DJ, Wyatt TA. Effect of low-level CO 2 on innate inflammatory protein response to organic dust from swine confinement barns. J Occup Med Toxicol 2017; 12:9. [PMID: 28352288 PMCID: PMC5366145 DOI: 10.1186/s12995-017-0155-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 03/16/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Organic hog barn dust (HDE) exposure induces lung inflammation and long-term decreases in lung function in agricultural workers. While concentrations of common gasses in confined animal facilities are well characterized, few studies have been done addressing if exposure to elevated barn gasses impacts the lung immune response to organic dusts. Given the well documented effects of hypercapnia at much higher levels we hypothesized that CO2 at 8 h exposure limit levels (5000 ppm) could alter innate immune responses to HDE. METHODS Using a mouse model, C57BL/6 mice were nasally instilled with defined barn dust extracts and then housed in an exposure box maintained at one of several CO2 levels for six hours. Bronchiolar lavage (BAL) was tested for several cytokines while lung tissue was saved for mRNA purification and immunohistochemistry. RESULTS Exposure to elevated CO2 significantly increased the expression of pro-inflammatory markers, IL-6 and KC, in BAL fluid as compared to dust exposure alone. Expression of other pro-inflammatory markers, such as ICAM-1 and matrix metalloproteinase-9 (MMP-9), were also tested and showed similar increased expression upon HDE + CO2 exposure. A chemokine array analysis of BAL fluid revealed that MIP-1γ (CCL9) shows a similar increased response to HDE + CO2. Further testing showed CCL9 was significantly elevated by barn dust and further enhanced by CO2 co-exposure in a dose-dependent manner that was noticeable at the protein and mRNA levels. In all cases, except for ICAM-1, increases in tested markers in the presence of elevated CO2 were only significant in the presence of HDE as well. CONCLUSIONS We show that even at mandated safe exposure limits, CO2 is capable of enhancing multiple markers of inflammation in response to HDE.
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Affiliation(s)
- David Schneberger
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985910 The Nebraska Medical Center, Omaha, NE 68198-5910 USA
| | - Jane M. DeVasure
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985910 The Nebraska Medical Center, Omaha, NE 68198-5910 USA
| | - Kristina L. Bailey
- Research Service, Veterans Administration Nebraska Western Iowa Health Care System, Omaha, NE 68105 USA
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985910 The Nebraska Medical Center, Omaha, NE 68198-5910 USA
| | - Debra J. Romberger
- Research Service, Veterans Administration Nebraska Western Iowa Health Care System, Omaha, NE 68105 USA
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985910 The Nebraska Medical Center, Omaha, NE 68198-5910 USA
| | - Todd A. Wyatt
- Research Service, Veterans Administration Nebraska Western Iowa Health Care System, Omaha, NE 68105 USA
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985910 The Nebraska Medical Center, Omaha, NE 68198-5910 USA
- Department of Environmental, Agricultural and Occupational Health, University of Nebraska Medical Center, 985910 The Nebraska Medical Center, Omaha, NE 68198-5910 USA
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Wyatt TA, Canady K, Heires AJ, Poole JA, Bailey KL, Nordgren TM, Romberger DJ. Alcohol Inhibits Organic Dust-induced ICAM-1 Expression on Bronchial Epithelial Cells. SAFETY 2017; 3:5. [PMID: 29082234 PMCID: PMC5658133 DOI: 10.3390/safety3010005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Aims: Exposure to dusts/bioaerosols in concentrated animal feeding operations (CAFOs) results in inflammatory lung diseases in workers. Hog CAFOs dust extract (HDE) increases expression of intercellular adhesion molecule-1 (ICAM-1), neutrophil adhesion, and TNFα release in bronchial epithelial cells. Alcohol consumption is increasingly recognized to impair lung immunity. We hypothesized that alcohol impairs HDE-induced TNFα, ICAM-1 expression and neutrophil adhesion by directly inhibiting TNFα converting enzyme (TACE) activity. METHODS Bronchial epithelial cells (BEAS-2B) and primary human bronchial epithelial cells were pretreated with ethanol (EtOH) or TACE inhibitor. ICAM-1 surface expression, TNFα release, and TACE activity were analyzed following HDE stimulation. The effect of alcohol and TACE inhibition on HDE-regulated epithelial cell/neutrophil adhesion interactions was investigated. Finally, utilizing an established animal model, C57BL/6 mice were fed ad libitum ethanol (20%) in drinking water for 8 wk followed by daily intranasal inhalation of HDE or saline during the final two weeks. Mice were sacrificed and lung sections immunostained for ICAM-1. RESULTS Pretreatment with alcohol or TACE inhibitor significantly decreased HDE-induced ICAM-1 expression and TNFα release. HDE augmented neutrophil adhesion to epithelial cells, which was decreased with alcohol (32% decrease) or TACE inhibitor (55% decrease) pretreatment. TACE activity increased following HDE exposure, but TACE activity was inhibited following alcohol pretreatment. Alcohol-fed mice demonstrated decreased HDE-induced airway epithelium ICAM-1 expression. CONCLUSIONS Alcohol diminishes HDE-induced ICAM-1 expression, TNFα release, and neutrophil adhesion via inhibition of TACE activity. These results suggest that alcohol may be an important modulator of lung innate immune responses following CAFO exposure.
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Affiliation(s)
- Todd A. Wyatt
- Pulmonary, Critical Care, Sleep & Allergy Division of the Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, 68198; USA
- Department of Environmental, Agricultural, & Occupational Health, University of Nebraska Medical Center, Omaha, NE, 68198-5910
- Resereach Service, VA Omaha-Western Iowa Health Care System, Omaha, NE, 68105
| | - Kerry Canady
- Pulmonary, Critical Care, Sleep & Allergy Division of the Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, 68198; USA
| | - Art J. Heires
- Pulmonary, Critical Care, Sleep & Allergy Division of the Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, 68198; USA
| | - Jill A. Poole
- Pulmonary, Critical Care, Sleep & Allergy Division of the Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, 68198; USA
| | - Kristina L. Bailey
- Pulmonary, Critical Care, Sleep & Allergy Division of the Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, 68198; USA
- Resereach Service, VA Omaha-Western Iowa Health Care System, Omaha, NE, 68105
| | - Tara M. Nordgren
- Pulmonary, Critical Care, Sleep & Allergy Division of the Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, 68198; USA
| | - Debra J. Romberger
- Pulmonary, Critical Care, Sleep & Allergy Division of the Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, 68198; USA
- Resereach Service, VA Omaha-Western Iowa Health Care System, Omaha, NE, 68105
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Post-injury and resolution response to repetitive inhalation exposure to agricultural organic dust in mice. SAFETY 2017; 3. [PMID: 29387711 PMCID: PMC5788309 DOI: 10.3390/safety3010010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Inhalation of organic dusts in agricultural environments causes airway inflammatory diseases. Despite advances in understanding the airway response to dust-induced inflammation, less is known about the transition from lung injury to repair and recovery. The objective of this study was to define the post-inflammation homeostasis events following organic dust-induced lung injury. Using an established protocol, mice were intranasally treated with swine confinement facility organic dust extract (ODE) daily for 3 weeks (repetitive exposure) or treated daily with ODE for 3 weeks followed by no treatment for 1–4 weeks (recovery period) whereupon lavage fluid, lung tissue, and sera were processed. During recovery period, a significant decrease was observed in ODE-induced neutrophil levels after 1 week, lymphocytes at 2 weeks, and macrophages at 4 weeks in the lavage fluid. ODE-induced lung cellular aggregates and bronchiolar compartment inflammation were diminished, but persisted for 4 weeks post-injury. Alveolar inflammation resolved at 3 weeks. ODE-induced lung neutrophils were cleared by 3 weeks, B-cells by 2 weeks, and CD3+CD4+ and CD3+CD8+ T cells by 4 week recovery period. Collectively, these results identify important processes during recovery period following agricultural dust-induced inflammation, and present possible strategies for improving lung repair and resolution.
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Wells A, Romberger DJ, Thiele GM, Wyatt TA, Staab E, Heires AJ, Klassen LW, Duryee MJ, Mikuls TR, Dusad A, West WW, Wang D, Poole JA. Systemic IL-6 Effector Response in Mediating Systemic Bone Loss Following Inhalation of Organic Dust. J Interferon Cytokine Res 2016; 37:9-19. [PMID: 27875664 DOI: 10.1089/jir.2016.0048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Airway and skeletal diseases are prominent among agriculture workers. Repetitive inhalant exposures to agriculture organic dust extract (ODE) induces bone deterioration in mice; yet the mechanisms responsible for connecting the lung-bone inflammatory axis remain unclear. We hypothesized that the interleukin (IL)-6 effector response regulates bone deterioration following inhalant ODE exposures. Using an established intranasal inhalation exposure model, wild-type (WT) and IL-6 knockout (KO) mice were treated daily with ODE or saline for 3 weeks. ODE-induced airway neutrophil influx, cytokine/chemokine release, and lung pathology were not reduced in IL-6 KO animals compared to WT mice. Utilizing micro-computed tomography, analysis of tibia showed that loss of bone mineral density, volume, and deterioration of bone micro-architecture, and mechanical strength induced by inhalant ODE exposures in WT mice were absent in IL-6 KO animals. Compared to saline treatments, bone-resorbing osteoclasts and bone marrow osteoclast precursor populations were also increased in ODE-treated WT but not IL-6 KO mice. These results show that the systemic IL-6 effector pathway mediates bone deterioration induced by repetitive inhalant ODE exposures through an effect on osteoclasts, but a positive role for IL-6 in the airway was not demonstrated. IL-6 might be an important link in explaining the lung-bone inflammatory axis.
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Affiliation(s)
- Adam Wells
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Debra J Romberger
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska.,2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska
| | - Geoffrey M Thiele
- 2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska.,3 Rheumatology Division, Department of Medicine, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Todd A Wyatt
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska.,2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska.,4 Department of Environmental, Agricultural, and Occupational Health, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Elizabeth Staab
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Art J Heires
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska.,2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska
| | - Lynell W Klassen
- 2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska.,3 Rheumatology Division, Department of Medicine, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Michael J Duryee
- 2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska.,3 Rheumatology Division, Department of Medicine, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Ted R Mikuls
- 2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska.,3 Rheumatology Division, Department of Medicine, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Anand Dusad
- 3 Rheumatology Division, Department of Medicine, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - William W West
- 5 Department of Pathology and Microbiology, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Dong Wang
- 6 Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Jill A Poole
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
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50
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Gerald CL, Romberger DJ, DeVasure JM, Khazanchi R, Nordgren TM, Heires AJ, Sisson JH, Wyatt TA. Alcohol Decreases Organic Dust-Stimulated Airway Epithelial TNF-Alpha Through a Nitric Oxide and Protein Kinase-Mediated Inhibition of TACE. Alcohol Clin Exp Res 2016; 40:273-83. [PMID: 26842246 DOI: 10.1111/acer.12967] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 11/18/2015] [Indexed: 12/24/2022]
Abstract
BACKGROUND Farm workers in rural areas consume more alcohol than those who reside in urban areas. Occupational exposures such as agricultural work can pose hazards on the respiratory system. It is established that hog barn dust induces inflammation in the airway, including the release of cytokines such as tumor necrosis factor alpha (TNF-α), interleukin-6 (IL-6), and IL-8. We have shown that alcohol alters airway epithelial innate defense through changes in both nitric oxide (NO) and cAMP-dependent protein kinase A (PKA). Simultaneous exposure to hog barn dust and alcohol decreases inflammatory mediators, TNF-α, IL-6, and IL-8, in mice. Previously, mice exposed to both alcohol and hog barn dust showed a depleted amount of lymphocytes compared to mice exposed only to hog barn dust. Weakening of the innate immune response could lead to enhanced susceptibility to disease. In addition, mice that were co-exposed to hog barn dust and alcohol also experienced increased mortality. METHODS Because we recently demonstrated that PKA activation inhibits the TNF-α sheddase, TNF-α-converting enzyme (TACE), we hypothesized that an alcohol-mediated PKA pathway blocks TACE activity and prevents the normative inflammatory response to hog barn dust exposure. To delineate these effects, we used PKA pathway inhibitors (adenylyl cyclase [AC], cAMP, and PKA) to modulate the effects of alcohol on dust-stimulated TNF-α release in the bronchial epithelial cell line, BEAS-2B. Alcohol pretreatment blocked TACE activity and TNF-α release in hog barn dust-treated cells. RESULTS Alcohol continued to block hog barn dust-mediated TNF-α release in the presence of the particulate AC inhibitor, SQ22,536. The soluble adenylyl cyclase inhibitor, KH7, however, significantly increased the inflammatory response to hog barn dust. phosphodiesterase 4 inhibitors significantly elevated cAMP and enhanced alcohol-mediated inhibition of dust-stimulated TNF-α release. In addition, the NO synthase inhibitor, l-NMMA, also reversed the alcohol-blocking effect on dust-stimulated TNF-α. CONCLUSIONS These data suggest that alcohol requires a soluble cyclase-generated cAMP-PKA pathway that is dependent upon the action of NO to inhibit TACE and TNF-α release. These findings support our observations that alcohol functions through a dual NO and PKA pathway in bronchial epithelial cells.
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Affiliation(s)
- Carresse L Gerald
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, Nebraska Medical Center, Omaha, Nebraska
| | - Debra J Romberger
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, Nebraska Medical Center, Omaha, Nebraska.,Department of Veterans Affairs Medical Center, VA Nebraska-Western Iowa Health Care System Research Service, Omaha, Nebraska
| | - Jane M DeVasure
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, Nebraska Medical Center, Omaha, Nebraska
| | - Rohan Khazanchi
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, Nebraska Medical Center, Omaha, Nebraska
| | - Tara M Nordgren
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, Nebraska Medical Center, Omaha, Nebraska
| | - Art J Heires
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, Nebraska Medical Center, Omaha, Nebraska
| | - Joseph H Sisson
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, Nebraska Medical Center, Omaha, Nebraska
| | - Todd A Wyatt
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, Nebraska Medical Center, Omaha, Nebraska.,Department of Veterans Affairs Medical Center, VA Nebraska-Western Iowa Health Care System Research Service, Omaha, Nebraska.,Department of Environmental, Agricultural, and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska
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