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Li K, Song Z, Yue Q, Wang Q, Li Y, Zhu Y, Chen H. Disease-specific transcriptional programs govern airway goblet cell metaplasia. Heliyon 2024; 10:e34105. [PMID: 39071568 PMCID: PMC11283004 DOI: 10.1016/j.heliyon.2024.e34105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 05/02/2024] [Accepted: 07/03/2024] [Indexed: 07/30/2024] Open
Abstract
Hypersecretion of airway mucus caused by goblet cell metaplasia is a characteristic of chronic pulmonary inflammatory diseases including asthma, cystic fibrosis (CF), and chronic obstructive pulmonary disease (COPD). Goblet cells originate from airway progenitor club cells. However, the molecular mechanisms and features of goblet cell metaplasia in lung disease are poorly understood. Herein, public single-cell RNA sequencing datasets of human lungs were reanalyzed to explore the transitional phase as club cells differentiate into goblet cells in asthma, CF, and COPD. We found that changes in club and goblet cells during pathogenesis and cellular transition were associated with signalling pathways related to immune response, oxidative stress, and apoptosis. Moreover, other key drivers of goblet cell specification appeared to be pathologically specific, with interleukin (IL)-13 and hypoxia inducible factor 1 (HIF-1)-induced genetic changes in asthma, cystic fibrosis transmembrane conductance regulator (CFTR) mutation being present in CF, and interactions with CD8+ T cells, mitophagy, and mitochondria-induced apoptosis in COPD. In conclusion, this study revealed the similarities and differences in goblet cell metaplasia in asthma, CF, and COPD at the transcriptome level, thereby providing insights into possible novel therapeutic approaches for these diseases.
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Affiliation(s)
- Kuan Li
- Department of Respiratory Medicine, Haihe Hospital, Tianjin University, 300350, Tianjin, China
- Tianjin Key Laboratory of Lung Regenerative Medicine, Haihe Hospital, Tianjin University, 300350, Tianjin, China
- Tianjin Institute of Respiratory Diseases, 300350, Tianjin, China
| | - Zhaoyu Song
- Tianjin Key Laboratory of Lung Regenerative Medicine, Haihe Hospital, Tianjin University, 300350, Tianjin, China
- Department of Clinical Lab, Tianjin First Central Hospital, 300192, Tianjin, China
| | - Qing Yue
- Tianjin Key Laboratory of Lung Regenerative Medicine, Haihe Hospital, Tianjin University, 300350, Tianjin, China
| | - Qi Wang
- Tianjin Key Laboratory of Lung Regenerative Medicine, Haihe Hospital, Tianjin University, 300350, Tianjin, China
| | - Yu Li
- Department of Respiratory Medicine, Haihe Hospital, Tianjin University, 300350, Tianjin, China
- Department of Tuberculosis, Haihe Clinical School, Tianjin Medical University, 300350, Tianjin, China
- Tianjin Key Laboratory of Lung Regenerative Medicine, Haihe Hospital, Tianjin University, 300350, Tianjin, China
- Tianjin Institute of Respiratory Diseases, 300350, Tianjin, China
| | - Yu Zhu
- Tianjin Key Laboratory of Lung Regenerative Medicine, Haihe Hospital, Tianjin University, 300350, Tianjin, China
- Department of Clinical Laboratory, Haihe Hospital, Tianjin University, 300350, Tianjin, China
| | - Huaiyong Chen
- Department of Respiratory Medicine, Haihe Hospital, Tianjin University, 300350, Tianjin, China
- Department of Tuberculosis, Haihe Clinical School, Tianjin Medical University, 300350, Tianjin, China
- Tianjin Key Laboratory of Lung Regenerative Medicine, Haihe Hospital, Tianjin University, 300350, Tianjin, China
- Tianjin Institute of Respiratory Diseases, 300350, Tianjin, China
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2
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Lin C, Lane KJ, Chomitz VR, Griffiths JK, Brugge D. The Exposure Peaks of Traffic-Related Ultrafine Particles Associated with Inflammatory Biomarkers and Blood Lipid Profiles. TOXICS 2024; 12:147. [PMID: 38393242 PMCID: PMC10893127 DOI: 10.3390/toxics12020147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 02/02/2024] [Accepted: 02/09/2024] [Indexed: 02/25/2024]
Abstract
In this article, we explored the effects of ultrafine particle (UFP) peak exposure on inflammatory biomarkers and blood lipids using two novel metrics-the intensity of peaks and the frequency of peaks. We used data previously collected by the Community Assessment of Freeway Exposure and Health project from participants in the Greater Boston Area. The UFP exposure data were time-activity-adjusted hourly average concentration, estimated using land use regression models based on mobile-monitored ambient concentrations. The outcome data included C-reactive protein, interleukin-6 (IL-6), tumor necrosis factor-alpha receptor 2 (TNF-RII), low-density lipoprotein (LDL), high-density lipoprotein (HDL), triglycerides and total cholesterol. For each health indicator, multivariate regression models were used to assess their associations with UFP peaks (N = 364-411). After adjusting for age, sex, body mass index, smoking status and education level, an increase in UFP peak exposure was significantly (p < 0.05) associated with an increase in TNF-RII and a decrease in HDL and triglycerides. Increases in UFP peaks were also significantly associated with increased IL-6 and decreased total cholesterol, while the same associations were not significant when annual average exposure was used. Our work suggests that analysis using peak exposure metrics could reveal more details about the effect of environmental exposures than the annual average metric.
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Affiliation(s)
- Cheng Lin
- Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston, MA 02111, USA; (C.L.); (V.R.C.); (J.K.G.)
| | - Kevin J. Lane
- Department of Environmental Health, Boston University School of Public Health, Boston, MA 02118, USA;
| | - Virginia R. Chomitz
- Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston, MA 02111, USA; (C.L.); (V.R.C.); (J.K.G.)
| | - Jeffrey K. Griffiths
- Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston, MA 02111, USA; (C.L.); (V.R.C.); (J.K.G.)
- Department of Medicine, Tufts University School of Medicine and Tufts Medical Center, Boston, MA 02111, USA
- Department of Civil and Environmental Engineering, Tufts University School of Engineering, Medford, MA 02155, USA
| | - Doug Brugge
- Department of Public Health Sciences, University of Connecticut School of Medicine, Farmington, CT 06030, USA
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3
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Fiter RJ, Murphy LJ, Gong MN, Cleven KL. The impact of air pollution on asthma: clinical outcomes, current epidemiology, and health disparities. Expert Rev Respir Med 2023; 17:1237-1247. [PMID: 38247719 DOI: 10.1080/17476348.2024.2307545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 01/16/2024] [Indexed: 01/23/2024]
Abstract
INTRODUCTION Air pollution has been shown to have a significant impact on morbidity and mortality of respiratory illnesses including asthma. AREAS COVERED Outdoor air pollution consists of a mixture of individual pollutants including vehicle traffic and industrial pollution. Studies have implicated an array of individual components of air pollution, with PM2.5, NO2, SO2, and ozone being the most classically described, and newer literature implicating other pollutants such as black carbon and volatile organic compounds. Epidemiological and cohort studies have described incidence and prevalence of pollution-related asthma and investigated both acute and chronic air pollution exposure as they relate to asthma outcomes. There is an increasing body of literature tying disparities in pollution exposure to clinical outcomes. In this narrative review, we assessed the published research investigating the association of pollution with asthma outcomes, focusing on the adult population and health care disparities. EXPERT OPINION Pollution has multiple deleterious effects on respiratory health but there is a lack of data on individualized pollution monitoring, making it difficult to establish a temporal relationship between exposure and symptoms, thereby limiting our understanding of safe exposure levels. Future research should focus on more personalized monitoring and treatment plans for mitigating exposure.
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Affiliation(s)
- Ryan J Fiter
- Department of Medicine, Montefiore Medical Center, Bronx, NY, USA
| | - Lila J Murphy
- Department of Medicine, Montefiore Medical Center, Bronx, NY, USA
| | - Michelle N Gong
- Department of Medicine, Montefiore Medical Center, Bronx, NY, USA
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Krystal L Cleven
- Department of Medicine, Montefiore Medical Center, Bronx, NY, USA
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
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4
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Muhamad SA, Safuan S, Stanslas J, Wan Ahmad WAN, Bushra SMR, Nurul AA. Lignosus rhinocerotis extract ameliorates airway inflammation and remodelling via attenuation of TGF-β1 and Activin A in a prolonged induced allergic asthma model. Sci Rep 2023; 13:18442. [PMID: 37891170 PMCID: PMC10611742 DOI: 10.1038/s41598-023-45640-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 10/22/2023] [Indexed: 10/29/2023] Open
Abstract
Allergic asthma is associated with chronic airway inflammation and progressive airway remodelling. The sclerotium of Lignosus rhinocerotis (Cooke) Ryvarden (Tiger Milk mushroom) is used traditionally to treat various illnesses, including asthma in Southeast Asia. This study was carried out to evaluate the effect of L. rhinocerotis extract (LRE) on airway inflammation and remodelling in a chronic model of asthma. The present study investigated the therapeutic effects of LRE on airway inflammation and remodelling in prolonged allergen challenged model in allergic asthma. Female Balb/C mice were sensitised using ovalbumin (OVA) on day 0 and 7, followed by OVA-challenged (3 times/week) for 2, 6 and 10 weeks. LRE (125, 250, 500 mg/kg) were administered by oral gavage one hour after every challenge. One group of mice were left untreated after the final challenge for two weeks. LRE suppressed inflammatory cells and Th2 cytokines (IL-4, IL-5 and IL-13) in BALF and reduced IgE level in the serum. LRE also attenuated eosinophils infiltration and goblet cell hyperplasia in the lung tissues; as well as ameliorated airway remodelling by reducing smooth muscle thickness and reducing the expressions of TGF-β1 and Activin A positive cell in the lung tissues. LRE attenuated airway inflammation and remodelling in the prolonged allergen challenge of allergic asthma model. These findings suggest the therapeutic potential of LRE as an alternative for the management of allergic asthma.
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Affiliation(s)
- Siti-Aminah Muhamad
- School of Health Sciences, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia
| | - Sabreena Safuan
- School of Health Sciences, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia
| | - Johnson Stanslas
- Pharmacotherapeutics Unit, Department of Medicine, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | | | | | - Asma Abdullah Nurul
- School of Health Sciences, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia.
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5
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Poland CA, Duffin R, Weber K, Dekant W, Borm PJA. Is Pulmonary Inflammation a Valid Predictor of Particle Induced Lung Pathology? The Case of Amorphous and Crystalline silicas. Toxicol Lett 2023:S0378-4274(23)00226-6. [PMID: 37454774 DOI: 10.1016/j.toxlet.2023.07.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 07/10/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
Although inflammation is a normal and beneficial response, it is also a key event in the pathology of many chronic diseases, including pulmonary and systemic particle-induced disease. In addition, inflammation is now considered as the key response in standard settings for inhaled particles and a critical endpoint in OECD-based sub-acute/ chronic animal inhalation testing protocols. In this paper, we discuss that whilst the role of inflammation in lung disease is undeniable, it is when inflammation deviates from normal parameters that adversity occurs. We introduce the importance of the time course and in particular, the reversibility of inflammation in the progression towards tissue remodelling and neoplastic changes as commonly seen in rat inhalation studies. For this purpose, we used chronic inhalation studies with synthetic amorphous silicas (SAS) and reactive crystalline silica (RCS) as a source of data to describe the time-course of inflammation towards and beyond adversity. Whilst amorphous silicas induce an acute but reversible inflammatory response, only RCS induces a persistent, progressive response after cessation of exposure, resulting in fibrosis and carcinogenicity in rodents and humans. This suggests that the use of inflammation as a fixed endpoint at the cessation of exposure may not be a reliable predictor of particle-induced lung pathology. We therefore suggest extending the current OECD testing guidelines with a recovery period, that allows inflammation to resolve or progress into altered structure and function, such as fibrosis.
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Affiliation(s)
- Craig A Poland
- Regulatory Compliance Limited, 6 Dryden Road, Loanhead, Midlothian, EH20 9TY, UK; Centre for Inflammation Research, University of Edinburgh, Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Rodger Duffin
- Centre for Inflammation Research, University of Edinburgh, Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, EH16 4TJ, UK
| | - Klaus Weber
- AnaPath Services GmbH, Hammerstrasse 49, 4410 Liestal/Switzerland
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6
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Lu C, Wang F, Liu Q, Deng M, Yang X, Ma P. Effect of NO 2 exposure on airway inflammation and oxidative stress in asthmatic mice. JOURNAL OF HAZARDOUS MATERIALS 2023; 457:131787. [PMID: 37295329 DOI: 10.1016/j.jhazmat.2023.131787] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/27/2023] [Accepted: 06/04/2023] [Indexed: 06/12/2023]
Abstract
Nitrogen dioxide (NO2) is a widespread air pollutant. Epidemiological evidence indicates that NO2 is associated with an increase of incidence rate and mortality of asthma, but its mechanism is still unclear. In this study, we exposed mice to NO2 (5 ppm, 4 h per day for 30 days) intermittently to investigate the development and potential toxicological mechanisms of allergic asthma. We randomly assigned 60 male Balb/c mice to four groups: saline control, ovalbumin (OVA) sensitization, NO2 alone, and OVA+NO2 groups. The involved mechanisms were found from the perspective of airway inflammation and oxidative stress. The results showed that NO2 exposure could aggravate lung inflammation in asthmatic mice, and airway remodeling was characterized by significant thickening of the airway wall and infiltration of inflammatory cells. Moreover, NO2 would aggravate the airway hyperresponsiveness (AHR), which is characterized by significantly elevated inspiratory resistance (Ri) and expiratory resistance (Re), as well as decreased dynamic lung compliance (Cldyn). In addition, NO2 exposure promoted pro-inflammatory cytokines (IL-6 and TNF-α) and serum immunoglobulin (IgE) production. The imbalance of Th1/Th2 cell differentiation (IL-4 increased, IFN-γ reduced, IL-4/IFN-γ significantly increased) played a key role in the inflammatory response of asthma under NO2 exposure. In a nutshell, NO2 exposure could promote allergic airway inflammation and increase asthma susceptibility. The levels of ROS and MDA among asthmatic mice exposed to NO2 increased significantly, while GSH levels sharply decreased. These findings may provide better toxicological evidence for the mechanisms of allergic asthma risk due to NO2 exposure.
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Affiliation(s)
- Chan Lu
- XiangYa School of Public Health, Central South University, Changsha 410078, China.
| | - Faming Wang
- Division of Animal and Human Health Engineering, Department of Biosystems, KU Leuven, Leuven 3001, Belgium
| | - Qin Liu
- XiangYa School of Public Health, Central South University, Changsha 410078, China
| | - Miaomiao Deng
- XiangYa School of Public Health, Central South University, Changsha 410078, China
| | - Xu Yang
- Key Laboratory of Environmental Related Diseases and One Health, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Ping Ma
- Key Laboratory of Environmental Related Diseases and One Health, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
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7
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Kanti MM, Striessnig-Bina I, Wieser BI, Schauer S, Leitinger G, Eichmann TO, Schweiger M, Winkler M, Winter E, Lana A, Kufferath I, Marsh LM, Kwapiszewska G, Zechner R, Hoefler G, Vesely PW. Adipose triglyceride lipase-mediated lipid catabolism is essential for bronchiolar regeneration. JCI Insight 2022; 7:e149438. [PMID: 35349484 PMCID: PMC9090255 DOI: 10.1172/jci.insight.149438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 03/23/2022] [Indexed: 01/18/2023] Open
Abstract
The lung airways are constantly exposed to inhaled toxic substances, resulting in cellular damage that is repaired by local expansion of resident bronchiolar epithelial club cells. Disturbed bronchiolar epithelial damage repair lies at the core of many prevalent lung diseases, including chronic obstructive pulmonary disease, asthma, pulmonary fibrosis, and lung cancer. However, it is still not known how bronchiolar club cell energy metabolism contributes to this process. Here, we show that adipose triglyceride lipase (ATGL), the rate-limiting enzyme for intracellular lipolysis, is critical for normal club cell function in mice. Deletion of the gene encoding ATGL, Pnpla2 (also known as Atgl), induced substantial triglyceride accumulation, decreased mitochondrial numbers, and decreased mitochondrial respiration in club cells. This defect manifested as bronchiolar epithelial thickening and increased airway resistance under baseline conditions. After naphthalene‑induced epithelial denudation, a regenerative defect was apparent. Mechanistically, dysfunctional PPARα lipid-signaling underlies this phenotype because (a) ATGL was needed for PPARα lipid-signaling in regenerating bronchioles and (b) administration of the specific PPARα agonist WY14643 restored normal bronchiolar club cell ultrastructure and regenerative potential. Our data emphasize the importance of the cellular energy metabolism for lung epithelial regeneration and highlight the significance of ATGL-mediated lipid catabolism for lung health.
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Affiliation(s)
- Manu Manjunath Kanti
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
| | - Isabelle Striessnig-Bina
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
| | - Beatrix Irene Wieser
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
| | - Silvia Schauer
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Gerd Leitinger
- BioTechMed-Graz, Graz, Austria
- Division of Cell Biology, Histology, and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Thomas O. Eichmann
- BioTechMed-Graz, Graz, Austria
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
- Core Facility Mass Spectrometry, Medical University of Graz, Graz, Austria
| | - Martina Schweiger
- BioTechMed-Graz, Graz, Austria
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Margit Winkler
- BioTechMed-Graz, Graz, Austria
- Institute of Molecular Biotechnology, NAWI Graz, Graz University of Technology, Graz, Austria
| | - Elke Winter
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Andrea Lana
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Iris Kufferath
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Leigh Matthew Marsh
- BioTechMed-Graz, Graz, Austria
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
- Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Grazyna Kwapiszewska
- BioTechMed-Graz, Graz, Austria
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
- Otto Loewi Research Center, Medical University of Graz, Graz, Austria
- Institute for Lung Health, Giessen, Germany
| | - Rudolf Zechner
- BioTechMed-Graz, Graz, Austria
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Gerald Hoefler
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
| | - Paul Willibald Vesely
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
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8
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Alessandrini F, Musiol S, Schneider E, Blanco-Pérez F, Albrecht M. Mimicking Antigen-Driven Asthma in Rodent Models-How Close Can We Get? Front Immunol 2020; 11:575936. [PMID: 33101301 PMCID: PMC7555606 DOI: 10.3389/fimmu.2020.575936] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 08/31/2020] [Indexed: 12/22/2022] Open
Abstract
Asthma is a heterogeneous disease with increasing prevalence worldwide characterized by chronic airway inflammation, increased mucus secretion and bronchial hyperresponsiveness. The phenotypic heterogeneity among asthmatic patients is accompanied by different endotypes, mainly Type 2 or non-Type 2. To investigate the pathomechanism of this complex disease many animal models have been developed, each trying to mimic specific aspects of the human disease. Rodents have classically been employed in animal models of asthma. The present review provides an overview of currently used Type 2 vs. non-Type 2 rodent asthma models, both acute and chronic. It further assesses the methods used to simulate disease development and exacerbations as well as to quantify allergic airway inflammation, including lung physiologic, cellular and molecular immunologic responses. Furthermore, the employment of genetically modified animals, which provide an in-depth understanding of the role of a variety of molecules, signaling pathways and receptors implicated in the development of this disease as well as humanized models of allergic inflammation, which have been recently developed to overcome differences between the rodent and human immune systems, are discussed. Nevertheless, differences between mice and humans should be carefully considered and limits of extrapolation should be wisely taken into account when translating experimental results into clinical use.
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Affiliation(s)
- Francesca Alessandrini
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Stephanie Musiol
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Evelyn Schneider
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Frank Blanco-Pérez
- Molecular Allergology/Vice President's Research Group, Paul-Ehrlich-Institut, Langen, Germany
| | - Melanie Albrecht
- Molecular Allergology/Vice President's Research Group, Paul-Ehrlich-Institut, Langen, Germany
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9
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López-Valdez N, Guerrero-Palomo G, Rojas-Lemus M, Bizarro-Nevares P, Gonzalez-Villalva A, Ustarroz-Cano M, Rivera-Fernández N, Fortoul TI. The role of the non-ciliated bronchiolar cell in tolerance to inhaled vanadium of the bronchiolar epithelium. Histol Histopathol 2020; 35:497-508. [PMID: 31531844 DOI: 10.14670/hh-18-165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The Non-Ciliated Bronchiolar Cell (NCBC) is responsible for the defense and maintenance of the bronchiolar epithelium. Several cellular defense mechanisms have been associated with an increase in the secretion of CC16 and changes in the phenotype of the cell; these mechanisms could be linked to tolerance to the damage due to exposure to inhaled Particulate Matter (PM) of the epithelium. These defense mechanisms have not been sufficiently explored. In this article, we studied the response of the NCBC to inhaled vanadium, an element which adheres to PM. This response was measured by the changes in the phenotype of the NCBC and the secretion of CC16 in a mouse model. Mice were exposed in two phases to different vanadium concentrations; 1.27 mg/m³ in the first phase and 2.56 mg/m³ in the second phase. Mice were sacrificed on the 2nd, 4th, 5th, 6th and 8th weeks. In the second phase, we observed the following: sloughing of the NCBC, hyperplasia and small inflammatory foci remained without changes and that the expression of CC16 was higher in this phase than in phase I. We also observed a change in the phenotype with a slow decrease in both phases. The increase in the secretion of CC16 and the phenotype reversion could be due to the anti-inflammatory activity of CC16. The changes observed in the second phase could be attributed to the tolerance to inhaled vanadium.
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Affiliation(s)
- Nelly López-Valdez
- Department of Cellular and Tissular Biology, School of Medicine, UNAM, México city, Mexico
- Posgrado en Ciencias Biológicas, UNAM, México city, Mexico
| | | | - Marcela Rojas-Lemus
- Department of Cellular and Tissular Biology, School of Medicine, UNAM, México city, Mexico
| | | | | | - Martha Ustarroz-Cano
- Department of Cellular and Tissular Biology, School of Medicine, UNAM, México city, Mexico
| | - Norma Rivera-Fernández
- Department of Microbiology and Parasitology, School of Medicine, UNAM, México city, Mexico
| | - Teresa I Fortoul
- Department of Cellular and Tissular Biology, School of Medicine, UNAM, México city, Mexico.
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10
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Thurston GD, Balmes JR, Garcia E, Gilliland FD, Rice MB, Schikowski T, Van Winkle LS, Annesi-Maesano I, Burchard EG, Carlsten C, Harkema JR, Khreis H, Kleeberger SR, Kodavanti UP, London SJ, McConnell R, Peden DB, Pinkerton KE, Reibman J, White CW. Outdoor Air Pollution and New-Onset Airway Disease. An Official American Thoracic Society Workshop Report. Ann Am Thorac Soc 2020; 17:387-398. [PMID: 32233861 PMCID: PMC7175976 DOI: 10.1513/annalsats.202001-046st] [Citation(s) in RCA: 103] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Although it is well accepted that air pollution exposure exacerbates preexisting airway disease, it has not been firmly established that long-term pollution exposure increases the risk of new-onset asthma or chronic obstruction pulmonary disease (COPD). This Workshop brought together experts on mechanistic, epidemiological, and clinical aspects of airway disease to review current knowledge regarding whether air pollution is a causal factor in the development of asthma and/or COPD. Speakers presented recent evidence in their respective areas of expertise related to air pollution and new airway disease incidence, followed by interactive discussions. A writing committee summarized their collective findings. The Epidemiology Group found that long-term exposure to air pollution, especially metrics of traffic-related air pollution such as nitrogen dioxide and black carbon, is associated with onset of childhood asthma. However, the evidence for a causal role in adult-onset asthma or COPD remains insufficient. The Mechanistic Group concluded that air pollution exposure can cause airway remodeling, which can lead to asthma or COPD, as well as asthma-like phenotypes that worsen with long-term exposure to air pollution, especially fine particulate matter and ozone. The Clinical Group concluded that air pollution is a plausible contributor to the onset of both asthma and COPD. Available evidence indicates that long-term exposure to air pollution is a cause of childhood asthma, but the evidence for a similar determination for adult asthma or COPD remains insufficient. Further research is needed to elucidate the exact biological mechanism underlying incident childhood asthma, and the specific air pollutant that causes it.
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11
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Gong J, Zhu T, Hu M, Wu Z, Zhang JJ. Different metrics (number, surface area, and volume concentration) of urban particles with varying sizes in relation to fractional exhaled nitric oxide (FeNO). J Thorac Dis 2019; 11:1714-1726. [PMID: 31179118 DOI: 10.21037/jtd.2019.03.90] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background There have been increasing concerns on potential health effects of ultrafine particles (UFP); but little is known as to what are the most biologically relevant metrics for these particles that make up very little mass concentration. We examined a range of particle metrics (number, surface area, active surface area, and volume concentration) in relation to fractional exhaled nitric oxide (FeNO), a well-established biomarker of pulmonary inflammation. Methods We conducted a panel study in 17 non-asthmatic children who attended schools and resided near a monitoring site at which particles in the size range of 3-800 nm were measured using a TDMPS and particles in the size range of 0.5 to 10 µm were measured using an APS. Particles were classified by size into the nucleation, Aitken, accumulation, or coarse mode, respectively, for calculating mode-specific number, surface area, active surface area, and volume concentrations. Each participating child was measured for FeNO daily for 30 days. We used linear mixed-effects models to assess the associations between various particle metrics and FeNO. Results In terms of number concentration, ambient particles in the Aitken mode and in the accumulation mode were significantly and positively associated with FeNO; but particles in the nucleation mode were significantly and negatively associated with FeNO. Moreover, UFP as a lump sum of both nucleation-mode and Aikten-mode particles did not show a significant association with FeNO. In terms of surface area concentration, ambient particles only in the accumulation mode were significantly and positively associated with FeNO. In terms of volume concentration, ambient particles in both the accumulation mode and the coarse mode were significantly and positively associated with FeNO. Analyses of the relationships between FeNO and metrics for particles deposited in the respiratory tract generated consistent findings, showing a negative association for the number concentration of deposited particles (driven by nucleation-mode particles), a positive association for the surface area concentration of deposited particles (driven by accumulation-mode particles), and a positive association for the volume concentration of deposited particles (driven by accumulation-mode and coarse-mode particles). Conclusions Particles contributing largely to the surface area concentration and/or the volume concentration of ambient particles or particles deposited in the respiratory tract had a significant positive association with pulmonary inflammation. Nucleation-mode particles, that have large number concentrations but contribute little to the surface area or volume concentration of ambient or deposited particles, had a significant negative association with FeNO. This may indicate a different biological process or may simply be due to the negative and strong correlation between nucleation-mode and accumulation-mode particles. Given that particles in different modes may have different biological actions, measuring UFP as a whole may not necessarily be useful from a biological effect standpoint.
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Affiliation(s)
- Jicheng Gong
- Beijing Innovation Center for Engineering Science and Advanced Technology, College of Environmental Sciences and Engineering and Center for Environment and Health, Peking University, Beijing 100871, China.,State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering and Center for Environment and Health, Peking University, Beijing 100871, China
| | - Tong Zhu
- Beijing Innovation Center for Engineering Science and Advanced Technology, College of Environmental Sciences and Engineering and Center for Environment and Health, Peking University, Beijing 100871, China.,State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering and Center for Environment and Health, Peking University, Beijing 100871, China
| | - Min Hu
- Beijing Innovation Center for Engineering Science and Advanced Technology, College of Environmental Sciences and Engineering and Center for Environment and Health, Peking University, Beijing 100871, China.,State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering and Center for Environment and Health, Peking University, Beijing 100871, China
| | - Zhijun Wu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering and Center for Environment and Health, Peking University, Beijing 100871, China
| | - Junfeng Jim Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering and Center for Environment and Health, Peking University, Beijing 100871, China.,Nicholas School of the Environment and Global Health Institute, Duke University, Durham, NC, USA.,Duke Kunshan University, Kunshan 215316, China
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12
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Islam J, Zaman K, Chakrabarti S, Chattopadhyay P. Exploration of toxicological impacts following acute and sub-chronic exposure to ethyl anthranilate-loaded mosquito repellent patch. Regul Toxicol Pharmacol 2018; 97:209-224. [PMID: 29969653 DOI: 10.1016/j.yrtph.2018.06.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 02/05/2018] [Accepted: 06/29/2018] [Indexed: 12/12/2022]
Abstract
In the recent years, growing concern about the potential toxicity of synthetic repellents has led to the development of environmentally safe non-toxic insect control methods. Present investigation explores the toxicological impacts of ethyl anthranilate-loaded mosquito repellent patch (EAMRP) on respiratory system following acute and sub-chronic inhalation exposure in Wistar rats. Lungs parameters such as enhanced pause, tidal volume, respiration rate, inspiration time, and expiration time were determined using whole body plethysmograph. X-ray, scanning electron microscopy and histology were utilized to study the morphology and microscopical architecture of lungs. Hematological and serum biochemical markers were estimated. Cytokines such as IL-1β, IL-2, and IL-12 were also estimated in bronchoalveolar lavage fluid using ELISA kits. Finally, acute oral and dermal toxicity studies were carried out to study the accidental or intentional poisoning due to the ingestion and skin contact of EAMRP, respectively. The findings demonstrate that inhalation exposure to EAMRP did not pose any significant dose related toxicity in above mentioned experiments. Further, no appreciable toxicity was observed in both acute oral and dermal exposure. Thus, these results revealed the non toxic nature of EAMRP in preclinical studies. Hence, EAMRP can be used successfully as an alternative to existing synthetic repellents without any potential health hazards.
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Affiliation(s)
- Johirul Islam
- Defence Research Laboratory, Tezpur, Assam, 784001, India; Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, Assam, 786004, India
| | - Kamaruz Zaman
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, Assam, 786004, India
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Hu C, Hou J, Zhou Y, Sun H, Yin W, Zhang Y, Wang X, Wang G, Chen W, Yuan J. Association of polycyclic aromatic hydrocarbons exposure with atherosclerotic cardiovascular disease risk: A role of mean platelet volume or club cell secretory protein. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 233:45-53. [PMID: 29053997 DOI: 10.1016/j.envpol.2017.10.042] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 08/16/2017] [Accepted: 10/11/2017] [Indexed: 05/06/2023]
Abstract
BACKGROUND Inflammation may play an important role in the association between exposure to polycyclic aromatic hydrocarbons (PAHs) and atherosclerotic cardiovascular disease (ASCVD) risk. However, the underlying mechanisms remain unclear. OBJECTIVES To investigate the association of PAHs exposure with ASCVD risk and effects of mean platelet volume (MPV) or Club cell secretory protein (CC16) on the association. METHODS A total of 2022 subjects (689 men and 1333 women) were drawn from the baseline Wuhan residents of the Wuhan-Zhuhai Cohort study. Data on demography and the physical examination were obtained from each participant. Urinary monohydroxy PAH metabolites (OH-PAHs) levels were measured by a gas chromatography-mass spectrometry. We estimated the association between each OH-PAHs and the 10-year ASCVD risk or coronary heart disease (CHD) risk using logistic regression models, and further analyze the mediating effect of MPV or plasma CC16 on the association by using structural equation modeling. RESULTS The results of multiple logistic regression models showed that some OH-PAHs were positively associated with ASCVD risk but not CHD risk, including 2-hydroxyfluoren (β = 1.761; 95% CI: 1.194-2.597), 9-hydroxyfluoren (β = 1.470; 95% CI: 1.139-1.898), 1-hydroxyphenanthrene (β = 1.480; 95% CI: 1.008-2.175) and ΣOH-PAHs levels (β = 1.699; 95% CI: 1.151-2.507). The analysis of structural equation modeling shows that increased MPV and increased plasma CC16 levels contributed 13.6% and 15.1%, respectively, to the association between PAHs exposure and the 10-year ASCVD risk (p < 0.05). CONCLUSIONS Exposure to PAHs may increase the risk of atherosclerosis, which was partially mediated by MPV or CC16.
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Affiliation(s)
- Chen Hu
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China
| | - Jian Hou
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China
| | - Yun Zhou
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China
| | - Huizhen Sun
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China
| | - Wenjun Yin
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China
| | - Youjian Zhang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China
| | - Xian Wang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China
| | - Guiyang Wang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China
| | - Weihong Chen
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China
| | - Jing Yuan
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China.
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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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15
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Specific Surface Modifications of Silica Nanoparticles Diminish Inflammasome Activation and In Vivo Expression of Selected Inflammatory Genes. NANOMATERIALS 2017; 7:nano7110355. [PMID: 29084176 PMCID: PMC5707572 DOI: 10.3390/nano7110355] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 10/22/2017] [Accepted: 10/23/2017] [Indexed: 02/05/2023]
Abstract
Silica (SiO2) nanoparticles (NPs) usage includes, but is not limited to, industrial and biomedical applications. Toxic effects of SiO2 NPs have been explored either in vitro or in vivo, assessing different surface modifications to reduce their harmful effects. Here, murine bone marrow-derived dendritic (BMDC) and a mouse model of mild allergic inflammation were used to study inflammasome activation and lung inflammation. Our results showed that SiO2 plain NPs induced NACHT, LRR and PYD domains-containing protein 3 (NLRP3) inflammasome activation, increasing interleukin (IL)-1β release in vitro, and, to a lesser extent, in vivo. In addition, SiO2 plain NPs triggered a pulmonary inflammatory milieu in both non-sensitized (NS) and sensitized (S) mice, by inducing the expression of key inflammatory cytokines and chemokines. Electron microscopy showed that SiO2 NPs were mostly localized in alveolar macrophages, within vesicles and/or in phagolysosomes. Both the in vitro and the in vivo effects of SiO NPs were attenuated by coating NPs with phosphonate or amino groups, whereas PEGylation, although it mitigated inflammasome activation in vitro, was not a successful coating strategy in vivo. These findings highlight that multiple assays are required to determine the effect of surface modifications in limiting NPs inflammatory potential. Taken together, these data are obtained by comparing in vitro and in vivo effects of SiO2 NPs suggest the use of amino and phosphonate coating of silica NPs for commercial purposes and targeted applications, as they significantly reduce their proinflammatory potential.
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Pro-Inflammatory versus Immunomodulatory Effects of Silver Nanoparticles in the Lung: The Critical Role of Dose, Size and Surface Modification. NANOMATERIALS 2017; 7:nano7100300. [PMID: 28961222 PMCID: PMC5666465 DOI: 10.3390/nano7100300] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 09/20/2017] [Accepted: 09/21/2017] [Indexed: 02/07/2023]
Abstract
The growing use of silver nanoparticles (Ag-NPs) in consumer products raises concerns about their toxicological potential. The purpose of the study was to investigate the size- and coating-dependent pulmonary toxicity of Ag-NPs in vitro and in vivo, using an ovalbumin (OVA)-mouse allergy model. Supernatants from (5.6-45 µg/mL) Ag50-PVP, Ag200-PVP or Ag50-citrate-treated NR8383 alveolar macrophages were tested for lactate dehydrogenase and glucuronidase activity, tumor necrosis factor (TNF)-α release and reactive oxygen species (ROS) production. For the in vivo study, NPs were intratracheally instilled in non-sensitized (NS) and OVA-sensitized (S) mice (1-50 µg/mouse) prior to OVA-challenge and bronchoalveolar lavage fluid (BALF) inflammatory infiltrate was evaluated five days after challenge. In vitro results showed a dose-dependent cytotoxicity of Ag-NPs, which was highest for Ag50-polyvinilpyrrolidone (PVP), followed by Ag50-citrate, and lowest for Ag200-PVP. In vivo 10-50 µg Ag50-PVP triggered a dose-dependent pulmonary inflammatory milieu in NS and S mice, which was significantly higher in S mice and was dampened upon instillation of Ag200-PVP. Surprisingly, instillation of 1 µg Ag50-PVP significantly reduced OVA-induced inflammatory infiltrate in S mice and had no adverse effect in NS mice. Ag50-citrate showed similar beneficial effects at low concentrations and attenuated pro-inflammatory effects at high concentrations. The lung microbiome was altered by NPs instillation dependent on coating and/or mouse batch, showing the most pronounced effects upon instillation of 50 µg Ag50-citrate, which caused an increased abundance of operational taxonomic units assigned to Actinobacteria, Bacteroidetes, Firmicutes and Proteobacteria. However, no correlation with the biphasic effect of low and high Ag-NPs dose was found. Altogether, both in vitro and in vivo data on the pulmonary effects of Ag-NPs suggest the critical role of the size, dose and surface functionalization of Ag-NPs, especially in susceptible allergic individuals. From the perspective of occupational health, care should be taken by the production of Ag-NPs-containing consumer products.
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17
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Differential Effects of Surface-Functionalized Zirconium Oxide Nanoparticles on Alveolar Macrophages, Rat Lung, and a Mouse Allergy Model. NANOMATERIALS 2017; 7:nano7090280. [PMID: 28925985 PMCID: PMC5618391 DOI: 10.3390/nano7090280] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 09/11/2017] [Accepted: 09/12/2017] [Indexed: 12/31/2022]
Abstract
Nanoparticles (NPs) may affect the lung via their chemical composition on the surface. Here, we compared the bioactivity of zirconium oxide (ZrO2) NPs coated with either aminopropilsilane (APTS), tetraoxidecanoic acid (TODS), polyethyleneglycol (PGA), or acrylic acid (Acryl). Supernatants from NPs-treated cultured alveolar macrophages (NR8383) tested for lactate dehydrogenase, glucuronidase, tumor necrosis factor α, and H2O2 formation revealed dose-dependent effects, with only gradual differences among particles whose gravitational settling and cellular uptake were similar. We selected TODS- and Acryl-coated NPs for intratracheal administration into the rat lung. Darkfield and hyperspectral microscopy combined with immunocytochemistry showed that both NPs qualities accumulate mainly within the alveolar macrophage compartment, although minute amounts also occurred in neutrophilic granulocytes. Dose-dependent signs of inflammation were found in the broncho-alveolar lavage fluid on day 3 but no longer on day 21 post-application of ≥1.2 mg per lung; again only minor differences occurred between TODS- and Acryl-coated NPs. In contrast, the response of allergic mice was overall higher compared to control mice and dependent on the surface modification. Increases in eosinophils, lymphocytes and macrophages were highest following ZrO2-PGA administration, followed by ZrO2-Acryl, ZrO2-TODS, and ZrO2-APTS. We conclude that surface functionalization of ZrO2 NPs has minor effects on the inflammatory lung response of rats and mice, but is most relevant for an allergic mouse model. Allergic individuals may therefore be more susceptible to exposure to NPs with specific surface modifications.
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18
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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: 141] [Impact Index Per Article: 17.6] [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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Krämer U, Buters J, Ring J, Behrendt H. Allergie und Umwelt. ALLERGOLOGIE 2016. [DOI: 10.1007/978-3-642-37203-2_40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Samara C, Kouras A, Kaidoglou K, Emmanouil-Nikoloussi EN, Simou C, Bousnaki M, Kelessis A. Ultrastructural alterations in the mouse lung caused by real-life ambient PM10 at urban traffic sites. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 532:327-336. [PMID: 26081735 DOI: 10.1016/j.scitotenv.2015.05.139] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/19/2015] [Accepted: 05/31/2015] [Indexed: 06/04/2023]
Abstract
Current levels of ambient air particulate matter (PM) are associated with mortality and morbidity in urban populations worldwide. Nevertheless, current knowledge does not allow precise quantification or definitive ranking of the health effects of individual PM components and indeed, associations may be the result of multiple components acting on different physiological mechanisms. In this paper, healthy Balb/c mice were exposed to ambient PM10 at a traffic site of a large city (Thessaloniki, northern Greece), in parallel to control mice that were exposed to filtered air. Structural damages were examined in ultrafine sections of lung tissues by Transmission Electronic Microscopy (TEM). Ambient PM10 samples were also collected during the exposure experiment and characterized with respect to chemical composition and oxidative potential. Severe ultrastructural alterations in the lung tissue after a 10-week exposure of mice at PM10 levels often exceeding the daily limit of Directive 2008/50/EC were revealed mainly implying PM-induced oxidative stress. The DTT-based redox activity of PM10 was found within the range of values reported for traffic sites being correlated with traffic-related constituents. Although linkage of the observed lung damage with specific chemical components or sources need further elucidation, the magnitude of biological responses highlight the necessity for national and local strategies for mitigation of particle emissions from combustion sources.
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Affiliation(s)
- Constantini Samara
- Environmental Pollution Control Laboratory, Department of Chemistry, Aristotle University of Thessaloniki, 541 24 Thesaloniki, Greece.
| | - Athanasios Kouras
- Environmental Pollution Control Laboratory, Department of Chemistry, Aristotle University of Thessaloniki, 541 24 Thesaloniki, Greece
| | - Katerina Kaidoglou
- Environmental Pollution Control Laboratory, Department of Chemistry, Aristotle University of Thessaloniki, 541 24 Thesaloniki, Greece
| | - Elpida-Niki Emmanouil-Nikoloussi
- Laboratory of Histology-Embryology and Anthropology, School of Medicine, Aristotle University of Thessaloniki, 541 24 Thesaloniki, Greece
| | - Chrysanthi Simou
- Laboratory of Histology-Embryology and Anthropology, School of Medicine, Aristotle University of Thessaloniki, 541 24 Thesaloniki, Greece
| | - Maria Bousnaki
- Laboratory of Histology-Embryology and Anthropology, School of Medicine, Aristotle University of Thessaloniki, 541 24 Thesaloniki, Greece
| | - Apostolos Kelessis
- Environmental Department, Municipality of Thessaloniki, Kleanthous 18, 54 642 Thessaloniki, Greece
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Berend N. Contribution of air pollution to COPD and small airway dysfunction. Respirology 2015; 21:237-44. [PMID: 26412571 DOI: 10.1111/resp.12644] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Revised: 07/27/2015] [Accepted: 07/27/2015] [Indexed: 01/22/2023]
Abstract
Although in many Western countries levels of ambient air pollution have been improving with the setting of upper limits and better urban planning, air pollution in developing countries and particularly those with rapid industrialization has become a major global problem. Together with increased motor vehicle ownership and traffic congestion, there is a growing issue with airborne particles of respirable size. These particles are thought responsible for respiratory and cardiovascular effects and have also been implicated in cancer pathogenesis. The pathologic effects in the lung are mediated via inflammatory pathways and involve oxidative stress similar to cigarette smoking. These effects are seen in the peripheral airways where the smaller particle fractions are deposited and lead to airway remodelling. However, emphysema and loss of bronchioles seen with cigarette smoking have not been described with ambient air pollution, and there are few studies specifically looking at peripheral airway function. Definitive evidence of air pollution causing COPD is lacking and a different study design is required to link air pollution and COPD.
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Affiliation(s)
- Norbert Berend
- The George Institute for Global Health, Woolcock Institute for Medical Research, University of Sydney, Sydney, Australia
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Wimmer M, Alessandrini F, Gilles S, Frank U, Oeder S, Hauser M, Ring J, Ferreira F, Ernst D, Winkler JB, Schmitt-Kopplin P, Ohnmacht C, Behrendt H, Schmidt-Weber C, Traidl-Hoffmann C, Gutermuth J. Pollen-derived adenosine is a necessary cofactor for ragweed allergy. Allergy 2015; 70:944-54. [PMID: 25939785 DOI: 10.1111/all.12642] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/28/2015] [Indexed: 01/22/2023]
Abstract
BACKGROUND Ragweed (Ambrosia artemisiifolia) is a strong elicitor of allergic airway inflammation with worldwide increasing prevalence. Various components of ragweed pollen are thought to play a role in the development of allergic responses. The aim of this study was to identify critical factors for allergenicity of ragweed pollen in a physiological model of allergic airway inflammation. METHODS Aqueous ragweed pollen extract, the low molecular weight fraction or the major allergen Amb a 1 was instilled intranasally on 1-11 consecutive days, and allergic airway inflammation was evaluated by bronchoalveolar lavage, lung histology, serology, gene expression in lung tissue, and measurement of lung function. Pollen-derived adenosine was removed from the extract enzymatically to analyze its role in ragweed-induced allergy. Migration of human neutrophils and eosinophils toward supernatants of ragweed-stimulated bronchial epithelial cells was analyzed. RESULTS Instillation of ragweed pollen extract, but not of the major allergen or the low molecular weight fraction, induced specific IgG1 , pulmonary infiltration with inflammatory cells, a Th2-associated cytokine signature in pulmonary tissue, and impaired lung function. Adenosine aggravated ragweed-induced allergic lung inflammation. In vitro, human neutrophils and eosinophils migrated toward supernatants of bronchial epithelial cells stimulated with ragweed extract only if adenosine was present. CONCLUSIONS Pollen-derived adenosine is a critical factor in ragweed-pollen-induced allergic airway inflammation. Future studies aim at therapeutic strategies to control these allergen-independent pathways.
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Affiliation(s)
- M. Wimmer
- Institute of Environmental Medicine; UNIKA-T; Technische Universität München; Munich Germany
- Center of Allergy and Environment (ZAUM); Technische Universität and Helmholtz Zentrum München; Member of the German Center for Lung research (DZL); Munich Germany
- Christine Kühne - Center for Allergy Research and Education; Zurich Switzerland
| | - F. Alessandrini
- Center of Allergy and Environment (ZAUM); Technische Universität and Helmholtz Zentrum München; Member of the German Center for Lung research (DZL); Munich Germany
- Christine Kühne - Center for Allergy Research and Education; Zurich Switzerland
| | - S. Gilles
- Institute of Environmental Medicine; UNIKA-T; Technische Universität München; Munich Germany
- Christine Kühne - Center for Allergy Research and Education; Zurich Switzerland
| | - U. Frank
- Christine Kühne - Center for Allergy Research and Education; Zurich Switzerland
- Institute of Biochemical Plant Pathology; Helmholtz Zentrum München; Munich Germany
| | - S. Oeder
- Center of Allergy and Environment (ZAUM); Technische Universität and Helmholtz Zentrum München; Member of the German Center for Lung research (DZL); Munich Germany
- Christine Kühne - Center for Allergy Research and Education; Zurich Switzerland
| | - M. Hauser
- Christine Kühne - Center for Allergy Research and Education; Zurich Switzerland
- Christian Doppler Laboratory for Allergy Diagnosis and Therapy; Department of Molecular Biology; University of Salzburg; Salzburg Austria
| | - J. Ring
- Christine Kühne - Center for Allergy Research and Education; Zurich Switzerland
- Department of Dermatology and Allergy Biederstein; TU Munich; Munich Germany
| | - F. Ferreira
- Christian Doppler Laboratory for Allergy Diagnosis and Therapy; Department of Molecular Biology; University of Salzburg; Salzburg Austria
| | - D. Ernst
- Institute of Biochemical Plant Pathology; Helmholtz Zentrum München; Munich Germany
| | - J. B. Winkler
- Research Unit Environmental Simulation at the Institute of Biochemical Plant Pathology; Helmholtz Zentrum München; Munich Germany
| | - P. Schmitt-Kopplin
- Research Unit Analytical BioGeoChemistry; Helmholtz Zentrum München; Munich Germany
- Analytical Food Chemistry; Technische Universität München; Munich Germany
| | - C. Ohnmacht
- Center of Allergy and Environment (ZAUM); Technische Universität and Helmholtz Zentrum München; Member of the German Center for Lung research (DZL); Munich Germany
| | - H. Behrendt
- Center of Allergy and Environment (ZAUM); Technische Universität and Helmholtz Zentrum München; Member of the German Center for Lung research (DZL); Munich Germany
- Christine Kühne - Center for Allergy Research and Education; Zurich Switzerland
| | - C. Schmidt-Weber
- Center of Allergy and Environment (ZAUM); Technische Universität and Helmholtz Zentrum München; Member of the German Center for Lung research (DZL); Munich Germany
| | - C. Traidl-Hoffmann
- Institute of Environmental Medicine; UNIKA-T; Technische Universität München; Munich Germany
- Christine Kühne - Center for Allergy Research and Education; Zurich Switzerland
- Department of Dermatology and Allergy Biederstein; TU Munich; Munich Germany
| | - J. Gutermuth
- Center of Allergy and Environment (ZAUM); Technische Universität and Helmholtz Zentrum München; Member of the German Center for Lung research (DZL); Munich Germany
- Department of Dermatology and Allergy Biederstein; TU Munich; Munich Germany
- Department of Dermatology; Universitair Ziekenhuis Brussel; Vrije Universiteit Brussel; Brussel Belgium
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23
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Gilles S, Traidl-Hoffmann C. The environment-pathogen-host axis in communicable and non-communicable diseases: recent advances in experimental and clinical research. J Dtsch Dermatol Ges 2015; 12:395-9. [PMID: 24797745 DOI: 10.1111/ddg.12345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Accepted: 02/17/2014] [Indexed: 12/19/2022]
Abstract
Allergies and autoimmune diseases are spreading worldwide. Control of infections, on the other hand, remains an issue, even in the post-antibiotic era. Chronic or poorly controlled infections occur in immune compromised individuals such as HIV patients, hospitalized patients exposed to multi-resistant bacteria, or patients on immunosuppressive treatment. They may become an even more emerging issue in an ageing population. At the same time, profound environmental changes such as global warming, urbanization, increasing environmental pollution and novel food engineering technologies may alter the abundance or aggressiveness of allergens/allergen carriers in our environment. Likewise, changes in dietary habits - and possibly also use of antibiotics - have an impact on the composition of our natural microbial flora in the gut, airways and skin, which may alter susceptibility for common diseases, among them allergies, asthma and atopic eczema. At the recently founded Institute of Environmental Medicine of the Technische Universität Munich, located in Augsburg at the UNIKA-T, experimental, clinical and translational research is focused on the complex interactions of environment, pathogen and host in expression or control of communicable and non-communicable diseases. We present our research concept and recent findings in environment - host interactions.
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Affiliation(s)
- Stefanie Gilles
- Institute of Environmental medicine, UNIKA-T, Klinikum rechts der Isar, Technische Universität München, Germany; CK-Care, Christine Kühne Center for Allergy Research and Education, Davos-Wolfgang, Switzerland
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24
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Marzaioli V, Aguilar-Pimentel JA, Weichenmeier I, Luxenhofer G, Wiemann M, Landsiedel R, Wohlleben W, Eiden S, Mempel M, Behrendt H, Schmidt-Weber C, Gutermuth J, Alessandrini F. Surface modifications of silica nanoparticles are crucial for their inert versus proinflammatory and immunomodulatory properties. Int J Nanomedicine 2014; 9:2815-32. [PMID: 24940059 PMCID: PMC4051720 DOI: 10.2147/ijn.s57396] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Background Silica (SiO2) nanoparticles (NPs) are widely used in diverse industrial and biomedical applications. Their applicability depends on surface modifications, which can limit potential health problems. Objective To assess the potential impact of SiO2 NP exposure and NPs chemical modifications in allergic airway inflammation. Methods Mice were sensitized by five repetitive intraperitoneal injections of ovalbumin/aluminum hydroxide (1 μg) over 42 days, then intratracheally instilled with plain or modified SiO2 NPs (50 μg/mouse), and subsequently aerosol challenged for 20 minutes with ovalbumin. One or 5 days later, allergic inflammation was evaluated by cell differentiation of bronchoalveolar lavage fluid, lung function and gene expression and histopathology, as well as electron and confocal microscopy of pulmonary tissue. Results Plain SiO2 NPs induced proinflammatory and immunomodulatory effects in vivo, highlighted by enhanced infiltration of inflammatory cells in the bronchoalveolar lavage fluid, induction of a pulmonary T helper type 2 (Th2) cytokine pattern, differentiation of type 2 macrophages, and by morphological changes in the lung of sensitized mice. These effects were dramatically attenuated using surface-functionalized NPs with amino and phosphate groups, but not with polyethylene glycol. The role of macrophages in taking up SiO2 NPs was confirmed by flow cytometry, confocal microscopy, and gene expression analysis. Conclusion Our data suggest that amino and phosphate surface modifications, but not polyethylene glycol (PEG), mitigate the proinflammatory and immunomodulatory effect of SiO2 NPs in allergic airway inflammation, paving the way for new strategies in the production of nanomaterials with lower health impact for humans.
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Affiliation(s)
- Viviana Marzaioli
- Center of Allergy and Environment (ZAUM), Technische Universität and Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Juan Antonio Aguilar-Pimentel
- Department of Dermatology and Allergy Biederstein, Technische Universität München (TUM) and German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich-Neuherberg, Germany
| | - Ingrid Weichenmeier
- Center of Allergy and Environment (ZAUM), Technische Universität and Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Georg Luxenhofer
- Institute of Developmental Genetics, Helmholtz Zentrum München, Neuherberg, Germany
| | | | | | | | | | - Martin Mempel
- Department of Dermatology, Venereology and Allergology, Universitätsmedizin Göttingen (UMG), Göttingen, Germany
| | - Heidrun Behrendt
- Center of Allergy and Environment (ZAUM), Technische Universität and Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Carsten Schmidt-Weber
- Center of Allergy and Environment (ZAUM), Technische Universität and Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Jan Gutermuth
- Center of Allergy and Environment (ZAUM), Technische Universität and Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany ; Department of Dermatology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Francesca Alessandrini
- Center of Allergy and Environment (ZAUM), Technische Universität and Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Munich, Germany
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25
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Gilles S, Traidl-Hoffmann C. Die Achse Umwelt-Erreger-Wirt bei übertragbaren und nicht übertragbaren Krankheiten: Jüngste Fortschritte in der experimentellen und klinischen Forschung. J Dtsch Dermatol Ges 2014. [DOI: 10.1111/ddg.12345_suppl] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stefanie Gilles
- Institute of Environmental medicine; UNIKA-T, Klinikum rechts der Isar; Technische Universität München; Germany
- CK-Care, Christine Kühne Center for Allergy Research and Education; Davos-Wolfgang Schweiz
| | - Claudia Traidl-Hoffmann
- Institute of Environmental medicine; UNIKA-T, Klinikum rechts der Isar; Technische Universität München; Germany
- CK-Care, Christine Kühne Center for Allergy Research and Education; Davos-Wolfgang Schweiz
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26
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Beck-Speier I, Karg E, Behrendt H, Stoeger T, Alessandrini F. Ultrafine particles affect the balance of endogenous pro- and anti-inflammatory lipid mediators in the lung: in-vitro and in-vivo studies. Part Fibre Toxicol 2012; 9:27. [PMID: 22809365 PMCID: PMC3508980 DOI: 10.1186/1743-8977-9-27] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Accepted: 06/14/2012] [Indexed: 03/07/2023] Open
Abstract
Background Exposure to ultrafine particles exerts diverse harmful effects including aggravation of pulmonary diseases like asthma. Recently we demonstrated in a mouse model for allergic airway inflammation that particle-derived oxidative stress plays a crucial role during augmentation of allergen-induced lung inflammation by ultrafine carbon particle (UfCP) inhalation. The mechanisms how particle inhalation might change the inflammatory balance in the lungs, leading to accelerated inflammatory reactions, remain unclear. Lipid mediators, known to be immediately generated in response to tissue injury, might be strong candidates for priming this particle-triggered change of the inflammatory balance. Methods We hypothesize that inhalation of UfCP may disturb the balance of pro- and anti-inflammatory lipid mediators in: i) a model for acute allergic pulmonary inflammation, exposing mice for 24 h before allergen challenge to UfCP inhalation (51.7 nm, 507 μg/m3), and ii) an in-vitro model with primary rat alveolar macrophages (AM) incubated with UfCP (10 μg/1 x 106 cells/ml) for 1 h. Lungs and AM were analysed for pro- and anti-inflammatory lipid mediators, namely leukotriene B4 (LTB4), prostaglandin E2 (PGE2), 15(S)-hydroxy-eicosatetraenoic acid (15(S)-HETE), lipoxin A4 (LXA4) and oxidative stress marker 8-isoprostane by enzyme immunoassays and immunohistochemistry. Results In non-sensitized mice UfCP exposure induced a light non-significant increase of all lipid mediators. Similarly but significantly in rat AM all lipid mediators were induced already within 1 h of UfCP stimulation. Also sensitized and challenge mice exposed to filtered air showed a partially significant increase in all lipid mediators. In sensitized and challenged mice UfCP exposure induced highest significant levels of all lipid mediators in the lungs together with the peak of allergic airway inflammation on day 7 after UfCP inhalation. The levels of LTB4, 8-isoprostane and PGE2 were significantly increased also one day after UfCP exposure. Immunohistochemistry localized highest concentrations of PGE2 especially in AM one day after UfCP exposure. Conclusion Our results suggest that UfCP exposure affects the balance between pro- and anti-inflammatory lipid mediators. In allergic mice, where the endogenous balance of pro- and anti-inflammatory mediators is already altered, UfCP exposure aggravates the inflammation and the increase in anti-inflammatory, pro-resolving lipid mediators is insufficient to counterbalance the extensive inflammatory response. This may be a contributing mechanism that explains the increased susceptibility of asthmatic patients towards particle exposure.
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Affiliation(s)
- Ingrid Beck-Speier
- Institute of Allergy Research, Helmholtz Zentrum/Technische Universität München, Helmholtz Zentrum München, German
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27
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Tsao PN, Wei SC, Wu MF, Huang MT, Lin HY, Lee MC, Lin KMC, Wang IJ, Kaartinen V, Yang LT, Cardoso WV. Notch signaling prevents mucous metaplasia in mouse conducting airways during postnatal development. Development 2011; 138:3533-43. [PMID: 21791528 PMCID: PMC3148592 DOI: 10.1242/dev.063727] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/09/2011] [Indexed: 01/03/2023]
Abstract
Goblet cell metaplasia and mucus overproduction contribute to the pathogenesis of chronic lung diseases, including asthma and chronic obstructive pulmonary disease (COPD). Notch signaling regulates cell fate decisions and is crucial in controlling goblet cell differentiation in the gut epithelium. Little is known, however, about how endogenous Notch signaling influences the goblet cell differentiation program that takes place in the postnatal lung. Using a combination of genetic and in vitro approaches here we provide evidence of a novel role for Notch in restricting goblet cell differentiation in the airway epithelium during the postnatal period. Conditional inactivation of the essential Notch pathway component Pofut1 (protein O-fucosyltransferase1) in Tgfb3-Cre-expressing mice resulted in an aberrant postnatal airway phenotype characterized by marked goblet cell metaplasia, decreased Clara cell number and increase in ciliated cells. The presence of the same phenotype in mice in which the Notch transcriptional effector Rbpjk was deleted indicated the involvement of the canonical Notch pathway. Lineage study in vivo suggested that goblet cells originated from a subpopulation of Clara cells largely present in proximal airways in which Notch was disrupted. The phenotype was confirmed by a panel of goblet cell markers, showed no changes in cell proliferation or altered expression of proinflammatory cytokines and was associated with significant downregulation of the bHLH transcriptional repressor Hes5. Luciferase reporter analysis suggested that Notch directly repressed MUC5AC transcription in lung epithelial cells. The data suggested that during postnatal life Notch is required to prevent Clara cells from differentiating into goblet cells.
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Affiliation(s)
- Po-Nien Tsao
- Department of Pediatrics, National Taiwan University Hospital, Taipei 100, Taiwan
- The Research Center of Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei 10048, Taiwan
| | - Shu-Chen Wei
- Department of Internal Medicine, National Taiwan University Hospital, Taipei 100, Taiwan
| | - Ming-Fang Wu
- Animal Medical Center, College of Medicine, National Taiwan University, Taipei 106, Taiwan
| | - Miao-Tzu Huang
- Department of Medical Research, National Taiwan University Hospital, Taipei 10002, Taiwan
| | - Hsien-Yi Lin
- Institute of Cellular and Systems Medicine, National Health Research Institutes, Zhunan Town, Miaoli County 35053, Taiwan
| | - Ming-Cheng Lee
- Department of Internal Medicine, National Taiwan University Hospital, Taipei 100, Taiwan
| | - Kurt Ming-Chao Lin
- Division of Medical Engineering, National Health Research Institutes, Zhunan Town, Miaoli County 35053, Taiwan
| | - I-Jong Wang
- Department of Ophthalmology, National Taiwan University Hospital, Taipei 100, Taiwan
| | - Vesa Kaartinen
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA
| | - Liang-Tung Yang
- Institute of Cellular and Systems Medicine, National Health Research Institutes, Zhunan Town, Miaoli County 35053, Taiwan
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