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Li Z, Feng B, Li X, Zhao J, Liu K, Xie F, Xie J. Analysis of the response to cigarette smoke exposure in cell coculture and monoculture based on bionic-lung microfluidic chips. Anal Chim Acta 2024; 1300:342446. [PMID: 38521574 DOI: 10.1016/j.aca.2024.342446] [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: 12/15/2023] [Revised: 02/25/2024] [Accepted: 03/03/2024] [Indexed: 03/25/2024]
Abstract
BACKGROUND In vitro toxicity assessment studies with various experimental models and exposure modalities frequently generate diverse outcomes. In the prevalent experimental, aerosol pollutants are dissolved in culture medium through capture for exposure to two-dimensional planar cellular models in multiwell plates via immersion. However, this approach can generate restricted and inconclusive experimental data, significantly constraining the applicability of risk assessment outcomes. Herein, the in vitro cocultivation of lung epithelial and/or vascular endothelial cells was performed using self-designed bionic-lung microfluidic chip housing a gas-concentration gradient generator (GCGG) unit. Exposure experiments involving a concentration gradient of cigarette smoke (CS) aerosol were then conducted through an original assembled real-time aerosol exposure system. RESULTS Transcriptomic analysis revealed a potential involvement of the cGMP-signaling pathway following online CS aerosol exposure on different cell culture models. Furthermore, distinct responses to different concentrations of CS aerosol exposure on different culture models were highlighted by detecting inflammation- and oxidative stress-related biomarkers (i.e., cell viability, reactive oxygen species, nitric oxide, IL-6, IL-8, TNF-α, GM-CSF, malondialdehyde, and superoxide dismutase). SIGNIFICANT The results underscore the importance of improving chip biomimicry while addressing multi-throughput demands, given the substantial influence of the coculture model on cellular responses triggered by CS. Furthermore, the coculture model exhibited a mutually beneficial protective effect on cells at low CS concentrations within the GCGG unit, yet revealed a mutually amplified damaging effect at higher CS concentrations in contrast to the monoculture model.
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Affiliation(s)
- Zezhi Li
- Beijing Technology and Business University, Beijing, 100048, PR China; Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China
| | - Boyang Feng
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China
| | - Xiang Li
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China; Beijing Life Science Academy, Beijing, 102209, PR China.
| | - Junwei Zhao
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China; Beijing Life Science Academy, Beijing, 102209, PR China
| | - Kejian Liu
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China
| | - Fuwei Xie
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China
| | - Jianping Xie
- Key Laboratory of Tobacco Chemistry, Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, 450001, PR China; Beijing Life Science Academy, Beijing, 102209, PR China.
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Küstner MJ, Eckstein D, Brauer D, Mai P, Hampl J, Weise F, Schuhmann B, Hause G, Glahn F, Foth H, Schober A. Modular air-liquid interface aerosol exposure system (MALIES) to study toxicity of nanoparticle aerosols in 3D-cultured A549 cells in vitro. Arch Toxicol 2024; 98:1061-1080. [PMID: 38340173 PMCID: PMC10944414 DOI: 10.1007/s00204-023-03673-3] [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: 06/14/2023] [Accepted: 12/20/2023] [Indexed: 02/12/2024]
Abstract
We present a novel lung aerosol exposure system named MALIES (modular air-liquid interface exposure system), which allows three-dimensional cultivation of lung epithelial cells in alveolar-like scaffolds (MatriGrids®) and exposure to nanoparticle aerosols. MALIES consists of multiple modular units for aerosol generation, and can be rapidly assembled and commissioned. The MALIES system was proven for its ability to reliably produce a dose-dependent toxicity in A549 cells using CuSO4 aerosol. Cytotoxic effects of BaSO4- and TiO2-nanoparticles were investigated using MALIES with the human lung tumor cell line A549 cultured at the air-liquid interface. Experiments with concentrations of up to 5.93 × 105 (BaSO4) and 1.49 × 106 (TiO2) particles/cm3, resulting in deposited masses of up to 26.6 and 74.0 µg/cm2 were performed using two identical aerosol exposure systems in two different laboratories. LDH, resazurin reduction and total glutathione were measured. A549 cells grown on MatriGrids® form a ZO-1- and E-Cadherin-positive epithelial barrier and produce mucin and surfactant protein. BaSO4-NP in a deposited mass of up to 26.6 µg/cm2 resulted in mild, reversible damage (~ 10% decrease in viability) to lung epithelium 24 h after exposure. TiO2-NP in a deposited mass of up to 74.0 µg/cm2 did not induce any cytotoxicity in A549 cells 24 h and 72 h after exposure, with the exception of a 1.7 fold increase in the low exposure group in laboratory 1. These results are consistent with previous studies showing no significant damage to lung epithelium by short-term treatment with low concentrations of nanoscale BaSO4 and TiO2 in in vitro experiments.
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Affiliation(s)
- M J Küstner
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, P.O. Box, 98684, Ilmenau, Germany
| | - D Eckstein
- Institute of Environmental Toxicology, Martin-Luther-University Halle-Wittenberg, 06108, Halle (Saale), Germany
| | - D Brauer
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, P.O. Box, 98684, Ilmenau, Germany.
| | - P Mai
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, P.O. Box, 98684, Ilmenau, Germany
| | - J Hampl
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, P.O. Box, 98684, Ilmenau, Germany
| | - F Weise
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, P.O. Box, 98684, Ilmenau, Germany
| | - B Schuhmann
- Institute of Environmental Toxicology, Martin-Luther-University Halle-Wittenberg, 06108, Halle (Saale), Germany
| | - G Hause
- Biocenter, Department of Electron Microscopy, Martin-Luther-University Halle-Wittenberg, 06099, Halle (Saale), Germany
| | - F Glahn
- Institute of Environmental Toxicology, Martin-Luther-University Halle-Wittenberg, 06108, Halle (Saale), Germany
| | - H Foth
- Institute of Environmental Toxicology, Martin-Luther-University Halle-Wittenberg, 06108, Halle (Saale), Germany
| | - A Schober
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, P.O. Box, 98684, Ilmenau, Germany
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Nannu Shankar S, Mital K, Le E, Lewis GS, Eiguren-Fernandez A, Sabo-Attwood T, Wu CY. Assessment of Scanning Mobility Particle Sizer (SMPS) for online monitoring of delivered dose in an in vitro aerosol exposure system. Toxicol In Vitro 2023; 92:105650. [PMID: 37463634 DOI: 10.1016/j.tiv.2023.105650] [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: 10/31/2022] [Revised: 06/02/2023] [Accepted: 07/12/2023] [Indexed: 07/20/2023]
Abstract
Real-time monitoring of dosimetry is critical to mitigating the constraints of offline measurements. To address this need, the use of the Scanning Mobility Particle Sizer (SMPS) to estimate the dose delivered through the Dosimetric Aerosol in Vitro Inhalation Device (DAVID) was assessed. CuO nanoparticles suspended in ethanol at different concentrations (0.01-10 mg/mL) were aerosolized using a Collison nebulizer and diluted with air at a ratio of either 1:3 (setup 1) or 1:18 (setup 2). From the aerosol volume concentrations measured by the SMPS, density of CuO (6.4 g/cm3), collection time (5-30 min), flow rate (0.5 LPM) and deposition area (0.28 cm2), the mass doses (DoseSMPS) were observed to increase exponentially over time and ranged from 0.02 ± 0.001 to 84.75 ± 3.49 μg/cm2. The doses calculated from the Cu concentrations determined by Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) (DoseICP) also increased exponentially over time (0.01 ± 0.01-97.25 ± 1.30 μg/cm2). Regression analysis between DoseICP and DoseSMPS showed R2 ≥ 0.90 for 0.1-10 mg/mL. As demonstrated, the SMPS can be used to monitor the delivered dose in real-time, and controlled delivery of mass doses with a 226-fold range can be attained in ≤30 min in DAVID by adjusting the nebulizer concentration, dilution air and time.
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Affiliation(s)
- Sripriya Nannu Shankar
- Department of Environmental Engineering Sciences, University of Florida, Gainesville, USA.
| | - Kiran Mital
- Department of Mechanical & Aerospace Engineering, University of Florida, Gainesville, USA
| | - Eric Le
- Department of Chemical Engineering, University of Florida, Gainesville, USA
| | | | | | - Tara Sabo-Attwood
- Department of Environmental and Global Health, University of Florida, Gainesville, USA
| | - Chang-Yu Wu
- Department of Environmental Engineering Sciences, University of Florida, Gainesville, USA; Department of Chemical, Environmental, and Materials Engineering, University of Miami, Coral Gables, USA.
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Tilly TB, Ward RX, Morea AF, Nelson MT, Robinson SE, Eiguren-Fernandez A, Lewis GS, Lednicky JA, Sabo-Attwood T, Hussain SM, Wu CY. Toxicity assessment of CeO₂ and CuO nanoparticles at the air-liquid interface using bioinspired condensational particle growth. HYGIENE AND ENVIRONMENTAL HEALTH ADVANCES 2023; 7:100074. [PMID: 37711680 PMCID: PMC10500621 DOI: 10.1016/j.heha.2023.100074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
CeO2 and CuO nanoparticles (NPs) are used as additives in petrodiesel to enhance engine performance leading to reduced diesel combustion emissions. Despite their benefits, the additive application poses human health concerns by releasing inhalable NPs into the ambient air. In this study, a bioinspired lung cell exposure system, Dosimetric Aerosol in Vitro Inhalation Device (DAVID), was employed for evaluating the toxicity of aerosolized CeO2 and CuO NPs with a short duration of exposure (≤10 min vs. hours in other systems) and without exerting toxicity from non-NP factors. Human epithelial A549 lung cells were cultured and maintained within DAVID at the air-liquid interface (ALI), onto which aerosolized NPs were deposited, and experiments in submerged cells were used for comparison. Exposure of the cells to the CeO2 NPs did not result in detectable IL-8 release, nor did it produce a significant reduction in cell viability based on lactate dehydrogenase (LDH) assay, with a marginal decrease (10%) at the dose of 388 μg/cm2 (273 cm2/cm2). In contrast, exposure to CuO NPs resulted in a concentration dependent reduction in LDH release based on LDH leakage, with 38% reduction in viability at the highest dose of 52 μg/cm2 (28.3 cm2/cm2). Cells exposed to CuO NPs resulted in a dose dependent cellular membrane toxicity and expressed IL-8 secretion at a global dose five times lower than cells exposed under submerged conditions. However, when comparing the ALI results at the local cellular dose of CuO NPs to the submerged results, the IL-8 secretion was similar. In this study, we demonstrated DAVID as a new exposure tool that helps evaluate aerosol toxicity in simulated lung environment. Our results also highlight the necessity in choosing the right assay endpoints for the given exposure scenario, e.g., LDH for ALI and Deep Blue for submerged conditions for cell viability.
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Affiliation(s)
- Trevor B. Tilly
- Department of Environmental Engineering Sciences, Engineering School of Sustainable Infrastructure and Environment, University of Florida, Gainesville, FL, United States
- 711th Human Performance Wing, Air Force Research Laboratory, Wright-Patterson AFB, Ohio, United States
| | - Ryan X. Ward
- Department of Environmental Engineering Sciences, Engineering School of Sustainable Infrastructure and Environment, University of Florida, Gainesville, FL, United States
| | - Alyssa F. Morea
- Department of Environmental Engineering Sciences, Engineering School of Sustainable Infrastructure and Environment, University of Florida, Gainesville, FL, United States
| | - M. Tyler Nelson
- 711th Human Performance Wing, Air Force Research Laboratory, Wright-Patterson AFB, Ohio, United States
| | - Sarah E. Robinson
- Department of Environmental & Global Health, College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States
| | | | | | - John A. Lednicky
- Department of Environmental & Global Health, College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States
| | - Tara Sabo-Attwood
- Department of Environmental & Global Health, College of Public Health and Health Professions, University of Florida, Gainesville, FL, United States
| | - Saber M. Hussain
- 711th Human Performance Wing, Air Force Research Laboratory, Wright-Patterson AFB, Ohio, United States
| | - Chang-Yu Wu
- Department of Environmental Engineering Sciences, Engineering School of Sustainable Infrastructure and Environment, University of Florida, Gainesville, FL, United States
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Li H, Nannu Shankar S, Witanachchi CT, Lednicky JA, Loeb JC, Alam MM, Fan ZH, Lauzardo M, Mohamed K, Eiguren-Fernandez A, Wu CY. Lack of SARS-CoV-2 in environmental samples collected from September 2020-February 2021 in a university that followed CDC reopening guidance. HYGIENE AND ENVIRONMENTAL HEALTH ADVANCES 2023; 7:100061. [PMID: 37305381 PMCID: PMC10198740 DOI: 10.1016/j.heha.2023.100061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 04/27/2023] [Accepted: 05/15/2023] [Indexed: 06/13/2023]
Abstract
This study aimed to provide environmental surveillance data for evaluating the risk of acquiring SARS-CoV-2 in public areas with high foot traffic in a university. Air and surface samples were collected at a university that had the second highest number of COVID-19 cases among public higher education institutions in the U.S. during Fall 2020. A total of 60 samples were collected in 16 sampling events performed during Fall 2020 and Spring 2021. Nearly 9800 students traversed the sites during the study period. SARS-CoV-2 was not detected in any air or surface samples. The university followed CDC guidance, including COVID-19 testing, case investigations, and contact tracing. Students, faculty, and staff were asked to maintain physical distancing and wear face coverings. Although COVID-19 cases were relatively high at the university, the possibility of acquiring SARS-CoV-2 infections at the sites tested was low.
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Affiliation(s)
- Hongwan Li
- Department of Occupational and Environmental Health, University of Oklahoma Health Sciences Center, USA
- Department of Environmental Engineering Sciences, University of Florida, USA
| | | | | | - John A Lednicky
- Department of Environmental and Global Health, University of Florida, USA
- Emerging Pathogens Institute, University of Florida, USA
| | - Julia C Loeb
- Department of Environmental and Global Health, University of Florida, USA
- Emerging Pathogens Institute, University of Florida, USA
| | - Md Mahbubul Alam
- Department of Environmental and Global Health, University of Florida, USA
- Emerging Pathogens Institute, University of Florida, USA
| | - Z Hugh Fan
- Department of Mechanical & Aerospace Engineering, University of Florida, USA
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, USA
| | - Michael Lauzardo
- Emerging Pathogens Institute, University of Florida, USA
- Department of Medicine, University of Florida, USA
| | - Karim Mohamed
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, USA
| | | | - Chang-Yu Wu
- Department of Environmental Engineering Sciences, University of Florida, USA
- Department of Chemical, Environmental and Materials Engineering, University of Miami, USA
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6
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Liu C, Hu H, Zhou S, Chen X, Hu Y, Hu J. Change of Composition, Source Contribution, and Oxidative Effects of Environmental PM 2.5 in the Respiratory Tract. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:11605-11611. [PMID: 37487019 DOI: 10.1021/acs.est.3c02780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
Fine particulate matter is a leading air pollutant, and its composition profile relates to sources and health effects. The human respiratory tract hosts a warmer and more humid microenvironment in contrast with peripheral environments. However, how the human respiratory tract impacts the transformation of the composition of environmental PM2.5 once they are inhaled and consequently changes of source contribution and health effects are unknown. Here, we show that the respiratory tract can make these properties of PM2.5 reaching the lung different from environmental PM2.5. We found via an in vitro model that the warm and humid conditions drive the desorption of nitrate (about 60%) and ammonium (about 31%) out of PM2.5 during the inhalation process and consequently make source contribution profiles for respiratory tract-deposited PM2.5 different from that for environmental PM2.5 as suggested in 11 Chinese cities and 12 US cities. We also observed that oxidative potential, one of the main health risk causes of PM2.5, increases by 41% after PM2.5 travels through the respiratory tract model. Our results reveal that PM2.5 inhaled in the lung differs from environmental PM2.5. This work provides a starting point for more health-oriented source apportionment, physiology-based health evaluation, and cost-effective control of PM2.5 pollution.
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Affiliation(s)
- Cong Liu
- School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China
- Engineering Research Center of Building Equipment, Energy, and Environment, Ministry of Education, Beijing 100816, China
| | - Hao Hu
- School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China
| | - Shuonv Zhou
- School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China
| | - Xiaole Chen
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, Jiangsu, China
| | - Yongtao Hu
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Jianlin Hu
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu, China
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7
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Humbert MV, Spalluto CM, Bell J, Blume C, Conforti F, Davies ER, Dean LSN, Elkington P, Haitchi HM, Jackson C, Jones MG, Loxham M, Lucas JS, Morgan H, Polak M, Staples KJ, Swindle EJ, Tezera L, Watson A, Wilkinson TMA. Towards an artificial human lung: modelling organ-like complexity to aid mechanistic understanding. Eur Respir J 2022; 60:2200455. [PMID: 35777774 DOI: 10.1183/13993003.00455-2022] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 06/11/2022] [Indexed: 11/05/2022]
Abstract
Respiratory diseases account for over 5 million deaths yearly and are a huge burden to healthcare systems worldwide. Murine models have been of paramount importance to decode human lung biology in vivo, but their genetic, anatomical, physiological and immunological differences with humans significantly hamper successful translation of research into clinical practice. Thus, to clearly understand human lung physiology, development, homeostasis and mechanistic dysregulation that may lead to disease, it is essential to develop models that accurately recreate the extraordinary complexity of the human pulmonary architecture and biology. Recent advances in micro-engineering technology and tissue engineering have allowed the development of more sophisticated models intending to bridge the gap between the native lung and its replicates in vitro Alongside advanced culture techniques, remarkable technological growth in downstream analyses has significantly increased the predictive power of human biology-based in vitro models by allowing capture and quantification of complex signals. Refined integrated multi-omics readouts could lead to an acceleration of the translational pipeline from in vitro experimental settings to drug development and clinical testing in the future. This review highlights the range and complexity of state-of-the-art lung models for different areas of the respiratory system, from nasal to large airways, small airways and alveoli, with consideration of various aspects of disease states and their potential applications, including pre-clinical drug testing. We explore how development of optimised physiologically relevant in vitro human lung models could accelerate the identification of novel therapeutics with increased potential to translate successfully from the bench to the patient's bedside.
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Affiliation(s)
- Maria Victoria Humbert
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - Cosma Mirella Spalluto
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
- M.V. Humbert and C.M. Spalluto are co-first authors and contributed equally to this work
| | - Joseph Bell
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
| | - Cornelia Blume
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
- Institute for Life Sciences, University of Southampton, Southampton, UK
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Franco Conforti
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
| | - Elizabeth R Davies
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, UK
| | - Lareb S N Dean
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
| | - Paul Elkington
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
- Institute for Life Sciences, University of Southampton, Southampton, UK
| | - Hans Michael Haitchi
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
- Institute for Life Sciences, University of Southampton, Southampton, UK
| | - Claire Jackson
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
| | - Mark G Jones
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
| | - Matthew Loxham
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
- Institute for Life Sciences, University of Southampton, Southampton, UK
| | - Jane S Lucas
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
| | - Hywel Morgan
- Institute for Life Sciences, University of Southampton, Southampton, UK
- Electronics and Computer Science, Faculty of Physical Sciences and Engineering, University of Southampton, Southampton, UK
| | - Marta Polak
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
- Institute for Life Sciences, University of Southampton, Southampton, UK
| | - Karl J Staples
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
| | - Emily J Swindle
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
- Institute for Life Sciences, University of Southampton, Southampton, UK
| | - Liku Tezera
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- Department of Infection and Immunity, Faculty of Medicine, University College London, London, UK
| | - Alastair Watson
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
- School of Clinical Medicine, University of Cambridge, Cambridge, UK
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - Tom M A Wilkinson
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
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Yu S, Zhou X, Hu P, Chen H, Shen F, Yu C, Meng H, Zhang Y, Wu Y. Inhalable particle-bound marine biotoxins in a coastal atmosphere: Concentration levels, influencing factors and health risks. JOURNAL OF HAZARDOUS MATERIALS 2022; 434:128925. [PMID: 35460997 DOI: 10.1016/j.jhazmat.2022.128925] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 03/31/2022] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
Characterizing marine biotoxins (MBs) composition in coastal aerosol particles has become essential to tracking sources of atmospheric contaminants and assessing human inhalable exposure risks to air particles. Here, coastal aerosol particles were collected over an almost 3-year period for the analysis of eight representative MBs, including brevetoxin (BTX), okadaic acid (OA), pectenotoxin-2 (PTX-2), domoic acid (DA), tetrodotoxin (TTX), saxitoxin (STX), ciguatoxin (CTX) and ω-Conotoxin. Our data showed that the levels of inhalable airborne marine biotoxins (AMBs) varied greatly among the subcategories and over time. Both in daytime and nighttime, a predominance of coarse-mode AMB particles was found for all the target AMBs. Based on the experimental data, we speculate that an ambient AMB might have multiple sources/production pathways, which include air-sea aerosol production and direct generation and release from toxigenic microalgae/bacteria suspended in surface seawater or air, and different sources may make different contribution. Regardless of the subcategory, the highest deposition efficiency of an individual AMB was found in the head airway region, followed by the alveolar and tracheobronchial regions. This study provides new information about inhalable MBs in the coastal atmosphere. The coexistence of various particle-bound MBs raises concerns about potential health risks from exposure to coastal air particles.
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Affiliation(s)
- Song Yu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Xuedong Zhou
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Peiwen Hu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Haoxuan Chen
- Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California Los Angeles, Los Angeles, CA 90095, United States
| | - Fangxia Shen
- School of Space and Environment, Beihang University, Beijing 100083, China
| | - Chenglin Yu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - He Meng
- Qingdao Eco-Environment Monitoring Center of Shandong Province, Qingdao 266003, China
| | - Yong Zhang
- Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China
| | - Yan Wu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.
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Mu N, Wang H, Chen D, Wang F, Ji L, Zhang C, Li M, Lu P. A Novel Rat Model of Dry Eye Induced by Aerosol Exposure of Particulate Matter. Invest Ophthalmol Vis Sci 2022; 63:39. [PMID: 35089331 PMCID: PMC8802024 DOI: 10.1167/iovs.63.1.39] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Purpose The purpose of this study was to introduce a novel dry eye rat model induced by aerosol exposure of particulate matter (PM). Methods A total of 30 female Sprague Dawley (SD) rats divided into 3 groups: the control group, the low-level exposed group, and the high-level exposed group. The rats in the experience groups were directly exposed to PM samples in the exposure chamber over 14 days. The clinical observation, including tear volume, corneal fluorescein staining, breakup time (BUT), inflammation index, corneal irregularity score, and corneal confocal microscopy. Eyeballs were collected on day 14 for hematoxylin and eosin (H&E) staining and PAS staining. TUNEL assay, CD45, and Ki67 immunostaining was performed and corneal ultrastructural changes were detected by electron microscopy. IL-1β, TNF-α, IFN-γ, and NF-κB Western blot analysis were used to observe the possible pathogenesis. Results In the PM-treated groups, the number of layers in the corneal epithelium and corneal nerve fiber length were significantly decreased compared with that of the control group. The number of corneal epithelial microvilli and chondriosome/desmosomes were drastically reduced in PM-treated groups. Confocal microscopy and CD45 immunohistochemistry showed inflammatory cell infiltration in the PM-treated groups. PM caused apoptosis of corneal and conjunctival epithelial cells while leading to abnormal epithelial cell proliferation, meanwhile, conjunctival goblet cells in the PM-treated group were also significantly reduced. PM significantly increased the levels of IL-1β, TNF-α, IFN-γ, and p-NF-κB-p65 in the cornea. Conclusions Aerosol exposure of PM can reduce the stability of tear film and cause the change of ocular surface, which is similar to the performance of human dry eye, suggesting a novel animal model of dry eye.
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Affiliation(s)
- Ning Mu
- Department of Ophthalmology, the First Affiliated Hospital of Soochow University, Suzhou, , Jiangsu Province, P.R. China.,Department of Ophthalmology, the Affiliated Hospital of XuZhou Medical University, Xuzhou, Jiangsu Province, P.R. China
| | - He Wang
- Department of Ophthalmology, the Affiliated Hospital of XuZhou Medical University, Xuzhou, Jiangsu Province, P.R. China
| | - Dongyan Chen
- Department of Ophthalmology, the Affiliated Hospital of XuZhou Medical University, Xuzhou, Jiangsu Province, P.R. China
| | - Fan Wang
- Department of Ophthalmology, the Affiliated Hospital of XuZhou Medical University, Xuzhou, Jiangsu Province, P.R. China
| | - Ling Ji
- Department of Ophthalmology, the Affiliated Hospital of XuZhou Medical University, Xuzhou, Jiangsu Province, P.R. China
| | - Can Zhang
- Department of Ophthalmology, the Affiliated Hospital of XuZhou Medical University, Xuzhou, Jiangsu Province, P.R. China
| | - Mingxin Li
- Department of Ophthalmology, the Affiliated Hospital of XuZhou Medical University, Xuzhou, Jiangsu Province, P.R. China
| | - Peirong Lu
- Department of Ophthalmology, the First Affiliated Hospital of Soochow University, Suzhou, , Jiangsu Province, P.R. China
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Li H, Shankar SN, Witanachchi CT, Lednicky JA, Loeb JC, Alam MM, Fan ZH, Mohamed K, Eiguren-Fernandez A, Wu CY. Environmental Surveillance and Transmission Risk Assessments for SARS-CoV-2 in a Fitness Center. AEROSOL AND AIR QUALITY RESEARCH 2021; 21:210106. [PMID: 35047025 PMCID: PMC8765736 DOI: 10.4209/aaqr.210106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Fitness centers are considered high risk for SARS-CoV-2 transmission due to their high human occupancy and the type of activity taking place in them, especially when individuals pre-symptomatic or asymptomatic for COVID-19 exercise in the facilities. In this study, air (N=21) and surface (N=8) samples were collected at a fitness center through five sampling events from August to November 2020 after the reopening restrictions were lifted in Florida. The total attendance was ~2500 patrons during our air and environmental sampling work. Air samples were collected using stationary and personal bioaerosol samplers. Moistened flocked nylon swabs were used to collect samples from high-touch surfaces. We did not detect SARS-CoV-2 by rRT-PCR analyses in any air or surface sample. A simplified infection risk model based on the Wells-Riley equation predicts that the probability of infection in this fitness center was 1.77% following its ventilation system upgrades based on CDC guidelines, and that risk was further reduced to 0.89% when patrons used face masks. Our model also predicts that a combination of high ventilation, minimal air recirculation, air filtration, and UV sterilization of recirculated air reduced the infection risk up to 94% compared to poorly ventilated facilities. Amongst these measures, high ventilation with outdoor air is most critical in reducing the airborne transmission of SARS-CoV-2. For buildings that cannot avoid air recirculation due to energy costs, the use of high filtration and/or air disinfection devices are alternatives to reducing the probability of acquiring SARS-CoV-2 through inhalation exposure. In contrast to the perceived ranking of high risk, the infection risk in fitness centers that follow CDC reopening guidance, including implementation of engineering and administrative controls, and use of personal protective equipment, can be low, and these facilities can offer a relatively safe venue for patrons to exercise.
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Affiliation(s)
- Hongwan Li
- Department of Environmental Engineering Sciences, University of Florida, USA
| | | | | | - John A Lednicky
- Department of Environmental and Global Health, University of Florida, USA
- Emerging Pathogens Institute, University of Florida, USA
| | - Julia C Loeb
- Department of Environmental and Global Health, University of Florida, USA
- Emerging Pathogens Institute, University of Florida, USA
| | - Md Mahbubul Alam
- Department of Environmental and Global Health, University of Florida, USA
- Emerging Pathogens Institute, University of Florida, USA
| | - Z Hugh Fan
- Department of Mechanical & Aerospace Engineering, University of Florida, USA
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, USA
| | - Karim Mohamed
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, USA
| | | | - Chang-Yu Wu
- Department of Environmental Engineering Sciences, University of Florida, USA
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11
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Ke S, Liu Q, Zhang X, Yao Y, Yang X, Sui G. Cytotoxicity analysis of biomass combustion particles in human pulmonary alveolar epithelial cells on an air-liquid interface/dynamic culture platform. Part Fibre Toxicol 2021; 18:31. [PMID: 34419099 PMCID: PMC8379799 DOI: 10.1186/s12989-021-00426-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 08/05/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Exposure to indoor air pollution from solid fuel combustion is associated with lung diseases and cancer. This study investigated the cytotoxicity and molecular mechanisms of biomass combustion-derived particles in human pulmonary alveolar epithelial cells (HPAEpiC) using a platform that combines air-liquid interface (ALI) and dynamic culture (DC) systems. METHODS HPAEpiC were cultured on the surface of polycarbonate (PC) membranes on the ALI-DC platform. The cells were sprayed with an aerosolized solution of biomass combustion soluble constituents (BCSCs) and simultaneously nourished with culture medium flowing beneath the permeable PC membranes. The ALI-DC method was compared with the traditional submerged culture approach. BCSC particle morphology and dosages deposited on the chip were determined for particle characterization. Flow cytometry, scanning electron microscopy, and transmission electron microscopy were used to investigate the apoptosis rate of HPAEpiC and changes in the cell ultrastructure induced by BCSCs. Additionally, the underlying apoptotic pathway was examined by determining the protein expression levels by western blotting. RESULTS Scanning electron microscope images demonstrated that the sample processing and delivering approach of the ALI-DC platform were suitable for pollutant exposure. Compared with the submerged culture method, a significant decline in cell viability and increase in apoptosis rate was observed after BCSC exposure on the ALI-DC platform, indicating that the ALI-DC platform is a more sensitive system for investigating cytotoxicity of indoor air pollutants in lung cells. The morphology and ultrastructure of the cells were damaged after exposure to BCSCs, and the p53 pathway was activated. The Bcl-2/Bax ratio was reduced, upregulating caspase-9 and caspase-3 expression and subsequently inducing apoptosis of HPAEpiC. The addition of N-acetyl cysteine antioxidant significantly alleviated the cytotoxicity induced by BCSCs. CONCLUSION A novel ALI-DC platform was developed to study the cytotoxicity of air pollutants on lung cells. Using the platform, we demonstrated that BCSCs could damage the mitochondria, produce reactive oxygen species, and activate p53 in HPAEpiC, ultimately inducing apoptosis.
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Affiliation(s)
- Shaorui Ke
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P.R. China, Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, 450046 People’s Republic of China
- Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University, Shanghai, 200433 People’s Republic of China
| | - Qi Liu
- Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University, Shanghai, 200433 People’s Republic of China
| | - Xinlian Zhang
- Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University, Shanghai, 200433 People’s Republic of China
| | - Yuhan Yao
- Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University, Shanghai, 200433 People’s Republic of China
| | - Xudong Yang
- Department of Building Science, Tsinghua University, Beijing, 100084 People’s Republic of China
| | - Guodong Sui
- Shanghai Key Laboratory of Atmospheric Particle Pollution Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University, Shanghai, 200433 People’s Republic of China
- Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), Nanjing University of Information Science & Technology, Nanjing, 210044 People’s Republic of China
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Knobloch J, Casjens S, Lehnert M, Yanik SD, Körber S, Lotz A, Rupp J, Raulf M, Zschiesche W, Weiss T, Kronsbein J, Koch A, Brüning T, Pesch B. Exposure to welding fumes suppresses the activity of T-helper cells. ENVIRONMENTAL RESEARCH 2020; 189:109913. [PMID: 32980007 DOI: 10.1016/j.envres.2020.109913] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
Welders have an increased susceptibility to airway infections with non-typeable Haemophilus influenzae (NTHi), which implicates immune defects and might promote pneumonia and chronic obstructive pulmonary disease (COPD). We hypothesized that welding-fume exposure suppresses Th1-lymphocyte activity. Non-effector CD4+ T-cells from blood of 45 welders (n = 23 gas metal arc welders, GMAW; n = 16 tungsten inert gas welders, TIG; n = 6 others) and 25 non-welders were ex vivo activated towards Th1 via polyclonal T-cell receptor stimulation and IL-12 (first activation step) and then stimulated with NTHi extract or lipopolysaccharide (LPS) (second activation step). IFNγ and IL-2 were measured by ELISA. In the first activation step, IFNγ was reduced in welders compared to non-welders and in the GMAW welders with higher concentrations of respirable particles compared to the lower exposed TIG welders. IFNγ was not influenced by tobacco smoking and correlated negatively with welding-fume exposure, respirable manganese, and iron. In the second activation step, NTHi and LPS induced additional IFNγ, which was reduced in current smokers compared to never smokers in welders as well as in non-welders. Analyzing both activation steps together, IFNγ production was lowest in smoking welders and highest in never smoking non-welders. IL-2 was not associated with any of these parameters. Welding-fume exposure might suppress Th1-based immune responses due to effects of particulate matter, which mainly consists of iron and manganese. For responses to NTHi this is strongest in smoking welders because welding fume suppresses T-cell activation towards Th1 and cigarette smoke suppresses the subsequent Th1-response to NTHi via LPS. Both effects are independent from IL-2-regulated T-cell proliferation. This might explain the increased susceptibility to infections and might promote COPD development.
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Affiliation(s)
- Jürgen Knobloch
- Medical Clinic III for Pneumology Allergology, Sleep-, and Respiratory Medicine, Bergmannsheil University Hospital, Ruhr University Bochum; Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany.
| | - Swaantje Casjens
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA); Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Martin Lehnert
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA); Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Sarah D Yanik
- Medical Clinic III for Pneumology Allergology, Sleep-, and Respiratory Medicine, Bergmannsheil University Hospital, Ruhr University Bochum; Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Sandra Körber
- Medical Clinic III for Pneumology Allergology, Sleep-, and Respiratory Medicine, Bergmannsheil University Hospital, Ruhr University Bochum; Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Anne Lotz
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA); Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Jan Rupp
- Department of Infectious Diseases and Microbiology, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany
| | - Monika Raulf
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA); Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Wolfgang Zschiesche
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA); Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Tobias Weiss
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA); Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Juliane Kronsbein
- Medical Clinic III for Pneumology Allergology, Sleep-, and Respiratory Medicine, Bergmannsheil University Hospital, Ruhr University Bochum; Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Andrea Koch
- Zürcher RehaZentren Davos, Klinikstrasse 6, 7272 Davos-Clavadel, Switzerland; Ludwig-Maximilians-University of Munich (LMU) and DZL (German Center of Lung Science), 81377 Munich, Germany
| | - Thomas Brüning
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA); Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Beate Pesch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA); Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
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