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Bouma F, Hoek G, Koppelman GH, Vonk JM, Kerckhoffs J, Vermeulen R, Gehring U. Exposure to ambient ultrafine particles and allergic sensitization in children up to 16 years. ENVIRONMENTAL RESEARCH 2023; 219:115102. [PMID: 36565840 DOI: 10.1016/j.envres.2022.115102] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 11/19/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Few epidemiological studies so far have investigated the role of long-term exposure to ultrafine particles (UFP) in inhalant and food allergy development. OBJECTIVES The purpose of this study was to assess the association between UFP exposure and allergic sensitization to inhalant and food allergens in children up to 16 years old in the Netherlands. METHODS 2295 participants of a prospective birth cohort with IgE measurements to common inhalant and food allergens at ages 4, 8, 12 and/or 16 were included in the study. Annual average UFP concentrations were estimated for the home addresses at birth and at the time of the IgE measurements using land-use regression models. Generalized estimating equations were used for the assessment of overall and age-specific associations between UFP exposure and allergic sensitization. Additionally, single- and two-pollutant models with NO2, PM2.5, PM2.5 absorbance and PM10 were assessed. RESULTS We found no significant associations between UFP exposure and allergic sensitization to inhalant and food allergens (OR (95% CI) ranging from 1.02 (0.95-1.10) to 1.05 (0.98-1.12), per IQR increment). NO2, PM2.5, PM2.5 absorbance and PM10 showed significant associations with sensitization to food allergens (OR (95% CI) ranging from 1.09 (1.00-1.20) to 1.23 (1.06-1.43) per IQR increment). NO2, PM2.5, PM2.5 absorbance and PM10 were not associated with sensitization to inhalant allergens. For NO2, PM2.5 and PM2.5 absorbance, the associations with sensitization to food allergens persisted in two-pollutant models with UFP. CONCLUSION This study found no association between annual average exposure to UFP and allergic sensitization in children up to 16 years of age. NO2, PM2.5, PM2.5 absorbance and PM10 were associated with sensitization to food allergens.
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Affiliation(s)
- Femke Bouma
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands.
| | - Gerard Hoek
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
| | - Gerard H Koppelman
- Department of Pediatric Pulmonology, Beatrix Children's Hospital, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands; Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Judith M Vonk
- Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, University Medical Center Groningen, Groningen, the Netherlands; Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Jules Kerckhoffs
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
| | - Roel Vermeulen
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands; Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Ulrike Gehring
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
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Candeias J, Zimmermann EJ, Bisig C, Gawlitta N, Oeder S, Gröger T, Zimmermann R, Schmidt-Weber CB, Buters J. The priming effect of diesel exhaust on native pollen exposure at the air-liquid interface. ENVIRONMENTAL RESEARCH 2022; 211:112968. [PMID: 35240115 DOI: 10.1016/j.envres.2022.112968] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 02/05/2022] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
UNLABELLED Pollen related allergic diseases have been increasing for decades. The reasons for this increase are unknown, but environmental pollution like diesel exhaust seem to play a role. While previous studies explored the effects of pollen extracts, we studied here for the first time priming effects of diesel exhaust on native pollen exposure using a novel experimental setup. METHODS Human bronchial epithelial BEAS-2B cells were exposed to native birch pollen (real life intact pollen, not pollen extracts) at the air-liquid interface (pollen-ALI). BEAS-2B cells were also pre-exposed in a diesel-ALI to diesel CAST for 2 h (a model for diesel exhaust) and then to pollen in the pollen-ALI 24 h later. Effects were analysed by genome wide transcriptome analysis after 2 h 25 min, 6 h 50 min and 24 h. Selected genes were confirmed by qRT-PCR. RESULTS Bronchial epithelial cells exposed to native pollen showed the highest transcriptomic changes after about 24 h. About 3157 genes were significantly up- or down-regulated for all time points combined. After pre-exposure to diesel exhaust the maximum reaction to pollen had shifted to about 2.5 h after exposure, plus the reaction to pollen was desensitised as only 560 genes were differentially regulated. Only 97 genes were affected synergistically. Of these, enrichment analysis showed that genes involved in immune and inflammatory response were involved. CONCLUSION Diesel exhaust seems to prime cells to react more rapidly to native pollen exposure, especially inflammation related genes, a factor known to facilitate the development of allergic sensitization. The marker genes here detected could guide studies in humans when investigating whether modern and outdoor diesel exhaust exposure is still detrimental for the development of allergic disease.
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Affiliation(s)
- Joana Candeias
- Center Allergy & Environment (ZAUM), Member of the German Center for Lung Research (DZL), Technical University Munich / Helmholtz Center Munich, Germany
| | - Elias J Zimmermann
- Joint Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics (CMA), Helmholtz Center Munich, Ingolstädter Landstraße 1, D-85764, Neuherberg, Germany; Joint Mass Spectrometry Center (JMSC) at Analytical Chemistry, Institute of Chemistry, University of Rostock, Dr. Lorenzweg 2, D-18051, Rostock, Germany
| | - Christoph Bisig
- Joint Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics (CMA), Helmholtz Center Munich, Ingolstädter Landstraße 1, D-85764, Neuherberg, Germany
| | - Nadine Gawlitta
- Joint Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics (CMA), Helmholtz Center Munich, Ingolstädter Landstraße 1, D-85764, Neuherberg, Germany; Joint Mass Spectrometry Center (JMSC) at Analytical Chemistry, Institute of Chemistry, University of Rostock, Dr. Lorenzweg 2, D-18051, Rostock, Germany
| | - Sebastian Oeder
- Joint Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics (CMA), Helmholtz Center Munich, Ingolstädter Landstraße 1, D-85764, Neuherberg, Germany
| | - Thomas Gröger
- Joint Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics (CMA), Helmholtz Center Munich, Ingolstädter Landstraße 1, D-85764, Neuherberg, Germany
| | - Ralf Zimmermann
- Joint Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics (CMA), Helmholtz Center Munich, Ingolstädter Landstraße 1, D-85764, Neuherberg, Germany; Joint Mass Spectrometry Center (JMSC) at Analytical Chemistry, Institute of Chemistry, University of Rostock, Dr. Lorenzweg 2, D-18051, Rostock, Germany
| | - Carsten B Schmidt-Weber
- Center Allergy & Environment (ZAUM), Member of the German Center for Lung Research (DZL), Technical University Munich / Helmholtz Center Munich, Germany
| | - Jeroen Buters
- Center Allergy & Environment (ZAUM), Member of the German Center for Lung Research (DZL), Technical University Munich / Helmholtz Center Munich, Germany.
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Doryab A, Taskin MB, Stahlhut P, Schröppel A, Orak S, Voss C, Ahluwalia A, Rehberg M, Hilgendorff A, Stöger T, Groll J, Schmid O. A Bioinspired in vitro Lung Model to Study Particokinetics of Nano-/Microparticles Under Cyclic Stretch and Air-Liquid Interface Conditions. Front Bioeng Biotechnol 2021; 9:616830. [PMID: 33634087 PMCID: PMC7902031 DOI: 10.3389/fbioe.2021.616830] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 01/13/2021] [Indexed: 12/12/2022] Open
Abstract
Evolution has endowed the lung with exceptional design providing a large surface area for gas exchange area (ca. 100 m2) in a relatively small tissue volume (ca. 6 L). This is possible due to a complex tissue architecture that has resulted in one of the most challenging organs to be recreated in the lab. The need for realistic and robust in vitro lung models becomes even more evident as causal therapies, especially for chronic respiratory diseases, are lacking. Here, we describe the Cyclic InVItroCell-stretch (CIVIC) “breathing” lung bioreactor for pulmonary epithelial cells at the air-liquid interface (ALI) experiencing cyclic stretch while monitoring stretch-related parameters (amplitude, frequency, and membrane elastic modulus) under real-time conditions. The previously described biomimetic copolymeric BETA membrane (5 μm thick, bioactive, porous, and elastic) was attempted to be improved for even more biomimetic permeability, elasticity (elastic modulus and stretchability), and bioactivity by changing its chemical composition. This biphasic membrane supports both the initial formation of a tight monolayer of pulmonary epithelial cells (A549 and 16HBE14o−) under submerged conditions and the subsequent cell-stretch experiments at the ALI without preconditioning of the membrane. The newly manufactured versions of the BETA membrane did not improve the characteristics of the previously determined optimum BETA membrane (9.35% PCL and 6.34% gelatin [w/v solvent]). Hence, the optimum BETA membrane was used to investigate quantitatively the role of physiologic cyclic mechanical stretch (10% linear stretch; 0.33 Hz: light exercise conditions) on size-dependent cellular uptake and transepithelial transport of nanoparticles (100 nm) and microparticles (1,000 nm) for alveolar epithelial cells (A549) under ALI conditions. Our results show that physiologic stretch enhances cellular uptake of 100 nm nanoparticles across the epithelial cell barrier, but the barrier becomes permeable for both nano- and micron-sized particles (100 and 1,000 nm). This suggests that currently used static in vitro assays may underestimate cellular uptake and transbarrier transport of nanoparticles in the lung.
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Affiliation(s)
- Ali Doryab
- Comprehensive Pneumology Center Munich, Member of the German Center for Lung Research, Munich, Germany.,Helmholtz Zentrum München-German Research Center for Environmental Health, Institute of Lung Biology and Disease, Munich, Germany
| | - Mehmet Berat Taskin
- Department of Functional Materials in Medicine and Dentistry, Bavarian Polymer Institute, University of Würzburg, Würzburg, Germany
| | - Philipp Stahlhut
- Department of Functional Materials in Medicine and Dentistry, Bavarian Polymer Institute, University of Würzburg, Würzburg, Germany
| | - Andreas Schröppel
- Comprehensive Pneumology Center Munich, Member of the German Center for Lung Research, Munich, Germany.,Helmholtz Zentrum München-German Research Center for Environmental Health, Institute of Lung Biology and Disease, Munich, Germany
| | - Sezer Orak
- Comprehensive Pneumology Center Munich, Member of the German Center for Lung Research, Munich, Germany.,Helmholtz Zentrum München-German Research Center for Environmental Health, Institute of Lung Biology and Disease, Munich, Germany
| | - Carola Voss
- Comprehensive Pneumology Center Munich, Member of the German Center for Lung Research, Munich, Germany.,Helmholtz Zentrum München-German Research Center for Environmental Health, Institute of Lung Biology and Disease, Munich, Germany
| | - Arti Ahluwalia
- Research Center "E. Piaggio", University of Pisa, Pisa, Italy.,Department of Information Engineering, University of Pisa, Pisa, Italy
| | - Markus Rehberg
- Comprehensive Pneumology Center Munich, Member of the German Center for Lung Research, Munich, Germany.,Helmholtz Zentrum München-German Research Center for Environmental Health, Institute of Lung Biology and Disease, Munich, Germany
| | - Anne Hilgendorff
- Comprehensive Pneumology Center Munich, Member of the German Center for Lung Research, Munich, Germany.,Helmholtz Zentrum München-German Research Center for Environmental Health, Institute of Lung Biology and Disease, Munich, Germany.,Center for Comprehensive Developmental Care (CDeCLMU), Dr. von Haunersches Children's Hospital University, Hospital of the Ludwig-Maximilians University, Munich, Germany
| | - Tobias Stöger
- Comprehensive Pneumology Center Munich, Member of the German Center for Lung Research, Munich, Germany.,Helmholtz Zentrum München-German Research Center for Environmental Health, Institute of Lung Biology and Disease, Munich, Germany
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry, Bavarian Polymer Institute, University of Würzburg, Würzburg, Germany
| | - Otmar Schmid
- Comprehensive Pneumology Center Munich, Member of the German Center for Lung Research, Munich, Germany.,Helmholtz Zentrum München-German Research Center for Environmental Health, Institute of Lung Biology and Disease, Munich, Germany
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Chatkin J, Correa L, Santos U. External Environmental Pollution as a Risk Factor for Asthma. Clin Rev Allergy Immunol 2021; 62:72-89. [PMID: 33433826 PMCID: PMC7801569 DOI: 10.1007/s12016-020-08830-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/21/2020] [Indexed: 12/12/2022]
Abstract
Air pollution is a worrisome risk factor for global morbidity and mortality and plays a special role in many respiratory conditions. It contributes to around 8 million deaths/year, with outdoor exposure being responsible for more than 4.2 million deaths throughout the world, while more than 3.8 million die from situations related to indoor pollution. Pollutant agents induce several respiratory symptoms. In addition, there is a clear interference in numerous asthma outcomes, such as incidence, prevalence, hospital admission, visits to emergency departments, mortality, and asthma attacks, among others. The particulate matter group of pollutants includes coarse particles/PM10, fine particles/PM2.5, and ultrafine particles/PM0.1. The gaseous components include ground-level ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide. The timing, load, and route of allergen exposure are other items affecting allergic disease phenotypes. The complex interaction between pollutant exposures and human host factors has an implication in the development and rise of asthma as a public health problem. However, there are hiatuses in the understanding of the pathways in this disease. The routes through which pollutants induce asthma are multiple, and include the epigenetic changes that occur in the respiratory tract microbiome, oxidative stress, and immune dysregulation. In addition, the expansion of the modern Westernized lifestyle, which is characterized by intense urbanization and more time spent indoors, resulted in greater exposure to polluted air. Another point to consider is the different role of the environment according to age groups. Children growing up in economically disadvantaged neighborhoods suffer more important negative health impacts. This narrative review highlights the principal polluting agents, their sources of emission, epidemiological findings, and mechanistic evidence that links environmental exposures to asthma.
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Affiliation(s)
- Jose Chatkin
- Pulmonology Division, School of Medicine, Pontifical Catholic University Rio Grande Do Sul (PUCRS), Hospital São Lucas da PUCRS, Porto Alegre, Brazil.
| | - Liana Correa
- Health Sciences Doctorate Program, School of Medicine, Pontifical Catholic University Rio Grande Do Sul (PUCRS), Pulmonologist Hospital São Lucas da PUCRS, Porto Alegre, Brazil
| | - Ubiratan Santos
- Pulmonology Division of Instituto Do Coração, Hospital das Clínicas, University of São Paulo Medical School, São Paulo, Brazil
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Li Q, Yi Q, Tang L, Luo S, Tang Y, Zhang G, Luo Z. Influence of Ultrafine Particles Exposure on Asthma Exacerbation in Children: A Meta-Analysis. Curr Drug Targets 2020; 20:412-420. [PMID: 30156156 DOI: 10.2174/1389450119666180829114252] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 07/27/2018] [Accepted: 08/27/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Air pollution is a major cause of asthma exacerbation. Most studies have shown that exposure to coarse and fine particulate matter is associated with asthma exacerbation. Ultrafine particles (UFPs, aerodynamic diameter ≤ 0.1 µm) are the smallest airborne particles, which are capable of penetrating deep into the lungs. Toxicological studies have suggested that exposure to UFPs may have serious effects on respiratory health. However, epidemiological evidence on the effects of UFPs exposure on asthma exacerbation in children remains unclear. OBJECTIVE We conducted a meta-analysis to quantitatively assess the effects of exposure to UFPs on childhood asthma exacerbation. METHODS We searched four databases for epidemiological studies published until March 20, 2018. Pooled Odds Ratios (OR) and 95% confidence intervals (95% CIs) per 10000 particles/cm3 were estimated using fixed-effect models. Subgroup analyses, sensitivity analyses, and Begg's and Egger's regression were also performed. RESULTS Eight moderate-high quality studies with 51542 events in total satisfied the inclusion criteria. Exposure to UFPs showed a positive association with childhood asthma exacerbation [OR (95% CI): 1.070 (1.037, 1.104)], increased asthma-associated emergency department visits [OR (95% CI): 1.111 (1.055, 1.170)], and asthma-associated hospital admissions [OR (95% CI): 1.045 (1.004, 1.088)] and had a stronger association with childhood asthma exacerbation at long lags [OR (95% CI):1.060 (1.039, 1.082)]. A low heterogeneity and no publication bias were detected. CONCLUSION Exposure to UFPs may increase the risk of asthma exacerbation and may be strongly associated with childhood asthma exacerbation at long lags.
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Affiliation(s)
- Qinyuan Li
- Key Laboratory of Pediatrics in Chongqing, Chongqing 401122, China.,Department of Children's Hospital of Chongqing Medical University of Education Key Laboratory of Child Development and Disorders, Chongqing 401122, China
| | - Qian Yi
- Key Laboratory of Pediatrics in Chongqing, Chongqing 401122, China.,Department of Children's Hospital of Chongqing Medical University of Education Key Laboratory of Child Development and Disorders, Chongqing 401122, China
| | - Lin Tang
- Key Laboratory of Pediatrics in Chongqing, Chongqing 401122, China.,Department of Children's Hospital of Chongqing Medical University of Education Key Laboratory of Child Development and Disorders, Chongqing 401122, China
| | - Siying Luo
- Key Laboratory of Pediatrics in Chongqing, Chongqing 401122, China.,Department of Children's Hospital of Chongqing Medical University of Education Key Laboratory of Child Development and Disorders, Chongqing 401122, China
| | - Yuan Tang
- Key Laboratory of Pediatrics in Chongqing, Chongqing 401122, China.,Department of Children's Hospital of Chongqing Medical University of Education Key Laboratory of Child Development and Disorders, Chongqing 401122, China
| | - Guangli Zhang
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, Chongqing 401122, China
| | - Zhengxiu Luo
- Department of Respiratory Medicine, Children's Hospital of Chongqing Medical University, Chongqing 401122, China
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Buters J, Behrendt H, Raulf M. Allergien und Umwelteinflüsse. ALLERGO JOURNAL 2019. [DOI: 10.1007/s15007-019-1835-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ultrafine particles and ozone perturb norepinephrine clearance rather than centrally generated sympathetic activity in humans. Sci Rep 2019; 9:3641. [PMID: 30842540 PMCID: PMC6403347 DOI: 10.1038/s41598-019-40343-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 02/08/2019] [Indexed: 11/21/2022] Open
Abstract
Cardiovascular risk rapidly increased following exposure to air pollution. Changes in human autonomic regulation have been implicated based on epidemiological associations between exposure estimates and indirect autonomic nervous system measurements. We conducted a mechanistic study to test the hypothesis that, in healthy older individuals, well-defined experimental exposure to ultrafine carbon particles (UFP) increases sympathetic nervous system activity and more so with added ozone (O3). Eighteen participants (age >50 years, 6 women) were exposed to filtered air (Air), UFP, and UFP + O3 combination for 3 hours during intermittent bicycle ergometer training in a randomized, crossover, double-blind fashion. Two hours following exposure, respiration, electrocardiogram, blood pressure, and muscle sympathetic nerve activity (MSNA) were recorded at supine rest, during deep breathing, and during a Valsalva manoeuvre. Catechols and inflammatory marker levels were measured in venous blood samples. Induced sputum was obtained 3.5 h after exposure. Combined exposure to UFP + O3 but not UFP alone, caused a significant increase in sputum neutrophils and circulating leucocytes. Norepinephrine was modestly increased while the ratio between plasma dihydroxyphenylglycol (DHPG) and norepinephrine levels, a marker for norepinephrine clearance, was reduced with UFP + O3. Resting MSNA was not different (47 ± 12 with Air, 47 ± 14 with UFP, and 45 ± 14 bursts/min with UFP + O3). Indices of parasympathetic heart rate control were unaffected by experimental air pollution. Our study suggests that combined exposure to modest UFP and O3 levels increases peripheral norepinephrine availability through decreased clearance rather than changes in central autonomic activity. Pulmonary inflammatory response may have perturbed pulmonary endothelial norepinephrine clearance.
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9
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Poh TY, Ali NABM, Mac Aogáin M, Kathawala MH, Setyawati MI, Ng KW, Chotirmall SH. Inhaled nanomaterials and the respiratory microbiome: clinical, immunological and toxicological perspectives. Part Fibre Toxicol 2018; 15:46. [PMID: 30458822 PMCID: PMC6245551 DOI: 10.1186/s12989-018-0282-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 10/31/2018] [Indexed: 12/17/2022] Open
Abstract
Our development and usage of engineered nanomaterials has grown exponentially despite concerns about their unfavourable cardiorespiratory consequence, one that parallels ambient ultrafine particle exposure from vehicle emissions. Most research in the field has so far focused on airway inflammation in response to nanoparticle inhalation, however, little is known about nanoparticle-microbiome interaction in the human airway and the environment. Emerging evidence illustrates that the airway, even in its healthy state, is not sterile. The resident human airway microbiome is further altered in chronic inflammatory respiratory disease however little is known about the impact of nanoparticle inhalation on this airway microbiome. The composition of the airway microbiome, which is involved in the development and progression of respiratory disease is dynamic, adding further complexity to understanding microbiota-host interaction in the lung, particularly in the context of nanoparticle exposure. This article reviews the size-dependent properties of nanomaterials, their body deposition after inhalation and factors that influence their fate. We evaluate what is currently known about nanoparticle-microbiome interactions in the human airway and summarise the known clinical, immunological and toxicological consequences of this relationship. While associations between inhaled ambient ultrafine particles and host immune-inflammatory response are known, the airway and environmental microbiomes likely act as intermediaries and facilitate individual susceptibility to inhaled nanoparticles and toxicants. Characterising the precise interaction between the environment and airway microbiomes, inhaled nanoparticles and the host immune system is therefore critical and will provide insight into mechanisms promoting nanoparticle induced airway damage.
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Affiliation(s)
- Tuang Yeow Poh
- Translational Respiratory Research Laboratory, Lee Kong Chian School of Medicine, Nanyang Technological University, Level 12, Clinical Sciences Building, 11 Mandalay Road, Singapore, 308232, Singapore
| | - Nur A'tikah Binte Mohamed Ali
- Translational Respiratory Research Laboratory, Lee Kong Chian School of Medicine, Nanyang Technological University, Level 12, Clinical Sciences Building, 11 Mandalay Road, Singapore, 308232, Singapore
| | - Micheál Mac Aogáin
- Translational Respiratory Research Laboratory, Lee Kong Chian School of Medicine, Nanyang Technological University, Level 12, Clinical Sciences Building, 11 Mandalay Road, Singapore, 308232, Singapore
| | - Mustafa Hussain Kathawala
- School of Materials Science and Engineering, Nanyang Technological University, Block N4.1, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Magdiel Inggrid Setyawati
- School of Materials Science and Engineering, Nanyang Technological University, Block N4.1, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Kee Woei Ng
- School of Materials Science and Engineering, Nanyang Technological University, Block N4.1, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Sanjay Haresh Chotirmall
- Translational Respiratory Research Laboratory, Lee Kong Chian School of Medicine, Nanyang Technological University, Level 12, Clinical Sciences Building, 11 Mandalay Road, Singapore, 308232, Singapore.
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Abstract
Abstract
Background
Air pollutants such as particulate matter (PM2.5) and nitrogen dioxide (NO2) in outdoor air have long been suspected of causing the development of asthma and allergic rhinitis. However, a variety of systematic reviews have reached different conclusions in the last 15 years on whether these air pollutants do in actual fact play a causal role in the onset of asthma, allergic rhinitis, and eczema.
Methods
Based on published systematic reviews and the most recent publications, the current state of knowledge on epidemiological evidence is presented and the potential for primary prevention of these allergic diseases by reducing or avoiding exposure to these air pollutants evaluated.
Results
Despite conducting an extensive literature search, analyzing the most recent results, and focusing on the birth cohort studies most relevant to the question in hand, epidemiological results do not adequately support the concept of a causal relationship between the two air pollutants in question, PM2.5 and NO2, and asthma. Epidemiological studies predominantly show no effect of these air pollutants on allergic sensitization and the onset of allergic rhinitis. The small number of studies that have investigated the link between air pollutants and eczema largely revealed there to be no link.
Conclusion
If the evidence for the causal role of air pollutants in the onset of allergies is inconclusive, one must assume that it is probably not possible to achieve primary prevention of allergies by improving air quality. However, there is sufficient evidence to show that air pollutants can trigger exacerbations of allergic diseases. This alone justifies ensuring that the existing threshold values for air pollutants are adhered to, in order to protect particularly allergy sufferers from health impairments.
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Su H, Li Z, Lazar L, Alhamoud Y, Song X, Li J, Wang Y, Fiati Kenston SS, Lqbal MZ, Wu A, Li Z, Hua Q, Ding M, Zhao J. In vitro evaluation of the toxicity and underlying molecular mechanisms of Janus Fe 3 O 4 -TiO 2 nanoparticles in human liver cells. ENVIRONMENTAL TOXICOLOGY 2018; 33:1078-1088. [PMID: 30098274 DOI: 10.1002/tox.22631] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 07/12/2018] [Accepted: 07/16/2018] [Indexed: 05/26/2023]
Abstract
Recent studies show that Janus Fe3 O4 -TiO2 nanoparticles (NPs) have potential applications as a multifunctional agent of magnetic resonance imaging (MRI) and photodynamic therapy (PDT) for the diagnosis and therapy of cancer. However, little work has been done on their biological effects. To evaluate the toxicity and underlying molecular mechanisms of Janus Fe3 O4 -TiO2 nanoparticles, an in vitro study using a human liver cell line HL-7702 cells was conducted. For comparison, the Janus Fe3 O4 -TiO2 NPs parent material TiO2 NPs was also evaluated. Results showed that both Fe3 O4 -TiO2 NPs and TiO2 NPs decreased cell viability and ATP levels when applied in treatment, but increased malonaldehyde (MDA) and reactive oxygen species (ROS) generation. Mitochondria JC-1 staining assay showed that mitochondrial membrane permeability injury occurred in both NPs treated cells. Cell viability analysis showed that TiO2 NPs induced slightly higher cytotoxicity than Fe3 O4 -TiO2 NPs in HL7702 cells. Western blotting indicated that both TiO2 NPs and Fe3 O4 -TiO2 NPs could induce apoptosis, inflammation, and carcinogenesis related signal protein alterations. Comparatively, Fe3 O4 -TiO2 NPs induced higher signal protein expressions than TiO2 NPs under a high treatment dose. However, under a low dose (6.25 μg/cm2 ), neither NPs had any significant toxicity on HL7702 cells. In addition, our results suggest both Fe3 O4 -TiO2 NPs and TiO2 NPs could induce oxidative stress and have a potential carcinogenetic effect in vitro. Further studies are needed to elaborate the detailed mechanisms of toxicity induced by a high dose of Fe3 O4 -TiO2 NPs.
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Affiliation(s)
- Hong Su
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, Medicine School of Ningbo University, Ningbo, People's Republic of China
| | - Zhou Li
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, Medicine School of Ningbo University, Ningbo, People's Republic of China
| | - Lissy Lazar
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, Medicine School of Ningbo University, Ningbo, People's Republic of China
| | - Yasmin Alhamoud
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, Medicine School of Ningbo University, Ningbo, People's Republic of China
| | - Xin Song
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, Medicine School of Ningbo University, Ningbo, People's Republic of China
| | - Juan Li
- Key Laboratory of Magnetic Materials and Devices & Key Laboratory of Additive Manufacturing Materials of Zhejiang Province & Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, People's Republic of China
| | - Yafei Wang
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, Medicine School of Ningbo University, Ningbo, People's Republic of China
| | - Samuel Selorm Fiati Kenston
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, Medicine School of Ningbo University, Ningbo, People's Republic of China
| | - Muhammad Zubair Lqbal
- Key Laboratory of Magnetic Materials and Devices & Key Laboratory of Additive Manufacturing Materials of Zhejiang Province & Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, People's Republic of China
| | - Aiguo Wu
- Key Laboratory of Magnetic Materials and Devices & Key Laboratory of Additive Manufacturing Materials of Zhejiang Province & Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, People's Republic of China
| | - Zhen Li
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, Medicine School of Ningbo University, Ningbo, People's Republic of China
| | - Qihang Hua
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, Medicine School of Ningbo University, Ningbo, People's Republic of China
| | - Min Ding
- Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Jinshun Zhao
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, Medicine School of Ningbo University, Ningbo, People's Republic of China
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12
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Bedeutung von Klima- und Umweltschutz für die Gesundheit mit besonderer Berücksichtigung von Schädigungen der Hautbarriere und allergischen Folgeerkrankungen. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2018; 61:684-696. [DOI: 10.1007/s00103-018-2742-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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13
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Low Dose Carbon Black Nanoparticle Exposure Does Not Aggravate Allergic Airway Inflammation in Mice Irrespective of the Presence of Surface Polycyclic Aromatic Hydrocarbons. NANOMATERIALS 2018; 8:nano8040213. [PMID: 29614747 PMCID: PMC5923543 DOI: 10.3390/nano8040213] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 03/21/2018] [Accepted: 03/29/2018] [Indexed: 11/25/2022]
Abstract
Exposure to exogenous noxae, such as particulate matter, can trigger acute aggravations of allergic asthma—a chronic inflammatory airway disease. We tested whether Carbon Black nanoparticles (CBNP) with or without surface polycyclic aromatic hydrocarbons (PAH) aggravate an established allergic airway inflammation in mice. In an ovalbumin mouse model, Printex®90 (P90), P90 coated with benzo[a]pyrene (P90-BaP) or 9-nitroanthracene (P90-9NA), or acetylene soot exhibiting a mixture of surface PAH (AS-PAH) was administered twice (70 µL, 100 µg/mL) during an established allergic airway inflammation. We analyzed the immune cell numbers and chemokine/cytokine profiles in bronchoalveolar lavages, the mRNA expressions of markers for PAH metabolism (Cyp1a1, 1b1), oxidative stress (HO-1, Gr, Gpx-3), inflammation (KC, Mcp-1, IL-6, IL-13, IL-17a), mucin synthesis (Muc5ac, Muc5b), the histology of mucus-producing goblet cells, ciliary beat frequency (CBF), and the particle transport speed. CBNP had a comparable primary particle size, hydrodynamic diameter, and ζ-potential, but differed in the specific surface area (P90 > P90-BaP = P90-9NA = AS-PAH) and surface chemistry. None of the CBNP tested increased any parameter related to inflammation. The unmodified P90, however, decreased the tracheal CBF, decreased the Muc5b in intrapulmonary airways, but increased the tracheal Muc5ac. Our results demonstrated that irrespective of the surface PAH, a low dose of CBNP does not acutely aggravate an established allergic airway inflammation in mice.
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14
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Hansbro PM, Kim RY, Starkey MR, Donovan C, Dua K, Mayall JR, Liu G, Hansbro NG, Simpson JL, Wood LG, Hirota JA, Knight DA, Foster PS, Horvat JC. Mechanisms and treatments for severe, steroid-resistant allergic airway disease and asthma. Immunol Rev 2018; 278:41-62. [PMID: 28658552 DOI: 10.1111/imr.12543] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Severe, steroid-resistant asthma is clinically and economically important since affected individuals do not respond to mainstay corticosteroid treatments for asthma. Patients with this disease experience more frequent exacerbations of asthma, are more likely to be hospitalized, and have a poorer quality of life. Effective therapies are urgently required, however, their development has been hampered by a lack of understanding of the pathological processes that underpin disease. A major obstacle to understanding the processes that drive severe, steroid-resistant asthma is that the several endotypes of the disease have been described that are characterized by different inflammatory and immunological phenotypes. This heterogeneity makes pinpointing processes that drive disease difficult in humans. Clinical studies strongly associate specific respiratory infections with severe, steroid-resistant asthma. In this review, we discuss key findings from our studies where we describe the development of representative experimental models to improve our understanding of the links between infection and severe, steroid-resistant forms of this disease. We also discuss their use in elucidating the mechanisms, and their potential for developing effective therapeutic strategies, for severe, steroid-resistant asthma. Finally, we highlight how the immune mechanisms and therapeutic targets we have identified may be applicable to obesity-or pollution-associated asthma.
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Affiliation(s)
- Philip M Hansbro
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Richard Y Kim
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Malcolm R Starkey
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Chantal Donovan
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Kamal Dua
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Jemma R Mayall
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Gang Liu
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Nicole G Hansbro
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Jodie L Simpson
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Lisa G Wood
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Jeremy A Hirota
- James Hogg Research Centre, University of British Columbia, Vancouver, BC, Canada
| | - Darryl A Knight
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Paul S Foster
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Jay C Horvat
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
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15
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Traidl-Hoffmann C. [Allergy - an environmental disease]. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2018; 60:584-591. [PMID: 28466132 DOI: 10.1007/s00103-017-2547-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The increase in allergies is a phenomenon that is being observed in all fast-developing countries. For a long time, science has taken as a starting point that solely a genetic predisposition is a precondition for the development of an allergy. Today, knowledge of environmental factors that can alter genes or the transcription of genes in the cells, has improved. Epidemiological studies have meanwhile identified several environmental factors that have a protective or supporting effect on allergy development. The environmental microbiome has recently gained central interest. A common theme in most of the studies is diversity: reduced diversity is correlated with enhanced risk for chronic inflammatory diseases and allergy.It is now of great interest for research to further analyze such environment-gene and/or environment-human interactions on all levels - from organs to cells to small and microstructures such as genes. For immunologists, it is specifically about understanding the influencing factors and effector pathways of allergens, and to apply thereby obtained insights in the follow-up for the ultimate goal of allergy research - prevention.
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Affiliation(s)
- Claudia Traidl-Hoffmann
- Lehrstuhl für Umweltmedizin, UNIKA-T, Technische Universität München, Neusässer Straße 47, 86156, Augsburg, Deutschland. .,CK-CARE, Christine Kühne - Center for Allergy Research and Education, Davos, Schweiz. .,Institut für Umweltmedizin, Helmholtzzentrum München, German Research Center for Environmental Health, München, Deutschland. .,Ambulanz für Umweltmedizin, Klinikum Augsburg, Stenglinstr. 2, 86156, Augsburg, Deutschland.
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16
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Meldrum K, Guo C, Marczylo EL, Gant TW, Smith R, Leonard MO. Mechanistic insight into the impact of nanomaterials on asthma and allergic airway disease. Part Fibre Toxicol 2017; 14:45. [PMID: 29157272 PMCID: PMC5697410 DOI: 10.1186/s12989-017-0228-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 11/10/2017] [Indexed: 01/02/2023] Open
Abstract
Asthma is a chronic respiratory disease known for its high susceptibility to environmental exposure. Inadvertent inhalation of engineered or incidental nanomaterials is a concern for human health, particularly for those with underlying disease susceptibility. In this review we provide a comprehensive analysis of those studies focussed on safety assessment of different nanomaterials and their unique characteristics on asthma and allergic airway disease. These include in vivo and in vitro approaches as well as human and population studies. The weight of evidence presented supports a modifying role for nanomaterial exposure on established asthma as well as the development of the condition. Due to the variability in modelling approaches, nanomaterial characterisation and endpoints used for assessment in these studies, there is insufficient information for how one may assign relative hazard potential to individual nanoscale properties. New developments including the adoption of standardised models and focussed in vitro and in silico approaches have the potential to more reliably identify properties of concern through comparative analysis across robust and select testing systems. Importantly, key to refinement and choice of the most appropriate testing systems is a more complete understanding of how these materials may influence disease at the cellular and molecular level. Detailed mechanistic insight also brings with it opportunities to build important population and exposure susceptibilities into models. Ultimately, such approaches have the potential to more clearly extrapolate relevant toxicological information, which can be used to improve nanomaterial safety assessment for human disease susceptibility.
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Affiliation(s)
- Kirsty Meldrum
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK
| | - Chang Guo
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK
| | - Emma L Marczylo
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK
| | - Timothy W Gant
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK
| | - Rachel Smith
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK
| | - Martin O Leonard
- Toxicology Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Harwell Campus, OX11 0RQ, UK.
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17
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Chen S, Yin R, Mutze K, Yu Y, Takenaka S, Königshoff M, Stoeger T. No involvement of alveolar macrophages in the initiation of carbon nanoparticle induced acute lung inflammation in mice. Part Fibre Toxicol 2016; 13:33. [PMID: 27328634 PMCID: PMC4915176 DOI: 10.1186/s12989-016-0144-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 06/10/2016] [Indexed: 12/25/2022] Open
Abstract
Background Carbonaceous nanoparticles (CNP) represent a major constituent of urban particulate air pollution, and inhalation of high CNP levels has been described to trigger a pro-inflammatory response of the lung. While several studies identified specific particle characteristics driving respiratory toxicity of low-solubility and low-toxicity particles such as CNP, the major lung cell type, which initiates and drives that response, remains still uncertain. Since alveolar macrophages (AM) are known to effectively phagocytose inhaled particles and play a crucial role for the initiation of pulmonary inflammation caused by invading microbes, we aimed to determine their role for sterile stimuli such as CNP by profiling the primary alveolar cell compartments of the lung. We exposed C57BL/6 mice to 20 μg CNP by intratracheal instillation and comprehensively investigated the expression of the underlying mediators during a time span of 3 to 72 h in three different lung cell populations: CD45- (negative) structural cells, CD45+ (positive) leukocytes, and by BAL recovered cells. Results Bronchoalveolar lavage (BAL) analysis revealed an acute inflammatory response characterized by the most prominent culmination of neutrophil granulocytes from 12 to 24 h after instillation, which declined to basal levels by day 7. As early as 3 h after CNP exposure 50 % of the AM revealed particle laden. BAL concentrations and lung gene expression profiles of TNFα, and the neutrophil chemoattractants CXCL1,-2 and-5 preceded the neutrophil recruitment and showed highest levels after 12 h of CNP exposure, pointing to a significant activation of the inflammation-evoking lung cells at this point of time. AM, isolated from lungs 3 to 12 h after CNP instillation, however, did not show a pro-inflammatory signature. On the contrary, gene expression analysis of different lung cell populations isolated 12 h after CNP instillation revealed CD45-, mainly representing alveolar epithelial type II (ATII) cells as major producer of inflammatory CXCL cytokines. Particularly by CD45- cells expressed Cxcl5 proved to be the most abundant chemokine, being 12 h after CNP exposure 24 (±11) fold induced. Conclusion Our data suggests that AM are noninvolved in the initiation of the inflammatory response. ATII cells, which induced highest CXCL levels early on, might in contrast be the driver of acute neutrophilic inflammation upon pulmonary CNP exposure. Electronic supplementary material The online version of this article (doi:10.1186/s12989-016-0144-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Shanze Chen
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany.,Department of Pathophysiology, West China School of Preclinical Sciences and Forensic Medicine, Sichuan University, Chengdu, 610041, Sichuan Province, People's Republic of China
| | - Renfu Yin
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany.,Department of Veterinary Preventive Medicine, College of Veterinary Medicine, Jilin University, Changchun, Jilin, China
| | - Kathrin Mutze
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Youjia Yu
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Shinji Takenaka
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Melanie Königshoff
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Tobias Stoeger
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany.
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18
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Clifford RL, Jones MJ, MacIsaac JL, McEwen LM, Goodman SJ, Mostafavi S, Kobor MS, Carlsten C. Inhalation of diesel exhaust and allergen alters human bronchial epithelium DNA methylation. J Allergy Clin Immunol 2016; 139:112-121. [PMID: 27321436 DOI: 10.1016/j.jaci.2016.03.046] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 02/15/2016] [Accepted: 03/22/2016] [Indexed: 01/24/2023]
Abstract
BACKGROUND Allergic disease affects 30% to 40% of the world's population, and its development is determined by the interplay between environmental and inherited factors. Air pollution, primarily consisting of diesel exhaust emissions, has increased at a similar rate to allergic disease. Exposure to diesel exhaust may play a role in the development and progression of allergic disease, in particular allergic respiratory disease. One potential mechanism underlying the connection between air pollution and increased allergic disease incidence is DNA methylation, an epigenetic process with the capacity to integrate gene-environment interactions. OBJECTIVE We sought to investigate the effect of allergen and diesel exhaust exposure on bronchial epithelial DNA methylation. METHODS We performed a randomized crossover-controlled exposure study to allergen and diesel exhaust in humans, and measured single-site (CpG) resolution global DNA methylation in bronchial epithelial cells. RESULTS Exposure to allergen alone, diesel exhaust alone, or allergen and diesel exhaust together (coexposure) led to significant changes in 7 CpG sites at 48 hours. However, when the same lung was exposed to allergen and diesel exhaust but separated by approximately 4 weeks, significant changes in more than 500 sites were observed. Furthermore, sites of differential methylation differed depending on which exposure was experienced first. Functional analysis of differentially methylated CpG sites found genes involved in transcription factor activity, protein metabolism, cell adhesion, and vascular development, among others. CONCLUSIONS These findings suggest that specific exposures can prime the lung for changes in DNA methylation induced by a subsequent insult.
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Affiliation(s)
- Rachel L Clifford
- Centre for Molecular Medicine and Therapeutics, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Meaghan J Jones
- Centre for Molecular Medicine and Therapeutics, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Julia L MacIsaac
- Centre for Molecular Medicine and Therapeutics, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Lisa M McEwen
- Centre for Molecular Medicine and Therapeutics, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Sarah J Goodman
- Centre for Molecular Medicine and Therapeutics, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Sara Mostafavi
- Centre for Molecular Medicine and Therapeutics, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada; Department of Statistics, University of British Columbia, Vancouver, British Columbia, Canada; Canadian Institute for Advanced Research, Toronto, Ontario, Canada
| | - Michael S Kobor
- Centre for Molecular Medicine and Therapeutics, Child and Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada; Canadian Institute for Advanced Research, Toronto, Ontario, Canada; Human Early Learning Partnership, School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
| | - Chris Carlsten
- Air Pollution Exposure Laboratory, Chan-Yeung Centre for Occupational and Environmental Lung Disease, Division of Respiratory Medicine, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
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19
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Li N, Georas S, Alexis N, Fritz P, Xia T, Williams MA, Horner E, Nel A. A work group report on ultrafine particles (American Academy of Allergy, Asthma & Immunology): Why ambient ultrafine and engineered nanoparticles should receive special attention for possible adverse health outcomes in human subjects. J Allergy Clin Immunol 2016; 138:386-96. [PMID: 27130856 DOI: 10.1016/j.jaci.2016.02.023] [Citation(s) in RCA: 138] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 01/30/2016] [Accepted: 02/24/2016] [Indexed: 01/08/2023]
Abstract
Ultrafine particles (UFPs) are airborne particulates of less than 100 nm in aerodynamic diameter. Examples of UFPs are diesel exhaust particles, products of cooking, heating, and wood burning in indoor environments, and, more recently, products generated through the use of nanotechnology. Studies have shown that ambient UFPs have detrimental effects on both the cardiovascular and respiratory systems, including a higher incidence of atherosclerosis and exacerbation rate of asthma. UFPs have been found to alter in vitro and in vivo responses of the immune system to allergens and can also play a role in allergen sensitization. The inflammatory properties of UFPs can be mediated by a number of different mechanisms, including the ability to produce reactive oxygen species, leading to the generation of proinflammatory cytokines and airway inflammation. In addition, because of their small size, UFPs also have unique distribution characteristics in the respiratory tree and circulation and might be able to alter cellular function in ways that circumvent normal signaling pathways. Additionally, UFPs can penetrate intracellularly and potentially cause DNA damage. The recent advances in nanotechnology, although opening up new opportunities for the advancement of technology and medicine, could also lead to unforeseen adverse health effects in exposed human subjects. Further research is needed to clarify the safety of nanoscale particles, as well as the elucidation of the possible beneficial use of these particulates to treat disease.
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Affiliation(s)
- Ning Li
- Department of Pathology & Diagnostic Investigation, CVM, Michigan State University, East Lansing, Mich.
| | - Steve Georas
- Department of Medicine, University of Rochester School of Medicine, Rochester, NY
| | - Neil Alexis
- Center for Environmental Medicine and Lung Biology, University of North Carolina, Chapel Hill, NC
| | | | - Tian Xia
- Division of NanoMedicine, Department of Medicine, University of California Los Angeles, Los Angeles, Calif
| | - Marc A Williams
- US Army Public Health Command, Toxicology Portfolio, Health Effects Research Program, Aberdeen Proving Ground, Aberdeen, Md
| | | | - Andre Nel
- Division of NanoMedicine, Department of Medicine, University of California Los Angeles, Los Angeles, Calif.
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20
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Filep Á, Fodor GH, Kun-Szabó F, Tiszlavicz L, Rázga Z, Bozsó G, Bozóki Z, Szabó G, Peták F. Exposure to urban PM1 in rats: development of bronchial inflammation and airway hyperresponsiveness. Respir Res 2016; 17:26. [PMID: 26966003 PMCID: PMC4785744 DOI: 10.1186/s12931-016-0332-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 02/09/2016] [Indexed: 11/10/2022] Open
Abstract
Background Several epidemiological and laboratory studies have evidenced the fact that atmospheric particulate matter (PM) increases the risk of respiratory morbidity. It is well known that the smallest fraction of PM (PM1 - particulate matter having a diameter below 1 μm) penetrates the deepest into the airways. The ratio of the different size fractions in PM is highly variable, but in industrial areas PM1 can be significant. Despite these facts, the health effects of PM1 have been poorly investigated and air quality standards are based on PM10 and PM2.5 (PM having diameters below 10 μm and 2.5 μm, respectively) concentrations. Therefore, this study aimed at determining whether exposure to ambient PM1 at a near alert threshold level for PM10 has respiratory consequences in rats. Methods Rats were either exposed for 6 weeks to 100 μg/m3 (alert threshold level for PM10 in Hungary) urban submicron aerosol, or were kept in room air. End-expiratory lung volume, airway resistance (Raw) and respiratory tissue mechanics were measured. Respiratory mechanics were measured under baseline conditions and following intravenous methacholine challenges to characterize the development of airway hyperresponsiveness (AH). Bronchoalveolar lavage fluid (BALF) was analyzed and lung histology was performed. Results No significant differences were detected in lung volume and mechanical parameters at baseline. However, the exposed rats exhibited significantly greater MCh-induced responses in Raw, demonstrating the progression of AH. The associated bronchial inflammation was evidenced by the accumulation of inflammatory cells in BALF and by lung histology. Conclusions Our findings suggest that exposure to concentrated ambient PM1 (mass concentration at the threshold level for PM10) leads to the development of mild respiratory symptoms in healthy adult rats, which may suggest a need for the reconsideration of threshold limits for airborne PM1.
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Affiliation(s)
- Ágnes Filep
- Department: MTA-SZTE Research Group on Photoacoustic Spectroscopy, H-6720, Szeged, Dóm tér 9, Hungary. .,Department of Optics and Quantum Electronics, University of Szeged, H-6720, Szeged, Dóm tér 9, Hungary.
| | - Gergely H Fodor
- Department of Medical Physics and Informatics, University of Szeged, H-6720, Szeged, Korányi fasor 9, Hungary
| | - Fruzsina Kun-Szabó
- Institute for Environmental Sciences, University of Szeged, H-6720, Szeged, Dóm tér 9, Hungary
| | - László Tiszlavicz
- Department of Pathology, University of Szeged, H-6720, Szeged, Állomás u. 2, Hungary
| | - Zsolt Rázga
- Department of Pathology, University of Szeged, H-6720, Szeged, Állomás u. 2, Hungary
| | - Gábor Bozsó
- Department of Mineralogy, Geochemistry and Petrology, University of Szeged, H-6722, Szeged, Egyetem u. 2, Hungary
| | - Zoltán Bozóki
- Department: MTA-SZTE Research Group on Photoacoustic Spectroscopy, H-6720, Szeged, Dóm tér 9, Hungary.,Department of Optics and Quantum Electronics, University of Szeged, H-6720, Szeged, Dóm tér 9, Hungary
| | - Gábor Szabó
- Department: MTA-SZTE Research Group on Photoacoustic Spectroscopy, H-6720, Szeged, Dóm tér 9, Hungary.,Department of Optics and Quantum Electronics, University of Szeged, H-6720, Szeged, Dóm tér 9, Hungary
| | - Ferenc Peták
- Department of Medical Physics and Informatics, University of Szeged, H-6720, Szeged, Korányi fasor 9, Hungary
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21
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Kroker M, Sydlik U, Autengruber A, Cavelius C, Weighardt H, Kraegeloh A, Unfried K. Preventing carbon nanoparticle-induced lung inflammation reduces antigen-specific sensitization and subsequent allergic reactions in a mouse model. Part Fibre Toxicol 2015; 12:20. [PMID: 26141115 PMCID: PMC4491258 DOI: 10.1186/s12989-015-0093-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Accepted: 06/15/2015] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Exposure of the airways to carbonaceous nanoparticles can contribute to the development of immune diseases both via the aggravation of the allergic immune response in sensitized individuals and by adjuvant mechanisms during the sensitization against allergens. The cellular and molecular mechanisms involved in these adverse pathways are not completely understood. We recently described that the reduction of carbon nanoparticle-induced lung inflammation by the application of the compatible solute ectoine reduced the aggravation of the allergic response in an animal system. In the current study we investigated the influence of carbon nanoparticles on the sensitization of animals to ovalbumin via the airways. Ectoine was used as a preventive strategy against nanoparticle-induced neutrophilic lung inflammation. METHODS Balb/c mice were repetitively exposed to the antigen ovalbumin after induction of airway inflammation by carbon nanoparticles, either in the presence or in the absence of ectoine. Allergic sensitization was monitored by measurement of immunoglobulin levels and immune responses in lung and lung draining lymph nodes after challenge. Furthermore the role of dendritic cells in the effect of carbon nanoparticles was studied in vivo in the lymph nodes but also in vitro using bone marrow derived dendritic cells. RESULTS Animals exposed to antigen in the presence of carbon nanoparticles showed increased effects with respect to ovalbumin sensitization, to the allergic airway inflammation after challenge, and to the specific TH2 response in the lymph nodes. The presence of ectoine during the sensitization significantly reduced these parameters. The number of antigen-loaded dendritic cells in the draining lymph nodes was identified as a possible cause for the adjuvant effect of the nanoparticles. In vitro assays indicate that the direct interaction of the particles with dendritic cells is not able to trigger CCR7 expression, while this endpoint is achieved by lung lavage fluid from nanoparticle-exposed animals. CONCLUSIONS Using the intervention strategy of applying ectoine into the airways of animals we were able to demonstrate the relevance of neutrophilic lung inflammation for the adjuvant effect of carbon nanoparticles on allergic sensitization.
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Affiliation(s)
- Matthias Kroker
- IUF - Leibniz Institut für Umweltmedizinische Forschung, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Ulrich Sydlik
- IUF - Leibniz Institut für Umweltmedizinische Forschung, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Andrea Autengruber
- IUF - Leibniz Institut für Umweltmedizinische Forschung, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | | | | | | | - Klaus Unfried
- IUF - Leibniz Institut für Umweltmedizinische Forschung, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany.
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