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Marques-da-Silva D, Lagoa R. Rafting on the Evidence for Lipid Raft-like Domains as Hubs Triggering Environmental Toxicants' Cellular Effects. Molecules 2023; 28:6598. [PMID: 37764374 PMCID: PMC10536579 DOI: 10.3390/molecules28186598] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/07/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
The plasma membrane lipid rafts are cholesterol- and sphingolipid-enriched domains that allow regularly distributed, sub-micro-sized structures englobing proteins to compartmentalize cellular processes. These membrane domains can be highly heterogeneous and dynamic, functioning as signal transduction platforms that amplify the local concentrations and signaling of individual components. Moreover, they participate in cell signaling routes that are known to be important targets of environmental toxicants affecting cell redox status and calcium homeostasis, immune regulation, and hormonal functions. In this work, the evidence that plasma membrane raft-like domains operate as hubs for toxicants' cellular actions is discussed, and suggestions for future research are provided. Several studies address the insertion of pesticides and other organic pollutants into membranes, their accumulation in lipid rafts, or lipid rafts' disruption by polychlorinated biphenyls (PCBs), benzo[a]pyrene (B[a]P), and even metals/metalloids. In hepatocytes, macrophages, or neurons, B[a]P, airborne particulate matter, and other toxicants caused rafts' protein and lipid remodeling, oxidative changes, or amyloidogenesis. Different studies investigated the role of the invaginated lipid rafts present in endothelial cells in mediating the vascular inflammatory effects of PCBs. Furthermore, in vitro and in vivo data strongly implicate raft-localized NADPH oxidases, the aryl hydrocarbon receptor, caveolin-1, and protein kinases in the toxic mechanisms of occupational and environmental chemicals.
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Affiliation(s)
- Dorinda Marques-da-Silva
- LSRE—Laboratory of Separation and Reaction Engineering and LCM—Laboratory of Catalysis and Materials, School of Management and Technology, Polytechnic Institute of Leiria, Morro do Lena-Alto do Vieiro, 2411-901 Leiria, Portugal;
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- School of Technology and Management, Polytechnic Institute of Leiria, Morro do Lena-Alto do Vieiro, 2411-901 Leiria, Portugal
| | - Ricardo Lagoa
- LSRE—Laboratory of Separation and Reaction Engineering and LCM—Laboratory of Catalysis and Materials, School of Management and Technology, Polytechnic Institute of Leiria, Morro do Lena-Alto do Vieiro, 2411-901 Leiria, Portugal;
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- School of Technology and Management, Polytechnic Institute of Leiria, Morro do Lena-Alto do Vieiro, 2411-901 Leiria, Portugal
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Su WC, Lee J, Zhang K, Wong SW, Buu A. Estimation of Health Risks Caused by Metals Contained in E-Cigarette Aerosol through Passive Vaping. TOXICS 2023; 11:684. [PMID: 37624189 PMCID: PMC10459233 DOI: 10.3390/toxics11080684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 07/29/2023] [Accepted: 08/04/2023] [Indexed: 08/26/2023]
Abstract
It is expected that secondary exposure to e-cigarette aerosol (passive vaping) will soon become an issue of public health. Passive vaping inhales e-cigarette aerosol containing similar harmful substances as active vaping. However, parallel studies on passive vaping are minimal. Therefore, there is a need for passive vaping-related health risk studies to assess the impact of vaping on public health. This research conducted a series of experiments in a room using a puffing machine and the Mobile Aerosol Lung Deposition Apparatus (MALDA) to study e-cigarette aerosol respiratory deposition through passive vaping. The experimental data acquired were applied to estimate the deposited mass and health risks caused by toxic metals contained in e-cigarette aerosol. Five popular e-cigarette products were used in this study to generate e-cigarette aerosol for deposition experiments. In addition, size-segregated e-cigarette aerosol samples were collected, and metal compositions in the e-cigarette aerosol were analyzed. Results obtained showed that estimated non-cancer risks were all acceptable, with hazard quotient and hazard index all less than 1.0. The calculated cancer risks were also found acceptable, with lifetime excess cancer risk generally less than 1E-6. Therefore, the e-cigarettes tested and the passive vaping exposure scenarios studied do not seem to induce any potential for metal-related respiratory health effects.
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Affiliation(s)
- Wei-Chung Su
- Department of Epidemiology, Human Genetics and Environmental Sciences, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Jinho Lee
- Department of Epidemiology, Human Genetics and Environmental Sciences, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Kai Zhang
- Department of Environmental Health Sciences, School of Public Health, University at Albany, State University of New York, Rensselaer, NY 12144, USA
| | - Su-Wei Wong
- Department of Health Promotion & Behavioral Sciences, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Anne Buu
- Department of Health Promotion & Behavioral Sciences, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
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Fu H, Liu X, Shi L, Wang L, Fang H, Wang X, Song D. Regulatory roles of Osteopontin in lung epithelial inflammation and epithelial-telocyte interaction. Clin Transl Med 2023; 13:e1381. [PMID: 37605313 PMCID: PMC10442477 DOI: 10.1002/ctm2.1381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 08/07/2023] [Accepted: 08/12/2023] [Indexed: 08/23/2023] Open
Abstract
BACKGROUND Lung epithelial cells play important roles in lung inflammation and injury, although mechanisms remain unclear. Osteopontin (OPN) has essential roles in epithelial damage and repair and in lung cancer biological behaviours. Telocyte (TC) is a type of interstitial cell that interacts with epithelial cells to alleviate acute inflammation and lung injury. The present studies aim at exploring potential mechanisms by which OPN regulates the epithelial origin lung inflammation and the interaction of epithelial cells with TCs in acute and chronic lung injury. METHODS The lung disease specificity of OPN and epithelial inflammation were defined by bioinformatics. We evaluated the regulatory roles of OPN in OPN-knockdown or over-expressed bronchial epithelia (HBEs) challenged with cigarette smoke extracts (CSE) or in animals with genome OPN knockout (gKO) or lung conditional OPN knockout (cKO). Acute lung injury and chronic obstructive pulmonary disease (COPD) were induced by smoking or lipopolysaccharide (LPS). Effects of OPN on PI3K subunits and ERK were assessed using the inhibitors. Spatialization and distribution of OPN, OPN-positive epithelial subtypes, and TCs were defined by spatial transcriptomics. The interaction between HBEs and TCs was assayed by the co-culture system. RESULTS Levels of OPN expression increased in smokers, smokers with COPD, and smokers with COPD and lung cancer, as compared with healthy nonsmokers. LPS and/or CSE induced over-production of cytokines from HBEs, dependent upon the dysfunction of OPN. The severity of lung inflammation and injury was significantly lower in OPN-gKO or OPN-cKO mice. HBEs transferred with OPN enhanced the expression of phosphoinositide 3-kinase (PI3K)CA/p110α, PIK3CB/p110β, PIK3CD/p110δ, PIK3CG/p110γ, PIK3R1, PIK3R2 or PIK3R3. Spatial locations of OPN and OPN-positive epithelial subtypes showed the tight contact of airway epithelia and TCs. Epithelial OPN regulated the epithelial communication with TCs, and the down-regulation of OPN induced more alterations in transcriptomic profiles than the up-regulation. CONCLUSION Our data evidenced that OPN regulated lung epithelial inflammation, injury, and cell communication between epithelium and TCs in acute and chronic lung injury. The conditional control of lung epithelial OPN may be an alternative for preventing and treating epithelial-origin lung inflammation and injury.
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Affiliation(s)
- Huirong Fu
- Department of Pulmonary and Critical Care MedicineZhongshan HospitalFudan University Shanghai Medical CollegeShanghaiChina
- Center for Tumor Diagnosis & TherapyJinshan HospitalFudan University Shanghai Medical CollegeShanghaiChina
| | - Xuanqi Liu
- Department of Pulmonary and Critical Care MedicineZhongshan HospitalFudan University Shanghai Medical CollegeShanghaiChina
- Shanghai Institute of Clinical BioinformaticsShanghaiChina
| | - Lin Shi
- Department of Pulmonary and Critical Care MedicineZhongshan HospitalFudan University Shanghai Medical CollegeShanghaiChina
| | - Lingyan Wang
- Shanghai Institute of Clinical BioinformaticsShanghaiChina
- Shanghai Engineering Research for AI Technology for Cardiopulmonary DiseasesShanghaiChina
| | - Hao Fang
- Department of AnesthesiologyZhongshan HospitalFudan University Shanghai Medical CollegeShanghaiChina
- Department of AnesthesiologyShanghai Geriatric Medical CenterShanghaiChina
| | - Xiangdong Wang
- Department of Pulmonary and Critical Care MedicineZhongshan HospitalFudan University Shanghai Medical CollegeShanghaiChina
- Center for Tumor Diagnosis & TherapyJinshan HospitalFudan University Shanghai Medical CollegeShanghaiChina
- Shanghai Institute of Clinical BioinformaticsShanghaiChina
- Shanghai Engineering Research for AI Technology for Cardiopulmonary DiseasesShanghaiChina
| | - Dongli Song
- Department of Pulmonary and Critical Care MedicineZhongshan HospitalFudan University Shanghai Medical CollegeShanghaiChina
- Shanghai Institute of Clinical BioinformaticsShanghaiChina
- Shanghai Engineering Research for AI Technology for Cardiopulmonary DiseasesShanghaiChina
- Department of Pulmonary MedicineShanghai Xuhui Central HospitalFudan UniversityShanghaiChina
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Begum R, Thota S, Batra S. Interplay between proteasome function and inflammatory responses in e-cig vapor condensate-challenged lung epithelial cells. Arch Toxicol 2023; 97:2193-2208. [PMID: 37344694 DOI: 10.1007/s00204-023-03504-5] [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: 02/09/2023] [Accepted: 04/20/2023] [Indexed: 06/23/2023]
Abstract
Exposure to cigarettes and other nicotine-based products results in persistent inflammation in the lung. In recent years, electronic cigarettes (e-cigs) have become extremely popular among adults and youth alike. E-cigarette vapor-induced oxidative stress promotes protein breakdown, DNA damage and cell death, culminating in a variety of respiratory diseases. The proteasome, a multi-catalytic protease, superintends protein degradation within the cell. When cells are stimulated with inflammatory cytokines such as IFN-γ and TNF-α, the constitutive catalytic proteasome subunits are replaced by the inducible subunits-low-molecular mass polypeptide (LMP)2 (β1i), multi-catalytic endopeptidase complex-like (MECL)1 (β2i), and LMP7 (β5i), which are required for the production of certain MHC class I-restricted T-cell epitopes. In this study, we used human alveolar epithelial cells (A549) and exposed them to filtered air or (1%) tobacco-flavored (TF) electronic cigarette vapor condensate (ECVC) ± nicotine (6 mg/ml) (TF-ECVC ± N) for 24 h. We observed an increase in the levels of IFN-γ, TNF-α, and inducible proteasome subunits (LMP7/PSMB8, LMP2/PSMB9, MECL1/PSMB10), and a reduced expression of constitutive proteasome subunits (β1/PSMB6 and β2/PSMB7) in challenged A549 cells. Interestingly, knockdown of the inducible proteasome subunit LMP7 reversed ECVC-induced expression of NADPH oxidase and immunoproteasome subunits in A549 cells. In addition, pre-exposure to an LMP7 inhibitor (ONX-0914) abrogated the mRNA expression of several NOX subunits and rescued the excessive production/release of inflammatory cytokines/chemokines (IL-6, IL-8, CCL2, and CCL5) in ECVC-challenged cells. Our findings suggest an important role of LMP7 in regulating the expression of inflammatory mediators during ECVC exposure. Overall, our results provide evidence for proteasome-dependent ROS-mediated inflammation in ECVC-challenged cells.
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Affiliation(s)
- R Begum
- Laboratory of Pulmonary Immunotoxicology, Department of Environmental Toxicology, Southern University and A&M College, 129 Health Research Center, Baton Rouge, Louisiana, 70813, USA
| | - S Thota
- Laboratory of Pulmonary Immunotoxicology, Department of Environmental Toxicology, Southern University and A&M College, 129 Health Research Center, Baton Rouge, Louisiana, 70813, USA
| | - S Batra
- Laboratory of Pulmonary Immunotoxicology, Department of Environmental Toxicology, Southern University and A&M College, 129 Health Research Center, Baton Rouge, Louisiana, 70813, USA.
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Sabo AN, Filaudeau E, Da Silva S, Becker G, Monassier L, Kemmel V. Flavoured and nicotine-containing e-liquids impair homeostatic properties of an alveolar-capillary cell model. Food Chem Toxicol 2023; 174:113650. [PMID: 36758787 DOI: 10.1016/j.fct.2023.113650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 01/26/2023] [Accepted: 02/01/2023] [Indexed: 02/11/2023]
Abstract
Most people consider that electronic cigarettes are safer than tobacco and are marketed as quit-smoking products. The e-liquid, which usually contains propylene glycol (PG) and vegetable glycerin (VG) in different ratios, nicotine and a wide variety of flavours, is heated by a coil and the aerosol droplets are primarily delivered to the alveolar area where nicotine and other molecules cross the alveolar-capillary barrier (ACB). However, e-cigarettes effects on the ACB are not yet established. In our study, a well-characterised in vitro model of the ACB was exposed to PG and VG and to five flavoured e-liquids with and without nicotine. The vehicles, due to their hypertonic properties, modulated the ACB integrity by modifying occludin expression. Below a 10% concentration, the vehicles did not trigger oxidative stress or cell death. Different results were observed between flavoured e-liquids: while red fruits and mint-eucalyptus disrupted ACB integrity, triggered oxidative stress and cell death, blond tobacco had no worse effect compared to the vehicles. However, the addition of nicotine in the latter e-liquid increased oxidative stress and cell death compared to the vehicles. Finally, mint-eucalyptus e-liquid increased some inflammation markers. Our results revealed that e-liquids alter ACB homeostasis, depending on flavour and nicotine presence.
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Affiliation(s)
- Amelia-Naomi Sabo
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France; Laboratoire de Biochimie et Biologie Moléculaire, Hôpitaux Universitaires de Strasbourg, 67200, Strasbourg, France.
| | - Emma Filaudeau
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France.
| | - Sylvia Da Silva
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France.
| | - Guillaume Becker
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France; Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Pôle Pharmacie-Pharmacologie, 67200, France.
| | - Laurent Monassier
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France.
| | - Véronique Kemmel
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France; Laboratoire de Biochimie et Biologie Moléculaire, Hôpitaux Universitaires de Strasbourg, 67200, Strasbourg, France.
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A Review of Toxicity Mechanism Studies of Electronic Cigarettes on Respiratory System. Int J Mol Sci 2022; 23:ijms23095030. [PMID: 35563421 PMCID: PMC9102406 DOI: 10.3390/ijms23095030] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 04/29/2022] [Accepted: 04/29/2022] [Indexed: 11/16/2022] Open
Abstract
Electronic cigarettes (e-cigarettes) have attracted much attention as a new substitute for conventional cigarettes. E-cigarettes are first exposed to the respiratory system after inhalation, and studies on the toxicity mechanisms of e-cigarettes have been reported. Current research shows that e-cigarette exposure may have potentially harmful effects on cells, animals, and humans, while the safety evaluation of the long-term effects of e-cigarette use is still unknown. Similar but not identical to conventional cigarettes, the toxicity mechanisms of e-cigarettes are mainly manifested in oxidative stress, inflammatory responses, and DNA damage. This review will summarize the toxicity mechanisms and signal pathways of conventional cigarettes and e-cigarettes concerning the respiratory system, which could give researchers a better understanding and direction on the effects of e-cigarettes on our health.
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Marrocco A, Singh D, Christiani DC, Demokritou P. E-cigarette vaping associated acute lung injury (EVALI): state of science and future research needs. Crit Rev Toxicol 2022; 52:188-220. [PMID: 35822508 PMCID: PMC9716650 DOI: 10.1080/10408444.2022.2082918] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 05/19/2022] [Accepted: 05/19/2022] [Indexed: 11/03/2022]
Abstract
"E-Cigarette (e-cig) Vaping-Associated Acute Lung Injury" (EVALI) has been linked to vitamin-E-acetate (VEA) and Δ-9-tetrahydrocannabinol (THC), due to their presence in patients' e-cigs and biological samples. Lacking standardized methodologies for patients' data collection and comprehensive physicochemical/toxicological studies using real-world-vapor exposures, very little data are available, thus the underlying pathophysiological mechanism of EVALI is still unknown. This review aims to provide a comprehensive and critical appraisal of existing literature on clinical/epidemiological features and physicochemical-toxicological characterization of vaping emissions associated with EVALI. The literature review of 161 medical case reports revealed that the predominant demographic pattern was healthy white male, adolescent, or young adult, vaping illicit/informal THC-containing e-cigs. The main histopathologic pattern consisted of diffuse alveolar damage with bilateral ground-glass-opacities at chest radiograph/CT, and increased number of macrophages or neutrophils and foamy-macrophages in the bronchoalveolar lavage. The chemical analysis of THC/VEA e-cig vapors showed a chemical difference between THC/VEA and the single THC or VEA. The chemical characterization of vapors from counterfeit THC-based e-cigs or in-house-prepared e-liquids using either cannabidiol (CBD), VEA, or medium-chain triglycerides (MCT), identified many toxicants, such as carbonyls, volatile organic compounds, terpenes, silicon compounds, hydrocarbons, heavy metals, pesticides and various industrial/manufacturing/automotive-related chemicals. There is very scarce published toxicological data on emissions from THC/VEA e-liquids. However, CBD, MCT, and VEA emissions exert varying degrees of cytotoxicity, inflammation, and lung damage, depending on puffing topography and cell line. Major knowledge gaps were identified, including the need for more systematic-standardized epidemiological surveys, comprehensive physicochemical characterization of real-world e-cig emissions, and mechanistic studies linking emission properties to specific toxicological outcomes.
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Affiliation(s)
- Antonella Marrocco
- Center for Nanotechnology and Nanotoxicology, T.H. Chan School of Public Health, Harvard University, 665 Huntington Ave., Boston, MA 02115, USA
| | - Dilpreet Singh
- Center for Nanotechnology and Nanotoxicology, T.H. Chan School of Public Health, Harvard University, 665 Huntington Ave., Boston, MA 02115, USA
| | - David C. Christiani
- Center for Nanotechnology and Nanotoxicology, T.H. Chan School of Public Health, Harvard University, 665 Huntington Ave., Boston, MA 02115, USA
| | - Philip Demokritou
- Center for Nanotechnology and Nanotoxicology, T.H. Chan School of Public Health, Harvard University, 665 Huntington Ave., Boston, MA 02115, USA
- Environmental Occupational Health Sciences Institute, School of Public Health, Rutgers University, 170 Piscataway, NJ 08854, USA
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Alanazi H, Rouabhia M. Effect of e-cigarette aerosol on gingival mucosa structure and proinflammatory cytokine response. Toxicol Rep 2022; 9:1624-1631. [DOI: 10.1016/j.toxrep.2022.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/20/2022] [Accepted: 08/03/2022] [Indexed: 11/15/2022] Open
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