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Morin L, Lecureur V, Lescoat A. Results from omic approaches in rat or mouse models exposed to inhaled crystalline silica: a systematic review. Part Fibre Toxicol 2024; 21:10. [PMID: 38429797 PMCID: PMC10905840 DOI: 10.1186/s12989-024-00573-x] [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: 11/23/2022] [Accepted: 02/26/2024] [Indexed: 03/03/2024] Open
Abstract
BACKGROUND Crystalline silica (cSiO2) is a mineral found in rocks; workers from the construction or denim industries are particularly exposed to cSiO2 through inhalation. cSiO2 inhalation increases the risk of silicosis and systemic autoimmune diseases. Inhaled cSiO2 microparticles can reach the alveoli where they induce inflammation, cell death, auto-immunity and fibrosis but the specific molecular pathways involved in these cSiO2 effects remain unclear. This systematic review aims to provide a comprehensive state of the art on omic approaches and exposure models used to study the effects of inhaled cSiO2 in mice and rats and to highlight key results from omic data in rodents also validated in human. METHODS The protocol of systematic review follows PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. Eligible articles were identified in PubMed, Embase and Web of Science. The search strategy included original articles published after 1990 and written in English which included mouse or rat models exposed to cSiO2 and utilized omic approaches to identify pathways modulated by cSiO2. Data were extracted and quality assessment was based on the SYRCLE's Risk of Bias tool for animal studies. RESULTS Rats and male rodents were the more used models while female rodents and autoimmune prone models were less studied. Exposure of animals were both acute and chronic and the timing of outcome measurement through omics approaches were homogeneously distributed. Transcriptomic techniques were more commonly performed while proteomic, metabolomic and single-cell omic methods were less utilized. Immunity and inflammation were the main domains modified by cSiO2 exposure in lungs of mice and rats. Less than 20% of the results obtained in rodents were finally verified in humans. CONCLUSION Omic technics offer new insights on the effects of cSiO2 exposure in mice and rats although the majority of data still need to be validated in humans. Autoimmune prone model should be better characterised and systemic effects of cSiO2 need to be further studied to better understand cSiO2-induced autoimmunity. Single-cell omics should be performed to inform on pathological processes induced by cSiO2 exposure.
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Affiliation(s)
- Laura Morin
- Univ Rennes, CHU Rennes, INSERM, EHESP, IRSET (Institut de recherche en sante, environnement et travail), UMR_S 1085, 35000, Rennes, France
| | - Valérie Lecureur
- Univ Rennes, CHU Rennes, INSERM, EHESP, IRSET (Institut de recherche en sante, environnement et travail), UMR_S 1085, 35000, Rennes, France.
| | - Alain Lescoat
- Univ Rennes, CHU Rennes, INSERM, EHESP, IRSET (Institut de recherche en sante, environnement et travail), UMR_S 1085, 35000, Rennes, France
- Department of Internal Medicine, Rennes University Hospital, 35000, Rennes, France
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Karpenko MN, Muruzheva ZM, Ilyechova EY, Babich PS, Puchkova LV. Abnormalities in Copper Status Associated with an Elevated Risk of Parkinson's Phenotype Development. Antioxidants (Basel) 2023; 12:1654. [PMID: 37759957 PMCID: PMC10525645 DOI: 10.3390/antiox12091654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/10/2023] [Accepted: 08/16/2023] [Indexed: 09/29/2023] Open
Abstract
In the last 15 years, among the many reasons given for the development of idiopathic forms of Parkinson's disease (PD), copper imbalance has been identified as a factor, and PD is often referred to as a copper-mediated disorder. More than 640 papers have been devoted to the relationship between PD and copper status in the blood, which include the following markers: total copper concentration, enzymatic ceruloplasmin (Cp) concentration, Cp protein level, and non-ceruloplasmin copper level. Most studies measure only one of these markers. Therefore, the existence of a correlation between copper status and the development of PD is still debated. Based on data from the published literature, meta-analysis, and our own research, it is clear that there is a connection between the development of PD symptoms and the number of copper atoms, which are weakly associated with the ceruloplasmin molecule. In this work, the link between the risk of developing PD and various inborn errors related to copper metabolism, leading to decreased levels of oxidase ceruloplasmin in the circulation and cerebrospinal fluid, is discussed.
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Affiliation(s)
- Marina N. Karpenko
- I.P. Pavlov Department of Physiology, Research Institute of Experimental Medicine, 197376 St. Petersburg, Russia; (M.N.K.); (Z.M.M.)
- Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia;
| | - Zamira M. Muruzheva
- I.P. Pavlov Department of Physiology, Research Institute of Experimental Medicine, 197376 St. Petersburg, Russia; (M.N.K.); (Z.M.M.)
- State Budgetary Institution of Health Care “Leningrad Regional Clinical Hospital”, 194291 St. Petersburg, Russia
| | - Ekaterina Yu. Ilyechova
- Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia;
- Research Center of Advanced Functional Materials and Laser Communication Systems, ADTS Institute, ITMO University, 197101 St. Petersburg, Russia
- Department of Molecular Genetics, Research Institute of Experimental Medicine, 197376 St. Petersburg, Russia
| | - Polina S. Babich
- Department of Zoology and Genetics, Faculty of Biology, Herzen State Pedagogical University of Russia, 191186 St. Petersburg, Russia;
| | - Ludmila V. Puchkova
- Institute of Biomedical Systems and Biotechnology, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia;
- Research Center of Advanced Functional Materials and Laser Communication Systems, ADTS Institute, ITMO University, 197101 St. Petersburg, Russia
- Department of Molecular Genetics, Research Institute of Experimental Medicine, 197376 St. Petersburg, Russia
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Zhang J, Hu W, Liu K, Liu J, Zheng Y, Sun X, Mei L, Qian Z, Sun Q, Liu Q, Wu Z, Zhang H, Li Y, Sun D, Ye M. Integrated mRNA and microRNA profiling in lung tissue and blood from human silicosis. J Gene Med 2023:e3518. [PMID: 37403412 DOI: 10.1002/jgm.3518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 04/04/2023] [Accepted: 04/10/2023] [Indexed: 07/06/2023] Open
Abstract
BACKGROUND The overwhelming majority of subjects in the current silicosis mRNA and microRNA (miRNA) expression profile are of human blood, lung cells or a rat model, which puts limits on the understanding of silicosis pathogenesis and therapy. To address the limitations, our investigation was focused on differentially expressed mRNA and miRNA profiles in lung tissue from silicosis patients to explore potential biomarker for early detection of silicosis. METHODS A transcriptome study was conducted based on lung tissue from 15 silicosis patients and eight normal people, and blood samples from 404 silicosis patients and 177 normal people. Three early stage silicosis, five advanced silicosis and four normal lung tissues were randomly selected for microarray processing and analyze. The differentially expressed mRNAs were further used to conduct Gene Ontology and pathway analyses. Series test of cluster was performed to explore possible changes in differentially expressed mRNA and miRNA expression patterns during the process of silicosis. The blood samples and remaining lung tissues were used in a quantitative real-time PCR (RT-qPCR) (RT-qPCR). RESULTS In total, 1417 and 241 differentially expressed mRNAs and miRNAs were identified between lung tissue from silicosis patients and normal people (p < 0.05). However, there was no significant difference in most mRNA or miRNA expression between early stage and advanced stage silicosis lung tissues. RT-qPCR validation results in lung tissues showed expression of four mRNAs (HIF1A, SOCS3, GNAI3 and PTEN) and seven miRNAs was significantly down-regulated compared to those of control group. Nevertheless, PTEN and GNAI3 expression was significantly up-regulated (p < 0.001) in blood samples. The bisulfite sequencing PCR demonstrated that PTEN had significantly decreased the methylation rate in blood samples of silicosis patients. CONCLUSIONS PTEN might be a potential biomarker for silicosis as a result of low methylation in the blood.
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Affiliation(s)
- Jingbo Zhang
- Clinical Research Center of Occupational Diseases, The Affiliated Shanghai Pulmonary Hospital of Tongji University School of Medicine, Shanghai, China
| | - Weijiang Hu
- National Institute for Occupation Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Kai Liu
- National Institute for Occupation Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Jie Liu
- Department of Occupational Disease, Suzhou No. 5 People's Hospital, Suzhou, China
| | - Yuxin Zheng
- School of Public Health, Qingdao University, Qingdao, China
| | - Xin Sun
- National Institute for Occupation Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Liangying Mei
- Institute of Occupational Disease Prevention, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
| | - Zushu Qian
- Department of Public Administration, Huangshi Center for Disease Control and Prevention, Huangshi, China
| | - Qiangguo Sun
- Occupation Disease Prevention and Control Center Section, Huangshi Center for Disease Control and Prevention, Huangshi, China
| | - Qiang Liu
- Department of Enviromental Health, Suzhou Center for Disease Control and Prevention, Suzhou, China
| | - Zhijun Wu
- National Institute for Occupation Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Hengdong Zhang
- Institute of Occupational Disease Prevention, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China
| | - Yanping Li
- Department of Respiratory Medicine, Honghe Prefecture Third People's Hospital, Honghe, China
| | - Daoyuan Sun
- Clinical Research Center of Occupational Diseases, The Affiliated Shanghai Pulmonary Hospital of Tongji University School of Medicine, Shanghai, China
| | - Meng Ye
- National Institute for Occupation Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
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Yin H, Xie Y, Gu P, Li W, Zhang Y, Yao Y, Chen W, Ma J. The emerging role of epigenetic regulation in the progression of silicosis. Clin Epigenetics 2022; 14:169. [PMID: 36494831 PMCID: PMC9737765 DOI: 10.1186/s13148-022-01391-8] [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: 08/04/2022] [Accepted: 11/30/2022] [Indexed: 12/13/2022] Open
Abstract
Silicosis is one of the most severe occupational diseases worldwide and is characterized by silicon nodules and diffuse pulmonary fibrosis. However, specific treatments for silicosis are still lacking at present. Therefore, elucidating the pathogenesis of silicosis plays a significant guiding role for its treatment and prevention. The occurrence and development of silicosis are accompanied by many regulatory mechanisms, including epigenetic regulation. The main epigenetic regulatory mechanisms of silicosis include DNA methylation, non-coding RNA (ncRNA), and histone modifications. In recent years, the expression and regulation of genes related to silicosis have been explored at epigenetic level to reveal its pathogenesis further, and the identification of aberrant epigenetic markers provides new biomarkers for prediction and diagnosis of silicosis. Here, we summarize the studies on the role of epigenetic changes in the pathogenesis of silicosis to give some clues for finding specific therapeutic targets for silicosis.
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Affiliation(s)
- Haoyu Yin
- grid.33199.310000 0004 0368 7223Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China ,grid.33199.310000 0004 0368 7223Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
| | - Yujia Xie
- grid.33199.310000 0004 0368 7223Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China ,grid.33199.310000 0004 0368 7223Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
| | - Pei Gu
- grid.33199.310000 0004 0368 7223Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China ,grid.33199.310000 0004 0368 7223Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
| | - Wei Li
- grid.417303.20000 0000 9927 0537Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, 221004 Jiangsu China
| | - Yingdie Zhang
- grid.33199.310000 0004 0368 7223Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China ,grid.33199.310000 0004 0368 7223Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
| | - Yuxin Yao
- grid.33199.310000 0004 0368 7223Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China ,grid.33199.310000 0004 0368 7223Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
| | - Weihong Chen
- grid.33199.310000 0004 0368 7223Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China ,grid.33199.310000 0004 0368 7223Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
| | - Jixuan Ma
- grid.33199.310000 0004 0368 7223Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China ,grid.33199.310000 0004 0368 7223Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 Hubei China
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Li Y, Cheng Z, Fan H, Hao C, Yao W. Epigenetic Changes and Functions in Pneumoconiosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:2523066. [PMID: 35096264 PMCID: PMC8794660 DOI: 10.1155/2022/2523066] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 12/23/2021] [Indexed: 11/21/2022]
Abstract
Pneumoconiosis is one of the most common occupational diseases in the world, and specific treatment methods of pneumoconiosis are lacking at present, so it carries great social and economic burdens. Pneumoconiosis, coronavirus disease 2019, and idiopathic pulmonary fibrosis all have similar typical pathological changes-pulmonary fibrosis. Pulmonary fibrosis is a chronic lung disease characterized by excessive deposition of the extracellular matrix and remodeling of the lung tissue structure. Clarifying the pathogenesis of pneumoconiosis plays an important guiding role in its treatment. The occurrence and development of pneumoconiosis are accompanied by epigenetic factors (e.g., DNA methylation and noncoding RNA) changes, which in turn can promote or inhibit the process of pneumoconiosis. Here, we summarize epigenetic changes and functions in the several kinds of evidence classification (epidemiological investigation, in vivo, and in vitro experiments) and main types of cells (macrophages, fibroblasts, and alveolar epithelial cells) to provide some clues for finding specific therapeutic targets for pneumoconiosis and even for pulmonary fibrosis.
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Affiliation(s)
- Yiping Li
- Department of Occupational and Environmental Health, College of Public Health, Zhengzhou University, No. 100 Science Avenue, Zhengzhou City, Henan Province, China
| | - Zhiwei Cheng
- Department of Case Management, The Third Affiliated Hospital of Zhengzhou University, China
| | - Hui Fan
- Ultrasonography Department, The Third Affiliated Hospital of Zhengzhou University, China
| | - Changfu Hao
- Department of Child and Adolecence Health, School of Public Health, Zhengzhou University, Henan, 450001, China
| | - Wu Yao
- Department of Occupational and Environmental Health, College of Public Health, Zhengzhou University, No. 100 Science Avenue, Zhengzhou City, Henan Province, China
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Sai L, Qi X, Yu G, Zhang J, Zheng Y, Jia Q, Peng C. Dynamic assessing silica particle-induced pulmonary fibrosis and associated regulation of long non-coding RNA expression in Wistar rats. Genes Environ 2021; 43:23. [PMID: 34130760 PMCID: PMC8204564 DOI: 10.1186/s41021-021-00193-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 05/25/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Exposure to respirable crystalline silica (RCS) can induce accelerated silicosis (AS), a form of silicosis that is more progressive and severe form of silicosis. In this project we aimed to assess processes of silicosis in rats exposed to RCS with focus on the regulation of long noncoding RNAs (lncRNAs). RESULTS The results showed that RCS induced acute inflammatory response as indicated by the appearance of inflammatory cells in the lung from the first day and peaked on day 7 of exposure. The fibroblasts appeared along with the inflammatory cells decreasing gradually on day 14. Extensive fibrosis appeared in the lung tissue, and silicon nodules were getting larger on day 28. Interestingly, the number of altered lncRNAs increased with the exposure time with 193, 424, 455, 421 and 682 lncRNAs on day 1, 7, 14, 21, and 28 after exposure, respectively. We obtained 285 lncRNAs with five significant temporal expression patterns whose expressions might correlate with severity of silicosis. KEGG analysis showed that lncRNAs from short time-series expression miner (STEM)-derived data mainly involved in 17 pathways such as complement and coagulation cascades. CONCLUSIONS The differential expression profiles of lncRNAs may be potential biomarkers in silicosis through modulating expressions of their relevant genes in lungs of rat and thus warrant further investigation.
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Affiliation(s)
- Linlin Sai
- School of Public Health, Qingdao University, 308 Ningxia Road, Qingdao, 266071, Shandong, China. .,Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, 18877 Jingshi Road, Lixia District, Ji'nan, 250062, Shandong, China.
| | - Xuejie Qi
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, 18877 Jingshi Road, Lixia District, Ji'nan, 250062, Shandong, China
| | - Gongchang Yu
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, 18877 Jingshi Road, Lixia District, Ji'nan, 250062, Shandong, China
| | - Juan Zhang
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, 18877 Jingshi Road, Lixia District, Ji'nan, 250062, Shandong, China
| | - Yuxin Zheng
- School of Public Health, Qingdao University, 308 Ningxia Road, Qingdao, 266071, Shandong, China.
| | - Qiang Jia
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, 18877 Jingshi Road, Lixia District, Ji'nan, 250062, Shandong, China.
| | - Cheng Peng
- Queensland Alliance for Environmental Health Science (QAEHS), The University of Queensland, Queensland, Australia
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Choudhari JK, Verma MK, Choubey J, Sahariah BP. Investigation of MicroRNA and transcription factor mediated regulatory network for silicosis using systems biology approach. Sci Rep 2021; 11:1265. [PMID: 33446673 PMCID: PMC7809153 DOI: 10.1038/s41598-020-77636-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 10/19/2020] [Indexed: 02/08/2023] Open
Abstract
Silicosis is a major health issue among workers exposed to crystalline silica. Genetic susceptibility has been implicated in silicosis. The present research demonstrates key regulatory targets and propagated network of gene/miRNA/transcription factor (TF) with interactions responsible for silicosis by integrating publicly available microarray data using a systems biology approach. Array quality is assessed with the Quality Metrics package of Bioconductor, limma package, and the network is constructed using Cytoscape. We observed and enlist 235 differentially expressed genes (DEGs) having up-regulation expression (85 nos) and down-regulation expression (150 nos.) in silicosis; and 24 TFs for the regulation of these DEGs entangled with thousands of miRNAs. Functional enrichment analysis of the DEGs enlighten that, the maximum number of DEGs are responsible for biological process viz, Rab proteins signal transduction (11 nos.) and Cellular Senescence (20 nos.), whereas IL-17 signaling pathway (16 nos.) and Signalling by Nuclear Receptors (14 nos.) etc. are Biological Pathway involving more DEGs. From the identified 1100 high target microRNA (miRNA)s involved in silicosis, 1055 miRNAs are found to relate with down-regulated genes and 847 miRNAs with up-regulated genes. The CDK19 gene (Up-regulated) is associated with 617 miRNAs whereas down-regulated gene ARID5B is regulated by as high as 747 high target miRNAs. In Prediction of Small-molecule signatures, maximum scoring small-molecule combinations for the DEGs have shown that CGP-60774 (with 20 combinations), alvocidib (with 15 combinations) and with AZD-7762 (24 combinations) with few other drugs having the high probability of success.
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Affiliation(s)
- J K Choudhari
- Chhattisgarh Swami Vivekanand Technical University, Bhilai, C.G, 491107, India
- Raipur Institute of Technology, Raipur, C.G, 492001, India
| | - M K Verma
- Chhattisgarh Swami Vivekanand Technical University, Bhilai, C.G, 491107, India
- National Institute of Technology Raipur, Raipur, C.G, 491020, India
| | - J Choubey
- Raipur Institute of Technology, Raipur, C.G, 492001, India
| | - B P Sahariah
- Chhattisgarh Swami Vivekanand Technical University, Bhilai, C.G, 491107, India.
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Shang Y, Liu Q, Wang L, Qiu X, Chen Y, An J. microRNA-146a-5p negatively modulates PM 2.5 caused inflammation in THP-1 cells via autophagy process. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 268:115961. [PMID: 33160737 DOI: 10.1016/j.envpol.2020.115961] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 10/15/2020] [Accepted: 10/27/2020] [Indexed: 06/11/2023]
Abstract
Ambient fine particulate matter (PM2.5) can change the expression profile of microRNAs (miRs), which may play important roles in mediating inflammatory responses. The present study attempts to investigate the roles of miR-146a-5p in regulating cytokine expression in a human monocytic leukemia cell line (THP-1). Four types of PM2.5 extracts obtained from Beijing, China, were subjected to cytotoxic tests in THP-1 cells. These four PM2.5 extracts included two water extracts collected from non-heating and heating season (WN and WH), and two organic extracts from non-heating and heating season (DN and DH). Firstly, the four PM2.5 extracts caused cytotoxicity, oxidative stress responses, cytokine gene expressions and interleukin 8 (IL-8) release in THP-1 cells, with WH showing the highest cytotoxicity, WN showing the highest oxidative stress and inflammatory responses. Additionally, we observed expression of miR-146a-5p was significantly increased, with the maximal response of six folds in WN group. Cellular autophagy was initiated by PM2.5 indicated by related protein and gene expressions. Both RNA interference and autophagy inhibitor were applied to interrupt autophagy process in THP-1 cells. Autophagy dysfunction could alleviate IL-8 expression, suggesting autophagy process regulated cytokine expression and inflammatory response caused by PM2.5. A chemical inhibitor was applied to inhibit the function of miR-146a-5p, and then the expressions of IL-8 and autophagic genes were significantly aggravated. Meanwhile, two target genes of miR-146a-5p, interleukin-1 associated-kinase-1 (IRAK1) and tumor-necrosis factor receptor-associated factor-6 (TRAF6) were increased dramatically, which also played important roles in regulation of autophagy. These data suggested miR-146a-5p negatively modulated cytokine expression caused by PM2.5 via autophagy process through the target genes of IRAK1 and TRAF6. Our findings raised the concerns of the changes of miR expression profile and following responses caused by PM2.5.
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Affiliation(s)
- Yu Shang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Qianyun Liu
- Department of Neurology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China
| | - Lu Wang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Xinghua Qiu
- BIC-ESAT and SKL-ESPC, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
| | - Yingjun Chen
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China
| | - Jing An
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
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Gao X, Xu D, Li S, Wei Z, Li S, Cai W, Mao N, Jin F, Li Y, Yi X, Liu H, Xu H, Yang F. Pulmonary Silicosis Alters MicroRNA Expression in Rat Lung and miR-411-3p Exerts Anti-fibrotic Effects by Inhibiting MRTF-A/SRF Signaling. MOLECULAR THERAPY-NUCLEIC ACIDS 2020; 20:851-865. [PMID: 32464548 PMCID: PMC7256439 DOI: 10.1016/j.omtn.2020.05.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 04/15/2020] [Accepted: 05/06/2020] [Indexed: 02/08/2023]
Abstract
To identify potential therapeutic targets for pulmonary fibrosis induced by silica, we studied the effects of this disease on the expression of microRNAs (miRNAs) in the lung. Rattus norvegicus pulmonary silicosis models were used in conjunction with high-throughput screening of lung specimens to compare the expression of miRNAs in control and pulmonary silicosis tissues. A total of 70 miRNAs were found to be differentially expressed between control and pulmonary silicosis tissues. This included 41 miRNAs that were upregulated and 29 that were downregulated relative to controls. Among them, miR-292-5p, miR-155-3p, miR-1193-3p, miR-411-3p, miR-370-3p, and miR-409a-5p were found to be similarly altered in rat lung and transforming growth factor (TGF)-β1-induced cultured fibroblasts. Using miRNA mimics and inhibitors, we found that miR-1193-3p, miR-411-3p, and miR-370-3p exhibited potent anti-fibrotic effects, while miR-292-5p demonstrated pro-fibrotic effects in TGF-β1-stimulated lung fibroblasts. Moreover, we also found that miR-411-3p effectively reduced pulmonary silicosis in the mouse lung by regulating Mrtfa expression, as demonstrated using biochemical and histological assays. In conclusion, our findings indicate that miRNA expression is perturbed in pulmonary silicosis and suggest that therapeutic interventions targeting specific miRNAs might be effective in the treatment of this occupational disease.
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Affiliation(s)
- Xuemin Gao
- School of Public Health, North China University of Science and Technology, Tangshan, 063210 Hebei, China
| | - Dingjie Xu
- Hebei Key Laboratory for Organ Fibrosis Research, North China University of Science and Technology, Tangshan, 063210 Hebei, China
| | - Shumin Li
- School of Public Health, North China University of Science and Technology, Tangshan, 063210 Hebei, China
| | - Zhongqiu Wei
- Hebei Key Laboratory for Organ Fibrosis Research, North China University of Science and Technology, Tangshan, 063210 Hebei, China
| | - Shifeng Li
- School of Public Health, North China University of Science and Technology, Tangshan, 063210 Hebei, China
| | - Wenchen Cai
- School of Public Health, North China University of Science and Technology, Tangshan, 063210 Hebei, China
| | - Na Mao
- School of Public Health, North China University of Science and Technology, Tangshan, 063210 Hebei, China
| | - Fuyu Jin
- Hebei Key Laboratory for Organ Fibrosis Research, North China University of Science and Technology, Tangshan, 063210 Hebei, China
| | - Yaqian Li
- Hebei Key Laboratory for Organ Fibrosis Research, North China University of Science and Technology, Tangshan, 063210 Hebei, China
| | - Xue Yi
- Department of Basic Medicine, Fujian Collaborative Innovation Center for Accurate Medicine of Respiratory Diseases, Xiamen Medical College, Xiamen, 361023 Fujian, China
| | - Heliang Liu
- School of Public Health, North China University of Science and Technology, Tangshan, 063210 Hebei, China
| | - Hong Xu
- School of Public Health, North China University of Science and Technology, Tangshan, 063210 Hebei, China.
| | - Fang Yang
- School of Public Health, North China University of Science and Technology, Tangshan, 063210 Hebei, China.
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10
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Birkett N, Al-Zoughool M, Bird M, Baan RA, Zielinski J, Krewski D. Overview of biological mechanisms of human carcinogens. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2019; 22:288-359. [PMID: 31631808 DOI: 10.1080/10937404.2019.1643539] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This review summarizes the carcinogenic mechanisms for 109 Group 1 human carcinogens identified as causes of human cancer through Volume 106 of the IARC Monographs. The International Agency for Research on Cancer (IARC) evaluates human, experimental and mechanistic evidence on agents suspected of inducing cancer in humans, using a well-established weight of evidence approach. The monographs provide detailed mechanistic information about all carcinogens. Carcinogens with closely similar mechanisms of action (e.g. agents emitting alpha particles) were combined into groups for the review. A narrative synopsis of the mechanistic profiles for the 86 carcinogens or carcinogen groups is presented, based primarily on information in the IARC monographs, supplemented with a non-systematic review. Most carcinogens included a genotoxic mechanism.
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Affiliation(s)
- Nicholas Birkett
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada
- McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Mustafa Al-Zoughool
- Department of Community and Environmental Health, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Michael Bird
- McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Robert A Baan
- International Agency for Research on Cancer, Lyon, France
| | - Jan Zielinski
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada
- McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Daniel Krewski
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada
- McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, Ottawa, Canada
- Risk Sciences International, Ottawa, Canada
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11
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Regulatory mechanisms of miR-145 expression and the importance of its function in cancer metastasis. Biomed Pharmacother 2018; 109:195-207. [PMID: 30396077 DOI: 10.1016/j.biopha.2018.10.037] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 10/05/2018] [Accepted: 10/09/2018] [Indexed: 02/06/2023] Open
Abstract
MicroRNAs are post-transcriptional mediators of gene expression and regulation, which play influential roles in tumorigenesis and cancer metastasis. The expression of tumor suppressor miR-145 is reduced in various cancer cell lines, containing both solid tumors and blood malignancies. However, the responsible mechanisms of its down-regulation are a complicated network. miR-145 is potentially able to inhbit tumor cell metastasis by targeting of multiple oncogenes, including MUC1, FSCN1, Vimentin, Cadherin, Fibronectin, Metadherin, GOLM1, ARF6, SMAD3, MMP11, Snail1, ZEB1/2, HIF-1α and Rock-1. This distinctive role of miR-145 in the regulation of metastasis-related gene expression may introduce miR-145 as an ideal candidate for controlling of cancer metastasis by miRNA replacement therapy. The present review aims to discuss the current understanding of the different aspects of molecular mechanisms of miR-145 regulation as well as its role in r metastasis regulation.
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12
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Liu L, Wan C, Zhang W, Guan L, Tian G, Zhang F, Ding W. MiR-146a regulates PM 1 -induced inflammation via NF-κB signaling pathway in BEAS-2B cells. ENVIRONMENTAL TOXICOLOGY 2018; 33:743-751. [PMID: 29667303 DOI: 10.1002/tox.22561] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 03/31/2018] [Accepted: 04/01/2018] [Indexed: 06/08/2023]
Abstract
Exposure to particulate matter (PM) leads to kinds of cardiopulmonary diseases, such as asthma, COPD, arrhythmias, lung cancer, etc., which are related to PM-induced inflammation. We have found that PM2.5 (aerodynamics diameter <2.5 µm) exposure induces inflammatory response both in vivo and in vitro. Since the toxicity of PM is tightly associated with its size and components, PM1 (aerodynamics diameter <1.0 µm) is supposed to be more toxic than PM2.5 . However, the mechanism of PM1 -induced inflammation is not clear. Recently, emerging evidences prove that microRNAs play a vital role in regulating inflammation. Therefore, we studied the regulation of miR-146a in PM1 -induced inflammation in human lung bronchial epithelial BEAS-2B cells. The results show that PM1 induces the increase of IL-6 and IL-8 in BEAS-2B cells and up-regulates the miR-146a expression by activating NF-κB signaling pathway. Overexpressed miR-146a prevents the nuclear translocation of p65 through inhibiting the IRAK1/TRAF6 expression, and downregulates the expression of IL-6 and IL-8. Taken together, these results demonstrate that miR-146a can negatively feedback regulate PM1 -induced inflammation via NF-κB signaling pathway in BEAS-2B cells.
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Affiliation(s)
- Limin Liu
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Chong Wan
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Wei Zhang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Longfei Guan
- China-America Institute of Neuroscience, Beijing Luhe Hospital, Capital Medical University, China
| | - Guoxiong Tian
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Fang Zhang
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Wenjun Ding
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
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13
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Huang R, Yu T, Li Y, Hu J. Upregulated has-miR-4516 as a potential biomarker for early diagnosis of dust-induced pulmonary fibrosis in patients with pneumoconiosis. Toxicol Res (Camb) 2018; 7:415-422. [PMID: 30090591 PMCID: PMC6060724 DOI: 10.1039/c8tx00031j] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Accepted: 02/08/2018] [Indexed: 01/12/2023] Open
Abstract
Background: Pulmonary fibrosis (PF) is a representative pathological change in patients with pneumoconiosis; however, due to the absence of reliable and early biomarkers, microRNAs have recently emerged as potential candidates for identification. Objectives: The aim of our study was to discover the potential of PF-specific circulating microRNAs as early biomarkers among patients with pneumoconiosis. Methods: Four dust-exposed patients with PF and four matched healthy individuals (not exposed to dust) were recruited for the study. microRNA profiling was identified by micro-array and bioinformatics methods. Gene Ontology (GO) analysis was used to identify the potential biological or molecular processes modulated by these miRNAs. Kyoto Encyclopedia of Genes and Genomes pathway (KEGG) analysis was used to identify the potentially involved signaling pathways. miRNA-mRNA-binding network analysis was employed to identify genes potentially targeted by the miRNAs. Results: 1079 miRNAs were discovered, of which 406 were up-regulated and 117 were down-regulated in PF patients. 32 miRNAs were up-regulated by >4-fold and 17 miRNAs were down-regulated by >0.5 fold. GO analysis identified the biological processes affected by anatomical structure development, hemophilic cell adhesion and cell-cell adhesion via plasma membrane proteins. Target prediction software showed that serum has-miR-4516 targeted genes encoding basonuclin2, inhibitors of growth family member 4, the potassium voltage-gated channel, and "sha-1-related subfamily member 1" proteins. qRT-PCR revealed that has-miR-4516 was a potential biomarker of PF progression in patients with pneumoconiosis. Conclusions: Our findings suggest that the level of serum miR-4516 may be a potential biomarker for early diagnosis of PF in patients with pneumoconiosis. This is a pilot work that paves the way for a further functional study of the underlying regulatory mechanisms.
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Affiliation(s)
- Ruixue Huang
- Department of occupational and environmental health , Xiangya school of public health , Central South University , 410078 , Changsha , Hunan Province , China . ; ;
| | - Ting Yu
- Department of occupational and environmental health , Xiangya school of public health , Central South University , 410078 , Changsha , Hunan Province , China . ; ;
| | - Ying Li
- Hunan Prevention and Treatment Center For Occupational Diseases , Changsha , China .
| | - Jianan Hu
- Department of occupational and environmental health , Xiangya school of public health , Central South University , 410078 , Changsha , Hunan Province , China . ; ;
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14
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Bronchoalveolar Lavage Fluid microRNA-146a: A Biomarker of Disease Severity and Pulmonary Function in Patients With Silicosis. J Occup Environ Med 2018; 58:e177-82. [PMID: 27158964 DOI: 10.1097/jom.0000000000000719] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To examine the impact of microRNA-146a (miR-146a) on pulmonary function and disease severity in silicosis patients. METHODS Twenty-nine silicosis patients and six observation subjects were recruited. MiR-146a expression level was detected by qRT-PCR, and pulmonary function was assessed with a spirometer. RESULTS MiR-146a expression level was higher in silicosis patients than in observation subjects, and the probability of suffering from silicosis increased with increasing miR-146a level. MiR-146a was associated with the severity of silicosis. As the miR-146a increased, the probability of suffering from silicosis increased for stage I patients, and for stage II & III patients, the probability first increased and then decreased. MiR-146a was also associated with decreased pulmonary function measures, pulmonary function impairment, and restrictive ventilator dysfunction. CONCLUSIONS miR-146a was significantly associated with the disease severity and pulmonary function of silicosis.
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15
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Liu Y, Xu H, Geng Y, Xu D, Zhang L, Yang Y, Wei Z, Zhang B, Li S, Gao X, Wang R, Zhang X, Brann D, Yang F. Dibutyryl-cAMP attenuates pulmonary fibrosis by blocking myofibroblast differentiation via PKA/CREB/CBP signaling in rats with silicosis. Respir Res 2017; 18:38. [PMID: 28222740 PMCID: PMC5320641 DOI: 10.1186/s12931-017-0523-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 02/16/2017] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Myofibroblasts play a major role in the synthesis of extracellular matrix (ECM) and the stimulation of these cells is thought to play an important role in the development of silicosis. The present study was undertaken to investigate the anti-fibrotic effects of dibutyryl-cAMP (db-cAMP) on rats induced by silica. METHODS A HOPE MED 8050 exposure control apparatus was used to create the silicosis model. Rats were randomly divided into 4 groups: 1)controls for 16 w; 2)silicosis for 16 w; 3)db-cAMP pre-treatment; 4) db-cAMP post-treatment. Rat pulmonary fibroblasts were cultured in vitro and divided into 4 groups as follows: 1) controls; 2) 10-7mol/L angiotensin II (Ang II); 3) Ang II +10-4 mol/L db-cAMP; and 4) Ang II + db-cAMP+ 10-6 mol/L H89. Hematoxylin-eosin (HE), Van Gieson staining and immunohistochemistry (IHC) were performed to observe the histomorphology of lung tissue. The levels of cAMP were detected by enzyme immunoassay. Double-labeling for α-SMA with Gαi3, protein kinase A (PKA), phosphorylated cAMP-response element-binding protein (p-CREB), and p-Smad2/3 was identified by immunofluorescence staining. Protein levels were detected by Western blot analysis. The interaction between CREB-binding protein (CBP) and Smad2/3 and p-CREB were measured by co-immunoprecipitation (Co-IP). RESULTS Db-cAMP treatment reduced the number and size of silicosis nodules, inhibited myofibroblast differentiation, and extracellular matrix deposition in vitro and in vivo. In addition, db-cAMP regulated Gαs protein and inhibited expression of Gαi protein, which increased endogenous cAMP. Db-cAMP increased phosphorylated cAMP-response element-binding protein (p-CREB) via protein kinase A (PKA) signaling, and decreased nuclear p-Smad2/3 binding with CREB binding protein (CBP), which reduced activation of p-Smads in fibroblasts induced by Ang II. CONCLUSIONS This study showed an anti-silicotic effect of db-cAMP that was mediated via PKA/p-CREB/CBP signaling. Furthermore, the findings offer novel insight into the potential use of cAMP signaling for therapeutic strategies to treat silicosis.
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Affiliation(s)
- Yan Liu
- Basic Medical College, Hebei Medical University, No. 361 Zhongshan Road, Shijiazhuang city, Hebei province, China
| | - Hong Xu
- Medical Research Center, North China University of Science and Technology, Tangshan, Hebei, 063009, China
| | - Yucong Geng
- Medical Research Center, North China University of Science and Technology, Tangshan, Hebei, 063009, China
| | - Dingjie Xu
- Traditional Chinese Medicine College, North China University of Science and Technology, Tangshan, Hebei, 063009, China
| | - Lijuan Zhang
- Medical Research Center, North China University of Science and Technology, Tangshan, Hebei, 063009, China
| | - Yi Yang
- Medical Research Center, North China University of Science and Technology, Tangshan, Hebei, 063009, China
| | - Zhongqiu Wei
- Basic Medical College, North China University of Science and Technology, Tangshan, Hebei, 063009, China
| | - Bonan Zhang
- Basic Medical College, North China University of Science and Technology, Tangshan, Hebei, 063009, China
| | - Shifeng Li
- Medical Research Center, North China University of Science and Technology, Tangshan, Hebei, 063009, China
| | - Xuemin Gao
- Medical Research Center, North China University of Science and Technology, Tangshan, Hebei, 063009, China
| | - Ruimin Wang
- Medical Research Center, North China University of Science and Technology, Tangshan, Hebei, 063009, China
| | - Xianghong Zhang
- Basic Medical College, Hebei Medical University, No. 361 Zhongshan Road, Shijiazhuang city, Hebei province, China
| | - Darrell Brann
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Fang Yang
- Basic Medical College, Hebei Medical University, No. 361 Zhongshan Road, Shijiazhuang city, Hebei province, China.
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16
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Ng CT, Li JJ, Balasubramanian SK, You F, Yung LYL, Bay BH. Inflammatory Changes in Lung Tissues Associated with Altered Inflammation-Related MicroRNA Expression after Intravenous Administration of Gold Nanoparticles in Vivo. ACS Biomater Sci Eng 2016; 2:1959-1967. [PMID: 33440531 DOI: 10.1021/acsbiomaterials.6b00358] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Potential adverse effects of gold nanoparticles (AuNPs) are gaining attention due to their wide industrial, consumer, and biomedical applications. This may give rise to possible health risks from direct exposure to the NPs. Excessive inflammatory response is known to be one of the main effects induced by NPs. In this study, inflammatory and miRNA expression changes in lung tissues were evaluated in rats following intravenous administration of AuNPs. AuNPs (20 nm) at a mass concentration of 256 μg/mL were intravenously injected into 6-8 week old male Wistar rats at single doses of 0.025, 0.05, 0.1, and 0.2 mg/kg and sacrificed at 1 week, 1 month, and 2 months, respectively. The biodistribution of AuNPs in the lungs of the rats was determined by inductively coupled plasma mass spectrometry. There were no apparent changes observed in the body weight of the experimental rats. Histopathological examination revealed the presence of infiltrating lymphocytes in lung interstitial tissues and enhanced IL-1α immunostaining in the lung tissues. Out of 84 rat microRNAs (miRNAs) analyzed, the expression of three miRNAs in rat lungs were dysregulated by more than 2-fold in the 0.1 and 0.2 mg/kg AuNP-treated rats 1 week after exposure. In particular, miR-327 was significantly down-regulated in both groups of treated rats. Taken together, it would seem that miRNAs may regulate inflammatory changes in the lungs after exposure to AuNPs in vivo.
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Affiliation(s)
- Cheng-Teng Ng
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
| | - Jia'En Jasmine Li
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore.,Department of Chemical & Biomolecular Engineering, Faculty of Engineering, National University of Singapore, Singapore 117585, Singapore
| | - Suresh Kumar Balasubramanian
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
| | - Fang You
- Department of Chemical & Biomolecular Engineering, Faculty of Engineering, National University of Singapore, Singapore 117585, Singapore
| | - Lin-Yue Lanry Yung
- Department of Chemical & Biomolecular Engineering, Faculty of Engineering, National University of Singapore, Singapore 117585, Singapore
| | - Boon-Huat Bay
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
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17
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ZHANG Y, WANG F, ZHOU D, REN X, ZHOU D, GAO X, LAN Y, ZHANG Q, XIE X. Genome-wide analysis of aberrantly expressed microRNAs in bronchoalveolar lavage fluid from patients with silicosis. INDUSTRIAL HEALTH 2016; 54:361-9. [PMID: 26903263 PMCID: PMC4963549 DOI: 10.2486/indhealth.2015-0170] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Background To identify differentially expressed miRNAs profiles in bronchoalveolar lavage fluid (BALF) from patients with silicosis and consider the potential contribution of miRNAs to silicosis.Methods miRNAs expression profiling were performed in the cell fraction of BALF samples obtained from 9 subjects (3 silicosis observation subjects, 3 stage I and stage II silicosis patients, respectively). The differential expression of two selected miRNAs hsa-miR-181c-5p and hsa-miR-29a-3p were confirmed by RT-qPCR. Furthermore, miRNAs Gene Ontology Enrichment categories and target mRNAs were determined based on miRWalk.Results We found 110 dysregulated miRNAs in silicosis samples, most of which showed a down-regulation trend. Microarray results were confirmed by RT-qPCR. With the observation group samples set as standards, stage I samples showed 123 differentially expressed miRNAs, and stage II 46. 23 miRNAs were dysregulated in both stages. Finally, functional enrichment analysis indicated that these miRNAs played an important role in various biological processes, including ECM-receptor interaction and endocytosis.Conclusions This is the first time to acquire the BALF-derived microRNAs expression profiling targeting to human silicosis. These results contribute to unravelling miRNAs involved in the pathogenesis of silicosis, and provide new tools of potential use of as biomarkers for diagnosis and/or therapeutic purposes.
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Affiliation(s)
- Yang ZHANG
- Department of Occupational and Environmental Medicine, West China School of Public Health, Sichuan University, China
| | - Faxuan WANG
- Department of Occupational and Environmental Medicine, School of Public Health, Ningxia Medical University, China
| | - Dingzi ZHOU
- Department of Occupational Diseases, No. 4 West China Teaching Hospital, Sichuan University, China
| | - Xiaohui REN
- Department of Industrial Hygiene, 903 Hospital of China Academy of Engineering Physics, China
| | - Dinglun ZHOU
- Department of Occupational and Environmental Medicine, West China School of Public Health, Sichuan University, China
| | - Xiaosi GAO
- Department of Occupational Diseases, No. 4 West China Teaching Hospital, Sichuan University, China
| | - Yajia LAN
- Department of Occupational and Environmental Medicine, West China School of Public Health, Sichuan University, China
| | - Qin ZHANG
- Department of Occupational and Environmental Medicine, West China School of Public Health, Sichuan University, China
- To whom correspondence should be addressed. *E-mail:
| | - Xiaoqi XIE
- Department of Critical Care Medicine, West China Hospital, Sichuan University, China
- **E-mail:
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18
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Yang Z, Li Q, Yao S, Zhang G, Xue R, Li G, Wang Y, Wang S, Wu R, Gao H. Down-Regulation of miR-19a as a Biomarker for Early Detection of Silicosis. Anat Rec (Hoboken) 2016; 299:1300-7. [PMID: 27312312 DOI: 10.1002/ar.23381] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 03/30/2016] [Accepted: 04/16/2016] [Indexed: 12/19/2022]
Abstract
The accumulated data indicate that there is significant genetic heterogeneity underlying the etiology of silicosis. Recent reports have revealed that microRNAs (miRNAs) play an important role in regulating pulmonary fibrosis. This study, therefore, aimed to identify some miRNAs as biomarkers for silicosis, and to explore the early diagnostic value of biomarkers for silicosis. Total RNAs were collected from the peripheral blood leukocytes of 23 silicosis patients and 23 healthy controls, the different miRNAs were screened using microarrays. The potential biomarker miRNAs were identified by quantitative real-time polymerase chain reaction (qPCR) and receiver operating characteristic (ROC) curves. Eighteen differential miRNAs in leukocytes were up-regulated and twenty differential miRNAs were down-regulated in the silicosis group, compared with the control group. The expression levels of miR-181a and miR-19a were 0.8854 ± 0.1037 and 0.2929 ± 0.0342 by the relative quantitation method 2(-△△CT) of qPCR, respectively. The sensitivity and specificity for miR-181a at a cut-off value of 1.8917 were 70% and 75%, respectively, whereas, those for miR-19a at a cut-off value of 3.6828 were 95% and 95%, respectively. Thus, miR-19a in peripheral blood leukocyte could be used as an effective biomarker for silicosis. Anat Rec, 299:1300-1307, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Zhen Yang
- Tianjin Key Laboratory for Prevention and Control of Occupational and Environmental Hazard, No. 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China.,Institute of Medical Equipment, Academy of Military Medical Sciences of Chinese People's Libration Army, 106 Wan Dong Road, Hedong District, Tianjin, 300163, China.,Department of Hygiene, Logistics College of Chinese People's Armed Police Forces, 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China
| | - Qian Li
- Tianjin Key Laboratory for Prevention and Control of Occupational and Environmental Hazard, No. 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China
| | - Sanqiao Yao
- School of Public Health, Xinxiang Medical University, 601 Jinsui Road, Hongqi District, Henan, 453003, China
| | - Ge Zhang
- Tianjin Key Laboratory for Prevention and Control of Occupational and Environmental Hazard, No. 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China
| | - Rong Xue
- Tianjin Key Laboratory for Prevention and Control of Occupational and Environmental Hazard, No. 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China
| | - Guoliang Li
- Tianjin Key Laboratory for Prevention and Control of Occupational and Environmental Hazard, No. 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China.,Department of Hygiene, Logistics College of Chinese People's Armed Police Forces, 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China
| | - Yizheng Wang
- Tianjin Key Laboratory for Prevention and Control of Occupational and Environmental Hazard, No. 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China.,Department of Hygiene, Logistics College of Chinese People's Armed Police Forces, 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China
| | - Shixin Wang
- Tianjin Key Laboratory for Prevention and Control of Occupational and Environmental Hazard, No. 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China
| | - Ruichang Wu
- Institute of Medical Equipment, Academy of Military Medical Sciences of Chinese People's Libration Army, 106 Wan Dong Road, Hedong District, Tianjin, 300163, China
| | - Hongsheng Gao
- Tianjin Key Laboratory for Prevention and Control of Occupational and Environmental Hazard, No. 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China.,Department of Hygiene, Logistics College of Chinese People's Armed Police Forces, 1 Huizhihuan Road, Dongli District, Tianjin, 300309, China
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19
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Antognelli C, Gambelunghe A, Muzi G, Talesa VN. Glyoxalase I drives epithelial-to-mesenchymal transition via argpyrimidine-modified Hsp70, miR-21 and SMAD signalling in human bronchial cells BEAS-2B chronically exposed to crystalline silica Min-U-Sil 5: Transformation into a neoplastic-like phenotype. Free Radic Biol Med 2016; 92:110-125. [PMID: 26784015 DOI: 10.1016/j.freeradbiomed.2016.01.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 01/12/2016] [Accepted: 01/13/2016] [Indexed: 12/15/2022]
Abstract
Glyoxalase I (Glo1) is the main scavenging enzyme of methylglyoxal (MG), a potent precursor of advanced glycation end products (AGEs). AGEs are known to control multiple biological processes, including epithelial to mesenchymal transition (EMT), a multistep phenomenon associated with cell transformation, playing a major role in a variety of diseases, including cancer. Crystalline silica is a well-known occupational health hazard, responsible for a great number of human pulmonary diseases, such as silicosis. There is still much debate concerning the carcinogenic role of crystalline silica, mainly due to the lack of a causal demonstration between silica exposure and carcinogenesis. It has been suggested that EMT might play a role in crystalline silica-induced lung neoplastic transformation. The aim of this study was to investigate whether, and by means of which mechanism, the antiglycation defence Glo1 is involved in Min-U-Sil 5 (MS5) crystalline silica-induced EMT in BEAS-2B human bronchial epithelial cells chronically exposed, and whether this is associated with the beginning of a neoplastic-like transformation process. By using gene silencing/overexpression and scavenging/inhibitory agents, we demonstrated that MS5 induced hydrogen peroxide-mediated c-Jun-dependent Glo1 up-regulation which resulted in a decrease in the Argpyrimidine-modified Hsp70 protein level which triggered EMT in a novel mechanism involving miR-21 and SMAD signalling. The observed EMT was associated with a neoplastic-like phenotype. The results obtained provide a causal in vitro demonstration of the MS5 pro-carcinogenic transforming role and more importantly they provide new insights into the mechanisms involved in this process, thus opening new paths in research concerning the in vivo study of the carcinogenic potential of crystalline silica.
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Affiliation(s)
- Cinzia Antognelli
- Department of Experimental Medicine, School of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy.
| | - Angela Gambelunghe
- Department of Medicine, School of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy.
| | - Giacomo Muzi
- Department of Medicine, School of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy.
| | - Vincenzo Nicola Talesa
- Department of Experimental Medicine, School of Medicine and Surgery, University of Perugia, Piazzale L. Severi 1, 06129 Perugia, Italy.
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20
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Zhang Y, Wang F, Lan Y, Zhou D, Ren X, Zhao L, Zhang Q. Roles of microRNA-146a and microRNA-181b in regulating the secretion of tumor necrosis factor-α and interleukin-1β in silicon dioxide-induced NR8383 rat macrophages. Mol Med Rep 2015; 12:5587-93. [PMID: 26239160 PMCID: PMC4581828 DOI: 10.3892/mmr.2015.4083] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 06/22/2015] [Indexed: 11/06/2022] Open
Abstract
Despite increasing evidence to suggest that microRNA (miR)-146a and miR-181b are involved in the regulation of immune responses and tumor progression, their roles in silicosis remain to be fully elucidated. Therefore, the present study examined the roles of miR-146a and miR-181b in inflammatory responses, and their effect on the expression of the tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) inflammatory chemokines in silicon dioxide (SiO2)-induced NR8383 rat macrophages. Alterations in the expression levels of miR-146a and miR-181b in rats with silicosis have been previously investigated using miRNA arrays. In the present study, the expression levels of miR-146a and miR-181b were assessed using reverse transcription-quantitative polymerase chain reaction (RT-qPCR). The NR8383 cells were transfected with miRNA-146a and miR-181b mimics or inhibitors, and the cells and culture supernatants were collected following SiO2 treatment for 12 h. The expression levels of TNF-α and IL-1β were detected using western blotting, RT-qPCR and ELISA. Analysis of variance and Student's two-tailed t-test were used to perform statistical analyses. The expression level of miR-146a was significantly increased, while the expression level of miR-181b was significantly decreased in the fibrotic lungs of the rats with silicosis, compared with the levels in the normal rats. It was observed that, following treatment of the NR8383 cells with SiO2 for 12 h, the levels of TNF-α were significantly increased following miR-181b knockdown and the levels of IL-1β were significantly increased following miR-146a knockdown, compared with the inhibitor-treated controls (P<0.05). By contrast, miR-181b mimic transfection led to a significant reduction in the levels of TNF-α (P<0.05), and miR-146a mimics were responsible for the decrease in IL-1β (P<0.05). The results of the present study provide evidence supporting the roles of miR-146a and miR-181b in the pathogenesis of silicosis, and suggest that they may be candidate therapeutic target in this disease.
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Affiliation(s)
- Yang Zhang
- Department of Occupational and Environmental Medicine, West China School of Public Health, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Faxuan Wang
- Department of Occupational and Environmental Medicine, School of Public Health, Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Yajia Lan
- Department of Occupational and Environmental Medicine, West China School of Public Health, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Dinglun Zhou
- Department of Occupational and Environmental Medicine, West China School of Public Health, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xiaohui Ren
- Department of Industrial Hygiene, 903 Hospital of China Academy of Engineering Physics, Mianyang, Sichuan 621900, P.R. China
| | - Liqiang Zhao
- Department of Occupational Disease, No. 4 West China Teaching Hospital, Sichuan University, Chengdu, Sichuan 610065, P.R. China
| | - Qin Zhang
- Department of Occupational and Environmental Medicine, West China School of Public Health, Sichuan University, Chengdu, Sichuan 610041, P.R. China
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Antognelli C, Gambelunghe A, Muzi G, Talesa VN. Peroxynitrite-mediated glyoxalase I epigenetic inhibition drives apoptosis in airway epithelial cells exposed to crystalline silica via a novel mechanism involving argpyrimidine-modified Hsp70, JNK, and NF-κB. Free Radic Biol Med 2015; 84:128-141. [PMID: 25841781 DOI: 10.1016/j.freeradbiomed.2015.03.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Revised: 03/18/2015] [Accepted: 03/22/2015] [Indexed: 12/11/2022]
Abstract
Glyoxalase I (Glo1) is a cellular defense enzyme involved in the detoxification of methylglyoxal (MG), a cytotoxic by-product of glycolysis, and MG-derived advanced glycation end products (AGEs). Argpyrimidine (AP), one of the major AGEs coming from MG modification of protein arginines, is a proapoptotic agent. Crystalline silica is a well-known occupational health hazard, responsible for a relevant number of pulmonary diseases. Exposure of cells to crystalline silica results in a number of complex biological responses, including apoptosis. The present study was aimed at investigating whether, and through which mechanism, Glo1 was involved in Min-U-Sil 5 crystalline silica-induced apoptosis. Apoptosis, by TdT-mediated dUTP nick-end labeling assay, and transcript and protein levels or enzymatic activity, by quantitative real-time PCR, Western blot, and spectrophotometric methods, respectively, were evaluated in human bronchial BEAS-2B cells exposed or not (control) to crystalline silica and also in experiments with appropriate inhibitors. Reactive oxygen species were evaluated by coumarin-7-boronic acid or Amplex red hydrogen peroxide/peroxidase methods for peroxynitrite (ONOO(-)) or hydrogen peroxide (H2O2) measurements, respectively. Our results showed that Min-U-Sil 5 crystalline silica induced a dramatic ONOO(-)-mediated inhibition of Glo1, leading to AP-modified Hsp70 protein accumulation that, in a mechanism involving JNK and NF-κB, triggered an apoptotic mitochondrial pathway. Inhibition of Glo1 occurred at both functional and transcriptional levels, the latter occurring via ERK1/2 MAPK and miRNA 101 involvement. Taken together, our data demonstrate that Glo1 is involved in the Min-U-Sil 5 crystalline silica-induced BEAS-2B cell mitochondrial apoptotic pathway via a novel mechanism involving Hsp70, JNK, and NF-κB. Because maintenance of an intact respiratory epithelium is a critically important determinant of normal respiratory function, the knowledge of the mechanisms underlying its disruption may provide insight into the genesis, and possibly the prevention, of a number of pathological conditions commonly occurring in silica dust occupational exposure.
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Affiliation(s)
- Cinzia Antognelli
- Department of Experimental Medicine University of Perugia, 06129 Perugia, Italy.
| | - Angela Gambelunghe
- Department of Medicine, School of Medicine, University of Perugia, 06129 Perugia, Italy
| | - Giacomo Muzi
- Department of Medicine, School of Medicine, University of Perugia, 06129 Perugia, Italy
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22
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Wei J, Li F, Yang J, Liu X, Cho WC. MicroRNAs as regulators of airborne pollution-induced lung inflammation and carcinogenesis. Arch Toxicol 2015; 89:677-85. [PMID: 25667014 DOI: 10.1007/s00204-015-1462-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 01/08/2015] [Indexed: 12/14/2022]
Abstract
The increasing incidence of pulmonary inflammation and lung cancer, as well as exacerbation of pre-existing chronic lung diseases by exposure to airborne pollutants, e.g., particulate matter and cigarette smoke, is becoming a major public health concern in the world. However, the exact mechanisms of pulmonary injury from exposure to these airborne insults have not been fully elucidated. Nevertheless, accumulating evidence suggests that microRNAs (miRNAs) may play a unique role in the regulation of airborne agent-induced lung inflammation and carcinogenesis. Since epigenetic modifications are heritable and reversible, this may provide a new insight into the relationship of miRNAs and environmental pollution-related lung disorders. The aim of this review was to update our existing knowledge regarding the mechanisms by which airborne pollutants altering miRNA profiles in the lung, specifically for cigarette smoke and airborne particulate matter, and the potential biological roles of miRNAs in the initiation of pulmonary inflammation and lung cancer, as well as the regulation of underlying genetic susceptibility to these environmental stressors.
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Affiliation(s)
- Jun Wei
- Center of Medical Research, General Hospital, Ningxia Medical University, Yinchuan, Ningxia, 750004, People's Republic of China
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23
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Abstract
Immune-mediated pulmonary diseases are a group of diseases that resulted from immune imbalance initiated by allergens or of unknown causes. Inflammatory responses without restrictions cause tissue damage and remodeling, which leads to airway hyperactivity, destruction of alveolar architecture, and a resultant loss of lung function. Epigenetic mechanisms have been demonstrated to be involved in inflammation, autoimmunity, and cancer. Recent studies have identified that epigenetic changes also regulate molecular pathways in immune-mediated lung diseases. Aberrant DNA methylation status, dysregulation of histone modifications, as well as altered microRNAs expression could change transcription activity of genes involved in the development of immune-mediated pulmonary diseases, which contributes to skewed differentiation of T cells and proliferation and activation of myofibroblasts, leading to overproduction of inflammatory cytokines and excessive accumulation of extracellular matrix, respectively. Aside from this, epigenetics also explains how environmental exposure influence on gene transcription without genetic changes. It acts as a mediator of the interaction between environmental factors and genetic factors. Identification of the abnormal epigenetic marks in diseases provides novel biomarkers for prediction and diagnosis and affords novel therapeutic targets for those difficult clinical problems, such as steroid-resistance and rapidly progressing fibrosis. In this review, we summarized the latest experimental and translational epigenetic studies in immune-mediated pulmonary diseases, including asthma, idiopathic pulmonary fibrosis, tuberculosis, sarcoidosis, and silicosis.
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Izzotti A, Pulliero A. The effects of environmental chemical carcinogens on the microRNA machinery. Int J Hyg Environ Health 2014; 217:601-27. [PMID: 24560354 DOI: 10.1016/j.ijheh.2014.01.001] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/03/2014] [Accepted: 01/06/2014] [Indexed: 12/29/2022]
Abstract
The first evidence that microRNA expression is early altered by exposure to environmental chemical carcinogens in still healthy organisms was obtained for cigarette smoke. To date, the cumulative experimental data indicate that similar effects are caused by a variety of environmental carcinogens, including polycyclic aromatic hydrocarbons, nitropyrenes, endocrine disruptors, airborne mixtures, carcinogens in food and water, and carcinogenic drugs. Accordingly, the alteration of miRNA expression is a general mechanism that plays an important pathogenic role in linking exposure to environmental toxic agents with their pathological consequences, mainly including cancer development. This review summarizes the existing experimental evidence concerning the effects of chemical carcinogens on the microRNA machinery. For each carcinogen, the specific microRNA alteration signature, as detected in experimental studies, is reported. These data are useful for applying microRNA alterations as early biomarkers of biological effects in healthy organisms exposed to environmental carcinogens. However, microRNA alteration results in carcinogenesis only if accompanied by other molecular damages. As an example, microRNAs altered by chemical carcinogens often inhibits the expression of mutated oncogenes. The long-term exposure to chemical carcinogens causes irreversible suppression of microRNA expression thus allowing the transduction into proteins of mutated oncogenes. This review also analyzes the existing knowledge regarding the mechanisms by which environmental carcinogens alter microRNA expression. The underlying molecular mechanism involves p53-microRNA interconnection, microRNA adduct formation, and alterations of Dicer function. On the whole, reported findings provide evidence that microRNA analysis is a molecular toxicology tool that can elucidate the pathogenic mechanisms activated by environmental carcinogens.
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Affiliation(s)
- A Izzotti
- Department of Health Sciences, University of Genoa, Italy; Mutagenesis Unit, IRCCS University Hospital San Martino - IST National Research Cancer Institute, Genoa, Italy.
| | - A Pulliero
- Department of Health Sciences, University of Genoa, Italy
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25
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Clearance of free silica in rat lungs by spraying with chinese herbal kombucha. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:790792. [PMID: 24023583 PMCID: PMC3760100 DOI: 10.1155/2013/790792] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 06/04/2013] [Indexed: 11/17/2022]
Abstract
The effects of spraying with kombucha and Chinese herbal kombucha were compared with treatments with tetrandrine in a rat silicosis model. Silica dust (50 mg) was injected into the lungs of rats, which were then treated with one of the experimental treatments for a month. The rats were then killed and the effects of the treatments were evaluated by examining the extent and severity of the histopathological lesions in the animals' lungs, measuring their organ coefficients and lung collagen contents, determining the dry and wet weights of their lungs, and measuring the free silica content of the dried lungs. In addition, lavage was performed on whole lungs taken from selected rats, and the numbers and types of cells in the lavage fluid were counted. The most effective treatment in terms of the ability to reduce lung collagen content and minimize the formation of pulmonary histopathological lesions was tetrandrine treatment, followed by Chinese herbal kombucha and non-Chinese herbal kombucha. However, the lavage fluid cell counts indicated that tetrandrine treatment had severe adverse effects on macrophage viability. This effect was much less pronounced for the kombucha and Chinese herbal kombucha treatments. Moreover, the free silica levels in the lungs of animals treated with Chinese herbal kombucha were significantly lower than those for any other silica-exposed group. These preliminary results indicate that spraying with Chinese herbal kombucha preparations can effectively promote the discharge of silica dust from lung tissues. Chinese herbal kombucha inhalation may thus be a useful new treatment for silicosis and other pneumoconiosis diseases.
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