1
|
Lv J, Zhang C, Qu G, Pan K, Qin J, Wei K, Liang Y. Modification strategies for semiconductor metal oxide nanomaterials applied to chemiresistive NO x gas sensors: A review. Talanta 2024; 273:125853. [PMID: 38460422 DOI: 10.1016/j.talanta.2024.125853] [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: 07/22/2023] [Revised: 02/14/2024] [Accepted: 02/28/2024] [Indexed: 03/11/2024]
Abstract
Semiconductor metal oxides (SMOs) nanomaterials are a category of sensing materials that are widely applied to chemiresistive NOx gas sensors. However, there is much space to improve the sensing performance of SMOs nanomaterials. Therefore, how to improve the sensing performance of SMOs nanomaterials for NOx gases has always attracted the interest of researchers. Up to now, there are few reviews focus on the modification strategies of SMOs which applied to NOx gas sensors. In order to compensate for the limitation, this review summarizes the existing modification strategies of SMOs, hoping to provide researchers a view of the research progress in this filed as comprehensive as possible. This review focuses on the progress of the modification of SMOs nanomaterials for chemiresistive NOx (NO, NO2) gas sensors, including the morphology modulation of SMOs, compositing SMOs, loading noble metals, doping metal ions, compositing with carbon nanomaterials, compositing with biomass template, and compositing with MXene, MOFs, conducting polymers. The mechanism of each strategy to enhance the NOx sensing performance of SMOs-based nanomaterials is also discussed and summarized. In addition, the limitations of some of the modification strategies and ways to address them are discussed. Finally, future perspectives for SMOs-based NOx gas sensors are also discussed.
Collapse
Affiliation(s)
- Jiaxin Lv
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Yunnan, 650500, China
| | - Chaoneng Zhang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Yunnan, 650500, China
| | - Guangfei Qu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Yunnan, 650500, China.
| | - Keheng Pan
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Yunnan, 650500, China
| | - Jin Qin
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Yunnan, 650500, China
| | - Kunling Wei
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Yunnan, 650500, China
| | - Yuqi Liang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Yunnan, 650500, China; National Regional Engineering Research Center-NCW, Yunnan, 650500, China
| |
Collapse
|
2
|
Ling X. The effect of ambient air pollution on birth outcomes in Norway. BMC Public Health 2023; 23:2248. [PMID: 37964290 PMCID: PMC10647155 DOI: 10.1186/s12889-023-16957-1] [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: 04/11/2023] [Accepted: 10/11/2023] [Indexed: 11/16/2023] Open
Abstract
BACKGROUND Ambient air pollution can be harmful to the fetus even in countries with relatively low levels of pollution. Most of the established literature estimates the association between air pollution and health rather than causality. In this paper, I examine the causal effects of ambient air pollution on birth outcomes in Norway. METHODS With the large sample size and geographic division of sub-postal codes in Norway, I can control for a rich set of spatio-temporal fixed effects to overcome most of the endogeneity problems caused by the choice of residential area and date of delivery. After controlling for a rich set of spatio-temporal fixed effects, my paper uses the variance in ambient air pollutant concentrations over narrow time intervals and in a small geographic area of Norway to determine how prenatal air pollution exposure affects birth outcomes. My data contain extensive information about parents as well as meteorological conditions that can be used to control for potential confounding factors. RESULTS I find that prenatal exposure to ambient nitric oxide in the last trimester causes significant birth weight and birth length loss under the same sub-postcode fixed effects and calendar month fixed effects, whereas other ambient air pollutants such as nitrogen dioxide and sulfur dioxide appear to be at safe levels for the fetus in Norway. In addition, the marginal adverse effect of ambient nitric oxide is larger for newborns with disadvantaged parents. Both average concentrations of nitric oxide and occasional high concentration events can adversely affect birth outcomes. CONCLUSIONS Prenatal exposure to NO pollution has an adverse effect on birth outcomes. This suggests that government and researchers should pay more attention to examining NO pollution and that health care providers need to advise pregnant women about the risks of air pollution during pregnancy.
Collapse
Affiliation(s)
- Xiaoguang Ling
- Department of Economics, University of Oslo, Oslo, Norway.
| |
Collapse
|
3
|
Collins A, Møller P, Gajski G, Vodenková S, Abdulwahed A, Anderson D, Bankoglu EE, Bonassi S, Boutet-Robinet E, Brunborg G, Chao C, Cooke MS, Costa C, Costa S, Dhawan A, de Lapuente J, Bo' CD, Dubus J, Dusinska M, Duthie SJ, Yamani NE, Engelward B, Gaivão I, Giovannelli L, Godschalk R, Guilherme S, Gutzkow KB, Habas K, Hernández A, Herrero O, Isidori M, Jha AN, Knasmüller S, Kooter IM, Koppen G, Kruszewski M, Ladeira C, Laffon B, Larramendy M, Hégarat LL, Lewies A, Lewinska A, Liwszyc GE, de Cerain AL, Manjanatha M, Marcos R, Milić M, de Andrade VM, Moretti M, Muruzabal D, Novak M, Oliveira R, Olsen AK, Owiti N, Pacheco M, Pandey AK, Pfuhler S, Pourrut B, Reisinger K, Rojas E, Rundén-Pran E, Sanz-Serrano J, Shaposhnikov S, Sipinen V, Smeets K, Stopper H, Teixeira JP, Valdiglesias V, Valverde M, van Acker F, van Schooten FJ, Vasquez M, Wentzel JF, Wnuk M, Wouters A, Žegura B, Zikmund T, Langie SAS, Azqueta A. Measuring DNA modifications with the comet assay: a compendium of protocols. Nat Protoc 2023; 18:929-989. [PMID: 36707722 PMCID: PMC10281087 DOI: 10.1038/s41596-022-00754-y] [Citation(s) in RCA: 106] [Impact Index Per Article: 106.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 07/05/2022] [Indexed: 01/28/2023]
Abstract
The comet assay is a versatile method to detect nuclear DNA damage in individual eukaryotic cells, from yeast to human. The types of damage detected encompass DNA strand breaks and alkali-labile sites (e.g., apurinic/apyrimidinic sites), alkylated and oxidized nucleobases, DNA-DNA crosslinks, UV-induced cyclobutane pyrimidine dimers and some chemically induced DNA adducts. Depending on the specimen type, there are important modifications to the comet assay protocol to avoid the formation of additional DNA damage during the processing of samples and to ensure sufficient sensitivity to detect differences in damage levels between sample groups. Various applications of the comet assay have been validated by research groups in academia, industry and regulatory agencies, and its strengths are highlighted by the adoption of the comet assay as an in vivo test for genotoxicity in animal organs by the Organisation for Economic Co-operation and Development. The present document includes a series of consensus protocols that describe the application of the comet assay to a wide variety of cell types, species and types of DNA damage, thereby demonstrating its versatility.
Collapse
Affiliation(s)
- Andrew Collins
- Department of Nutrition, University of Oslo, Oslo, Norway
| | - Peter Møller
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Copenhagen, Denmark
| | - Goran Gajski
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Soňa Vodenková
- Department of Molecular Biology of Cancer, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
- Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
| | - Abdulhadi Abdulwahed
- Oxidative Stress Group, Department of Environmental Health Sciences, Florida International University, Miami, FL, USA
| | - Diana Anderson
- Biomedical Sciences Department, University of Bradford, Bradford, UK
| | - Ezgi Eyluel Bankoglu
- Institute of Pharmacology and Toxicology, University of Würzburg, Würzburg, Germany
| | - Stefano Bonassi
- Department of Human Sciences and Quality of Life Promotion, San Raffaele University, Rome, Italy
- Unit of Clinical and Molecular Epidemiology, IRCCS San Raffaele Roma, Rome, Italy
| | - Elisa Boutet-Robinet
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRAE, ENVT, INP-Purpan, UPS, Toulouse, France
| | - Gunnar Brunborg
- Division of Climate and Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
- Centre for Environmental Radioactivity (CoE CERAD 223268/50), Oslo, Norway
| | - Christy Chao
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Marcus S Cooke
- Oxidative Stress Group, Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Carla Costa
- Environmental Health Department, National Institute of Health, Porto, Portugal
- EPIUnit - Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal
- Laboratory for Integrative and Translational Research in Population Health (ITR), Porto, Portugal
| | - Solange Costa
- Environmental Health Department, National Institute of Health, Porto, Portugal
- EPIUnit - Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal
- Laboratory for Integrative and Translational Research in Population Health (ITR), Porto, Portugal
| | - Alok Dhawan
- Centre of BioMedical Research, SGPGIMS Campus, Lucknow, India
| | - Joaquin de Lapuente
- Toxicology Department, AC MARCA Group, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Cristian Del Bo'
- Department of Food, Environmental and Nutritional Sciences, Università degli Studi di Milano, Milan, Italy
| | - Julien Dubus
- Aix-Marseille University, CEA, CNRS, Institute of Biosciences and Biotechnologies of Aix-Marseille, Saint-Paul-Lez-Durance, France
| | - Maria Dusinska
- Health Effects Laboratory, Department of Environmental Chemistry, NILU-Norwegian Institute for Air Research, Kjeller, Norway
| | - Susan J Duthie
- School of Pharmacy and Life Sciences, The Robert Gordon University, Aberdeen, Scotland
| | - Naouale El Yamani
- Health Effects Laboratory, Department of Environmental Chemistry, NILU-Norwegian Institute for Air Research, Kjeller, Norway
| | - Bevin Engelward
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Isabel Gaivão
- Genetics and Biotechnology Department and Veterinary and Animal Research Centre (CECAV), Universidade de Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Lisa Giovannelli
- Department NEUROFARBA, Section Pharmacology and Toxicology, University of Florence, Florence, Italy
| | - Roger Godschalk
- Department of Pharmacology & Toxicology, School for Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands
| | - Sofia Guilherme
- Centre for Environmental and Marine Studies (CESAM) and Department of Biology, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Kristine B Gutzkow
- Division of Climate and Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
- Centre for Environmental Radioactivity (CoE CERAD 223268/50), Oslo, Norway
| | - Khaled Habas
- School of Chemistry and Bioscience, Faculty of Life Sciences, Bradford University, Bradford, UK
| | - Alba Hernández
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Cerdanyola de Vallès, Spain
| | - Oscar Herrero
- Biology and Environmental Toxicology Group, Faculty of Science, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain
| | - Marina Isidori
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Caserta, Italy
| | - Awadhesh N Jha
- School of Biological and Marine Sciences, University of Plymouth, Plymouth, UK
| | - Siegfried Knasmüller
- Institute of Cancer Research, Internal Medicine I, Medical University Vienna, Vienna, Austria
| | - Ingeborg M Kooter
- Department Circular Economy and Environment, the Netherlands Organisation for Applied Scientific Research-TNO, Utrecht, The Netherlands
| | | | - Marcin Kruszewski
- Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Warsaw, Poland
- Department of Molecular Biology and Translational Research, Institute of Rural Health, Lublin, Poland
| | - Carina Ladeira
- H&TRC-Health & Technology Research Center, ESTeSL-Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, Lisbon, Portugal
- NOVA National School of Public Health, Public Health Research Centre, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - Blanca Laffon
- Universidade da Coruña, Grupo DICOMOSA, CICA - Centro Interdisciplinar de Química e Bioloxía, Departamento de Psicología, Facultad de Ciencias de la Educación, A Coruña, Spain
- Instituto de Investigación Biomédica de A Coruña (INIBIC), A Coruña, Spain
| | - Marcelo Larramendy
- Laboratory of Ecotoxicology, Faculty of Natural Sciences and Museum, National University of La Plata, La Plata, Argentina
| | - Ludovic Le Hégarat
- Anses, French Agency for Food, Environmental and Occupational Health and Safety, Fougeres Laboratory, Toxicology of Contaminants Unit, Fougères, France
| | - Angélique Lewies
- Department of Cardiothoracic Surgery, University of the Free State, Bloemfontein, South Africa
| | - Anna Lewinska
- Department of Biotechnology, University of Rzeszow, Rzeszow, Poland
| | - Guillermo E Liwszyc
- Laboratory of Ecotoxicology, Faculty of Natural Sciences and Museum, National University of La Plata, La Plata, Argentina
| | - Adela López de Cerain
- Department of Pharmacology and Toxicology, University of Navarra, Pamplona, Spain
- IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | - Mugimane Manjanatha
- Food and Drug Administration, National Center for Toxicological Research, Division of Genetic and Molecular Toxicology, Jefferson, AR, USA
| | - Ricard Marcos
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Cerdanyola de Vallès, Spain
| | - Mirta Milić
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Vanessa Moraes de Andrade
- Translational Biomedicine Laboratory, Graduate Program of Health Sciences, University of Southern Santa Catarina, Criciuma, Brazil
| | - Massimo Moretti
- Department of Pharmaceutical Sciences, Unit of Public Health, University of Perugia, Perugia, Italy
| | - Damian Muruzabal
- Department of Pharmacology and Toxicology, University of Navarra, Pamplona, Spain
| | - Matjaž Novak
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Rui Oliveira
- Department of Biology, CBMA-Centre of Molecular and Environmental Biology, University of Minho, Braga, Portugal
| | - Ann-Karin Olsen
- Division of Climate and Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
- Centre for Environmental Radioactivity (CoE CERAD 223268/50), Oslo, Norway
| | - Norah Owiti
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Mário Pacheco
- Centre for Environmental and Marine Studies (CESAM) and Department of Biology, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Alok K Pandey
- Nanomaterial Toxicology Group, CSIR-Indian Institute of Toxicology Research, Lucknow, India
| | - Stefan Pfuhler
- Global Product Stewardship - Human Safety, The Procter & Gamble Co, Cincinnati, OH, USA
| | - Bertrand Pourrut
- Laboratoire Ecologie fonctionnelle et Environnement, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | | | - Emilio Rojas
- Department of Genomic Medicine and Environmental Toxicology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, CU, Mexico City, Mexico
| | - Elise Rundén-Pran
- Health Effects Laboratory, Department of Environmental Chemistry, NILU-Norwegian Institute for Air Research, Kjeller, Norway
| | - Julen Sanz-Serrano
- Department of Pharmacology and Toxicology, University of Navarra, Pamplona, Spain
| | | | - Ville Sipinen
- Norwegian Scientific Committee for Food and Environment, Oslo, Norway
| | - Karen Smeets
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Helga Stopper
- Institute of Pharmacology and Toxicology, University of Würzburg, Würzburg, Germany
| | - João Paulo Teixeira
- Environmental Health Department, National Institute of Health, Porto, Portugal
- EPIUnit - Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal
- Laboratory for Integrative and Translational Research in Population Health (ITR), Porto, Portugal
| | - Vanessa Valdiglesias
- Instituto de Investigación Biomédica de A Coruña (INIBIC), A Coruña, Spain
- Universidade da Coruña, Grupo NanoToxGen, CICA - Centro Interdisciplinar de Química e Bioloxía, Departamento de Biología, Facultad de Ciencias, A Coruña, Spain
| | - Mahara Valverde
- Department of Genomic Medicine and Environmental Toxicology, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, CU, Mexico City, Mexico
| | | | - Frederik-Jan van Schooten
- Department of Pharmacology & Toxicology, School for Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands
| | | | | | - Maciej Wnuk
- Department of Biology, University of Rzeszow, Rzeszow, Poland
| | - Annelies Wouters
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Bojana Žegura
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Tomas Zikmund
- Biocev, 1st Medical Faculty, Charles University, Vestec, Czech Republic
- Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München, Munich, Germany
| | - Sabine A S Langie
- Department of Pharmacology & Toxicology, School for Nutrition and Translational Research in Metabolism (NUTRIM), Maastricht University, Maastricht, The Netherlands
| | - Amaya Azqueta
- Department of Pharmacology and Toxicology, University of Navarra, Pamplona, Spain.
- IdiSNA, Navarra Institute for Health Research, Pamplona, Spain.
| |
Collapse
|
4
|
Elje E, Mariussen E, McFadden E, Dusinska M, Rundén-Pran E. Different Sensitivity of Advanced Bronchial and Alveolar Mono- and Coculture Models for Hazard Assessment of Nanomaterials. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:407. [PMID: 36770370 PMCID: PMC9921680 DOI: 10.3390/nano13030407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/03/2023] [Accepted: 01/13/2023] [Indexed: 06/18/2023]
Abstract
For the next-generation risk assessment (NGRA) of chemicals and nanomaterials, new approach methodologies (NAMs) are needed for hazard assessment in compliance with the 3R's to reduce, replace and refine animal experiments. This study aimed to establish and characterize an advanced respiratory model consisting of human epithelial bronchial BEAS-2B cells cultivated at the air-liquid interface (ALI), both as monocultures and in cocultures with human endothelial EA.hy926 cells. The performance of the bronchial models was compared to a commonly used alveolar model consisting of A549 in monoculture and in coculture with EA.hy926 cells. The cells were exposed at the ALI to nanosilver (NM-300K) in the VITROCELL® Cloud. After 24 h, cellular viability (alamarBlue assay), inflammatory response (enzyme-linked immunosorbent assay), DNA damage (enzyme-modified comet assay), and chromosomal damage (cytokinesis-block micronucleus assay) were measured. Cytotoxicity and genotoxicity induced by NM-300K were dependent on both the cell types and model, where BEAS-2B in monocultures had the highest sensitivity in terms of cell viability and DNA strand breaks. This study indicates that the four ALI lung models have different sensitivities to NM-300K exposure and brings important knowledge for the further development of advanced 3D respiratory in vitro models for the most reliable human hazard assessment based on NAMs.
Collapse
Affiliation(s)
- Elisabeth Elje
- Health Effects Laboratory, Department for Environmental Chemistry, NILU—Norwegian Institute for Air Research, 2007 Kjeller, Norway
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, 0372 Oslo, Norway
| | - Espen Mariussen
- Health Effects Laboratory, Department for Environmental Chemistry, NILU—Norwegian Institute for Air Research, 2007 Kjeller, Norway
- Department of Air Quality and Noise, Norwegian Institute of Public Health, 0456 Oslo, Norway
| | - Erin McFadden
- Health Effects Laboratory, Department for Environmental Chemistry, NILU—Norwegian Institute for Air Research, 2007 Kjeller, Norway
| | - Maria Dusinska
- Health Effects Laboratory, Department for Environmental Chemistry, NILU—Norwegian Institute for Air Research, 2007 Kjeller, Norway
| | - Elise Rundén-Pran
- Health Effects Laboratory, Department for Environmental Chemistry, NILU—Norwegian Institute for Air Research, 2007 Kjeller, Norway
| |
Collapse
|
5
|
Yang L, Yang J, Liu M, Sun X, Li T, Guo Y, Hu K, Bell ML, Cheng Q, Kan H, Liu Y, Gao H, Yao X, Gao Y. Nonlinear effect of air pollution on adult pneumonia hospital visits in the coastal city of Qingdao, China: A time-series analysis. ENVIRONMENTAL RESEARCH 2022; 209:112754. [PMID: 35074347 DOI: 10.1016/j.envres.2022.112754] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 12/31/2021] [Accepted: 01/14/2022] [Indexed: 06/14/2023]
Abstract
Many studies have illustrated adverse effects of short-term exposure to air pollution on human health, which usually assumes a linear exposure-response (E-R) function in the delineation of health effects due to air pollution. However, nonlinearity may exist in the association between air pollutant concentrations and health outcomes such as adult pneumonia hospital visits, and there is a research gap in understanding the nonlinearity. Here, we utilized both the distributed lag model (DLM) and nonlinear model (DLNM) to compare the linear and nonlinear impacts of air pollution on adult pneumonia hospital visits in the coastal city of Qingdao, China. While both models show adverse effects of air pollutants on adult pneumonia hospital visits, the DLNM shows an attenuation of E-R curves at high concentrations. Moreover, the DLNM may reveal delayed health effects that may be missed in the DLM, e.g., ozone exposure and pneumonia hospital visits. With the stratified analysis of air pollutants on adult pneumonia hospital visits, both models consistently reveal that the influence of air pollutants is higher during the cold season than during the warm season. Nevertheless, they may behave differently in terms of other subgroups, such as age, gender and visit types. For instance, while no significant impact due to PM2.5 in any of the subgroups abovementioned emerges based on DLM, the results from DLNM indicate statistically significant impacts for the subgroups of elderly, female and emergency department (ED) visits. With respect to adjustment by two-pollutants, PM10 effect estimates for pneumonia hospital visits were the most robust in both DLM and DLNM, followed by NO2 and SO2 based on the DLNM. Considering the estimated health effects of air pollution relying on the assumed E-R functions, our results demonstrate that the traditional linear association assumptions may overlook some potential health risks.
Collapse
Affiliation(s)
- Lingyue Yang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266100, China
| | - Jiuli Yang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266100, China
| | - Mingyang Liu
- Department of Emergency Internal Medicine, The Affiliated Hospital of Qingdao University, Qingdao, 266100, China
| | - Xiaohui Sun
- Department of Chronic Disease Prevention, Qingdao Municipal Center for Disease Control & Prevention, Qingdao, 266100, China
| | - Tiantian Li
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing,100021, China
| | - Yuming Guo
- Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Vic 3004, Australia
| | - Kejia Hu
- Institute of Big Data in Health Science, School of Public Health, Zhejiang University, Hangzhou, 310058, China
| | - Michelle L Bell
- School of the Environment, Yale University, New Haven, CT, 06511, USA
| | - Qu Cheng
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Haidong Kan
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education, Fudan University, Shanghai, 200433, China
| | - Yang Liu
- Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA, 30322, USA
| | - Huiwang Gao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266100, China
| | - Xiaohong Yao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266100, China
| | - Yang Gao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266100, China.
| |
Collapse
|
6
|
Pal AK, Kumar N, Kshirsagar R. Pulsed-cavity ring down spectroscopic study of NO2 in 501–506 nm spectral region. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2021.111420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
7
|
Shin J, Han S, Noh S, Yu YT, Kim JS. Room-temperature operation of light-assisted NO 2gas sensor based on GaN nanowires and graphene. NANOTECHNOLOGY 2021; 32:505201. [PMID: 34490848 DOI: 10.1088/1361-6528/ac2427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
We report the successful demonstration of a light-assisted NO2gas sensor that operates at room temperature with high response. The gas sensor was fabricated with high-crystalline undoped-GaN nanowires (NWs) and graphene functioning as the light-absorbing medium and carrier channel, respectively. Exposure of the gas sensor to the NO2concentration of 100 ppm at a light intensity of 1 mW cm-2of a xenon lamp delivered a response of 16% at room temperature, which increased to 23% when the light intensity increased to 100 mW cm-2. This value is higher than those previously reported for GaN-based NO2gas sensors operating at room temperature. The room-temperature response of the gas sensor measured after six months was calculated to be 21.9%, which corresponds to 95% compared to the value obtained immediately after fabricating the devices. The response of the gas sensor after independently injecting NO2, H2S, H2, CO, and CH3CHO gases were measured to be 23, 5, 2.6, 2.2, and 1.7%, respectively. These results indicate that the gas sensor using GaN NWs and graphene provides high response, long-term stability, and good selectivity to NO2gas at room temperature. In addition, the use of undoped-GaN NWs without using additional catalysts makes it possible to fabricate gas sensors that operate at room temperature simpler and better than conventional technologies.
Collapse
Affiliation(s)
- Jaehyeok Shin
- Department of Electronic and Information Materials Engineering, Division of Advanced Materials Engineering, and Research Center of Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Sangmoon Han
- Department of Electronic and Information Materials Engineering, Division of Advanced Materials Engineering, and Research Center of Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Siyun Noh
- Department of Electronic and Information Materials Engineering, Division of Advanced Materials Engineering, and Research Center of Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Yeon-Tae Yu
- Department of Electronic and Information Materials Engineering, Division of Advanced Materials Engineering, and Research Center of Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Jin Soo Kim
- Department of Electronic and Information Materials Engineering, Division of Advanced Materials Engineering, and Research Center of Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea
| |
Collapse
|
8
|
Wiest F, Scherzad A, Ickrath P, Poier N, Hackenberg S, Kleinsasser N. [Studies on toxicity and inflammatory reactions induced by e-cigarettes : In vitro exposure of human nasal mucosa cells to propylene glycol at the air-liquid interface]. HNO 2021; 69:952-960. [PMID: 33586050 PMCID: PMC8613128 DOI: 10.1007/s00106-021-00998-2] [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] [Accepted: 12/01/2020] [Indexed: 11/26/2022]
Abstract
Hintergrund Die E‑Zigarette erfreut sich in den letzten Jahren zunehmender Beliebtheit. Die Frage nach der Toxizität ist jedoch noch nicht eindeutig geklärt, und es herrscht global Unsicherheit im Umgang mit der E‑Zigarette. Ziel Ziel der vorliegenden Arbeit war es, Propylenglykol, ein Hauptbestandteil der Liquide, in Bezug auf mögliche akute Entzündungsreaktionen, zyto- und genotoxische Auswirkungen auf humane Nasenschleimhautzellen zu untersuchen. Material und Methoden Die Nasenschleimhautzellen wurden von zehn Probanden im Air-Liquid-Interface kultiviert und anschließend mit unterschiedlichen Konzentrationen des Propylenglykols bedampft. Die Analyse erfolgte mittels Trypanblau-Test, Comet-Assay, Mikrokerntest und IL-6- und IL-8-Sandwich-ELISA. Ergebnis Der Trypanblau-Test zeigte keine Reduktion der Vitalität. Im Sandwich-ELISA konnte kein Anstieg der IL-6- und IL-8-Konzentrationen nachgewiesen werden. Im Comet-Assay zeigte das Olive Tail Moment eine Schädigung im Vergleich zur Negativkontrolle in allen untersuchten Konzentrationen. Zudem zeigte sich eine dosisabhängige Schädigung. Im Mikrokerntest konnte ein Unterschied zwischen dem Reinstoff und der Negativkontrolle gefunden werden. Schlussfolgerung Es zeigten sich möglicherweise reparable DNS-Schädigungen im Comet-Assay. Im Mikrokerntest konnten diese nur in der Reinstoffkonzentration bestätigt werden. Es sollte ein restriktiver Umgang mit der E‑Zigarette erfolgen, bis insbesondere Langzeitstudien vorliegen. Zudem ist eine eindeutige Deklaration der Inhaltsstoffe der Liquide durch die Hersteller zu fordern, um weitergehende Schädigungspotenziale untersuchen zu können.
Collapse
Affiliation(s)
- F Wiest
- Klinik und Poliklinik für Hals‑, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinikum Würzburg, Josef-Schneider-Straße 11, 97080, Würzburg, Deutschland
| | - A Scherzad
- Klinik und Poliklinik für Hals‑, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinikum Würzburg, Josef-Schneider-Straße 11, 97080, Würzburg, Deutschland
| | - P Ickrath
- Klinik und Poliklinik für Hals‑, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinikum Würzburg, Josef-Schneider-Straße 11, 97080, Würzburg, Deutschland
| | - N Poier
- Klinik für Hals‑, Nasen- und Ohrenheilkunde, Kepler Universitätsklinikum Linz, Krankenhausstraße 9, 4021, Linz, Österreich
| | - S Hackenberg
- Klinik und Poliklinik für Hals‑, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinikum Würzburg, Josef-Schneider-Straße 11, 97080, Würzburg, Deutschland
| | - N Kleinsasser
- Klinik und Poliklinik für Hals‑, Nasen- und Ohrenkrankheiten, plastische und ästhetische Operationen, Universitätsklinikum Würzburg, Josef-Schneider-Straße 11, 97080, Würzburg, Deutschland.
| |
Collapse
|
9
|
Zhao S, Liu S, Sun Y, Liu Y, Beazley R, Hou X. Assessing NO 2-related health effects by non-linear and linear methods on a national level. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 744:140909. [PMID: 32702544 DOI: 10.1016/j.scitotenv.2020.140909] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 07/06/2020] [Accepted: 07/10/2020] [Indexed: 05/08/2023]
Abstract
Exposure to NO2 pollution has a significant adverse effect on residents' health. However, few studies have assessed the health effects associated with NO2 pollution. Compared with PM2.5 pollution, the harmfulness of NO2 pollution has not been quantitatively studied or clearly identified. In this study, we assessed the NO2 exposure-related health effects by non-linear and linear methods, taking advantage of online monitoring and survey data. We also assessed the economic cost of NO2 pollution in 338 cities in China. Our results showed that the average annual concentration of NO2 in the top fifteen cities with more than ten million permanent residents (except for Shenzhen, in the Guangdong province) exceeded the annual Grade II standards (40 μg/m3). The estimated national NO2-related all-cause mortality for non-linear and linear methods were 388.5 × 103 (95% CI: 198.1 × 103-748.2 × 103) and 374.1 × 103 (95% CI: 194.3 × 103-695.9 × 103), respectively. The total calculated national economic cost was about 28.8 billion US$ (95% CI: 14.7-55.4) in 2016. In addition, the comparison results showed that the harm caused by PM2.5 pollution was about four times that of NO2 pollution. Our statistics contribute to the limited research on NO2 pollution's effects on health and the economy in China.
Collapse
Affiliation(s)
- Shuang Zhao
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China
| | - Shiliang Liu
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China.
| | - Yongxiu Sun
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China
| | - Yixuan Liu
- School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China
| | - Robert Beazley
- Department of Natural Resources, College of Agriculture and Life Sciences, Fernow Hall 302, Cornell University, Ithaca, NY 14853, USA
| | - Xiaoyun Hou
- School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou 310016, China
| |
Collapse
|
10
|
Ickrath P, Ickrath K, Steinke M, Scherzad A, Kleinsasser N, Lodes N, Bregenzer M, Hagen R, Hackenberg S. DNA Stability, Regeneration Capacity, and Mucociliary Differentiation of Human Nasal Mucosa Cells in Tissue Systems. Tissue Eng Part A 2020; 26:1199-1208. [PMID: 32524916 DOI: 10.1089/ten.tea.2020.0089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
For culture models of primary cells of the human nasal mucosa, monocultures with epithelial cells (ECs) are used as well as cocultures with ECs and fibroblasts (FBs). Well-differentiated models of the respiratory nasal epithelium can be used for ecogenotoxicological assessments, for experiments on host/pathogen interactions, or tissue engineering. However, long-term cultivation and repeated passaging may induce a loss of DNA integrity or cell functionality. The aim of this study was to evaluate these parameters in test systems created from primary nasal mucosa cells. Enzymatic and sequential cell isolation from nasal tissue was performed. EC monocultures and compartment-separated EC-FB cocultures were cultivated over three passages under air/liquid interface conditions. DNA stability and regenerative capacity at the DNA and chromosomal level as well as proliferation and cell differentiation were examined. Both methods showed equivalent levels of DNA stability and regenerative capacity over all passages. Sequential growth of the coculture provided higher cell purity, while enzymatic cell harvest was associated with FB contamination in EC culture. Mucociliary differentiation was verified with electron microscopy in both methods. Functionality measured by lipopolysaccharide stimulation of interleukins was constant over long-term cultivation. Our data confirm DNA stability in long-term cell cultivation as well as functional integrity in both culture methods. Sequential cell isolation should be favored over enzymatic isolation due to higher culture purity. Impact statement Cell culture models are frequently used for ecogenotoxicological assessments, for experiments on host/pathogen interactions, or tissue engineering. However, DNA stability and functional integrity after long-term cultivation in such tissue models have not been investigated, yet. This study is the first showing systematic and evident data on DNA damage and functional aspects in primary human cell culture models of nasal epithelium.
Collapse
Affiliation(s)
- Pascal Ickrath
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Würzburg, Würzburg, Germany
| | - Katrin Ickrath
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Würzburg, Würzburg, Germany
| | - Maria Steinke
- Chair of Tissue Engineering and Regenerative Medicine, University Hospital Wuerzburg, Würzburg, Germany
| | - Agmal Scherzad
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Würzburg, Würzburg, Germany
| | - Norbert Kleinsasser
- Department of Otorhinolaryngology, Head and Neck Surgery, Kepler University Hospital, Linz, Austria
| | - Nina Lodes
- Chair of Tissue Engineering and Regenerative Medicine, University Hospital Wuerzburg, Würzburg, Germany
| | - Maximilian Bregenzer
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Würzburg, Würzburg, Germany
| | - Rudolf Hagen
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Würzburg, Würzburg, Germany
| | - Stephan Hackenberg
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Würzburg, Würzburg, Germany
| |
Collapse
|
11
|
Zeng G, Zhang M, Gao P, Wang J, Sun D. Algicidal Efficiency and Genotoxic Effects of Phanerochaete chrysosporium against Microcystis aeruginosa. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17114029. [PMID: 32517048 PMCID: PMC7312622 DOI: 10.3390/ijerph17114029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 05/29/2020] [Accepted: 05/30/2020] [Indexed: 11/16/2022]
Abstract
Eutrophication has become a severe environmental problem. This study evaluated the algicidal efficiency and genotoxic effects of Microcystis aeruginosa co-cultured with Phanerochaete chrysosporium for 48 h under the optimum conditions of 250 mg/L of P. chrysosporium at 25 °C with dissolved oxygen content of 7.0 mg/L. The results showed that the activity of algal dehydrogenase, superoxide dismutase, and peroxidase were all decreased and the malondialdehyde content increased after co-culturing. Fourier transform infrared spectroscopy and scanning electron microscopy observations showed that the functional group and structure of algal cells were significantly changed. Compared with those of control tadpoles, blood cells of Fejervarya multistriata tadpoles had increased micronucleus frequency (from 1.05 ± 0.09 to 1.99 ± 0.05) and abnormal nuclei (from 2.45 ± 0.06 to 5.83 ± 0.07). The tail length of M. aeruginosa co-cultured with P. chrysosporium increased from 1.12 ± 0.21 to 21.68 ± 0.34, and the comet length increased from 6.45 ± 0.09 to 36.45 ± 0.67 within 48 h. Micronucleus assay and Comet assay results demonstrated that P. chrysosporium might effectively remove algae and reduce genotoxic effects and may be safe for aquatic ecosystems.
Collapse
Affiliation(s)
- Guoming Zeng
- Chongqing Engineering Laboratory of Nano/Micro Biological Medicine Detection Technology, School of Architecture and Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; (G.Z.); (M.Z.); (P.G.); (J.W.)
| | - Maolan Zhang
- Chongqing Engineering Laboratory of Nano/Micro Biological Medicine Detection Technology, School of Architecture and Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; (G.Z.); (M.Z.); (P.G.); (J.W.)
| | - Pei Gao
- Chongqing Engineering Laboratory of Nano/Micro Biological Medicine Detection Technology, School of Architecture and Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; (G.Z.); (M.Z.); (P.G.); (J.W.)
| | - Jiale Wang
- Chongqing Engineering Laboratory of Nano/Micro Biological Medicine Detection Technology, School of Architecture and Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; (G.Z.); (M.Z.); (P.G.); (J.W.)
| | - Da Sun
- Institute of Life Sciences & Biomedicine Collaborative Innovation Center, Wenzhou University, Wenzhou 325035, China
- Correspondence: ; Tel./Fax: +86-173-6586-6501
| |
Collapse
|
12
|
Ickrath P, Scherzad A, Kleinsasser N, Ginzkey C, Hagen R, Hackenberg S. Influence of nasal polyp tissue on the differentiation and activation of T lymphocytes in a co-culture system. Biomed Rep 2019; 10:119-126. [PMID: 30719290 DOI: 10.3892/br.2019.1185] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 12/18/2018] [Indexed: 12/22/2022] Open
Abstract
T cell subpopulations in nasal polyps differ from peripheral lymphocytes in patients with chronic rhinosinusitis with nasal polyps (CRSwNP). However, little is known about the modulatory influence of the inflamed nasal polyp epithelial cells on the phenotype of the T cells. The aim of the present study was to assess this interaction. Tissue and blood samples were collected from 16 patients undergoing paranasal sinus surgery. Polypoid tissue was cultured under air-liquid interface conditions. Subsequently, cluster of differentiation (CD)3/CD28 activated peripheral lymphocytes from the same patients were added. After 3 days lymphocytes were separated from co-culture and analyzed by multicolor flow cytometry. Additionally, cytokine expression of the polyp tissue was measured using a human T helper cell (TH)1/TH2/TH17 antibody array. Viability staining of CD3+ lymphocytes detected fewer apoptotic cells under co-culture conditions compared with in mono-culture. There was a significantly higher frequency of CD4+ and CD8+ T cells in the co-culture system than in PBMC culture alone. Human leukocyte antigen (HLA)-DR isotype was significantly downregulated on co-cultured CD3+ lymphocytes and CD3+CD4+ T cells compared with the mono-cultured counterparts. Conventional Forkhead box P3- memory CD4+ T cells and activated regulatory T cells increased in frequency, and resting regulatory T cells decreased in the co-culture. Cytokine analysis identified expression of interleukin (IL)-6, IL-6 receptor, granulocyte-macrophage colony-stimulating factor, transforming growth factor-β and macrophage inflammatory protein-3 in the polyp tissue. In summary, the present study performed a comparison between peripheral lymphocytes cultured with and without nasal polyp tissue cells was performed. The downregulation of HLA and the differentiation of Treg and Tconv by nasal polypoid tissue on PBMCs was demonstrated. Interestingly, the in vivo downregulation of HLA-DR on CD3+ lymphocytes, as reported previously, was confirmed in vitro. The inhibitory effect of polypoid tissue on the activation of lymphocytes is a possible pathogenic mechanism underlying CRSwNP.
Collapse
Affiliation(s)
- Pascal Ickrath
- Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Würzburg, D-97080 Würzburg, Germany
| | - Agmal Scherzad
- Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Würzburg, D-97080 Würzburg, Germany
| | - Norbert Kleinsasser
- Department of Otorhinolaryngology, Head and Neck Surgery, Kepler University Hospital, 4021 Linz, Austria
| | - Chr Ginzkey
- Department of Oto-Rhino-Laryngology, Head and Neck Surgery, Otto Koerner Rostock University Medical Center, D-18057 Rostock, Germany
| | - Rudolf Hagen
- Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Würzburg, D-97080 Würzburg, Germany
| | - Stephan Hackenberg
- Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Würzburg, D-97080 Würzburg, Germany
| |
Collapse
|
13
|
Villacis RAR, Filho JS, Piña B, Azevedo RB, Pic-Taylor A, Mazzeu JF, Grisolia CK. Integrated assessment of toxic effects of maghemite (γ-Fe 2O 3) nanoparticles in zebrafish. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 191:219-225. [PMID: 28866281 DOI: 10.1016/j.aquatox.2017.08.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 07/25/2017] [Accepted: 08/05/2017] [Indexed: 06/07/2023]
Abstract
The increasing use of nanotechnology in the last decade has raised concerns about the impact of nanoparticles in the environment. In particular, the potential harmful effects of iron oxide nanoparticles (IONPs) in aquatic organisms have been poorly addressed. We analyze here the toxic effects induced by IONPs in zebrafish using a combination of classical (genotoxicity, oxidative stress) and molecular (transcriptomic) methodologies. Adult animals were exposed for 96h to five sub-lethal IONP concentrations, ranging from 4.7 to 74.4mg/L. Comet and micronucleus assays revealed a significant number of DNA lesions induced by IONPs at all concentrations tested. Conversely, the thiobarbituric acid reactive substances (TBARS) test detected only a mild oxidative damage in liver cells (∼1.5-fold increase of malondialdehyde concentrations) and only at the two higher IONP concentrations tested. Microarray analysis of liver samples identified 953 transcripts (927 unique genes) differentially expressed between controls and IONP-exposed samples. Subsequent functional analysis identified genes related to cation/metal ion binding, membrane formation, and morphogenesis among the transcripts overrepresented upon IONP treatments, whereas mRNAs encompassing genes associated with RNA biogenesis, translation, ribosomes, and several metabolic processes became underrepresented in treated samples. Taken together, these results indicate considerable genotoxic effects of IONPs combined with general negative effect on cell growth and on the ability of the cell produce new proteins. On the contrary, IONPs showed only a limited capacity to induce oxidative stress. To our knowledge, this is the first study on IONPs toxicity using such an integrative approach in an aquatic organism.
Collapse
Affiliation(s)
- Rolando A R Villacis
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasília-UnB, Brasília, DF, Brazil
| | - José S Filho
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasília-UnB, Brasília, DF, Brazil
| | - Benjamin Piña
- Department of Environmental Chemistry, IDAEA-CSIC, Barcelona, Catalonia, Spain
| | - Ricardo B Azevedo
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasília-UnB, Brasília, DF, Brazil
| | - Aline Pic-Taylor
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasília-UnB, Brasília, DF, Brazil
| | - Juliana F Mazzeu
- Faculty of Medicine, Faculty of Health Sciences, University of Brasília-UnB, Brasília, DF, Brazil
| | - Cesar K Grisolia
- Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasília-UnB, Brasília, DF, Brazil.
| |
Collapse
|
14
|
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
|
15
|
Jeong SC, Cho Y, Song MK, Lee E, Ryu JC. Epidermal growth factor receptor (EGFR)-MAPK-nuclear factor(NF)-κB-IL8: A possible mechanism of particulate matter(PM) 2.5-induced lung toxicity. ENVIRONMENTAL TOXICOLOGY 2017; 32:1628-1636. [PMID: 28101945 DOI: 10.1002/tox.22390] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 12/16/2017] [Accepted: 12/22/2016] [Indexed: 05/20/2023]
Abstract
Airway inflammation plays a central role in the pathophysiology of diverse pulmonary diseases. In this study, we investigated whether exposure to particulate matter (PM) 2.5, a PM with an aerodynamic diameter of less than 2.5 µm, enhances inflammation-related toxicity in the human respiratory system through activation of the epidermal growth factor receptor (EGFR) signaling pathway. Through cytokine antibody array analysis of two extracts of PM2.5 [water (W-PM2.5 ) and organic (O-PM2.5 ) soluble extracts] exposed to A549 (human alveolar epithelial cell), we identified eight cytokines changed their expression with W-PM2.5 and three cytokines with O-PM2.5 . Among them, epidermal growth factor (EGF) was commonly up-regulated by W-PM2.5 and O-PM2.5 . Then, in both groups, we can identify the increase in EGF receptor protein levels. Likewise, increases in the phosphorylation of ERK1/2 MAP kinase and acetylation of nuclear factor(NF)-κB were detected. We also detected an increase in IL-8 that was related to inflammatory response. And using the erlotinib as an inhibitor of EGFR, we identified the erlotinib impaired the phosphorylation of EGFR, ERK1/2, acetylation of NF-κB proteins and decreased IL-8. Furthermore, at in vivo model, we were able to identify similar patterns. These results suggest that PM2.5 may contribute to an abnormality in the human respiratory system through EGFR, MAP kinase, NF-κB, and IL-8 induced toxicity signaling. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 1628-1636, 2017.
Collapse
Affiliation(s)
- Seung-Chan Jeong
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science & Technology, P.O. Box 131, Cheongryang, Seoul, 130-650, Korea
- Department of Preventive Medicine, Korea University, Korea Project for Reducing Light Pollution Effects to Human and Ecosystem, Korea
| | - Yoon Cho
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science & Technology, P.O. Box 131, Cheongryang, Seoul, 130-650, Korea
| | - Mi-Kyung Song
- National Center for Efficacy evaluation for Respiratory disease product, Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology, 30 Baehak1-gil, Jeongeup, Jeollabuk-do, 53212, Republic of Korea
| | - Eunil Lee
- Department of Preventive Medicine, Korea University, Korea Project for Reducing Light Pollution Effects to Human and Ecosystem, Korea
| | - Jae-Chun Ryu
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science & Technology, P.O. Box 131, Cheongryang, Seoul, 130-650, Korea
- Department of Pharmacology and Toxicology, Human and Environmental Toxicology, Korea University of Science and Technology, Gajeong-Ro 217, Yuseong-gu, Daejeon, 305-350, Korea
| |
Collapse
|
16
|
Jeong SC, Song MK, Cho Y, Lee E, Ryu JC. Integrative analysis of mRNA and microRNA expression of a human alveolar epithelial cell(A549) exposed to water and organic-soluble extract from particulate matter (PM) 2.5. ENVIRONMENTAL TOXICOLOGY 2017; 32:302-310. [PMID: 26791009 DOI: 10.1002/tox.22236] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 12/24/2015] [Accepted: 12/26/2015] [Indexed: 06/05/2023]
Abstract
MicroRNA (miRNA) is now attracting attention as a powerful negative regulator of messenger RNA(mRNA) levels, and is implicated in the modulation of important mRNA networks involved in toxicity. In this study, we assessed the effects of particulate matter 2.5 (PM2.5 ), one of the most significant air pollutants, on miRNA and target gene expression. We exposed human alveolar epithelial cell (A549) to two types of PM2.5 [water (W-PM2.5 ) and organic (O-PM2.5 ) soluble extracts] and performed miRNA microarray analysis. A total of 37 miRNAs and 62 miRNAs were altered 1.3-fold in W-PM2.5 and O-PM2.5 , respectively. Integrated analyses of miRNA and mRNA expression profiles identified negative correlations between miRNA and mRNA in both W-PM2.5 and O-PM2.5 exposure groups. Gene ontology and Kyoto encyclopedia of genes and genomes (KEGG) pathway analyses showed that the 35 W-PM2.5 target genes are involved in responses to nutrients, positive regulation of biosynthetic processes, positive regulation of nucleobase, nucleoside, and nucleotide, and nucleic acid metabolic processes; while the 69 O-PM2.5 target genes are involved in DNA replication, cell cycle processes, the M phase, and the cell cycle check point. We suggest that these target genes may play important roles in PM2.5 -induced respiratory toxicity by miRNA regulation. These results demonstrate an integrated miRNA-mRNA approach for identifying molecular events induced by environmental pollutants in an in vitro human model. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 302-310, 2017.
Collapse
Affiliation(s)
- Seung-Chan Jeong
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, 130-650, Korea
- Department of Preventive Medicine, Korea University, Korea Project for Reducing Light Pollution Effects to Human and Ecosystem, Korea
| | - Mi-Kyung Song
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, 130-650, Korea
| | - Yoon Cho
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, 130-650, Korea
| | - Eunil Lee
- Department of Preventive Medicine, Korea University, Korea Project for Reducing Light Pollution Effects to Human and Ecosystem, Korea
| | - Jae-Chun Ryu
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, 130-650, Korea
- Department of Pharmacology and Toxicology, Human and Environmental Toxicology, Korea University of Science and Technology, Gajeong-Ro 217, Yuseong-Gu, Daejeon, 305-350, Korea
| |
Collapse
|
17
|
Koehler C, Paulus M, Ginzkey C, Hackenberg S, Scherzad A, Ickrath P, Hagen R, Kleinsasser N. The Proinflammatory Potential of Nitrogen Dioxide and Its Influence on the House Dust Mite Allergen Der p 1. Int Arch Allergy Immunol 2016; 171:27-35. [PMID: 27820923 DOI: 10.1159/000450751] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 09/12/2016] [Indexed: 11/19/2022] Open
Abstract
Asthma and allergies are both major global health problems with an increasing prevalence, and environmental data implicate an influence of air pollutants on their development. The present study focuses on the influence of nitrogen dioxide (NO2) and the major allergen of the house dust mite Der p 1 on human nasal epithelial cells of nonallergic patients in vitro. Nasal epithelial mucosa samples of 11 donors were harvested during nasal air passage surgery and cultured as an air-liquid interface. Exposure to 0.1, 1 and 10 ppm NO2 or synthetic air as a control was performed for 1 h. Subsequently, the cells were exposed to Der p 1 for 24 h. The release of interleukin (IL)-6 and IL-8 was measured by ELISA, and the production of IL-6 mRNA and IL-8 mRNA was measured by RT-PCR. NO2 exposure resulted in a concentration-dependent release of IL-6, but not IL-8 release. The coexposure of 0.1 ppm NO2 and Der p 1, or 1 ppm NO2 and Der p 1 significantly increased both IL-6 and IL-8 release. Exposure to NO2, Der p 1, or their combination, did not significantly influence the production of IL-6 or IL-8 mRNA. In conclusion, NO2 increases the release of inflammatory cytokines in human nasal epithelial cells, especially in coexposure with Der p 1, as a mechanism of allergotoxicology.
Collapse
Affiliation(s)
- Christian Koehler
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University Hospital of Würzburg, Würzburg, Germany
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Ginzkey C, Zinnitsch S, Steussloff G, Koehler C, Hackenberg S, Hagen R, Kleinsasser NH, Froelich K. Assessment of HEMA and TEGDMA induced DNA damage by multiple genotoxicological endpoints in human lymphocytes. Dent Mater 2015; 31:865-76. [DOI: 10.1016/j.dental.2015.04.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 02/13/2015] [Accepted: 04/17/2015] [Indexed: 10/23/2022]
|
19
|
Song MK, Lee HS, Ryu JC. Integrated analysis of microRNA and mRNA expression profiles highlights aldehyde-induced inflammatory responses in cells relevant for lung toxicity. Toxicology 2015; 334:111-21. [DOI: 10.1016/j.tox.2015.06.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 06/08/2015] [Accepted: 06/09/2015] [Indexed: 12/12/2022]
|
20
|
Gene expression profiling of human alveolar epithelial cells (A549 cells) exposed to atmospheric particulate matter 2.5 (PM2.5) collected from Seoul, Korea. Mol Cell Toxicol 2015. [DOI: 10.1007/s13273-014-0040-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
21
|
Rojas E, Lorenzo Y, Haug K, Nicolaissen B, Valverde M. Epithelial cells as alternative human biomatrices for comet assay. Front Genet 2014; 5:386. [PMID: 25506353 PMCID: PMC4246922 DOI: 10.3389/fgene.2014.00386] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 10/22/2014] [Indexed: 01/01/2023] Open
Abstract
The comet assay is a valuable experimental tool aimed at mapping DNA damage in human cells in vivo for environmental and occupational monitoring, as well as for therapeutic purposes, such as storage prior to transplant, during tissue engineering, and in experimental ex vivo assays. Furthermore, due to its great versatility, the comet assay allows to explore the use of alternative cell types to assess DNA damage, such as epithelial cells. Epithelial cells, as specialized components of many organs, have the potential to serve as biomatrices that can be used to evaluate genotoxicity and may also serve as early effect biomarkers. Furthermore, 80% of solid cancers are of epithelial origin, which points to the importance of studying DNA damage in these tissues. Indeed, studies including comet assay in epithelial cells have either clear clinical applications (lens and corneal epithelial cells) or examine genotoxicity within human biomonitoring and in vitro studies. We here review improvements in determining DNA damage using the comet assay by employing lens, corneal, tear duct, buccal, and nasal epithelial cells. For some of these tissues invasive sampling procedures are needed. Desquamated epithelial cells must be obtained and dissociated prior to examination using the comet assay, and such procedures may induce varying amounts of DNA damage. Buccal epithelial cells require lysis enriched with proteinase K to obtain free nucleosomes. Over a 30 year period, the comet assay in epithelial cells has been little employed, however its use indicates that it could be an extraordinary tool not only for risk assessment, but also for diagnosis, prognosis of treatments and diseases.
Collapse
Affiliation(s)
- Emilio Rojas
- Depto. Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México México, México
| | - Yolanda Lorenzo
- Department of Ophthalmology, Center for Eye Research, Oslo University Hospital, Ullevål, University of Oslo Oslo, Norway
| | - Kristiane Haug
- Department of Ophthalmology, Center for Eye Research, Oslo University Hospital, Ullevål, University of Oslo Oslo, Norway
| | - Bjørn Nicolaissen
- Department of Ophthalmology, Center for Eye Research, Oslo University Hospital, Ullevål, University of Oslo Oslo, Norway
| | - Mahara Valverde
- Depto. Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México México, México
| |
Collapse
|
22
|
Song MK, Choi HS, Lee HS, Ryu JC. Transcriptome Profile Analysis of Saturated Aliphatic Aldehydes Reveals Carbon Number-Specific Molecules Involved in Pulmonary Toxicity. Chem Res Toxicol 2014; 27:1362-70. [DOI: 10.1021/tx500171r] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mi-Kyung Song
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science & Technology P.O. Box 131, Cheongryang, Seoul 130-650, Korea
| | - Han-Seam Choi
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science & Technology P.O. Box 131, Cheongryang, Seoul 130-650, Korea
| | - Hyo-Sun Lee
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science & Technology P.O. Box 131, Cheongryang, Seoul 130-650, Korea
| | - Jae-Chun Ryu
- Cellular and Molecular Toxicology Laboratory, Korea Institute of Science & Technology P.O. Box 131, Cheongryang, Seoul 130-650, Korea
- Department of Pharmacology and Toxicology,
Human and Environmental Toxicology, Korea University of Science and Technology, Gajeong-Ro 217, Yuseong-gu, Daejeon 305-350, Korea
| |
Collapse
|
23
|
Analysis of dose-response to hexanal-induced gene expression in A549 human alveolar cells. BIOCHIP JOURNAL 2014. [DOI: 10.1007/s13206-014-8202-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
24
|
Marcon A, Fracasso ME, Marchetti P, Doria D, Girardi P, Guarda L, Pesce G, Pironi V, Ricci P, de Marco R. Outdoor formaldehyde and NO2 exposures and markers of genotoxicity in children living near chipboard industries. ENVIRONMENTAL HEALTH PERSPECTIVES 2014; 122:639-45. [PMID: 24694350 PMCID: PMC4050513 DOI: 10.1289/ehp.1307259] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Accepted: 03/31/2014] [Indexed: 05/05/2023]
Abstract
BACKGROUND Industrial air pollution is a public health hazard. Previous evidence documented increased respiratory symptoms and hospitalizations in children who live near the factories in the largest chipboard manufacturing district in Italy (Viadana). OBJECTIVES We evaluated the association of outdoor exposure to formaldehyde and nitrogen dioxide (NO2) with markers of early genotoxic damage in oral mucosa cells of randomly selected children (6-12 years of age) living in Viadana. METHODS In 2010-2011, DNA strand breaks and nuclear abnormalities were evaluated in exfoliated buccal cells by the comet and micronucleus assays, respectively, and formaldehyde and NO2 were monitored by passive sampling. Annual exposure estimates to pollutants were assigned to children's houses by spatial interpolation. RESULTS Of 656 children, 413 (63%) participated. Children living near (< 2 km) the chipboard industries had the highest average exposure to formaldehyde and NO2 (p < 0.001). A 1-SD increase in formaldehyde (0.20 μg/m(3)) was associated with a 0.13% (95% CI: 0.03, 0.22%) higher comet tail intensity, a 0.007 (95% CI: 0.001, 0.012) higher tail moment, and a 12% relative increase [relative risk (RR) = 1.12; 95% CI: 1.02, 1.23] in nuclear buds. A 1-SD NO2 increase (2.13 μg/m(3)) was associated with a 0.13% (95% CI: 0.07, 0.19%) increase in binucleated cells and a 16% relative increase (RR = 1.16; 95% CI: 1.06, 1.26) in nuclear buds. CONCLUSIONS Exposure to pollutants was associated with markers of genotoxicity in exfoliated buccal cells of children living in a region with chipboard industries. These findings, combined with previously reported associations between chipboard industrial activities and respiratory outcomes in children, add to concerns about potential adverse effects of industry-related exposures in the Viadana district.
Collapse
Affiliation(s)
- Alessandro Marcon
- Unit of Epidemiology and Medical Statistics, Department of Public Health and Community Medicine, University of Verona, Verona, Italy
| | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Ginzkey C, Steussloff G, Koehler C, Burghartz M, Scherzed A, Hackenberg S, Hagen R, Kleinsasser NH. Nicotine derived genotoxic effects in human primary parotid gland cells as assessed in vitro by comet assay, cytokinesis-block micronucleus test and chromosome aberrations test. Toxicol In Vitro 2014; 28:838-46. [PMID: 24698733 DOI: 10.1016/j.tiv.2014.03.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 03/14/2014] [Accepted: 03/23/2014] [Indexed: 10/25/2022]
Abstract
Genotoxic effects of nicotine were described in different human cells including salivary gland cells. Based on the high nicotine concentration in saliva of smokers or patients using therapeutic nicotine patches, the current study was performed to evaluate the genotoxic potential of nicotine in human salivary gland cells. Therefore, primary salivary gland cells from 10 patients undergoing parotid gland surgery were exposed to nicotine concentrations between 1 μM and 1000 μM for 1 h in the absence of exogenous metabolic activation. The acinar phenotype was proven by immunofluorescent staining of alpha-amylase. Genotoxic effects were evaluated using the Comet assay, the micronucleus test and the chromosome aberration test. Cytotoxicity and apoptosis were determined by trypan blue exclusion test and Caspase-3 assay. Nicotine was able to induce genotoxic effects in all three assays. The chromosome aberration test was the most sensitive and increases in numerical and structural (chromatid-type and chromosome-type) aberrations were seen at ≥1 μM, whereas increases in micronuclei frequency were detected at 10 μM and DNA damage as measured in the Comet assay was noted at >100 μM. No cytotoxic damage or influence of apoptosis could be demonstrated. Nicotine as a possible risk factor for tumor initiation in salivary glands is still discussed controversially. Our results demonstrated the potential of nicotine to induce genotoxic effects in salivary gland cells. These results were observed at saliva nicotine levels similar to those found after oral or transdermal exposure to nicotine and suggest the necessity of careful monitoring of the use of nicotine in humans.
Collapse
Affiliation(s)
- Christian Ginzkey
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University Hospital of Wuerzburg, Josef-Schneider-Str. 11, D-97080 Wuerzburg, Germany.
| | - Gudrun Steussloff
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University Hospital of Wuerzburg, Josef-Schneider-Str. 11, D-97080 Wuerzburg, Germany.
| | - Christian Koehler
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University Hospital of Wuerzburg, Josef-Schneider-Str. 11, D-97080 Wuerzburg, Germany.
| | - Marc Burghartz
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University Hospital of Wuerzburg, Josef-Schneider-Str. 11, D-97080 Wuerzburg, Germany.
| | - Agmal Scherzed
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University Hospital of Wuerzburg, Josef-Schneider-Str. 11, D-97080 Wuerzburg, Germany.
| | - Stephan Hackenberg
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University Hospital of Wuerzburg, Josef-Schneider-Str. 11, D-97080 Wuerzburg, Germany.
| | - Rudolf Hagen
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University Hospital of Wuerzburg, Josef-Schneider-Str. 11, D-97080 Wuerzburg, Germany.
| | - Norbert H Kleinsasser
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University Hospital of Wuerzburg, Josef-Schneider-Str. 11, D-97080 Wuerzburg, Germany.
| |
Collapse
|
26
|
Integrated analysis of microRNA and mRNA expression profiles highlights alterations in modulation of the apoptosis-related pathway under nonanal exposure. Mol Cell Toxicol 2014. [DOI: 10.1007/s13273-013-0044-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
27
|
Demircigil GÇ, Erdem O, Gaga EO, Altuğ H, Demirel G, Özden Ö, Arı A, Örnektekin S, Döğeroğlu T, van Doorn W, Burgaz S. Cytogenetic biomonitoring of primary school children exposed to air pollutants: micronuclei analysis of buccal epithelial cells. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:1197-1207. [PMID: 23884878 DOI: 10.1007/s11356-013-2001-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 07/10/2013] [Indexed: 06/02/2023]
Abstract
There is an increasing attempt in the world to determine the exposures of children to environmental chemicals. To analyze the genotoxic effect of air pollution, micronucleus (MN) assay was carried out in buccal epithelial cells (BECs) of children living in an urban city of Turkey. Children from two schools at urban-traffic and suburban sites were investigated in summer and winter seasons for the determination of BEC-MN frequency (per mille) and frequency of BEC with MN (per mille). The same children were also recruited for lung function measurements within a MATRA project ("Together Towards Clean Air in Eskisehir and Iskenderun") Measured NO2 and SO2 concentrations did not exceed the European Union (EU) limit levels either in urban-traffic or suburban regions. Higher O3 concentrations were measured in the suburban site especially in the summer period. Particulate matter (PM2.5 and PM10) levels which did not differ statistically between two regions were above the EU limits in general. Although BEC-MN frequencies of children living in the suburban sites were higher in general, the difference between two regions was not significant either in the summer or winter periods. BEC-MN frequencies of the urban-traffic children were found to be significantly higher in summer period (mean ± SD, 2.68 ± 1.99) when compared to winter period (1.64 ± 1.59; p = 0.004). On the other hand, no seasonality was observed for the suburban children. Similar results have been obtained in the BEC frequency with MN in our study. In summer, BEC-MN frequencies were significantly increased with the decrease in pulmonary function levels based on forced expiratory flow between 25 and 75% of vital capacity (FEF25-75%) levels (p < 0.05). As a conclusion, children living in urban-traffic and suburban areas in the city of Eskişehir exhibited similar genotoxicity. Seasonal variation in genotoxicity may be interpreted as relatively high ozone levels and increasing time spent at outdoors in the summer.
Collapse
|
28
|
Song MK, Choi HS, Lee HS, Kim YJ, Park YK, Ryu JC. Analysis of microRNA and mRNA expression profiles highlights alterations in modulation of the MAPK pathway under octanal exposure. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2014; 37:84-94. [PMID: 24316354 DOI: 10.1016/j.etap.2013.11.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2013] [Revised: 10/06/2013] [Accepted: 11/01/2013] [Indexed: 06/02/2023]
Abstract
Previous environmental microRNA (miRNA) studies have investigated a limited number of candidate miRNAs and have not evaluated functional effects on gene expression. In this study, we aimed to identify octanal (OC)-sensitive miRNAs and to characterize the relationships between miRNAs and expression of candidate genes involved in OC-induced toxicity. Microarray analysis identified 15 miRNAs that were differentially expressed in OC-exposed A549 human alveolar cells. Integrated analyses of miRNA and mRNA expression profiles identified significant miRNA-mRNA anti-correlations. GO analysis of 101 putative target genes showed that the biological category 'MAPK signaling pathway' was prominently annotated. Moreover, we detected increased phosphorylation of p38 MAPK in the OC-exposed group. By integrating the transcriptome and microRNAome, we provide evidence that OC can affect MAPK-induced toxicity signaling. Therefore, this study demonstrates the added value of an integrated miRNA-mRNA approach for identifying molecular events induced by environmental pollutants in an in vitro human model.
Collapse
Affiliation(s)
- Mi-Kyung Song
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science & Technology P.O. Box 131, Cheongryang, Seoul 130-650, Korea; School of Life Sciences and Biotechnology, Korea University, Anam-Dong, Seoungbuk-Gu, Seoul 136-791, Korea
| | - Han-Seam Choi
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science & Technology P.O. Box 131, Cheongryang, Seoul 130-650, Korea
| | - Hyo-Sun Lee
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science & Technology P.O. Box 131, Cheongryang, Seoul 130-650, Korea
| | - Youn-Jung Kim
- Department of Marine Sciences, Incheon National University, 12-1 Songdo-dong, Yeonsu-gu, Incheon 406-772, Korea
| | - Yong-Keun Park
- School of Life Sciences and Biotechnology, Korea University, Anam-Dong, Seoungbuk-Gu, Seoul 136-791, Korea
| | - Jae-Chun Ryu
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science & Technology P.O. Box 131, Cheongryang, Seoul 130-650, Korea.
| |
Collapse
|
29
|
Evaluation method for the cytotoxicity of cigarette smoke by in vitro whole smoke exposure. ACTA ACUST UNITED AC 2014; 66:27-33. [DOI: 10.1016/j.etp.2013.07.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 07/04/2013] [Accepted: 07/29/2013] [Indexed: 11/23/2022]
|
30
|
Song MK, Lee HS, Choi HS, Shin CY, Kim YJ, Park YK, Ryu JC. Octanal-induced inflammatory responses in cells relevant for lung toxicity. Hum Exp Toxicol 2013; 33:710-21. [DOI: 10.1177/0960327113506722] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Inhalation is an important route of aldehyde exposure, and lung is one of the main targets of aldehyde toxicity. Octanal is distributed ubiquitously in the environment and is a component of indoor air pollutants. We investigated whether octanal exposure enhances the inflammatory response in the human respiratory system by increasing the expression and release of cytokines and chemokines. The effect of octanal in transcriptomic modulation was assessed in the human alveolar epithelial cell line A549 using oligonucleotide arrays. We identified a set of genes differentially expressed upon octanal exposure that may be useful for monitoring octanal pulmonary toxicity. These genes were classified according to the Gene Ontology functional category and Kyoto Encyclopedia of Genes and Genomes analysis to explore the biological processes related to octanal-induced pulmonary toxicity. The results show that octanal affects the expression of several chemokines and inflammatory cytokines and increases the levels of interleukin 6 (IL-6) and IL-8 released. In conclusion, octanal exposure modulates the expression of cytokines and chemokines important in the development of lung injury and disease. This suggests that inflammation contributes to octanal-induced lung damage and that the inflammatory genes expressed should be studied in detail, thereby laying the groundwork for future biomonitoring studies.
Collapse
Affiliation(s)
- M-K Song
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea
- School of Life Sciences and Biotechnology, Korea University, Anam-Dong, Seoungbuk-Gu, Seoul, Korea
| | - H-S Lee
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea
| | - H-S Choi
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea
| | - C-Y Shin
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea
| | - Y-J Kim
- Department of Marine Sciences, Incheon National University, Yeonsu-gu, Incheon, Korea
| | - Y-K Park
- School of Life Sciences and Biotechnology, Korea University, Anam-Dong, Seoungbuk-Gu, Seoul, Korea
| | - J-C Ryu
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea
| |
Collapse
|
31
|
Koehler C, Thielen S, Ginzkey C, Hackenberg S, Scherzed A, Burghartz M, Paulus M, Hagen R, Kleinsasser NH. Nitrogen dioxide is genotoxic in urban concentrations. Inhal Toxicol 2013; 25:341-7. [PMID: 23701639 DOI: 10.3109/08958378.2013.788104] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In the discussion on toxic and genotoxic thresholds of air pollutants such as nitrogen dioxide (NO2), realistically low urban concentration ranges are of major interest. For NO2, the WHO defines the annual limit value as corresponding to 0.02 ppm. In the present study, the toxicity and genotoxicity of NO2 is set at a concentration under this limit value and examined in human nasal epithelium at different exposure durations in vitro. Nasal epithelial mucosa samples of 10 donors were harvested during nasal air passage surgery and cultured as an air-liquid interface. Exposure to 0.01 ppm NO2 or synthetic air as a control was performed for 0.5, 1, 2 and 3 h. Analysis included the caspase-3 ELISA, the single cell microgel electrophoresis (comet) assay and the micronucleus assay. The caspase-3 activity was not influenced by NO2 exposure, DNA strand fragmentation correlated with exposure durations to NO2 at 0.01 ppm NO2, and no cytotoxic effects such as apoptosis, necrosis or disturbances of cell proliferation were present. However, micronucleus induction as a sign of genotoxicity at an exposure duration of 3 h could be shown. Shorter exposures did not induce micronucleus formation. In summary, genotoxicity of NO2 could be demonstrated at a common urban concentration in vitro, but a threshold of NO2 genotoxicity could not be defined based on the present experiments.
Collapse
Affiliation(s)
- Christian Koehler
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University Hospital of Wuerzburg, Wuerzburg, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Yang BC, Yang ZH, Pan XJ, Xiao FJ, Liu XY, Zhu MX, Xie JP. Crotonaldehyde-exposed macrophages induce IL-8 release from airway epithelial cells through NF-κB and AP-1 pathways. Toxicol Lett 2013; 219:26-34. [PMID: 23458894 DOI: 10.1016/j.toxlet.2013.02.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 02/18/2013] [Accepted: 02/19/2013] [Indexed: 11/24/2022]
|
33
|
Han M, Guo Z, Li G, Sang N. Nitrogen dioxide inhalation induces genotoxicity in rats. CHEMOSPHERE 2013; 90:2737-2742. [PMID: 23332788 DOI: 10.1016/j.chemosphere.2012.11.057] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 11/12/2012] [Accepted: 11/21/2012] [Indexed: 06/01/2023]
Abstract
Nitrogen dioxide (NO(2)) is a ubiquitous reactive free-radical gas, which has been associated with momentary and chronic health effects. In the present study, comet, micronucleus (MN) and DNA-protein crosslinks (DPC) assays were used to investigate the genotoxicity following in vivo inhalation exposure of rats to NO(2). The results show that inhalation exposure of rats to NO(2) induced DNA strand breakage and the formation of DPC in the cells from various internal organs (brain, lung, liver, spleen, kidney and heart), as well as resulted in obvious increase of MN frequency in the bone marrow cells of rats. Furthermore, above genotoxic responses showed significant linear dose-dependent manners. These results implicate that NO(2) is a genotoxic agent and these observations are informative for understanding the mechanisms of adverse effects of nitrogen dioxide.
Collapse
Affiliation(s)
- Ming Han
- College of Environment and Resource, Center of Environmental Science and Engineering, Shanxi University, Taiyuan, Shanxi 030006, PR China
| | | | | | | |
Collapse
|
34
|
Ginzkey C, Friehs G, Koehler C, Hackenberg S, Hagen R, Kleinsasser NH. Assessment of nicotine-induced DNA damage in a genotoxicological test battery. Mutat Res 2012. [PMID: 23200805 DOI: 10.1016/j.mrgentox.2012.11.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The role of the tobacco-alkaloid nicotine in tumour biology is widely discussed in the literature. Due to a strong capacity to induce angiogenesis, a pro-mutagenic potential in non-tumour and cancer cells, and a pro- and anti-apoptotic influence, nicotine seems to promote the growth of established tumours. However, results indicating DNA damage and genetic instability associated with nicotine have been contradictory thus far. A variety of markers and endpoints of genotoxicity are required to characterize the genotoxic potential of nicotine. Induction of DNA single- and double-strand breaks, the formation of micronuclei, and the induction of sister chromatid exchange and chromosome aberrations represent possible genotoxicological endpoints at different cellular levels. Human lymphocytes were exposed to nicotine concentrations between 1μM and 1mM for 24h in vitro. The comet assay, the cytokinesis-block micronucleus test, the chromosome aberration (CA) test, and the sister chromatid exchange (SCE) test were then applied. Viability and apoptosis were measured by flow cytometry in combination with the annexin V-propidium iodide staining test. In this test setting, no enhanced DNA migration was measured by the comet assay. An increase in the micronucleus frequency was detected at a concentration of 100μM nicotine without affecting the frequency of apoptotic cells. A distinct genotoxic effect was determined by the CA test and the SCE test, with a significant increase in CA and SCE at a concentration of 1μM. In the annexin V test, nicotine did not influence the proportion of apoptotic or necrotic cells. The current data indicating the induction of CA by nicotine underscore the necessity of ongoing investigations on the potential of nicotine to initiate mutagenesis and tumour promotion. Taking into account the physiological nicotine plasma levels in smokers or in nicotine-replacement therapy, particularly the long-term use of nicotine should be critically discussed.
Collapse
Affiliation(s)
- Christian Ginzkey
- Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University Hospital of Wuerzburg, Germany.
| | | | | | | | | | | |
Collapse
|
35
|
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
|
36
|
Persoz C, Leleu C, Achard S, Fasseu M, Menotti J, Meneceur P, Momas I, Derouin F, Seta N. Sequential air–liquid exposure of human respiratory cells to chemical and biological pollutants. Toxicol Lett 2011; 207:53-9. [DOI: 10.1016/j.toxlet.2011.07.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Revised: 07/27/2011] [Accepted: 07/28/2011] [Indexed: 01/14/2023]
|
37
|
Ex vivo toxicity of nitrogen dioxide in human nasal epithelium at the WHO defined 1-h limit value. Toxicol Lett 2011; 207:89-95. [PMID: 21864657 DOI: 10.1016/j.toxlet.2011.08.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Revised: 08/04/2011] [Accepted: 08/05/2011] [Indexed: 11/20/2022]
Abstract
Current pollution limits indicating potential harm to human health caused by nitrogen dioxide have prompted a variety of studies on the cytotoxicity and genotoxicity of nitrogen dioxide (NO₂) in vitro. The present study focuses on toxic effects of NO₂ at the WHO defined 1-h limit value of 200 μg NO₂/m(3) air, equivalent to 0.1 ppm NO₂. Nasal epithelial mucosa cells of 10 patients were cultured as an air-liquid interface and exposed to 0.1 ppm NO₂ for 0.5 h, 1 h, 2 h and 3 h and synthetic air as negative control. After exposure, analysis of genotoxicity was performed by the alkaline single cell microgel electrophoresis (comet) assay and by the micronucleus test. Depression of proliferation and cytotoxic effects were checked by the micronucleus assay and the trypan blue exclusion assay. The experiments demonstrated significant DNA fragmentation even at the shortest exposure duration of half an hour in the comet assay. The amount of DNA fragmentation significantly increased with extended NO₂ exposure durations. The amount of DNA fragmentation increased with extended exposure durations to synthetic air at a significantly lower level as compared to NO₂ exposure. Micronucleus inductions were seen only at the longest exposure duration of 3h. There were no changes in proliferation seen in the micronucleus assay under any experimental setup. Moreover, no signs of necrosis, apoptosis or changes in viability were detected. Data demonstrate genotoxicity of NO₂ at concentrations found in the urban atmosphere during short exposure durations. DNA alterations in the micronucleus assay at an exposure time of 3h indicate a significant DNA alteration possibly being hazardous to humans.
Collapse
|