1
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Li HY, Makatsoris C, Forbes B. Particulate bioaerogels for respiratory drug delivery. J Control Release 2024; 370:195-209. [PMID: 38641021 DOI: 10.1016/j.jconrel.2024.04.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 04/05/2024] [Accepted: 04/11/2024] [Indexed: 04/21/2024]
Abstract
The bioaerogel microparticles have been recently developed for respiratory drug delivery and attract fast increasing interests. These highly porous microparticles have ultralow density and hence possess much reduced aerodynamic diameter, which favour them with greatly enhanced dispersibility and improved aerosolisation behaviour. The adjustable particle geometric dimensions by varying preparation methods and controlling operation parameters make it possible to fabricate bioaerogel microparticles with accurate sizes for efficient delivery to the targeted regions of respiratory tract (i.e. intranasal and pulmonary). Additionally, the technical process can provide bioaerogel microparticles with the opportunities of accommodating polar, weak polar and non-polar drugs at sufficient amount to satisfy clinical needs, and the adsorbed drugs are primarily in the amorphous form that potentially can facilitate drug dissolution and improve bioavailability. Finally, the nature of biopolymers can further offer additional advantageous characteristics of improved mucoadhesion, sustained drug release and subsequently elongated time for continuous treatment on-site. These fascinating features strongly support bioaerogel microparticles to become a novel platform for effective delivery of a wide range of drugs to the targeted respiratory regions, with increased drug residence time on-site, sustained drug release, constant treatment for local and systemic diseases and anticipated better-quality of therapeutic effects.
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Affiliation(s)
- Hao-Ying Li
- Institute of Pharmaceutical Science, King's College London, London SE1 9NH, United Kingdom.
| | - Charalampos Makatsoris
- Department of Engineering, Faculty of Natural & Mathematical Sciences, King's College London, WC2R 2LS, United Kingdom
| | - Ben Forbes
- Institute of Pharmaceutical Science, King's College London, London SE1 9NH, United Kingdom.
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2
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Santacruz-Márquez R, Neff AM, Mourikes VE, Fletcher EJ, Flaws JA. The effects of inhaled pollutants on reproduction in marginalized communities: a contemporary review. Inhal Toxicol 2024; 36:286-303. [PMID: 37075037 PMCID: PMC10584991 DOI: 10.1080/08958378.2023.2197941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 03/25/2023] [Indexed: 04/20/2023]
Abstract
Important differences in health that are closely linked with social disadvantage exist within and between countries. According to the World Health Organization, life expectancy and good health continue to increase in many parts of the world, but fail to improve in other parts of the world, indicating that differences in life expectancy and health arise due to the circumstances in which people grow, live, work, and age, and the systems put in place to deal with illness. Marginalized communities experience higher rates of certain diseases and more deaths compared to the general population, indicating a profound disparity in health status. Although several factors place marginalized communities at high risk for poor health outcomes, one important factor is exposure to air pollutants. Marginalized communities and minorities are exposed to higher levels of air pollutants than the majority population. Interestingly, a link exists between air pollutant exposure and adverse reproductive outcomes, suggesting that marginalized communities may have increased reproductive disorders due to increased exposure to air pollutants compared to the general population. This review summarizes different studies showing that marginalized communities have higher exposure to air pollutants, the types of air pollutants present in our environment, and the associations between air pollution and adverse reproductive outcomes, focusing on marginalized communities.
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Affiliation(s)
| | - Alison M. Neff
- Department of Comparative Biosciences, University of Illinois Urbana-Champaign
| | | | - Endia J. Fletcher
- Department of Comparative Biosciences, University of Illinois Urbana-Champaign
| | - Jodi A. Flaws
- Department of Comparative Biosciences, University of Illinois Urbana-Champaign
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3
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Ponugoti A, Ngo H, Stinnett S, Vajzovic L. Chronic Effects of e-Cigarette Aerosol Inhalation on Macular Perfusion Assessed Using OCT Angiography. JOURNAL OF VITREORETINAL DISEASES 2024; 8:21-28. [PMID: 38223771 PMCID: PMC10786087 DOI: 10.1177/24741264231205071] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
Purpose: To determine whether there are significant differences in the microvasculature and central retinal thickness (CRT) between e-cigarette users (user group) and age-matched nonusers (control group) using optical coherence tomography angiography (OCTA). Methods: In this prospective cross-sectional observational study, OCTA images were acquired of 52 eyes of 26 users and 25 eyes of 25 age-matched nonusers. Daily e-cigarette users with no ocular history were identified from provider information in the electronic medical record. A custom algorithm was used to calculate the foveal avascular zone (FAZ), vessel area density (VAD), and vessel length density (VLD). OCT software was used to calculate the foveal, superior, inferior, nasal, and temporal CRT. Generalized estimating equations using the Z-statistic were used to determine how the FAZ, VAD, VLD, and CRT parameters varied between groups and to assess the differential contribution of descriptive data in the user group. Results: No statistically significant difference was found between the user group and control group in the FAZ, superficial vascular complex (SVC) VAD, SVC VLD, or deep vascular complex (DVC) VAD. A statistically significant difference was found for DVC VLD (P = .002), with the user group having a slightly higher VLD on average. Superior, temporal, and inferior inner macular thicknesses were significantly thinner in the user group (P = .038, P = .012, and P = .035, respectively). Conclusions: Significant negative differences were found in CRT measures but not in retinal microvasculature parameters between e-cigarette users and nonusers. Decreased inferior, temporal, and superior inner macular thickness in e-cigarette users may show an early chronic structural effect that warrants further assessment of retinal effects as this population ages and continues to use e-cigarettes.
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Affiliation(s)
- Arathi Ponugoti
- Department of Ophthalmology, Duke University Eye Center, Durham, NC, USA
| | - Hoan Ngo
- School of Biomedical Engineering, International University–VNU HCMC, Ho Chi Minh City, Vietnam
| | - Sandra Stinnett
- Department of Ophthalmology, Duke University Eye Center, Durham, NC, USA
| | - Lejla Vajzovic
- Department of Ophthalmology, Duke University Eye Center, Durham, NC, USA
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4
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Wright S, Levermore J, Ishikawa Y. Application of Infrared and Near-Infrared Microspectroscopy to Microplastic Human Exposure Measurements. APPLIED SPECTROSCOPY 2023; 77:1105-1128. [PMID: 37792505 PMCID: PMC10566227 DOI: 10.1177/00037028231199772] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 08/05/2023] [Indexed: 10/06/2023]
Abstract
Microplastic pollution is a global issue for the environment and human health. The potential for human exposure to microplastic through drinking water, dust, food, and air raises concern, since experimental in vitro and in vivo toxicology studies suggest there is a level of hazard associated with high microplastic concentrations. However, to infer the likelihood of hazards manifesting in the human population, a robust understanding of exposure concentrations is needed. Infrared and near-infrared microspectroscopies have routinely been used to analyze microplastic in different exposure matrices (air, dust, food, and water), with technological advances coupling multivariate and machine learning algorithms to spectral data. This focal point article will highlight the application of infrared and Raman modes of spectroscopy to detect, characterize, and quantify microplastic particles, with a focus on human exposure to microplastic. Methodologies and state-of-the-art approaches will be reported and potential confounding variables and challenges in microplastic analysis discussed. The article provides an up-to-date review of the literature on microplastic exposure measurement using (near) infrared spectroscopies as an analytical tool, highlighting the recent advances in this rapidly advancing field.
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Affiliation(s)
- Stephanie Wright
- Environmental Research Group, School of Public Health, Imperial College London, London UK
- MRC Centre for Environment and Health, School of Public Health, Imperial College London, London UK
- NIHR Health Protection Research Unit in Environmental Exposures and Health, School of Public Health, Imperial College London, London UK
| | - Joseph Levermore
- Environmental Research Group, School of Public Health, Imperial College London, London UK
- MRC Centre for Environment and Health, School of Public Health, Imperial College London, London UK
| | - Yukari Ishikawa
- Environmental Research Group, School of Public Health, Imperial College London, London UK
- MRC Centre for Environment and Health, School of Public Health, Imperial College London, London UK
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5
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Guo Y, Liu Y, Xiang T, Li J, Lv M, Yan Y, Zhao J, Sun J, Yang X, Liao C, Fu J, Shi J, Qu G, Jiang G. Disposable Polypropylene Face Masks: A Potential Source of Micro/Nanoparticles and Organic Contaminates in Humans. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:5739-5750. [PMID: 36989422 DOI: 10.1021/acs.est.2c06802] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
We have been effectively protected by disposable propylene face masks during the COVID-19 pandemic; however, they may pose health risks due to the release of fine particles and chemicals. We measured micro/nanoparticles and organic chemicals in disposable medical masks, surgical masks, and (K)N95 respirators. In the breathing-simulation experiment, no notable differences were found in the total number of particles among mask types or between breathing intensities. However, when considering subranges, <2.5 μm particles accounted for ∼90% of the total number of micro/nanoparticles. GC-HRMS-based suspect screening tentatively revealed 79 (semi)volatile organic compounds in masks, with 18 being detected in ≥80% of samples and 44 in ≤20% of samples. Three synthetic phenolic antioxidants were quantified, and AO168 reached a median concentration of 2968 ng/g. By screening particles collected from bulk mask fabrics, we detected 18 chemicals, including four commonly detected in masks, suggesting chemical partition between the particles and the fabric fibers and chemical exposure via particle inhalation. These particles and chemicals are believed to originate from raw materials, intentionally and nonintentionally added substances in mask production, and their transformation products. This study highlights the need to study the long-term health risks associated with mask wearing and raises concerns over mask quality control.
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Affiliation(s)
- Yunhe Guo
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yanna Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Tongtong Xiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Junya Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Meilin Lv
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Yuhao Yan
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jing Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Institute of Environment and Health, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310000, China
| | - Jiazheng Sun
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
| | - Xiaoxi Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Chunyang Liao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Institute of Environment and Health, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310000, China
- Institute of Environment and Health, Jianghan University, Wuhan 430056, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianjie Fu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Institute of Environment and Health, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310000, China
- Institute of Environment and Health, Jianghan University, Wuhan 430056, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianbo Shi
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
- Institute of Environment and Health, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310000, China
- Institute of Environment and Health, Jianghan University, Wuhan 430056, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guangbo Qu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Institute of Environment and Health, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310000, China
- Institute of Environment and Health, Jianghan University, Wuhan 430056, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
- Institute of Environment and Health, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310000, China
- Institute of Environment and Health, Jianghan University, Wuhan 430056, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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6
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Liu H, Zhang X, Sun Z, Chen Y. Ambient Fine Particulate Matter and Cancer: Current Evidence and Future Perspectives. Chem Res Toxicol 2023; 36:141-156. [PMID: 36688945 DOI: 10.1021/acs.chemrestox.2c00216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The high incidence of cancer has placed an enormous health and economic burden on countries around the world. In addition to evidence of epidemiological studies, conclusive evidence from animal experiments and mechanistic studies have also shown that morbidity and mortality of some cancers can be attributed to ambient fine particulate matter (PM2.5) exposure, especially in lung cancer. However, the underlying carcinogenetic mechanisms of PM2.5 remain unclear. Furthermore, in terms of risks of other types of cancer, both epidemiological and mechanistic evidence are more limited and scattered, and the results are also inconsistent. In order to sort out the carcinogenic effect of PM2.5, this paper reviews the association of cancers with PM2.5 based on epidemiological and biological evidence including genetic, epigenetic, and molecular mechanisms. The limitations of existing researches and the prospects for the future are also well clarified in this paper to provide insights for future studies.
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Affiliation(s)
- Hanrui Liu
- Department of Toxicology and Sanitary Chemistry, School of Public Health, and Beijing Key Laboratory of Environment Toxicology, Capital Medical University, Beijing 100069, PR China
| | - Xiaoke Zhang
- Department of Toxicology and Sanitary Chemistry, School of Public Health, and Beijing Key Laboratory of Environment Toxicology, Capital Medical University, Beijing 100069, PR China
| | - Zhiwei Sun
- Department of Toxicology and Sanitary Chemistry, School of Public Health, and Beijing Key Laboratory of Environment Toxicology, Capital Medical University, Beijing 100069, PR China
| | - Yueyue Chen
- Department of Toxicology and Sanitary Chemistry, School of Public Health, and Beijing Key Laboratory of Environment Toxicology, Capital Medical University, Beijing 100069, PR China
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7
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Abstract
Air pollution is a complex mixture of gases and particulate matter, with adsorbed organic and inorganic contaminants, to which exposure is lifelong. Epidemiological studies increasingly associate air pollution with multiple neurodevelopmental disorders and neurodegenerative diseases, findings supported by experimental animal models. This breadth of neurotoxicity across these central nervous system diseases and disorders likely reflects shared vulnerability of their inflammatory and oxidative stress-based mechanisms and a corresponding ability to produce brain metal dyshomeo-stasis. Future research to define the responsible contaminants of air pollution underlying this neurotoxicity is critical to understanding mechanisms of these diseases and disorders and protecting public health.
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Affiliation(s)
- Deborah A Cory-Slechta
- Department of Environmental Medicine, University of Rochester School of Medicine, Rochester, New York, USA;
| | - Alyssa Merrill
- Department of Environmental Medicine, University of Rochester School of Medicine, Rochester, New York, USA;
| | - Marissa Sobolewski
- Department of Environmental Medicine, University of Rochester School of Medicine, Rochester, New York, USA;
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8
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He X, Wang C, Wang Y, Yu J, Zhao Y, Li J, Hussain M, Liu B. Rapid classification of micro-particles using multi-angle dynamic light scatting and machine learning approach. Front Bioeng Biotechnol 2022; 10:1097363. [PMID: 36588961 PMCID: PMC9800508 DOI: 10.3389/fbioe.2022.1097363] [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: 11/13/2022] [Accepted: 12/06/2022] [Indexed: 12/23/2022] Open
Abstract
The rapid classification of micro-particles has a vast range of applications in biomedical sciences and technology. In the given study, a prototype has been developed for the rapid detection of particle size using multi-angle dynamic light scattering and a machine learning approach by applying a support vector machine. The device consisted of three major parts: a laser light, an assembly of twelve sensors, and a data acquisition system. The laser light with a wavelength of 660 nm was directed towards the prepared sample. The twelve different photosensors were arranged symmetrically surrounding the testing sample to acquire the scattered light. The position of the photosensor was based on the Mie scattering theory to detect the maximum light scattering. In this study, three different spherical microparticles with sizes of 1, 2, and 4 μm were analyzed for the classification. The real-time light scattering signals were collected from each sample for 30 min. The power spectrum feature was evaluated from the acquired waveforms, and then recursive feature elimination was utilized to filter the features with the highest correlation. The machine learning classifiers were trained using the features with optimum conditions and the classification accuracies were evaluated. The results showed higher classification accuracies of 94.41%, 94.20%, and 96.12% for the particle sizes of 1, 2, and 4 μm, respectively. The given method depicted an overall classification accuracy of 95.38%. The acquired results showed that the developed system can detect microparticles within the range of 1-4 μm, with detection limit of 0.025 mg/ml. Therefore, the current study validated the performance of the device, and the given technique can be further applied in clinical applications for the detection of microbial particles.
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Affiliation(s)
- Xu He
- Jiangsu Province Engineering Research Center of Smart Wearable and Rehabilitation Devices, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, China
| | - Chao Wang
- Jiangsu Province Engineering Research Center of Smart Wearable and Rehabilitation Devices, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, China
| | - Yichuan Wang
- Jiangsu Province Engineering Research Center of Smart Wearable and Rehabilitation Devices, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, China
| | - Junxiao Yu
- Jiangsu Province Engineering Research Center of Smart Wearable and Rehabilitation Devices, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, China
| | - Yanfeng Zhao
- Jiangsu Province Engineering Research Center of Smart Wearable and Rehabilitation Devices, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, China
| | - Jianqing Li
- Jiangsu Province Engineering Research Center of Smart Wearable and Rehabilitation Devices, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, China,The State Key Laboratory of Bioelectronics, School of Instrument Science and Engineering, Southeast University, Nanjing, China
| | - Mubashir Hussain
- Jiangsu Province Engineering Research Center of Smart Wearable and Rehabilitation Devices, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, China,Changzhou Medical Center, The Affiliated Changzhou Second People’s Hospital of Nanjing Medical University, Changzhou Second People’s Hospital, Nanjing Medical University, Changzhou, China,*Correspondence: Mubashir Hussain, ; Bin Liu,
| | - Bin Liu
- Jiangsu Province Engineering Research Center of Smart Wearable and Rehabilitation Devices, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, China,*Correspondence: Mubashir Hussain, ; Bin Liu,
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9
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Abstract
Lunar dust (LD), the component of lunar regolith with particle sizes less than 20 μm, covers the surface of the Moon. Due to its fineness, jagged edges, and electrostatic charge, LD adheres to and coats almost any surface it contacts. As a result, LD poses known risks to the proper functioning of electronic and mechanical equipment on the lunar surface. However, its mechanical irritancy and chemical reactivity may also pose serious health risks to humans by a number of mechanisms. While Apollo astronauts reported mild short-lived respiratory symptoms, the spectrum of health effects associated with high-dose acute exposure or chronic low-dose exposure are not yet well-understood. This paper explores known and potential human risks of exposure to LD which are thought to be important in planning upcoming lunar missions and planetary surface work.
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10
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Mbazima SJ. Health risk assessment of particulate matter 2.5 in an academic metallurgy workshop. INDOOR AIR 2022; 32:e13111. [PMID: 36168227 PMCID: PMC9825944 DOI: 10.1111/ina.13111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 08/28/2022] [Accepted: 08/31/2022] [Indexed: 06/16/2023]
Abstract
Exposure to indoor PM2.5 is associated with allergies, eye and skin irritation, lung cancer, and cardiopulmonary diseases. To control indoor PM2.5 and protect the health of occupants, exposure and health studies are necessary. In this study, exposure to PM2.5 released in an academic metallurgy workshop was assessed and a health risk assessment was conducted for male and female students and technicians. Polycarbonate membrane filters and an active pump operating at a flow rate of 2.5 L/min were used to collect PM2.5 from Monday to Friday for 3 months (August-October 2020) from 08:00-16:00. PM2.5 mass concentrations were obtained gravimetrically, and the Multiple-Path Particle Dosimetry model was used to predict the deposition, retention, and clearance of PM2.5 in the respiratory tract system. The risk of developing carcinogenic and non-carcinogenic effects among students and technicians was determined. The average PM2.5 mass concentration for August was 32.6 μg/m3 32.8 μg/m3 for September, and 32.2 μg/m3 for October. The head region accounted for the highest deposition fraction (49.02%), followed by the pulmonary (35.75%) and tracheobronchial regions (15.26%). Approximately 0.55 mg of PM2.5 was still retained in the alveolar region 7 days after exposure. The HQ for male and female students was <1 while that of male and female technicians was >1, suggesting that technicians are at risk of developing non-carcinogenic health effects compared with students. The results showed a risk of developing carcinogenic health effects among male and female technicians (>1 × 10-5 ); however, there was no excess cancer risk for students (<1 × 10-6 ). This study highlights the importance of exposure and health studies in academic micro-environments such as metallurgy workshops which are often less researched, and exposure is underestimated. The results also indicated the need to implement control measures to protect the health of the occupants and ensure that the workshop rules are adhered to.
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Affiliation(s)
- Setlamorago Jackson Mbazima
- School of Geography, Archaeology and Environmental StudiesUniversity of the WitwatersrandJohannesburgSouth Africa
- Department of Environmental Sciences, College of Agriculture and Environmental SciencesUniversity of South AfricaJohannesburgSouth Africa
- Department of Toxicology and BiochemistryNational Institute for Occupational HealthDivision of the National Health Laboratory ServiceJohannesburgSouth Africa
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11
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Electronic Cigarette and Atherosclerosis: A Comprehensive Literature Review of Latest Evidences. Int J Vasc Med 2022; 2022:4136811. [PMID: 36093338 PMCID: PMC9453087 DOI: 10.1155/2022/4136811] [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: 03/15/2022] [Revised: 07/29/2022] [Accepted: 08/17/2022] [Indexed: 11/18/2022] Open
Abstract
Coronary artery diseases (CAD), also known as coronary heart disease (CHD), are the world’s leading cause of death. The basis of coronary artery disease is the narrowing of the heart coronary artery lumen due to atherosclerosis. The use of electronic cigarettes has increased significantly over the years. However, harmful effects of electronic cigarettes are still not firm. The aim of this article is to review the impact of electronic cigarette and its role in the pathogenesis of atherosclerosis from recent studies. The results showed that several chemical compounds, such as nicotine, propylene glycol, particulate matters, heavy metals, and flavorings, in electronic cigarette induce atherosclerosis with each molecular mechanism that lead to atherosclerosis progression by formation of ROS, endothelial dysfunction, and inflammation. Further research is still needed to determine the exact mechanism and provide more clinical evidence.
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12
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Wu T, Tong M, Chu A, Wu K, Niu X, Zhang Z. PM2.5-Induced Programmed Myocardial Cell Death via mPTP Opening Results in Deteriorated Cardiac Function in HFpEF Mice. Cardiovasc Toxicol 2022; 22:746-762. [PMID: 35593990 DOI: 10.1007/s12012-022-09753-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 05/06/2022] [Indexed: 11/03/2022]
Abstract
PM2.5 exposure can induce or exacerbate heart failure and is associated with an increased risk of heart failure hospitalization and mortality; however, the underlying mechanisms remain unclear. This study focuses on the potential mechanisms underlying PM2.5 induction of cardiomyocyte programmed necrosis as well as its promotion of cardiac function impairment in a mouse model of heart failure with preserved ejection fraction (HFpEF). HFpEF mice were exposed to concentrated ambient PM2.5 (CAP) (CAP group) or filtered air (FA) (FA group) for 6 weeks. Changes in myocardial pathology and cardiac function were documented for comparisons between the two groups. In vitro experiments were performed to measure oxidative stress and mitochondrial permeability transition pore (mPTP) dynamics in H9C2 cells following 24 h exposure to PM2.5. Additionally, co-immunoprecipitation was conducted to detect p53 and cyclophilin D (CypD) interactions. The results showed exposure to CAP promoted cardiac function impairment in HFpEF mice. Myocardial pathology analysis and in vitro experiments demonstrated that PM2.5 led to mitochondrial damage in cardiomyocytes and, eventually, their necrosis. Moreover, our experiments also suggested that PM2.5 increases mitochondrial reactive oxygen species (ROS), induces DNA oxidative damage, and decreases the inner mitochondrial membrane potential (ΔΨm). This indicates the presence of mPTP opening. Co-immunoprecipitation results showed a p53/CypD interaction in the myocardial tissue of HFpEF mice in the CAP group. Inhibition of CypD by cyclosporin A was found to reverse PM2.5-induced mPTP opening and H9C2 cell death. In conclusion, PM2.5 induces mPTP opening to stimulate mitochondria-mediated programmed necrosis of cardiomyocytes, and it might exacerbate cardiac function impairment in HFpEF mice.
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Affiliation(s)
- Tingting Wu
- The First Clinical Medical College of Lanzhou University, Lanzhou, 730000, China
- The Second Hospital of Lanzhou University, Lanzhou, 730030, China
| | - Minghui Tong
- The Second Hospital of Lanzhou University, Lanzhou, 730030, China
| | - Aiai Chu
- Department of Cardiology, Gansu Provincial Hospital, Lanzhou, 730000, China
| | - Kaiyue Wu
- Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200030, China
| | - Xiaowei Niu
- Heart Center, The First Hospital of Lanzhou University, Lanzhou, 730000, China
| | - Zheng Zhang
- Heart Center, The First Hospital of Lanzhou University, Lanzhou, 730000, China.
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13
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Sahin C, Rastgeldi Dogan T, Yildiz M, Sofuoglu SC. Indoor environmental quality in naturally ventilated schools of a dusty region: Excess health risks and effect of heating and desert dust transport. INDOOR AIR 2022; 32:e13068. [PMID: 35904387 DOI: 10.1111/ina.13068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 05/24/2022] [Accepted: 05/28/2022] [Indexed: 06/15/2023]
Abstract
Indoor air quality (IAQ) is impacted by polluted outdoor air in naturally ventilated schools, especially in places where both anthropogenic and natural sources of ambient air pollution exist. CO2 , PM2.5 , PM10 , temperature, relative humidity (RH), and noise were measured in five naturally ventilated primary schools in City of Sanliurfa, in a dusty region of Turkey, Southeast Anatolia. Excess risk levels were estimated for particulate matter. Investigation was conducted through an educational year including two seasons in terms of anthropogenic effect, that is, heating/non-heating, and natural effect, that is, desert dust transport/non-dust transport. The median CO2 concentration was measured to be >1000 ppm in all seasons/schools. Temperature and RH fell out of the comfort zone in October-December, during which pollutant concentrations were considerably increased, specifically in November, that heating and dust transport periods coincide. The overall mean indoor PM10 and PM2.5 levels were 58 and 31.8 μg/m3 , respectively. Risk assessment indicate that both short (incidence of asthma symptoms in asthmatic children) and long-term (prevalence of bronchitis) effects are considerable with 10.9 (2.4-19.6)% and 19.5 (2.2-38.8)%, respectively. The findings suggest that mechanical ventilation retrofitting with particle filtration is needed to mitigate potential negative health consequences on children.
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Affiliation(s)
- Cagri Sahin
- Department of Environmental Engineering, Izmir Institute of Technology, Izmir, Turkey
| | | | - Melek Yildiz
- Department of Environmental Engineering, Harran University, Sanliurfa, Turkey
| | - Sait C Sofuoglu
- Department of Environmental Engineering, Izmir Institute of Technology, Izmir, Turkey
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14
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Fathollahi A, Makoundou C, Coupe SJ, Sangiorgi C. Leaching of PAHs from rubber modified asphalt pavements. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 826:153983. [PMID: 35189212 DOI: 10.1016/j.scitotenv.2022.153983] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/14/2022] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
The present study aimed to, for the first time, quantify the total content of 16 priority EPA PAHs in end-of-life tyre derived crumb rubber granulates and various manufactured rubberised asphalt mix designs. After identifying the availability of 16 EPA PAHs, the leaching behaviour of rubberised asphalt specimens, were evaluated using the Dynamic Surface Leaching Test (DSLT) based on CEN/TS 16637-2:2014 standard. This was prior to modelling the release mechanisms of PAHs by utilizing a mathematical diffusion-controlled leaching model. According to the results, the total content of 16 EPA PAHs in crumb rubber granulates ranged between 0.061 and 8.322 μg/g, which were associated with acenaphthene and pyrene, respectively. The total content of PAHs in rubberised asphalt specimens varied between 0.019 and 4.992 μg/g depending on the volume of crumb rubber granulates in the asphalt concrete mix design, and type of binder. Results of the leaching experiments revealed that the highest leached PAHs were benzo[b]fluoranthene, benzo[k]fluoranthene and naphthalene with a 64-days cumulative release per specimen surface area > 1 μg/m2. Acenaphthylene, fluoranthene, fluorene and indeno[1,2,3-c,d]pyrene were released in cumulative concentrations between 0.1 and 1 μg/m2. The PAHs with a cumulative release potential below 0.1 μg/m2 during DSLT were benzo[a]anthracene, benzo[a]pyrene, benzo[g,h,i]perylene and chrysene. The diffusion coefficients, which were calculated by mathematical modelling of DSLT data, revealed that the leaching process of 16 EPA PAHs from surface of rubberised asphalt concrete mix designs fitted all the criteria set by the NEN 7345 standard for diffusion-controlled leaching during all stages of leaching experiments.
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Affiliation(s)
- Alireza Fathollahi
- Centre for Agroecology Water and Resilience (CAWR), Coventry University, Wolston Lane, Ryton on Dunsmore, CV8 3LG, UK.
| | - Christina Makoundou
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy
| | - Stephen J Coupe
- Centre for Agroecology Water and Resilience (CAWR), Coventry University, Wolston Lane, Ryton on Dunsmore, CV8 3LG, UK
| | - Cesare Sangiorgi
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy
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15
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Luderer U, Lim J, Ortiz L, Nguyen JD, Shin JH, Allen BD, Liao LS, Malott K, Perraud V, Wingen LM, Arechavala RJ, Bliss B, Herman DA, Kleinman MT. Exposure to environmentally relevant concentrations of ambient fine particulate matter (PM 2.5) depletes the ovarian follicle reserve and causes sex-dependent cardiovascular changes in apolipoprotein E null mice. Part Fibre Toxicol 2022; 19:5. [PMID: 34996492 PMCID: PMC8740366 DOI: 10.1186/s12989-021-00445-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 12/23/2021] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Fine particulate matter (PM2.5) exposure accelerates atherosclerosis and contains known ovotoxic chemicals. However, effects of exposure to PM2.5 on the finite ovarian follicle pool have hardly been investigated, nor have interactions between ovarian and cardiovascular effects. We hypothesized that subchronic inhalation exposure to human-relevant concentrations of PM2.5 results in destruction of ovarian follicles via apoptosis induction, as well as accelerated recruitment of primordial follicles into the growing pool. Further, we hypothesized that destruction of ovarian follicles enhances the adverse cardiovascular effects of PM2.5 in females. RESULTS Hyperlipidemic apolipoprotein E (Apoe) null ovary-intact or ovariectomized female mice and testis-intact male mice were exposed to concentrated ambient PM2.5 or filtered air for 12 weeks, 5 days/week for 4 h/day using a versatile aerosol concentration enrichment system. Primordial, primary, and secondary ovarian follicle numbers were decreased by 45%, 40%, and 17%, respectively, in PM2.5-exposed ovary-intact mice compared to controls (P < 0.05). The percentage of primary follicles with granulosa cells positive for the mitosis marker Ki67 was increased in the ovaries from PM2.5-exposed females versus controls (P < 0.05), consistent with increased recruitment of primordial follicles into the growing pool. Exposure to PM2.5 increased the percentages of primary and secondary follicles with DNA damage, assessed by γH2AX immunostaining (P < 0.05). Exposure to PM2.5 increased the percentages of apoptotic antral follicles, determined by TUNEL and activated caspase 3 immunostaining (P < 0.05). Removal of the ovaries and PM2.5-exposure exacerbated the atherosclerotic effects of hyperlipidemia in females (P < 0.05). While there were statistically significant changes in blood pressure and heart rate variability in PM2.5-compared to Air-exposed gonad-intact males and females and ovariectomized females, the changes were not consistent between exposure years and assessment methods. CONCLUSIONS These results demonstrate that subchronic PM2.5 exposure depletes the ovarian reserve by increasing recruitment of primordial follicles into the growing pool and increasing apoptosis of growing follicles. Further, PM2.5 exposure and removal of the ovaries each increase atherosclerosis progression in Apoe-/- females. Premature loss of ovarian function is associated with increased risk of osteoporosis, cardiovascular disease and Alzheimer's disease in women. Our results thus support possible links between PM2.5 exposure and other adverse health outcomes in women.
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Affiliation(s)
- Ulrike Luderer
- grid.266093.80000 0001 0668 7243Department of Environmental and Occupational Health, University of California Irvine, 100 Theory Drive, Suite 100, Irvine, CA 92617 USA ,grid.266093.80000 0001 0668 7243Center for Occupational and Environmental Health, University of California Irvine, 100 Theory Drive, Suite 100, Irvine, CA 92617 USA ,grid.266093.80000 0001 0668 7243Department of Developmental and Cell Biology, University of California Irvine, Irvine, CA 92617 USA ,grid.266093.80000 0001 0668 7243Department of Medicine, University of California Irvine, Irvine, CA 92617 USA
| | - Jinhwan Lim
- grid.266093.80000 0001 0668 7243Department of Environmental and Occupational Health, University of California Irvine, 100 Theory Drive, Suite 100, Irvine, CA 92617 USA
| | - Laura Ortiz
- grid.266093.80000 0001 0668 7243Department of Medicine, University of California Irvine, Irvine, CA 92617 USA
| | - Johnny D. Nguyen
- grid.266093.80000 0001 0668 7243Department of Medicine, University of California Irvine, Irvine, CA 92617 USA
| | - Joyce H. Shin
- grid.266093.80000 0001 0668 7243Department of Environmental and Occupational Health, University of California Irvine, 100 Theory Drive, Suite 100, Irvine, CA 92617 USA ,grid.266093.80000 0001 0668 7243Department of Medicine, University of California Irvine, Irvine, CA 92617 USA
| | - Barrett D. Allen
- grid.266093.80000 0001 0668 7243Department of Environmental and Occupational Health, University of California Irvine, 100 Theory Drive, Suite 100, Irvine, CA 92617 USA
| | - Lisa S. Liao
- grid.266093.80000 0001 0668 7243Department of Medicine, University of California Irvine, Irvine, CA 92617 USA
| | - Kelli Malott
- grid.266093.80000 0001 0668 7243Department of Environmental and Occupational Health, University of California Irvine, 100 Theory Drive, Suite 100, Irvine, CA 92617 USA ,grid.266093.80000 0001 0668 7243Department of Developmental and Cell Biology, University of California Irvine, Irvine, CA 92617 USA
| | - Veronique Perraud
- grid.266093.80000 0001 0668 7243Department of Chemistry, University of California Irvine, Irvine, CA 92617 USA
| | - Lisa M. Wingen
- grid.266093.80000 0001 0668 7243Department of Chemistry, University of California Irvine, Irvine, CA 92617 USA
| | - Rebecca J. Arechavala
- grid.266093.80000 0001 0668 7243Department of Environmental and Occupational Health, University of California Irvine, 100 Theory Drive, Suite 100, Irvine, CA 92617 USA ,grid.266093.80000 0001 0668 7243Department of Medicine, University of California Irvine, Irvine, CA 92617 USA
| | - Bishop Bliss
- grid.266093.80000 0001 0668 7243Department of Environmental and Occupational Health, University of California Irvine, 100 Theory Drive, Suite 100, Irvine, CA 92617 USA ,grid.266093.80000 0001 0668 7243Department of Medicine, University of California Irvine, Irvine, CA 92617 USA
| | - David A. Herman
- grid.266093.80000 0001 0668 7243Department of Medicine, University of California Irvine, Irvine, CA 92617 USA
| | - Michael T. Kleinman
- grid.266093.80000 0001 0668 7243Department of Environmental and Occupational Health, University of California Irvine, 100 Theory Drive, Suite 100, Irvine, CA 92617 USA ,grid.266093.80000 0001 0668 7243Center for Occupational and Environmental Health, University of California Irvine, 100 Theory Drive, Suite 100, Irvine, CA 92617 USA ,grid.266093.80000 0001 0668 7243Department of Medicine, University of California Irvine, Irvine, CA 92617 USA
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16
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Vo TTT, Huang HW, Wee Y, Feng SW, Cheng HC, Tuan VP, Lee IT. Surfactin reduces particulate matter-induced VCAM-1-dependent monocyte adhesion in human gingival fibroblasts by increasing Nrf2-dependent HO-1 expression. J Periodontal Res 2021; 57:115-130. [PMID: 34716926 DOI: 10.1111/jre.12944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/19/2021] [Accepted: 10/13/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND OBJECTIVES The mechanisms of particulate matter (PM) toxicity involve the generation of ROS and upregulation of proinflammatory molecules. Nrf2 is a multifunctional cytoprotective transcription factor that regulates the expression of various antioxidant, anti-inflammatory, and detoxifying molecules, such as HO-1. As surfactin has potential to induce Nrf2 activation and HO-1 expression, this study aimed to investigate the anti-inflammatory effects of surfactin on PM-exposed human gingival fibroblasts (HGFs) and signaling pathways engaged by surfactin. MATERIALS AND METHODS Human gingival fibroblasts were challenged by PM with or without surfactin pretreatment. The expression of Nrf2, HO-1, VCAM-1, and other molecules was determined by western blot, real-time PCR, or ELISA. Human monocytic THP-1 cells labeled with fluorescent reagent were added to HGFs, and the cell adhesion was assessed. ROS generation and NADPH oxidase activity were also measured. The involvement of Nrf2/HO-1 and ROS signaling pathways was investigated by treating HGFs with specific pathway interventions, genetically or pharmacologically. One dose of surfactin was given to mice before PM treatment to explore its in vivo effect on VCAM-1 expression in gingival tissues. RESULTS Particulate matter led to VCAM-1-dependent monocyte adhesion in HGFs, which was regulated by PKCα/NADPH oxidase/ROS/STAT1/IL-6 pathway. Surfactin could attenuate monocyte adhesion by disrupting this VCAM-1-dependent pathway. Additionally, surfactin promoted Nrf2-dependent HO-1 expression in HGFs, mitigating VCAM-1 expression. PM-treated mice exhibited the lower expression of IL-6 and VCAM-1 in gingival tissues if they previously received surfactin. CONCLUSION Surfactin exerts anti-inflammatory effects against PM-induced inflammatory responses in HGFs by inhibiting VCAM-1-dependent pathway and inducing Nrf2/HO-1 axis.
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Affiliation(s)
- Thi Thuy Tien Vo
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Han Wei Huang
- Department of Dentistry, Taipei Medical University Hospital, Taipei, Taiwan
| | - Yinshen Wee
- Department of Pathology, University of Utah, Salt Lake City, Utah, USA
| | - Sheng-Wei Feng
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.,Department of Dentistry, Taipei Medical University Hospital, Taipei, Taiwan
| | - Hsin-Chung Cheng
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.,Department of Dentistry, Taipei Medical University Hospital, Taipei, Taiwan
| | - Vo Phuoc Tuan
- Endoscopy Department, Cho Ray Hospital, Ho Chi Minh City, Vietnam
| | - I-Ta Lee
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
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17
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Sun K, Song Y, He F, Jing M, Tang J, Liu R. A review of human and animals exposure to polycyclic aromatic hydrocarbons: Health risk and adverse effects, photo-induced toxicity and regulating effect of microplastics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 773:145403. [PMID: 33582342 DOI: 10.1016/j.scitotenv.2021.145403] [Citation(s) in RCA: 139] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/18/2021] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are one of the most widely distributed persistent organic pollutants (POPs) in the environmental media. PAHs have been widely concerned due to their significant health risk and adverse effects to human and animals. Currently, the main sources of PAHs in the environment are the incomplete combustion of fossil fuels, as well as municipal waste incineration and agricultural non-surface source emissions. In this work, the scope of our attention includes 16 typical PAHs themselves without involving their metabolites and industrial by-products. Exposure of human and animals to PAHs can lead to a variety of adverse effects, including carcinogenicity and teratogenicity, genotoxicity, reproductive- and endocrine-disrupting effects, immunotoxicity and neurotoxicity, the type and severity of which depend on a variety of factors. On the other hand, the regulatory effect of microplastics (MPs) on the bio-toxicity and bioaccumulation capacity of PAHs has now gradually attracted attention. We critically reviewed the adsorption capacity and mechanisms of MPs on PAHs as well as the effects of MPs on PAHs toxicity, thus highlighting the importance of paying attention to the joint bio-toxicity caused by PAHs-MPs interactions. In addition, due to the extensive nature of the common exposure pathway of PAHs and ultraviolet ray, an accurate understanding of biological processes exposed to both PAHs and UV light is necessary to develop effective protective strategies. Finally, based on the above critical review, we highlighted the research gaps and pointed out the priority of further studies.
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Affiliation(s)
- Kailun Sun
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Yan Song
- School of Water Conservancy and Environment, University of Jinan, Jinan, Shandong Province 250022, China
| | - Falin He
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Mingyang Jing
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Jingchun Tang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Research Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China.
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18
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Dimitrov A, Zanini M, Zucchi H, Boudah S, Lima J, Soeur J, Marrot L. Vitamin C prevents epidermal damage induced by PM-associated pollutants and UVA1 combined exposure. Exp Dermatol 2021; 30:1693-1698. [PMID: 33704829 DOI: 10.1111/exd.14315] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 02/12/2021] [Accepted: 03/01/2021] [Indexed: 01/07/2023]
Abstract
Particulate matter is suspected to be substantially involved in pollution-induced health concerns. In fact, ultrafine particles (UFPs) contain polycyclic aromatic hydrocarbons (PAHs) known as mutagenic, cytotoxic and sometimes phototoxic. Since UFPs reach blood circulation from lung alveoli, deep skin is very likely contaminated by PAHs coming from either skin surface or blood. As photoreactive, benzo(a)pyrene (BaP) or indenopyrene (IcdP) is involved in the interplay between pollution and sunlight. In order to better characterize this process, experiments were carried out on reconstructed human epidermis (RHE) in a protocol mimicking realistic exposure. Concentrations of PAHs comparable to those generally reported in blood were used together with chronic irradiation to low dose UVA1. On a histological level, damaged cells mainly accumulated in a suprabasal situation, thus reducing living epidermis thickness. Stress markers such as IL1-α or MMP3 secretion increased, and surprisingly, the histological position of Transglutaminase-1 within epidermis was disturbed, whereas position of other differentiation markers (keratin-10, filaggrin, loricrin) remained unchanged. When vitamin C was added in culture medium, a very significant protection involving all markers was noticed. In conclusion, we provide here a model of interest to understand the epidermal deleterious consequences of pollution and to select efficient protective compounds.
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Affiliation(s)
| | | | - Hélène Zucchi
- L'OREAL R&I Advanced Research, Aulnay sous Bois, France
| | - Samia Boudah
- L'OREAL R&I Advanced Research, Aulnay sous Bois, France
| | - Joaquim Lima
- L'OREAL R&I Advanced Research, Aulnay sous Bois, France
| | - Jérémie Soeur
- L'OREAL R&I Advanced Research, Aulnay sous Bois, France
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19
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Lequy E, Siemiatycki J, de Hoogh K, Vienneau D, Dupuy JF, Garès V, Hertel O, Christensen JH, Zhivin S, Goldberg M, Zins M, Jacquemin B. Contribution of Long-Term Exposure to Outdoor Black Carbon to the Carcinogenicity of Air Pollution: Evidence regarding Risk of Cancer in the Gazel Cohort. ENVIRONMENTAL HEALTH PERSPECTIVES 2021; 129:37005. [PMID: 33759553 PMCID: PMC7989243 DOI: 10.1289/ehp8719] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 02/19/2021] [Accepted: 02/22/2021] [Indexed: 05/31/2023]
Abstract
BACKGROUND Black carbon (BC), a component of fine particulate matter [particles with an aerodynamic diameter ≤2.5 μm (PM2.5)], may contribute to carcinogenic effects of air pollution. Until recently however, there has been little evidence to evaluate this hypothesis. OBJECTIVE This study aimed to estimate the associations between long-term exposure to BC and risk of cancer. This study was conducted within the French Gazel cohort of 20,625 subjects. METHODS We assessed exposure to BC by linking subjects' histories of residential addresses to a map of European black carbon levels in 2010 with back- and forward-extrapolation between 1989 and 2015. We used extended Cox models, with attained age as time-scale and time-varying cumulative exposure to BC, adjusted for relevant sociodemographic and lifestyle variables. To consider latency between exposure and cancer diagnosis, we implemented a 10-y lag, and as a sensitivity analysis, a lag of 2 y. To isolate the effect of BC from that of total PM2.5, we regressed BC on PM2.5 and used the residuals as the exposure variable. RESULTS During the 26-y follow-up period, there were 3,711 incident cancer cases (all sites combined) and 349 incident lung cancers. Median baseline exposure in 1989 was 2.65 10-5/m [interquartile range (IQR): 2.23-3.33], which generally slightly decreased over time. Using 10 y as a lag-time in our models, the adjusted hazard ratio per each IQR increase of the natural log-transformed cumulative BC was 1.17 (95% confidence interval: 1.06, 1.29) for all-sites cancer combined and 1.31 (0.93, 1.83) for lung cancer. Associations with BC residuals were also positive for both outcomes. Using 2 y as a lag-time, the results were similar. DISCUSSION Our findings for a cohort of French adults suggest that BC may partly explain the association between PM2.5 and lung cancer. Additional studies are needed to confirm our results and further disentangle the effects of BC, total PM2.5, and other constituents. https://doi.org/10.1289/EHP8719.
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Affiliation(s)
- Emeline Lequy
- UMS 011, Institut national de la santé et de la recherché médicale (Inserm), Villejuif, France
- Centre de recherche du centre hospitalier de l’université de Montréal, Université de Montréal, Québec, Canada
| | - Jack Siemiatycki
- Centre de recherche du centre hospitalier de l’université de Montréal, Université de Montréal, Québec, Canada
| | - Kees de Hoogh
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Danielle Vienneau
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | | | - Valérie Garès
- UMR 6625 IRMAR, INSA, CNRS, Université de Rennes, Rennes, France
| | - Ole Hertel
- Department of Environmental Science, Aarhus University, Roskilde, Denmark
| | | | - Sergey Zhivin
- UMS 011, Institut national de la santé et de la recherché médicale (Inserm), Villejuif, France
| | - Marcel Goldberg
- UMS 011, Institut national de la santé et de la recherché médicale (Inserm), Villejuif, France
| | - Marie Zins
- UMS 011, Institut national de la santé et de la recherché médicale (Inserm), Villejuif, France
| | - Bénédicte Jacquemin
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) – UMR_S 1085, Rennes, France
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20
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Kobos L, Shannahan J. Particulate matter inhalation and the exacerbation of cardiopulmonary toxicity due to metabolic disease. Exp Biol Med (Maywood) 2021; 246:822-834. [PMID: 33467887 DOI: 10.1177/1535370220983275] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Particulate matter is a significant public health issue in the United States and globally. Inhalation of particulate matter is associated with a number of systemic and organ-specific adverse health outcomes, with the pulmonary and cardiovascular systems being particularly vulnerable. Certain subpopulations are well-recognized as being more susceptible to inhalation exposures, such as the elderly and those with pre-existing respiratory disease. Metabolic syndrome is becoming increasingly prevalent in our society and has known adverse effects on the heart, lungs, and vascular systems. The limited evaluations of individuals with metabolic syndromehave demonstrated that theymay compose a sensitive subpopulation to particulate exposures. However, the toxicological mechanisms responsible for this increased vulnerability are not fully understood. This review evaluates the currently available literature regarding how the response of an individual's pulmonary and cardiovascular systems is influenced by metabolic syndrome and metabolic syndrome-associated conditions such as hypertension, dyslipidemia, and diabetes. Further, we will discuss potential therapeutic agents and targets for the alleviation and treatment of particulate-matter induced metabolic illness. The information reviewed here may contribute to the understanding of metabolic illness as a risk factor for particulate matter exposure and further the development of therapeutic approaches to treat vulnerable subpopulations, such as those with metabolic diseases.
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Affiliation(s)
- Lisa Kobos
- School of Health Sciences, College of Human and Health Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Jonathan Shannahan
- School of Health Sciences, College of Human and Health Sciences, Purdue University, West Lafayette, IN 47907, USA
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21
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Manangama G, Gramond C, Audignon-Durand S, Baldi I, Fabro-Peray P, Gilg Soit Ilg A, Guénel P, Lebailly P, Luce D, Stücker I, Brochard P, Lacourt A. Occupational exposure to unintentionally emitted nanoscale particles and risk of cancer: From lung to central nervous system - Results from three French case-control studies. ENVIRONMENTAL RESEARCH 2020; 191:110024. [PMID: 32777272 DOI: 10.1016/j.envres.2020.110024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 07/20/2020] [Accepted: 07/28/2020] [Indexed: 06/11/2023]
Abstract
OBJECTIVES Nanoscale particles (1-100 nm) can be of natural origin, and either intentionally or unintentionally produced by human activities. Toxicological data have suggested a possible carcinogenic effect of such particles. The aim of this study was to estimate the association between occupational exposure to nanoscale particles and risk of lung cancer, pleural mesothelioma and brain tumors in adults. METHODS Three French population-based case-control studies were analyzed: 1) the ICARE study including 2029 lung cancer cases and 2591 controls; 2) the PNSM study including 371 pleural mesothelioma cases and 730 controls and 3) the CERENAT study including 257 brain tumor cases and 511 controls. Occupational exposure to unintentionally emitted nanoscale particles (UNPs) was retrospectively assessed by a job exposure matrix providing a probability and a frequency of exposure. RESULTS In adjusted analyses among men, significant associations between occupational exposure to UNPs and lung cancer (OR = 1.51; 95% CI: 1.22-1.86 and brain tumors (OR = 1.69; 95% CI: 1.17-2.44) were observed. No increased OR was observed for pleural mesothelioma (OR = 0.78; 95% CI: 0.46-1.33). CONCLUSION This is the first study showing positive associations between occupational exposure to UNPs and increased risk of lung cancer and brain tumors. These preliminary results should encourage further epidemiological research.
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Affiliation(s)
- Guyguy Manangama
- Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, Epicene Team, UMR 1219, F-33000, Bordeaux, France
| | - Céline Gramond
- Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, Epicene Team, UMR 1219, F-33000, Bordeaux, France
| | - Sabyne Audignon-Durand
- Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, Epicene Team, UMR 1219, F-33000, Bordeaux, France
| | - Isabelle Baldi
- Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, Epicene Team, UMR 1219, F-33000, Bordeaux, France
| | | | | | - Pascal Guénel
- Centre de Recherche en Epidémiologie et Santé des Populations (CESP), Cancer and Environment Team, Université Paris-Sud, Université Paris-Saclay, F-94800, Villejuif, France
| | - Pierre Lebailly
- ANTICIPE, U1086 INSERM, Université de Caen Normandie, And Centre de Lutte Contre le Cancer François Baclesse, F-14000, Caen, France
| | - Danièle Luce
- Université de Rennes, Inserm, EHESP, Irset (Institut de Recherche en Santé, Environnement et Travail) - UMR_S, 1085, Pointe-à-Pitre, France
| | - Isabelle Stücker
- Centre de Recherche en Epidémiologie et Santé des Populations (CESP), Cancer and Environment Team, Université Paris-Sud, Université Paris-Saclay, F-94800, Villejuif, France
| | - Patrick Brochard
- Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, Epicene Team, UMR 1219, F-33000, Bordeaux, France
| | - Aude Lacourt
- Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, Epicene Team, UMR 1219, F-33000, Bordeaux, France.
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The Impact of Decarbonization Scenarios on Air Quality and Human Health in Poland—Analysis of Scenarios up to 2050. ATMOSPHERE 2020. [DOI: 10.3390/atmos11111222] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Poland faces two great challenges in the field of environment and atmosphere protection: improving air quality, especially by reducing particulate matter (PM) emissions, and reducing relatively high greenhouse gas emissions. The aim of this research was to investigate how the fuel and technological transformations in the power, road transport, and household and tertiary sectors aimed at reducing carbon dioxide (CO2) emissions in Poland would affect air quality, human health, and the associated external costs. The study was conducted for 2050 while considering 2015 as the base year. Ambient PM2.5 (particles with a diameter of less than 2.5 µm) concentration was used as a proxy air quality indicator. The analysis was based on decarbonization scenarios developed within the REFLEX Project (Analysis of the European energy system under the aspects of flexibility and technological progress). The three scenarios of the REFLEX Project focused on the reduction of CO2 emissions up to 2050 from various sectors, mainly by the means of fuel and technological switches. This also led to the changes in the emission levels of pollutants that directly affect air quality, which were calculated with the use of fuel- and technology-specific emission factors. Next, for each emission scenario, ambient concentrations of PM2.5 and others pollutants were calculated with the use of the Polyphemus—an Eulerian-type air quality modelling system. Subsequently, the health impact of population exposed to air pollution and associated external costs were calculated using the πESA (Platform for Integrated Energy System Analysis) platform. The health impacts considered were the number of years of life lost, restricted activity days, and number of chronic bronchitis cases. The results showed that the largest reductions in both greenhouse gas and PM emissions—and consequently improvements of air quality resulting in a decrease of negative impacts on human health and a decrease of external costs—can be achieved by the transformation of heat production in the household and tertiary sector. The results also showed that the decrease in PM2.5 emissions envisaged in the analyzed scenarios in 2050 will lead to a reduction in the number of lost years of life by about 35 thousand and an avoidance of external costs by EUR 2.4 billion.
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Cellular and Molecular Mechanisms of Environmental Pollutants on Hematopoiesis. Int J Mol Sci 2020; 21:ijms21196996. [PMID: 32977499 PMCID: PMC7583016 DOI: 10.3390/ijms21196996] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/20/2020] [Accepted: 09/21/2020] [Indexed: 02/07/2023] Open
Abstract
Hematopoiesis is a complex and intricate process that aims to replenish blood components in a constant fashion. It is orchestrated mostly by hematopoietic progenitor cells (hematopoietic stem cells (HSCs)) that are capable of self-renewal and differentiation. These cells can originate other cell subtypes that are responsible for maintaining vital functions, mediate innate and adaptive immune responses, provide tissues with oxygen, and control coagulation. Hematopoiesis in adults takes place in the bone marrow, which is endowed with an extensive vasculature conferring an intense flow of cells. A myriad of cell subtypes can be found in the bone marrow at different levels of activation, being also under constant action of an extensive amount of diverse chemical mediators and enzymatic systems. Bone marrow platelets, mature erythrocytes and leukocytes are delivered into the bloodstream readily available to meet body demands. Leukocytes circulate and reach different tissues, returning or not returning to the bloodstream. Senescent leukocytes, specially granulocytes, return to the bone marrow to be phagocytized by macrophages, restarting granulopoiesis. The constant high production and delivery of cells into the bloodstream, alongside the fact that blood cells can also circulate between tissues, makes the hematopoietic system a prime target for toxic agents to act upon, making the understanding of the bone marrow microenvironment vital for both toxicological sciences and risk assessment. Environmental and occupational pollutants, therapeutic molecules, drugs of abuse, and even nutritional status can directly affect progenitor cells at their differentiation and maturation stages, altering behavior and function of blood compounds and resulting in impaired immune responses, anemias, leukemias, and blood coagulation disturbances. This review aims to describe the most recently investigated molecular and cellular toxicity mechanisms of current major environmental pollutants on hematopoiesis in the bone marrow.
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Sou T, Bergström CAS. Contemporary Formulation Development for Inhaled Pharmaceuticals. J Pharm Sci 2020; 110:66-86. [PMID: 32916138 DOI: 10.1016/j.xphs.2020.09.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/02/2020] [Accepted: 09/03/2020] [Indexed: 12/22/2022]
Abstract
Pulmonary delivery has gained increased interests over the past few decades. For respiratory conditions, targeted drug delivery directly to the site of action can achieve a high local concentration for efficacy with reduced systemic exposure and adverse effects. For systemic conditions, the unique physiology of the lung evolutionarily designed for rapid gaseous exchange presents an entry route for systemic drug delivery. Although the development of inhaled formulations has come a long way over the last few decades, many aspects of it remain to be elucidated. In particular, a reliable and well-understood method for in vitro-in vivo correlations remains to be established. With the rapid and ongoing advancement of technology, there is much potential to better utilise computational methods including different types of modelling and simulation approaches to support inhaled formulation development. This review intends to provide an introduction on some fundamental concepts in pulmonary drug delivery and inhaled formulation development followed by discussions on some challenges and opportunities in the translation of inhaled pharmaceuticals from preclinical studies to clinical development. The review concludes with some recent advancements in modelling and simulation approaches that could play an increasingly important role in modern formulation development of inhaled pharmaceuticals.
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Affiliation(s)
- Tomás Sou
- Drug Delivery, Department of Pharmacy, Uppsala University, Uppsala, Sweden; Pharmacometrics, Department of Pharmacy, Uppsala University, Uppsala, Sweden.
| | - Christel A S Bergström
- Drug Delivery, Department of Pharmacy, Uppsala University, Uppsala, Sweden; The Swedish Drug Delivery Center, Department of Pharmacy, Uppsala University, Uppsala, Sweden
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25
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Wehrli FW, Caporale A, Langham MC, Chatterjee S. New Insights From MRI and Cell Biology Into the Acute Vascular-Metabolic Implications of Electronic Cigarette Vaping. Front Physiol 2020; 11:492. [PMID: 32528311 PMCID: PMC7253692 DOI: 10.3389/fphys.2020.00492] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 04/22/2020] [Indexed: 11/28/2022] Open
Abstract
The popularity of electronic cigarettes (e-cigs) has grown at a startling rate since their introduction to the United States market in 2007, with sales expected to outpace tobacco products within a decade. Spurring this trend has been the notion that e-cigs are a safer alternative to tobacco-based cigarettes. However, the long-term health impacts of e-cigs are not yet known. Quantitative magnetic resonance imaging (MRI) approaches, developed in the authors’ laboratory, provide conclusive evidence of acute deleterious effects of e-cig aerosol inhalation in the absence of nicotine in tobacco-naïve subjects. Among the pathophysiologic effects observed are transient impairment of endothelial function, vascular reactivity, and oxygen metabolism. The culprits of this response are currently not fully understood but are likely due to an immune reaction caused by the aerosol containing thermal breakdown products of the e-liquid, including radicals and organic aldehydes, with particle concentrations similar to those emitted by conventional cigarettes. The acute effects observed following a single vaping episode persist for 1–3 h before subsiding to baseline and are paralleled by build-up of biological markers. Sparse data exist on long-term effects of vaping, and it is likely that repeated regular exposure to e-cig aerosol during vaping will lead to chronic conditions since there would be no return to baseline conditions as in the case of an isolated vaping episode. This brief review aims to highlight the potential of pairing MRI, with its extraordinary sensitivity to structure, physiology and metabolism at the holistic level, with biologic investigations targeting serum and cellular markers of inflammation and oxidative stress. Such a multi-modal framework should allow interpretation of the impact of e-cigarette vaping on vascular health at the organ level in the context of the underlying biological alterations. Applications of this approach to the study of other lifestyle-initiated pathologies including hypertension, hypercholesterolemia, and metabolic syndrome are indicated.
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Affiliation(s)
- Felix W Wehrli
- Laboratory for Structural Physiologic and Functional Imaging, Department of Radiology, University of Pennsylvania, Philadelphia, PA, United States
| | - Alessandra Caporale
- Laboratory for Structural Physiologic and Functional Imaging, Department of Radiology, University of Pennsylvania, Philadelphia, PA, United States
| | - Michael C Langham
- Laboratory for Structural Physiologic and Functional Imaging, Department of Radiology, University of Pennsylvania, Philadelphia, PA, United States
| | - Shampa Chatterjee
- Department of Physiology and Institute for Environmental Medicine, University of Pennsylvania, Philadelphia, PA, United States
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Lu D, Luo Q, Chen R, Zhuansun Y, Jiang J, Wang W, Yang X, Zhang L, Liu X, Li F, Liu Q, Jiang G. Chemical multi-fingerprinting of exogenous ultrafine particles in human serum and pleural effusion. Nat Commun 2020; 11:2567. [PMID: 32444803 PMCID: PMC7244483 DOI: 10.1038/s41467-020-16427-x] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 04/30/2020] [Indexed: 01/06/2023] Open
Abstract
Ambient particulate matter pollution is one of the leading causes of global disease burden. Epidemiological studies have revealed the connections between particulate exposure and cardiovascular and respiratory diseases. However, until now, the real species of ambient ultrafine particles (UFPs) in humans are still scarcely known. Here we report the discovery and characterization of exogenous nanoparticles (NPs) in human serum and pleural effusion (PE) samples collected from non-occupational subjects in a typical polluted region. We show the wide presence of NPs in human serum and PE samples with extreme diversity in chemical species, concentration, and morphology. Through chemical multi-fingerprinting (including elemental fingerprints, high-resolution structural fingerprints, and stable iron isotopic fingerprints) of NPs, we identify the sources of the NPs to be abiogenic, particularly, combustion-derived particulate emission. Our results provide evidence for the translocation of ambient UFPs into the human circulatory system, and also provide information for understanding their systemic health effects.
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Affiliation(s)
- Dawei Lu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Qian Luo
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Rui Chen
- Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, 510120, China
| | - Yongxun Zhuansun
- Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, 510120, China
| | - Jie Jiang
- Shenzhen Center for Disease Control and Prevention, Shenzhen, 518055, China
| | - Weichao Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Xuezhi Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Luyao Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Xiaolei Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Fang Li
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Qian Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. .,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China. .,Institute of Environment and Health, Jianghan University, Wuhan, 430056, China.
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. .,College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China.
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Exposure to Submicron Particles and Estimation of the Dose Received by Children in School and Non-School Environments. ATMOSPHERE 2020. [DOI: 10.3390/atmos11050485] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In the present study, the daily dose in terms of submicron particle surface area received by children attending schools located in three different areas (rural, suburban, and urban), characterized by different outdoor concentrations, was evaluated. For this purpose, the exposure to submicron particle concentration levels of the children were measured through a direct exposure assessment approach. In particular, measurements of particle number and lung-deposited surface area concentrations at “personal scale” of 60 children were performed through a handheld particle counter to obtain exposure data in the different microenvironments they resided. Such data were combined with the time–activity pattern data, characteristics of each child, and inhalation rates (related to the activity performed) to obtain the total daily dose in terms of particle surface area. The highest daily dose was estimated for children attending the schools located in the urban and suburban areas (>1000 mm2), whereas the lowest value was estimated for children attending the school located in a rural area (646 mm2). Non-school indoor environments were recognized as the most influential in terms of children’s exposure and, thus, of received dose (>70%), whereas school environments contribute not significantly to the children daily dose, with dose fractions of 15–19% for schools located in urban and suburban areas and just 6% for the rural one. Therefore, the study clearly demonstrates that, whatever the school location, the children daily dose cannot be determined on the basis of the exposures in outdoor or school environments, but a direct assessment able to investigate the exposure of children during indoor environment is essential.
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28
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Latifovic L, Villeneuve PJ, Parent MÉ, Kachuri L, Harris SA. Silica and asbestos exposure at work and the risk of bladder cancer in Canadian men: a population-based case-control study. BMC Cancer 2020; 20:171. [PMID: 32126982 PMCID: PMC7055116 DOI: 10.1186/s12885-020-6644-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 02/17/2020] [Indexed: 12/11/2022] Open
Abstract
Background Silica and asbestos are recognized lung carcinogens. However, their role in carcinogenesis at other organs is less clear. Clearance of inhaled silica particles and asbestos fibers from the lungs may lead to translocation to sites such as the bladder where they may initiate carcinogenesis. We used data from a Canadian population-based case-control study to evaluate the associations between these workplace exposures and bladder cancer. Methods Data from a population-based case-control study were used to characterize associations between workplace exposure to silica and asbestos and bladder cancer among men. Bladder cancer cases (N = 658) and age-frequency matched controls (N = 1360) were recruited within the National Enhanced Cancer Surveillance System from eight Canadian provinces (1994–97). Exposure concentration, frequency and reliability for silica and asbestos were assigned to each job, based on lifetime occupational histories, using a combination of job-exposure profiles and expert review. Exposure was modeled as ever/never, highest attained concentration, duration (years), highest attained frequency (% worktime) and cumulative exposure. Odds ratios (OR) and their 95% confidence intervals (CI) were estimated using adjusted logistic regression. Results A modest (approximately 20%) increase in bladder cancer risk was found for ever having been exposed to silica, highest attained concentration and frequency of exposure but this increase was not statistically significant. Relative to unexposed, the odds of bladder cancer were 1.41 (95%CI: 1.01–1.98) times higher among men exposed to silica at work for ≥27 years. For asbestos, relative to unexposed, an increased risk of bladder cancer was observed for those first exposed ≥20 years ago (OR:2.04, 95%CI:1.25–3.34), those with a frequency of exposure of 5–30% of worktime (OR:1.45, 95%CI:1.06–1.98), and for those with < 10 years of exposure at low concentrations (OR:1.75, 95%CI:1.10–2.77) and the lower tertile of cumulative exposure (OR:1.69, 95%CI:1.07–2.65). However, no clear exposure-response relationships emerged. Conclusions Our results indicate a slight increase in risk of bladder cancer with exposure to silica and asbestos, suggesting that the effects of these agents are broader than currently recognized. The findings from this study inform evidence-based action to enhance cancer prevention efforts, particularly for workers in industries with regular exposure.
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Affiliation(s)
- Lidija Latifovic
- Occupational Cancer Research Centre, Cancer Care Ontario, Ontario Health, 525 University Ave, Toronto, ON, Canada.,Dalla Lana School of Public Health, University of Toronto, 155 College St, 6th floor, Toronto, ON, M5T 3M7, Canada
| | - Paul J Villeneuve
- School of Mathematics and Statistics, Carleton University, 1125 Colonel By Drive, Ottawa, ON, Canada
| | - Marie-Élise Parent
- Centre Armand-Frappier Santé Biotechnologie, Institut national de la recherche scientifique, 531 boul des Prairies, Laval, QC, Canada
| | - Linda Kachuri
- Occupational Cancer Research Centre, Cancer Care Ontario, Ontario Health, 525 University Ave, Toronto, ON, Canada.,Department of Epidemiology & Biostatistics, University of California at San Francisco, San Francisco, CA, USA
| | | | - Shelley A Harris
- Occupational Cancer Research Centre, Cancer Care Ontario, Ontario Health, 525 University Ave, Toronto, ON, Canada. .,Dalla Lana School of Public Health, University of Toronto, 155 College St, 6th floor, Toronto, ON, M5T 3M7, Canada. .,School of Mathematics and Statistics, Carleton University, 1125 Colonel By Drive, Ottawa, ON, Canada.
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Tagle M, Rojas F, Reyes F, Vásquez Y, Hallgren F, Lindén J, Kolev D, Watne ÅK, Oyola P. Field performance of a low-cost sensor in the monitoring of particulate matter in Santiago, Chile. ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:171. [PMID: 32040639 PMCID: PMC7010625 DOI: 10.1007/s10661-020-8118-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 01/23/2020] [Indexed: 06/01/2023]
Abstract
Integration of low-cost air quality sensors with the internet of things (IoT) has become a feasible approach towards the development of smart cities. Several studies have assessed the performance of low-cost air quality sensors by comparing their measurements with reference instruments. We examined the performance of a low-cost IoT particulate matter (PM10 and PM2.5) sensor in the urban environment of Santiago, Chile. The prototype was assembled from a PM10-PM2.5 sensor (SDS011), a temperature and relative humidity sensor (BME280) and an IoT board (ESP8266/Node MCU). Field tests were conducted at three regulatory monitoring stations during the 2018 austral winter and spring seasons. The sensors at each site were operated in parallel with continuous reference air quality monitors (BAM 1020 and TEOM 1400) and a filter-based sampler (Partisol 2000i). Variability between sensor units (n = 7) and the correlation between the sensor and reference instruments were examined. Moderate inter-unit variability was observed between sensors for PM2.5 (normalized root-mean-square error 9-24%) and PM10 (10-37%). The correlations between the 1-h average concentrations reported by the sensors and continuous monitors were higher for PM2.5 (R2 0.47-0.86) than PM10 (0.24-0.56). The correlations (R2) between the 24-h PM2.5 averages from the sensors and reference instruments were 0.63-0.87 for continuous monitoring and 0.69-0.93 for filter-based samplers. Correlation analysis revealed that sensors tended to overestimate PM concentrations in high relative humidity (RH > 75%) and underestimate when RH was below 50%. Overall, the prototype evaluated exhibited adequate performance and may be potentially suitable for monitoring daily PM2.5 averages after correcting for RH.
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Affiliation(s)
- Matías Tagle
- Centro Mario Molina Chile, Antonio Bellet 292, Providencia, Santiago, Chile
| | - Francisca Rojas
- Centro Mario Molina Chile, Antonio Bellet 292, Providencia, Santiago, Chile
| | - Felipe Reyes
- Centro Mario Molina Chile, Antonio Bellet 292, Providencia, Santiago, Chile
| | - Yeanice Vásquez
- Centro Mario Molina Chile, Antonio Bellet 292, Providencia, Santiago, Chile
| | - Fredrik Hallgren
- IVL Swedish Environmental Research Institute, Aschebergsgatan 44, Gothenburg, Sweden
| | - Jenny Lindén
- IVL Swedish Environmental Research Institute, Aschebergsgatan 44, Gothenburg, Sweden
| | - Dimitar Kolev
- RISE Acreo, Research Institutes of Sweden, Lindholmspiren 7 A, Gothenburg, Sweden
| | - Ågot K Watne
- Environment Administration, City of Gothenburg, Karl Johansgatan 23, Gothenburg, Sweden
| | - Pedro Oyola
- Centro Mario Molina Chile, Antonio Bellet 292, Providencia, Santiago, Chile.
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Al Zallouha M, Landkocz Y, Méausoone C, Ledoux F, Visade F, Cazier F, Martin PJ, Borgie M, Vitagliano JJ, Trémolet G, Cailliez JC, Gosset P, Courcot D, Billet S. A prospective pilot study of the T-lymphocyte response to fine particulate matter exposure. J Appl Toxicol 2020; 40:619-630. [PMID: 31975422 DOI: 10.1002/jat.3932] [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: 11/08/2022]
Abstract
Exposure to air pollution is associated with increased morbidity and mortality. Once the fine atmospheric particulate matter (FP) is inhaled, some of its compounds can pass through the lungs and reach the bloodstream where they can come into contact with immune cells. Exposure to FP particularly affects sensitive populations such as the elderly. Aging affects the immune system, making the elderly more vulnerable. The project aims to determine the effects of FP exposure on human T cells while looking for biomarkers associated with exposure. Blood samples from 95 healthy subjects in three different age groups (20-30, 45-55 and 70-85 years) were collected to determine a potential age effect. T lymphocytes were isolated to be exposed ex vivo for 72 hours to 45 μg/mL of FP collected in Dunkirk and chemically characterized. Overexpression of the CYP1A1, CYP1B1 and CYP2S1 genes was therefore measured after exposure of the T cells to FP. These genes code for enzymes known to be involved in the metabolic activation of organic compounds such as polycyclic aromatic hydrocarbons detected in the FP sample. T-cell profiling allowed us to suggest a mixed T-helper 1/2 profile caused by exposure to FP. With regard to the influence of age, we have observed differences in the expression of certain genes, as well as an increase in interleukin-4 and -13 concentrations in the elderly. These results showed that exposure of T lymphocytes to FP causes effects on both transcriptomic and cytokine secretion levels.
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Affiliation(s)
- Margueritta Al Zallouha
- EA 4492 - UCEIV - Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, Dunkerque, France
| | - Yann Landkocz
- EA 4492 - UCEIV - Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, Dunkerque, France
| | - Clémence Méausoone
- EA 4492 - UCEIV - Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, Dunkerque, France
| | - Fréderic Ledoux
- EA 4492 - UCEIV - Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, Dunkerque, France
| | - Fabien Visade
- Service de gériatrie, Groupement des Hôpitaux de l'Institut Catholique de Lille, Lille, France
| | - Fabrice Cazier
- Centre Commun de Mesures, Université Littoral Côte d'Opale, Dunkerque, France
| | - Perrine J Martin
- EA 4492 - UCEIV - Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, Dunkerque, France
| | - Mireille Borgie
- EA 4492 - UCEIV - Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, Dunkerque, France
| | - Jean-Jacques Vitagliano
- Direction de la Recherche Médicale, Groupement des Hôpitaux de l'Institut Catholique de Lille, Lille, France
| | - Gauthier Trémolet
- EA 4492 - UCEIV - Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, Dunkerque, France
| | | | - Pierre Gosset
- Service d'Anatomie pathologique, Groupement des Hôpitaux de l'Institut Catholique de Lille, Lille, France
| | - Dominique Courcot
- EA 4492 - UCEIV - Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, Dunkerque, France
| | - Sylvain Billet
- EA 4492 - UCEIV - Unité de Chimie Environnementale et Interactions sur le Vivant, Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, Dunkerque, France
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Caporale A, Langham MC, Guo W, Johncola A, Chatterjee S, Wehrli FW. Acute Effects of Electronic Cigarette Aerosol Inhalation on Vascular Function Detected at Quantitative MRI. Radiology 2019; 293:97-106. [PMID: 31429679 PMCID: PMC6776371 DOI: 10.1148/radiol.2019190562] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 06/14/2019] [Accepted: 07/03/2019] [Indexed: 11/11/2022]
Abstract
Background Previous studies showed that nicotinized electronic cigarettes (hereafter, e-cigarettes) elicit systemic oxidative stress and inflammation. However, the effect of the aerosol alone on endothelial function is not fully understood. Purpose To quantify surrogate markers of endothelial function in nonsmokers after inhalation of aerosol from nicotine-free e-cigarettes. Materials and Methods In this prospective study (from May to September 2018), nonsmokers underwent 3.0-T MRI before and after inhaling nicotine-free e-cigarette aerosol. Peripheral vascular reactivity to cuff-induced ischemia was quantified by temporally resolving blood flow velocity and oxygenation (SvO2) in superficial femoral artery and vein, respectively, along with artery luminal flow-mediated dilation. Precuff occlusion, resistivity index, baseline blood flow velocity, and SvO2 were evaluated. During reactive hyperemia, blood flow velocity yielded peak velocity, time to peak, and acceleration rate (hyperemic index); SvO2 yielded washout time of oxygen-depleted blood, rate of resaturation, and maximum SvO2 increase (overshoot). Cerebrovascular reactivity was assessed in the superior sagittal sinus, evaluating the breath-hold index. Central arterial stiffness was measured via aortic pulse wave velocity. Differences before versus after e-cigarette vaping were tested with Hotelling T2 test. Results Thirty-one healthy never-smokers (mean age, 24.3 years ± 4.3; 14 women) were evaluated. After e-cigarette vaping, resistivity index was higher (0.03 of 1.30 [2.3%]; P < .05), luminal flow-mediated dilation severely blunted (-3.2% of 9.4% [-34%]; P < .001), along with reduced peak velocity (-9.9 of 56.6 cm/sec [-17.5%]; P < .001), hyperemic index (-3.9 of 15.1 cm/sec2 [-25.8%]; P < .001), and delayed time to peak (2.1 of 7.1 sec [29.6%]; P = .005); baseline SvO2 was lower (-13 of 65 %HbO2 [-20%]; P < .001) and overshoot higher (10 of 19 %HbO2 [52.6%]; P < .001); and aortic pulse wave velocity marginally increased (0.19 of 6.05 m/sec [3%]; P = .05). Remaining parameters did not change after aerosol inhalation. Conclusion Inhaling nicotine-free electronic cigarette aerosol transiently impacted endothelial function in healthy nonsmokers. Further studies are needed to address the potentially adverse long-term effects on vascular health. © RSNA, 2019 Online supplemental material is available for this article.
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Affiliation(s)
- Alessandra Caporale
- From the Laboratory for Structural, Physiologic and Functional Imaging, Department of Radiology (A.C., M.C.L., A.J., F.W.W.), Department of Biostatistics and Epidemiology (W.G.), and Institute for Environmental Medicine and Department of Physiology (S.C.), University of Pennsylvania Perelman School of Medicine, 3400 Spruce St, Philadelphia, PA 19104
| | - Michael C. Langham
- From the Laboratory for Structural, Physiologic and Functional Imaging, Department of Radiology (A.C., M.C.L., A.J., F.W.W.), Department of Biostatistics and Epidemiology (W.G.), and Institute for Environmental Medicine and Department of Physiology (S.C.), University of Pennsylvania Perelman School of Medicine, 3400 Spruce St, Philadelphia, PA 19104
| | - Wensheng Guo
- From the Laboratory for Structural, Physiologic and Functional Imaging, Department of Radiology (A.C., M.C.L., A.J., F.W.W.), Department of Biostatistics and Epidemiology (W.G.), and Institute for Environmental Medicine and Department of Physiology (S.C.), University of Pennsylvania Perelman School of Medicine, 3400 Spruce St, Philadelphia, PA 19104
| | - Alyssa Johncola
- From the Laboratory for Structural, Physiologic and Functional Imaging, Department of Radiology (A.C., M.C.L., A.J., F.W.W.), Department of Biostatistics and Epidemiology (W.G.), and Institute for Environmental Medicine and Department of Physiology (S.C.), University of Pennsylvania Perelman School of Medicine, 3400 Spruce St, Philadelphia, PA 19104
| | - Shampa Chatterjee
- From the Laboratory for Structural, Physiologic and Functional Imaging, Department of Radiology (A.C., M.C.L., A.J., F.W.W.), Department of Biostatistics and Epidemiology (W.G.), and Institute for Environmental Medicine and Department of Physiology (S.C.), University of Pennsylvania Perelman School of Medicine, 3400 Spruce St, Philadelphia, PA 19104
| | - Felix W. Wehrli
- From the Laboratory for Structural, Physiologic and Functional Imaging, Department of Radiology (A.C., M.C.L., A.J., F.W.W.), Department of Biostatistics and Epidemiology (W.G.), and Institute for Environmental Medicine and Department of Physiology (S.C.), University of Pennsylvania Perelman School of Medicine, 3400 Spruce St, Philadelphia, PA 19104
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Chatterjee S, Tao JQ, Johncola A, Guo W, Caporale A, Langham MC, Wehrli FW. Acute exposure to e-cigarettes causes inflammation and pulmonary endothelial oxidative stress in nonsmoking, healthy young subjects. Am J Physiol Lung Cell Mol Physiol 2019; 317:L155-L166. [PMID: 31042077 DOI: 10.1152/ajplung.00110.2019] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The effects of e-cigarette (e-cig) aerosol inhalation by nonsmokers have not been examined to date. The present study was designed to evaluate the acute response to aerosol inhalation of non-nicotinized e-cigarettes in terms of oxidative stress and indices of endothelial activation in human pulmonary microvascular endothelial cells (HPMVEC). Ten smoking-naïve healthy subjects (mean age ± SD = 28.7 ± 5.5 yr) were subjected to an e-cig challenge, following which their serum was monitored for markers of inflammation [C-reactive protein (CRP) and soluble intercellular adhesion molecule (sICAM)] and nitric oxide metabolites (NOx). The oxidative stress and inflammation burden of the circulating serum on the vascular network was also assessed by measuring reactive oxygen species (ROS) production and induction of ICAM-1 expression on HPMVEC. Our results show that serum indices of oxidative stress and inflammation increased significantly (P < 0.05 as compared with baseline), reaching a peak at approximately 1-2 h post-e-cig aerosol inhalation and returning to baseline levels at 6 h. The circulatory burden of the serum (ICAM-1 and ROS) increased significantly at 2 h and returned to baseline values 6 h post-e-cig challenge. ROS production by HPMVEC was found to occur via activation of the NADPH oxidase 2 (NOX2) pathways. These findings suggest that even in the absence of nicotine, acute e-cig aerosol inhalation leads to a transient increase in oxidative stress and inflammation. This can adversely affect the vascular endothelial network by promoting oxidative stress and immune cell adhesion. Thus e-cig inhalation has the potential to drive the onset of vascular pathologies.
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Affiliation(s)
- Shampa Chatterjee
- Institute for Environmental Medicine and Department of Physiology, University of Pennsylvania Perelman School of Medicine , Philadelphia, Pennsylvania
| | - Jian-Qin Tao
- Institute for Environmental Medicine and Department of Physiology, University of Pennsylvania Perelman School of Medicine , Philadelphia, Pennsylvania
| | - Alyssa Johncola
- Laboratory for Structural, Physiologic and Functional Imaging, Department of Radiology, University of Pennsylvania Health System , Philadelphia, Pennsylvania
| | - Wensheng Guo
- Department of Biostatistics and Epidemiology, University of Pennsylvania Perelman School of Medicine , Philadelphia, Pennsylvania
| | - Alessandra Caporale
- Laboratory for Structural, Physiologic and Functional Imaging, Department of Radiology, University of Pennsylvania Health System , Philadelphia, Pennsylvania
| | - Michael C Langham
- Laboratory for Structural, Physiologic and Functional Imaging, Department of Radiology, University of Pennsylvania Health System , Philadelphia, Pennsylvania
| | - Felix W Wehrli
- Laboratory for Structural, Physiologic and Functional Imaging, Department of Radiology, University of Pennsylvania Health System , Philadelphia, Pennsylvania
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Ganguly K, Carlander U, Garessus EDG, Fridén M, Eriksson UG, Tehler U, Johanson G. Computational modeling of lung deposition of inhaled particles in chronic obstructive pulmonary disease (COPD) patients: identification of gaps in knowledge and data. Crit Rev Toxicol 2019; 49:160-173. [DOI: 10.1080/10408444.2019.1584153] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Koustav Ganguly
- Integrative Toxicology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Ulrika Carlander
- Integrative Toxicology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Estella DG Garessus
- Integrative Toxicology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Markus Fridén
- Respiratory, Inflammation and Autoimmunity IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden
- Translational PKPD, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Ulf G Eriksson
- Early Clinical Development, IMED Biotech Unit, Quantitative Clinical Pharmacology, AstraZeneca, Gothenburg, Sweden
| | - Ulrika Tehler
- Pharmaceutical Sciences, IMED Biotech Unit, Early Product Development, AstraZeneca, Gothenburg, Sweden
| | - Gunnar Johanson
- Integrative Toxicology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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Marrot L. Pollution and Sun Exposure: A Deleterious Synergy. Mechanisms and Opportunities for Skin Protection. Curr Med Chem 2019; 25:5469-5486. [PMID: 28925870 DOI: 10.2174/0929867324666170918123907] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 08/16/2017] [Accepted: 08/16/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND Pollutants are diverse chemical entities, including gases such as ozone and particulate matter PM. PM contains toxic chemicals such as polycyclic aromatic hydrocarbons (PAHs). Some PAHs can induce strong oxidative stress under UVA exposure. Pollution aggravates some skin diseases such as atopy or eczema, but epidemiological data also pointed to a correlation with early occurrence of (photo)-aging markers. OBJECTIVE This paper aims at reviewing current literature dealing with dermatological effects of pollution, either on in vitro models or using in vivo approaches (including humans). It particularly focuses on the probable deleterious synergy between pollutants and sunlight. RESULTS An exhaustive analysis of literature suggests that skin may be impacted by external stress through oxidation of some of its surface components. However, pollutants detected in plasma may also be provided to deep skin by the circulation of the blood. Oxidative stress, inflammation and metabolic impairments are among the most probable mechanisms of pollution- derived dermatological hazards. Moreover these stresses should be amplified by the deleterious synergy between pollution and sunlight. Some experiments from our lab identified few PAHs inducing a huge toxic stress, at nanomolar concentrations, when exposed to long UVA wavelengths. Prevention strategies should thus combine surface protection (long UVA sunscreens, antioxidants) and enhanced skin tissue resistance through stimulation of the natural antioxidation/detoxification pathway Nrf2. CONCLUSION In people exposed to highly polluted environments, pollutants and sunlight may synergistically damage skin, requiring a specific protection.
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Radio-sensitization efficacy of gold nanoparticles in inhalational nanomedicine and the adverse effect of nano-detachment due to coating inactivation. Phys Med 2019; 60:7-13. [PMID: 31000089 DOI: 10.1016/j.ejmp.2019.02.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 01/21/2019] [Accepted: 02/15/2019] [Indexed: 12/25/2022] Open
Abstract
Gold nanoparticles (GNPs) are an emerging area of interest in radiation therapy due to their unique radio-sensitizing properties. In the literature, the enhancing capability of GNPs is usually quantified using the metric dose enhancement ratio (DER). Traditionally, the focus of the vast majority of studies has always been on intravenous administration of GNPs. However, recent work showed the potential of using GNP inhalation, rather than intravenous injection, to enhance the dose to the lung. Yet, some of these studies are employing simplistic analytical methods to calculate DER and, thus far, there are no detailed computations of the enhancement profiles therein. Moreover, the coating on the GNP surface can be adversely affected by the large gradient of the radiation dose in the immediate vicinity of GNPs, leading to the rupture of ligands and detachment of GNPs from the surface of the membrane, and hence the loss of its efficacy. In this study, a next-generation deterministic code was used to resolve the DER profile at the interface between the septum, air, and surface of GNPs when they are attached and detached. The results show that the large values of DER in conjunction with the developed hot spots are very effective in lung treatment; on the other hand, coating rupture can lead to significant reduction in DER that may reach 64%. Thus, GNPs can be beneficial in inhalational medicine to treat lung cancer, provided that more comprehensive studies on the characteristics of the coating are addressed to maximize the radio-therapeutic benefit of GNPs.
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Subramaniam VD, Prasad SV, Banerjee A, Gopinath M, Murugesan R, Marotta F, Sun XF, Pathak S. Health hazards of nanoparticles: understanding the toxicity mechanism of nanosized ZnO in cosmetic products. Drug Chem Toxicol 2019; 42:84-93. [PMID: 30103634 DOI: 10.1080/01480545.2018.1491987] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In recent years, nanoparticles are being used extensively in personal healthcare products such as cosmetics, sunscreens, soaps, and shampoos. Particularly, metal oxide nanoparticles are gaining competence as key industrial constituents, progressing toward a remarkable rise in their applications. Zinc oxide and titanium oxide nanoparticles are the most commonly employed metal oxide nanoparticles in sunscreens, ointments, foot care, and over the counter topical products. Dermal exposure to these metal oxides predominantly occurs through explicit use of cosmetic products and airway exposure to nanoparticle dusts is primarily mediated via occupational exposure. There is a compelling need to understand the toxicity effects of nanoparticles which can easily enter the cells and induce oxidative stress. Consequently, these products have become a direct source of pollution in the environment and thereby greatly impact our ecosystem. A complete understanding of the toxicity mechanism of nano-ZnO is intended to resolve whether and to what extent such nanoparticles may pose a threat to the environment and to human beings. In this review article, we have discussed the characteristics of metal oxide nanoparticles and its applications in the cosmetic industry. We have also highlighted about their toxicity effects and their impact on human health.
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Affiliation(s)
- Vimala Devi Subramaniam
- a Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE) , Kelambakkam , Chennai , India
| | - Suhanya Veronica Prasad
- a Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE) , Kelambakkam , Chennai , India
| | - Antara Banerjee
- a Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE) , Kelambakkam , Chennai , India
| | - Madhumala Gopinath
- a Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE) , Kelambakkam , Chennai , India
| | - Ramachandran Murugesan
- a Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE) , Kelambakkam , Chennai , India
| | - Francesco Marotta
- b ReGentra R&d international for Aging Intervention , Milano-Beijing & VCC, Preventitive Medical Promotion Foundation , Beijing , China
| | - Xiao-Feng Sun
- c Department of Oncology and Department of Clinical and Experimental Medicine , University of Linköping , Linköping , Sweden
| | - Surajit Pathak
- a Chettinad Hospital & Research Institute (CHRI), Chettinad Academy of Research and Education (CARE) , Kelambakkam , Chennai , India
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Bierkandt FS, Leibrock L, Wagener S, Laux P, Luch A. The impact of nanomaterial characteristics on inhalation toxicity. Toxicol Res (Camb) 2018; 7:321-346. [PMID: 30090585 PMCID: PMC6060709 DOI: 10.1039/c7tx00242d] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 01/31/2018] [Indexed: 12/27/2022] Open
Abstract
During the last few decades, nanotechnology has evolved into a success story, apparent from a steadily increasing number of scientific publications as well as a large number of applications based on engineered nanomaterials (ENMs). Its widespread uses suggest a high relevance for consumers, workers and the environment, hence justifying intensive investigations into ENM-related adverse effects as a prerequisite for nano-specific regulations. In particular, the inhalation of airborne ENMs, being assumed to represent the most hazardous type of human exposure to these kinds of particles, needs to be scrutinized. Due to an increased awareness of possible health effects, which have already been seen in the case of ultrafine particles (UFPs), research and regulatory measures have set in to identify and address toxic implications following their almost ubiquitous occurrence. Although ENM properties differ from those of the respective bulk materials, the available assessment protocols are often designed for the latter. Despite the large benefit ensuing from the application of nanotechnology, many issues related to ENM behavior and adverse effects are not fully understood or should be examined anew. The traditional hypothesis that ENMs exhibit different or additional hazards due to their "nano" size has been challenged in recent years and ENM categorization according to their properties and toxicity mechanisms has been proposed instead. This review summarizes the toxicological effects of inhaled ENMs identified to date, elucidating the modes of action which provoke different mechanisms in the respiratory tract and their resulting effects. By linking particular mechanisms and adverse effects to ENM properties, grouping of ENMs based on toxicity-related properties is supposed to facilitate toxicological risk assessment. As intensive studies are still required to identify these "ENM classes", the need for alternatives to animal studies is evident and advances in cell-based test systems for pulmonary research are presented here. We hope to encourage the ongoing discussion about ENM risks and to advocate the further development and practice of suitable testing and grouping methods.
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Affiliation(s)
- Frank S Bierkandt
- German Federal Institute of Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany . ; Tel: (+49) 30 18412-4538
| | - Lars Leibrock
- German Federal Institute of Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany . ; Tel: (+49) 30 18412-4538
| | - Sandra Wagener
- German Federal Institute of Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany . ; Tel: (+49) 30 18412-4538
| | - Peter Laux
- German Federal Institute of Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany . ; Tel: (+49) 30 18412-4538
| | - Andreas Luch
- German Federal Institute of Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Strasse 8-10 , 10589 Berlin , Germany . ; Tel: (+49) 30 18412-4538
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Yang J, Chen Y, Yu Z, Ding H, Ma Z. Changes in gene expression in lungs of mice exposed to traffic-related air pollution. Mol Cell Probes 2018; 39:33-40. [PMID: 29621558 DOI: 10.1016/j.mcp.2018.03.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 03/16/2018] [Accepted: 03/31/2018] [Indexed: 12/28/2022]
Abstract
Long-term exposure to traffic-related pollutants can lead to a variety of respiratory diseases, including inflammation, asthma, and lung cancer; however, the underlying biological mechanisms are not fully understood. We focused on the effects of exposure to different air pollutants on the expression of genes associated with inflammatory immune responses, allergic reactions and asthma, and lung cancer. In order to understand the cellular responses induced by exposure to different traffic-related pollutants, we performed PCR array to evaluate the mRNA expression of genes associated with inflammatory immune responses, allergic reactions and asthma, and lung cancer in the lungs of mice exposed to three different environments, including the laboratory (clean air), and polluted parking garages in Foshan and Guangzhou for four weeks. Cytokines (IFN-γ, IL-4, and IL-17A) were analyzed by Flow cytometry; the morphological structures were detected by Haematoxylin and eosin (H&E) staining. Our results revealed that the main pollutant in Guangzhou was PM2.5, the main pollutants in Foshan were gaseous pollutants including CO, NOx and SO2. IFN-γ was significantly lower, and IL-4, and IL-17A were significantly higher in mice in the Guangzhou and Foshan groups compared with laboratory group. The morphological structures were damaged in Guangzhou and Foshan groups. In addition, we found that exposure to traffic-related pollutants triggered the expression of inflammatory genes (Cxcl11 and Tnfs4), allergy and asthma genes (Clca3 and Prg2), and lung cancer genes (Agr2, Col11a1, and Sostdc1). As such, our results demonstrate that persistent exposure to traffic-related pollutants may elevate the incidence of immune disorders and asthma, and may be as a risk factor for lung cancer.
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Affiliation(s)
- Jie Yang
- Department of Dermatology, Guangdong Academy of Medical Sciences and Guangdong General Hospital, Guangzhou, Guangdong 510080, PR China
| | - Yi Chen
- Department of General Internal Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, PR China
| | - Zhi Yu
- Research Center of Intelligent Transportation System, School of Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510275, PR China
| | - Hui Ding
- Research Center of Intelligent Transportation System, School of Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510275, PR China
| | - Zhongfu Ma
- Department of General Internal Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, PR China.
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Rao X, Zhong J, Brook RD, Rajagopalan S. Effect of Particulate Matter Air Pollution on Cardiovascular Oxidative Stress Pathways. Antioxid Redox Signal 2018; 28:797-818. [PMID: 29084451 PMCID: PMC5831906 DOI: 10.1089/ars.2017.7394] [Citation(s) in RCA: 200] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
SIGNIFICANCE Particulate matter (PM) air pollution is a leading cause of global cardiovascular morbidity and mortality. Understanding the biological action of PM is of particular importance in improvement of public health. Recent Advances: Both fine (PM <2.5 μM) and ultrafine particles (<0.1 μM) are widely believed to mediate their effects through redox regulated pathways. A rather simplistic graded ramp model of redox stress has been replaced by a more sophisticated understanding of the role of oxidative stress in signaling, and the realization that many of the observed effects may involve disruption and/or enhancement of normal endogenous redox signaling and induction of a potent immune-mediated response, through entrainment of multiple reactive oxygen species (ROS). CRITICAL ISSUES The molecular events by which pulmonary oxidative stress in response to inhalational exposure to air pollution triggers inflammation, major ROS (e.g., superoxide, hydroxyl radical, nitric oxide, and peroxynitrite) generated in air pollution exposure, types of oxidative tissue damage in target organs, contributions of nonimmune and immune cells in inflammation, and the role of protective proteins (e.g., surfactant, proteins, and antioxidants) are highly complex and may differ depending on models and concomitant disease states. FUTURE DIRECTIONS While the role of oxidative stress in the lung has been well demonstrated, the role of oxidative stress in mediating systemic effects especially in inflammation and injury processes needs further work. The role of antioxidant defenses with chronic exposure will also need further exploration. Antioxid. Redox Signal. 28, 797-818.
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Affiliation(s)
- Xiaoquan Rao
- 1 Department of Medicine, Case Cardiovascular Research Institute, Case Western Reserve University , Cleveland, Ohio
| | - Jixin Zhong
- 1 Department of Medicine, Case Cardiovascular Research Institute, Case Western Reserve University , Cleveland, Ohio
| | - Robert D Brook
- 2 Department of Medicine, Division of Cardiovascular Medicine, University of Michigan , Ann Arbor, Michigan
| | - Sanjay Rajagopalan
- 1 Department of Medicine, Case Cardiovascular Research Institute, Case Western Reserve University , Cleveland, Ohio
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Pacitto A, Stabile L, Viana M, Scungio M, Reche C, Querol X, Alastuey A, Rivas I, Álvarez-Pedrerol M, Sunyer J, van Drooge BL, Grimalt JO, Sozzi R, Vigo P, Buonanno G. Particle-related exposure, dose and lung cancer risk of primary school children in two European countries. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 616-617:720-729. [PMID: 29089125 DOI: 10.1016/j.scitotenv.2017.10.256] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/19/2017] [Accepted: 10/25/2017] [Indexed: 06/07/2023]
Abstract
Schools represent a critical microenvironment in terms of air quality due to the proximity to outdoor particle sources and the frequent lack of proper ventilation and filtering systems. Moreover, the population exposed in schools (i.e. children) represents a susceptible population due to their age. Air quality-based studies involving students' exposure at schools are still scarce and often limited to mass-based particle metrics and may thus underestimate the possible effect of sub-micron particles and particle toxicity. To this purpose, the present paper aims to evaluate the exposure to different airborne particle metrics (including both sub- and super-micron particles) and attached carcinogenic compounds. Measurements in terms of particle number, lung-deposited surface area, and PM fraction concentrations were measured inside and outside schools in Barcelona (Spain) and Cassino (Italy). Simultaneously, PM samples were collected and chemically analysed to obtain mass fractions of carcinogenic compounds. School time airborne particle doses received by students in classrooms were evaluated as well as their excess lung cancer risk due to a five-year primary school period. Median surface area dose received by students during school time in Barcelona and Cassino resulted equal to 110mm2 and 303mm2, respectively. The risk related to the five-year primary school period was estimated as about 2.9×10-5 and 1.4×10-4 for students of Barcelona and Cassino, respectively. The risk in Barcelona is slightly higher with respect to the maximum tolerable value (10-5, according to the U.S. Environmental Protection Agency), mainly due to toxic compounds on particles generated from anthropogenic emissions (mainly industry). On the other hand, the excess lung cancer risk in Cassino is cause of concern, being one order of magnitude higher than the above-mentioned threshold value due to the presence of biomass burning heating systems and winter thermal inversion that cause larger doses and great amount of toxic compounds on particles.
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Affiliation(s)
- A Pacitto
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino, FR, Italy
| | - L Stabile
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino, FR, Italy
| | - M Viana
- Institute of Environmental Assessment and Water Research (IDAEA), Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain
| | - M Scungio
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino, FR, Italy
| | - C Reche
- Institute of Environmental Assessment and Water Research (IDAEA), Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain
| | - X Querol
- Institute of Environmental Assessment and Water Research (IDAEA), Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain
| | - A Alastuey
- Institute of Environmental Assessment and Water Research (IDAEA), Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain
| | - I Rivas
- Institute of Environmental Assessment and Water Research (IDAEA), Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain
| | | | - J Sunyer
- ISGlobal - Barcelona Institute for Global Health, Barcelona, Spain
| | - B L van Drooge
- Institute of Environmental Assessment and Water Research (IDAEA), Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain
| | - J O Grimalt
- Institute of Environmental Assessment and Water Research (IDAEA), Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain
| | - R Sozzi
- ARPA Lazio, Via Garibaldi, 114, 02100 Rieti, Italy
| | - P Vigo
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino, FR, Italy
| | - G Buonanno
- Queensland University of Technology, Brisbane, Australia; Department of Engineering, University "Parthenope", Naples, Italy; Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino, FR, Italy.
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Burke KE. Mechanisms of aging and development-A new understanding of environmental damage to the skin and prevention with topical antioxidants. Mech Ageing Dev 2017; 172:123-130. [PMID: 29287765 DOI: 10.1016/j.mad.2017.12.003] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 12/21/2017] [Indexed: 12/26/2022]
Abstract
Recent research has given us new insights into the molecular biology of extrinsic aging of the skin. Not only does UV irradiation directly cause photoaging of the skin, but also environmental pollutants significantly damage exposed skin by several mechanisms. Exposure to the noxious gases of air pollution with simultaneous exposure to UVA can act synergistically to initiate skin cancer. Also ozone generated from pollutants reacting with UV induces oxidative stress of the skin's surface via formation of lipid peroxidation products, with cascading consequences to deeper layers. Furthermore, new studies have demonstrated that particulate matter (PM) pollutants can penetrate the skin transepidermally and through hair follicles to induce skin aging via the aryl hydrocarbon receptor (AHR), a recently discovered ligand-activated transcription factor that regulates and protects keratinocytes, melanocytes, and fibroblasts. With this understanding that extrinsic aging of the skin is not only due to photoaging, we realize the necessity of protection beyond sunscreen. Fortunately, correctly formulated topical antioxidants can prevent damage inflicted by both UV and environmental pollution.
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Gruzieva O, Merid SK, Gref A, Gajulapuri A, Lemonnier N, Ballereau S, Gigante B, Kere J, Auffray C, Melén E, Pershagen G. Exposure to Traffic-Related Air Pollution and Serum Inflammatory Cytokines in Children. ENVIRONMENTAL HEALTH PERSPECTIVES 2017; 125:067007. [PMID: 28669936 PMCID: PMC5714301 DOI: 10.1289/ehp460] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 10/20/2016] [Accepted: 11/07/2016] [Indexed: 05/12/2023]
Abstract
BACKGROUND Long-term exposure to ambient air pollution can lead to adverse health effects in children; however, underlying biological mechanisms are not fully understood. OBJECTIVES We evaluated the effect of air pollution exposure during different time periods on mRNA expression as well as circulating levels of inflammatory cytokines in children. METHODS We measured a panel of 10 inflammatory markers in peripheral blood samples from 670 8-y-old children in the Barn/Child, Allergy, Milieu, Stockholm, Epidemiology (BAMSE) birth cohort. Outdoor concentrations of nitrogen dioxide (NO2) and particulate matter (PM) with aerodynamic diameter <10 μm (PM10) from road traffic were estimated for residential, daycare, and school addresses using dispersion modeling. Time-weighted average exposures during infancy and at biosampling were linked to serum cytokine levels using linear regression analysis. Furthermore, gene expression data from 16-year-olds in BAMSE (n=238) were used to evaluate links between air pollution exposure and expression of genes coding for the studied inflammatory markers. RESULTS A 10 μg/m3 increase of NO2 exposure during infancy was associated with a 13.6% (95% confidence interval (CI): 0.8; 28.1%) increase in interleukin-6 (IL-6) levels, as well as with a 27.8% (95% CI: 4.6, 56.2%) increase in IL-10 levels, the latter limited to children with asthma. However, no clear associations were observed for current exposure. Results were similar using PM10, which showed a high correlation with NO2. The functional analysis identified several differentially expressed genes in response to air pollution exposure during infancy, including IL10, IL13, and TNF;. CONCLUSION Our results indicate alterations in systemic inflammatory markers in 8-y-old children in relation to early-life exposure to traffic-related air pollution. https://doi.org/10.1289/EHP460.
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Affiliation(s)
- Olena Gruzieva
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Simon Kebede Merid
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Anna Gref
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Ashwini Gajulapuri
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Nathanaël Lemonnier
- European Institute for Systems Biology and Medicine, CNRS-ENS-UCBL, Université de Lyon, Lyon, France
| | - Stéphane Ballereau
- European Institute for Systems Biology and Medicine, CNRS-ENS-UCBL, Université de Lyon, Lyon, France
| | - Bruna Gigante
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Juha Kere
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Charles Auffray
- European Institute for Systems Biology and Medicine, CNRS-ENS-UCBL, Université de Lyon, Lyon, France
| | - Erik Melén
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Paediatrics, Sachs’ Children’s Hospital, Stockholm, Sweden
- Centre for Occupational and Environmental Medicine, Stockholm County Council, Stockholm, Sweden
| | - Göran Pershagen
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
- Centre for Occupational and Environmental Medicine, Stockholm County Council, Stockholm, Sweden
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Miller MR, Raftis JB, Langrish JP, McLean SG, Samutrtai P, Connell SP, Wilson S, Vesey AT, Fokkens PHB, Boere AJF, Krystek P, Campbell CJ, Hadoke PWF, Donaldson K, Cassee FR, Newby DE, Duffin R, Mills NL. Inhaled Nanoparticles Accumulate at Sites of Vascular Disease. ACS NANO 2017; 11:4542-4552. [PMID: 28443337 PMCID: PMC5444047 DOI: 10.1021/acsnano.6b08551] [Citation(s) in RCA: 351] [Impact Index Per Article: 50.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 03/24/2017] [Indexed: 05/18/2023]
Abstract
The development of engineered nanomaterials is growing exponentially, despite concerns over their potential similarities to environmental nanoparticles that are associated with significant cardiorespiratory morbidity and mortality. The mechanisms through which inhalation of nanoparticles could trigger acute cardiovascular events are emerging, but a fundamental unanswered question remains: Do inhaled nanoparticles translocate from the lung in man and directly contribute to the pathogenesis of cardiovascular disease? In complementary clinical and experimental studies, we used gold nanoparticles to evaluate particle translocation, permitting detection by high-resolution inductively coupled mass spectrometry and Raman microscopy. Healthy volunteers were exposed to nanoparticles by acute inhalation, followed by repeated sampling of blood and urine. Gold was detected in the blood and urine within 15 min to 24 h after exposure, and was still present 3 months after exposure. Levels were greater following inhalation of 5 nm (primary diameter) particles compared to 30 nm particles. Studies in mice demonstrated the accumulation in the blood and liver following pulmonary exposure to a broader size range of gold nanoparticles (2-200 nm primary diameter), with translocation markedly greater for particles <10 nm diameter. Gold nanoparticles preferentially accumulated in inflammation-rich vascular lesions of fat-fed apolipoproteinE-deficient mice. Furthermore, following inhalation, gold particles could be detected in surgical specimens of carotid artery disease from patients at risk of stroke. Translocation of inhaled nanoparticles into the systemic circulation and accumulation at sites of vascular inflammation provides a direct mechanism that can explain the link between environmental nanoparticles and cardiovascular disease and has major implications for risk management in the use of engineered nanomaterials.
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Affiliation(s)
- Mark R. Miller
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
- E-mail:
| | - Jennifer B. Raftis
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Jeremy P. Langrish
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Steven G. McLean
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Pawitrabhorn Samutrtai
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Shea P. Connell
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Simon Wilson
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Alex T. Vesey
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Paul H. B. Fokkens
- National
Institute for Public Health and the Environment (RIVM), 3721 MA Bilthoven, The Netherlands
| | - A. John F. Boere
- National
Institute for Public Health and the Environment (RIVM), 3721 MA Bilthoven, The Netherlands
| | - Petra Krystek
- Department
of Environment and Health, VU University, 1081 HV Amsterdam, The Netherlands
| | - Colin J. Campbell
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Patrick W. F. Hadoke
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Ken Donaldson
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Flemming R. Cassee
- National
Institute for Public Health and the Environment (RIVM), 3721 MA Bilthoven, The Netherlands
- Institute
for Risk Assessment Sciences, Utrecht University, 3512 JE Utrecht, The Netherlands
| | - David E. Newby
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Rodger Duffin
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Nicholas L. Mills
- BHF Centre for Cardiovascular Science, MRC Centre for Inflammation
Research, and EaStCHEM School
of Chemistry, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
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Photo-pollution stress in skin: Traces of pollutants (PAH and particulate matter) impair redox homeostasis in keratinocytes exposed to UVA1. J Dermatol Sci 2017; 86:162-169. [PMID: 28153538 DOI: 10.1016/j.jdermsci.2017.01.007] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 12/13/2016] [Accepted: 01/11/2017] [Indexed: 01/06/2023]
Abstract
BACKGROUND It is likely that skin is exposed to low concentrations of pollutants such as Polycyclic Aromatic Hydrocarbons (PAH) either through topical penetration by ultrafine particles or by systemic distribution. No precise estimation of pollutants in living skin is available, but literature has reported contamination of blood by PAH at concentrations in the nanomolar range. Some pollutants (PAH for example) are photo-reactive and phototoxic: sunlight and pollution might thus synergistically compromise skin health. OBJECTIVE Here, the biological effects of particulate matter, PM extract and various PAH were compared in normal human epidermal keratinocytes (NHEK) and reconstructed skin model exposed to either daily UV (d-UV 300-400nm) or UVA1 (350-400nm). Impact of pollutants (PM, PAH or PM extract) combined to UV was studied on NHEK by measuring toxicity, redox homeostasis and GSH metabolism in NHEK. METHODS NHEK were exposed to UV from solar simulator (either d-UV or UVA1) combined with pollutants. Viability, clonogenic efficiency, redox homeostasis and GSH metabolism were assessed. RESULTS Pollutants (PAH, PM or PM extract) ±UVA1 irradiation was associated with a significant phototoxic effect that was equal to or greater than that produced by d-UV. This result is interesting considering that UVA1 represents around 80% of daily UV and reaches the dermal-epidermal junction with ease. Moreover, among PAH studied, benzo[a]pyrene and indeno[1,2,3-cd]pyrene were phototoxic at very low concentrations (nanomolar range) on cultured cells or in reconstructed epidermis and also impaired keratinocyte clonogenic potential at sub-toxic doses. ROS generation within cells and in the inner mitochondrial compartment, mitochondrial membrane depolarization and/or reduced ATP production were also noted. Meanwhile, intracellular glutathione concentrations transiently decreased several hours post-treatment and reduction of its synthesis by buthionine sulfoximine potentiated PAH phototoxicity. Consequently, expression of GSH neo-synthesis genes such as SLC7A11 or GCLc was upregulated several hours post-treatment. CONCLUSION These results obtained using PAH concentrations in the range of those reported in blood of pollution-exposed people suggest that exposure to such a photo-pollution stress, particularly if chronic, may impair cutaneous homeostasis and aggravate sunlight-induced skin damage.
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Ajmani GS, Suh HH, Pinto JM. Effects of Ambient Air Pollution Exposure on Olfaction: A Review. ENVIRONMENTAL HEALTH PERSPECTIVES 2016; 124:1683-1693. [PMID: 27285588 PMCID: PMC5089874 DOI: 10.1289/ehp136] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 02/25/2016] [Accepted: 05/20/2016] [Indexed: 05/03/2023]
Abstract
BACKGROUND Olfactory dysfunction affects millions of people worldwide. This sensory impairment is associated with neurodegenerative disease and significantly decreased quality of life. Exposure to airborne pollutants has been implicated in olfactory decline, likely due to the anatomic susceptibility of the olfactory nerve to the environment. Historically, studies have focused on occupational exposures, but more recent studies have considered effects from exposure to ambient air pollutants. OBJECTIVES To examine all relevant human data evaluating a link between ambient pollution exposure and olfaction and to review supporting animal data in order to examine potential mechanisms for pollution-associated olfactory loss. METHODS We identified and reviewed relevant articles from 1950 to 2015 using PubMed and Web of Science and focusing on human epidemiologic and pathophysiologic studies. Animal studies were included only to support pertinent data on humans. We reviewed findings from these studies evaluating a relationship between environmental pollutant exposure and olfactory function. RESULTS We identified and reviewed 17 articles, with 1 additional article added from a bibliography search, for a total of 18 human studies. There is evidence in human epidemiologic and pathologic studies that increased exposure to ambient air pollutants is associated with olfactory dysfunction. However, most studies have used proxies for pollution exposure in small samples of convenience. Human pathologic studies, with supporting animal work, have also shown that air pollution can contact the olfactory epithelium, translocate to the olfactory bulb, and migrate to the olfactory cortex. Pollutants can deposit at each location, causing direct damage and disruption of tissue morphology or inducing local inflammation and cellular stress responses. CONCLUSIONS Ambient air pollution may impact human olfactory function. Additional studies are needed to examine air pollution-related olfactory impacts on the general population using measured pollution exposures and to link pollution exposure with olfactory dysfunction and related pathology. Citation: Ajmani GS, Suh HH, Pinto JM. 2016. Effects of ambient air pollution exposure on olfaction: a review. Environ Health Perspect 124:1683-1693; http://dx.doi.org/10.1289/EHP136.
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Affiliation(s)
- Gaurav S. Ajmani
- Pritzker School of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Helen H. Suh
- Department of Health Sciences, Northeastern University, Boston, Massachusetts, USA
| | - Jayant M. Pinto
- Section of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of Chicago, Chicago, Illinois, USA
- Address correspondence to J.M. Pinto, Section of Otolaryngology-Head and Neck Surgery, Department of Surgery, The University of Chicago Medicine and Biological Sciences, MC103, 5841 South Maryland Ave., Chicago, IL 60647 USA. Telephone: (773) 702-6727. E-mail:
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Vieira JL, Guimaraes GV, de Andre PA, Cruz FD, Saldiva PHN, Bocchi EA. Respiratory Filter Reduces the Cardiovascular Effects Associated With Diesel Exhaust Exposure: A Randomized, Prospective, Double-Blind, Controlled Study of Heart Failure: The FILTER-HF Trial. JACC-HEART FAILURE 2016; 4:55-64. [PMID: 26738952 DOI: 10.1016/j.jchf.2015.07.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 07/15/2015] [Accepted: 07/17/2015] [Indexed: 01/23/2023]
Abstract
OBJECTIVES The goal of this study was to test the effects of a respiratory filter intervention (filter) during controlled pollution exposure. BACKGROUND Air pollution is considered a risk factor for heart failure (HF) decompensation and mortality. METHODS This study was a double-blind, randomized to order, controlled, 3-way crossover, single-center clinical trial. It enrolled 26 patients with HF and 15 control volunteers. Participants were exposed in 3 separate sessions to clean air, unfiltered diesel exhaust exposure (DE), or filtered DE. Endpoints were endothelial function assessed by using the reactive hyperemia index (RHi), arterial stiffness, serum biomarkers, 6-min walking distance, and heart rate variability. RESULTS In patients with HF, DE was associated with a worsening in RHi from 2.17 (interquartile range [IQR]: 1.8 to 2.5) to 1.72 (IQR: 1.5 to 2.2; p = 0.002) and an increase in B-type natriuretic peptide (BNP) from 47.0 pg/ml (IQR: 17.3 to 118.0 pg/ml) to 66.5 pg/ml (IQR: 26.5 to 155.5 pg/ml; p = 0.004). Filtration reduced the particulate concentration (325 ± 31 μg/m(3) vs. 25 ± 6 μg/m(3); p < 0.001); in the group with HF, filter was associated with an improvement in RHi from 1.72 (IQR: 1.5 to 2.2) to 2.06 (IQR: 1.5 to 2.6; p = 0.019) and a decrease in BNP from 66.5 pg/ml (IQR: 26.5 to 155.5 pg/ml) to 44.0 pg/ml (IQR: 20.0 to 110.0 pg/ml; p = 0.015) compared with DE. In both groups, DE decreased the 6-min walking distance and arterial stiffness, although filter did not change these responses. DE had no effect on heart rate variability or exercise testing. CONCLUSIONS To our knowledge, this trial is the first to show that a filter can reduce both endothelial dysfunction and BNP increases in patients with HF during DE. Given these potential benefits, the widespread use of filters in patients with HF exposed to traffic-derived air pollution may have beneficial public health effects and reduce the burden of HF. (Effects of Air Pollution Exposure Reduction by Filter Mask on Heart Failure; NCT01960920).
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Affiliation(s)
- Jefferson L Vieira
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil.
| | | | - Paulo A de Andre
- Air Pollution Laboratory, University of São Paulo Medical School, São Paulo, Brazil
| | - Fátima D Cruz
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | | | - Edimar A Bocchi
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
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Rao X, Patel P, Puett R, Rajagopalan S. Air pollution as a risk factor for type 2 diabetes. Toxicol Sci 2015; 143:231-41. [PMID: 25628401 DOI: 10.1093/toxsci/kfu250] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Recent studies in both humans and animals suggest that air pollution is an important risk factor for type 2 diabetes mellitus (T2DM). However, the mechanism by which air pollution mediates propensity to diabetes is not fully understood. While a number of epidemiologic studies have shown a positive association between ambient air pollution exposure and risk for T2DM, some studies have not found such a relationship. Experimental studies in susceptible disease models do support this association and suggest the involvement of tissues involved in the pathogenesis of T2DM such as the immune system, adipose, liver, and central nervous system. This review summarizes the epidemiologic and experimental evidence between ambient outdoor air pollution and T2DM.
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Affiliation(s)
- Xiaoquan Rao
- *Division of Cardiovascular Medicine, University of Maryland, Baltimore and Maryland Institute for Applied Environmental Health, Department of Epidemiology and Biostatistics, School of Public Health, University of Maryland, College Park
| | - Priti Patel
- *Division of Cardiovascular Medicine, University of Maryland, Baltimore and Maryland Institute for Applied Environmental Health, Department of Epidemiology and Biostatistics, School of Public Health, University of Maryland, College Park
| | - Robin Puett
- *Division of Cardiovascular Medicine, University of Maryland, Baltimore and Maryland Institute for Applied Environmental Health, Department of Epidemiology and Biostatistics, School of Public Health, University of Maryland, College Park
| | - Sanjay Rajagopalan
- *Division of Cardiovascular Medicine, University of Maryland, Baltimore and Maryland Institute for Applied Environmental Health, Department of Epidemiology and Biostatistics, School of Public Health, University of Maryland, College Park
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Mallampati SR, Mitoma Y, Simion C, Lee BH. Immobilization and volume reduction of heavy metals in municipal solid waste fly ash using nano-size calcium and iron-dispersed reagent. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (1995) 2015; 65:1247-1255. [PMID: 26230452 DOI: 10.1080/10962247.2015.1077175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
UNLABELLED This study was conducted to examine the synthesis and application of novel nano-size calcium/iron-based composite material as an immobilizing and separation treatment of the heavy metals in fly ash from municipal solid waste incineration. After grinding with nano-Fe/Ca/CaO and with nano-Fe/Ca/CaO/[PO₄], approximately 30 wt% and 25 wt% of magnetic fraction fly ash were separated. The highest amount of entrapped heavy metals was found in the lowest weight of the magnetically separated fly ash fraction (i.e., 91% in 25% of treated fly ash). Heavy metals in the magnetic or nonmagnetic fly ash fractions were about 98% and 100% immobilized, respectively. Additionally, scanning electron microscopy combined with energy-dispersive X-ray spectrometry (SEM-EDS) observations indicate that the main fraction of enclosed/bound materials on treated fly ash includes Ca/PO₄-associated crystalline complexes. After nano-Fe/Ca/CaO/[PO₄] treatment, the heavy metal concentrations in the fly ash leachate were much lower than the Japan standard regulatory limit for hazardous waste landfills. These results appear to be extremely promising. The addition of a nano-Fe/Ca/CaO/PO₄mixture with simple grinding technique is potentially applicable for the remediation and volume reduction of fly ash contaminated by heavy metals. IMPLICATIONS After grinding with nano-Fe/Ca/CaO and nano-Fe/Ca/CaO/[PO₄], approximately 30 wt% and 25 wt% of magnetic fraction fly ash were separated. The highest amount of entrapped heavy metals was found in the lowest weight of the magnetically separated fly ash fraction (i.e., 91% in 25% of treated fly ash), whereas heavy metals either in the magnetic or nonmagnetic fly ash fractions were about 98% and 100% immobilized. These results appear to be very promising, and the addition of nano-Fe/Ca/CaO/PO₄mixture with simple grinding technique may be considered potentially applicable for the remediation and volume reduction of contaminated fly ash by heavy metals.
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Affiliation(s)
| | - Yoshiharu Mitoma
- b Department of Environmental Sciences , Prefectural University of Hiroshima , Hiroshima , Japan
| | - Cristian Simion
- c Politehnica University of Bucharest , Department of Organic Chemistry , Bucharest , Romania
| | - Byoung Ho Lee
- a Department of Civil and Environmental Engineering , University of Ulsan , Ulsan , Republic of Korea
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50
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Fagundes LS, Fleck ADS, Zanchi AC, Saldiva PHN, Rhoden CR. Direct contact with particulate matter increases oxidative stress in different brain structures. Inhal Toxicol 2015; 27:462-7. [PMID: 26327340 DOI: 10.3109/08958378.2015.1060278] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Several experimental and epidemiological studies have demonstrated the neurological adverse effects caused by exposure to air pollution, specifically in relation to pollutant particulate matter (PM). The objective of this study was to investigate the direct effect of PM in increased concentrations in different brain regions, as well as the mechanisms involving its neurotoxicity, by evaluating oxidative stress parameters in vitro. METHODS Olfactory bulb, cerebral cortex, striatum, hippocampus and cerebellum of rats were homogenized and incubated with PM < 2.5 μm of diameter (PM2.5) at concentrations of 3, 5 and 10 µg/mg of tissue. The oxidative damage caused by lipid peroxidation of these structures was determined by testing the thiobarbituric acid reactive species (TBA-RS). In addition, we measured the activity of antioxidant enzyme catalase (CAT) and superoxide dismutase (SOD). RESULTS All PM concentrations were able to damage the cerebellum and hippocampus, strongly enhancing the lipid peroxidation in both structures. PM incubation also decreased the CAT activity of the hippocampus, cerebellum, striatum and olfactory bulb, though it did not generate higher levels of lipid peroxidation in either of the last two structures. PM incubation did not alter any measurement of the cerebral cortex. CONCLUSION The cerebellum and hippocampus seem to be more susceptible than other brain structures to in vitro direct PM exposure assay and the oxidative stress pathway catalyzes the neurotoxic effect of PM exposure, as evidenced by high consumption of CAT and high levels of TBA-RS. Thus, PM direct exposure seems to activate toxic neurological effects.
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Affiliation(s)
- Lucas Sagrillo Fagundes
- a Laboratório de Estresse Oxidativo e Poluição Atmosférica - Universidade Federal de Ciências da Saúde de Porto Alegre - UFCSPA , Porto Alegre , RS , Brazil and
| | - Alan da Silveira Fleck
- a Laboratório de Estresse Oxidativo e Poluição Atmosférica - Universidade Federal de Ciências da Saúde de Porto Alegre - UFCSPA , Porto Alegre , RS , Brazil and
| | - Ana Claudia Zanchi
- a Laboratório de Estresse Oxidativo e Poluição Atmosférica - Universidade Federal de Ciências da Saúde de Porto Alegre - UFCSPA , Porto Alegre , RS , Brazil and
| | - Paulo Hilário Nascimento Saldiva
- b Laboratório de Poluição Atmosférica Experimental, Faculdade de Medicina, Universidade de São Paulo-USP , São Paulo , SP , Brazil
| | - Cláudia Ramos Rhoden
- a Laboratório de Estresse Oxidativo e Poluição Atmosférica - Universidade Federal de Ciências da Saúde de Porto Alegre - UFCSPA , Porto Alegre , RS , Brazil and
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