1
|
Daniel J, Schönberger Alvarez AA, te Heesen P, Lehrheuer B, Pischinger S, Hollert H, Roß-Nickoll M, Du M. Air-liquid interface exposure of A549 human lung cells to characterize the hazard potential of a gaseous bio-hybrid fuel blend. PLoS One 2024; 19:e0300772. [PMID: 38913629 PMCID: PMC11195957 DOI: 10.1371/journal.pone.0300772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 06/06/2024] [Indexed: 06/26/2024] Open
Abstract
Gaseous and semi-volatile organic compounds emitted by the transport sector contribute to air pollution and have adverse effects on human health. To reduce harmful effects to the environment as well as to humans, renewable and sustainable bio-hybrid fuels are explored and investigated in the cluster of excellence "The Fuel Science Center" at RWTH Aachen University. However, data on the effects of bio-hybrid fuels on human health is scarce, leaving a data gap regarding their hazard potential. To help close this data gap, this study investigates potential toxic effects of a Ketone-Ester-Alcohol-Alkane (KEAA) fuel blend on A549 human lung cells. Experiments were performed using a commercially available air-liquid interface exposure system which was optimized beforehand. Then, cells were exposed at the air-liquid interface to 50-2000 ppm C3.7 of gaseous KEAA for 1 h. After a 24 h recovery period in the incubator, cells treated with 500 ppm C3.7 KEAA showed significant lower metabolic activity and cells treated with 50, 250, 500 and 1000 ppm C3.7 KEAA showed significant higher cytotoxicity compared to controls. Our data support the international occupational exposure limits of the single KEAA constituents. This finding applies only to the exposure scenario tested in this study and is difficult to extrapolate to the complex in vivo situation.
Collapse
Affiliation(s)
- Jonas Daniel
- Institute for Environmental Research, RWTH Aachen University, Aachen, Germany
| | | | - Pia te Heesen
- Institute for Environmental Research, RWTH Aachen University, Aachen, Germany
| | - Bastian Lehrheuer
- TME—Chair of Thermodynamics of Mobile Energy Conversion Systems, RWTH Aachen University, Aachen, Germany
| | - Stefan Pischinger
- TME—Chair of Thermodynamics of Mobile Energy Conversion Systems, RWTH Aachen University, Aachen, Germany
| | - Henner Hollert
- Department Evolutionary Ecology & Environmental Toxicology (E3T), Faculty Biological Sciences (FB15), Goethe University Frankfurt, Frankfurt, Germany
- Department Environmental Media Related Ecotoxicology, Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Schmallenberg, Germany
| | - Martina Roß-Nickoll
- Institute for Environmental Research, RWTH Aachen University, Aachen, Germany
| | - Miaomiao Du
- Institute for Environmental Research, RWTH Aachen University, Aachen, Germany
| |
Collapse
|
2
|
Bouyssi A, Déméautis T, Trecourt A, Delles M, Agostini F, Monneret G, Glehen O, Wallon M, Persat F, Devouassoux G, Bentaher A, Menotti J. Characterization of Lung Inflammatory Response to Aspergillus fumigatus Spores. J Fungi (Basel) 2023; 9:682. [PMID: 37367618 DOI: 10.3390/jof9060682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 06/05/2023] [Accepted: 06/15/2023] [Indexed: 06/28/2023] Open
Abstract
The airway exposure to Aspergillus fumigatus spores (AFsp) is associated with an inflammatory response, potentially leading to allergic and/or chronic pulmonary aspergillosis. The aim of our study is to better understand the host response, first in vitro, then in vivo, following the chronic exposure of mice to AFsp. We investigated the inflammatory response to AFsp in cell mono- and co-culture systems with murine macrophages and alveolar epithelial cells. The mice were subjected to two intranasal instillations using 105 AFsp. Their lungs were processed for inflammatory and histopathological analyses. In cell culture, the gene expressions significantly increased for TNF-α, CXCL-1, CXCL-2, IL-1β, IL-1α and GM-CSF in macrophages, with these increases being limited for TNF-α, CXCL-1 and IL-1α in epithelial cells. In co-culture, increases in the TNF-α, CXCL-2 and CXCL-1 gene expressions were observed to be associated with increased protein levels. The in vivo lung histological analyses of mice challenged by AFsp showed cellular infiltrates in the peribronchial and/or alveolar spaces. A Bio-Plex approach on the bronchoalveolar lavage revealed significant increases in the protein secretion of selected mediators of the challenged mice compared to the unchallenged mice. In conclusion, the exposure to AFsp resulted in a marked inflammatory response of macrophages and epithelial cells. These inflammatory findings were confirmed in mouse models associated with lung histologic changes.
Collapse
Affiliation(s)
- Alexandra Bouyssi
- UR3738 Centre pour l'lnnovation en Cancérologie de Lyon, Team Inflammation and Immunity of the Respiratory Epithelium, Claude Bernard University-Lyon 1, 69495 Pierre Bénite, France
| | - Tanguy Déméautis
- UR3738 Centre pour l'lnnovation en Cancérologie de Lyon, Team Inflammation and Immunity of the Respiratory Epithelium, Claude Bernard University-Lyon 1, 69495 Pierre Bénite, France
| | - Alexis Trecourt
- UR3738 Centre pour l'lnnovation en Cancérologie de Lyon, Team Inflammation and Immunity of the Respiratory Epithelium, Claude Bernard University-Lyon 1, 69495 Pierre Bénite, France
- Department of Pathology, South Lyon Hospital, Hospices Civils de Lyon, 69495 Pierre Bénite, France
| | - Marie Delles
- UR3738 Centre pour l'lnnovation en Cancérologie de Lyon, Team Inflammation and Immunity of the Respiratory Epithelium, Claude Bernard University-Lyon 1, 69495 Pierre Bénite, France
| | - Fany Agostini
- UR3738 Centre pour l'lnnovation en Cancérologie de Lyon, Team Inflammation and Immunity of the Respiratory Epithelium, Claude Bernard University-Lyon 1, 69495 Pierre Bénite, France
| | - Guillaume Monneret
- Immunology Laboratory, EA7426, Edouard Herriot Hospital, Hospices Civils de Lyon and Claude Bernard University-Lyon 1, 69003 Lyon, France
| | - Olivier Glehen
- UR3738 Centre pour l'lnnovation en Cancérologie de Lyon, Surgical Department, South Lyon Hospital, Hospices Civils de Lyon, Claude Bernard University-Lyon 1, 69495 Pierre Bénite, France
| | - Martine Wallon
- Department of Medical Mycology and Parasitology, Institute of Infectious Agents, Croix-Rousse Hospital, Hospices Civils de Lyon, 69004 Lyon, France
| | - Florence Persat
- UR3738 Centre pour l'lnnovation en Cancérologie de Lyon, Team Inflammation and Immunity of the Respiratory Epithelium, Claude Bernard University-Lyon 1, 69495 Pierre Bénite, France
- Department of Medical Mycology and Parasitology, Institute of Infectious Agents, Croix-Rousse Hospital, Hospices Civils de Lyon, 69004 Lyon, France
| | - Gilles Devouassoux
- UR3738 Centre pour l'lnnovation en Cancérologie de Lyon, Team Inflammation and Immunity of the Respiratory Epithelium, Claude Bernard University-Lyon 1, 69495 Pierre Bénite, France
- Department of Pulmonology, Croix-Rousse Hospital, Hospices Civils de Lyon, 69004 Lyon, France
| | - Abderrazzak Bentaher
- UR3738 Centre pour l'lnnovation en Cancérologie de Lyon, Team Inflammation and Immunity of the Respiratory Epithelium, Claude Bernard University-Lyon 1, 69495 Pierre Bénite, France
| | - Jean Menotti
- UR3738 Centre pour l'lnnovation en Cancérologie de Lyon, Team Inflammation and Immunity of the Respiratory Epithelium, Claude Bernard University-Lyon 1, 69495 Pierre Bénite, France
- Department of Medical Mycology and Parasitology, Institute of Infectious Agents, Croix-Rousse Hospital, Hospices Civils de Lyon, 69004 Lyon, France
| |
Collapse
|
3
|
Thá EL, Gagosian VSC, Canavez ADPM, Schuck DC, Brohem CA, Gradia DF, de Freitas RA, Prado KB, Cestari MM, Lorencini M, Leme DM. In vitro evaluation of the inhalation toxicity of the cosmetic ingredient aluminum chlorohydrate. J Appl Toxicol 2022; 42:2016-2029. [PMID: 35883269 DOI: 10.1002/jat.4371] [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: 02/04/2022] [Revised: 07/14/2022] [Accepted: 07/22/2022] [Indexed: 11/08/2022]
Abstract
Aluminum chlorohydrate (ACH) is a major aerosol component frequently used as the active ingredient in antiperspirants, and in vivo studies have raised a concern about its inhalation toxicity. Still, few studies have addressed its effects on the human respiratory tract. Therefore, we developed a study on ACH inhalation toxicity using an in vitro human alveolar cell model (A549 cells) with molecular and cellular markers of oxidative stress, immunotoxicity, and epigenetic changes. The chemical characterization of ACH suspensions indicated particle instability and aggregation; however, side-scatter analysis demonstrated significant particle uptake in cells exposed to ACH. Exposure of A549 cells to non-cytotoxic concentrations of ACH (0.25, 0.5, and 1 mg/ml) showed that ACH induced reactive oxygen species. Moreover, ACH upregulated TNF, IL6, IL8, and IL1A genes, but not the lncRNAs NEAT1 and MALAT1. Finally, no alterations on the global DNA methylation pattern (5-methylcytosine and 5-hydroxymethylcytosine) or the phosphorylation of histone H2AX (γ-H2AX) were observed. Our data suggest that ACH may induce oxidative stress and inflammation on alveolar cells, and A549 cells may be useful to identify cellular and molecular events that may be associated with adverse effects on the lungs. Still, further research is needed to ensure the inhalation safety of ACH.
Collapse
Affiliation(s)
- Emanoela Lundgren Thá
- Graduate Program in Genetics, Department of Genetics-Federal University of Paraná (UFPR), Curitiba, Brazil
| | | | | | | | - Carla Abdo Brohem
- Product Safety Management-Q&PP, Grupo Boticário, São José dos Pinhais, Brazil
| | | | | | - Karin Braun Prado
- Department of Genetics, Federal University of Paraná (UFPR), Curitiba, Brazil
| | | | - Márcio Lorencini
- Product Safety Management-Q&PP, Grupo Boticário, São José dos Pinhais, Brazil
| | - Daniela Morais Leme
- Department of Genetics, Federal University of Paraná (UFPR), Curitiba, Brazil
| |
Collapse
|
4
|
Nossa R, Costa J, Cacopardo L, Ahluwalia A. Breathing in vitro: Designs and applications of engineered lung models. J Tissue Eng 2021; 12:20417314211008696. [PMID: 33996022 PMCID: PMC8107677 DOI: 10.1177/20417314211008696] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 03/22/2021] [Indexed: 12/11/2022] Open
Abstract
The aim of this review is to provide a systematic design guideline to users, particularly engineers interested in developing and deploying lung models, and biologists seeking to identify a suitable platform for conducting in vitro experiments involving pulmonary cells or tissues. We first discuss the state of the art on lung in vitro models, describing the most simplistic and traditional ones. Then, we analyze in further detail the more complex dynamic engineered systems that either provide mechanical cues, or allow for more predictive exposure studies, or in some cases even both. This is followed by a dedicated section on microchips of the lung. Lastly, we present a critical discussion of the different characteristics of each type of system and the criteria which may help researchers select the most appropriate technology according to their specific requirements. Readers are encouraged to refer to the tables accompanying the different sections where comprehensive and quantitative information on the operating parameters and performance of the different systems reported in the literature is provided.
Collapse
|
5
|
Keyser BM, Leverette R, Hollings M, Seymour A, Reeve L, Fields W. Investigation of multiple whole smoke dosimetry techniques using a VITROCELL®VC10® smoke exposure system. Toxicol Rep 2019; 6:1281-1288. [PMID: 31828014 PMCID: PMC6889780 DOI: 10.1016/j.toxrep.2019.10.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 10/08/2019] [Accepted: 10/10/2019] [Indexed: 10/31/2022] Open
Abstract
The Vitrocell® VC10® smoke exposure system offers multiple platforms for air liquid interface (ALI) and air agar interface (AAI) exposure that mimic in vivo conditions for assessing toxicological impact of whole smoke using in vitro assays. The aim of this study was to investigate and compare multiple dosimetry techniques that may be employed during combustible cigarette whole smoke exposure using the Vitrocell® VC10® smoking robot. The following techniques were assessed: (1) quartz crystal microbalances (QCMs), (2) aerosol photometers (using area under curve, AUC), and (3) fluorescence of anhydrous dimethyl sulfoxide (DMSO)-captured smoke constituents. Results showed that each of the dosimetry techniques was able to distinguish different levels of whole smoke airflow in a concentration-related manner. When compared to each other, the three techniques showed a high level of consistency and all were considered efficient tools in quantifying dose during an exposure, although higher variation was observed at the higher airflows tested. Overall, the dosimetry tools investigated here provide effective measures of the whole smoke concentrations tested during the exposure.
Collapse
Affiliation(s)
- Brian M. Keyser
- RAI Services Company, Scientific & Regulatory Affairs, 401 North Main Street, Winston-Salem, NC, 27101, USA1
| | - Robert Leverette
- RAI Services Company, Scientific & Regulatory Affairs, 401 North Main Street, Winston-Salem, NC, 27101, USA1
| | | | | | | | - Wanda Fields
- RAI Services Company, Scientific & Regulatory Affairs, 401 North Main Street, Winston-Salem, NC, 27101, USA1
| |
Collapse
|
6
|
Keyser BM, Leverette R, Fowler K, Fields W, Hargreaves V, Reeve L, Bombick B. Development of a quantitative method for assessment of dose in in vitro evaluations using a VITROCELL® VC10® smoke exposure system. Toxicol In Vitro 2019; 56:19-29. [DOI: 10.1016/j.tiv.2018.12.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 12/12/2018] [Accepted: 12/17/2018] [Indexed: 01/05/2023]
|
7
|
Vitoux MA, Kessal K, Baudouin C, Laprévote O, Melik Parsadaniantz S, Achard S, Brignole-Baudouin F. Formaldehyde Gas Exposure Increases Inflammation in an In Vitro Model of Dry Eye. Toxicol Sci 2018; 165:108-117. [DOI: 10.1093/toxsci/kfy125] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- Michael-Adrien Vitoux
- Institut de la Vision, CNRS UMR 7210, INSERM UMRS 968, Université Pierre et Marie Curie UM80, Paris 75012, France
| | - Karima Kessal
- Institut de la Vision, CNRS UMR 7210, INSERM UMRS 968, Université Pierre et Marie Curie UM80, Paris 75012, France
| | - Christophe Baudouin
- Institut de la Vision, CNRS UMR 7210, INSERM UMRS 968, Université Pierre et Marie Curie UM80, Paris 75012, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, Paris 75012, France
- Hôpital Ambroise Paré, APHP, Université Versailles Saint-Quentin-en-Yvelines, Boulogne-Billancourt 92100, France
| | - Olivier Laprévote
- Laboratoire de Chimie - Toxicologie Analytique et Cellulaire, UMR8638, Faculté de Pharmacie de Paris, Université Paris Descartes, Sorbonne Paris Cité, Paris 75006, France
| | - Stéphane Melik Parsadaniantz
- Institut de la Vision, CNRS UMR 7210, INSERM UMRS 968, Université Pierre et Marie Curie UM80, Paris 75012, France
| | - Sophie Achard
- Laboratoire de Santé Publique et Environnement, EA 4064, Faculté de Pharmacie de Paris, Université Paris Descartes, Sorbonne Paris Cité, Paris 75006, France
| | - Françoise Brignole-Baudouin
- Institut de la Vision, CNRS UMR 7210, INSERM UMRS 968, Université Pierre et Marie Curie UM80, Paris 75012, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, Paris 75012, France
- Laboratoire de Chimie - Toxicologie Analytique et Cellulaire, UMR8638, Faculté de Pharmacie de Paris, Université Paris Descartes, Sorbonne Paris Cité, Paris 75006, France
| |
Collapse
|
8
|
Fowler K, Fields W, Hargreaves V, Reeve L, Bombick B. Development, qualification, validation and application of the Ames test using a VITROCELL ® VC10 ® smoke exposure system. Toxicol Rep 2018; 5:542-551. [PMID: 29854624 PMCID: PMC5977537 DOI: 10.1016/j.toxrep.2018.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 03/09/2018] [Accepted: 04/06/2018] [Indexed: 01/08/2023] Open
Abstract
Smoke-induced mutagenicity at air agar interface was developed and validated. The VITROCELL® VC10® system was validated by equipment qualification protocols. Differentiation of mutagenicity by 3R4F and Eclipse cigarettes was demonstrated.
The Ames test has established use in the assessment of potential mutagenicity of tobacco products but has generally been performed using partitioned exposures (e.g. total particulate matter [TPM], gas vapor phase [GVP]) rather than whole smoke (WS). The VITROCELL®VC10® smoke exposure system offers multiple platforms for air liquid interface (ALI), or air agar interface (AAI) in the case of the Ames test exposure to mimic in vivo-like conditions for assessing the toxicological impact of fresh WS in in vitro assays. The goals of this study were to 1) qualify the VITROCELL®VC10® to demonstrate functionality of the system, 2) develop and validate the Ames test following WS exposure with the VITROCELL®VC10® and 3) assess the ability of the Ames test to differentiate between a reference combustible product (3R4F Kentucky reference cigarette) and a primarily tobacco heating product (Eclipse). Based on critical function assessments, the VITROCELL®VC10® was demonstrated to be fit for the purpose of consistent generation of WS. Assay validation was conducted for 5 bacterial strains (TA97, TA98, TA100, TA1535 and TA102) and reproducible exposure–related changes in revertants were observed for TA98 and TA100 in the presence of rat liver S-9 following exposure to 3R4F WS. In the comparative studies, exposure-related changes in in vitro mutagenicity following exposure of TA98 and TA100 in the presence of S9 to both 3R4F and Eclipse WS were observed, with the response for Eclipse being significantly less than that for 3R4F (p < 0.001) which is consistent with the fewer chemical constituents liberated by primarily-heating the product.
Collapse
Affiliation(s)
- Kathy Fowler
- RAI Services Company, Scientific & Regulatory Affairs, 401 North Main Street, Winston-Salem, NC 27101, USA
| | - Wanda Fields
- RAI Services Company, Scientific & Regulatory Affairs, 401 North Main Street, Winston-Salem, NC 27101, USA
| | | | | | - Betsy Bombick
- RAI Services Company, Scientific & Regulatory Affairs, 401 North Main Street, Winston-Salem, NC 27101, USA
| |
Collapse
|
9
|
Zavala J, Greenan R, Krantz QT, DeMarini DM, Higuchi M, Gilmour MI, White PA. Regulating temperature and relative humidity in air-liquid interface in vitro systems eliminates cytotoxicity resulting from control air exposures. Toxicol Res (Camb) 2017; 6:448-459. [PMID: 30090513 DOI: 10.1039/c7tx00109f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 05/22/2017] [Indexed: 12/17/2022] Open
Abstract
VITROCELL® systems permit cell exposures at the air-liquid interface (ALI); however, there are inconsistent methodologies in the literature for their operation. Some studies find that exposure to air (vehicle control) induced cytotoxicity relative to incubator controls; others do not mention if any cytotoxicity was encountered. We sought to test whether temperature and relative humidity (temp/RH) influence cytotoxicity with an unmodified (conditions A & B) and modified (condition C) VITROCELL® 6 CF with temp/RH controls to permit conditioning of the sampled air-flow. We exposed BEAS-2B cells for 1 h to air and measured viability (WST-1 cell proliferation assay) and lactate dehydrogenase (LDH) release 6 h post-exposure. Relative to controls, cells exposed to air at (A) 22 °C and 18% RH had a 47.9% ± 3.2% (p < 0.0001) reduction in cell viability and 10.7% ± 2.0% (p < 0.0001) increase in LDH release (B) 22 °C and 55% RH had a 40.3% ± 5.8% (p < 0.0001) reduction in cell viability and 2.6% ± 2.0% (p = 0.2056) increase in LDH release, or (C) 37 °C and >75% RH showed no changes in cell viability and no increase in LDH release. Furthermore, cells exposed to air at 37 °C and >75% RH 24 h post-exposure showed no changes in viability or LDH release relative to incubator controls. Thus, reductions in cell viability were induced under conditions used typically in the literature (conditions A & B). However, our modifications (condition C) overcome this shortcoming by preventing cell desiccation; regulating temp/RH is essential for conducting adequate ALI exposures.
Collapse
Affiliation(s)
- Jose Zavala
- NHEERL , U.S. Environmental Protection Agency , Research Triangle Park , NC 27711 , USA . ; Tel: +1-919-541-2316
| | - Rebecca Greenan
- Mechanistic Studies Division , Environmental Health Science and Research Bureau , Health Canada , Ottawa , Ontario K1A 0K9 , Canada . ; ; Tel: +1-613-941-7373
| | - Q Todd Krantz
- NHEERL , U.S. Environmental Protection Agency , Research Triangle Park , NC 27711 , USA . ; Tel: +1-919-541-2316
| | - David M DeMarini
- NHEERL , U.S. Environmental Protection Agency , Research Triangle Park , NC 27711 , USA . ; Tel: +1-919-541-2316
| | - Mark Higuchi
- NHEERL , U.S. Environmental Protection Agency , Research Triangle Park , NC 27711 , USA . ; Tel: +1-919-541-2316
| | - M Ian Gilmour
- NHEERL , U.S. Environmental Protection Agency , Research Triangle Park , NC 27711 , USA . ; Tel: +1-919-541-2316
| | - Paul A White
- Mechanistic Studies Division , Environmental Health Science and Research Bureau , Health Canada , Ottawa , Ontario K1A 0K9 , Canada . ; ; Tel: +1-613-941-7373
| |
Collapse
|
10
|
Fields W, Fowler K, Hargreaves V, Reeve L, Bombick B. Development, qualification, validation and application of the neutral red uptake assay in Chinese Hamster Ovary (CHO) cells using a VITROCELL® VC10® smoke exposure system. Toxicol In Vitro 2017; 40:144-152. [PMID: 28062357 DOI: 10.1016/j.tiv.2017.01.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 12/09/2016] [Accepted: 01/02/2017] [Indexed: 01/29/2023]
Abstract
Cytotoxicity assessment of combustible tobacco products by neutral red uptake (NRU) has historically used total particulate matter (TPM) or solvent captured gas vapor phase (GVP), rather than fresh whole smoke. Here, the development, validation and application of the NRU assay in Chinese Hamster Ovary (CHO) cells, following exposure to fresh whole smoke generated with the VITROCELL® VC10® system is described. Whole smoke exposure is particularly important as both particulate and vapor phases of tobacco smoke show cytotoxicity in vitro. The VITROCELL® VC10® system provides exposure at the air liquid interface (ALI) to mimic in vivo conditions for assessing the toxicological impact of smoke in vitro. Instrument and assay validations are crucial for comparative analyses. GOALS OF THIS STUDY 1) demonstrate functionality of the VITROCELL® VC10® system by installation, operational and performance qualification, 2) develop and validate a cellular system for assessing cytotoxicity following whole smoke exposure and 3) assess the whole smoke NRU assay sensitivity for statistical differentiation between a reference combustible cigarette (3R4F) and a primarily "heat-not-burn" cigarette (Eclipse). RESULTS The VITROCELL® VC10® provided consistent generation and delivery of whole smoke; exposure-related changes in in vitro cytotoxicity were observed with reproducible IC50 values; comparative analysis showed that the heat-not-burn cigarette was significantly (P<0.001) less cytotoxic than the 3R4F combustible cigarette, consistent with the lower levels of chemical constituents liberated by primarily-heating the cigarette versus burning.
Collapse
Affiliation(s)
- Wanda Fields
- RAI Services Company, Scientific & Regulatory Affairs, 401 North Main Street, Winston-Salem, NC 27101, USA.
| | - Kathy Fowler
- RAI Services Company, Scientific & Regulatory Affairs, 401 North Main Street, Winston-Salem, NC 27101, USA
| | - Victoria Hargreaves
- Covance Laboratories Ltd., Otley Road, Harrogate, North Yorkshire HG1 3PY, UK
| | - Lesley Reeve
- Covance Laboratories Ltd., Otley Road, Harrogate, North Yorkshire HG1 3PY, UK
| | - Betsy Bombick
- RAI Services Company, Scientific & Regulatory Affairs, 401 North Main Street, Winston-Salem, NC 27101, USA
| |
Collapse
|
11
|
Polk WW, Sharma M, Sayes CM, Hotchkiss JA, Clippinger AJ. Aerosol generation and characterization of multi-walled carbon nanotubes exposed to cells cultured at the air-liquid interface. Part Fibre Toxicol 2016; 13:20. [PMID: 27108236 PMCID: PMC4842292 DOI: 10.1186/s12989-016-0131-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 04/14/2016] [Indexed: 12/20/2022] Open
Abstract
Aerosol generation and characterization are critical components in the assessment of the inhalation hazards of engineered nanomaterials (NMs). An extensive review was conducted on aerosol generation and exposure apparatus as part of an international expert workshop convened to discuss the design of an in vitro testing strategy to assess pulmonary toxicity following exposure to aerosolized particles. More specifically, this workshop focused on the design of an in vitro method to predict the development of pulmonary fibrosis in humans following exposure to multi-walled carbon nanotubes (MWCNTs). Aerosol generators, for dry or liquid particle suspension aerosolization, and exposure chambers, including both commercially available systems and those developed by independent researchers, were evaluated. Additionally, characterization methods that can be used and the time points at which characterization can be conducted in order to interpret in vitro exposure results were assessed. Summarized below is the information presented and discussed regarding the relevance of various aerosol generation and characterization techniques specific to aerosolized MWCNTs exposed to cells cultured at the air-liquid interface (ALI). The generation of MWCNT aerosols relevant to human exposures and their characterization throughout exposure in an ALI system is critical for extrapolation of in vitro results to toxicological outcomes in humans.
Collapse
Affiliation(s)
- William W Polk
- Integrated Laboratory Systems, Inc, Contractor Supporting the National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods, Research Triangle Park, NC, USA
| | - Monita Sharma
- PETA International Science Consortium Ltd, London, UK
| | - Christie M Sayes
- Department of Environmental Science, Baylor University, Waco, TX, USA
| | | | | |
Collapse
|
12
|
In vitro assays as a tool for determination of VOCs toxic effect on respiratory system: A critical review. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.10.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
13
|
Svensson CR, Ameer SS, Ludvigsson L, Ali N, Alhamdow A, Messing ME, Pagels J, Gudmundsson A, Bohgard M, Sanfins E, Kåredal M, Broberg K, Rissler J. Validation of an air-liquid interface toxicological set-up using Cu, Pd, and Ag well-characterized nanostructured aggregates and spheres. JOURNAL OF NANOPARTICLE RESEARCH : AN INTERDISCIPLINARY FORUM FOR NANOSCALE SCIENCE AND TECHNOLOGY 2016; 18:86. [PMID: 27069401 PMCID: PMC4805710 DOI: 10.1007/s11051-016-3389-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 03/03/2016] [Indexed: 05/22/2023]
Abstract
ABSTRACT Systems for studying the toxicity of metal aggregates on the airways are normally not suited for evaluating the effects of individual particle characteristics. This study validates a set-up for toxicological studies of metal aggregates using an air-liquid interface approach. The set-up used a spark discharge generator capable of generating aerosol metal aggregate particles and sintered near spheres. The set-up also contained an exposure chamber, The Nano Aerosol Chamber for In Vitro Toxicity (NACIVT). The system facilitates online characterization capabilities of mass mobility, mass concentration, and number size distribution to determine the exposure. By dilution, the desired exposure level was controlled. Primary and cancerous airway cells were exposed to copper (Cu), palladium (Pd), and silver (Ag) aggregates, 50-150 nm in median diameter. The aggregates were composed of primary particles <10 nm in diameter. For Cu and Pd, an exposure of sintered aerosol particles was also produced. The doses of the particles were expressed as particle numbers, masses, and surface areas. For the Cu, Pd, and Ag aerosol particles, a range of mass surface concentrations on the air-liquid interface of 0.4-10.7, 0.9-46.6, and 0.1-1.4 µg/cm2, respectively, were achieved. Viability was measured by WST-1 assay, cytokines (Il-6, Il-8, TNF-a, MCP) by Luminex technology. Statistically significant effects and dose response on cytokine expression were observed for SAEC cells after exposure to Cu, Pd, or Ag particles. Also, a positive dose response was observed for SAEC viability after Cu exposure. For A549 cells, statistically significant effects on viability were observed after exposure to Cu and Pd particles. The set-up produced a stable flow of aerosol particles with an exposure and dose expressed in terms of number, mass, and surface area. Exposure-related effects on the airway cellular models could be asserted.
Collapse
Affiliation(s)
- C. R. Svensson
- />Department of Design Sciences, Ergonomics and Aerosol Technology, Lund University, 221 00 Lund, Sweden
| | - S. S. Ameer
- />Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 00 Lund, Sweden
| | - L. Ludvigsson
- />Department of Physics, Solid State Physics, Lund University, 221 00 Lund, Sweden
| | - N. Ali
- />Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 00 Lund, Sweden
| | - A. Alhamdow
- />Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 00 Lund, Sweden
- />Institute of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - M. E. Messing
- />Department of Physics, Solid State Physics, Lund University, 221 00 Lund, Sweden
| | - J. Pagels
- />Department of Design Sciences, Ergonomics and Aerosol Technology, Lund University, 221 00 Lund, Sweden
| | - A. Gudmundsson
- />Department of Design Sciences, Ergonomics and Aerosol Technology, Lund University, 221 00 Lund, Sweden
| | - M. Bohgard
- />Department of Design Sciences, Ergonomics and Aerosol Technology, Lund University, 221 00 Lund, Sweden
| | - E. Sanfins
- />Institute of Emerging Diseases and Innovative Therapies (iMETI), Division of Prions and Related Diseases (SEPIA), Atomic Energy Commission (CEA), 18 Route du Panorama, 92265 Fontenay-aux-Roses, France
| | - M. Kåredal
- />Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 00 Lund, Sweden
| | - K. Broberg
- />Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 00 Lund, Sweden
- />Institute of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - J. Rissler
- />Department of Design Sciences, Ergonomics and Aerosol Technology, Lund University, 221 00 Lund, Sweden
- />Chemistry, Materials and Surfaces, SP Technical Research Institute of Sweden, 223 70 Lund, Sweden
| |
Collapse
|
14
|
Bardet G, Mignon V, Momas I, Achard S, Seta N. Human Reconstituted Nasal Epithelium, a promising in vitro model to assess impacts of environmental complex mixtures. Toxicol In Vitro 2015; 32:55-62. [PMID: 26631767 DOI: 10.1016/j.tiv.2015.11.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/26/2015] [Accepted: 11/24/2015] [Indexed: 11/28/2022]
Abstract
Considering the impact of respiratory diseases around the world, appropriate experimental tools to help understand the mechanisms involved in such diseases are becoming essential. Our aim was to investigate the cellular and morphological reactivity of a human Reconstituted Nasal Epithelium (hRNE) to evaluate the impact of environmental complex mixture (ECM), with tobacco smoke as a model, after three weeks of repeated exposures. Staining of hRNE showed a multilayered ciliated epithelium, with a regular cilia beats, and a mucus production. When hRNE was exposed to ECM for 5 min once or twice a week, during 3 weeks, significant changes occurred: IL-8 production significantly increased 24h after the first exposure compared with Air-exposure and only during the first week, without any loss of tissue integrity. Immunostaining of F-actin cytoskeleton showed a modification in cellular morphology (number and diameter). Taken together our results indicate that hRNE is well suited to study the cellular and morphological effects of repeated exposures to an environmental complex mixture. Human reconstituted epithelium models are currently the best in vitro representation of human respiratory tract physiology, and also the most robust for performing repeated exposures to atmospheric pollutants.
Collapse
Affiliation(s)
- Gaëlle Bardet
- Université Paris Descartes, Faculté de Pharmacie de Paris, EA 4064, Laboratoire de Santé Publique et Environnement, Paris, France; Agence de l'environnement et de la Maîtrise de l'Energie (ADEME), Angers, France.
| | - Virginie Mignon
- Université Paris Descartes, Faculté de Pharmacie de Paris, Cellular and Molecular Imaging Platform, UMS 3612 CNRS, US25 INSERM, Paris, France.
| | - Isabelle Momas
- Université Paris Descartes, Faculté de Pharmacie de Paris, EA 4064, Laboratoire de Santé Publique et Environnement, Paris, France.
| | - Sophie Achard
- Université Paris Descartes, Faculté de Pharmacie de Paris, EA 4064, Laboratoire de Santé Publique et Environnement, Paris, France.
| | - Nathalie Seta
- Université Paris Descartes, Faculté de Pharmacie de Paris, EA 4064, Laboratoire de Santé Publique et Environnement, Paris, France; AP-HP, Hôpital Bichat, Biochimie, Paris, France.
| |
Collapse
|
15
|
Breheny D, Cunningham F, Kilford J, Payne R, Dillon D, Meredith C. Application of a modified gaseous exposure system to the in vitro toxicological assessment of tobacco smoke toxicants. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2014; 55:662-72. [PMID: 24889675 PMCID: PMC6710645 DOI: 10.1002/em.21876] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 05/05/2014] [Accepted: 05/12/2014] [Indexed: 06/03/2023]
Abstract
Tobacco smoke is a complex mixture of over 6,000 individual chemical constituents. Approximately 150 of these have been identified as 'tobacco smoke toxicants' due to their known toxicological effects. A number of these toxicants are present in the gaseous phase of tobacco smoke. This presents a technical challenge when assessing the toxicological effects of these chemicals in vitro. We have adapted a commercially available tobacco smoke exposure system to enable the assessment of the contribution of individual smoke toxicants to the overall toxicological effects of whole mainstream cigarette smoke (WS). Here we present a description of the exposure system and the methodology used. We use the example of a gaseous tobacco smoke toxicant, ethylene oxide (EtO), a Group 1 IARC carcinogen and known mutagen, to illustrate how this methodology can be applied to the assessment of genotoxicity of gaseous chemicals in the context of WS. In the present study we found that EtO was positive in Salmonella typhimurium strain YG1042, a strain that is sensitive to tobacco smoke. However, EtO did not increase the mutagenicity of the WS mixture when it was added at greatly higher concentrations than those found typically in WS. The findings presented here demonstrate the suitability of this exposure system for the assessment of the mutagenic potential of gases in vitro. Whilst we have focused on tobacco smoke toxicants, this system has broad application potential in studying the biological effects of exposure to a wide range of gaseous compounds that are present within complex aerosol mixtures.
Collapse
Affiliation(s)
- Damien Breheny
- British American TobaccoGroup R&D, SouthamptonHampshireSO15 8TLUnited Kingdom
| | - Fiona Cunningham
- British American TobaccoGroup R&D, SouthamptonHampshireSO15 8TLUnited Kingdom
| | - Joanne Kilford
- Covance Laboratories LtdOtley Road, HarrogateNorth YorkshireHG3 1PYUnited Kingdom
| | - Rebecca Payne
- Covance Laboratories LtdOtley Road, HarrogateNorth YorkshireHG3 1PYUnited Kingdom
| | - Deborah Dillon
- British American TobaccoGroup R&D, SouthamptonHampshireSO15 8TLUnited Kingdom
| | - Clive Meredith
- British American TobaccoGroup R&D, SouthamptonHampshireSO15 8TLUnited Kingdom
| |
Collapse
|
16
|
Bardet G, Achard S, Loret T, Desauziers V, Momas I, Seta N. A model of human nasal epithelial cells adapted for direct and repeated exposure to airborne pollutants. Toxicol Lett 2014; 229:144-9. [PMID: 24960057 DOI: 10.1016/j.toxlet.2014.05.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 05/04/2014] [Accepted: 05/27/2014] [Indexed: 12/28/2022]
Abstract
Airway epithelium lining the nasal cavity plays a pivotal role in respiratory tract defense and protection mechanisms. Air pollution induces alterations linked to airway diseases such as asthma. Only very few in vitro studies to date have succeeded in reproducing physiological conditions relevant to cellular type and chronic atmospheric pollution exposure. We therefore, set up an in vitro model of human Airway Epithelial Cells of Nasal origin (hAECN) close to real human cell functionality, specifically adapted to study the biological effects of exposure to indoor gaseous pollution at the environmental level. hAECN were exposed under air-liquid interface, one, two, or three-times at 24 h intervals for 1 h, to air or formaldehyde (200 μg/m(3)), an indoor air gaseous pollutant. All experiments were ended at day 4, when both cellular viability and cytokine production were assessed. Optimal adherence and confluence of cells were obtained 96 h after cell seeding onto collagen IV-precoated insert. Direct and repeated exposure to formaldehyde did not produce any cellular damage or IL-6 production change, although weak lower IL-8 production was observed only after the third exposure. Our model is significantly better than previous ones due to cell type and the repeated exposure protocol.
Collapse
Affiliation(s)
- Gaëlle Bardet
- Université Paris Descartes, EA 4064, Laboratoire de Santé Publique et Environnement, 4, Avenue de l'Observatoire, 75006 Paris, France; Agence de l'Environnement et de la Maîtrise de l'Energie, Angers, France.
| | - Sophie Achard
- Université Paris Descartes, EA 4064, Laboratoire de Santé Publique et Environnement, 4, Avenue de l'Observatoire, 75006 Paris, France.
| | - Thomas Loret
- Université Paris Descartes, EA 4064, Laboratoire de Santé Publique et Environnement, 4, Avenue de l'Observatoire, 75006 Paris, France.
| | - Valérie Desauziers
- Centre des Matériaux des Mines d'Alès, Ecole des Mines d'Alès, Pau, France.
| | - Isabelle Momas
- Université Paris Descartes, EA 4064, Laboratoire de Santé Publique et Environnement, 4, Avenue de l'Observatoire, 75006 Paris, France.
| | - Nathalie Seta
- Université Paris Descartes, EA 4064, Laboratoire de Santé Publique et Environnement, 4, Avenue de l'Observatoire, 75006 Paris, France; AP-HP, Hôpital Bichat, Biochimie, Paris, France.
| |
Collapse
|
17
|
Adamson J, Thorne D, Dalrymple A, Dillon D, Meredith C. Assessment of cigarette smoke particle deposition within the Vitrocell® exposure module using quartz crystal microbalances. Chem Cent J 2013; 7:50. [PMID: 23497606 PMCID: PMC3635897 DOI: 10.1186/1752-153x-7-50] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 03/06/2013] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Cigarette smoking is a cause of a variety of serious diseases, and to understand the toxicological impact of tobacco smoke in vitro, whole smoke exposure systems can be used. One of the main challenges of the different whole smoke exposure systems that are commercially available is that they dilute and deliver smoke in different ways, limiting/restricting the cross-comparison of biological responses. This is where dosimetry - dose quantification - can play a key role in data comparison. Quartz crystal microbalance (QCM) technology has been put forward as one such tool to quantify smoke particle deposition in vitro, in real-time. RESULTS Using four identical QCMs, installed into the Vitrocell® mammalian 6/4 CF Stainless exposure module, we were able to quantify deposited smoke particle deposition, generated and diluted by a Vitrocell® VC 10 Smoking Robot. At diluting airflows 0.5-4.0 L/min and vacuum flow rate 5 ml/min/well through the exposure module, mean particle deposition was in the range 8.65 ± 1.51 μg/cm(2)-0.72 ± 0.13 μg/cm(2). Additionally, the effect of varying vacuum flow rate on particle deposition was assessed from 5 ml/min/well - 100 ml/min/well. Mean deposited mass for all four airflows tested per vacuum decreased as vacuum rate was increased: mean deposition was 3.79, 2.75, 1.56 and 1.09 μg/cm(2) at vacuum rates of 5, 10, 50 and 100 ml/min/well respectively. CONCLUSIONS QCMs within the Vitrocell® exposure module have demonstrated applicability at defining particle dose ranges at various experimental conditions. This tool will prove useful for users of the Vitrocell® system for dose-response determination and QC purposes.
Collapse
Affiliation(s)
- Jason Adamson
- British American Tobacco, Group R&D, Southampton, SO15 8TL, UK
| | - David Thorne
- British American Tobacco, Group R&D, Southampton, SO15 8TL, UK
| | | | - Debbie Dillon
- British American Tobacco, Group R&D, Southampton, SO15 8TL, UK
| | - Clive Meredith
- British American Tobacco, Group R&D, Southampton, SO15 8TL, UK
| |
Collapse
|
18
|
Bohrn U, Stütz E, Fleischer M, Schöning MJ, Wagner P. Using a cell-based gas biosensor for investigation of adverse effects of acetone vapors in vitro. Biosens Bioelectron 2013; 40:393-400. [DOI: 10.1016/j.bios.2012.08.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 08/04/2012] [Accepted: 08/13/2012] [Indexed: 02/06/2023]
|
19
|
Chuang HC, Cheng YL, Lei YC, Chang HH, Cheng TJ. Protective effects of pulmonary epithelial lining fluid on oxidative stress and DNA single-strand breaks caused by ultrafine carbon black, ferrous sulphate and organic extract of diesel exhaust particles. Toxicol Appl Pharmacol 2012; 266:329-34. [PMID: 23261976 DOI: 10.1016/j.taap.2012.12.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2012] [Revised: 12/03/2012] [Accepted: 12/06/2012] [Indexed: 11/30/2022]
Abstract
Pulmonary epithelial lining fluid (ELF) is the first substance to make contact with inhaled particulate matter (PM) and interacts chemically with PM components. The objective of this study was to determine the role of ELF in oxidative stress, DNA damage and the production of proinflammatory cytokines following physicochemical exposure to PM. Ultrafine carbon black (ufCB, 15 nm; a model carbonaceous core), ferrous sulphate (FeSO(4); a model transition metal) and a diesel exhaust particle (DEP) extract (a model organic compound) were used to examine the acellular oxidative potential of synthetic ELF and non-ELF systems. We compared the effects of exposure to ufCB, FeSO(4) and DEP extract on human alveolar epithelial Type II (A549) cells to determine the levels of oxidative stress, DNA single-strand breaks and interleukin-8 (IL-8) production in ELF and non-ELF systems. The effects of ufCB and FeSO(4) on the acellular oxidative potential, cellular oxidative stress and DNA single-strand breakage were mitigated significantly by the addition of ELF, whereas there was no decrease following treatment with the DEP extract. There was no significant effect on IL-8 production following exposure to samples that were suspended in ELF/non-ELF systems. The results of the present study indicate that ELF plays an important role in the initial defence against PM in the pulmonary environment. Experimental components, such as ufCB and FeSO(4), induced the production of oxidative stress and led to DNA single-strand breaks, which were moderately prevented by the addition of ELF. These findings suggest that ELF plays a protective role against PM-driven oxidative stress and DNA damage.
Collapse
Affiliation(s)
- Hsiao-Chi Chuang
- School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | | | | | | | | |
Collapse
|
20
|
Kastner PE, Le Calvé S, Zheng W, Casset A, Pons F. A dynamic system for single and repeated exposure of airway epithelial cells to gaseous pollutants. Toxicol In Vitro 2012; 27:632-40. [PMID: 23168489 DOI: 10.1016/j.tiv.2012.11.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 10/31/2012] [Accepted: 11/08/2012] [Indexed: 01/01/2023]
Abstract
In vitro models are promising approaches to investigate the adverse effects and the mode of action of air pollutants on the respiratory tract. We designed a dynamic system that allows the single or repeated exposure of cultured cells to two major indoor air gaseous pollutants, formaldehyde (HCHO) and nitrogen dioxide (NO2), alone or as a mixture. In this system, the Calu-3 human bronchial epithelial cell line was exposed at the air-liquid interface (ALI) or submerged by culture medium to synthetic air or to target concentrations of HCHO and/or NO2 once or on 4 consecutive days before assessment of cell viability and necrosis, IL-6 and IL-8 release and trans-epithelial electrical resistance. Our data showed that whereas the ALI method can be used for single short-term exposures only, the submerged method provides the possibility to expose Calu-3 cells in a repeated manner. As well, we found that repeated exposures of the cells to HCHO and NO2 at concentrations that can be found indoors triggered a significant decrease in cell metabolism and an increase in IL-8 release that were not evoked by a single exposure. Thus, our work highlights the fact that the development of systems and methods that allow repeated exposures of cultured cells to gaseous compounds in mixtures is of major interest to evaluate the impact of air pollution on the respiratory tract.
Collapse
Affiliation(s)
- Pierre Edouard Kastner
- Laboratoire de Conception et Application de Molécules Bioactives (LCAMB), UMR 7199 CNRS - Université de Strasbourg, Faculté de Pharmacie, 74 route du Rhin, BP 60024, 67401 Illkirch Cedex, France
| | | | | | | | | |
Collapse
|
21
|
Persoz C, Achard S, Momas I, Seta N. Inflammatory response modulation of airway epithelial cells exposed to formaldehyde. Toxicol Lett 2012; 211:159-63. [PMID: 22484645 DOI: 10.1016/j.toxlet.2012.03.799] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 03/03/2012] [Accepted: 03/23/2012] [Indexed: 01/02/2023]
Abstract
The two main difficulties when assessing the role and action mechanism of environmental pollutant exposure on the respiratory tract using in vitro methodology are firstly to create exposure conditions that closely mimic the human situation, and secondly to choose an experimental model that accurately represents lung compartment complexity, with different types of cell interaction. The aim of this study was to resolve these two challenges. The first of our difficulties was to find the closest experimental conditions to mimic respiratory environmental pollutant exposure. We compared the effects of formaldehyde (FA) on two cellular models, alveolar and bronchial cell lines, respectively A549 and BEAS-2B. The cells were exposed for 30 min to an environmental dose of gaseous FA (50 μg/m³) at the air-liquid interface. In order to mimic macrophage-epithelial cell cooperation, sensitizations (with TNFα or with conditioned medium from macrophages--CM) prior to gas exposure were applied. After toxicity evaluation, local inflammation was assessed by IL-8 and MCP-1 production 24h after exposure. In our experimental conditions FA had no effects on alveolar and bronchial epithelial cells without any sensitization. FA exposure after TNFα sensitization alone induced a moderate increase of IL-8 by A549 cells. After sensitization with CM, FA exposure induced a strong increase of IL-8 production by A549 cells in comparison to air, whereas a decrease of MCP-1 production was observed on BEAS-2B cells. It appears that the response of alveolar and bronchial epithelial cells to FA was moderate and that complex sensitization refines the inflammatory response to environmental stresses. When sensitized with CM, these cell lines responded differently to FA exposure. Finally by interacting with the respiratory epithelium, FA could exacerbate the inflammation of airways that occurs in severe asthma, and even synergize the effects of other air pollutants such as allergens. Evaluation of nasal cell inflammatory response could shed further light on the effects of FA on respiratory epithelium.
Collapse
Affiliation(s)
- Charles Persoz
- PRES Sorbonne Paris Cité, Université Paris Descartes, Laboratoire de Santé Publique et Environnement-EA 4064, Paris, France
| | | | | | | |
Collapse
|