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Robertoni FSZ, Velosa APP, Oliveira LDM, de Almeida FM, da Silveira LKR, Queiroz ZADJ, Lobo TDM, Contini VE, Baldavira CM, Carrasco S, Fernezlian SDM, Sato MN, Capelozzi VL, Lopes FDTQDS, Teodoro WPR. Type V collagen-induced nasal tolerance prevents lung damage in an experimental model: new evidence of autoimmunity to collagen V in COPD. Front Immunol 2024; 15:1444622. [PMID: 39301030 PMCID: PMC11410637 DOI: 10.3389/fimmu.2024.1444622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Accepted: 08/16/2024] [Indexed: 09/22/2024] Open
Abstract
Background Chronic obstructive pulmonary disease (COPD) has been linked to immune responses to lung-associated self-antigens. Exposure to cigarette smoke (CS), the main cause of COPD, causes chronic lung inflammation, resulting in pulmonary matrix (ECM) damage. This tissue breakdown exposes collagen V (Col V), an antigen typically hidden from the immune system, which could trigger an autoimmune response. Col V autoimmunity has been linked to several lung diseases, and the induction of immune tolerance can mitigate some of these diseases. Evidence suggests that autoimmunity to Col V might also occur in COPD; thus, immunotolerance to Col V could be a novel therapeutic approach. Objective The role of autoimmunity against collagen V in COPD development was investigated by analyzing the effects of Col V-induced tolerance on the inflammatory response and lung remodeling in a murine model of CS-induced COPD. Methods Male C57BL/6 mice were divided into three groups: one exposed to CS for four weeks, one previously tolerated for Col V and exposed to CS for four weeks, and one kept in clean air for the same period. Then, we proceeded with lung functional and structural evaluation, assessing inflammatory cells in bronchoalveolar lavage fluid (BALF) and inflammatory markers in the lung parenchyma, inflammatory cytokines in lung and spleen homogenates, and T-cell phenotyping in the spleen. Results CS exposure altered the structure of elastic and collagen fibers and increased the pro-inflammatory immune response, indicating the presence of COPD. Col V tolerance inhibited the onset of emphysema and prevented structural changes in lung ECM fibers by promoting an immunosuppressive microenvironment in the lung and inducing Treg cell differentiation. Conclusion Induction of nasal tolerance to Col V can prevent inflammatory responses and lung remodeling in experimental COPD, suggesting that autoimmunity to Col V plays a role in COPD development.
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Affiliation(s)
| | | | - Luana de Mendonça Oliveira
- Laboratory of Dermatology and Immunodeficiencies, Laboratório de Investigação Médica (LIM)-56, Department of Dermatology, Tropical Medicine Institute of São Paulo, University of São Paulo Medical School, São Paulo, Brazil
| | - Francine Maria de Almeida
- Department of Clinical Medicine, Laboratory of Experimental Therapeutics, Laboratório de Investigação Médica (LIM)-20, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | | | | | - Thays de Matos Lobo
- Division of Rheumatology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Vitória Elias Contini
- Division of Rheumatology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | | | - Solange Carrasco
- Division of Rheumatology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | | | - Maria Notomi Sato
- Laboratory of Dermatology and Immunodeficiencies, Laboratório de Investigação Médica (LIM)-56, Department of Dermatology, Tropical Medicine Institute of São Paulo, University of São Paulo Medical School, São Paulo, Brazil
| | - Vera Luiza Capelozzi
- Department of Pathology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
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Sakhatskyy P, Wang Z, Borgas D, Lomas-Neira J, Chen Y, Ayala A, Rounds S, Lu Q. Double-hit mouse model of cigarette smoke priming for acute lung injury. Am J Physiol Lung Cell Mol Physiol 2016; 312:L56-L67. [PMID: 27864287 PMCID: PMC5283923 DOI: 10.1152/ajplung.00436.2016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 11/16/2016] [Indexed: 01/07/2023] Open
Abstract
Epidemiological studies indicate that cigarette smoking (CS) increases the risk and severity of acute lung injury (ALI)/acute respiratory distress syndrome (ARDS). The mechanism is not understood, at least in part because of lack of animal models that reproduce the key features of the CS priming process. In this study, using two strains of mice, we characterized a double-hit mouse model of ALI induced by CS priming of injury caused by lipopolysaccharide (LPS). C57BL/6 and AKR mice were preexposed to CS briefly (3 h) or subacutely (3 wk) before intratracheal instillation of LPS and ALI was assessed 18 h after LPS administration by measuring lung static compliance, lung edema, vascular permeability, inflammation, and alveolar apoptosis. We found that as little as 3 h of exposure to CS enhanced LPS-induced ALI in both strains of mice. Similar exacerbating effects were observed after 3 wk of preexposure to CS. However, there was a strain difference in susceptibility to CS priming for ALI, with a greater effect in AKR mice. The key features we observed suggest that 3 wk of CS preexposure of AKR mice is a reproducible, clinically relevant animal model that is useful for studying mechanisms and treatment of CS priming for a second-hit-induced ALI. Our data also support the concept that increased susceptibility to ALI/ARDS is an important adverse health consequence of CS exposure that needs to be taken into consideration when treating critically ill individuals.
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Affiliation(s)
- Pavlo Sakhatskyy
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center/Alpert Medical School of Brown University, Providence, Rhode Island; and
| | - Zhengke Wang
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center/Alpert Medical School of Brown University, Providence, Rhode Island; and
| | - Diana Borgas
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center/Alpert Medical School of Brown University, Providence, Rhode Island; and
| | - Joanne Lomas-Neira
- Division of Surgical Research, Rhode Island Hospital/Alpert Medical School of Brown University, Providence, Rhode Island
| | - Yaping Chen
- Division of Surgical Research, Rhode Island Hospital/Alpert Medical School of Brown University, Providence, Rhode Island
| | - Alfred Ayala
- Division of Surgical Research, Rhode Island Hospital/Alpert Medical School of Brown University, Providence, Rhode Island
| | - Sharon Rounds
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center/Alpert Medical School of Brown University, Providence, Rhode Island; and
| | - Qing Lu
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center/Alpert Medical School of Brown University, Providence, Rhode Island; and
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Cui Y, Li H, Wu S, Zhao R, Du D, Ding Y, Nie H, Ji HL. Formaldehyde impairs transepithelial sodium transport. Sci Rep 2016; 6:35857. [PMID: 27762337 PMCID: PMC5071906 DOI: 10.1038/srep35857] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 10/06/2016] [Indexed: 01/26/2023] Open
Abstract
Unsaturated oxidative formaldehyde is a noxious aldehyde in cigarette smoke that causes edematous acute lung injury. However, the mechanistic effects of formaldehyde on lung fluid transport are still poorly understood. We examined how formaldehyde regulates human epithelial sodium channels (ENaC) in H441 and expressed in Xenopus oocytes and exposed mice in vivo. Our results showed that formaldehyde reduced mouse transalveolar fluid clearance in vivo. Formaldehyde caused a dose-dependent inhibition of amiloride-sensitive short-circuit Na+ currents in H441 monolayers and of αβγ-ENaC channel activity in oocytes. α-ENaC protein was reduced, whereas phosphorylation of the extracellular regulated protein kinases 1 and 2 (ERK1/2) increased significantly post exposure. Moreover, both α- and γ-ENaC transcripts were down-regulated. Reactive oxygen species (ROS) was elevated significantly by formaldehyde in addition to markedly augmented membrane permeability of oocytes. These data suggest that formaldehyde contributes to edematous acute lung injury by reducing transalveolar Na+ transport, through decreased ENaC activity and enhanced membrane depolarization, and by elevating ROS production over long-term exposure.
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Affiliation(s)
- Yong Cui
- Department of Anesthesiology, First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Huiming Li
- Institute of Metabolic Disease Research and Drug Development, China Medical University, Shenyang, Liaoning, China
| | - Sihui Wu
- Institute of Metabolic Disease Research and Drug Development, China Medical University, Shenyang, Liaoning, China
| | - Runzhen Zhao
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, Tyler, Texas, USA
| | - Deyi Du
- Institute of Metabolic Disease Research and Drug Development, China Medical University, Shenyang, Liaoning, China
| | - Yan Ding
- Institute of Metabolic Disease Research and Drug Development, China Medical University, Shenyang, Liaoning, China
| | - Hongguang Nie
- Institute of Metabolic Disease Research and Drug Development, China Medical University, Shenyang, Liaoning, China
| | - Hong-Long Ji
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, Tyler, Texas, USA
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Lu Q, Sakhatskyy P, Grinnell K, Newton J, Ortiz M, Wang Y, Sanchez-Esteban J, Harrington EO, Rounds S. Cigarette smoke causes lung vascular barrier dysfunction via oxidative stress-mediated inhibition of RhoA and focal adhesion kinase. Am J Physiol Lung Cell Mol Physiol 2011; 301:L847-57. [PMID: 21984567 PMCID: PMC3233834 DOI: 10.1152/ajplung.00178.2011] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Accepted: 10/04/2011] [Indexed: 01/23/2023] Open
Abstract
Cigarette smoke (CS) is a major cause of chronic lung and cardiovascular diseases. Recent studies indicate that tobacco use is also a risk factor for acute lung injury (ALI) associated with blunt trauma. Increased endothelial cell (EC) permeability is a hallmark of ALI. CS increases EC permeability in vitro and in vivo; however, the underlying mechanism is not well understood. In this study, we found that only 6 h of exposure to CS impaired endothelial barrier function in vivo, an effect associated with increased oxidative stress in the lungs and attenuated by the antioxidant N-acetylcysteine (NAC). CS also exacerbated lipopolysaccharide (LPS)-induced increase in vascular permeability in vivo. Similar additive effects were also seen in cultured lung EC exposed to cigarette smoke extract (CSE) and LPS. We further demonstrated that CSE caused disruption of focal adhesion complexes (FAC), F-actin fibers, and adherens junctions (AJ) and decreased activities of RhoA and focal adhesion kinase (FAK) in cultured lung EC. CSE-induced inhibition of RhoA and FAK, endothelial barrier dysfunction, and disassembly of FAC, F-actin, and AJ were prevented by NAC. In addition, the deleterious effects of CSE on FAC, F-actin fibers, and AJ were blunted by overexpression of constitutively active RhoA and of FAK. Our data indicate that CS causes endothelial barrier dysfunction via oxidative stress-mediated inhibition of RhoA and FAK.
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Affiliation(s)
- Qing Lu
- Vascular Research Laboratory, Providence Veterans Affairs Medical Center, Department of Medicine, Alpert Medical School of Brown University, RI, USA.
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Gabr RQ, Elsherbiny ME, Somayaji V, Pollak PT, Brocks DR. A liquid chromatography-mass spectrometry method for nicotine and cotinine; utility in screening tobacco exposure in patients taking amiodarone. Biomed Chromatogr 2011; 25:1124-31. [PMID: 21308701 DOI: 10.1002/bmc.1581] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Revised: 10/27/2010] [Accepted: 10/29/2010] [Indexed: 02/03/2023]
Abstract
A liquid chromatographic mass spectrometric (LC-MS) assay for the quantification of nicotine and cotinine in human specimens was developed. Human serum and urine (100 μL) were subjected to liquid-liquid extraction. For glucuronidated cotinine, serum was alkalinized and hydrolyzed before extraction. The dried samples were reconstituted and run using gradient flow reverse-phase liquid chromatography with MS detection. The ions utilized for quantification of nicotine, cotinine and milrinone (internal standard) were 162.8, 176.9 and 211.9 m/z, respectively. The mean recoveries were over 80% for cotinine and nicotine with excellent linearity between nominal concentrations and peak area ratios, over a wide concentration range. The percentage coefficient of variation and mean error of the inter- and intra-day validations were <15% for nicotine and cotinine. Analysis of serum from cardiac patients receiving amiodarone suggested that a number of patients were either active smokers or exposed to second-hand smoke. Significant concentrations of nicotine and cotinine were measured in the urine of a known smoking volunteer. The method was highly specific, sensitive and applicable as a tool in detecting and monitoring the passive exposure to tobacco smoke using small specimen volumes (0.1 mL).
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Affiliation(s)
- Raniah Q Gabr
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Canada
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Xu A, Prophete C, Chen LC, Emala CW, Cohen MD. Interactive effect of cigarette smoke extract and world trade center dust particles on airway cell cytotoxicity. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2011; 74:887-902. [PMID: 21623534 DOI: 10.1080/15287394.2011.573719] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Rescue workers and residents exposed to the environment surrounding the collapse of the World Trade Center (WTC) on September 11, 2001, have suffered a disproportionate incidence of chronic lung disease attributed to the inhalation of airborne dust. To date, the pathophysiology of this lung disease is poorly understood. The aim of this study was to examine whether airborne dust contaminants recovered from the surrounding area 24-48 h after the collapse of the WTC demonstrate direct cytotoxicity to two airway cell types that were most directly exposed to inhaled dust, airway epithelial and smooth muscle cells. It was also of interest to determine whether the presence of these dusts could modulate the effects of cigarette smoke on these cell types in that some of the individuals who responded to the collapse site were also smokers. Human cultured airway epithelial (BEAS-2B) cells were exposed to 10% cigarette smoke extract (CSE), WTC dust particles (10-53 μm; 0.01-0.5 μg/μl), or a combination of the two for 2-24 h. Cell viability was measured by determining mitochondrial integrity (MTT assays) and apoptosis (poly-ADP-ribose polymerase [PARP] immunoblotting). Conditioned cell culture media recovered from the CSE- and/or WTC dust-exposed BEAS-2B cells were then applied to cultured human airway smooth muscle cells that were subsequently assayed for mitochondrial integrity and their ability to synthesize cyclic AMP (a regulator of airway smooth muscle constriction). BEAS-2B cells underwent necrotic cell death following exposure to WTC dust or CSE for 2-24 h without evidence of apoptosis. Smooth muscle cells demonstrated cellular toxicity and enhanced cyclic AMP synthesis following exposure to conditioned media from WTC- or CSE-exposed epithelial cells. These acute toxicity assays of WTC dust and CSE offer insights into lung cell toxicity that may contribute to the pathophysiology of chronic lung disease in workers and residents exposed to WTC dust. These studies clearly showed that WTC dust (at least the supercoarse particle fraction) or CSE alone exerted direct adverse effects on airway epithelial and smooth muscle cells, and altered the signaling properties of airway smooth muscle cells. In addition the combination of CSE and WTC exerted an interactive effect on cell toxicity. It remains to be determined whether these initial cell death events might account, in part, for the chronic lung effects associated with WTC dust exposure among First Responders and others.
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Affiliation(s)
- Alice Xu
- Columbia University, New York, New York, USA
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