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Huang SH, Kuo YM, Lin CW, Chen TJ, Liu J, Gui H, Chen CC. Development of respirable virtual-cyclone samplers. JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE 2019; 16:785-792. [PMID: 31647753 DOI: 10.1080/15459624.2019.1670834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Health-based aerosol sampling should reflect how particles penetrate and deposit in various regions of the human respiratory system. Therefore, size-selective sampling should be adopted when monitoring aerosol concentration in the atmosphere. However, cyclone samplers, the most commonly used respirable sampler type in the workplace, show specific particle size-dependent bias toward the international respirable convention. Additionally, cyclone samplers are vulnerable to the dust loading effect resulting in an underestimation of respirable particulate matter. In the previous study, a virtual cyclone has been employed to overcome the dust loading effect, but still had the disadvantage of high aerosol penetration of large particle sizes. Therefore, in this work, the effects of key dimensions of virtual cyclones including chamber width (or inlet width), chamber size and inlet height on the separation performance were further studied and the configurations of virtual cyclones were modified to best fit the ISO/CEN/ACGIH respirable convention. Experimental results demonstrated that a better match with the ISO/CEN/ACGIH respirable convention curve can be achieved by increasing the chamber width to over 20 mm. Moreover, the new virtual cyclones can operate at a flow rate up to 21.5 L/min to collect more respirable particulate matter for the increasingly stringent respirable dust standards. The new virtual cyclones demonstrate accurate and constant measurement of the respirable dust for exposure assessment.
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Affiliation(s)
- Sheng-Hsiu Huang
- Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Yu-Mei Kuo
- Department of Occupational Safety and Health, Chung Hwa University of Medical Technology, Tainan, Taiwan
| | - Chih-Wei Lin
- Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Ting-Ju Chen
- Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Jianguo Liu
- Key Laboratory of Environmental Optics and Technology, Anhui, Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, China
| | - Huaqiao Gui
- Key Laboratory of Environmental Optics and Technology, Anhui, Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, China
| | - Chih-Chieh Chen
- Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan
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da Silva TD, Barnabé V, Ricci-Vitor AL, Papapostolou V, Tagle M, Henriquez A, Lawrence J, Ferguson S, Wolfson JM, Koutrakis P, Oyola P, Ferreira C, de Abreu LC, Monteiro CBDM, Godleski JJ. Secondary particles formed from the exhaust of vehicles using ethanol-gasoline blends increase the production of pulmonary and cardiac reactive oxygen species and induce pulmonary inflammation. ENVIRONMENTAL RESEARCH 2019; 177:108661. [PMID: 31442789 DOI: 10.1016/j.envres.2019.108661] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 07/08/2019] [Accepted: 08/12/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Ethanol vehicles release exhaust gases that contribute to the formation of secondary organic aerosols (SOA). OBJECTIVE To determine in vivo toxicity resulting from exposure to SOA derived from vehicles using different ethanol-gasoline blends (E0, E10, E22, E85W, E85S, E100). METHODS Exhaust emissions from vehicles using ethanol blends were delivered to a photochemical chamber and reacted to produce SOA. The aerosol samples were collected on filters, extracted, and dispersed in an aqueous solutions and intratracheally instilled into Sprague Dawley rats in doses of 700 μg/0.2 ml. After 45 min and 4 h pulmonary and cardiac chemiluminescence (CL) was measured to estimate the amount of reactive oxygen species (ROS) produced in the lungs and heart. Inflammation was measured by differential cell count in bronchoalveolar lavages (BAL). RESULTS Statistically and biologically significant differences in response to secondary particles from the different fuel formulations were detected. Compared to the control group, animals exposed to SOA from gasoline (E0) showed a significantly higher average CL in the lungs at 45 min. The highest CL averages in the heart were observed in the groups exposed to SOA from E10 and pure ethanol (E100) at 45 min. BAL of animals exposed to SOA from E0 and E85S had a significant increased number of macrophages at 45 min. BAL neutrophil count was increased in the groups exposed to E85S (45 min) and E0 (4 h). Animals exposed to E0 and E85W had increased BAL lymphocyte count compared to the control and the other exposed groups. DISCUSSION Our results suggest that SOA generated by gasoline (E0), followed by ethanol blends E85S and E85W, substantially induce oxidative stress measured by ROS generation and pulmonary inflammation measured by the recruitment of white blood cells in BAL.
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Affiliation(s)
- Talita Dias da Silva
- Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA, USA; Paulista School of Medicine, Federal University of São Paulo, São Paulo, SP, Brazil.
| | - Viviani Barnabé
- Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA, USA; Medical School, University City of São Paulo, São Paulo, SP, Brazil
| | - Ana Laura Ricci-Vitor
- Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA, USA; Paulista School of Medicine, Federal University of São Paulo, São Paulo, SP, Brazil
| | | | - Matias Tagle
- Mario Molina Center for Strategic Studies in Energy and Environment, Santiago, Chile
| | - Andres Henriquez
- Oak Ridge Institute for Science and Education, Research Triangle Park, NC, United States
| | - Joy Lawrence
- Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA, USA
| | - Stephen Ferguson
- Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA, USA
| | - J Mikhail Wolfson
- Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA, USA
| | - Petros Koutrakis
- Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA, USA
| | - Pedro Oyola
- Mario Molina Center for Strategic Studies in Energy and Environment, Santiago, Chile
| | - Celso Ferreira
- Paulista School of Medicine, Federal University of São Paulo, São Paulo, SP, Brazil
| | | | | | - John J Godleski
- Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA, USA
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Oxidative Potential Versus Biological Effects: A Review on the Relevance of Cell-Free/Abiotic Assays as Predictors of Toxicity from Airborne Particulate Matter. Int J Mol Sci 2019; 20:ijms20194772. [PMID: 31561428 PMCID: PMC6801578 DOI: 10.3390/ijms20194772] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 09/20/2019] [Accepted: 09/24/2019] [Indexed: 12/20/2022] Open
Abstract
Background and Objectives: The oxidative potential (OP) of particulate matter (PM) in cell-free/abiotic systems have been suggested as a possible measure of their biological reactivity and a relevant exposure metric for ambient air PM in epidemiological studies. The present review examined whether the OP of particles correlate with their biological effects, to determine the relevance of these cell-free assays as predictors of particle toxicity. Methods: PubMed, Google Scholar and Web of Science databases were searched to identify relevant studies published up to May 2019. The main inclusion criteria used for the selection of studies were that they should contain (1) multiple PM types or samples, (2) assessment of oxidative potential in cell-free systems and (3) assessment of biological effects in cells, animals or humans. Results: In total, 50 independent studies were identified assessing both OP and biological effects of ambient air PM or combustion particles such as diesel exhaust and wood smoke particles: 32 in vitro or in vivo studies exploring effects in cells or animals, and 18 clinical or epidemiological studies exploring effects in humans. Of these, 29 studies assessed the association between OP and biological effects by statistical analysis: 10 studies reported that at least one OP measure was statistically significantly associated with all endpoints examined, 12 studies reported that at least one OP measure was significantly associated with at least one effect outcome, while seven studies reported no significant correlation/association between any OP measures and any biological effects. The overall assessment revealed considerable variability in reported association between individual OP assays and specific outcomes, but evidence of positive association between intracellular ROS, oxidative damage and antioxidant response in vitro, and between OP assessed by the dithiothreitol (DDT) assay and asthma/wheeze in humans. There was little support for consistent association between OP and any other outcome assessed, either due to repeated lack of statistical association, variability in reported findings or limited numbers of available studies. Conclusions: Current assays for OP in cell-free/abiotic systems appear to have limited value in predicting PM toxicity. Clarifying the underlying causes may be important for further advancement in the field.
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Abstract
OBJECTIVE Exposure to airborne particulate matter (PM) is estimated to cause millions of premature deaths annually. This work conveys known routes of exposure to PM and resultant health effects. METHODS A review of available literature. RESULTS Estimates for daily PM exposure are provided. Known mechanisms by which insoluble particles are transported and removed from the body are discussed. Biological effects of PM, including immune response, cytotoxicity, and mutagenicity, are reported. Epidemiological studies that outline the systemic health effects of PM are presented. CONCLUSION While the integrated, per capita, exposure of PM for a large fraction of the first-world may be less than 1 mg per day, links between several syndromes, including attention deficit hyperactivity disorder (ADHD), autism, loss of cognitive function, anxiety, asthma, chronic obstructive pulmonary disease (COPD), hypertension, stroke, and PM exposure have been suggested. This article reviews and summarizes such links reported in the literature.
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Soppa VJ, Shinnawi S, Hennig F, Sasse B, Hellack B, Kaminski H, Quass U, Schins RP, Kuhlbusch TA, Hoffmann B. Effects of short-term exposure to fine and ultrafine particles from indoor sources on arterial stiffness – A randomized sham-controlled exposure study. Int J Hyg Environ Health 2019; 222:1115-1132. [DOI: 10.1016/j.ijheh.2019.08.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 07/13/2019] [Accepted: 08/06/2019] [Indexed: 01/19/2023]
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Hwang J, Golla V, Metwali N, Thorne PS. Inhalable and Respirable Particulate and Endotoxin Exposures in Kentucky Equine Farms. J Agromedicine 2019; 25:179-189. [PMID: 31430228 DOI: 10.1080/1059924x.2019.1656128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Adverse respiratory health effects in the agricultural industry have been linked to particulate endotoxin exposure. However, whether the endotoxin concentration is significantly correlated to the size of the particle remains an open question. To date, limited research has been conducted to assess particulate endotoxin exposures in the agricultural industry in general or the equine industry in particular. A task-based exposure assessment was conducted to characterize the endotoxin levels of inhalable and respirable particles on four Kentucky farms during the summer season. We conducted personal sampling of respirable and inhalable particles (n = 75) across all four farms and particulate endotoxin (n = 58) on two of them. Simultaneously, we collected real-time area samples across all four farms by task - horse care, filing hooves, cleaning stalls, cleaning barns, cleaning dry lots, and cleaning trucks. The endotoxin concentration of inhalable particles (geometric mean: 50.2-1,024 EU/m3) was ~50 times higher than that of respirable particles (geometric mean: 1.72-19.0 EU/m3). Horse care generated the lowest endotoxin concentrations for both particle sizes, while cleaning tasks tended to produce higher concentrations. There was no significant correlation between the endotoxin and particle concentrations for each size fraction based on tasks by farm (R2 = 0.069 for inhalable; 0.214 for respirable). The equine workers in this study were exposed to higher endotoxin concentrations than workers in other industries, such as the swine industry. Providing exposure control guidelines and recommendations to the equine industry is necessary to reduce long-term endotoxin exposure and to prevent adverse respiratory symptoms.
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Affiliation(s)
- Jooyeon Hwang
- Department of Occupational and Environmental Health, Hudson College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Vijay Golla
- Department of Public Health, College of Health and Human Services, Western Kentucky University, Bowling Green, KY, USA
| | - Nervana Metwali
- Department of Occupational and Environmental Health, College of Public Health, University of Iowa, Iowa City, IA, USA
| | - Peter S Thorne
- Department of Occupational and Environmental Health, College of Public Health, University of Iowa, Iowa City, IA, USA
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Doumandji Z, Safar R, Lovera-Leroux M, Nahle S, Cassidy H, Matallanas D, Rihn B, Ferrari L, Joubert O. Protein and lipid homeostasis altered in rat macrophages after exposure to metallic oxide nanoparticles. Cell Biol Toxicol 2019; 36:65-82. [PMID: 31352547 PMCID: PMC7051947 DOI: 10.1007/s10565-019-09484-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 06/24/2019] [Indexed: 12/20/2022]
Abstract
Metal oxide nanoparticles (NPs), such as ZnO, ZnFe2O4, and Fe2O3, are widely used in industry. However, little is known about the cellular pathways involved in their potential toxicity. Here, we particularly investigated the key molecular pathways that are switched on after exposure to sub-toxic doses of ZnO, ZnFe2O4, and Fe2O3 in the in vitro rat alveolar macrophages (NR8383). As in our model, the calculated IC50 were respectively 16, 68, and more than 200 μg/mL for ZnO, ZnFe2O4, and Fe2O3; global gene and protein expression profiles were only analyzed after exposure to ZnO and ZnFe2O4 NPs. Using a rat genome microarray technology, we found that 985 and 1209 genes were significantly differentially expressed in NR8383 upon 4 h exposure to ¼ IC50 of ZnO and ZnFe2O4 NPs, respectively. It is noteworthy that metallothioneins were overexpressed genes following exposure to both NPs. Moreover, Ingenuity Pathway Analysis revealed that the top canonical pathway disturbed in NR8383 exposed to ZnO and ZnFe2O4 NPs was eIF2 signaling involved in protein homeostasis. Quantitative mass spectrometry approach performed from both NR8383 cell extracts and culture supernatant indicated that 348 and 795 proteins were differentially expressed upon 24 h exposure to ¼ IC50 of ZnO and ZnFe2O4 NPs, respectively. Bioinformatics analysis revealed that the top canonical pathways disturbed in NR8383 were involved in protein homeostasis and cholesterol biosynthesis for both exposure conditions. While VEGF signaling was specific to ZnO exposure, iron homeostasis signaling pathway was specific to ZnFe2O4 NPs. Overall, the study provides resource of transcriptional and proteomic markers of response to ZnO and ZnFe2O4 NP-induced toxicity through combined transcriptomics, proteomics, and bioinformatics approaches.
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Affiliation(s)
- Zahra Doumandji
- Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, 2 allée André Guinier, BP 50840, 54011, Nancy, France.
| | - Ramia Safar
- Faculté de Médecine, INSERM UMR_S NGERE 954, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Mélanie Lovera-Leroux
- Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, 2 allée André Guinier, BP 50840, 54011, Nancy, France
| | - Sara Nahle
- Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, 2 allée André Guinier, BP 50840, 54011, Nancy, France
| | - Hilary Cassidy
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin, Ireland
| | - David Matallanas
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin, Ireland
| | - Bertrand Rihn
- Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, 2 allée André Guinier, BP 50840, 54011, Nancy, France
| | - Luc Ferrari
- Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, 2 allée André Guinier, BP 50840, 54011, Nancy, France
| | - Olivier Joubert
- Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, 2 allée André Guinier, BP 50840, 54011, Nancy, France
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Abstract
Inflammation is a common and essential event in the pathogenesis of diverse diseases. Decades of research has converged on an understanding that all combustion-derived particulate matter (PM) is inflammatory to some extent in the lungs and also systemically, substantially explaining a significant portion of the massive cardiopulmonary disease burden associated with these exposures. In general, this means that efforts to do the following can all be beneficial: reduce particulates at the source, decrease the inflammatory potential of PM output, and, where PM inhalation is unavoidable, administer anti-inflammatory treatment. A range of research, including basic illumination of inflammatory pathways, assessment of disease burden in large cohorts, tailored treatment trials, and epidemiologic, animal, and in vitro studies, is highlighted in this review. However, meaningful translation of this research to decrease the burden of disease and deliver a clear and cohesive message to guide daily clinical practice remains rudimentary. Ongoing efforts to better understand substantial differences in the concentration and type of PM to which the global community is exposed and then distill how that influences inflammation promises to have real-world benefit. This review addresses this complex topic in 3 sections, including ambient PM (typically associated with ground-level transportation), wildfire-induced PM, and PM from indoor biomass burning. Recognizing the overlap between these domains, we also describe differences and suggest future directions to better inform clinical practice and public health.
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Affiliation(s)
- Weidong Wu
- Department of Occupational and Environmental Health, School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Yuefei Jin
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Chris Carlsten
- Air Pollution Exposure Laboratory, Department of Medicine and School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada.
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Yadav S, Kumbhar N, Jan R, Roy R, Satsangi PG. Genotoxic effects of PM 10 and PM 2.5 bound metals: metal bioaccessibility, free radical generation, and role of iron. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2019; 41:1163-1186. [PMID: 30302579 DOI: 10.1007/s10653-018-0199-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 09/29/2018] [Indexed: 06/08/2023]
Abstract
The present study was undertaken to examine the possible genotoxicity of ambient particulate matter (PM10 and PM2.5) in Pune city. In both size fractions of PM, Fe was found to be the dominant metal by concentration, contributing 22% and 30% to the total mass of metals in PM10 and PM2.5, respectively. The speciation of soluble Fe in PM10 and PM2.5 was investigated. The average fraction of Fe3+ and Fe2+ concentrations in PM2.5 was 80.6% and 19.3%, respectively, while in PM2.5 this fraction was 71.1% and 29.9%, respectively. The dominance of Fe(III) state in both PM fractions facilitates the generation of hydroxyl radicals (·OH), which can damage deoxyribose nucleic acid (DNA), as was evident from the gel electrophoresis study. The DNA damage by ·OH was supported through the in silico density functional theory (DFT) method. DFT results showed that C8 site of guanine (G)/adenine (A) and C6 site of thymine (T)/cytosine (C) would be energetically more favorable for the attack of hydroxyl radicals, when compared with the C4 and C5 sites. The non-standard Watson-Crick base pairing models of oxidative products of G, A, T and C yield lower-energy conformations than canonical dA:dT and dG:dC base pairing. This study may pave the way to understand the structural consequences of base-mediated oxidative lesions in DNA and its role in human diseases.
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Affiliation(s)
- Suman Yadav
- Department of Chemistry, Savitribai Phule Pune University (Formerly Pune University), Pune, 411007, India
- IDP in Climate Studies, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Navanath Kumbhar
- Department of Chemistry, Savitribai Phule Pune University (Formerly Pune University), Pune, 411007, India
| | - Rohi Jan
- Department of Chemistry, Savitribai Phule Pune University (Formerly Pune University), Pune, 411007, India
| | - Ritwika Roy
- Department of Chemistry, Savitribai Phule Pune University (Formerly Pune University), Pune, 411007, India
| | - P Gursumeeran Satsangi
- Department of Chemistry, Savitribai Phule Pune University (Formerly Pune University), Pune, 411007, India.
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Zhang Z, Chai P, Wang J, Ye Z, Shen P, Lu H, Jin M, Gu M, Li D, Lin H, Chen K. Association of particulate matter air pollution and hospital visits for respiratory diseases: a time-series study from China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:12280-12287. [PMID: 30840253 DOI: 10.1007/s11356-019-04397-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 01/25/2019] [Indexed: 05/13/2023]
Abstract
Fine particulate matter (PM2.5) is a mixture of multiple components, which is associated with several chronic diseases, including respiratory and cardiovascular diseases. We evaluated the association between daily PM2.5 and PM2.5-10 exposure and hospital visits for respiratory diseases. Hospital visits for respiratory diseases were collected from Yinzhou Health Information System database. We used generalized additive models to examine the excess relative risk (ERR) and 95% confidence interval for hospital visits for respiratory diseases associated with each 10-μg/m3 increase in PM2.5 and PM2.5-10 concentration. Non-linear exposure-response relationship between PM exposure and hospital visits for respiratory diseases was evaluated by a smooth spline. The ERRs for hospital visits for respiratory diseases associated with a 10-μg/m3 increase in the 6-day cumulative average concentration of PM2.5 and PM2.5-10 were 5.40 (95% CI 2.32, 8.57) and 6.37% (95% CI 1.84, 11.10), respectively. The findings remained stable when we adjusted other gaseous air pollution. PM2.5 and PM2.5-10 were associated with the increased visits for the acute upper respiratory infection, pneumonia, asthma, and COPD. In this time-series study, we found a positive association between daily particulate matter exposure and hospital visits for respiratory diseases.
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Affiliation(s)
- Zhenyu Zhang
- Welch Center for Prevention, Epidemiology and Clinical Research Department of Epidemiology, Bloomberg School of Public Health Johns Hopkins University, Baltimore, Maryland, 21205, USA
| | - Pengfei Chai
- Center for Disease Control and Prevention of Yinzhou District, Ningbo, 215100, Zhejiang, China
| | - Jianbing Wang
- Welch Center for Prevention, Epidemiology and Clinical Research Department of Epidemiology, Bloomberg School of Public Health Johns Hopkins University, Baltimore, Maryland, 21205, USA
- Department of Epidemiology and Health Statistics, Zhejiang University School of Public Health, Hangzhou, 310058, Zhejiang, China
| | - Zhenhua Ye
- Welch Center for Prevention, Epidemiology and Clinical Research Department of Epidemiology, Bloomberg School of Public Health Johns Hopkins University, Baltimore, Maryland, 21205, USA
- Department of Epidemiology and Health Statistics, Zhejiang University School of Public Health, Hangzhou, 310058, Zhejiang, China
| | - Peng Shen
- Center for Disease Control and Prevention of Yinzhou District, Ningbo, 215100, Zhejiang, China
| | - Huaichu Lu
- Center for Disease Control and Prevention of Yinzhou District, Ningbo, 215100, Zhejiang, China
| | - Mingjuan Jin
- Welch Center for Prevention, Epidemiology and Clinical Research Department of Epidemiology, Bloomberg School of Public Health Johns Hopkins University, Baltimore, Maryland, 21205, USA
- Department of Epidemiology and Health Statistics, Zhejiang University School of Public Health, Hangzhou, 310058, Zhejiang, China
| | - Mengjia Gu
- Welch Center for Prevention, Epidemiology and Clinical Research Department of Epidemiology, Bloomberg School of Public Health Johns Hopkins University, Baltimore, Maryland, 21205, USA
- Department of Epidemiology and Health Statistics, Zhejiang University School of Public Health, Hangzhou, 310058, Zhejiang, China
| | - Die Li
- Welch Center for Prevention, Epidemiology and Clinical Research Department of Epidemiology, Bloomberg School of Public Health Johns Hopkins University, Baltimore, Maryland, 21205, USA
- Department of Epidemiology and Health Statistics, Zhejiang University School of Public Health, Hangzhou, 310058, Zhejiang, China
| | - Hongbo Lin
- Center for Disease Control and Prevention of Yinzhou District, Ningbo, 215100, Zhejiang, China.
| | - Kun Chen
- Welch Center for Prevention, Epidemiology and Clinical Research Department of Epidemiology, Bloomberg School of Public Health Johns Hopkins University, Baltimore, Maryland, 21205, USA.
- Department of Epidemiology and Health Statistics, Zhejiang University School of Public Health, Hangzhou, 310058, Zhejiang, China.
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Ndong Ba A, Cazier F, Verdin A, Garcon G, Cabral M, Courcot L, Diouf A, Courcot D, Gualtieri M, Fall M. Physico-chemical characterization and in vitro inflammatory and oxidative potency of atmospheric particles collected in Dakar city's (Senegal). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 245:568-581. [PMID: 30469127 DOI: 10.1016/j.envpol.2018.11.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 10/31/2018] [Accepted: 11/08/2018] [Indexed: 06/09/2023]
Abstract
Exposure to atmospheric pollutants has been recognized as a major risk factor of respiratory and cardiovascular diseases. Fine particles (PM2.5) and a coarser fraction (PM>2.5) sampled at an urban site in Dakar (HLM), characterized by high road traffic emissions, were compared with particles sampled at a rural area, Toubab Dialaw located about 40 km from Dakar. The physicochemical characteristics of samples revealed that PMs differ for their physical (surface area) and chemical properties (in terms of CHN, metals, ions, paraffins, VOCs and PAHs) that were 65-75% higher in urban samples. Moreover the fine PMs contain higher amounts of anthropogenic related pollutants than the PM>2.5 one. These differences are sustained by the ratios reported for the analysed PAHs which suggest as predominant primary emission sources vehicle exhausts at urban site and biomass combustion at the rural site. The inflammatory response and the oxidative damages were evaluated in BEAS-2B cells by the quantification of 4 selected inflammatory cytokines (TNF-α, IL-1β, IL-6, IL-8) and of total carbonylated proteins and the oxidative DNA adduct 8-OHdG after 8 or 24 h exposure. In accordance with the different sources and different physical and chemical properties, the inflammatory response and the oxidative damages were found higher in bronchial cells exposed to urban PMs. These data confirm the importance, also for West African countries, to evaluate the correlation between PM physico-chemical properties and potential biological impacts.
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Affiliation(s)
- Awa Ndong Ba
- Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV) EA 4492, SFR Condorcet FR CNRS 3417, Maison de la Recherche en Environnement Industriel, Université du Littoral Côte d'Opale, Dunkerque, France; Laboratoire de Toxicologie et d'Hydrologie, Faculté de Médecine, de Pharmacie et d'Odontologie, Université Cheikh Anta Diop, Dakar, Senegal
| | - Fabrice Cazier
- Centre Commun de Mesures, Maison de la Recherche en Environnement Industriel, Université du Littoral Côte d'Opale, Dunkerque, France
| | - Anthony Verdin
- Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV) EA 4492, SFR Condorcet FR CNRS 3417, Maison de la Recherche en Environnement Industriel, Université du Littoral Côte d'Opale, Dunkerque, France
| | - Guillaume Garcon
- CHU Lille, Institut Pasteur de Lille, EA4483-IMPacts de l'Environnement Chimique sur la Santé Humaine (IMPECS), Univ. Lille, Lille, France
| | - Mathilde Cabral
- Laboratoire de Toxicologie et d'Hydrologie, Faculté de Médecine, de Pharmacie et d'Odontologie, Université Cheikh Anta Diop, Dakar, Senegal
| | - Lucie Courcot
- Laboratoire d'Oceanologie et de Geosciences, F-62930, CNRS UMR8187, LOG, Université du Littoral Côte d'Opale, Wimereux, France
| | - Amadou Diouf
- Laboratoire de Toxicologie et d'Hydrologie, Faculté de Médecine, de Pharmacie et d'Odontologie, Université Cheikh Anta Diop, Dakar, Senegal
| | - Dominique Courcot
- Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV) EA 4492, SFR Condorcet FR CNRS 3417, Maison de la Recherche en Environnement Industriel, Université du Littoral Côte d'Opale, Dunkerque, France
| | - Maurizio Gualtieri
- Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV) EA 4492, SFR Condorcet FR CNRS 3417, Maison de la Recherche en Environnement Industriel, Université du Littoral Côte d'Opale, Dunkerque, France.
| | - Mamadou Fall
- Laboratoire de Toxicologie et d'Hydrologie, Faculté de Médecine, de Pharmacie et d'Odontologie, Université Cheikh Anta Diop, Dakar, Senegal
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Onishi T, Honda A, Tanaka M, Chowdhury PH, Okano H, Okuda T, Shishido D, Terui Y, Hasegawa S, Kameda T, Tohno S, Hayashi M, Nishita-Hara C, Hara K, Inoue K, Yasuda M, Hirano S, Takano H. Ambient fine and coarse particles in Japan affect nasal and bronchial epithelial cells differently and elicit varying immune response. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 242:1693-1701. [PMID: 30086990 DOI: 10.1016/j.envpol.2018.07.103] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 07/20/2018] [Accepted: 07/22/2018] [Indexed: 06/08/2023]
Abstract
Ambient particulate matter (PM) epidemiologically exacerbates respiratory and immune health, including allergic rhinitis (AR) and bronchial asthma (BA). Although fine and coarse particles can affect respiratory tract, the differences in their effects on the upper and lower respiratory tract and immune system, their underlying mechanism, and the components responsible for the adverse health effects have not been yet completely elucidated. In this study, ambient fine and coarse particles were collected at three different locations in Japan by cyclone technique. Both particles collected at all locations decreased the viability of nasal epithelial cells and antigen presenting cells (APCs), increased the production of IL-6, IL-8, and IL-1β from bronchial epithelial cells and APCs, and induced expression of dendritic and epithelial cell (DEC) 205 on APCs. Differences in inflammatory responses, but not in cytotoxicity, were shown between both particles, and among three locations. Some components such as Ti, Co, Zn, Pb, As, OC (organic carbon) and EC (elemental carbon) showed significant correlations to inflammatory responses or cytotoxicity. These results suggest that ambient fine and coarse particles differently affect nasal and bronchial epithelial cells and immune response, which may depend on particles size diameter, chemical composition and source related particles types.
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Affiliation(s)
- Toshinori Onishi
- Environmental Health Division, Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan; Department of Otolaryngology-Head and Neck Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Akiko Honda
- Environmental Health Division, Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan.
| | - Michitaka Tanaka
- Environmental Health Division, Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Pratiti H Chowdhury
- Environmental Health Division, Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Hitoshi Okano
- Environmental Health Division, Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Tomoaki Okuda
- Faculty of Science and Technology, Keio University, Kanagawa, Japan
| | - Daiki Shishido
- Faculty of Science and Technology, Keio University, Kanagawa, Japan
| | - Yoshihiro Terui
- Faculty of Science and Technology, Keio University, Kanagawa, Japan
| | | | | | - Susumu Tohno
- Graduate School of Energy Science, Kyoto University, Japan
| | - Masahiko Hayashi
- Fukuoka Institute of Atmospheric Environment and Health, Fukuoka University, Japan
| | - Chiharu Nishita-Hara
- Fukuoka Institute of Atmospheric Environment and Health, Fukuoka University, Japan
| | - Keiichiro Hara
- Fukuoka Institute of Atmospheric Environment and Health, Fukuoka University, Japan
| | | | - Makoto Yasuda
- Department of Otolaryngology-Head and Neck Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Shigeru Hirano
- Department of Otolaryngology-Head and Neck Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hirohisa Takano
- Environmental Health Division, Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan
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63
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Liu Z, Wang F, Li W, Yin L, Wang Y, Yan R, Lao XQ, Kan H, Tse LA. Does utilizing WHO's interim targets further reduce the risk - meta-analysis on ambient particulate matter pollution and mortality of cardiovascular diseases? ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 242:1299-1307. [PMID: 30121484 DOI: 10.1016/j.envpol.2018.07.041] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 05/18/2018] [Accepted: 07/10/2018] [Indexed: 05/22/2023]
Abstract
Long-term exposed to ambient particulate matter (PM) has been recognized as a risk factor for cardiovascular diseases (CVDs) mortality but few studies examine the utility of WHO's interim targets (2006) concerning PM control on CVD mortality. This review aimed to synthesize the long-term exposed to ambient PM exposures on overall CVD mortality according to WHO's interim targets; meanwhile, subgroup analysis by ethnicity, smoking status and PM assessment method were also conducted. We systematically searched studies published between January 1974 and Jul 2017 in PubMed and Embase. Quality of each study was assessed using Critical Appraisal Skill Programme (CASP) checklist. Fixed-effects or random-effects model of meta-analysis was determined by the test of heterogeneity. Subgroup analyses were conducted according to ethnicity, smoking status, PM assessment method and interim PM targets of WHO guidelines. Overall, 16 eligible studies were included, covering 15,511,997 participants and 542,991 CVD deaths. Five studies concerning PM2.5 were rated as good quality. The pooled hazard ratio (HR) of every 10μg/m3 increment of PM2.5 exposure for CVD mortality was 1.12 (95%CI = 1.08-1.16), but it was not significant for PM10 (HR = 1.02, 95%CI = 0.89-1.16). Compared with the annual PM2.5 exposure level within WHO's interim targets (1.11-1.16), significantly smaller HR was observed for subjects with an exposure level below WHO's air quality guideline (HR = 1.03, 95%CI = 1.02-1.04). The pooled HR was relatively higher for studies in Asian and with at least 11 years' follow-up and those adopting relatively poor methods (category 1) in assessing PM2.5, whilst the risk was similar regardless of smoking status. Egger and Begg's tests showed no evidence for publication bias. Long-term ambient PM2.5 exposure level was positively associated with the overall CVD mortality. Different interim targets above the WHO's Air Quality Guideline level exerted a similar scale of CVD risk, but there is no evidence for a threshold.
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Affiliation(s)
- Zhiguang Liu
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR
| | - Feng Wang
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR
| | - Wentao Li
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR
| | - Lu Yin
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yuebo Wang
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ruohua Yan
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xiang Qian Lao
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR
| | - Haidong Kan
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education, & Key Lab of Health Technology Assessment of the Ministry of Health, Fudan University, Shanghai, 200032, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP), Fudan University, Shanghai, 200032, China
| | - Lap Ah Tse
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR.
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64
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Sources of Airborne Endotoxins in Ambient Air and Exposure of Nearby Communities—A Review. ATMOSPHERE 2018. [DOI: 10.3390/atmos9100375] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Endotoxin is a bioaerosol component that is known to cause respiratory effects in exposed populations. To date, most research focused on occupational exposure, whilst much less is known about the impact of emissions from industrial operations on downwind endotoxin concentrations. A review of the literature was undertaken, identifying studies that reported endotoxin concentrations in both ambient environments and around sources with high endotoxin emissions. Ambient endotoxin concentrations in both rural and urban areas are generally below 10 endotoxin units (EU) m−3; however, around significant sources such as compost facilities, farms, and wastewater treatment plants, endotoxin concentrations regularly exceeded 100 EU m−3. However, this is affected by a range of factors including sampling approach, equipment, and duration. Reported downwind measurements of endotoxin demonstrate that endotoxin concentrations can remain above upwind concentrations. The evaluation of reported data is complicated due to a wide range of different parameters including sampling approaches, temperature, and site activity, demonstrating the need for a standardised methodology and improved guidance. Thorough characterisation of ambient endotoxin levels and modelling of endotoxin from pollution sources is needed to help inform future policy and support a robust health-based risk assessment process.
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65
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Scungio M, Stabile L, Rizza V, Pacitto A, Russi A, Buonanno G. Lung cancer risk assessment due to traffic-generated particles exposure in urban street canyons: A numerical modelling approach. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 631-632:1109-1116. [PMID: 29727937 DOI: 10.1016/j.scitotenv.2018.03.093] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 02/22/2018] [Accepted: 03/09/2018] [Indexed: 06/08/2023]
Abstract
Combustion-generated nanoparticles are responsible for negative health effects due to their ability to penetrate in the lungs, carrying toxic compounds with them. In urban areas, the coexistence of nanoparticle sources and particular street-building configurations can lead to very high particle exposure levels. In the present paper, an innovative approach for the evaluation of lung cancer incidence in street canyon due to exposure to traffic-generated particles was proposed. To this end, the literature-available values of particulate matter, PAHs and heavy metals emitted from different kind of vehicles were used to calculate the Excess Lifetime Cancer Risk (ELCR) at the tailpipe. The estimated ELCR was then used as input data in a numerical CFD (Computational Fluid Dynamics) model that solves the mass, momentum, turbulence and species transport equations, in order to evaluate the cancer risk in every point of interest inside the street canyon. Thus, the influence of wind speed and street canyon geometry (H/W, height of building, H and width of the street, W) on the ELCR at street level was evaluated by means of a CFD simulation. It was found that the ELCR calculated on the leeward and windward sides of the street canyon at a breathable height of 1.5 m, for people exposed 15 min per day for 20 years, is equal to 1.5 × 10-5 and 4.8 × 10-6, respectively, for wind speed of 1 m/s and H/W equal to 1. The ELCR at street level results higher on the leeward side for aspect ratios equal to 1 and 3, while for aspect ratio equal to 2 it is higher on the windward side. In addition, the simulations showed that with the increasing of wind speed the ELCR becomes lower everywhere in the street canyon, due to the increased in dispersion.
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Affiliation(s)
- M Scungio
- Department of Economics, Engineering, Society and Business Organisation, University of Tuscia, Viterbo, Italy.
| | - L Stabile
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino (FR), Italy
| | - V Rizza
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino (FR), Italy
| | - A Pacitto
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino (FR), Italy
| | - A Russi
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino (FR), Italy
| | - G Buonanno
- Department of Engineering, University of Naples "Parthenope", Napoli, Italy; Queensland University of Technology, GPO Box 2434, Brisbane, Qld 4001, Australia
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66
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Longhin E, Holme JA, Gualtieri M, Camatini M, Øvrevik J. Milan winter fine particulate matter (wPM2.5) induces IL-6 and IL-8 synthesis in human bronchial BEAS-2B cells, but specifically impairs IL-8 release. Toxicol In Vitro 2018; 52:365-373. [PMID: 30048734 DOI: 10.1016/j.tiv.2018.07.016] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/11/2018] [Accepted: 07/20/2018] [Indexed: 01/19/2023]
Abstract
Inflammatory responses have an important role in the onset of many lung diseases associated with urban airborne particulate matter (PM). Here we investigate effects and mechanisms linked to PM-induced expression and release of two main interleukins, IL-6 and IL-8, in human bronchial epithelial BEAS-2B cells. The cells were exposed to well characterized Milan city PM, winter PM2.5 (wPM2.5) and summer PM10 (sPM10), representing combustion and non-combustion sources, respectively. Both wPM2.5 and sPM10 increased mRNA-synthesis and intracellular protein levels of IL-6 and IL-8. Exposure to sPM10 also resulted in continuous and time-dependent increases in release of IL-6 and IL-8 for up to 48 h. By comparison, in wPM2.5-exposed cells IL-8 release was not significantly augmented, while extracellular IL-6 levels were increased but remained constant beyond 24 h exposure. Moreover, wPM2.5 also reduced the lipopolysaccharide (LPS)-increased release of IL-8. No cytotoxicity or significant adsorption of cytokines to wPM2.5 were observed. Immunofluorescence microscopy revealed an accumulation of IL-8 in intracellular vesicles and alterations in actin filament organization in wPM2.5 exposed cells, suggesting that the trafficking of vesicles carrying interleukins to the plasma membrane might be inhibited. Thus, wPM2.5 appeared to impair cytokine release in BEAS-2B cells, in particular of IL-8, possibly by damaging cytoskeletal function involved in protein secretion.
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Affiliation(s)
- Eleonora Longhin
- Polaris Research Centre, Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza, 1, Milan 20126, Italy.
| | - Jørn A Holme
- Division for Infection Control and Environmental Health, Norwegian Institute of Public Health, Oslo N-0403, Norway
| | - Maurizio Gualtieri
- Polaris Research Centre, Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza, 1, Milan 20126, Italy
| | - Marina Camatini
- Polaris Research Centre, Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza, 1, Milan 20126, Italy
| | - Johan Øvrevik
- Division for Infection Control and Environmental Health, Norwegian Institute of Public Health, Oslo N-0403, Norway
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67
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Cruz GJF, Pirilä M, Matějová L, Ainassaari K, Solis JL, Fajgar R, Šolcová O, Keiski RL. Two Unconventional Precursors to Produce ZnCl2
-Based Activated Carbon for Water Treatment Applications. Chem Eng Technol 2018. [DOI: 10.1002/ceat.201800150] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Gerardo Juan Francisco Cruz
- Universidad Nacional de Tumbes; Facultad de Ciencias Agrarias, Laboratorio de Análisis Ambiental; Av. Universitaria s/n, Campus Universitario - Pampa Grande Tumbes Perú
| | - Minna Pirilä
- University of Oulu; Faculty of Technology, Environmental and Chemical Engineering; P.O. Box 4300 90014 Oulu Finland
| | - Lenka Matějová
- Institute of Chemical Process Fundamentals of the CAS; Rozvojová 135 16502 Prague Czech Republic
- VSB-Technical University of Ostrava; Institute of Environmental Technology; listopadu 15/2172 70800 Ostrava-Poruba Czech Republic
| | - Kaisu Ainassaari
- University of Oulu; Faculty of Technology, Environmental and Chemical Engineering; P.O. Box 4300 90014 Oulu Finland
| | - Jose Luis Solis
- Universidad Nacional de Ingeniería; Facultad de Ciencias, Laboratorio de Materiales Funcionales; Av. Tupac Amaru 210 Lima Perú
| | - Radek Fajgar
- Institute of Chemical Process Fundamentals of the CAS; Rozvojová 135 16502 Prague Czech Republic
| | - Olga Šolcová
- Institute of Chemical Process Fundamentals of the CAS; Rozvojová 135 16502 Prague Czech Republic
| | - Riitta Liisa Keiski
- University of Oulu; Faculty of Technology, Environmental and Chemical Engineering; P.O. Box 4300 90014 Oulu Finland
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68
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Martens DS, Nawrot TS. Ageing at the level of telomeres in association to residential landscape and air pollution at home and work: a review of the current evidence. Toxicol Lett 2018; 298:42-52. [PMID: 29944903 DOI: 10.1016/j.toxlet.2018.06.1213] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 06/06/2018] [Accepted: 06/19/2018] [Indexed: 12/13/2022]
Abstract
Studies suggest that leukocyte telomere length is an index of systemic ageing. Here, we discuss telomere length as a marker of biological ageing in relation to residential landscape (greenness), residential air pollution and work-related exposures. Telomere lengths are memories of cumulative oxidative and inflammatory stress, and show to have inverse associations with the risk of non-communicable diseases. For this reason, telomeres are considered as markers of biological ageing. Studies at birth, in children, young adulthood, and elderly show that residential green space, lower traffic exposure and long-term lower exposure to particulate air pollution are associated with longer telomeres. Work-related exposures including exposure to toxic metals, polycyclic aromatic hydrocarbons and particulate matter are associated with shorter telomeres for a given age. In contrast to chronic exposures, evidence is present of the observation that recent exposure is associated with longer telomeres. Our overview shows that the magnitude of residential and work-related environmental factors on telomere length are often as important as many classical lifestyle factors.
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Affiliation(s)
- Dries S Martens
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium; Department of Public Health & Primary Care, Leuven University, Leuven, Belgium.
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69
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Gawda A, Majka G, Nowak B, Śróttek M, Walczewska M, Marcinkiewicz J. Air particulate matter SRM 1648a primes macrophages to hyperinflammatory response after LPS stimulation. Inflamm Res 2018; 67:765-776. [PMID: 29922853 PMCID: PMC6096616 DOI: 10.1007/s00011-018-1165-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 05/14/2018] [Accepted: 06/15/2018] [Indexed: 12/31/2022] Open
Abstract
Objective Exposure to air particulate matter (PM) is associated with chronic inflammatory and autoimmune diseases. Macrophages are responsible for the regulation of chronic inflammation. However, whether PM affects macrophage polarization remains unclear. The aim of this study was to evaluate whether nontoxic concentrations of urban PM are able to prime macrophages to altered inflammatory response upon LPS challenge. Methods We used two forms of the urban particulate matter SRM 1648a, intact PM and PM deprived of organic compounds (PM∆C). Peritoneal murine macrophages were exposed to different concentrations of PM for 24 h and then challenged with LPS. Production of inflammatory mediators by macrophages was measured to test immunostimulatory/priming capacity of PM. Results Particulate matter used at non-cytotoxic concentrations induced a dose-dependent production of proinflammatory cytokines (TNF-α, IL-6, IL-12p40). By contrast, PM∆C were not able to stimulate macrophages. However, macrophages primed with both forms of PM show proinflammatory response upon LPS challenge. Conclusions Our data indicate that exposure of macrophages to low concentrations of PM may prime the cells to hyperinflammatory response upon contact with LPS. Further studies are necessary to explain whether the exposure of patients suffering from chronic inflammatory diseases to particulate matter is responsible for the exacerbation of clinical symptoms during bacterial infections.
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Affiliation(s)
- Anna Gawda
- Chair of Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Grzegorz Majka
- Chair of Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Bernadeta Nowak
- Chair of Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Małgorzata Śróttek
- Chair of Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Maria Walczewska
- Chair of Immunology, Jagiellonian University Medical College, Kraków, Poland
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70
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Ljubimova JY, Braubach O, Patil R, Chiechi A, Tang J, Galstyan A, Shatalova ES, Kleinman MT, Black KL, Holler E. Coarse particulate matter (PM 2.5-10) in Los Angeles Basin air induces expression of inflammation and cancer biomarkers in rat brains. Sci Rep 2018; 8:5708. [PMID: 29632393 PMCID: PMC5890281 DOI: 10.1038/s41598-018-23885-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Accepted: 03/20/2018] [Indexed: 12/24/2022] Open
Abstract
Air pollution is linked to brain inflammation, which accelerates tumorigenesis and neurodegeneration. The molecular mechanisms that connect air pollution with brain pathology are largely unknown but seem to depend on the chemical composition of airborne particulate matter (PM). We sourced ambient PM from Riverside, California, and selectively exposed rats to coarse (PM2.5–10: 2.5–10 µm), fine (PM<2.5: <2.5 µm), or ultrafine particles (UFPM: <0.15 µm). We characterized each PM type via atomic emission spectroscopy and detected nickel, cobalt and zinc within them. We then exposed rats separately to each PM type for short (2 weeks), intermediate (1–3 months) and long durations (1 year). All three metals accumulated in rat brains during intermediate-length PM exposures. Via RNAseq analysis we then determined that intermediate-length PM2.5–10 exposures triggered the expression of the early growth response gene 2 (EGR2), genes encoding inflammatory cytokine pathways (IL13-Rα1 and IL-16) and the oncogene RAC1. Gene upregulation occurred only in brains of rats exposed to PM2.5–10 and correlated with cerebral nickel accumulation. We hypothesize that the expression of inflammation and oncogenesis-related genes is triggered by the combinatorial exposure to certain metals and toxins in Los Angeles Basin PM2.5–10.
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Affiliation(s)
- Julia Y Ljubimova
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, 90048, USA
| | - Oliver Braubach
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, 90048, USA.
| | - Rameshwar Patil
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, 90048, USA
| | - Antonella Chiechi
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, 90048, USA
| | - Jie Tang
- Genomics Core, Cedars-Sinai Medical Center, Los Angeles, 90048, USA
| | - Anna Galstyan
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, 90048, USA
| | | | - Michael T Kleinman
- Department of Community and Environmental Medicine Air Pollution Health Effects Laboratory, University of California, Irvine, 92697, USA
| | - Keith L Black
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, 90048, USA
| | - Eggehard Holler
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, 90048, USA.,Institut für Biophysik und Physikalische Biochemie der Universität Regensburg, Regensburg, 93040, Germany
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71
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Sturm R. Theoretical and experimental approaches to the deposition and clearance of ultrafine carcinogens in the human respiratory tract. Thorac Cancer 2018; 2:61-68. [PMID: 27755809 DOI: 10.1111/j.1759-7714.2011.00042.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
INTRODUCTION Although inhaled ultrafine particles (UFPs) represent serious lung burdens and are thus responsible for a remarkable number of respiratory diseases (including cancer), only limited information on their deposition and clearance in the lung compartments is available. The study presented here tries to overcome this deficit by using a detailed theoretical approach to UFP behavior in the lungs. METHODS The deposition model used in this context is based upon a stochastic lung geometry and the generation of single-particle trajectories in the tracheobronchial tree according to the random walk algorithm. Simulation of UFP clearance is conducted with the help of a multi-compartment model that considers cellular/non-cellular sites of temporary particle storage as separate compartments. RESULTS As predicted by the models and confirmed by experimental findings, deposition of UFPs by Brownian motion takes place in both the upper and lower compartments of the respiratory tract. Alveolar accumulation of particulate mass increases proportionally with the inhalative flow rate. Clearance of UFPs is chiefly dominated by slow mechanisms with respective half-times ranging from several days to months. DISCUSSION Modeling of UFP behavior in the respiratory tract represents an appropriate tool for forthcoming medical studies on this particle class, but it needs to be subjected to further refinements. • As outlined by this study, alveolar deposition of UFPs, correlating with a noticeable risk of malignant transformations and cancer development, is determined by a number of factors, including effective particle size and velocity of particle transport in the conducting airways. • With the help of appropriately validated models, respective predictions on the pulmonary burdens of UFP after short-term or long-term exposure can be made. In the case of subjects suffering from bronchial and/or alveolar UFP overloads, respective clearance approaches may be applied to simulate particle removal scenarios.
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Affiliation(s)
- Robert Sturm
- Division of Physics and Biophysics, Department of Material Science and Physics, University of Salzburg, Salzburg, Austria
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72
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Farokhi A, Heederik D, Smit LAM. Respiratory health effects of exposure to low levels of airborne endotoxin - a systematic review. Environ Health 2018; 17:14. [PMID: 29422043 PMCID: PMC5806377 DOI: 10.1186/s12940-018-0360-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 01/30/2018] [Indexed: 05/20/2023]
Abstract
BACKGROUND Elevated endotoxin levels have been measured in ambient air around livestock farms, which is a cause of concern for neighbouring residents. There is clear evidence that occupational exposure to high concentrations of airborne endotoxin causes respiratory inflammation, respiratory symptoms and lung function decline. However, health effects of exposure to low levels of endotoxin are less well described. The aim of this systematic review is to summarize published associations between exposure to relatively low levels of airborne endotoxin and respiratory health endpoints. METHODS Studies investigating respiratory effects of measured or modelled exposure to low levels of airborne endotoxin (average < 100 EU/m3) were eligible for inclusion. In total, 1362 articles were identified through a Pubmed database search, of which 31 articles were included in this review. Studies were included up to February 2017. Overview tables and forest plots were created, and study quality was assessed. RESULTS Twenty-two included studies had a cross-sectional design, others were designed as longitudinal observational (n = 7) or experimental (n = 2) studies. Most studies (n = 23) were conducted in an occupational setting, some involved domestic or experimental exposure. Several studies reported statistically significant effects of exposure to low levels of endotoxin on respiratory symptoms and lung function. However, considerable heterogeneity existed in the outcomes of the included studies and no overall estimate could be provided by meta-analysis to quantify the possible relationship. Instead, a best evidence synthesis was performed among studies examining the exposure-response relationship between endotoxin and respiratory outcomes. Significant exposure-response relationships between endotoxin and symptoms and FEV1 were shown in several studies, with no conflicting findings in the studies included in the best evidence synthesis. Significantly different effects of endotoxin exposure were also seen in vulnerable subgroups (atopics and patients with broncho-obstructive disease) and smokers. CONCLUSIONS Respiratory health effects of exposure to low levels of airborne endotoxin (< 100 EU/m3) seem plausible. Future studies are needed to investigate ambient exposure to endotoxin and potential respiratory health effects, especially in vulnerable subgroups of the population.
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Affiliation(s)
- Azadèh Farokhi
- Institute for Risk Assessment Sciences (IRAS), Utrecht University, P.O. Box 80.178, 3508TD, Utrecht, The Netherlands
| | - Dick Heederik
- Institute for Risk Assessment Sciences (IRAS), Utrecht University, P.O. Box 80.178, 3508TD, Utrecht, The Netherlands
| | - Lidwien A M Smit
- Institute for Risk Assessment Sciences (IRAS), Utrecht University, P.O. Box 80.178, 3508TD, Utrecht, The Netherlands.
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Zhou N, Jiang C, Chen Q, Yang H, Wang X, Zou P, Sun L, Liu J, Li L, Li L, Huang L, Chen H, Ao L, Zhou Z, Liu J, Cui Z, Cao J. Exposures to Atmospheric PM 10 and PM 10-2.5 Affect Male Semen Quality: Results of MARHCS Study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:1571-1581. [PMID: 29320852 DOI: 10.1021/acs.est.7b05206] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Studies have shown that the effects of ambient particulate matter (PM) may be related to particle's size. However, results on the relationships between different PM and reproductive health are controversial. To explore the impacts of various PM fractions on male reproductive health, a total of 796 eligible subjects recruited in 2013 baseline investigation. In addition, there were 656 (82.4%) and 568 (71.3%) subjects participated follow-up surveys in 2014 and 2015, respectively. We used multivariable regression analysis and mixed-effect model to investigate the associations between air pollutants PM10, PM10-2.5, and PM2.5 exposures and semen quality, sperm DNA fragmentation and serum reproductive hormones of subjects. In the preliminary regression analysis, PM10, PM10-2.5, and PM2.5 exposure all associated with sperm concentration, morphology, sperm high DNA stainability (HDS), serum estradiol and testosterone levels. However, in mixed models, we only found that PM10 exposure were negatively associated with sperm normal morphology (95% CI: -14.13, -24.47) but positively associated with sperm progressive motility (95% CI: 23.00, 8.49), and PM10-2.5 exposure was inversely associated with sperm concentration (95% CI: -9.06, -27.31) after multiplicity adjustment. Our results provide the evidence that air PM10 and PM10-2.5 exposures, not PM2.5, are risk factors of semen quality.
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Affiliation(s)
- Niya Zhou
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Changtan Jiang
- Ecological and Environmental Monitoring Center of Chongqing, Chongqing, China
| | - Qing Chen
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Huan Yang
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Xiaogang Wang
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Peng Zou
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Lei Sun
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Jiaojiao Liu
- Ecological and Environmental Monitoring Center of Chongqing, Chongqing, China
| | - Ling Li
- Ecological and Environmental Monitoring Center of Chongqing, Chongqing, China
| | - Lianbing Li
- Key Laboratory of Birth Defects and Reproductive Health of the National Health and Family Planning Commission, Chongqing Population and Family Planning Science and Technology Research Institute , Chongqing, China
| | - Linping Huang
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Hongqiang Chen
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Lin Ao
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Ziyuan Zhou
- Department of Environmental Health, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Jinyi Liu
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Zhihong Cui
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
| | - Jia Cao
- Key Lab of Medical Protection for Electromagnetic Radiation, Ministry of Education of China, Institute of Toxicology, College of Preventive Medicine, Third Military Medical University , Chongqing, China
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Chaurasiya S, Mishra V. Biodegradable nanoparticles as theranostics of ovarian cancer: an overview. J Pharm Pharmacol 2018; 70:435-449. [DOI: 10.1111/jphp.12860] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 11/15/2017] [Indexed: 12/28/2022]
Abstract
Abstract
Objectives
Above 10 million people are suffering from cancers every year. As per American Cancer Society, more than 22 440 new cases and 14 080 deaths were reported from ovarian cancer yearly worldwide. This review explores the current status, challenges and future perspectives of tumour-targeted theranostic nanoparticles (NPs).
Key findings
Most of the ovarian malignancy cases are uncovered after the disease is in a difficult state due to poor screening techniques and non-specific symptoms. In this manner, forceful and fruitful treatment is required that will indicate insignificant lethal impacts to solid tissue. In the current research, stealth biodegradable NPs are produced as vehicles for imaging and treatment of ovarian cancer as the controlled and targeted delivery of chemotherapeutic as well as imaging agents. To enhance the dependability of the colloidal suspension as well as to increase their circulation lifetime, NPs are introduced by incorporating the functional poly(ethylene glycol) on their surface, which also provides a site to conjugation of focusing on agents to ovarian tissue.
Summary
Biodegradable theranostic NPs can be fabricated and surface engineered without any alteration in drug-loading capacity, safety and efficacy. These NPs have shown promising results in imaging as well as treatment of ovarian cancer.
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Affiliation(s)
- Swati Chaurasiya
- Department of Pharmaceutics, Lovely Institute of Technology (Pharmacy), Lovely Professional University, Phagwara, India
| | - Vijay Mishra
- Department of Pharmaceutics, Lovely Institute of Technology (Pharmacy), Lovely Professional University, Phagwara, India
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Martens DS, Cox B, Janssen BG, Clemente DBP, Gasparrini A, Vanpoucke C, Lefebvre W, Roels HA, Plusquin M, Nawrot TS. Prenatal Air Pollution and Newborns' Predisposition to Accelerated Biological Aging. JAMA Pediatr 2017; 171:1160-1167. [PMID: 29049509 PMCID: PMC6233867 DOI: 10.1001/jamapediatrics.2017.3024] [Citation(s) in RCA: 175] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
IMPORTANCE Telomere length is a marker of biological aging that may provide a cellular memory of exposures to oxidative stress and inflammation. Telomere length at birth has been related to life expectancy. An association between prenatal air pollution exposure and telomere length at birth could provide new insights in the environmental influence on molecular longevity. OBJECTIVE To assess the association of prenatal exposure to particulate matter (PM) with newborn telomere length as reflected by cord blood and placental telomere length. DESIGN, SETTING, AND PARTICIPANTS In a prospective birth cohort (ENVIRONAGE [Environmental Influence on Ageing in Early Life]), a total of 730 mother-newborn pairs were recruited in Flanders, Belgium between February 2010 and December 2014, all with a singleton full-term birth (≥37 weeks of gestation). For statistical analysis, participants with full data on both cord blood and placental telomere lengths were included, resulting in a final study sample size of 641. EXPOSURES Maternal residential PM2.5 (particles with an aerodynamic diameter ≤2.5 μm) exposure during pregnancy. MAIN OUTCOMES AND MEASURES In the newborns, cord blood and placental tissue relative telomere length were measured. Maternal residential PM2.5 exposure during pregnancy was estimated using a high-resolution spatial-temporal interpolation method. In distributed lag models, both cord blood and placental telomere length were associated with average weekly exposures to PM2.5 during pregnancy, allowing the identification of critical sensitive exposure windows. RESULTS In 641 newborns, cord blood and placental telomere length were significantly and inversely associated with PM2.5 exposure during midgestation (weeks 12-25 for cord blood and weeks 15-27 for placenta). A 5-µg/m3 increment in PM2.5 exposure during the entire pregnancy was associated with 8.8% (95% CI, -14.1% to -3.1%) shorter cord blood leukocyte telomeres and 13.2% (95% CI, -19.3% to -6.7%) shorter placental telomere length. These associations were controlled for date of delivery, gestational age, maternal body mass index, maternal age, paternal age, newborn sex, newborn ethnicity, season of delivery, parity, maternal smoking status, maternal educational level, pregnancy complications, and ambient temperature. CONCLUSIONS AND RELEVANCE Mothers who were exposed to higher levels of PM2.5 gave birth to newborns with shorter telomere length. The observed telomere loss in newborns by prenatal air pollution exposure indicates less buffer for postnatal influences of factors decreasing telomere length during life. Therefore, improvements in air quality may promote molecular longevity from birth onward.
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Affiliation(s)
- Dries S Martens
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Bianca Cox
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Bram G Janssen
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Diana B P Clemente
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium.,Instituto de Salud Global, Centre for Research in Environmental Epidemiology, Barcelona, Spain.,Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona, Spain
| | - Antonio Gasparrini
- Department of Social and Environmental Health Research, London School of Hygiene & Tropical Medicine (LSHTM), London, England.,Department of Medical Statistics, LSHTM, London, England
| | | | | | - Harry A Roels
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium.,Louvain Centre for Toxicology and Applied Pharmacology, Université catholique de Louvain, Brussels, Belgium
| | - Michelle Plusquin
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium.,Department of Public Health & Primary Care, Leuven University, Leuven, Belgium
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Vignal C, Pichavant M, Alleman LY, Djouina M, Dingreville F, Perdrix E, Waxin C, Ouali Alami A, Gower-Rousseau C, Desreumaux P, Body-Malapel M. Effects of urban coarse particles inhalation on oxidative and inflammatory parameters in the mouse lung and colon. Part Fibre Toxicol 2017; 14:46. [PMID: 29166940 PMCID: PMC5700563 DOI: 10.1186/s12989-017-0227-z] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 11/10/2017] [Indexed: 12/15/2022] Open
Abstract
Background Air pollution is a recognized aggravating factor for pulmonary diseases and has notably deleterious effects on asthma, bronchitis and pneumonia. Recent studies suggest that air pollution may also cause adverse effects in the gastrointestinal tract. Accumulating experimental evidence shows that immune responses in the pulmonary and intestinal mucosae are closely interrelated, and that gut-lung crosstalk controls pathophysiological processes such as responses to cigarette smoke and influenza virus infection. Our first aim was to collect urban coarse particulate matter (PM) and to characterize them for elemental content, gastric bioaccessibility, and oxidative potential; our second aim was to determine the short-term effects of urban coarse PM inhalation on pulmonary and colonic mucosae in mice, and to test the hypothesis that the well-known antioxidant N-acetyl-L-cysteine (NAC) reverses the effects of PM inhalation. Results The collected PM had classical features of urban particles and possessed oxidative potential partly attributable to their metal fraction. Bioaccessibility study confirmed the high solubility of some metals at the gastric level. Male mice were exposed to urban coarse PM in a ventilated inhalation chamber for 15 days at a concentration relevant to episodic elevation peak of air pollution. Coarse PM inhalation induced systemic oxidative stress, recruited immune cells to the lung, and increased cytokine levels in the lung and colon. Concomitant oral administration of NAC reversed all the observed effects relative to the inhalation of coarse PM. Conclusions Coarse PM-induced low-grade inflammation in the lung and colon is mediated by oxidative stress and deserves more investigation as potentiating factor for inflammatory diseases. Electronic supplementary material The online version of this article (10.1186/s12989-017-0227-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Cécile Vignal
- Inserm, CHU Lille, U995-LIRIC-Lille Inflammation Research International Center, Univ. Lille, F-59000, Lille, France
| | - Muriel Pichavant
- Inserm U1019, CNRS UMR 8204, Institut Pasteur de Lille- CIIL - Center for Infection and Immunity of Lille, Univ. Lille, F-59000, Lille, France
| | - Laurent Y Alleman
- SAGE - Département Sciences de l'Atmosphère et Génie de l'Environnement, IMT Lille Douai, Univ. Lille, 59000, Lille, France
| | - Madjid Djouina
- Inserm, CHU Lille, U995-LIRIC-Lille Inflammation Research International Center, Univ. Lille, F-59000, Lille, France
| | - Florian Dingreville
- Inserm, CHU Lille, U995-LIRIC-Lille Inflammation Research International Center, Univ. Lille, F-59000, Lille, France
| | - Esperanza Perdrix
- SAGE - Département Sciences de l'Atmosphère et Génie de l'Environnement, IMT Lille Douai, Univ. Lille, 59000, Lille, France
| | - Christophe Waxin
- Inserm, CHU Lille, U995-LIRIC-Lille Inflammation Research International Center, Univ. Lille, F-59000, Lille, France
| | - Adil Ouali Alami
- Inserm U1019, CNRS UMR 8204, Institut Pasteur de Lille- CIIL - Center for Infection and Immunity of Lille, Univ. Lille, F-59000, Lille, France
| | - Corinne Gower-Rousseau
- Inserm, CHU Lille, U995-LIRIC-Lille Inflammation Research International Center, Univ. Lille, F-59000, Lille, France
| | - Pierre Desreumaux
- Inserm, CHU Lille, U995-LIRIC-Lille Inflammation Research International Center, Univ. Lille, F-59000, Lille, France
| | - Mathilde Body-Malapel
- Inserm, CHU Lille, U995-LIRIC-Lille Inflammation Research International Center, Univ. Lille, F-59000, Lille, France.
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Stone V, Miller MR, Clift MJD, Elder A, Mills NL, Møller P, Schins RPF, Vogel U, Kreyling WG, Alstrup Jensen K, Kuhlbusch TAJ, Schwarze PE, Hoet P, Pietroiusti A, De Vizcaya-Ruiz A, Baeza-Squiban A, Teixeira JP, Tran CL, Cassee FR. Nanomaterials Versus Ambient Ultrafine Particles: An Opportunity to Exchange Toxicology Knowledge. ENVIRONMENTAL HEALTH PERSPECTIVES 2017; 125:106002. [PMID: 29017987 PMCID: PMC5933410 DOI: 10.1289/ehp424] [Citation(s) in RCA: 213] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 08/12/2016] [Accepted: 08/30/2016] [Indexed: 05/05/2023]
Abstract
BACKGROUND A rich body of literature exists that has demonstrated adverse human health effects following exposure to ambient air particulate matter (PM), and there is strong support for an important role of ultrafine (nanosized) particles. At present, relatively few human health or epidemiology data exist for engineered nanomaterials (NMs) despite clear parallels in their physicochemical properties and biological actions in in vitro models. OBJECTIVES NMs are available with a range of physicochemical characteristics, which allows a more systematic toxicological analysis. Therefore, the study of ultrafine particles (UFP, <100 nm in diameter) provides an opportunity to identify plausible health effects for NMs, and the study of NMs provides an opportunity to facilitate the understanding of the mechanism of toxicity of UFP. METHODS A workshop of experts systematically analyzed the available information and identified 19 key lessons that can facilitate knowledge exchange between these discipline areas. DISCUSSION Key lessons range from the availability of specific techniques and standard protocols for physicochemical characterization and toxicology assessment to understanding and defining dose and the molecular mechanisms of toxicity. This review identifies a number of key areas in which additional research prioritization would facilitate both research fields simultaneously. CONCLUSION There is now an opportunity to apply knowledge from NM toxicology and use it to better inform PM health risk research and vice versa. https://doi.org/10.1289/EHP424.
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Affiliation(s)
- Vicki Stone
- Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot-Watt University, Edinburgh, Scotland, UK
| | - Mark R Miller
- Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, Scotland, UK
| | - Martin J D Clift
- Adolphe Merkle Institute, University of Fribourg, Fribourg, Switzerland
- Swansea University Medical School, Swansea, Wales, UK
| | - Alison Elder
- University of Rochester Medical Center, Rochester, New York
| | - Nicholas L Mills
- Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, Scotland, UK
| | - Peter Møller
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Roel P F Schins
- IUF Leibniz-Institut für Umweltmedizinische Forschung, Düsseldorf, Germany
| | - Ulla Vogel
- National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Micro- and Nanotechnology, Technical University of Denmark, Lyngby, Denmark
| | - Wolfgang G Kreyling
- Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Institute of Epidemiology, Munich, Germany
| | | | - Thomas A J Kuhlbusch
- Air Quality & Sustainable Nanotechnology Unit, Institut für Energie- und Umwelttechnik e. V. (IUTA), Duisburg, Germany
- Federal Institute of Occupational Safety and Health, Duisburg, Germany
| | | | - Peter Hoet
- Center for Environment and Health, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Antonio Pietroiusti
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Andrea De Vizcaya-Ruiz
- Departmento de Toxicología, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV-IPN), México City, México
| | | | - João Paulo Teixeira
- National Institute of Health, Porto, Portugal
- Instituto de Saúde Pública da Universidade do Porto–Epidemiology (ISPUP-EPI) Unit, Porto, Portugal
| | - C Lang Tran
- Institute of Occupational Medicine, Edinburgh, Scotland, UK
| | - Flemming R Cassee
- National Institute for Public Health and the Environment, Bilthoven, Netherlands
- Institute of Risk Assessment Sciences, Utrecht University, Utrecht, Netherlands
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Soppa VJ, Schins RPF, Hennig F, Nieuwenhuijsen MJ, Hellack B, Quass U, Kaminski H, Sasse B, Shinnawi S, Kuhlbusch TAJ, Hoffmann B. Arterial blood pressure responses to short-term exposure to fine and ultrafine particles from indoor sources - A randomized sham-controlled exposure study of healthy volunteers. ENVIRONMENTAL RESEARCH 2017; 158:225-232. [PMID: 28662448 DOI: 10.1016/j.envres.2017.06.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 06/09/2017] [Accepted: 06/10/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVES Particulate air pollution is linked to adverse cardiovascular effects. The aim of the study was to investigate the effect of short-term exposure to indoor particles on blood pressure (BP). METHODS We analyzed the association of particle emissions from indoor sources (candle burning, toasting bread, frying sausages) with BP changes in 54 healthy volunteers in a randomized cross-over controlled exposure study. Particle mass concentration (PMC), size-specific particle number concentration (PNC) and lung-deposited particle surface area concentration (PSC) were measured during the 2h exposure. Systolic and diastolic blood pressure were measured before, during, directly, 2, 4 and 24h after exposure. We performed multiple mixed linear regression analyses of different particle metrics and BP. RESULTS BP significantly increased with increasing PMC, PSC and PNC resulting from toasting bread. For example, an increase per 10µg/m3 PM10 and PM2.5, systolic BP increased at all time points with largest changes 1h after exposure initiation of 1.5mmHg (95%-CI: 1.1; 1.9) and of 2.2mmHg (95%-CI: 1.3; 3.1), respectively. CONCLUSIONS Our study suggests an association of short-term exposure to fine and ultrafine particles emitted from toasting bread with increases in BP. Particles emitted from frying sausages and candle burning did not consistently affect BP.
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Affiliation(s)
- Vanessa J Soppa
- University of Düsseldorf, Institute for Occupational, Social and Environmental Medicine, Medical Faculty, 40225 Düsseldorf, Germany.
| | - Roel P F Schins
- IUF-Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225 Düsseldorf, Germany.
| | - Frauke Hennig
- University of Düsseldorf, Institute for Occupational, Social and Environmental Medicine, Medical Faculty, 40225 Düsseldorf, Germany.
| | | | - Bryan Hellack
- Institute of Energy and Environmental Technology (IUTA) e.V., Bliersheimer Straße 58-60, 47229 Duisburg, Germany.
| | - Ulrich Quass
- Institute of Energy and Environmental Technology (IUTA) e.V., Bliersheimer Straße 58-60, 47229 Duisburg, Germany.
| | - Heinz Kaminski
- Institute of Energy and Environmental Technology (IUTA) e.V., Bliersheimer Straße 58-60, 47229 Duisburg, Germany.
| | - Birgitta Sasse
- University of Düsseldorf, Institute for Occupational, Social and Environmental Medicine, Medical Faculty, 40225 Düsseldorf, Germany.
| | - Samir Shinnawi
- University of Düsseldorf, Institute for Occupational, Social and Environmental Medicine, Medical Faculty, 40225 Düsseldorf, Germany.
| | - Thomas A J Kuhlbusch
- Center for Nanointegration (CENIDE), University of Duisburg-Essen, Carl-Benz-Straße 199, 47057 Duisburg, Germany; Federal Institute for Occupational Safety and Health (BAuA), Friedrich-Henkel-Weg 1 - 25, 44149 Dortmund, Germany.
| | - Barbara Hoffmann
- University of Düsseldorf, Institute for Occupational, Social and Environmental Medicine, Medical Faculty, 40225 Düsseldorf, Germany.
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Schulze F, Gao X, Virzonis D, Damiati S, Schneider MR, Kodzius R. Air Quality Effects on Human Health and Approaches for Its Assessment through Microfluidic Chips. Genes (Basel) 2017; 8:E244. [PMID: 28953246 PMCID: PMC5664094 DOI: 10.3390/genes8100244] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 09/11/2017] [Accepted: 09/20/2017] [Indexed: 01/16/2023] Open
Abstract
Air quality depends on the various gases and particles present in it. Both natural phenomena and human activities affect the cleanliness of air. In the last decade, many countries experienced an unprecedented industrial growth, resulting in changing air quality values, and correspondingly, affecting our life quality. Air quality can be accessed by employing microchips that qualitatively and quantitatively determine the present gases and dust particles. The so-called particular matter 2.5 (PM2.5) values are of high importance, as such small particles can penetrate the human lung barrier and enter the blood system. There are cancer cases related to many air pollutants, and especially to PM2.5, contributing to exploding costs within the healthcare system. We focus on various current and potential future air pollutants, and propose solutions on how to protect our health against such dangerous substances. Recent developments in the Organ-on-Chip (OoC) technology can be used to study air pollution as well. OoC allows determination of pollutant toxicity and speeds up the development of novel pharmaceutical drugs.
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Affiliation(s)
- Frank Schulze
- German Federal Institute for Risk Assessment (BfR), German Centre for the Protection of Laboratory Animals (Bf3R), 10589 Berlin, Germany.
| | - Xinghua Gao
- iSmart, Materials Genome Institute, Shanghai University (SHU), Shanghai 201800, China.
| | - Darius Virzonis
- Department of Electrical Engineering, Kaunas University of Technology, 35212 Panevezys, Lithuania.
| | - Samar Damiati
- Department of Biochemistry, King Abdulaziz University, Jeddah 80203, Saudi Arabia.
- Institute for Synthetic Bioarchitecture, Department of Nanobiotechnology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria.
| | - Marlon R Schneider
- German Federal Institute for Risk Assessment (BfR), German Centre for the Protection of Laboratory Animals (Bf3R), 10589 Berlin, Germany.
| | - Rimantas Kodzius
- German Federal Institute for Risk Assessment (BfR), German Centre for the Protection of Laboratory Animals (Bf3R), 10589 Berlin, Germany.
- iSmart, Materials Genome Institute, Shanghai University (SHU), Shanghai 201800, China.
- Mathematics and Natural Sciences Department, The American University of Iraq, Sulaimani, Sulaymaniyah 46001, Iraq.
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80
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Schmalz G, Hickel R, van Landuyt KL, Reichl FX. Nanoparticles in dentistry. Dent Mater 2017; 33:1298-1314. [PMID: 28951037 DOI: 10.1016/j.dental.2017.08.193] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 08/21/2017] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Nanoparticles having a size from 1 to 100nm are present in nature and are successfully used in many products of daily life. Nanoparticles are also embedded per se or as byproducts from milling processes of larger filler particles in many dental materials. METHODS AND RESULTS Recently, possible adverse effects of nanoparticles have gained increased interest with the lungs being a main target organ. Exposure to nanoparticles in dentistry may occur in the dental laboratory, by processing gypsum type products or by grinding and polishing materials. In the dental practice virtually no exposure to nanoparticles occurs when handling unset materials. However, nanoparticles are produced by intraoral adjustment of set restorative materials through grinding/polishing regardless whether they contain nanoparticles or not. Nanoparticles may also be produced through wear of restorations or released from dental implants and they enter the environment when removing restorations. The risk for dental technicians is taken care of by legal regulations. Based on model worst case mass-based calculations, the exposure of dental practice personnel and patients to nanoparticles through intraoral grinding/polishing and wear is low to negligible. Accordingly, the additional risk due to nanoparticles exposure from present materials is considered to be low. However, more research is needed, especially on vulnerable groups (asthma or COPD). An assessment of risks for the environment is not possible due to the lack of data. SIGNIFICANCE Measures to reduce exposure to nanoparticles include intraorally grinding/polishing using water coolants, proper sculpturing to reduce the need for grinding and sufficient ventilation of treatment areas.
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Affiliation(s)
- Gottfried Schmalz
- Department of Conservative Dentistry and Periodontology, University Hospital, Regensburg, Germany
| | - Reinhard Hickel
- Department of Conservative Dentistry and Periodontology, University Hospital, LMU Munich, Germany
| | | | - Franz-Xaver Reichl
- Department of Conservative Dentistry and Periodontology, University Hospital, LMU Munich, Germany.
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Gorr MW, Falvo MJ, Wold LE. Air Pollution and Other Environmental Modulators of Cardiac Function. Compr Physiol 2017; 7:1479-1495. [PMID: 28915333 PMCID: PMC7249238 DOI: 10.1002/cphy.c170017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Cardiovascular disease (CVD) is the leading cause of death in developed regions and a worldwide health concern. Multiple external causes of CVD are well known, including obesity, diabetes, hyperlipidemia, age, and sedentary behavior. Air pollution has been linked with the development of CVD for decades, though the mechanistic characterization remains unknown. In this comprehensive review, we detail the background and epidemiology of the effects of air pollution and other environmental modulators on the heart, including both short- and long-term consequences. Then, we provide the experimental data and current hypotheses of how pollution is able to cause the CVD, and how exposure to pollutants is exacerbated in sensitive states. Published 2017. Compr Physiol 7:1479-1495, 2017.
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Affiliation(s)
- Matthew W. Gorr
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner College of Medicine, Columbus, Ohio, USA
- College of Nursing, The Ohio State University, Columbus, Ohio, USA
| | - Michael J. Falvo
- War Related Illness and Injury Study Center, Department of Veterans Affairs, New Jersey Health Care System, East Orange, New Jersey, USA
- New Jersey Medical School, Rutgers Biomedical and Health Sciences, Newark, New Jersey, USA
| | - Loren E. Wold
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner College of Medicine, Columbus, Ohio, USA
- College of Nursing, The Ohio State University, Columbus, Ohio, USA
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, Ohio, USA
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Chua ML, Setyawati MI, Li H, Fang CHY, Gurusamy S, Teoh FTL, Leong DT, George S. Particulate matter from indoor environments of classroom induced higher cytotoxicity and leakiness in human microvascular endothelial cells in comparison with those collected from corridor. INDOOR AIR 2017; 27:551-563. [PMID: 27662430 DOI: 10.1111/ina.12341] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 09/14/2016] [Indexed: 06/06/2023]
Abstract
We investigated the physicochemical properties (size, shape, elemental composition, and endotoxin) of size resolved particulate matter (PM) collected from the indoor and corridor environments of classrooms. A comparative hazard profiling of these PM was conducted using human microvascular endothelial cells (HMVEC). Oxidative stress-dependent cytotoxicity responses were assessed using quantitative reverse transcriptase polymerase chain reaction (RT-PCR) and high content screening (HCS), and disruption of monolayer cell integrity was assessed using fluorescence microscopy and transwell assay. Scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX) analysis showed differences in the morphology and elemental composition of PM of different sizes and origins. While the total mass of PM collected from indoor environment was lower in comparison with those collected from the corridor, the endotoxin content was substantially higher in indoor PM (e.g., ninefold higher endotoxin level in indoor PM8.1-20 ). The ability to induce oxidative stress-mediated cytotoxicity and leakiness in cell monolayer were higher for indoor PM compared to those collected from the corridor. In conclusion, this comparative analysis suggested that indoor PM is relatively more hazardous to the endothelial system possibly because of higher endotoxin content.
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Affiliation(s)
- M L Chua
- Centre for Sustainable Nanotechnology, School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore City, Singapore
| | - M I Setyawati
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore City, Singapore
| | - H Li
- Centre for Sustainable Nanotechnology, School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore City, Singapore
| | - C H Y Fang
- Centre for Sustainable Nanotechnology, School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore City, Singapore
| | - S Gurusamy
- Centre for Sustainable Nanotechnology, School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore City, Singapore
| | - F T L Teoh
- Centre for Sustainable Nanotechnology, School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore City, Singapore
| | - D T Leong
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore City, Singapore
| | - S George
- Centre for Sustainable Nanotechnology, School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore City, Singapore
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83
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Aammi S, Karaca F, Petek M. A toxicological and genotoxicological indexing study of ambient aerosols (PM 2.5-10) using in vitro bioassays. CHEMOSPHERE 2017; 174:490-498. [PMID: 28189894 DOI: 10.1016/j.chemosphere.2017.01.141] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 01/22/2017] [Accepted: 01/28/2017] [Indexed: 06/06/2023]
Abstract
This study evaluates the toxicity and genotoxicity levels of atmospheric particulate matter (PM) samples collected at several locations of a megacity (Istanbul, Turkey) with different urban and industrial characteristics. The ambient air samples, in the form of a coarse fraction of inhalable particulates, PM2.5-10, were collected on Teflon filters using a passive sampling method on a monthly basis during a one-year period. Later, they were extracted into both the lipophilic and hydrophilic phases using dimethyl sulfoxide (DMSO) and ultra-pure water, respectively. The obtained aqueous extracts were tested for acute toxicity and genotoxicity using the photo-luminescent bacterium Vibrio fischeri Microtox® and SOS Chromotest® assays, respectively. Statistically significant differences greater than background levels were obtained in both measurements, indicating the presence of toxic substances absorbed on particulate matter. The PM2.5-10 extracts identified significant seasonal and locational differences in the toxicity and genotoxicity levels. Local anthropogenic activities and factors were associated with the quantified higher levels. Finally, a qualitative inner comparison study of regional toxicity and genotoxicity indexes was suggested to provide a clearer picture of the pollution and risk levels (or occurrences) in the Istanbul urban area. In this indexing study, the threshold levels for the urban background and episodic occurrences of the toxicity and genotoxicity levels in PM2.5-10 samples were identified to be 1.11 TU (Toxicity Unit) and 8.73 TU and 0.72 IF (Induction Factor) and 1.38 IF, respectively.
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Affiliation(s)
- Saida Aammi
- Istanbul University, Biotechnology Department, Beyazit, 34452, Fatih, Istanbul, Turkey.
| | - Ferhat Karaca
- Nazarbayev University, Civil Engineering Department, 010000, Astana, Kazakhstan
| | - Mustafa Petek
- Fatih University, Department of Genetic and Biomedical Engineering, 34500, Buyukcekmece, Istanbul, Turkey
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84
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Manigrasso M, Buonanno G, Fuoco FC, Stabile L, Avino P. Electronic cigarettes: age-specific generation-resolved pulmonary doses. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:13068-13079. [PMID: 28382447 DOI: 10.1007/s11356-017-8914-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 03/22/2017] [Indexed: 06/07/2023]
Abstract
Particle size-number distributions of aerosol from e-cigarettes (0 and 14 mg mL-1 nicotine) were compared with conventional cigarettes. Results were used to provide age-specific (9-21 years) dosimetry estimates applying the MMPD model. After a 2-s puff, total number doses (D Tot ) were highest for 9 years of age (6.01 × 1010-1.31 × 1011 particles) and lowest for 18 years of age (4.69 × 1010-1.06 × 1011 particles). Such doses represented about 19-45 and 25-100% of the relevant daily doses of not smoking individuals, respectively, in tracheobronchial (TB) and alveolar (A) regions. D Tot for the e-cigarettes were about double that for conventional cigarette. Deposition densities and daily volume of e-cigarette liquid deposited per unit surface area were maximum at lobar bronchi, highest for 9 years and lowest for 21 years age.
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Affiliation(s)
- Maurizio Manigrasso
- DIT, INAIL Settore Ricerca, Certificazione e Verifica, via R. Ferruzzi 38/40, 00133, Rome, Italy
| | - Giorgio Buonanno
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via Di Biasio 43, 03043, Cassino, Italy
- Queensland University of Technology, Brisbane, Australia
| | - Fernanda Carmen Fuoco
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via Di Biasio 43, 03043, Cassino, Italy
| | - Luca Stabile
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via Di Biasio 43, 03043, Cassino, Italy
| | - Pasquale Avino
- DIT, INAIL Settore Ricerca, Certificazione e Verifica, via R. Ferruzzi 38/40, 00133, Rome, Italy.
- Department of Agriculture, Environment and Food, University of Molise, via De Sanctis, 86100, Campobasso, Italy.
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85
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Hou H, Yu Y, Shen Z, Liu S, Wu B. Hepatic transcriptomic responses in mice exposed to arsenic and different fat diet. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:10621-10629. [PMID: 28283972 DOI: 10.1007/s11356-017-8743-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 03/01/2017] [Indexed: 06/06/2023]
Abstract
Chronic exposure to inorganic arsenic (iAs) or a high-fat diet (HFD) can produce liver injury. However, effects of HFD on risk assessment of iAs in drinking water are unclear. In this study, we examined how HFD and iAs interact to alter iAs-induced liver injury in C57BL/6 mice. Mice fed low-fat diet (LFD) or HFD were exposed to 3 mg/L iAs or deionized water for 10 weeks. Results showed that HFD changed intake and excretion of iAs by mice. Then, HFD increased the amount of iAs-induced hepatic DNA damage and amplified changes in pathways related to cell death and growth, signal transduction, lipid metabolism, and insulin signaling. Compared to gene expression profiles caused by iAs alone or HFD alone, insulin signaling pathway might play important roles in the interactive effects of iAs and HFD. Our data suggest that HFD increases sensitivity of mice to iAs in drinking water, resulting in increased hepatotoxicity. This study highlight that HFD might enhance the risk of iAs hepatotoxicity in iAs-polluted regions. The diet should be considered during risk assessment of iAs in drinking water.
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Affiliation(s)
- Hui Hou
- State Key Laboratory of Pollutant Control and Resource Reuse, School of the Environment, Nanjing University, Xianlin Campus, 163 Xianlin Avenue, Nanjing, 210023, People's Republic of China
| | - Yue Yu
- State Key Laboratory of Pollutant Control and Resource Reuse, School of the Environment, Nanjing University, Xianlin Campus, 163 Xianlin Avenue, Nanjing, 210023, People's Republic of China
| | - Zhuoyan Shen
- State Key Laboratory of Pollutant Control and Resource Reuse, School of the Environment, Nanjing University, Xianlin Campus, 163 Xianlin Avenue, Nanjing, 210023, People's Republic of China
| | - Su Liu
- State Key Laboratory of Pollutant Control and Resource Reuse, School of the Environment, Nanjing University, Xianlin Campus, 163 Xianlin Avenue, Nanjing, 210023, People's Republic of China
| | - Bing Wu
- State Key Laboratory of Pollutant Control and Resource Reuse, School of the Environment, Nanjing University, Xianlin Campus, 163 Xianlin Avenue, Nanjing, 210023, People's Republic of China.
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86
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de Rooij MMT, Heederik DJJ, Borlée F, Hoek G, Wouters IM. Spatial and temporal variation in endotoxin and PM10 concentrations in ambient air in a livestock dense area. ENVIRONMENTAL RESEARCH 2017; 153:161-170. [PMID: 27984760 DOI: 10.1016/j.envres.2016.12.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 12/02/2016] [Accepted: 12/03/2016] [Indexed: 05/19/2023]
Abstract
Several studies have reported associations between farming and respiratory health in neighboring residents. Health effects are possibly linked to fine dust and endotoxin emissions from livestock farms. Little is known about levels of these air pollutants in ambient air in livestock dense areas. We aimed to explore temporal and spatial variation of PM10 and endotoxin concentrations, and the association with livestock-related spatial and meteorological temporal determinants. From March till September 2011, one week average PM10 samples were collected using Harvard Impactors at eight sites (residential gardens) representing a variety of nearby livestock-related characteristics. A background site was included in the study area, situated at least 500m away from the nearest farm. PM10 mass was determined by gravimetric analysis and endotoxin level by means of Limulus-Amebocyte-Lysate assay. Data were analyzed using mixed models. The range between sites of geometric mean concentrations was for PM10 19.8-22.3µg/m3 and for endotoxin 0.46-0.66EU/m3. PM10 concentrations and spatial variation were very similar for all sites, while endotoxin concentrations displayed a more variable pattern over time with larger differences between sites. Nonetheless, the temporal pattern at the background location was highly comparable to the sites mean temporal pattern both for PM10 and endotoxin (Pearson correlation: 0.92, 0.62). Spatial variation was larger for endotoxin than for PM10 (within/between site variance ratio: 0.63, 2.03). Spatial livestock-related characteristics of the surroundings were more strongly related to endotoxin concentrations, while temporal determinants were more strongly related to PM10 concentrations. The effect of local livestock-related sources on PM10 concentration was limited in this study carried out in a livestock dense area. The effect on endotoxin concentrations was more profound. To gain more insight in the effect of livestock-related sources on ambient levels of PM10 and endotoxin, measurements should be based on a broader set of locations.
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Affiliation(s)
- Myrna M T de Rooij
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, The Netherlands.
| | - Dick J J Heederik
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, The Netherlands
| | - Floor Borlée
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, The Netherlands
| | - Gerard Hoek
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, The Netherlands
| | - Inge M Wouters
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, The Netherlands
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87
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Teoldi F, Lodi M, Benfenati E, Colombo A, Baderna D. Air quality in the Olona Valley and in vitro human health effects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 579:1929-1939. [PMID: 27939080 DOI: 10.1016/j.scitotenv.2016.11.203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 11/14/2016] [Accepted: 11/28/2016] [Indexed: 06/06/2023]
Abstract
Air quality is a major point in current health policies in force globally to protect human health and ecosystems. Cardiovascular and lung diseases are the pathologies most commonly associated with air pollution and it has been estimated that exposure to particulate matters and ground-level ozone and nitric oxides caused >500.000 premature deaths in Europe. Although air quality was generally improved in the recent years, further efforts are required to reduce the impact of air pollution on humans. The present study applied a multidisciplinary approach to estimate the adverse effects on the health of the inhabitants of the Olona Valley in the north of Italy. Chemical analyses quantified the air levels of metals, dioxins, PCBs, PAHs and some macropollutants, including total, fine and coarse airborne particles. These results were used as input for the health risk assessment and in vitro bioassays were used to evaluate possible adverse effects on the respiratory tract due to the organic pollutants adsorbed on the airborne particulate matter. Critical alerts were identified from the air characterization and from the chemical-based risk assessment in view of the levels of arsenic, nickel, benzene, fine and coarse particulate matters found in the investigated zone, which can induce severe adverse effects on human health. These findings were confirmed by bioassays with A549 and BEAS-2B cells. We also used the cell transformation assay with BALB/c 3T3 cells to assess the carcinogenicity of the organic extracts of collected particles as an innovative tool to establish the possible chronic effects of inhaled pollutants. No significant changes in morphological transformation were found suggesting that, although the extracts contain compounds with proven carcinogenic potential, in our experimental conditions the levels of these pollutants were too low to induce carcinogenesis as resulted also by the chemical-based risk assessment.
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Affiliation(s)
- Federico Teoldi
- Laboratory of Environmental Chemistry and Toxicology, IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Via Giuseppe La Masa 19, 20156 Milan, Italy
| | - Marco Lodi
- Laboratory of Environmental Chemistry and Toxicology, IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Via Giuseppe La Masa 19, 20156 Milan, Italy
| | - Emilio Benfenati
- Laboratory of Environmental Chemistry and Toxicology, IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Via Giuseppe La Masa 19, 20156 Milan, Italy
| | - Andrea Colombo
- Laboratory of Environmental Chemistry and Toxicology, IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Via Giuseppe La Masa 19, 20156 Milan, Italy
| | - Diego Baderna
- Laboratory of Environmental Chemistry and Toxicology, IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Via Giuseppe La Masa 19, 20156 Milan, Italy.
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88
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Shi J, Lin Z, Chen R, Wang C, Yang C, Cai J, Lin J, Xu X, Ross JA, Zhao Z, Kan H. Cardiovascular Benefits of Wearing Particulate-Filtering Respirators: A Randomized Crossover Trial. ENVIRONMENTAL HEALTH PERSPECTIVES 2017; 125:175-180. [PMID: 27562361 PMCID: PMC5289918 DOI: 10.1289/ehp73] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 07/12/2016] [Accepted: 07/26/2016] [Indexed: 05/21/2023]
Abstract
BACKGROUND Practical approaches to protect individuals from ambient particulate matter (PM) are urgently needed in developing countries. Evidence on the health benefits of wearing particulate-filtering respirators is limited. OBJECTIVES We evaluated the short-term cardiovascular health effects of wearing respirators in China. METHODS A randomized crossover trial was performed in 24 healthy young adults in Shanghai, China in 2014. The subjects were randomized into two groups and wore particulate-filtering respirators for 48 hr alternating with a 3-week washout interval. Heart rate variability (HRV) and ambulatory blood pressure (BP) were continuously monitored during the 2nd 24 hr in each intervention. Circulating biomarkers were measured at the end of each intervention. Linear mixed-effect models were applied to evaluate the effects of wearing respirators on health outcomes. RESULTS During the intervention periods, the mean daily average concentration of PM with an aerodynamic diameter < 2.5 μm (PM2.5) was 74.2 μg/m3. Compared with the absence of respirators, wearing respirators was associated with a decrease of 2.7 mmHg [95% confidence interval (CI): 0.1, 5.2 mmHg] in systolic BP and increases of HRV parameters, including 12.5% (95% CI: 3.8%, 21.2%) in high frequency (HF) power, 10.9% (95% CI: 1.8%, 20.0%) in the root mean square of the successive differences, and 22.1% (95% CI: 3.6%, 40.7%) in the percentage of normal RR intervals with duration > 50 msec different from the previous normal RR interval (pNN50). The presence of respirators was also associated with a decrease of 7.8% (95% CI: 3.5%, 12.1%) in the ratio of low frequency (LF)/HF power. CONCLUSIONS Short-term wearing of particulate-filtering respirators may produce cardiovascular benefits by improving autonomic nervous function and reducing BP. Citation: Shi J, Lin Z, Chen R, Wang C, Yang C, Cai J, Lin J, Xu X, Ross JA, Zhao Z, Kan H. 2017. Cardiovascular benefits of wearing particulate-filtering respirators: a randomized crossover trial. Environ Health Perspect 125:175-180; http://dx.doi.org/10.1289/EHP73.
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Affiliation(s)
- Jingjin Shi
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of Health,
| | - Zhijing Lin
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of Health,
| | - Renjie Chen
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of Health,
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP), and
| | - Cuicui Wang
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of Health,
| | - Changyuan Yang
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of Health,
| | - Jing Cai
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of Health,
| | - Jingyu Lin
- Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xiaohui Xu
- Department of Epidemiology and Biostatistics, and
| | - Jennifer A. Ross
- Department of Public Health Studies, Texas A&M School of Public Health, College Station, Texas, USA
| | - Zhuohui Zhao
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of Health,
- Address correspondence to H. Kan, Department of Environmental Health, School of Public Health, Fudan University, P.O. Box 249, 130 Dong-An Rd., Shanghai 200032, China. Telephone: 86 (21) 5423 7908. E-mail: , or Z. Zhao, Department of Environmental Health, School of Public Health, Fudan University, P.O. Box 249, 130 Dong-An Rd., Shanghai 200032, China. Telephone: 86 (21) 5423 7908. E-mail:
| | - Haidong Kan
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of Health,
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP), and
- Address correspondence to H. Kan, Department of Environmental Health, School of Public Health, Fudan University, P.O. Box 249, 130 Dong-An Rd., Shanghai 200032, China. Telephone: 86 (21) 5423 7908. E-mail: , or Z. Zhao, Department of Environmental Health, School of Public Health, Fudan University, P.O. Box 249, 130 Dong-An Rd., Shanghai 200032, China. Telephone: 86 (21) 5423 7908. E-mail:
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90
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Watanabe M, Noma H, Kurai J, Sano H, Hantan D, Ueki M, Kitano H, Shimizu E. A panel study of airborne particulate matter composition versus concentration: Potential for inflammatory response and impaired pulmonary function in children. Allergol Int 2017; 66:52-58. [PMID: 27262618 DOI: 10.1016/j.alit.2016.04.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 03/29/2016] [Accepted: 04/24/2016] [Indexed: 10/21/2022] Open
Abstract
BACKGROUND The relationship between airborne particulate matter (PM) and pulmonary function in children has not been consistent among studies, potentially owing to differences in the inflammatory response to PM, based on PM types and sources. The objective of this study was to investigate the effect of airborne PM on pulmonary function in schoolchildren and its potential for an inflammatory response. METHODS Daily morning peak expiratory flow (PEF) was measured in 339 schoolchildren in February 2015. Interleukin (IL)-8 production was assessed in THP1 cells stimulated by airborne PM collected every day during the study period, and these IL-8 concentrations are described as the daily IL-8 levels. A linear mixed model was used to estimate the association between PEF values and the daily levels of suspended PM (SPM), PM diameters smaller than 2.5 μm (PM2.5), and IL-8. RESULTS The daily IL-8 levels were significantly associated with those of SPM and PM2.5. A 0.83 μg/mL increase in IL-8 levels was significantly associated with a -1.07 L/min (95% confidence interval, -2.05 to -0.08) decrease in PEF. A 12.0 μg/m3 increase in SPM and a 10.0 μg/m3 increase in PM2.5 were associated with a -1.36 L/min (-2.93 to 0.22) and -1.72 L/min (-3.82 to 0.36) decreases in PEF, respectively. There were no significant relationships between PEF, SPM, and PM2.5. CONCLUSIONS These findings suggest that the effects of airborne PM on pulmonary function in schoolchildren might depend more on the pro-inflammatory response than the mass concentration of the PM.
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91
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Kastury F, Smith E, Juhasz AL. A critical review of approaches and limitations of inhalation bioavailability and bioaccessibility of metal(loid)s from ambient particulate matter or dust. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 574:1054-1074. [PMID: 27672736 DOI: 10.1016/j.scitotenv.2016.09.056] [Citation(s) in RCA: 139] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 09/06/2016] [Accepted: 09/08/2016] [Indexed: 05/04/2023]
Abstract
Inhalation of metal(loid)s in ambient particulate matter (APM) represents a significant exposure pathway to humans. Although exposure assessment associated with this pathway is currently based on total metal(loid) content, a bioavailability (i.e. absorption in the systemic circulation) and/or bioaccessibility (i.e. solubility in simulated lung fluid) based approach may more accurately quantify exposure. Metal(loid) bioavailability-bioaccessibility assessment from APM is inherently complex and lacks consensus. This paper reviews the discrepancies that impede the adoption of a universal protocol for the assessment of inhalation bioaccessibility. Exposure assessment approaches for in-vivo bioavailability, in-vitro cell culture and in-vitro bioaccessibility (composition of simulated lungs fluid, physico-chemical and methodological considerations) are critiqued in the context of inhalation exposure refinement. An important limitation of bioavailability and bioaccessibility studies is the use of considerably higher than environmental metal(loid) concentration, which diminishing their relevance to human exposure scenarios. Similarly, individual metal(loid) studies have been criticised due to complexities of APM metal(loid) mixtures which may impart synergistic or antagonistic effects compared to single metal(loid) exposure. Although a number of different simulated lung fluid (SLF) compositions have been used in metal(loid) bioaccessibility studies, information regarding the comparative leaching efficiency among these different SLF and comparisons to in-vivo bioavailability data is lacking. In addition, the particle size utilised is often not representative of what is deposited in the lungs while assay parameters (extraction time, solid to liquid ratio, temperature and agitation) are often not biologically relevant. Research needs are identified in order to develop robust in-vitro bioaccessibility protocols for the assessment or prediction of metal(loid) bioavailability in APM for the refinement of inhalation exposure.
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Affiliation(s)
- Farzana Kastury
- Future Industries Institute, University of South Australia, Mawson Lakes Campus, Adelaide, SA 5095, Australia.
| | - Euan Smith
- Future Industries Institute, University of South Australia, Mawson Lakes Campus, Adelaide, SA 5095, Australia
| | - Albert L Juhasz
- Future Industries Institute, University of South Australia, Mawson Lakes Campus, Adelaide, SA 5095, Australia
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Corsini E, Ozgen S, Papale A, Galbiati V, Lonati G, Fermo P, Corbella L, Valli G, Bernardoni V, Dell’Acqua M, Becagli S, Caruso D, Vecchi R, Galli CL, Marinovich M. Insights on wood combustion generated proinflammatory ultrafine particles (UFP). Toxicol Lett 2017; 266:74-84. [DOI: 10.1016/j.toxlet.2016.12.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 12/07/2016] [Accepted: 12/07/2016] [Indexed: 01/17/2023]
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93
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He M, Ichinose T, Yoshida S, Shiba F, Arashidani K, Takano H, Sun G, Shibamoto T. Differences in allergic inflammatory responses in murine lungs: comparison of PM2.5 and coarse PM collected during the hazy events in a Chinese city. Inhal Toxicol 2016; 28:706-718. [PMID: 27919164 DOI: 10.1080/08958378.2016.1260185] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Urban particulate matter (PM) is associated with an increase in asthma. PM2.5 (<PM2.5 μm) and coarse PM (CPM: PM2.5-PM10 μm) were collected from the air in a Chinese city during haze events. The amounts of polycyclic aromatic hydrocarbons (PAHs) were higher in PM2.5 than in CPM. Conversely, microbial elements LPS and β-glucan were much higher in CPM than in PM2.5. Concentrations of Si, Al, Fe, and Ti in CPM were greater than in PM2.5, while Pb, Cu and As concentrations were lower than in PM2.5. When RAW264.7 cells were treated with PM2.5 and CPM, the pro-inflammatory response in the cells was associated with the microbial element levels and attenuated partly by both polymyxin B (PMB) and N-acetylcystein (NAC). The expression of the oxidative stress response gene heme oxygenase1 was associated with PAHs levels. The exacerbating effects of the two-types of PM on murine lung eosinophilia were compared to clarify the role of toxic materials. When BALB/c mice were intratracheally instilled with PM2.5 or CPM (total 0.4 mg) + ovalbumin (OVA), both exacerbated lung eosinophilia along with allergy-relevant biological indicators, such as OVA-specific IgE in serum; enhancement of lung pathology when compared with counterpart samples without OVA. The exacerbating effects were greater in microbial element-rich CPM than in organic chemical-rich PM2.5. These results indicate that microbial elements have more potently exacerbating effects on the development of lung eosinophilia than do organic chemicals. In addition, oxidative stress and transition metals might be associated with the exacerbation of this negative effect.
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Affiliation(s)
- Miao He
- a School of Public Health, China Medical University , Shenyang , China.,b Department of Health Sciences , Oita University of Nursing and Health Sciences , Oita , Japan
| | - Takamichi Ichinose
- b Department of Health Sciences , Oita University of Nursing and Health Sciences , Oita , Japan
| | - Seiichi Yoshida
- b Department of Health Sciences , Oita University of Nursing and Health Sciences , Oita , Japan
| | - Fumiko Shiba
- b Department of Health Sciences , Oita University of Nursing and Health Sciences , Oita , Japan
| | - Keiichi Arashidani
- c Department of Immunology and Parasitology , School of Medicine, University of Occupational and Environmental Health , Fukuoka , Japan
| | - Hirohisa Takano
- d Environmental Health Division, Department of Environmental Engineering, Graduate School of Engineering, Kyoto University , Kyoto , Japan , and
| | - Guifan Sun
- a School of Public Health, China Medical University , Shenyang , China
| | - Takayuki Shibamoto
- e Department of Environmental Toxicology , University of California , Davis , CA , USA
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Thomson EM, Breznan D, Karthikeyan S, MacKinnon-Roy C, Vuong NQ, Dabek-Zlotorzynska E, Celo V, Charland JP, Kumarathasan P, Brook JR, Vincent R. Contrasting biological potency of particulate matter collected at sites impacted by distinct industrial sources. Part Fibre Toxicol 2016; 13:65. [PMID: 27906031 PMCID: PMC5134226 DOI: 10.1186/s12989-016-0176-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 11/23/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Industrial sources contribute a significant proportion of anthropogenic particulate matter (PM) emissions, producing particles of varying composition that may differentially impact health. This study investigated the in vitro toxicity of ambient PM collected near industrial sites in relation to particle size and composition. METHODS Size-fractionated particles (ultrafine, PM0.1-2.5, PM2.5-10, PM>10) were collected in the vicinity of steel, copper, aluminium, and petrochemical industrial sites. Human lung epithelial-like A549 and murine macrophage-like J774A.1 cells were exposed for 24 h to particle suspensions (0, 30, 100, 300 μg/cm2). Particle potency was assessed using cytotoxic (resazurin reduction, lactate dehydrogenase (LDH) release) and inflammatory (cytokine release) assays, and regressed against composition (metals, polycyclic aromatic hydrocarbons (PAHs), endotoxin). RESULTS Coarse (PM2.5-10, PM>10) particle fractions were composed primarily of iron and aluminium; in contrast, ultrafine and fine (PM0.1-2.5) fractions displayed considerable variability in metal composition (especially water-soluble metals) across collection sites consistent with source contributions. Semi-volatile and PM-associated PAHs were enriched in the fine and coarse fractions collected near metal industry. Cell responses to exposure at equivalent mass concentrations displayed striking differences among sites (SITE x SIZE and SITE x DOSE interactions, p < 0.05), suggesting that particle composition, in addition to size, impacted particle toxicity. While both J774A.1 and A549 cells exhibited clear particle size-dependent effects, site-dependent differences were more pronounced in J774A.1 cells, suggesting greater sensitivity to particle composition. Plotting particle potency according to cytotoxic and inflammatory response grouped particles by size and site, and showed that particles of similar composition tended to cluster together. Cytotoxic effects in J774A.1 cells correlated with metal and PAH content, while inflammatory responses were associated primarily with endotoxin content in coarse particles. CONCLUSIONS Industrial sources produce particulate emissions with varying chemical composition that differ in their in vitro potency in relation to particle size and the levels of specific constituents.
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Affiliation(s)
- Errol M Thomson
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, K1A 0K9, Canada.
| | - Dalibor Breznan
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, K1A 0K9, Canada
| | - Subramanian Karthikeyan
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, K1A 0K9, Canada
| | - Christine MacKinnon-Roy
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, K1A 0K9, Canada
| | - Ngoc Q Vuong
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, K1A 0K9, Canada
| | - Ewa Dabek-Zlotorzynska
- Analysis and Air Quality Section, Air Quality Research Division, Atmospheric Science and Technology Directorate, Environment and Climate Change Canada, Ottawa, ON, K1A 0H3, Canada
| | - Valbona Celo
- Analysis and Air Quality Section, Air Quality Research Division, Atmospheric Science and Technology Directorate, Environment and Climate Change Canada, Ottawa, ON, K1A 0H3, Canada
| | - Jean-Pierre Charland
- Analysis and Air Quality Section, Air Quality Research Division, Atmospheric Science and Technology Directorate, Environment and Climate Change Canada, Ottawa, ON, K1A 0H3, Canada
| | - Prem Kumarathasan
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, K1A 0K9, Canada
| | - Jeffrey R Brook
- Air Quality Processes Research Section, Air Quality Research Division, Atmospheric Science and Technology Directorate, Environment and Climate Change Canada, Toronto, ON, M3H 5T4, Canada
| | - Renaud Vincent
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Ontario, K1A 0K9, Canada.
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95
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Sturm R. Local lung deposition of ultrafine particles in healthy adults: experimental results and theoretical predictions. ANNALS OF TRANSLATIONAL MEDICINE 2016; 4:420. [PMID: 27942511 DOI: 10.21037/atm.2016.11.13] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Ultrafine particles (UFP) of biogenic and anthropogenic origin occur in high numbers in the ambient atmosphere. In addition, aerosols containing ultrafine powders are used for the inhalation therapy of various diseases. All these facts make it necessary to obtain comprehensive knowledge regarding the exact behavior of UFP in the respiratory tract. METHODS Theoretical simulations of local UFP deposition are based on previously conducted inhalation experiments, where particles with various sizes (0.04, 0.06, 0.08, and 0.10 µm) were administered to the respiratory tract by application of the aerosol bolus technique. By the sequential change of the lung penetration depth of the inspired bolus, different volumetric lung regions could be generated and particle deposition in these regions could be evaluated. The model presented in this contribution adopted all parameters used in the experiments. Besides the obligatory comparison between practical and theoretical data, also advanced modeling predictions including the effect of varying functional residual capacity (FRC) and respiratory flow rate were conducted. RESULTS Validation of the UFP deposition model shows that highest deposition fractions occur in those volumetric lung regions corresponding to the small and partly alveolated airways of the tracheobronchial tree. Particle deposition proximal to the trachea is increased in female probands with respect to male subjects. Decrease of both the FRC and the respiratory flow rate results in an enhancement of UFP deposition. CONCLUSIONS The study comes to the conclusion that deposition of UFP taken up via bolus inhalation is influenced by a multitude of factors, among which lung morphometry and breathing conditions play a superior role.
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Affiliation(s)
- Robert Sturm
- Department of Materials Science and Physics, Division of Physics and Biophysics, University of Salzburg, Salzburg, Austria
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96
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Kilburg-Basnyat B, Peters TM, Perry SS, Thorne PS. Electrostatic dust collectors compared to inhalable samplers for measuring endotoxin concentrations in farm homes. INDOOR AIR 2016; 26:724-33. [PMID: 26296624 PMCID: PMC4850132 DOI: 10.1111/ina.12243] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 08/17/2015] [Indexed: 05/02/2023]
Abstract
Paired electrostatic dust collectors (EDCs) and daily, inhalable button samplers (BS) were used concurrently to sample endotoxin in 10 farm homes during 7-day periods in summer and winter. Winter sampling included an optical particle counter (OPC) to measure PM2.5 and PM2.5-10 . Electrostatic dust collectors and BS filters were analyzed for endotoxin using the kinetic chromogenic Limulus amebocyte lysate assay. Optical particle counter particulate matter (PM) data were divided into two PM categories. In summer, geometric mean (geometric standard deviation) endotoxin concentrations were 0.82 EU/m(3) (2.7) measured with the BS and 737 EU/m(2) (1.9) measured with the EDC. Winter values were 0.52 EU/m(3) (3.1) for BS and 538 EU/m(2) (3.0) for EDCs. Seven-day endotoxin values of EDCs were highly correlated with the 7-day BS sampling averages (r = 0.70; P < 0.001). Analysis of variance indicated a 2.4-fold increase in EDC endotoxin concentrations for each unit increase of the ratio of PM2.5 to PM2.5-10 . There was also a significant correlation between BS and EDCs endotoxin concentrations for winter (r = 0.67; P < 0.05) and summer (r = 0.75; P < 0.05). Thus, EDCs sample comparable endotoxin concentrations to BS, making EDCs a feasible, easy to use alternative to BS for endotoxin sampling.
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Affiliation(s)
- B Kilburg-Basnyat
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA, USA
| | - T M Peters
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA, USA
| | - S S Perry
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA, USA
| | - P S Thorne
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA, USA.
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97
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Sonmez E, Cacciatore I, Bakan F, Turkez H, Mohtar YI, Togar B, Stefano AD. Toxicity assessment of hydroxyapatite nanoparticles in rat liver cell model in vitro. Hum Exp Toxicol 2016; 35:1073-83. [DOI: 10.1177/0960327115619770] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Hydroxyapatite nanoparticles (HAP NPs) are widely used for preparations of biomedical and biotechnological fields such as drug delivery, gene therapy, and molecular imaging. However, the current toxicological knowledge about HAP NPs is relatively limited. The present study was designed to investigate the toxicity potentials of various concentrations (0–1000 µg cm−2) of HAP NPs in cultured primary rat hepatocytes. Cell viability was detected by 3-(4,5-dimethyl-thiazol-2-yl) 2,5-diphenyltetrazolium bromide (MTT) assay and lactate dehydrogenase (LDH) release, while total antioxidant capacity (TAC) and total oxidative stress (TOS) levels were determined to evaluate the oxidative injury. The DNA damage was also analyzed via scoring liver micronuclei rates and determining 8-oxo-2-deoxyguanosine (8-OH-dG) levels. The results of MTT and LDH assays showed that the higher concentrations of dispersed HAP NPs (300, 500, and 1000 µg cm−2) decreased cell viability. Also, HAP NPs increased TOS (500 and 1000 µg cm−2) levels and decreased TAC (300, 500, and 1000 µg cm−2) levels in cultured hepatocytes. On the basis of increasing doses, the NPs as depending on dose caused significant increases of the number of micronucleated hepatocytes and 8-OH-dG levels as compared to control culture. Furthermore, the highest concentration of HAP NPs (1000 µg cm−2) exhibited cytotoxic activity. Based on these results, HAP NPs have a dose-dependent toxic effect in rat hepatocytes. Further extensive research in this field is promising and reasonable.
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Affiliation(s)
- E Sonmez
- Department of Physics, Faculty of K. K. Education, Atatürk University, Erzurum, Turkey
- Advanced Materials Research Laboratory, Department of Nanoscience and Nanoengineering, Graduate School of Natural and Applied Sciences, Atatürk University, Erzurum, Turkey
| | - I Cacciatore
- Department of Pharmacology, G. D’Annunzio University, Chieti, Italy
| | - F Bakan
- SUNUM, Sabanci University, Tuzla, Istanbul, Turkey
| | - H Turkez
- Department of Pharmacology, G. D’Annunzio University, Chieti, Italy
- Department of Molecular Biology and Genetics, Faculty of Science, Erzurum Technical University, Erzurum, Turkey
| | - YI Mohtar
- Department of Environmental Studies, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - B Togar
- Department of Biology, Faculty of Science, Atatürk University, Erzurum, Turkey
| | - AD Stefano
- Department of Pharmacology, G. D’Annunzio University, Chieti, Italy
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98
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Sturm R. Total deposition of ultrafine particles in the lungs of healthy men and women: experimental and theoretical results. ANNALS OF TRANSLATIONAL MEDICINE 2016; 4:234. [PMID: 27429960 DOI: 10.21037/atm.2016.06.05] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Inhaled ultrafine particles (UFP) may induce greater adverse respiratory effects than larger particles occurring in the ambient atmosphere. Due to this potential of UFP to act as triggers for diverse lung injuries medical as well as physical research has been increasingly focused on the exact deposition behavior of the particles in lungs of various probands. Main purpose of the present study was the presentation of experimental and theoretical data of total, regional, and local UFP deposition in the lungs of men and women. METHODS Both experiments and theoretical simulations were carried out by using particle sizes of 0.04, 0.06, 0.08, and 0.10 µm [number median diameters (NMD)]. Inhalation of UFP took place by application of predefined tidal volumes (500, 750, and 1,000 mL) and respiratory flow rates (150, 250, 375, and 500 mL·s(-1)). For male subjects a functional residual capacity (FRC) of 3,911±892 mL was measured, whereas female probands had a FRC of 3,314±547 mL. Theoretical predictions were based on (I) a stochastic model of the tracheobronchial tree; (II) particle transport computations according to a random walk algorithm; and (III) empirical formulae for the description of UFP deposition. RESULTS Total deposition fractions (TDF) are marked by a continuous diminution with increasing particle size. Whilst particles measuring 0.04 µm in size deposit in the respiratory tract by 40-70%, particles with a size of 0.10 µm exhibit deposition values ranging from 20% to 45%. Except for the largest particles studied here TDF of female probands are higher than those obtained for male probands. Differences between experimental and theoretical results are most significant for 0.10 µm particles, but never exceed 20%. Predictions of regional (extrathoracic, tracheobronchial, alveolar) UFP deposition show clearly that females tend to develop higher tracheobronchial and alveolar deposition fractions than males. This discrepancy is also confirmed by airway generation-specific deposition, which is permanently higher in women than in men. CONCLUSIONS From the experimental data and modeling predictions it can be concluded that females bear a slightly higher potential to develop lung insufficiencies after exposure to UFP than males. Besides higher deposition fractions occurring in female subjects, also total lung deposition dose is noticeably enhanced.
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Affiliation(s)
- Robert Sturm
- Department of Materials Science and Physics, Division of Physics and Biophysics, University of Salzburg, Salzburg, Austria
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99
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Schwarze PE, Ovrevik J, Låg M, Refsnes M, Nafstad P, Hetland RB, Dybing E. Particulate matter properties and health effects: consistency of epidemiological and toxicological studies. Hum Exp Toxicol 2016; 25:559-79. [PMID: 17165623 DOI: 10.1177/096032706072520] [Citation(s) in RCA: 252] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Identifying the ambient particulate matter (PM) fractions or constituents, critically involved in eliciting adverse health effects, is crucial to the implementation of more cost-efficient abatement strategies to improve air quality. This review focuses on the importance of different particle properties for PM-induced effects, and whether there is consistency in the results from epidemiological and experimental studies. An evident problem for such comparisons is that epidemiological and experimental data on the effects of specific components of ambient PM are limited. Despite this, some conclusions can be drawn. With respect to the importance of the PM size-fractions, experimental and epidemiological studies are somewhat conflicting, but there seems to be a certain consistency in that the coarse fraction (PM10-2.5) has an effect that should not be neglected. Better exposure characterization may improve the consistency between the results from experimental and epidemiological studies, in particular for ultrafine particles. Experimental data indicate that surface area is an important metric, but composition may play an even greater role in eliciting effects. The consistency between epidemiological and experimental findings for specific PM-components appears most convincing for metals, which seem to be important for the development of both pulmonary and cardiovascular disease. Metals may also be involved in PM-induced allergic sensitization, but the epidemiological evidence for this is scarce. Soluble organic compounds appear to be implicated in PM-induced allergy and cancer, but the data from epidemiological studies are insufficient for any conclusions. The present review suggests that there may be a need for improvements in research designs. In particular, there is a need for better exposure assessments in epidemiological investigations, whereas experimental data would benefit from an improved comparability of studies. Combined experimental and epidemiological investigations may also help answer some of the unresolved issues.
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Affiliation(s)
- P E Schwarze
- Norwegian Institute of Public Health, Oslo, Norway.
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100
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Cai Y, Zhang B, Ke W, Feng B, Lin H, Xiao J, Zeng W, Li X, Tao J, Yang Z, Ma W, Liu T. Associations of Short-Term and Long-Term Exposure to Ambient Air Pollutants With Hypertension. Hypertension 2016; 68:62-70. [DOI: 10.1161/hypertensionaha.116.07218] [Citation(s) in RCA: 188] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 04/05/2016] [Indexed: 01/01/2023]
Abstract
Hypertension is a major disease of burden worldwide. Previous studies have indicated that air pollution might be a risk factor for hypertension, but the results were controversial. To fill this gap, we performed a meta-analysis of epidemiological studies to investigate the associations of short-term and long-term exposure to ambient air pollutants with hypertension. We searched all of the studies published before September 1, 2015, on the associations of ozone (O
3
), carbon monoxide (CO), nitrogen oxide (NO
2
and NO
X
), sulfur dioxide (SO
2
), and particulate matter (PM
10
and PM
2.5
) with hypertension in the English electronic databases. A pooled odds ratio (OR) for hypertension in association with each 10 μg/m
3
increase in air pollutant was calculated by a random-effects model (for studies with significant heterogeneity) or a fixed-effect model (for studies without significant heterogeneity). A total of 17 studies examining the effects of short-term (n=6) and long-term exposure (n=11) to air pollutants were identified. Short-term exposure to SO
2
(OR=1.046, 95% confidence interval [CI]: 1.012–1.081), PM
2.5
(OR=1.069, 95% CI: 1.003–1.141), and PM
10
(OR=1.024, 95% CI: 1.016–1.032) were significantly associated with hypertension. Long-term exposure (a 10 μg/m
3
increase) to NO
2
(OR=1.034, 95% CI: 1.005–1.063) and PM
10
(OR=1.054, 95% CI: 1.036–1.072) had significant associations with hypertension. Exposure to other ambient air pollutants (short-term exposure to NO
2
, O
3
, and CO and long-term exposure to NO
x
, PM
2.5
, and SO
2
) also had positive relationships with hypertension, but lacked statistical significance. Our results suggest that short-term or long-term exposure to some air pollutants may increase the risk of hypertension.
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Affiliation(s)
- Yuanyuan Cai
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
| | - Bo Zhang
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
| | - Weixia Ke
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
| | - Baixiang Feng
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
| | - Hualiang Lin
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
| | - Jianpeng Xiao
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
| | - Weilin Zeng
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
| | - Xing Li
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
| | - Jun Tao
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
| | - Zuyao Yang
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
| | - Wenjun Ma
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
| | - Tao Liu
- From the Department of Preventive Medicine, School of Public Health, Sun Yat-Sen University, Guangzhou, China (Y.C., B.Z.); Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Guangzhou, China (Y.C., B.Z.); Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (W.K., B.F., H.L., J.X., W.Z., X.L., W.M., T.L.); South China Institute of Environmental Sciences, Ministry of Environmental Protection,
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