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Ryu MH, Murphy S, Hinkley M, Carlsten C. COPD Exposed to Air Pollution: A Path to Understand and Protect a Susceptible Population. Chest 2024; 165:836-846. [PMID: 37972689 DOI: 10.1016/j.chest.2023.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 09/14/2023] [Accepted: 11/09/2023] [Indexed: 11/19/2023] Open
Abstract
TOPIC IMPORTANCE Air pollution poses a risk to the respiratory health of individuals with COPD. Long- and short-term exposures to higher levels of particulate-rich air pollution are associated with increased COPD exacerbation, hospitalization, and mortality, collectively implicating air pollution as a cause of adverse COPD-related outcomes. REVIEW FINDINGS This review summarizes the evidence for COPD as a phenotype that confers susceptibility for adverse health outcomes in the face of common air pollution. We highlight how typical contributors to compromised urban air quality, including that from traffic, wildfire smoke, and indoor biomass combustion, adversely affect the COPD patient population. Evidence underscoring the burden of ongoing air pollution exposure on patients with COPD is discussed. We then detail the detrimental impact of that exposure on COPD pathophysiology, which in turn increases the patient's susceptibility. We specifically propose that indoor air is a particularly rational target for increased monitoring and remediation to protect patients with COPD. Because COPD is a heterogeneous disease with several endotypes, future intervention studies need to better include control populations, to highlight COPD-specific risks and identify subpopulations within patients with COPD who will benefit the most from improved indoor air quality. SUMMARY Regulatory efforts must continue to broadly lower emission standards to protect this susceptible population from the negative health impacts of air pollution.
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Affiliation(s)
- Min Hyung Ryu
- Air Pollution Exposure Laboratory, Division of Respiratory Medicine, The University of British Columbia, Vancouver, BC, Canada
| | - Shane Murphy
- Air Pollution Exposure Laboratory, Division of Respiratory Medicine, The University of British Columbia, Vancouver, BC, Canada
| | - Madison Hinkley
- Air Pollution Exposure Laboratory, Division of Respiratory Medicine, The University of British Columbia, Vancouver, BC, Canada
| | - Chris Carlsten
- Air Pollution Exposure Laboratory, Division of Respiratory Medicine, The University of British Columbia, Vancouver, BC, Canada; Legacy for Airway Health and Centre for Lung Health, Vancouver Coastal Health Research Institute, Vancouver, BC, Canada.
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Seyyedsalehi MS, Collatuzzo G, Teglia F, Boffetta P. Occupational exposure to diesel exhaust and head and neck cancer: a systematic review and meta-analysis of cohort studies. Eur J Cancer Prev 2024:00008469-990000000-00133. [PMID: 38502528 DOI: 10.1097/cej.0000000000000876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Exposure to diesel exhaust (DE) and other fossil fuels in the workplace can cause several health effects including cancer. We conducted a systematic review and meta-analysis of cohort studies examining the association between occupational DE exposure and the risk of head and neck cancer (HNC), including cancer of the oral cavity, pharynx and larynx. We included cohort studies mentioned in the Monograph of the International Agency for Research on Cancer, 2014, on DE. Forest plots of relative risk (RR) were constructed for HNC overall and its anatomical subtypes. A random-effects model was used to address heterogeneity between studies. Fifteen articles were included after removing duplicates and irrelevant reports. The summary RR for DE exposure was 1.08 [95% confidence interval (CI) = 1.01-1.17, P heterogeneity = <0.001] for HNC overall, 0.98 (95% CI = 0.87-1.11) for oral cavity, 1.05 (95% CI = 0.77-1.43) for pharyngeal, 1.15 (95% CI = 0.96-1.38) for oral cavity and pharyngeal combined, and 1.13 (95% CI = 1.03-1.24) for laryngeal cancer. There were elevated RRs for incidence studies of HNC (RR = 1.13; 95% CI = 1.05-1.22, P = 0.001), European studies (RR = 1.13; 95% CI = 1.05-1.23, P = 0.001), and female studies (RR = 1.77; 95% CI = 1.31-2.39, P = 0.003). Our study suggested an association between occupational DE exposure and the risk of HNC, particularly laryngeal cancer. Although residual confounding cannot be ruled out, our results support the importance of controlling occupational DE exposure.
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Affiliation(s)
- Monireh Sadat Seyyedsalehi
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
- Cancer Research Center, Cancer Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Giulia Collatuzzo
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Federica Teglia
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Paolo Boffetta
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
- Stony Brook Cancer Center, Stony Brook University
- Department of Family, Population and Preventive Medicine, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York, USA
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Neumann S, Casjens S, Hoffmeyer F, Rühle K, Gamrad-Streubel L, Haase LM, Rudolph KK, Giesen J, Neumann V, Taeger D, Pallapies D, Birk T, Brüning T, Bünger J. Club cell protein (CC16) in serum as an effect marker for small airway epithelial damage caused by diesel exhaust and blasting fumes in potash mining. Int Arch Occup Environ Health 2024; 97:121-132. [PMID: 38110551 PMCID: PMC10876725 DOI: 10.1007/s00420-023-02035-x] [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: 09/13/2023] [Accepted: 11/22/2023] [Indexed: 12/20/2023]
Abstract
OBJECTIVE The effect marker club cell protein (CC16) is secreted by the epithelium of the small respiratory tract into its lumen and passes into the blood. Increased amounts of CC16 in serum are observed during acute epithelial lung injury due to air pollutants. CC16 in serum was determined as part of this cross-sectional study in underground potash miners on acute and chronic health effects from exposures to diesel exhaust and blasting fumes. METHODS Nitrogen oxides, carbon monoxide, and diesel particulate matter were measured in 672 workers at a German potash mining site on a person-by-person basis over an early shift or midday shift, together with CC16 serum concentrations before and after the respective shift. CC16 concentrations and CC16 shift-differences were evaluated with respect to personal exposure measurements and other quantitative variables by Spearman rank correlation coefficients. CC16 shift-differences were modeled using multiple linear regression. Above-ground workers as reference group were compared to the exposed underground workers. RESULTS Serum concentrations of CC16 were influenced by personal characteristics such as age, smoking status, and renal function. Moreover, they showed a circadian rhythm. While no statistically significant effects of work-related exposure on CC16 concentrations were seen in never smokers, such effects were evident in current smokers. CONCLUSION The small airways of current smokers appeared to be vulnerable to the combination of measured work-related exposures and individual exposure to smoking. Therefore, as health protection of smokers exposed to diesel exhaust and blasting fumes, smoking cessation is strongly recommended.
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Affiliation(s)
- Savo Neumann
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany.
| | - Swaantje Casjens
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - Frank Hoffmeyer
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - Katrin Rühle
- Environment and Health, Ramboll Deutschland GmbH, City Tower-Limbecker Platz 1, 45127, Essen, Germany
| | - Lisa Gamrad-Streubel
- Environment and Health, Ramboll Deutschland GmbH, City Tower-Limbecker Platz 1, 45127, Essen, Germany
| | - Lisa-Marie Haase
- Environment and Health, Ramboll Deutschland GmbH, City Tower-Limbecker Platz 1, 45127, Essen, Germany
| | - Katharina K Rudolph
- Environment and Health, Ramboll Deutschland GmbH, City Tower-Limbecker Platz 1, 45127, Essen, Germany
| | - Jörg Giesen
- Institute for the Research on Hazardous Substances (IGF), 44789, Bochum, Germany
| | - Volker Neumann
- Institute for the Research on Hazardous Substances (IGF), 44789, Bochum, Germany
| | - Dirk Taeger
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - Dirk Pallapies
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - Thomas Birk
- Environment and Health, Ramboll Deutschland GmbH, City Tower-Limbecker Platz 1, 45127, Essen, Germany
| | - Thomas Brüning
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - Jürgen Bünger
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
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Zhu X, Zhang Q, Du X, Jiang Y, Niu Y, Wei Y, Zhang Y, Chillrud SN, Liang D, Li H, Chen R, Kan H, Cai J. Respiratory Effects of Traffic-Related Air Pollution: A Randomized, Crossover Analysis of Lung Function, Airway Metabolome, and Biomarkers of Airway Injury. ENVIRONMENTAL HEALTH PERSPECTIVES 2023; 131:57002. [PMID: 37141245 PMCID: PMC10159268 DOI: 10.1289/ehp11139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 02/19/2023] [Accepted: 03/20/2023] [Indexed: 05/05/2023]
Abstract
BACKGROUND Exposure to traffic-related air pollution (TRAP) has been associated with increased risks of respiratory diseases, but the biological mechanisms are not yet fully elucidated. OBJECTIVES Our aim was to evaluate the respiratory responses and explore potential biological mechanisms of TRAP exposure in a randomized crossover trial. METHODS We conducted a randomized crossover trial in 56 healthy adults. Each participant was exposed to high- and low-TRAP exposure sessions by walking in a park and down a road with high traffic volume for 4 h in random order. Respiratory symptoms and lung function, including forced expiratory volume in the first second (FEV 1 ), forced vital capacity (FVC), the ratio of FEV 1 to FVC, and maximal mid-expiratory flow (MMEF), were measured before and after each exposure session. Markers of 8-isoprostane, tumor necrosis factor- α (TNF- α ), and ezrin in exhaled breath condensate (EBC), and surfactant proteins D (SP-D) in serum were also measured. We used linear mixed-effects models to estimate the associations, adjusted for age, sex, body mass index, meteorological condition, and batch (only for biomarkers). Liquid chromatography-mass spectrometry was used to profile the EBC metabolome. Untargeted metabolome-wide association study (MWAS) analysis and pathway enrichment analysis using mummichog were performed to identify critical metabolomic features and pathways associated with TRAP exposure. RESULTS Participants had two to three times higher exposure to traffic-related air pollutants except for fine particulate matter while walking along the road compared with in the park. Compared with the low-TRAP exposure at the park, high-TRAP exposure at the road was associated with a higher score of respiratory symptoms [2.615 (95% CI: 0.605, 4.626), p = 1.2 × 10 - 2 ] and relatively lower lung function indicators [- 0.075 L (95% CI: - 0.138 , - 0.012 ), p = 2.1 × 10 - 2 ] for FEV 1 and - 0.190 L / s (95% CI: - 0.351 , - 0.029 ; p = 2.4 × 10 - 2 ) for MMEF]. Exposure to TRAP was significantly associated with changes in some, but not all, biomarkers, particularly with a 0.494 -ng / mL (95% CI: 0.297, 0.691; p = 9.5 × 10 - 6 ) increase for serum SP-D and a 0.123 -ng / mL (95% CI: - 0.208 , - 0.037 ; p = 7.2 × 10 - 3 ) decrease for EBC ezrin. Untargeted MWAS analysis revealed that elevated TRAP exposure was significantly associated with perturbations in 23 and 32 metabolic pathways under positive- and negative-ion modes, respectively. These pathways were most related to inflammatory response, oxidative stress, and energy use metabolism. CONCLUSIONS This study suggests that TRAP exposure might lead to lung function impairment and respiratory symptoms. Possible underlying mechanisms include lung epithelial injury, inflammation, oxidative stress, and energy metabolism disorders. https://doi.org/10.1289/EHP11139.
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Affiliation(s)
- Xinlei Zhu
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and National Health Commission Key Lab of Health Technology Assessment, Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China
| | - Qingli Zhang
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and National Health Commission Key Lab of Health Technology Assessment, Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China
| | - Xihao Du
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and National Health Commission Key Lab of Health Technology Assessment, Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China
| | - Yixuan Jiang
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and National Health Commission Key Lab of Health Technology Assessment, Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China
| | - Yue Niu
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and National Health Commission Key Lab of Health Technology Assessment, Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China
| | - Yongjie Wei
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China
| | - Yang Zhang
- Department of Systems Biology for Medicine, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Steven N. Chillrud
- Division of Geochemistry, Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York, USA
| | - Donghai Liang
- Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
| | - Huichu Li
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Renjie Chen
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and National Health Commission Key Lab of Health Technology Assessment, Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China
| | - Haidong Kan
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and National Health Commission Key Lab of Health Technology Assessment, Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China
- National Center for Children’s Health, Children’s Hospital of Fudan University, Shanghai, China
| | - Jing Cai
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and National Health Commission Key Lab of Health Technology Assessment, Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China
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Al-Rekabi Z, Dondi C, Faruqui N, Siddiqui NS, Elowsson L, Rissler J, Kåredal M, Mudway I, Larsson-Callerfelt AK, Shaw M. Uncovering the cytotoxic effects of air pollution with multi-modal imaging of in vitro respiratory models. ROYAL SOCIETY OPEN SCIENCE 2023; 10:221426. [PMID: 37063998 PMCID: PMC10090883 DOI: 10.1098/rsos.221426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 03/17/2023] [Indexed: 06/19/2023]
Abstract
Annually, an estimated seven million deaths are linked to exposure to airborne pollutants. Despite extensive epidemiological evidence supporting clear associations between poor air quality and a range of short- and long-term health effects, there are considerable gaps in our understanding of the specific mechanisms by which pollutant exposure induces adverse biological responses at the cellular and tissue levels. The development of more complex, predictive, in vitro respiratory models, including two- and three-dimensional cell cultures, spheroids, organoids and tissue cultures, along with more realistic aerosol exposure systems, offers new opportunities to investigate the cytotoxic effects of airborne particulates under controlled laboratory conditions. Parallel advances in high-resolution microscopy have resulted in a range of in vitro imaging tools capable of visualizing and analysing biological systems across unprecedented scales of length, time and complexity. This article considers state-of-the-art in vitro respiratory models and aerosol exposure systems and how they can be interrogated using high-resolution microscopy techniques to investigate cell-pollutant interactions, from the uptake and trafficking of particles to structural and functional modification of subcellular organelles and cells. These data can provide a mechanistic basis from which to advance our understanding of the health effects of airborne particulate pollution and develop improved mitigation measures.
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Affiliation(s)
- Zeinab Al-Rekabi
- Department of Chemical and Biological Sciences, National Physical Laboratory, Teddington, UK
| | - Camilla Dondi
- Department of Chemical and Biological Sciences, National Physical Laboratory, Teddington, UK
| | - Nilofar Faruqui
- Department of Chemical and Biological Sciences, National Physical Laboratory, Teddington, UK
| | - Nazia S. Siddiqui
- Faculty of Medical Sciences, University College London, London, UK
- Kingston Hospital NHS Foundation Trust, Kingston upon Thames, UK
| | - Linda Elowsson
- Lung Biology, Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Jenny Rissler
- Bioeconomy and Health, RISE Research Institutes of Sweden, Lund, Sweden
- Ergonomics and Aerosol Technology, Lund University, Lund, Sweden
| | - Monica Kåredal
- Occupational and Environmental Medicine, Lund University, Lund, Sweden
| | - Ian Mudway
- MRC Centre for Environment and Health, Imperial College London, London, UK
- National Institute of Health Protection Research Unit in Environmental Exposures and Health, London, UK
- Asthma UK Centre in Allergic Mechanisms of Asthma, London, UK
| | | | - Michael Shaw
- Department of Chemical and Biological Sciences, National Physical Laboratory, Teddington, UK
- Department of Computer Science, University College London, London, UK
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Lovén K, Gudmundsson A, Assarsson E, Kåredal M, Wierzbicka A, Dahlqvist C, Nordander C, Xu Y, Isaxon C. Effects of cleaning spray use on eyes, airways, and ergonomic load. BMC Public Health 2023; 23:99. [PMID: 36639638 PMCID: PMC9840290 DOI: 10.1186/s12889-022-14954-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 12/27/2022] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Cleaning workers are exposed to chemicals and high physical workload, commonly resulting in airway problems and pain. In this study the response in the upper airways and the physical workload following airborne and ergonomic exposure of cleaning spray was investigated. METHODS A survey was answered by professional cleaning workers to investigate their use of cleaning sprays and the perceived effects on eyes, airways and musculoskeletal pain. A human chamber exposure study was then conducted with 11 professional cleaning workers and 8 non-professional cleaning workers to investigate the airborne exposure, acute effects on eyes and airways, and physical load during cleaning with sprays, foam application and microfiber cloths premoistened with water. All cleaning products used were bleach, chlorine, and ammonia free. The medical assessment included eye and airway parameters, inflammatory markers in blood and nasal lavage, as well as technical recordings of the physical workload. RESULTS A high frequency of spray use (77%) was found among the 225 professional cleaning workers that answered the survey. Based on the survey, there was an eight times higher risk (p < 0.001) of self-experienced symptoms (including symptoms in the nose, eyes and throat, coughing or difficulty breathing) when they used sprays compared to when they cleaned with other methods. During the chamber study, when switching from spray to foam, the airborne particle and volatile organic compound (VOC) concentrations showed a decrease by 7 and 2.5 times, respectively. For the whole group, the peak nasal inspiratory flow decreased (-10.9 L/min, p = 0.01) during spray use compared to using only water-premoistened microfiber cloths. These effects were lower during foam use (-4.7 L/min, p = 0.19). The technical recordings showed a high physical workload regardless of cleaning with spray or with water. CONCLUSION Switching from a spraying to a foaming nozzle decreases the exposure of both airborne particles and VOCs, and thereby reduces eye and airway effects, and does not increase the ergonomic load. If the use of cleaning products tested in this study, i.e. bleach, chlorine, and ammonia free, cannot be avoided, foam application is preferable to spray application to improve the occupational environment.
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Affiliation(s)
- Karin Lovén
- grid.4514.40000 0001 0930 2361Ergonomics and Aerosol Technology, Lund University, Lund, Sweden
| | - Anders Gudmundsson
- grid.4514.40000 0001 0930 2361Ergonomics and Aerosol Technology, Lund University, Lund, Sweden
| | - Eva Assarsson
- grid.4514.40000 0001 0930 2361Occupational and Environmental Medicine, Lund University, Lund, Sweden
| | - Monica Kåredal
- grid.4514.40000 0001 0930 2361Occupational and Environmental Medicine, Lund University, Lund, Sweden
| | - Aneta Wierzbicka
- grid.4514.40000 0001 0930 2361Ergonomics and Aerosol Technology, Lund University, Lund, Sweden
| | - Camilla Dahlqvist
- grid.4514.40000 0001 0930 2361Occupational and Environmental Medicine, Lund University, Lund, Sweden
| | - Catarina Nordander
- grid.4514.40000 0001 0930 2361Occupational and Environmental Medicine, Lund University, Lund, Sweden
| | - Yiyi Xu
- grid.8761.80000 0000 9919 9582Occupational and Environmental Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Christina Isaxon
- grid.4514.40000 0001 0930 2361Ergonomics and Aerosol Technology, Lund University, Lund, Sweden
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Orach J, Rider CF, Yuen ACY, Carlsten C. Concentration-dependent increase in symptoms due to diesel exhaust in a controlled human exposure study. Part Fibre Toxicol 2022; 19:66. [DOI: 10.1186/s12989-022-00506-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 11/14/2022] [Indexed: 11/25/2022] Open
Abstract
Abstract
Background
Traffic-related air pollution (TRAP) exposure causes adverse effects on wellbeing and quality of life, which can be studied non-invasively using self-reported symptoms. However, little is known about the effects of different TRAP concentrations on symptoms following controlled exposures, where acute responses can be studied with limited confounding. We investigated the concentration–response relationship between diesel exhaust (DE) exposure, as a model TRAP, and self-reported symptoms.
Methods
We recruited 17 healthy non-smokers into a double-blind crossover study where they were exposed to filtered air (FA) and DE standardized to 20, 50, 150 µg/m3 PM2.5 for 4 h, with a ≥ 4-week washout between exposures. Immediately before, and at 4 h and 24 h from the beginning of the exposure, we administered visual analog scale (VAS) questionnaires and grouped responses into chest, constitutional, eye, neurological, and nasal categories. Additionally, we assessed how the symptom response was related to exposure perception and airway function.
Results
An increase in DE concentration raised total (β ± standard error = 0.05 ± 0.03, P = 0.04), constitutional (0.01 ± 0.01, P = 0.03) and eye (0.02 ± 0.01, P = 0.05) symptoms at 4 h, modified by perception of temperature, noise, and anxiety. These symptoms were also correlated with airway inflammation. Compared to FA, symptoms were significantly increased at 150 µg/m3 for the total (8.45 ± 3.92, P = 0.04) and eye (3.18 ± 1.55, P = 0.05) categories, with trends towards higher values in the constitutional (1.49 ± 0.86, P = 0.09) and nasal (1.71 ± 0.96, P = 0.08) categories.
Conclusion
DE exposure induced a concentration-dependent increase in symptoms, primarily in the eyes and body, that was modified by environmental perception. These observations emphasize the inflammatory and sensory effects of TRAP, with a potential threshold below 150 µg/m3 PM2.5. We demonstrate VAS questionnaires as a useful tool for health monitoring and provide insight into the TRAP concentration–response at exposure levels relevant to public health policy.
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McNeilly RJ, Schwanekamp JA, Hyder LS, Hatch JP, Edwards BT, Kirsh JA, Jackson JM, Jaworek T, Methner MM, Duran CM. Exposure to lead-free frangible firing emissions containing copper and ultrafine particulates leads to increased oxidative stress in firing range instructors. Part Fibre Toxicol 2022; 19:36. [PMID: 35570273 PMCID: PMC9107651 DOI: 10.1186/s12989-022-00471-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 04/05/2022] [Indexed: 11/10/2022] Open
Abstract
Background Since the introduction of copper based, lead-free frangible (LFF) ammunition to Air Force small arms firing ranges, instructors have reported symptoms including chest tightness, respiratory irritation, and metallic taste. These symptoms have been reported despite measurements determining that instructor exposure does not exceed established occupational exposure limits (OELs). The disconnect between reported symptoms and exposure limits may be due to a limited understanding of LFF firing byproducts and subsequent health effects. A comprehensive characterization of exposure to instructors was completed, including ventilation system evaluation, personal monitoring, symptom tracking, and biomarker analysis, at both a partially enclosed and fully enclosed range. Results Instructors reported symptoms more frequently after M4 rifle classes compared to classes firing only the M9 pistol. Ventilation measurements demonstrated that airflow velocities at the firing line were highly variable and often outside established standards at both ranges. Personal breathing zone air monitoring showed exposure to carbon monoxide, ultrafine particulate, and metals. In general, exposure to instructors was higher at the partially enclosed range compared to the fully enclosed range. Copper measured in the breathing zone of instructors, on rare occasions, approached OELs for copper fume (0.1 mg/m3). Peak carbon monoxide concentrations were 4–5 times higher at the partially enclosed range compared to the enclosed range and occasionally exceeded the ceiling limit (125 ppm). Biological monitoring showed that lung function was maintained in instructors despite respiratory symptoms. However, urinary oxidative stress biomarkers and urinary copper measurements were increased in instructors compared to control groups. Conclusions Consistent with prior work, this study demonstrates that symptoms still occurred despite exposures below OELs. Routine monitoring of symptoms, urinary metals, and oxidative stress biomarkers can help identify instructors who are particularly affected by exposures. These results can assist in guiding protective measures to reduce exposure and protect instructor health. Further, a longitudinal study is needed to determine the long-term health consequences of LFF firing emissions exposure. Supplementary Information The online version contains supplementary material available at 10.1186/s12989-022-00471-0.
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Stockfelt L, Xu Y, Gudmundsson A, Rissler J, Isaxon C, Brunskog J, Pagels J, Nilsson PT, Berglund M, Barregard L, Bohgard M, Albin M, Hagerman I, Wierzbicka A. A controlled chamber study of effects of exposure to diesel exhaust particles and noise on heart rate variability and endothelial function. Inhal Toxicol 2022; 34:159-170. [PMID: 35475948 DOI: 10.1080/08958378.2022.2065388] [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: 11/05/2022]
Abstract
BACKGROUND Adverse cardiovascular effects are associated with both diesel exhaust and road traffic noise, but these exposures are hard to disentangle epidemiologically. We used an experimental setup to evaluate the impact of diesel exhaust particles and traffic noise, alone and combined, on intermediary outcomes related to the autonomic nervous system and increased cardiovascular risk. METHODS In a controlled chamber 18 healthy adults were exposed to four scenarios in a randomized cross-over fashion. Each exposure scenario consisted of either filtered (clean) air or diesel engine exhaust (particle mass concentrations around 300 µg/m3), and either low (46 dB(A)) or high (75 dB(A)) levels of traffic noise for 3 h at rest. ECG was recorded for 10-min periods before and during each exposure type, and frequency-domain heart rate variability (HRV) computed. Endothelial dysfunction and arterial stiffness were assessed after each exposure using EndoPAT 2000. RESULTS Compared to control exposure, HRV in the high frequency band decreased during exposure to diesel exhaust, both alone and combined with noise, but not during noise exposure only. These differences were more pronounced in women. We observed no synergistic effects of combined exposure, and no significant differences between exposure scenarios for other HRV indices, endothelial function or arterial stiffness. CONCLUSION Three-hour exposure to diesel exhaust, but not noise, was associated with decreased HRV in the high frequency band. This indicates activation of irritant receptor-mediated autonomic reflexes, a possible mechanism for the cardiovascular risks of diesel exposure. There was no effect on endothelial dysfunction or arterial stiffness after exposure.
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Affiliation(s)
- Leo Stockfelt
- Occupational and Environmental Medicine, School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Yiyi Xu
- Occupational and Environmental Medicine, School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Anders Gudmundsson
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
| | - Jenny Rissler
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden.,Bioeconomy and Health, RISE Research Institutes of Sweden, Lund, Sweden
| | - Christina Isaxon
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
| | - Jonas Brunskog
- Department of Electrical Engineering, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Joakim Pagels
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
| | - Patrik T Nilsson
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
| | - Margareta Berglund
- Department of Cardiology, Karolinska Institute, Karolinska University Hospital, Huddinge, Sweden
| | - Lars Barregard
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Mats Bohgard
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
| | - Maria Albin
- Division of Occupational and Environmental Medicine, Lund University, Lund, Sweden.,Unit of Occupational Medicine, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Inger Hagerman
- Department of Cardiology, Karolinska Institute, Karolinska University Hospital, Huddinge, Sweden
| | - Aneta Wierzbicka
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
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10
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Silveira AC, Hasegawa JS, Cruz R, Matsuda M, Marquezini MV, Lima-Silva AE, Giles LV, Saldiva PHN, Koehle MS, Bertuzzi R. Effects of air pollution exposure on inflammatory and endurance performance in recreationally trained cyclists adapted to traffic-related air pollution. Am J Physiol Regul Integr Comp Physiol 2022; 322:R562-R570. [PMID: 35411800 DOI: 10.1152/ajpregu.00305.2021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of the present study was to analyze the effects of traffic-related air pollution (TRAP) on markers of inflammatory, neuroplasticity, and endurance performance-related parameters in recreationally trained cyclists who were adapted to TRAP during a 50-km cycling time-trial (50-km cycling TT). Ten male cyclists performed a 50-km cycling TT inside an environmental chamber located in downtown Sao Paulo (Brazil), under TRAP or filtered air conditions. Blood samples were obtained before and after the 50-km cycling TT to measure markers of inflammatory [interleukin-6 (IL-6), C-Reactive protein (CRP), interleukin-10 (IL-10), intercellular adhesion molecule-1 (ICAM-1)], and neuroplasticity [brain-derived neurotrophic factor (BDNF)]. Rating of perceived exertion (RPE), heart rate (HR), and power output (PO) were measured throughout the 50-km cycling TT. There were no significant differences between experimental conditions for responses of IL-6, CRP and IL-10 (P > 0.05). When compared with exercise-induced changes in filtered air condition, TRAP provoked greater exercise-induced increase in BDNF levels (TRAP = 3.3 ± 2.4 fold change; Filtered = 1.3 ± 0.5 fold change; P = 0.04) and lower exercise-induced increase in ICAM-1 (Filtered = 1.1 ± 0.1 fold change; TRAP = 1.0 ± 0.1 fold change; P = 0.01). The endurance performance-related parameters (RPE, HR, PO, and time to complete the 50-km cycling TT) were not different between TRAP and filtered air conditions (P > 0.05). These findings suggest that the potential negative impacts of exposure to pollution on inflammatory, neuroplasticity, and performance-related parameters do not occur in recreationally trained cyclists who are adapted to TRAP.
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Affiliation(s)
- André Casanova Silveira
- Endurance Performance Research Group (GEDAE-USP), School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil
| | - Julio Satoshi Hasegawa
- Endurance Performance Research Group (GEDAE-USP), School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil
| | - Ramon Cruz
- Endurance Performance Research Group (GEDAE-USP), School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil.,Sports Center, Department of Physical Education, Federal University of Santa Catarina, Florianopolis, SC, Brazi
| | - Monique Matsuda
- Laboratory of Investigation in Ophthalmology (LIM-33), Division of Ophthalmology, University of Sao Paulo Faculty of Medicine, Sao Paulo, Brazil
| | - Monica V Marquezini
- Pro - Sangue Foundation, Sao Paulo and Pathology Department, University of Sao Paulo Faculty of Medicine, Sao Paulo, Brazil
| | - Adriano E Lima-Silva
- Human Performance Research Group, Academic Department of Physical Education (DAEFI), Federal University of Technology Parana, Curitiba, PR, Brazil
| | - Luisa V Giles
- School of Kinesiology, Faculty of Health Sciences, University of the Fraser Valley (UFV), British Columbia, Canada
| | - Paulo H N Saldiva
- Institute of Advanced Studies, University of Sao Paulo, Sao Paulo, Brazil
| | | | - Romulo Bertuzzi
- Endurance Performance Research Group (GEDAE-USP), School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil
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11
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Underground emissions and miners' personal exposure to diesel and renewable diesel exhaust in a Swedish iron ore mine. Int Arch Occup Environ Health 2022; 95:1369-1388. [PMID: 35294627 PMCID: PMC9273542 DOI: 10.1007/s00420-022-01843-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 02/09/2022] [Indexed: 11/10/2022]
Abstract
Purpose Underground diesel exhaust exposure is an occupational health risk. It is not known how recent intensified emission legislation and use of renewable fuels have reduced or altered occupational exposures. We characterized these effects on multipollutant personal exposure to diesel exhaust and underground ambient air concentrations in an underground iron ore mine. Methods Full-shift personal sampling (12 workers) of elemental carbon (EC), nitrogen dioxide (NO2), polycyclic aromatic hydrocarbons (PAHs), and equivalent black carbon (eBC) was performed. The study used and validated eBC as an online proxy for occupational exposure to EC. Ambient air sampling of these pollutants and particle number size distribution and concentration were performed in the vicinity of the workers. Urine samples (27 workers) were collected after 8 h exposure and analyzed for PAH metabolites and effect biomarkers (8-oxodG for DNA oxidative damage, 4-HNE-MA for lipid peroxidation, 3-HPMA for acrolein). Results The personal exposures (geometric mean; GM) of the participating miners were 7 µg EC m−3 and 153 µg NO2 m−3, which are below the EU occupational exposure limits. However, exposures up to 94 µg EC m−3 and 1200 µg NO2 m−3 were observed. There was a tendency that the operators of vehicles complying with sharpened emission legislation had lower exposure of EC. eBC and NO2 correlated with EC, R = 0.94 and R = 0.66, respectively. No correlation was found between EC and the sum of 16 priority PAHs (GM 1790 ng m−3). Ratios between personal exposures and ambient concentrations were similar and close to 1 for EC and NO2, but significantly higher for PAHs. Semi-volatile PAHs may not be effectively reduced by the aftertreatment systems, and ambient area sampling did not predict the personal airborne PAHs exposure well, neither did the slightly elevated concentration of urinary PAH metabolites correlate with airborne PAH exposure. Conclusion Miners’ exposures to EC and NO2 were lower than those in older studies indicating the effect of sharpened emission legislation and new technologies. Using modern vehicles with diesel particulate filter (DPF) may have contributed to the lower ambient underground PM concentration and exposures. The semi-volatile behavior of the PAHs might have led to inefficient removal in the engines aftertreatment systems and delayed removal by the workplace ventilation system due to partitioning to indoor surfaces. The results indicate that secondary emissions can be an important source of gaseous PAH exposure in the mine. Supplementary Information The online version contains supplementary material available at 10.1007/s00420-022-01843-x.
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12
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Long E, Schwartz C, Carlsten C. Controlled human exposure to diesel exhaust: a method for understanding health effects of traffic-related air pollution. Part Fibre Toxicol 2022; 19:15. [PMID: 35216599 PMCID: PMC8876178 DOI: 10.1186/s12989-022-00454-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 02/03/2022] [Indexed: 12/17/2022] Open
Abstract
Diesel exhaust (DE) is a major component of air pollution in urban centers. Controlled human exposure (CHE) experiments are commonly used to investigate the acute effects of DE inhalation specifically and also as a paradigm for investigating responses to traffic-related air pollution (TRAP) more generally. Given the critical role this model plays in our understanding of TRAP’s health effects mechanistically and in support of associated policy and regulation, we review the methodology of CHE to DE (CHE–DE) in detail to distill critical elements so that the results of these studies can be understood in context. From 104 eligible publications, we identified 79 CHE–DE studies and extracted information on DE generation, exposure session characteristics, pollutant and particulate composition of exposures, and participant demographics. Virtually all studies had a crossover design, and most studies involved a single DE exposure per participant. Exposure sessions were typically 1 or 2 h in duration, with participants alternating between exercise and rest. Most CHE–DE targeted a PM concentration of 300 μg/m3. There was a wide range in commonly measured co-pollutants including nitrogen oxides, carbon monoxide, and total organic compounds. Reporting of detailed parameters of aerosol composition, including particle diameter, was inconsistent between studies, and older studies from a given lab were often cited in lieu of repeating measurements for new experiments. There was a male predominance in participants, and over half of studies involved healthy participants only. Other populations studied include those with asthma, atopy, or metabolic syndrome. Standardization in reporting exposure conditions, potentially using current versions of engines with modern emissions control technology, will allow for more valid comparisons between studies of CHE–DE, while recognizing that diesel engines in much of the world remain old and heterogeneous. Inclusion of female participants as well as populations more susceptible to TRAP will broaden the applicability of results from CHE–DE studies.
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Affiliation(s)
- Erin Long
- Faculty of Medicine, University of British Columbia, 317 - 2194 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Carley Schwartz
- Department of Medicine, Division of Respiratory Medicine, University of British Columbia, 2775 Laurel Street 7th Floor, Vancouver, BC, V5Z 1M9, Canada
| | - Christopher Carlsten
- Department of Medicine, Division of Respiratory Medicine, University of British Columbia, 2775 Laurel Street 7th Floor, Vancouver, BC, V5Z 1M9, Canada.
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13
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Jha AK, Gairola S, Kundu S, Doye P, Syed AM, Ram C, Kulhari U, Kumar N, Murty US, Sahu BD. Biological Activities, Pharmacokinetics and Toxicity of Nootkatone: A Review. Mini Rev Med Chem 2022; 22:2244-2259. [DOI: 10.2174/1389557522666220214092005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 10/25/2021] [Accepted: 12/16/2021] [Indexed: 11/22/2022]
Abstract
Abstract:
Plant-based drugs have a significant impact on modern therapeutics due to their vast array of pharmacological activities. The integration of herbal plants in the current healthcare system has emerged as a new field of research. It can be used for the identification of novel lead compound candidates for future drug development. Nootkatone is a sesquiterpene derivative and an isolate of grapefruit. Shreds of evidence illustrate that nootkatone targets few molecular mechanisms to exhibit its pharmacological activity and yet needs more exploration to be established. The current review is related to nootkatone, drafted through a literature search using research articles and books from different sources, including Science Direct, Google Scholar, Elsevier, PubMed, and Scopus. It has been reported to possess a wide range of pharmacological activities such as anti-inflammatory, anticancer, antibacterial, hepatoprotective, neuroprotective, and cardioprotective. Although preclinical studies in experimental animal models suggest that nootkatone has therapeutic potential, it is further warranted to evaluate its toxicity and pharmacokinetic parameters before being applied to humans. Hence in the present review, we have summarized the scientific knowledge on nootkatone with a particular emphasis on its pharmacological properties to encourage researchers for further exploration in preclinical and clinical settings.
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Affiliation(s)
- Ankush Kumar Jha
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, PIN-781101, Assam, India
| | - Shobhit Gairola
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, PIN-781101, Assam, India
| | - Sourav Kundu
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, PIN-781101, Assam, India
| | - Pakpi Doye
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, PIN-781101, Assam, India
| | - Abu Mohammad Syed
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, PIN-781101, Assam, India
| | - Chetan Ram
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, PIN-781101, Assam, India
| | - Uttam Kulhari
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, PIN-781101, Assam, India
| | - Naresh Kumar
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, PIN-781101, Assam, India
| | - Upadhyayula Suryanarayana Murty
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, PIN-781101, Assam, India
| | - Bidya Dhar Sahu
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Guwahati, Changsari, PIN-781101, Assam, India
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14
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Long E, Carlsten C. Controlled human exposure to diesel exhaust: results illuminate health effects of traffic-related air pollution and inform future directions. Part Fibre Toxicol 2022; 19:11. [PMID: 35139881 PMCID: PMC8827176 DOI: 10.1186/s12989-022-00450-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 01/31/2022] [Indexed: 12/03/2022] Open
Abstract
Air pollution is an issue of increasing interest due to its globally relevant impacts on morbidity and mortality. Controlled human exposure (CHE) studies are often employed to investigate the impacts of pollution on human health, with diesel exhaust (DE) commonly used as a surrogate of traffic related air pollution (TRAP). This paper will review the results derived from 104 publications of CHE to DE (CHE-DE) with respect to health outcomes. CHE-DE studies have provided mechanistic evidence supporting TRAP’s detrimental effects on related to the cardiovascular system (e.g., vasomotor dysfunction, inhibition of fibrinolysis, and impaired cardiac function) and respiratory system (e.g., airway inflammation, increased airway responsiveness, and clinical symptoms of asthma). Oxidative stress is thought to be the primary mechanism of TRAP-induced effects and has been supported by several CHE-DE studies. A historical limitation of some air pollution research is consideration of TRAP (or its components) in isolation, limiting insight into the interactions between TRAP and other environmental factors often encountered in tandem. CHE-DE studies can help to shed light on complex conditions, and several have included co-exposure to common elements such as allergens, ozone, and activity level. The ability of filters to mitigate the adverse effects of DE, by limiting exposure to the particulate fraction of polluted aerosols, has also been examined. While various biomarkers of DE exposure have been evaluated in CHE-DE studies, a definitive such endpoint has yet to be identified. In spite of the above advantages, this paradigm for TRAP is constrained to acute exposures and can only be indirectly applied to chronic exposures, despite the critical real-world impact of living long-term with TRAP. Those with significant medical conditions are often excluded from CHE-DE studies and so results derived from healthy individuals may not apply to more susceptible populations whose further study is needed to avoid potentially misleading conclusions. In spite of limitations, the contributions of CHE-DE studies have greatly advanced current understanding of the health impacts associated with TRAP exposure, especially regarding mechanisms therein, with important implications for regulation and policy.
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Affiliation(s)
- Erin Long
- Faculty of Medicine, University of British Columbia, 317 - 2194 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Christopher Carlsten
- Division of Respiratory Medicine, Department of Medicine, University of British Columbia, 2775 Laurel Street 7th Floor, Vancouver, BC, V5Z 1M9, Canada.
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15
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Syed N, Ryu MH, Dhillon S, Schaeffer MR, Ramsook AH, Leung JM, Ryerson CJ, Carlsten C, Guenette JA. Effects of traffic-related air pollution on exercise endurance, dyspnea and cardiorespiratory physiology in health and COPD - A randomized, placebo-controlled crossover trial. Chest 2021; 161:662-675. [PMID: 34699772 DOI: 10.1016/j.chest.2021.10.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 09/22/2021] [Accepted: 10/02/2021] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Individuals with COPD have increased sensitivity to traffic-related air pollution (TRAP) such as diesel exhaust (DE), but little is known about the acute effects of TRAP on exercise responses in COPD. RESEARCH QUESTION Does pre-exercise exposure to TRAP (DE300, PM2.5=300 μg/m3) have greater adverse effects on exercise endurance, exertional dyspnea, and cardiorespiratory responses to exercise in participants with mild-to-moderate COPD compared to former smokers with normal spirometry and healthy controls? STUDY DESIGN AND METHODS In this double-blind, randomized, placebo-controlled, crossover study, 11 healthy never-smokers, 9 ex-smokers without COPD and 9 ex-smokers with COPD were separately exposed to filtered air (FA) and DE300 for 2 hours separated by a minimum of 4 weeks. Participants performed symptom limited constant load cycling tests within 2.5 hours of exposure with detailed cardiorespiratory and exertional symptom measurements. RESULTS There was a significant negative effect of TRAP on exercise endurance time in healthy controls (DE300 vs. FA: 10.2±8.2 vs. 12.9±9.5 min, respectively; p=0.03), but not in ex-smokers without COPD (10.1±6.9 vs. 12.2±8.0 min; respectively, p=0.57) or ex-smokers with COPD (9.8±6.4 vs. 8.4±6.6 min, respectively, p=0.31). Furthermore, significant increases in inspiratory duty cycle and absolute end-expiratory and end-inspiratory lung volumes were observed, and dyspnea ratings were elevated at select submaximal measurement times only in healthy controls. INTERPRETATION: Contrary to our hypothesis, it was the healthy controls rather than the ex-smokers with and without COPD that were negatively impacted by TRAP during exercise.
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Affiliation(s)
- Nafeez Syed
- Centre for Heart Lung Innovation, The University of British Columbia, St. Paul's Hospital, Vancouver, BC, Canada; Department of Physical Therapy, The University of British Columbia, Vancouver, BC, Canada
| | - Min Hyung Ryu
- Centre for Heart Lung Innovation, The University of British Columbia, St. Paul's Hospital, Vancouver, BC, Canada; Department of Medicine, The University of British Columbia, Vancouver, BC, Canada
| | - Satvir Dhillon
- Centre for Heart Lung Innovation, The University of British Columbia, St. Paul's Hospital, Vancouver, BC, Canada
| | - Michele R Schaeffer
- Centre for Heart Lung Innovation, The University of British Columbia, St. Paul's Hospital, Vancouver, BC, Canada; Department of Physical Therapy, The University of British Columbia, Vancouver, BC, Canada
| | - Andrew H Ramsook
- Centre for Heart Lung Innovation, The University of British Columbia, St. Paul's Hospital, Vancouver, BC, Canada; Department of Physical Therapy, The University of British Columbia, Vancouver, BC, Canada
| | - Janice M Leung
- Centre for Heart Lung Innovation, The University of British Columbia, St. Paul's Hospital, Vancouver, BC, Canada; Department of Medicine, The University of British Columbia, Vancouver, BC, Canada
| | - Christopher J Ryerson
- Centre for Heart Lung Innovation, The University of British Columbia, St. Paul's Hospital, Vancouver, BC, Canada; Department of Medicine, The University of British Columbia, Vancouver, BC, Canada
| | - Christopher Carlsten
- Centre for Heart Lung Innovation, The University of British Columbia, St. Paul's Hospital, Vancouver, BC, Canada; Department of Medicine, The University of British Columbia, Vancouver, BC, Canada
| | - Jordan A Guenette
- Centre for Heart Lung Innovation, The University of British Columbia, St. Paul's Hospital, Vancouver, BC, Canada; Department of Physical Therapy, The University of British Columbia, Vancouver, BC, Canada.
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16
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Scholten RH, Essig YJ, Roursgaard M, Jensen A, Krais AM, Gren L, Dierschke K, Gudmundsson A, Wierzbicka A, Møller P. Inhalation of hydrogenated vegetable oil combustion exhaust and genotoxicity responses in humans. Arch Toxicol 2021; 95:3407-3416. [PMID: 34468814 DOI: 10.1007/s00204-021-03143-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 08/19/2021] [Indexed: 10/20/2022]
Abstract
Biofuels from vegetable oils or animal fats are considered to be more sustainable than petroleum-derived diesel fuel. In this study, we have assessed the effect of hydrogenated vegetable oil (HVO) exhaust on levels of DNA damage in peripheral blood mononuclear cells (PBMCs) as primary outcome, and oxidative stress and inflammation as mediators of genotoxicity. In a randomized cross-over study, healthy humans were exposed to filtered air, inorganic salt particles, exhausts from combustion of HVO in engines with aftertreatment [i.e. emission with nitrogen oxides and low amounts of particulate matter less than 2.5 µm (approximately 1 µg/m3)], or without aftertreatment (i.e. emission with nitrogen oxides and 93 ± 13 µg/m3 of PM2.5). The subjects were exposed for 3 h and blood samples were collected before, within 1 h after the exposure and 24 h after. None of the exposures caused generation of DNA strand breaks and oxidatively damaged DNA, or affected gene expression of factors related to DNA repair (Ogg1), antioxidant defense (Hmox1) or pro-inflammatory cytokines (Ccl2, Il8 and Tnfa) in PBMCs. The results from this study indicate that short-term HVO exhaust exposure is not associated with genotoxic hazard in humans.
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Affiliation(s)
- Rebecca Harnung Scholten
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Copenhagen K, Denmark
| | - Yona J Essig
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Martin Roursgaard
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Copenhagen K, Denmark
| | - Annie Jensen
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Copenhagen K, Denmark
| | - Annette M Krais
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Louise Gren
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Box 118, 22100, Lund, Sweden
| | - Katrin Dierschke
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Anders Gudmundsson
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Box 118, 22100, Lund, Sweden
| | - Aneta Wierzbicka
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Box 118, 22100, Lund, Sweden
| | - Peter Møller
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Copenhagen K, Denmark.
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17
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Martin WK, Padilla S, Kim YH, Hunter DL, Hays MD, DeMarini DM, Hazari MS, Gilmour MI, Farraj AK. Zebrafish irritant responses to wildland fire-related biomass smoke are influenced by fuel type, combustion phase, and byproduct chemistry. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2021; 84:674-688. [PMID: 34006202 PMCID: PMC8237130 DOI: 10.1080/15287394.2021.1925608] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Human exposure to wildfire-derived particulate matter (PM) is linked to adverse health outcomes; however, little is known regarding the influence of biomass fuel type and burn conditions on toxicity. The aim of this study was to assess the irritant potential of extractable organic material (EOM) of biomass smoke condensates from five fuels (eucalyptus, pine, pine needle, peat, or red oak), representing various fire-prone regions of the USA, burned at two temperatures each [flaming (approximately 640°C) or (smoldering approximately 500°C)] using a locomotor assay in zebrafish (Danio rerio) larvae. It was postulated that locomotor responses, as measures of irritant effects, might be dependent upon fuel type and burn conditions and that these differences relate to combustion byproduct chemistry. To test this, locomotor activity was tracked for 60 min in 6-day-old zebrafish larvae (25-32/group) immediately after exposure to 0.4% dimethyl sulfoxide (DMSO) vehicle or EOM from the biomass smoke condensates (0.3-30 µg EOM/ml; half-log intervals). All EOM samples produced concentration-dependent irritant responses. Linear regression analysis to derive rank-order potency indicated that on a µg PM basis, flaming pine and eucalyptus were the most irritating. In contrast, on an emission-factor basis, which normalizes responses to the amount of PM produced/kg of fuel burned, smoldering smoke condensates induced greater irritant responses (>100-fold) than flaming smoke condensates, with smoldering pine being the most potent. Importantly, irritant responses significantly correlated with polycyclic aromatic hydrocarbon (PAH) content, but not with organic carbon or methoxyphenols. Data indicate that fuel type and burn condition influence the quantity and chemical composition of PM as well as toxicity.
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Affiliation(s)
- W Kyle Martin
- Curriculum in Toxicology and Environmental Medicine, UNC-Chapel Hill, USA
| | - S Padilla
- Biomolecular and Computational Toxicology Division, Us Epa, Rtp, NC, US
| | - Y H Kim
- Center for Environmental Medicine, Asthma and Lung Biology, University of North Carolina, Chapel Hill, NC, US
| | - D L Hunter
- Biomolecular and Computational Toxicology Division, Us Epa, Rtp, NC, US
| | - M D Hays
- Air Methods & Characterization Division, Us Epa, Rtp, NC, US
| | - D M DeMarini
- Biomolecular and Computational Toxicology Division, Us Epa, Rtp, NC, US
| | - M S Hazari
- Public Health and Integrated Toxicology Division, Us Epa, Rtp, NC, US
| | - M I Gilmour
- Public Health and Integrated Toxicology Division, Us Epa, Rtp, NC, US
| | - A K Farraj
- Public Health and Integrated Toxicology Division, Us Epa, Rtp, NC, US
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18
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Wang Z, Xu M, Wang Y, Wang T, Wu N, Zheng W, Duan H. Air particulate matter pollution and circulating surfactant protein: A systemic review and meta-analysis. CHEMOSPHERE 2021; 272:129564. [PMID: 33476792 DOI: 10.1016/j.chemosphere.2021.129564] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 12/28/2020] [Accepted: 01/03/2021] [Indexed: 06/12/2023]
Abstract
OBJECTIVE Air particulate matter (PM) pollution is associated with the alterations in circulating pulmonary damage proteins. But there are not consistent results among the epidemiological studies. The aim of this study is to investigate the alteration of surfactant protein (SP) from PM exposure. METHODS We conducted a comprehensive meta-analysis by searching the databases of PubMed, Medline, EMBASE, Web of Science and CNKI before October 2020 which reported PM pollutants and surfactant protein in the population. The sources of heterogeneity were assessed by subgroup (smoking, particulate matter with different aerodynamic diameter, exposure duration) analysis. We also used the publication bias tests for the comprehensive assessment. RESULTS This meta-analysis consisted of 10 studies with 1985 subjects. The results showed that the combined standardized mean difference (SMD) value was 0.05, 95% confidence interval (CI) was -0.07 to 0.17 for serum SP-A and -0.81 (95% CI: -1.41 to -0.21) for circulating SP-D. Among smokers, the combined SMD value of SP-A were 0.29 (95% CI: 0.05 to 0.52). We did not find the correlation between publication year of SP-A and SP-D and study heterogeneity. CONCLUSIONS Circulating SP-D was significantly decreased by air particulate matter. Serum SP-A was significantly increased by PM exposure among smokers. Circulating surfactant protein may be considered as a biomarker for respiratory injury caused by air particulate matter.
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Affiliation(s)
- Zhenjie Wang
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Mengmeng Xu
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Yanhua Wang
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Ting Wang
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Nan Wu
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Wenjing Zheng
- Office of Epidemiology, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Huawei Duan
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China.
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Cattani-Cavalieri I, da Maia Valença H, Moraes JA, Brito-Gitirana L, Romana-Souza B, Schmidt M, Valença SS. Dimethyl Fumarate Attenuates Lung Inflammation and Oxidative Stress Induced by Chronic Exposure to Diesel Exhaust Particles in Mice. Int J Mol Sci 2020; 21:ijms21249658. [PMID: 33352854 PMCID: PMC7767202 DOI: 10.3390/ijms21249658] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 12/13/2020] [Accepted: 12/17/2020] [Indexed: 12/19/2022] Open
Abstract
Air pollution is mainly caused by burning of fossil fuels, such as diesel, and is associated with increased morbidity and mortality due to adverse health effects induced by inflammation and oxidative stress. Dimethyl fumarate (DMF) is a fumaric acid ester and acts as an antioxidant and anti-inflammatory agent. We investigated the potential therapeutic effects of DMF on pulmonary damage caused by chronic exposure to diesel exhaust particles (DEPs). Mice were challenged with DEPs (30 μg per mice) by intranasal instillation for 60 consecutive days. After the first 30 days, the animals were treated daily with 30 mg/kg of DMF by gavage for the remainder of the experimental period. We demonstrated a reduction in total inflammatory cell number in the bronchoalveolar lavage (BAL) of mice subjected to DEP + DMF as compared to those exposed to DEPs alone. Importantly, DMF treatment was able to reduce lung injury caused by DEP exposure. Intracellular total reactive oxygen species (ROS), peroxynitrite (OONO), and nitric oxide (NO) levels were significantly lower in the DEP + DMF than in the DEP group. In addition, DMF treatment reduced the protein expression of kelch-like ECH-associated protein 1 (Keap-1) in lung lysates from DEP-exposed mice, whereas total nuclear factor κB (NF-κB) p65 expression was decreased below baseline in the DEP + DMF group compared to both the control and DEP groups. Lastly, DMF markedly reduced DEP-induced expression of nitrotyrosine, glutathione peroxidase-1/2 (Gpx-1/2), and catalase in mouse lungs. In summary, DMF treatment effectively reduced lung injury, inflammation, and oxidative and nitrosative stress induced by chronic DEP exposure. Consequently, it may lead to new therapies to diminish lung injury caused by air pollutants.
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Affiliation(s)
- Isabella Cattani-Cavalieri
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21044-020, Brazil; (I.C.-C.); (H.d.M.V.); (J.A.M.); (L.B.-G.); (S.S.V.)
- Department of Molecular Pharmacology, University of Groningen, 9700 Groningen, The Netherlands
- University Medical Center Groningen, Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, 9700 Groningen, The Netherlands
| | - Helber da Maia Valença
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21044-020, Brazil; (I.C.-C.); (H.d.M.V.); (J.A.M.); (L.B.-G.); (S.S.V.)
| | - João Alfredo Moraes
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21044-020, Brazil; (I.C.-C.); (H.d.M.V.); (J.A.M.); (L.B.-G.); (S.S.V.)
| | - Lycia Brito-Gitirana
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21044-020, Brazil; (I.C.-C.); (H.d.M.V.); (J.A.M.); (L.B.-G.); (S.S.V.)
| | - Bruna Romana-Souza
- Department of Histology and Embryology, Rio de Janeiro State University, Rio de Janeiro 20943-000, Brazil;
| | - Martina Schmidt
- University Medical Center Groningen, Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, 9700 Groningen, The Netherlands
- Correspondence: ; Tel.: +31-50-363-3322
| | - Samuel Santos Valença
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21044-020, Brazil; (I.C.-C.); (H.d.M.V.); (J.A.M.); (L.B.-G.); (S.S.V.)
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20
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Miller MR, Poland CA. Nanotoxicology: The Need for a Human Touch? SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2001516. [PMID: 32697439 DOI: 10.1002/smll.202001516] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 04/28/2020] [Indexed: 06/11/2023]
Abstract
With the ever-expanding number of manufactured nanomaterials (MNMs) under development there is a vital need for nanotoxicology studies that test the potential for MNMs to cause harm to health. An extensive body of work in cell cultures and animal models is vital to understanding the physicochemical characteristics of MNMs and the biological mechanisms that underlie any detrimental actions to cells and organs. In human subjects, exposure monitoring is combined with measurement of selected health parameters in small panel studies, especially in occupational settings. However, the availability of further in vivo human data would greatly assist the risk assessment of MNMs. Here, the potential for controlled inhalation exposures of MNMs in human subjects is discussed. Controlled exposures to carbon, gold, aluminum, and zinc nanoparticles in humans have already set a precedence to demonstrate the feasibility of this approach. These studies have provided considerable insight into the potential (or not) of nanoparticles to induce inflammation, alter lung function, affect the vasculature, reach the systemic circulation, and accumulate in other organs. The need for further controlled exposures of MNMs in human volunteers - to establish no-effect limits, biological mechanisms, and provide vital data for the risk assessment of MNMs - is advocated.
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Affiliation(s)
- Mark R Miller
- University/BHF Centre for Cardiovascular Science, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Craig A Poland
- Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
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21
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Nanodomains in cardiopulmonary disorders and the impact of air pollution. Biochem Soc Trans 2020; 48:799-811. [PMID: 32597478 PMCID: PMC7329344 DOI: 10.1042/bst20190250] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 06/04/2020] [Accepted: 06/09/2020] [Indexed: 12/29/2022]
Abstract
Air pollution is a major environmental threat and each year about 7 million people reported to die as a result of air pollution. Consequently, exposure to air pollution is linked to increased morbidity and mortality world-wide. Diesel automotive engines are a major source of urban air pollution in the western societies encompassing particulate matter and diesel exhaust particles (DEP). Air pollution is envisioned as primary cause for cardiovascular dysfunction, such as ischemic heart disease, cardiac dysrhythmias, heart failure, cerebrovascular disease and stroke. Air pollution also causes lung dysfunction, such as chronic obstructive pulmonary disease (COPD), asthma, idiopathic pulmonary fibrosis (IPF), and specifically exacerbations of these diseases. DEP induces inflammation and reactive oxygen species production ultimately leading to mitochondrial dysfunction. DEP impair structural cell function and initiate the epithelial-to-mesenchymal transition, a process leading to dysfunction in endothelial as well as epithelial barrier, hamper tissue repair and eventually leading to fibrosis. Targeting cyclic adenosine monophosphate (cAMP) has been implicated to alleviate cardiopulmonary dysfunction, even more intriguingly cAMP seems to emerge as a potent regulator of mitochondrial metabolism. We propose that targeting of the mitochondrial cAMP nanodomain bear the therapeutic potential to diminish air pollutant — particularly DEP — induced decline in cardiopulmonary function.
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22
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Zhang L, Duan H, Zheng X, Bin P, Zheng Y. C-Reactive Protein Gene Polymorphisms Correlated with Serum CRP Levels of Diesel Engine Exhaust-Exposed Workers. Health (London) 2020. [DOI: 10.4236/health.2020.126047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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A multi-scale approach to study biochemical and biophysical aspects of resveratrol on diesel exhaust particle-human primary lung cell interaction. Sci Rep 2019; 9:18178. [PMID: 31796766 PMCID: PMC6890693 DOI: 10.1038/s41598-019-54552-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 11/14/2019] [Indexed: 12/15/2022] Open
Abstract
Diesel exhaust particles (DEPs) are major air pollutants that lead to numerous human disorders, especially pulmonary diseases, partly through the induction of oxidative stress. Resveratrol is a polyphenol that ameliorates the production of reactive oxygen species (ROS) and delays aging-related processes. Herein we studied the cytoprotective effect of resveratrol on DEP-exposed human lung cells in a factorial experimental design. This work investigates biophysical features including cellular compositions and biomechanical properties, which were measured at the single-cell level using confocal Raman microspectroscopy (RM) and atomic force microscopy (AFM), respectively. Principal component analysis (PCA), hierarchical cluster analysis (HCA) and partial least square regression (PLS) analysis were applied to analyze Raman spectra with and without resveratrol protection. The health status of individual cells could be effectively predicted using an index derived from characteristic Raman spectral peak (e.g., 1006 cm−1) based on PLS model. AFM measurements indicated that cellular adhesion force was greatly reduced, while Young’s modulus was highly elevated in resveratrol treated DEP-exposed cells. Anti-oxidant resveratrol reduced DEP-induced ROS production and suppressed releases of several cytokines and chemokines. These findings suggest resveratrol may enhance resistance of human lung cells (e.g., SAEC) to air pollutants (e.g. DEPs).
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24
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Andersen MHG, Frederiksen M, Saber AT, Wils RS, Fonseca AS, Koponen IK, Johannesson S, Roursgaard M, Loft S, Møller P, Vogel U. Health effects of exposure to diesel exhaust in diesel-powered trains. Part Fibre Toxicol 2019; 16:21. [PMID: 31182122 PMCID: PMC6558821 DOI: 10.1186/s12989-019-0306-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 05/16/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Short-term controlled exposure to diesel exhaust (DE) in chamber studies have shown mixed results on lung and systemic effects. There is a paucity of studies on well-characterized real-life DE exposure in humans. In the present study, 29 healthy volunteers were exposed to DE while sitting as passengers in diesel-powered trains. Exposure in electric trains was used as control scenario. Each train scenario consisted of three consecutive days (6 h/day) ending with biomarker samplings. RESULTS Combustion-derived air pollutants were considerably higher in the passenger carriages of diesel trains compared with electric trains. The concentrations of black carbon and ultrafine particles were 8.5 μg/m3 and 1.2-1.8 × 105 particles/cm3 higher, respectively, in diesel as compared to electric trains. Net increases of NOx and NO2 concentrations were 317 μg/m3 and 36 μg/m3. Exposure to DE was associated with reduced lung function and increased levels of DNA strand breaks in peripheral blood mononuclear cells (PBMCs), whereas there were unaltered levels of oxidatively damaged DNA, soluble cell adhesion molecules, acute phase proteins in blood and urinary excretion of metabolites of polycyclic aromatic hydrocarbons. Also the microvascular function was unaltered. An increase in the low frequency of heart rate variability measures was observed, whereas time-domain measures were unaltered. CONCLUSION Exposure to DE inside diesel-powered trains for 3 days was associated with reduced lung function and systemic effects in terms of altered heart rate variability and increased levels of DNA strand breaks in PBMCs compared with electric trains. TRIAL REGISTRATION ClinicalTrials.Gov ( NCT03104387 ). Registered on March 23rd 2017.
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Affiliation(s)
- Maria Helena Guerra Andersen
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Øster Farimagsgade 5A, DK-1014, Copenhagen K, Denmark. .,The National Research Centre for the Working Environment, Lersø Parkalle 105, DK-2100, Copenhagen Ø, Denmark.
| | - Marie Frederiksen
- The National Research Centre for the Working Environment, Lersø Parkalle 105, DK-2100, Copenhagen Ø, Denmark
| | - Anne Thoustrup Saber
- The National Research Centre for the Working Environment, Lersø Parkalle 105, DK-2100, Copenhagen Ø, Denmark
| | - Regitze Sølling Wils
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Øster Farimagsgade 5A, DK-1014, Copenhagen K, Denmark.,The National Research Centre for the Working Environment, Lersø Parkalle 105, DK-2100, Copenhagen Ø, Denmark
| | - Ana Sofia Fonseca
- The National Research Centre for the Working Environment, Lersø Parkalle 105, DK-2100, Copenhagen Ø, Denmark
| | - Ismo K Koponen
- The National Research Centre for the Working Environment, Lersø Parkalle 105, DK-2100, Copenhagen Ø, Denmark
| | - Sandra Johannesson
- Department of Occupational and Environmental Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - Martin Roursgaard
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Øster Farimagsgade 5A, DK-1014, Copenhagen K, Denmark
| | - Steffen Loft
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Øster Farimagsgade 5A, DK-1014, Copenhagen K, Denmark
| | - Peter Møller
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Øster Farimagsgade 5A, DK-1014, Copenhagen K, Denmark
| | - Ulla Vogel
- The National Research Centre for the Working Environment, Lersø Parkalle 105, DK-2100, Copenhagen Ø, Denmark.,DTU Health Tech., Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
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25
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Burwell-Naney K, Wilson SM, Whitlock ST, Puett R. Hybrid Resiliency-Stressor Conceptual Framework for Informing Decision Support Tools and Addressing Environmental Injustice and Health Inequities. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E1466. [PMID: 31027209 PMCID: PMC6518295 DOI: 10.3390/ijerph16081466] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 04/19/2019] [Accepted: 04/19/2019] [Indexed: 02/06/2023]
Abstract
While structural factors may drive health inequities, certain health-promoting attributes of one's "place" known as salutogens may further moderate the cumulative impacts of exposures to socio-environmental stressors that behave as pathogens. Understanding the synergistic relationship between socio-environmental stressors and resilience factors is a critical component in reducing health inequities; however, the catalyst for this concept relies on community-engaged research approaches to ultimately strengthen resiliency and promote health. Furthermore, this concept has not been fully integrated into environmental justice and cumulative risk assessment screening tools designed to identify geospatial variability in environmental factors that may be associated with health inequities. As a result, we propose a hybrid resiliency-stressor conceptual framework to inform the development of environmental justice and cumulative risk assessment screening tools that can detect environmental inequities and opportunities for resilience in vulnerable populations. We explore the relationship between actual exposures to socio-environmental stressors, perceptions of stressors, and one's physiological and psychological stress response to environmental stimuli, which collectively may perpetuate health inequities by increasing allostatic load and initiating disease onset. This comprehensive framework expands the scope of existing screening tools to inform action-based solutions that rely on community-engaged research efforts to increase resiliency and promote positive health outcomes.
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Affiliation(s)
- Kristen Burwell-Naney
- Center for Outreach in Alzheimer's, Aging and Community Health, North Carolina A&T State University, 2105 Yanceyville Street, Greensboro, NC 27405, USA.
| | - Sacoby M Wilson
- Maryland Institute for Applied Environmental Health, School of Public Heath, University of Maryland, 255 Valley Drive, College Park, MD 20742, USA.
| | - Siobhan T Whitlock
- Office of Environmental Justice and Sustainability, U.S. Environmental Protection Agency, 61 Forsyth Street SW, Atlanta, GA 30303, USA.
| | - Robin Puett
- Maryland Institute for Applied Environmental Health, School of Public Heath, University of Maryland, 255 Valley Drive, College Park, MD 20742, USA.
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26
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Shukla A, Bunkar N, Kumar R, Bhargava A, Tiwari R, Chaudhury K, Goryacheva IY, Mishra PK. Air pollution associated epigenetic modifications: Transgenerational inheritance and underlying molecular mechanisms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 656:760-777. [PMID: 30530146 DOI: 10.1016/j.scitotenv.2018.11.381] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/23/2018] [Accepted: 11/25/2018] [Indexed: 05/28/2023]
Abstract
Air pollution is one of the leading causes of deaths in Southeast Asian countries including India. Exposure to air pollutants affects vital cellular mechanisms and is intimately linked with the etiology of a number of chronic diseases. Earlier work from our laboratory has shown that airborne particulate matter disturbs the mitochondrial machinery and causes significant damage to the epigenome. Mitochondrial reactive oxygen species possess the ability to trigger redox-sensitive signaling mechanisms and induce irreversible epigenomic changes. The electrophilic nature of reactive metabolites can directly result in deprotonation of cytosine at C-5 position or interfere with the DNA methyltransferases activity to cause alterations in DNA methylation. In addition, it also perturbs level of cellular metabolites critically involved in different epigenetic processes like acetylation and methylation of histone code and DNA hypo or hypermethylation. Interestingly, these modifications may persist through downstream generations and result in the transgenerational epigenomic inheritance. This phenomenon of subsequent transfer of epigenetic modifications is mainly associated with the germ cells and relies on the germline stability of the epigenetic states. Overall, the recent literature supports, and arguably strengthens, the contention that air pollution might contribute to transmission of epimutations from gametes to zygotes by involving mitochondrial DNA, parental allele imprinting, histone withholding and non-coding RNAs. However, larger prospective studies using innovative, integrated epigenome-wide metabolomic strategy are highly warranted to assess the air pollution induced transgenerational epigenetic inheritance and associated human health effects.
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Affiliation(s)
- Anushi Shukla
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Neha Bunkar
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Rajat Kumar
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Arpit Bhargava
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Rajnarayan Tiwari
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Koel Chaudhury
- School of Medical Science & Technology, Indian Institute of Technology, Kharagpur, India
| | - Irina Y Goryacheva
- Department of General and Inorganic Chemistry, Saratov State University, Saratov, Russia
| | - Pradyumna K Mishra
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India.
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27
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Abstract
: Environmental factors underlie more than one-fifth of deaths and disability worldwide. Globally, both indoor and outdoor particulate matter pollution are leading risk factors for reduced quality of life and death. Nurses are in a key position to assess particulate matter exposure and to intervene, providing population, community, family, and individual risk reduction and care. This article presents a case study describing one patient's experiences with asthma and multiple comorbidities, an overview of particulate matter exposure and health, and management strategies for practice.
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28
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Yen YC, Yang CY, Mena KD, Cheng YT, Yuan CS, Chen PS. Jumping on the bed and associated increases of PM 10, PM 2.5, PM 1, airborne endotoxin, bacteria, and fungi concentrations. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 245:799-809. [PMID: 30502709 DOI: 10.1016/j.envpol.2018.11.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 11/16/2018] [Accepted: 11/17/2018] [Indexed: 06/09/2023]
Abstract
Jumping on the bed is a favorite behavior of children; however, no study has investigated the increased air pollutants resulting from jumping on the bed. Therefore, we aimed to investigate the elevated concentrations of particulate matter (PM) and bioaerosols from jumping on the bed and making the bed. Simulation of jumping on the bed and making the bed was performed at sixty schoolchildren's houses in Taiwan. PM10, PM2.5, PM1 (PM with aerodynamic diameter less than 10, 2.5, and 1 μm, respectively) and airborne bacteria, fungi and endotoxin concentrations were simultaneously measured over simulation and background periods. Our results show the increase of PM10, PM2.5, PM1, airborne bacteria and fungi through the behavior of jumping on the bed (by 414 μg m-3, 353 μg m-3, 349 μg m-3, 6569 CFU m-3 and 978 CFU m-3, respectively). When making the bed, the PM10, PM2.5, PM1, airborne bacteria and fungi also significantly increased by 4.69 μg m-3, 4.09 μg m-3, 4.15 μg m-3, 8569 CFU m-3, and 779 CFU m-3, respectively. Airborne endotoxin concentrations significantly increased by 21.76 EU m-3 following jumping on the bed and making the bed. Moreover, when jumping on the bed, higher PM2.5 and PM1 concentrations in houses with furry pets rather than no furry pets, and less airborne fungi in apartments than in townhouses were found. For making the bed, lower airborne fungi was found in houses using essential oils rather than no essential oils using. The airborne endotoxin concentrations were positively associated with furry pets and smokers in the homes and negatively correlated to the home with window opening with a statistical significance during the periods of jumping on the bed and making the bed. In conclusion, significant increases of PM and bioaerosols during jumping on the bed and making the bed may need to be concerned.
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Affiliation(s)
- Yu-Chuan Yen
- Department of Public Health, College of Health Science, Kaohsiung Medical University, Kaohsiung City, Taiwan
| | - Chun-Yuh Yang
- Department of Public Health, College of Health Science, Kaohsiung Medical University, Kaohsiung City, Taiwan
| | - Kristina Dawn Mena
- Epidemiology, Human Genetics, and Environmental Sciences, School of Public Health, University of Texas Health Science Center at Houston, TX, United States
| | - Yu-Ting Cheng
- Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan
| | - Chung-Shin Yuan
- Institute of Environmental Engineering, College of Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Pei-Shih Chen
- Department of Public Health, College of Health Science, Kaohsiung Medical University, Kaohsiung City, Taiwan; Institute of Environmental Engineering, College of Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung City, Taiwan.
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29
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Campagnolo D, Cattaneo A, Corbella L, Borghi F, Del Buono L, Rovelli S, Spinazzé A, Cavallo DM. In-vehicle airborne fine and ultra-fine particulate matter exposure: The impact of leading vehicle emissions. ENVIRONMENT INTERNATIONAL 2019; 123:407-416. [PMID: 30622065 DOI: 10.1016/j.envint.2018.12.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 11/30/2018] [Accepted: 12/10/2018] [Indexed: 06/09/2023]
Abstract
Airborne particulate matter (PM) concentrations inside vehicle cabins are often extremely high compared to background levels. The present study was motivated by the fact that in the last few decades, the implementation of new emission standards has led to the reduction of vehicle particle emissions. This study addresses for the first time the relationship between leading vehicle (LV) emissions and in-cabin PM exposure levels in the immediately following vehicle (henceforth called the study vehicle - SV), with particular emphasis on the role of the LV's emission reduction technologies (e.g., diesel particulate filter-DPF) as an effective risk management measure. The study was performed using an instrumented study vehicle (always to be considered as the following vehicle) on a 26-km fixed route where 10 repeated tests were conducted during 60-minute trips. On-line monitoring of the fine 0.3-1 μm and 1-2.5 μm (PM0.3-1 and PM1-2.5) and ultra-fine particle (UFP) concentrations was performed inside the SV's car cabin with fixed ventilation settings (i.e., windows closed, air conditioning off, and recirculation fan off). Simultaneously, the license plate numbers of the LVs along the route were recorded to retrieve information pertaining to their fuel type and Euro emission standard category. The results clearly showed that the in-cabin PM levels were significantly affected by the LV's Euro emission standard. Regarding petrol-fuelled LVs, the median in-cabin particle exposure levels were statistically lower (e.g., -34% for PM0.3-1) when following vehicles with stricter emission standards (in particular, Euro 6) than when following a low-emission standard vehicle (i.e., Euro 0-2). Concerning diesel-fuelled LVs, a strong and significant decrease in the in-cabin median exposure levels (up to -62%, -44%, and -48% for UFPs, PM0.3-1, and PM1-2.5, respectively) was observed for recent-emission standards LVs (i.e., Euro 5-6) with respect to older-emission standard LVs (i.e., Euro 0-4). A specific analysis revealed that the in-cabin median exposure concentrations of PM were highly and significantly reduced by DPF-equipped LVs. For UFPs, this resulted in a 47% reduction compared to diesel-fuelled (non-DPF) LVs. For PM0.3-1, an approximate 80% reduction was observed compared to both petrol-fuelled and diesel-fuelled (non-DPF) LVs. For PM1-2.5, an approximate 38% reduction was observed compared to petrol-fuelled LVs and a 46% reduction compared to non-DPF LVs.
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Affiliation(s)
- Davide Campagnolo
- Department of Science and High Technology, Università degli Studi dell'Insubria, via Valleggio 11, 22100 Como, Italy.
| | - Andrea Cattaneo
- Department of Science and High Technology, Università degli Studi dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Leonardo Corbella
- Department of Science and High Technology, Università degli Studi dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Francesca Borghi
- Department of Science and High Technology, Università degli Studi dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Luca Del Buono
- Department of Science and High Technology, Università degli Studi dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Sabrina Rovelli
- Department of Science and High Technology, Università degli Studi dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Andrea Spinazzé
- Department of Science and High Technology, Università degli Studi dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Domenico M Cavallo
- Department of Science and High Technology, Università degli Studi dell'Insubria, via Valleggio 11, 22100 Como, Italy
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30
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Stevens JS, Padilla S, DeMarini DM, Hunter DL, Martin WK, Thompson LC, Gilmour MI, Hazari MS, Farraj AK. Zebrafish Locomotor Responses Reveal Irritant Effects of Fine Particulate Matter Extracts and a Role for TRPA1. Toxicol Sci 2019; 161:290-299. [PMID: 29048608 DOI: 10.1093/toxsci/kfx217] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Exposure to fine particulate matter (PM) air pollution causes adverse cardiopulmonary outcomes. Yet, the limited capacity to readily identify contributing PM sources and associated PM constituents in any given ambient air shed impedes risk assessment efforts. The health effects of PM have been attributed in part to its capacity to elicit irritant responses. A variety of chemicals trigger irritant behavior responses in zebrafish that can be easily measured. The purposes of this study were to examine the utility of zebrafish locomotor responses in the toxicity assessment of fine PM and its chemical fractions and uncover mechanisms of action. Locomotor responses were recorded in 6-day-old zebrafish exposed for 60 min in the dark at 26 °C to the extractable organic matter of a compressor-generated diesel exhaust PM (C-DEP) and 4 of its fractions (F1-F4) containing varying chemical classes of increasing polarity. The role of the transient receptor potential (TRP) cation channel TRPA1, a chemical sensor in mammals and zebrafish, in locomotor responses to C-DEP, was also examined. Acrolein, an environmental irritant and known activator of TRPA1, and all extracts induced concentration-dependent locomotor responses whose potencies ranked as follows: polar F3 > weakly polar F2 > C-DEP > highly polar F4 > nonpolar F1, indicating that polar and weakly polar fractions that included nitro- and oxy-polyaromatic hydrocarbons (PAHs), drove C-DEP responses. Irritant potencies in fish positively correlated with mutagenic potencies of the same extracts in strains of Salmonella sensitive to nitro- and oxy-PAHs, further implicating these chemical classes in the zebrafish responses to C-DEP. Pharmacologic inhibition of TRPA1 blocked locomotor responses to acrolein and the extracts. Taken together, these data indicate that the zebrafish locomotor assay may help expedite toxicity screening of fine PM sources, identify causal chemical classes, and uncover plausible biological mechanisms.
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Affiliation(s)
- Joey S Stevens
- Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37830
| | | | | | | | - W Kyle Martin
- Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37830
| | - Leslie C Thompson
- Environmental Public Health Division, USEPA, Research Triangle Park, North Carolina 27711
| | - M Ian Gilmour
- Environmental Public Health Division, USEPA, Research Triangle Park, North Carolina 27711
| | - Mehdi S Hazari
- Environmental Public Health Division, USEPA, Research Triangle Park, North Carolina 27711
| | - Aimen K Farraj
- Environmental Public Health Division, USEPA, Research Triangle Park, North Carolina 27711
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Brugha R, Edmondson C, Davies JC. Outdoor air pollution and cystic fibrosis. Paediatr Respir Rev 2018; 28:80-86. [PMID: 29793860 DOI: 10.1016/j.prrv.2018.03.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 03/26/2018] [Accepted: 03/27/2018] [Indexed: 02/01/2023]
Abstract
Outdoor air pollution is increasingly identified as a contributor to respiratory and cardiovascular disease. Pro-inflammatory particles and gases are inhaled deep into the lungs, and are associated with impaired lung growth and exacerbations of chronic respiratory diseases. The magnitude of these effects are of interest to patients and families, and have been assessed in studies specific to CF. Using systematic review methodology, we sought to collate these studies in order to summarise the known effects of air pollution in cystic fibrosis, and to present information on decreasing personal air pollution exposures.
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Affiliation(s)
- Rossa Brugha
- Gene Therapy, National Heart and Lung Institute, Imperial College London, Emmanuel Kaye Building, Manresa Road, London SW3 6LR, United Kingdom.
| | - Claire Edmondson
- Gene Therapy, National Heart and Lung Institute, Imperial College London, Emmanuel Kaye Building, Manresa Road, London SW3 6LR, United Kingdom.
| | - Jane C Davies
- Gene Therapy, National Heart and Lung Institute, Imperial College London, Emmanuel Kaye Building, Manresa Road, London SW3 6LR, United Kingdom.
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Hedmer M, Wierzbicka A, Li H, Albin M, Tinnerberg H, Broberg K. Diesel Exhaust Exposure Assessment Among Tunnel Construction Workers-Correlations Between Nitrogen Dioxide, Respirable Elemental Carbon, and Particle Number. Ann Work Expo Health 2018; 61:539-553. [PMID: 28371844 DOI: 10.1093/annweh/wxx024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 02/02/2017] [Indexed: 11/14/2022] Open
Abstract
Objectives Occupational exposure to diesel exhaust is common due the widespread use of diesel-powered combustion engines. Diesel exhaust is chemically complex and consists of thousands of compounds present as gases and particulate matter. Both nitrogen dioxide (NO2) and elemental carbon (EC) have been used as markers for diesel exhaust exposure. Currently EC is regarded as the best surrogate of diesel exhaust. The objective was to quantify the occupational exposure to diesel exhaust in underground tunnel construction work using a multi-metric approach, and to investigate the correlations between NO2, respirable EC, respirable organic carbon (OC), respirable total carbon (TC), respirable dust (RD), and particle number. Also, the use of NO2 as a proxy for diesel exhaust was evaluated, how much of the variability in the diesel exhaust exposure was attributed to within and between individual factors and if there was a difference between expert and self-administered measurements of NO2. Methods The personal exposure to diesel exhaust was assessed by expert supervised measurements of NO2, EC, OC, TC, RD and particle number in the breathing zones of underground tunnel workers. Stationary sampling of NO2, EC, OC, TC, RD, size-fractioned mass concentration, and particle number were conducted. The personal and stationary measurements were conducted on three occasions simultaneously. The workers measured their exposure by repeated self-administered measurements of NO2. The self-administered measurements were performed twice for each worker with at least one month lag between the samplings. Results In the simultaneous sampling of diesel exhaust, the geometric mean (GM) concentration of NO2 and respirable EC were 72 µg m-3 (10th-90th percentile 34-140 µg m-3) and 2.6 µg m-3 (10th-90th percentile 1.6-7.3 µg m-3), respectively. The GM for OC and TC was 28 µg m-3 (10th-90th percentile 20-42 µg m-3) and 31 µg m-3 (10th-90th percentile 20-50 µg m-3), respectively. The GM for RD and particle number was 180 µg m-3 (10th-90th percentile 20-530 µg m-3) and 47 900 cm-3 (10th-90th percentile 27500-94100 cm-3), respectively. A significant correlation was found between NO2 and respirable EC [Spearman's correlation r = 0.53 (P = 0.05)]. The within-worker variability of NO2 was 45.5% and the between-worker variability was 54.5%. The self-administered measured concentrations of NO2 (GM 70 µg m-3) did not statistically differ from the NO2 concentrations measured by an expert (P > 0.35). Conclusion The diesel exhaust exposure in tunnel construction work was low. A significant correlation between NO2 and EC was observed. This indicates that NO2 could be used as a proxy for diesel exhaust in tunnel work if diesel exhaust is the only source of NO2 and if the ratio between EC and NO2 is known and constant. Passive sampling of NO2 is much easier and cheaper to perform compared with active sampling of EC. It is possible to utilize self-administered NO2 measurements in extreme and inaccessible work environments. This study adds support to continued use of NO2 as an exposure marker in combination with EC for diesel exhaust exposure. In tunnel construction work, the variability in the diesel exhaust exposure was high both between- and within-workers.
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Affiliation(s)
- Maria Hedmer
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, PO Box 118, Lund SE-22100, Sweden
| | - Aneta Wierzbicka
- Division of Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, PO Box 118, Lund SE-22100, Sweden
| | - Huiqi Li
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, PO Box 118, Lund SE-22100, Sweden
| | - Maria Albin
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, PO Box 118, Lund SE-22100, Sweden
| | - Håkan Tinnerberg
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, PO Box 118, Lund SE-22100, Sweden
| | - Karin Broberg
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, PO Box 118, Lund SE-22100, Sweden
- Unit of Metals and Health, Institute of Environmental Medicine, Karolinska Institutet, PO Box 210, Stockholm SE-171 77, Sweden
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De Simone U, Roccio M, Gribaldo L, Spinillo A, Caloni F, Coccini T. Human 3D Cultures as Models for Evaluating Magnetic Nanoparticle CNS Cytotoxicity after Short- and Repeated Long-Term Exposure. Int J Mol Sci 2018; 19:ijms19071993. [PMID: 29986546 PMCID: PMC6073335 DOI: 10.3390/ijms19071993] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 07/02/2018] [Accepted: 07/04/2018] [Indexed: 11/20/2022] Open
Abstract
Since nanoparticles (NPs) can translocate to the brain and impact the highly vulnerable central nervous system (CNS), novel in vitro tools for the assessment of NP-induced neurotoxicity are advocated. In this study, two types of CNS spheroids have been developed from human D384 astrocyte- and SH-SY5Y neuronal-like cells, and optimized in combination with standard assays (viability readout and cell morphology) to test neurotoxic effects caused by Fe3O4NPs, as NP-model, after short- (24–48 h; 1–100µg/ml) and long-term repeated exposure (30days; 0.1–25µg/ml). Short-term exposure of 3D-spheroids to Fe3O4NP induced cytotoxicity at 10 µg/mL in astrocytes and 25 µg/mL neurons. After long-term repeated dose regimen, spheroids showed concentration- and time-dependent cell mortality at 10 µg/mL for D384 and 0.5 µg/mL for SH-SY5Y, indicating a higher susceptibility of neurons than astrocytes. Both spheroid types displayed cell disaggregation after the first week of treatment at ≥0.1 µg/mL and becoming considerably evident at higher concentrations and over time. Recreating the 3D-spatial environment of the CNS allows cells to behave in vitro more closely to the in vivo situations, therefore providing a model that can be used as a stand-alone test or as a part of integrated testing strategies. These models could drive an improvement in the species-relevant predictivity of toxicity testing.
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Affiliation(s)
- Uliana De Simone
- Laboratory of Clinical and Experimental Toxicology, Toxicology Unit, ICS Maugeri SpA-BC, IRCCS Pavia, 27100 Pavia, Italy.
| | - Marianna Roccio
- Department of Obstetrics and Gynecology, IRCCS Foundation Policlinico San Matteo and University of Pavia, 27100 Pavia, Italy.
| | - Laura Gribaldo
- European Commission, Directorate General Joint Research Centre, Directorate F-Health, Consumers and Reference Materials, Chemicals Safety and Alternative Methods Unit, 21027 Ispra, Italy.
| | - Arsenio Spinillo
- Department of Obstetrics and Gynecology, IRCCS Foundation Policlinico San Matteo and University of Pavia, 27100 Pavia, Italy.
| | - Francesca Caloni
- Università degli Studi di Milano, Dipartimento di Medicina Veterinaria (DIMEVET), 20133 Milano, Italy.
| | - Teresa Coccini
- Laboratory of Clinical and Experimental Toxicology, Toxicology Unit, ICS Maugeri SpA-BC, IRCCS Pavia, 27100 Pavia, Italy.
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Guan T, Hu S, Han Y, Wang R, Zhu Q, Hu Y, Fan H, Zhu T. The effects of facemasks on airway inflammation and endothelial dysfunction in healthy young adults: a double-blind, randomized, controlled crossover study. Part Fibre Toxicol 2018; 15:30. [PMID: 29973251 PMCID: PMC6032602 DOI: 10.1186/s12989-018-0266-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 06/15/2018] [Indexed: 12/18/2022] Open
Abstract
Background Facemasks are increasingly worn during air pollution episodes in China, but their protective effects are poorly understood. We aimed to evaluate the filtration efficiencies of N95 facemasks and the cardiopulmonary benefits associated with wearing facemasks during episodes of pollution. Results We measured the filtration efficiencies of particles in ambient air of six types of N95 facemasks with a manikin headform. The most effective one was used in a double-blind, randomized, controlled crossover study, involving 15 healthy young adults, conducted during 2 days of severe pollution in Beijing, China. Subjects were asked to walk along a busy-traffic road for 2 h wearing authentic or sham N95 facemasks. Clinical tests were performed four times to determine changes in the levels of biomarkers of airway inflammation, endothelial dysfunction, and oxidative stress within 24 h after exposure. The facemasks removed 48–75% of number concentrations of ambient air particles between 5.6 and 560 nm in diameter. After adjustments for multiple comparison, the exhaled nitric oxide level and the levels of interleukin-1α, interleukin-1β, and interleukin-6 in exhaled breath condensate increased significantly in all subjects; however, the increases in those wearing authentic facemasks were statistically significantly lower than in the sham group. No significant between-group difference was evident in the urinary creatinine-corrected malondialdehyde level. In arterial stiffness indicators, the ejection duration of subjects wearing authentic facemasks was higher after exposure compared to the sham group; no significant between-group difference was found in augmentation pressure or the augmentation index. Conclusions In young healthy adults, N95 facemasks partially reduced acute particle-associated airway inflammation, but neither systemic oxidative stress nor endothelial dysfunction improved significantly. The clinical significance of these findings long-term remains to be determined. Trial registration The trial registration number (TRN) for this study is ChiCTR1800016099, which was retrospectively registered on May 11, 2018. Electronic supplementary material The online version of this article (10.1186/s12989-018-0266-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Tianjia Guan
- BIC-EAST and SKL-ESPC, College of Environmental Sciences and Engineering and Centre for Environment and Health, Peking University, 5 Yiheyuan Road, Beijing, 100871, China.,School of Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Songhe Hu
- BIC-EAST and SKL-ESPC, College of Environmental Sciences and Engineering and Centre for Environment and Health, Peking University, 5 Yiheyuan Road, Beijing, 100871, China
| | - Yiqun Han
- BIC-EAST and SKL-ESPC, College of Environmental Sciences and Engineering and Centre for Environment and Health, Peking University, 5 Yiheyuan Road, Beijing, 100871, China
| | - Ruoyu Wang
- BIC-EAST and SKL-ESPC, College of Environmental Sciences and Engineering and Centre for Environment and Health, Peking University, 5 Yiheyuan Road, Beijing, 100871, China
| | - Qindan Zhu
- BIC-EAST and SKL-ESPC, College of Environmental Sciences and Engineering and Centre for Environment and Health, Peking University, 5 Yiheyuan Road, Beijing, 100871, China
| | - Yaoqian Hu
- BIC-EAST and SKL-ESPC, College of Environmental Sciences and Engineering and Centre for Environment and Health, Peking University, 5 Yiheyuan Road, Beijing, 100871, China
| | - Hanqing Fan
- BIC-EAST and SKL-ESPC, College of Environmental Sciences and Engineering and Centre for Environment and Health, Peking University, 5 Yiheyuan Road, Beijing, 100871, China
| | - Tong Zhu
- BIC-EAST and SKL-ESPC, College of Environmental Sciences and Engineering and Centre for Environment and Health, Peking University, 5 Yiheyuan Road, Beijing, 100871, China.
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Liu JY, Hsiao TC, Lee KY, Chuang HC, Cheng TJ, Chuang KJ. Association of ultrafine particles with cardiopulmonary health among adult subjects in the urban areas of northern Taiwan. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 627:211-215. [PMID: 29426143 DOI: 10.1016/j.scitotenv.2018.01.218] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 01/14/2018] [Accepted: 01/22/2018] [Indexed: 05/07/2023]
Abstract
The association between short-term exposure to particulate air pollution, especially fine particles, and cardiopulmonary health has been well-established in previous studies. However, previous findings regarding the effect of ultrafine particles (UFPs) on cardiopulmonary health are inconsistent. We repeatedly measured the mass concentrations of UFPs using a Micro-Orifice Uniform Deposit Impactor (MOUDI) in the apartments of 100 adult participants and collected the participants' health data from the pulmonary outpatient unit of Shuang-Ho Hospital to investigate the association between short-term exposure to UFPs and cardiopulmonary health using mixed-effects models from January 1, 2014 to August 31, 2017. We also collected ambient air pollution monitoring data from the Taiwan Environmental Protection Administration for data analysis. We observed that an interquartile range increase in the 24-hour mean UFPs (0.97 μg/m3) was associated with a 6.3% [95% confidence interval (CI) = 2.9, 9.7], 5.6% (95% CI = 4.1, 7.1) and 8.5% (95% CI = 3.9, 13.1) increase in systolic blood pressure, diastolic blood pressure and high sensitivity-C-reactive protein, respectively. We also observed the association of particulate matter less than or equal to 2.5 μm in diameter and nitrogen dioxide with increased blood pressure and ozone with decreased lung function. A negative trend between UFPs and forced expiratory volume in the first second was observed. We concluded that short-term exposure to UFPs was associated with cardiovascular health in adult subjects in the urban areas of northern Taiwan.
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Affiliation(s)
- Jun-Yu Liu
- School of Public Health, College of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Ta-Chih Hsiao
- Graduate Institute of Environmental Engineering, National Central University, Taoyuan County, Taiwan
| | - Kang-Yun Lee
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan; Division of Thoracic Medicine, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Hsiao-Chi Chuang
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan; Division of Thoracic Medicine, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Tsun-Jen Cheng
- Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Kai-Jen Chuang
- Department of Public Health, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
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36
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Xu Y, Kåredal M, Nielsen J, Adlercreutz M, Bergendorf U, Strandberg B, Antonsson AB, Tinnerberg H, Albin M. Exposure, respiratory symptoms, lung function and inflammation response of road-paving asphalt workers. Occup Environ Med 2018; 75:494-500. [PMID: 29848553 PMCID: PMC6035487 DOI: 10.1136/oemed-2017-104983] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 04/09/2018] [Accepted: 05/03/2018] [Indexed: 11/16/2022]
Abstract
Background Controversy exists as to the health effects of exposure to asphalt and crumb rubber modified (CRM) asphalt, which contains recycled rubber tyres. Objective To assess exposures and effects on airway symptoms, lung function and inflammation biomarkers in conventional and CRM asphalt road pavers. Methods 116 conventional asphalt workers, 51 CRM asphalt workers and 100 controls were investigated. A repeated-measures analysis included 31 workers paving with both types of asphalt. Exposure to dust, nitrosamines, benzothiazole and polycyclic aromatic hydrocarbon (PAH) was measured in worksites. Self-reported symptoms, spirometry test and blood sampling were conducted prework and postwork. Symptoms were further collected during off-season for asphalt paving. Results Dust, PAHs and nitrosamine exposure was highly varied, without difference between conventional and CRM asphalt workers. Benzothiazole was higher in CRM asphalt workers (p<0.001). Higher proportions of asphalt workers than controls reported eye symptoms with onset in the current job. Decreased lung function from preworking to postworking was found in CRM asphalt workers and controls. Preworking interleukin-8 was higher in CRM asphalt workers than in the controls, followed by a decrement after 4 days of working. No differences in any studied effects were found between conventional and CRM asphalt paving. Conclusion CRM asphalt workers are exposed to higher benzothiazole. Further studies are needed to identify the source of nitrosamines in conventional asphalt. Mild decrease in lung function in CRM asphalt workers and work-related eye symptoms in both asphalt workers were observed. However, our study did not find strong evidence for severe respiratory symptoms and inflammation response among asphalt workers.
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Affiliation(s)
- Yiyi Xu
- Division of Occupational and Environmental Medicine, Laboratory Medicine, Lund University, Lund, Sweden.,Section of Occupational and Environmental Medicine, Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Monica Kåredal
- Division of Occupational and Environmental Medicine, Laboratory Medicine, Lund University, Lund, Sweden
| | - Jörn Nielsen
- Division of Occupational and Environmental Medicine, Laboratory Medicine, Lund University, Lund, Sweden
| | - Mariana Adlercreutz
- Division of Occupational and Environmental Medicine, Laboratory Medicine, Lund University, Lund, Sweden
| | - Ulf Bergendorf
- Division of Occupational and Environmental Medicine, Laboratory Medicine, Lund University, Lund, Sweden
| | - Bo Strandberg
- Division of Occupational and Environmental Medicine, Laboratory Medicine, Lund University, Lund, Sweden.,Section of Occupational and Environmental Medicine, Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | | | - Håkan Tinnerberg
- Division of Occupational and Environmental Medicine, Laboratory Medicine, Lund University, Lund, Sweden
| | - Maria Albin
- Division of Occupational and Environmental Medicine, Laboratory Medicine, Lund University, Lund, Sweden.,Unit of Occupational Medicine, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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37
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Dai Y, Ren D, Bassig BA, Vermeulen R, Hu W, Niu Y, Duan H, Ye M, Meng T, Xu J, Bin P, Shen M, Yang J, Fu W, Meliefste K, Silverman D, Rothman N, Lan Q, Zheng Y. Occupational exposure to diesel engine exhaust and serum cytokine levels. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2018; 59:144-150. [PMID: 29023999 PMCID: PMC6438621 DOI: 10.1002/em.22142] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 09/05/2017] [Accepted: 09/07/2017] [Indexed: 05/27/2023]
Abstract
The International Agency for Research on Cancer has classified diesel engine exhaust (DEE) as a human lung carcinogen. Given that inflammation is suspected to be an important underlying mechanism of lung carcinogenesis, we evaluated the relationship between DEE exposure and the inflammatory response using data from a cross-sectional molecular epidemiology study of 41 diesel engine testing workers and 46 unexposed controls. Repeated personal exposure measurements of PM2.5 and other DEE constituents were taken for the diesel engine testing workers before blood collection. Serum levels of six inflammatory biomarkers including interleukin (IL)-1, IL-6, IL-8, tumor necrosis factor (TNF)-α, macrophage inflammatory protein (MIP)-1β, and monocyte chemotactic protein (MCP)-1 were analyzed in all subjects. Compared to unexposed controls, concentrations of MIP-1β were significantly reduced by ∼37% in DEE exposed workers (P < 0.001) and showed a strong decreasing trend with increasing PM2.5 concentrations in all subjects (Ptrend < 0.001) as well as in exposed subjects only (Ptrend = 0.001). Levels of IL-8 and MIP-1β were significantly lower in workers in the highest exposure tertile of PM2.5 (>397 µg/m3 ) compared to unexposed controls. Further, significant inverse exposure-response relationships for IL-8 and MCP-1 were also found in relation to increasing PM2.5 levels among the DEE exposed workers. Given that IL-8, MIP-1β, and MCP-1 are chemokines that play important roles in recruitment of immunocompetent cells for immune defense and tumor cell clearance, the observed lower levels of these markers with increasing PM2.5 exposure may provide insight into the mechanism by which DEE promotes lung cancer. Environ. Mol. Mutagen. 59:144-150, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Yufei Dai
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention. Beijing, China
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute. Rockville, Maryland, U.S.A
| | - Dianzhi Ren
- Chaoyang Center for Disease Control and prevention, Chaoyang, China
| | - Bryan A. Bassig
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute. Rockville, Maryland, U.S.A
| | - Roel Vermeulen
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
| | - Wei Hu
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute. Rockville, Maryland, U.S.A
| | - Yong Niu
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention. Beijing, China
| | - Huawei Duan
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention. Beijing, China
| | - Meng Ye
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention. Beijing, China
| | - Tao Meng
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention. Beijing, China
| | - Jun Xu
- Hong Kong University, Hong Kong, China
| | - Ping Bin
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention. Beijing, China
| | - Meili Shen
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention. Beijing, China
| | - Jufang Yang
- Chaoyang Center for Disease Control and prevention, Chaoyang, China
| | - Wei Fu
- Chaoyang Center for Disease Control and prevention, Chaoyang, China
| | - Kees Meliefste
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
| | - Debra Silverman
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute. Rockville, Maryland, U.S.A
| | - Nathaniel Rothman
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute. Rockville, Maryland, U.S.A
| | - Qing Lan
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute. Rockville, Maryland, U.S.A
| | - Yuxin Zheng
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention. Beijing, China
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In Vivo Protective Effects of Nootkatone against Particles-Induced Lung Injury Caused by Diesel Exhaust Is Mediated via the NF-κB Pathway. Nutrients 2018; 10:nu10030263. [PMID: 29495362 PMCID: PMC5872681 DOI: 10.3390/nu10030263] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 01/18/2018] [Accepted: 01/23/2018] [Indexed: 12/21/2022] Open
Abstract
Numerous studies have shown that acute particulate air pollution exposure is linked with pulmonary adverse effects, including alterations of pulmonary function, inflammation, and oxidative stress. Nootkatone, a constituent of grapefruit, has antioxidant and anti-inflammatory effects. However, the effect of nootkatone on lung toxicity has not been reported so far. In this study we evaluated the possible protective effects of nootkatone on diesel exhaust particles (DEP)-induced lung toxicity, and the possible mechanisms underlying these effects. Mice were intratracheally (i.t.) instilled with either DEP (30 µg/mouse) or saline (control). Nootkatone was given to mice by gavage, 1 h before i.t. instillation, with either DEP or saline. Twenty-four hours following DEP exposure, several physiological and biochemical endpoints were assessed. Nootkatone pretreatment significantly prevented the DEP-induced increase in airway resistance in vivo, decreased neutrophil infiltration in bronchoalveolar lavage fluid, and abated macrophage and neutrophil infiltration in the lung interstitium, assessed by histolopathology. Moreover, DEP caused a significant increase in lung concentrations of 8-isoprostane and tumor necrosis factor α, and decreased the reduced glutathione concentration and total nitric oxide activity. These actions were all significantly alleviated by nootkatone pretreatment. Similarly, nootkatone prevented DEP-induced DNA damage and prevented the proteolytic cleavage of caspase-3. Moreover, nootkatone inhibited nuclear factor-kappaB (NF-κB) induced by DEP. We conclude that nootkatone prevented the DEP-induced increase in airway resistance, lung inflammation, oxidative stress, and the subsequent DNA damage and apoptosis through a mechanism involving inhibition of NF-κB activation. Nootkatone could possibly be considered a beneficial protective agent against air pollution-induced respiratory adverse effects.
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Pietroiusti A, Stockmann-Juvala H, Lucaroni F, Savolainen K. Nanomaterial exposure, toxicity, and impact on human health. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2018; 10:e1513. [PMID: 29473695 DOI: 10.1002/wnan.1513] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/03/2018] [Accepted: 01/16/2018] [Indexed: 12/17/2022]
Abstract
The use of engineered nanomaterials (ENM) has grown after the turn of the 21st century. Also, the production of ENM has globally grown, and exposure of workers especially via the lungs to ENM has increased. This review tackles with effects of ENM on workers' health because occupational environment is the main source of exposure to ENM. Assessment of exposure to ENM is demanding, and today there are no occupational exposure level (OEL) for ENM. This is partly due to challenges of such measurements, and in part to the unknown causality between ENM metrics and effects. There are also marked gaps in systematic knowledge on ENM hazards. Human health surveys of exposed workers, or human field studies have not identified specific effects of ENM linking them with a specific exposure. There is, however, a consensus that material characteristics such as size, and chemistry influence effects of ENM. Available data suggest that multiwalled carbon nanotubes (MWCNT) affect the immunological system and cause inflammation of the lungs, or signs of asthma whereas carbon nanofibers (CNF) may cause interstitial fibrosis. Metallic and metal oxide nanoparticles together with MWCNT induce genotoxicity, and a given type of MWCNT has been identified as a possible human carcinogen. Currently, lack of understanding of mechanisms of effects of ENM renders assessment of hazards and risks of ENM material-by-material a necessity. The so called "omics" approaches utilizing ENM-induced alterations in gene and protein expression may be useful in the development of a new paradigm for ENM hazard and risk assessment. This article is categorized under: Toxicology and Regulatory Issues in Nanomedicine > Toxicology of Nanomaterials.
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Affiliation(s)
- Antonio Pietroiusti
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | | | - Francesca Lucaroni
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Kai Savolainen
- Work Environment, Finnish Institute of Occupational Health, Helsinki, Finland
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Roberts SM, Rohr AC, Mikheev VB, Munson J, Sabo-Attwood T. Influence of airborne particulates on respiratory tract deposition of inhaled toluene and naphthalene in the rat. Inhal Toxicol 2018; 30:19-28. [PMID: 29465005 DOI: 10.1080/08958378.2018.1438539] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Most studies report that inhaled volatile and semivolatile organic compounds (VOCs/SVOCs) tend to deposit in the upper respiratory tract, while ultrafine (or near ultrafine) particulate matter (PM) (∼100 nm) reaches the lower airways. The objective of this study was to determine whether carbon particle co-exposure carries VOCs/SVOCs deeper into the lungs where they are deposited. MATERIALS AND METHODS Male Sprague-Dawley rats were exposed by inhalation (nose-only) to radiolabeled toluene (20 ppm) or naphthalene (20 ppm) on a single occasion for 1 h, with or without concurrent carbon particle exposure (∼5 mg/m3). The distribution of radiolabel deposited within the respiratory tract of each animal was determined after sacrifice. The extent of adsorption of toluene and naphthalene to airborne carbon particles under the exposure conditions of the study was also assessed. RESULTS We found that in the absence of particles, the highest deposition of both naphthalene and toluene was observed in the upper respiratory tract. Co-exposure with carbon particles tended to increase naphthalene deposition slightly throughout the respiratory tract, whereas slight decreases in toluene deposition were observed. Few differences were statistically significant. Naphthalene showed greater adsorption to the particles compared to toluene, but overall the particle-adsorbed concentration of each of these compounds was a small fraction of the total inspired concentration. CONCLUSIONS These studies imply that at the concentrations used for the exposures in this study, inhaled carbon particles do not substantially alter the deposition of naphthalene and toluene within the respiratory tract.
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Affiliation(s)
- Stephen M Roberts
- a Center for Environmental & Human Toxicology , University of Florida , Gainesville , FL , USA
| | - Annette C Rohr
- b Electric Power Research Institute , Palo Alto , CA , USA
| | - Vladimir B Mikheev
- c Battelle Public Health Center for Tobacco Research , Columbus , OH , USA
| | - John Munson
- a Center for Environmental & Human Toxicology , University of Florida , Gainesville , FL , USA
| | - Tara Sabo-Attwood
- d Department of Environmental and Global Health , University of Florida , Gainesville , FL , USA
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Bencsik A, Lestaevel P, Guseva Canu I. Nano- and neurotoxicology: An emerging discipline. Prog Neurobiol 2018; 160:45-63. [DOI: 10.1016/j.pneurobio.2017.10.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Revised: 09/10/2017] [Accepted: 10/20/2017] [Indexed: 12/12/2022]
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Bengalli R, Longhin E, Marchetti S, Proverbio MC, Battaglia C, Camatini M. The role of IL-6 released from pulmonary epithelial cells in diesel UFP-induced endothelial activation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 231:1314-1321. [PMID: 28916279 DOI: 10.1016/j.envpol.2017.08.104] [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: 02/15/2017] [Revised: 08/24/2017] [Accepted: 08/24/2017] [Indexed: 06/07/2023]
Abstract
Diesel exhaust particles (DEP) and their ultrafine fraction (UFP) are known to induce cardiovascular effects in exposed subjects. The mechanisms leading to these outcomes are still under investigation, but the activation of respiratory endothelium is likely to be involved. Particles translocation through the air-blood barrier and the release of mediators from the exposed epithelium have been suggested to participate in the process. Here we used a conditioned media in vitro model to investigate the role of epithelial-released mediators in the endothelial cells activation. Diesel UFP were sampled from a Euro 4 vehicle run over a chassis dyno and lung epithelial BEAS-2B cells were exposed for 20 h (dose 5 μg/cm2). The exposure media were collected and used for endothelial HPMEC-ST1.6R cells treatment for 24 h. The processes related to oxidative stress and inflammation were investigated in the epithelial cells, accordingly to the present knowledge on DEP toxicity. The release of IL-6 and VEGF was significantly augmented in diesel exposed cells. In endothelial cells, VCAM-1 and ICAM-1 adhesion molecules levels were increased after exposure to the conditioned media. By interfering with IL-6 binding to its endothelial receptor, we demonstrate the role of this interleukin in inducing the endothelial response.
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Affiliation(s)
- Rossella Bengalli
- Polaris Research Centre, Dept. of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza, 1, 20126, Milan, Italy.
| | - Eleonora Longhin
- Polaris Research Centre, Dept. of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza, 1, 20126, Milan, Italy
| | - Sara Marchetti
- Polaris Research Centre, Dept. of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza, 1, 20126, Milan, Italy
| | - Maria C Proverbio
- Department of Physiopathology and Transplantation, University of Milan, Via Fratelli Cervi 93, 20090, Segrate, Italy
| | - Cristina Battaglia
- Department of Medical Biotechnology and Translational Medicine (BIOMETRA), University of Milan, Via F.lli Cervi 93, 20090, Segrate, Italy
| | - Marina Camatini
- Polaris Research Centre, Dept. of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza, 1, 20126, Milan, Italy
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Bassig BA, Dai Y, Vermeulen R, Ren D, Hu W, Duan H, Niu Y, Xu J, Shiels MS, Kemp TJ, Pinto LA, Fu W, Meliefste K, Zhou B, Yang J, Ye M, Jia X, Meng T, Wong JYY, Bin P, Hosgood HD, Hildesheim A, Silverman DT, Rothman N, Zheng Y, Lan Q. Occupational exposure to diesel engine exhaust and alterations in immune/inflammatory markers: a cross-sectional molecular epidemiology study in China. Carcinogenesis 2017; 38:1104-1111. [PMID: 28968774 PMCID: PMC5862277 DOI: 10.1093/carcin/bgx081] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Accepted: 07/28/2017] [Indexed: 12/22/2022] Open
Abstract
The relationship between diesel engine exhaust (DEE), a known lung carcinogen, and immune/inflammatory markers that have been prospectively associated with lung cancer risk is not well understood. To provide insight into these associations, we conducted a cross-sectional molecular epidemiology study of 54 males highly occupationally exposed to DEE and 55 unexposed male controls from representative workplaces in China. We measured plasma levels of 64 immune/inflammatory markers in all subjects using Luminex bead-based assays, and compared our findings to those from a nested case-control study of these markers and lung cancer risk, which had been conducted among never-smoking women in Shanghai using the same multiplex panels. Levels of nine markers that were associated with lung cancer risk in the Shanghai study were altered in DEE-exposed workers in the same direction as the lung cancer associations. Among these, associations with the levels of CRP (β= -0.53; P = 0.01) and CCL15/MIP-1D (β = 0.20; P = 0.02) were observed in workers exposed to DEE and with increasing elemental carbon exposure levels (Ptrends <0.05) in multivariable linear regression models. Levels of a third marker positively associated with an increased lung cancer risk, CCL2/MCP-1, were higher among DEE-exposed workers compared with controls in never and former smokers, but not in current smokers (Pinteraction = 0.01). The immunological differences in these markers in DEE-exposed workers are consistent with associations observed for lung cancer risk in a prospective study of Chinese women and may provide some insight into the mechanistic processes by which DEE causes lung cancer.
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Affiliation(s)
- Bryan A Bassig
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
| | - Yufei Dai
- Key Laboratory of Chemical Safety and Health, National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Roel Vermeulen
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
| | - Dianzhi Ren
- Chaoyang Center for Disease Control and Prevention, Chaoyang, Liaoning, China
| | - Wei Hu
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
| | - Huawei Duan
- Key Laboratory of Chemical Safety and Health, National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Yong Niu
- Key Laboratory of Chemical Safety and Health, National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Jun Xu
- Hong Kong University, Hong Kong, Hong Kong
| | - Meredith S Shiels
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
| | - Troy J Kemp
- HPV Immunology Laboratory, Leidos Biomedical Research Inc., Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Ligia A Pinto
- HPV Immunology Laboratory, Leidos Biomedical Research Inc., Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Wei Fu
- Chaoyang Center for Disease Control and Prevention, Chaoyang, Liaoning, China
| | - Kees Meliefste
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
| | - Baosen Zhou
- China Medical University, Shenyang, Liaoning, China
| | - Jufang Yang
- Chaoyang Center for Disease Control and Prevention, Chaoyang, Liaoning, China
| | - Meng Ye
- Key Laboratory of Chemical Safety and Health, National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xiaowei Jia
- Key Laboratory of Chemical Safety and Health, National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Tao Meng
- Key Laboratory of Chemical Safety and Health, National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Jason YY Wong
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
| | - Ping Bin
- Key Laboratory of Chemical Safety and Health, National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - H Dean Hosgood
- Division of Epidemiology, Albert Einstein College of Medicine, New York, NY, USA
| | - Allan Hildesheim
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
| | - Debra T Silverman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
| | - Nathaniel Rothman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
| | - Yuxin Zheng
- Key Laboratory of Chemical Safety and Health, National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Qing Lan
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
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Stone V, Miller MR, Clift MJD, Elder A, Mills NL, Møller P, Schins RPF, Vogel U, Kreyling WG, Alstrup Jensen K, Kuhlbusch TAJ, Schwarze PE, Hoet P, Pietroiusti A, De Vizcaya-Ruiz A, Baeza-Squiban A, Teixeira JP, Tran CL, Cassee FR. Nanomaterials Versus Ambient Ultrafine Particles: An Opportunity to Exchange Toxicology Knowledge. ENVIRONMENTAL HEALTH PERSPECTIVES 2017; 125:106002. [PMID: 29017987 PMCID: PMC5933410 DOI: 10.1289/ehp424] [Citation(s) in RCA: 212] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 08/12/2016] [Accepted: 08/30/2016] [Indexed: 05/05/2023]
Abstract
BACKGROUND A rich body of literature exists that has demonstrated adverse human health effects following exposure to ambient air particulate matter (PM), and there is strong support for an important role of ultrafine (nanosized) particles. At present, relatively few human health or epidemiology data exist for engineered nanomaterials (NMs) despite clear parallels in their physicochemical properties and biological actions in in vitro models. OBJECTIVES NMs are available with a range of physicochemical characteristics, which allows a more systematic toxicological analysis. Therefore, the study of ultrafine particles (UFP, <100 nm in diameter) provides an opportunity to identify plausible health effects for NMs, and the study of NMs provides an opportunity to facilitate the understanding of the mechanism of toxicity of UFP. METHODS A workshop of experts systematically analyzed the available information and identified 19 key lessons that can facilitate knowledge exchange between these discipline areas. DISCUSSION Key lessons range from the availability of specific techniques and standard protocols for physicochemical characterization and toxicology assessment to understanding and defining dose and the molecular mechanisms of toxicity. This review identifies a number of key areas in which additional research prioritization would facilitate both research fields simultaneously. CONCLUSION There is now an opportunity to apply knowledge from NM toxicology and use it to better inform PM health risk research and vice versa. https://doi.org/10.1289/EHP424.
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Affiliation(s)
- Vicki Stone
- Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot-Watt University, Edinburgh, Scotland, UK
| | - Mark R Miller
- Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, Scotland, UK
| | - Martin J D Clift
- Adolphe Merkle Institute, University of Fribourg, Fribourg, Switzerland
- Swansea University Medical School, Swansea, Wales, UK
| | - Alison Elder
- University of Rochester Medical Center, Rochester, New York
| | - Nicholas L Mills
- Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, Scotland, UK
| | - Peter Møller
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Roel P F Schins
- IUF Leibniz-Institut für Umweltmedizinische Forschung, Düsseldorf, Germany
| | - Ulla Vogel
- National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Micro- and Nanotechnology, Technical University of Denmark, Lyngby, Denmark
| | - Wolfgang G Kreyling
- Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Institute of Epidemiology, Munich, Germany
| | | | - Thomas A J Kuhlbusch
- Air Quality & Sustainable Nanotechnology Unit, Institut für Energie- und Umwelttechnik e. V. (IUTA), Duisburg, Germany
- Federal Institute of Occupational Safety and Health, Duisburg, Germany
| | | | - Peter Hoet
- Center for Environment and Health, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Antonio Pietroiusti
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Andrea De Vizcaya-Ruiz
- Departmento de Toxicología, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV-IPN), México City, México
| | | | - João Paulo Teixeira
- National Institute of Health, Porto, Portugal
- Instituto de Saúde Pública da Universidade do Porto–Epidemiology (ISPUP-EPI) Unit, Porto, Portugal
| | - C Lang Tran
- Institute of Occupational Medicine, Edinburgh, Scotland, UK
| | - Flemming R Cassee
- National Institute for Public Health and the Environment, Bilthoven, Netherlands
- Institute of Risk Assessment Sciences, Utrecht University, Utrecht, Netherlands
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Fröhlich E. Hemocompatibility of inhaled environmental nanoparticles: Potential use of in vitro testing. JOURNAL OF HAZARDOUS MATERIALS 2017; 336:158-167. [PMID: 28494303 DOI: 10.1016/j.jhazmat.2017.04.041] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 03/09/2017] [Accepted: 04/14/2017] [Indexed: 06/07/2023]
Abstract
Hemocompatibility testing is an important part in the evaluation of nano-based medicines. However, it is not systematically used for the assessment of environmental particles since they do not come in contact with blood immediately. Studies on human exposure to air-borne particles and pulmonary exposure of rodents have reported alterations in blood physiology. It is not clear, whether these effects are majorly caused by tissue inflammation or translocated particles in blood. This review addresses the question, if in vitro hemocompatibility testing could help in the risk evaluation of inhaled particles. Particle blood concentrations were estimated based on exposure levels, ventilation volume, deposition rate, lung surface area, and permeability of the alveolar epithelium to particles. The categories of hemocompatibility, thrombosis, coagulation, platelets, hematology, and immunology, were introduced. Also, concentrations of ultrafine particles, silver nanoparticles, carbon nanotubes that caused adverse effects in human blood samples were compared to the estimated concentrations of translocated particles. The comparison suggested that, it is unlikely for translocated nanoparticles to be the sole cause of adverse blood effects. Nevertheless, the testing of specific hemocompatibility parameters (hemolysis and clotting) in healthy blood might help to compare biological effect of inhaled particles containing different amounts of contamination. Testing of samples from healthy and diseased persons might help to identify pathological dispositions that increase the possibility of adverse reaction of nanoparticles in blood.
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Affiliation(s)
- Eleonore Fröhlich
- Medical University of Graz, Center for Medical Research, Stiftingtalstr. 24, A-8010 Graz, Austria.
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Smyth E, Solomon A, Birrell MA, Smallwood MJ, Winyard PG, Tetley TD, Emerson M. Influence of inflammation and nitric oxide upon platelet aggregation following deposition of diesel exhaust particles in the airways. Br J Pharmacol 2017; 174:2130-2139. [PMID: 28437857 PMCID: PMC5466527 DOI: 10.1111/bph.13831] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 04/07/2017] [Accepted: 04/13/2017] [Indexed: 11/27/2022] Open
Abstract
Background and Purpose Exposure to nanoparticulate pollution has been implicated in platelet‐driven thrombotic events such as myocardial infarction. Inflammation and impairment of NO bioavailability have been proposed as potential causative mechanisms. It is unclear, however, whether airways exposure to combustion‐derived nanoparticles such as diesel exhaust particles (DEP) or carbon black (CB) can augment platelet aggregation in vivo and the underlying mechanisms remain undefined. We aimed to investigate the effects of acute lung exposure to DEP and CB on platelet activation and the associated role of inflammation and endothelial‐derived NO. Experimental Approach DEP and CB were intratracheally instilled into wild‐type (WT) and eNOS−/− mice and platelet aggregation was assessed in vivo using an established model of radio‐labelled platelet thromboembolism. The underlying mechanisms were investigated by measuring inflammatory markers, NO metabolites and light transmission aggregometry. Key Results Platelet aggregation in vivo was significantly enhanced in WT and eNOS−/− mice following acute airways exposure to DEP but not CB. CB exposure, but not DEP, was associated with significant increases in pulmonary neutrophils and IL‐6 levels in the bronchoalveolar lavage fluid and plasma of WT mice. Neither DEP nor CB affected plasma nitrate/nitrite concentration and DEP‐induced human platelet aggregation was inhibited by an NO donor. Conclusions and Implications Pulmonary exposure to DEP and subsequent platelet activation may contribute to the reports of increased cardiovascular risk, associated with exposure to airborne pollution, independent of its effects on inflammation or NO bioavailability.
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Affiliation(s)
- E Smyth
- Platelet Biology Group, National Heart and Lung Institute, Imperial College London, London, UK
| | - A Solomon
- Platelet Biology Group, National Heart and Lung Institute, Imperial College London, London, UK
| | - M A Birrell
- Respiratory Pharmacology, National Heart and Lung Institute, Imperial College London, London, UK
| | - M J Smallwood
- Inflammation Research Group, University of Exeter Medical School, Exeter, UK
| | - P G Winyard
- Inflammation Research Group, University of Exeter Medical School, Exeter, UK
| | - T D Tetley
- Lung Cell Biology Group, National Heart and Lung Institute, Imperial College London, London, UK
| | - M Emerson
- Platelet Biology Group, National Heart and Lung Institute, Imperial College London, London, UK
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Dierschke K, Isaxon C, Andersson UBK, Assarsson E, Axmon A, Stockfelt L, Gudmundsson A, Jönsson BAG, Kåredal M, Löndahl J, Pagels J, Wierzbicka A, Bohgard M, Nielsen J. Acute respiratory effects and biomarkers of inflammation due to welding-derived nanoparticle aggregates. Int Arch Occup Environ Health 2017; 90:451-463. [PMID: 28258373 PMCID: PMC5486570 DOI: 10.1007/s00420-017-1209-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 02/10/2017] [Indexed: 11/26/2022]
Abstract
Purpose Welders are exposed to airborne particles from the welding environment and often develop symptoms work-related from the airways. A large fraction of the particles from welding are in the nano-size range. In this study we investigate if the welders’ airways are affected by exposure to particles derived from gas metal arc welding in mild steel in levels corresponding to a normal welding day. Method In an exposure chamber, 11 welders with and 10 welders without work-related symptoms from the lower airways and 11 non-welders without symptoms, were exposed to welding fumes (1 mg/m3) and to filtered air, respectively, in a double-blind manner. Symptoms from eyes and upper and lower airways and lung function were registered. Blood and nasal lavage (NL) were sampled before, immediately after and the morning after exposure for analysis of markers of oxidative stress. Exhaled breath condensate (EBC) for analysis of leukotriene B4 (LT-B4) was sampled before, during and immediately after exposure. Results No adverse effects of welding exposure were found regarding symptoms and lung function. However, EBC LT-B4 decreased significantly in all participants after welding exposure compared to filtered air. NL IL-6 increased immediately after exposure in the two non-symptomatic groups and blood neutrophils tended to increase in the symptomatic welder group. The morning after, neutrophils and serum IL-8 had decreased in all three groups after welding exposure. Remarkably, the symptomatic welder group had a tenfold higher level of EBC LT-B4 compared to the two groups without symptoms. Conclusion Despite no clinical adverse effects at welding, changes in inflammatory markers may indicate subclinical effects even at exposure below the present Swedish threshold limit (8 h TWA respirable dust).
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Affiliation(s)
- Katrin Dierschke
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 85, Lund, Sweden.
| | - Christina Isaxon
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
| | - Ulla B K Andersson
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 85, Lund, Sweden
| | - Eva Assarsson
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 85, Lund, Sweden
| | - Anna Axmon
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 85, Lund, Sweden
| | - Leo Stockfelt
- Occupational and Environmental Medicine, Gothenburg University, Gothenburg, Sweden
| | - Anders Gudmundsson
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
| | - Bo A G Jönsson
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 85, Lund, Sweden
| | - Monica Kåredal
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 85, Lund, Sweden
| | - Jakob Löndahl
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
| | - Joakim Pagels
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
| | - Aneta Wierzbicka
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
| | - Mats Bohgard
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden
| | - Jörn Nielsen
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, 221 85, Lund, Sweden
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Stiegel MA, Pleil JD, Sobus JR, Stevens T, Madden MC. Linking physiological parameters to perturbations in the human exposome: Environmental exposures modify blood pressure and lung function via inflammatory cytokine pathway. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2017; 80:485-501. [PMID: 28696913 PMCID: PMC6089069 DOI: 10.1080/15287394.2017.1330578] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Human biomonitoring is an indispensable tool for evaluating the systemic effects derived from external stressors including environmental pollutants, chemicals from consumer products, and pharmaceuticals. The aim of this study was to explore consequences of environmental exposures to diesel exhaust (DE) and ozone (O3) and ultimately to interpret these parameters from the perspective of in vitro to in vivo extrapolation. In particular, the objective was to use cytokine expression at the cellular level as a biomarker for physiological systemic responses such as blood pressure and lung function at the systemic level. The values obtained could ultimately link in vivo behavior to simpler in vitro experiments where cytokines are a measured parameter. Human exposures to combinations of DE and O3 and the response correlations between forced exhaled volume in 1 second (FEV1), forced vital capacity (FVC), systolic and diastolic blood pressure (SBP and DBP, respectively), and 10 inflammatory cytokines in blood (interleukins 1β, 2, 4, 5, 8, 10, 12p70 and 13, IFN-γ, and TNF-α) were determined in 15 healthy human volunteers. Results across all exposures revealed that certain individuals displayed greater inflammatory responses compared to the group and, generally, there was more between-person variation in the responses. Evidence indicates that individuals are more stable within themselves and are more likely to exhibit responses independent of one another. Data suggest that in vitro findings may ultimately be implemented to elucidate underlying adverse outcome pathways (AOP) for linking high-throughput toxicity tests to physiological in vivo responses. Further, this investigation supports assessing subjects based upon individual responses as a complement to standard longitudinal (pre vs. post) intervention grouping strategies. Ultimately, it may become possible to predict a physiological (systemic) response based upon cellular-level (in vitro) observations.
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Affiliation(s)
- Matthew A Stiegel
- a Duke University Medical Center , Department of Occupational and Environmental Safety , Durham , NC , US
| | - Joachim D Pleil
- b United States Environmental Protection Agency, National Exposure Research Lab , Exposure Methods and Measurement Division , Research Triangle Park , NC , US
| | - Jon R Sobus
- b United States Environmental Protection Agency, National Exposure Research Lab , Exposure Methods and Measurement Division , Research Triangle Park , NC , US
| | - Tina Stevens
- c United States Environmental Protection Agency , National Health and Environmental Effects Research Lab, Environmental Public Health Division , Chapel Hill , NC , US
| | - Michael C Madden
- c United States Environmental Protection Agency , National Health and Environmental Effects Research Lab, Environmental Public Health Division , Chapel Hill , NC , US
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Chen R, Hu B, Liu Y, Xu J, Yang G, Xu D, Chen C. Beyond PM2.5: The role of ultrafine particles on adverse health effects of air pollution. Biochim Biophys Acta Gen Subj 2016; 1860:2844-55. [DOI: 10.1016/j.bbagen.2016.03.019] [Citation(s) in RCA: 193] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 03/04/2016] [Accepted: 03/11/2016] [Indexed: 12/29/2022]
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Shaheen HM, Onoda A, Shinkai Y, Nakamura M, El-Ghoneimy AA, El-Sayed YS, Takeda K, Umezawa M. The ceramide inhibitor fumonisin B1 mitigates the pulmonary effects of low-dose diesel exhaust inhalation in mice. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 132:390-396. [PMID: 27376354 DOI: 10.1016/j.ecoenv.2016.06.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 06/15/2016] [Accepted: 06/17/2016] [Indexed: 06/06/2023]
Abstract
Recent studies have suggested that inhalation of diesel exhaust (DE), a major source of air pollution, results in pulmonary alterations; however, the effects of DE at low concentrations are poorly understood. Therefore, this study was conducted to elucidate the pulmonary effects of low-level exposure to DE and the potential role of a ceramide de novo biosynthesis inhibitor, fumonisin B1 (FB1) to ameliorate the DE-toxicity. Male C57BL/6J mice underwent 1- or 7-day experiments (4 equal groups/experiment) and were assigned to the control, DE (0.1mg/m(3)), FB1 (6.75mg/kg body weight SC at days 0, 3 and 6) or DE+FB1 groups. DE and/or FB1 treatment had no effect on the expression of Nos2, a biomarker of oxidative stress. Ceramide production in the bronchial epithelial cells and Sphk1 mRNA expression were induced in the lung after the 7-day DE exposure and were partially suppressed by the FB1 treatment. Additionally, the effects of DE on SP-A and SP-D mRNA expression were also suppressed by the FB1 treatment. These results suggest that ceramide and Sphk1 may be sensitive biomarkers for low-level DE-induced pulmonary effects. Collectively, ceramide likely contributes to the DE-induced early stage of airway inflammation, which is considered a potential pulmonary target during low-level DE exposure.
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Affiliation(s)
- Hazem M Shaheen
- The Center for Environmental Health Science for the Next Generation, Research Institute for Science and Technology, Organization for Research Advancement, Tokyo University of Science, Japan; Department of Pharmacology, Faculty of Veterinary Medicine, Damanhour University, Egypt.
| | - Atsuto Onoda
- The Center for Environmental Health Science for the Next Generation, Research Institute for Science and Technology, Organization for Research Advancement, Tokyo University of Science, Japan; Department of Hygienic Chemistry, Graduate School of Pharmaceutical Sciences, Tokyo University of Science, Japan; Research Fellow of Japan Society for the Promotion of Science, Japan.
| | - Yusuke Shinkai
- The Center for Environmental Health Science for the Next Generation, Research Institute for Science and Technology, Organization for Research Advancement, Tokyo University of Science, Japan.
| | - Masayuki Nakamura
- Department of Hygienic Chemistry, Graduate School of Pharmaceutical Sciences, Tokyo University of Science, Japan.
| | - Ashraf A El-Ghoneimy
- The Center for Environmental Health Science for the Next Generation, Research Institute for Science and Technology, Organization for Research Advancement, Tokyo University of Science, Japan; Department of Pharmacology, Faculty of Veterinary Medicine, South Valley University, Egypt.
| | - Yasser S El-Sayed
- Department of Veterinary Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Damanhour University, Egypt.
| | - Ken Takeda
- The Center for Environmental Health Science for the Next Generation, Research Institute for Science and Technology, Organization for Research Advancement, Tokyo University of Science, Japan.
| | - Masakazu Umezawa
- The Center for Environmental Health Science for the Next Generation, Research Institute for Science and Technology, Organization for Research Advancement, Tokyo University of Science, Japan.
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