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Li H, Zhang Z, Xu Q, Fu E, Lyu P, Pan X, Zheng Z, Qin H. Integrated transcriptomic and proteomic analyses reveal the effects of chronic benzene exposure on the central nervous system in mice. Toxicol Mech Methods 2024:1-12. [PMID: 39099385 DOI: 10.1080/15376516.2024.2387740] [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: 06/26/2024] [Revised: 07/29/2024] [Accepted: 07/29/2024] [Indexed: 08/06/2024]
Abstract
Benzene exposure is known to cause serious damage to the human hematopoietic system. However, recent studies have found that chronic benzene exposure may also cause neurological damage, but there were few studies in this issue. The aim of this study was to investigate the mechanism of damage to the central nervous system (CNS) by chronic benzene exposure with a multi-omics analysis. We established a chronic benzene exposure model in C57BL/6J mice by gavage of benzene-corn oil suspension, identified the differentially expressed proteins (DEPs) and differentially expressed genes (DEGs) in mice brain using 4D Label-free proteomic and RNA-seq transcriptomic. We observed that the benzene exposure mice had a significant loss of body weight, reduction in complete blood counts, abnormally high MRI signals in brain white matter, as well as extensive brain edema and neural demyelination. 162 DEPs were identified by the proteome, including 98 up-regulated and 64 down-regulated proteins. KEGG pathway analysis of DEPs showed that they were mainly involved in the neuro-related signaling pathways such as metabolic pathways, pathways of neurodegeneration, chemical carcinogenesis, Alzheimer disease, and autophagy. EPHX1, GSTM1, and LIMK1 were identified as important candidate DEGs/DEPs by integrated proteomic and transcriptomic analyses. We further performed multiple validation of the above DEGs/DEPs using fluorescence quantitative PCR (qPCR), parallel reaction monitoring (PRM), immunohistochemistry, and immunoblotting to confirm the reliability of the multi-omics study. The functions of these DEGs/DEPs were further explored and analyzed, providing a theoretical basis for the mechanism of nerve damage caused by benzene exposure.
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Affiliation(s)
- Hongwei Li
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Institute of Special Environmental Medicine, Henan University of Science and Technology, Luoyang, Henan, China
| | - Zhenqian Zhang
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Institute of Special Environmental Medicine, Henan University of Science and Technology, Luoyang, Henan, China
| | - Qiannan Xu
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Institute of Special Environmental Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Department of Forensic Pathology and Toxicology, Judicial Appraisal Center of Henan University of Science and Technology, Luoyang, Henan, China
| | - Enhao Fu
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Institute of Special Environmental Medicine, Henan University of Science and Technology, Luoyang, Henan, China
| | - Ping Lyu
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Institute of Special Environmental Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Department of Forensic Pathology and Toxicology, Judicial Appraisal Center of Henan University of Science and Technology, Luoyang, Henan, China
| | - Xinmin Pan
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Institute of Special Environmental Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Department of Forensic Pathology and Toxicology, Judicial Appraisal Center of Henan University of Science and Technology, Luoyang, Henan, China
| | - Zhe Zheng
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Institute of Special Environmental Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Department of Forensic Pathology and Toxicology, Judicial Appraisal Center of Henan University of Science and Technology, Luoyang, Henan, China
| | - Haojie Qin
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Institute of Special Environmental Medicine, Henan University of Science and Technology, Luoyang, Henan, China
- Department of Forensic Pathology and Toxicology, Judicial Appraisal Center of Henan University of Science and Technology, Luoyang, Henan, China
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Wang F, Ye L, Jiang X, Zhang R, Chen S, Chen L, Yu H, Zeng X, Li D, Xing X, Xiao Y, Chen W. Specific CpG sites methylation is associated with hematotoxicity in low-dose benzene-exposed workers. ENVIRONMENT INTERNATIONAL 2024; 186:108645. [PMID: 38615541 DOI: 10.1016/j.envint.2024.108645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 03/10/2024] [Accepted: 04/08/2024] [Indexed: 04/16/2024]
Abstract
Benzene is a broadly used industrial chemicals which causes various hematologic abnormalities in human. Altered DNA methylation has been proposed as epigenetic biomarkers in health risk evaluation of benzene exposure, yet the role of methylation at specific CpG sites in predicting hematological effects remains unclear. In this study, we recruited 120 low-level benzene-exposed and 101 control male workers from a petrochemical factory in Maoming City, Guangdong Province, China. Urinary S-phenylmercapturic acid (SPMA) in benzene-exposed workers was 3.40-fold higher than that in control workers (P < 0.001). Benzene-induced hematotoxicity was characterized by reduced white blood cells counts and nuclear division index (NDI), along with an increased DNA damage and urinary 8-hydroxy-2'-deoxyguanosine (all P < 0.05). Methylation levels of TRIM36, MGMT and RASSF1a genes in peripheral blood lymphocytes (PBLCs) were quantified by pyrosequencing. CpG site 6 of TRIM36, CpG site 2, 4, 6 of RASSF1a and CpG site 1, 3 of MGMT methylation were recognized as hot CpG sites due to a strong correlation with both internal exposure and hematological effects. Notably, integrating hot CpG sites methylation of multiple genes reveal a higher efficiency in prediction of integrative damage compared to individual genes at hot CpG sites. The negative dose-response relationship between the combined methylation of hot CpG sites in three genes and integrative damage enabled the classification of benzene-exposed individuals into high-risk or low-risk groups using the median cut-off value of the integrative index. Subsequently, a prediction model for integrative damage in benzene-exposed populations was built based on the methylation status of the identified hot CpG sites in the three genes. Taken together, these findings provide a novel insight into application prospect of specific CpG site methylation as epi-biomarkers for health risk assessment of environmental pollutants.
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Affiliation(s)
- Feier Wang
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Lizhu Ye
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China; Boji Drug Evaluation Center, Boji Medical Technology Co., Ltd, Guangzhou, China
| | - Xinhang Jiang
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Rui Zhang
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Shen Chen
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Liping Chen
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Hongyao Yu
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Xiaowen Zeng
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Daochuan Li
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Xiumei Xing
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Yongmei Xiao
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China.
| | - Wen Chen
- Department of Toxicology, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-sen University, Guangzhou, China.
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Liu A, Li X, Zhou L, Yan X, Xia N, Song Z, Cao J, Hao Z, Zhang Z, Liang R, Zhang H. BPDE-DNA adduct formation and alterations of mRNA, protein, and DNA methylation of CYP1A1, GSTP1, and GSTM1 induced by benzo[a]pyrene and the intervention of aspirin in mice. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:106549-106561. [PMID: 37730975 DOI: 10.1007/s11356-023-29878-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 09/10/2023] [Indexed: 09/22/2023]
Abstract
Benzo[a]pyrene (B[a]P), one typical environmental pollutant, the toxicity mechanisms, and potential prevention remain perplexing. Available evidence suggests cytochrome P450 1A1 (CYP1A1) and glutathione S-transferases (GSTs) metabolize B[a]P, resulting in metabolic activation and detoxification of B[a]P. This study aimed to reveal the impact of B[a]P exposure on trans-7,8-diol-anti-9,10-epoxide DNA (BPDE-DNA) adduct formation, level of CYP1A1, glutathione S-transferase pi (GSTP1) and glutathione S-transferase mu1 (GSTM1) mRNA, protein and DNA methylation in mice, and the potential prevention of aspirin (ASP). This study firstly determined the BPDE-DNA adduct formation in an acute toxicity test of a large dose in mice induced by B[a]P, which subsequently detected CYP1A1, GSTP1, and GSTM1 at levels of mRNA, protein, and DNA methylation in the organs of mice in a subacute toxicity test at appropriate doses and the potential prevention of ASP, using the methods of real-time quantitative PCR (QPCR), western blotting, and real-time methylation-specific PCR (MSP), respectively. The results verified that B[a]P induced the formation of BPDE-DNA adduct in all the organs of mice in an acute toxicity test, and the order of concentration of which was lung > kidney > liver > brain. In a subacute toxicity test, following B[a]P treatment, mice showed a dose-dependent slowdown in body weight gain and abnormalities in behavioral and cognitive function and which were alleviated by ASP co-treatment. Compared to the controls, following B[a]P treatment, CYP1A1 was significantly induced in all organs in mice at mRNA level (P < 0.05), was suppressed in the lung and cerebrum of mice at protein level, and inhibited at DNA methylation level in the liver, lung, and cerebrum, whereas GSTP1 and GSTM1 at mRNA, protein, and DNA methylation levels showed organ-specific changes in mice following B[a]P treatment, which was generally alleviated by ASP intervention. In conclusion, B[a]P induced BPDE-DNA adduct formation in all organs in mice and altered the mRNA, protein, and DNA methylation levels in CYP1A1, GSTP1, and GSTM1 in an organ-dependent pattern, which could be related to the organ toxicity and mechanism of B[a]P. ASP intervention may be an effective measure to prevent B[a]P toxicity. The findings provide scientific evidence for further study on the organ toxicity and mechanisms of B[a]P.
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Affiliation(s)
- Aixiang Liu
- Department of Environmental Health, School of Public Health, Shanxi Medical University, 56 Xinjian South Road, Taiyuan, 030001, Shanxi, China
- Department of Health Information Management, Shanxi Medical University Fenyang College, Fenyang, 032200, Shanxi, China
| | - Xin Li
- Center of Disease Control and Prevention, Taiyuan Iron and Steel Co Ltd, Taiyuan, 030003, Shanxi, China
| | - Lisha Zhou
- Department of Environmental Health, School of Public Health, Shanxi Medical University, 56 Xinjian South Road, Taiyuan, 030001, Shanxi, China
| | - Xiaoqing Yan
- Department of Environmental Health, School of Public Health, Shanxi Medical University, 56 Xinjian South Road, Taiyuan, 030001, Shanxi, China
| | - Na Xia
- Department of Environmental Health, School of Public Health, Shanxi Medical University, 56 Xinjian South Road, Taiyuan, 030001, Shanxi, China
- Key Laboratory of Coal Environmental Pathogenicity and Prevention, Ministry of Education, Taiyuan, 030001, Shanxi, China
| | - Zhanfei Song
- Department of Environmental Health, School of Public Health, Shanxi Medical University, 56 Xinjian South Road, Taiyuan, 030001, Shanxi, China
| | - Jingjing Cao
- Department of Environmental Health, School of Public Health, Shanxi Medical University, 56 Xinjian South Road, Taiyuan, 030001, Shanxi, China
| | - Zhongsuo Hao
- Department of Environmental Health, School of Public Health, Shanxi Medical University, 56 Xinjian South Road, Taiyuan, 030001, Shanxi, China
| | - Zhihong Zhang
- Department of Environmental Health, School of Public Health, Shanxi Medical University, 56 Xinjian South Road, Taiyuan, 030001, Shanxi, China
| | - Ruifeng Liang
- Department of Environmental Health, School of Public Health, Shanxi Medical University, 56 Xinjian South Road, Taiyuan, 030001, Shanxi, China
| | - Hongmei Zhang
- Department of Environmental Health, School of Public Health, Shanxi Medical University, 56 Xinjian South Road, Taiyuan, 030001, Shanxi, China.
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Jiménez-Garza O, Ghosh M, Barrow TM, Godderis L. Toxicomethylomics revisited: A state-of-the-science review about DNA methylation modifications in blood cells from workers exposed to toxic agents. Front Public Health 2023; 11:1073658. [PMID: 36891347 PMCID: PMC9986591 DOI: 10.3389/fpubh.2023.1073658] [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: 10/18/2022] [Accepted: 01/25/2023] [Indexed: 02/22/2023] Open
Abstract
Introduction Epigenetic marks have been proposed as early changes, at the subcellular level, in disease development. To find more specific biomarkers of effect in occupational exposures to toxicants, DNA methylation studies in peripheral blood cells have been performed. The goal of this review is to summarize and contrast findings about DNA methylation in blood cells from workers exposed to toxicants. Methods A literature search was performed using PubMed and Web of Science. After first screening, we discarded all studies performed in vitro and in experimental animals, as well as those performed in other cell types other than peripheral blood cells. Results: 116 original research papers met the established criteria, published from 2007 to 2022. The most frequent investigated exposures/labor group were for benzene (18.9%) polycyclic aromatic hydrocarbons (15.5%), particulate matter (10.3%), lead (8.6%), pesticides (7.7%), radiation (4.3%), volatile organic compound mixtures (4.3%), welding fumes (3.4%) chromium (2.5%), toluene (2.5%), firefighters (2.5%), coal (1.7%), hairdressers (1.7%), nanoparticles (1.7%), vinyl chloride (1.7%), and others. Few longitudinal studies have been performed, as well as few of them have explored mitochondrial DNA methylation. Methylation platforms have evolved from analysis in repetitive elements (global methylation), gene-specific promoter methylation, to epigenome-wide studies. The most reported observations were global hypomethylation as well as promoter hypermethylation in exposed groups compared to controls, while methylation at DNA repair/oncogenes genes were the most studied; studies from genome-wide studies detect differentially methylated regions, which could be either hypo or hypermethylated. Discussion Some evidence from longitudinal studies suggest that modifications observed in cross-sectional designs may be transitory; then, we cannot say that DNA methylation changes are predictive of disease development due to those exposures. Conclusion Due to the heterogeneity in the genes studied, and scarcity of longitudinal studies, we are far away from considering DNA methylation changes as biomarkers of effect in occupational exposures, and nor can we establish a clear functional or pathological correlate for those epigenetic modifications associated with the studied exposures.
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Affiliation(s)
- Octavio Jiménez-Garza
- Health Sciences Institute, Autonomous University of Hidalgo State, Pachuca Hidalgo, Mexico
| | - Manosij Ghosh
- Environment and Health Department, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Timothy M Barrow
- Faculty of Health Sciences and Wellbeing, University of Sunderland, Sunderland, United Kingdom
| | - Lode Godderis
- Environment and Health Department, Katholieke Universiteit Leuven, Leuven, Belgium
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Verma N, Pandit S, Gupta PK, Kumar S, Kumar A, Giri SK, Yadav G, Priya K. Occupational health hazards and wide spectrum of genetic damage by the organic solvent fumes at the workplace: A critical appraisal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:30954-30966. [PMID: 35102507 DOI: 10.1007/s11356-022-18889-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 01/22/2022] [Indexed: 06/14/2023]
Abstract
Long-term exposure to organic solvents is known to affect human health posing serious occupational hazards. Organic solvents are genotoxic, and they can cause genetic changes in the exposed employees' somatic or germ cells. Chemicals such as benzene, toluene, and gasoline induce an excessive amount of genotoxicity results either in genetic polymorphism or culminates in deleterious mutations when concentration crosses the threshold limits. The impact of genotoxicity is directly related to the time of exposure, types, and quantum of solvent. Genotoxicity affects almost all the physiological systems, but the most vulnerable ones are the nervous system, reproductive system, and blood circulatory system. Based on the available literature report, we propose to evaluate the outcomes of such chemicals on the exposed humans at the workplace. Attempts would be made to ascertain if the long-term exposure makes a person resistant to such chemicals. This may seem to be a far-fetched idea but has not been studied. The health prospect of this study is envisaged to complement the already existing data facilitating a deeper understanding of the genotoxicity across the population. This would also demonstrate if it correlates with the demographic profile of the population and contributes to comorbidity and epidemiology.
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Affiliation(s)
- Neha Verma
- Deptt. of Life Sciences, SBSR, Sharda University, Greater Noida, UP, 201310, India
| | - Soumya Pandit
- Deptt. of Life Sciences, SBSR, Sharda University, Greater Noida, UP, 201310, India
| | - Piyush Kumar Gupta
- Deptt. of Life Sciences, SBSR, Sharda University, Greater Noida, UP, 201310, India
| | - Sanjay Kumar
- Deptt. of Life Sciences, SBSR, Sharda University, Greater Noida, UP, 201310, India
| | - Anil Kumar
- Center of Medical Biotechnology, Maharishi Dayanand University, Rohtak Haryana, HR, 124001, India
| | - Shiv Kumar Giri
- Department of Biotechnology, Maharaja Agrasen University, Baddi, HP, India
| | - Gulab Yadav
- Department of Biotechnology, Maharaja Agrasen University, Baddi, HP, India
| | - Kanu Priya
- Deptt. of Life Sciences, SBSR, Sharda University, Greater Noida, UP, 201310, India.
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Ramírez‐Lopera V, Uribe‐Castro D, Bautista‐Amorocho H, Silva‐Sayago JA, Mateus‐Sánchez E, Ardila‐Barbosa WY, Pérez‐Cala TL. The effects of genetic polymorphisms on benzene-exposed workers: A systematic review. Health Sci Rep 2021; 4:e327. [PMID: 34295994 PMCID: PMC8284097 DOI: 10.1002/hsr2.327] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 05/04/2021] [Accepted: 05/20/2021] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND AND AIMS Benzene is a group I carcinogen, which has been associated with leukemia and myelodysplastic syndrome. Moreover, it has been proposed that polymorphisms in benzene metabolizing genes influence the outcomes of benzene exposure in the human body. This systematic review aims to elucidate the existent relationship between genetic polymorphisms and the risk of developing adverse health effects in benzene-exposed workers. METHODS Three databases were systematically searched until April 2020. The preferred reporting items for systematic reviews and meta-analyses method was used to select articles published between 2005 and 2020. Quality assessment and risk of bias were evaluated by the Newcastle-Ottawa scale. RESULTS After full-text evaluation, 36 articles remained out of 645 initially screened. The most studied health effects within the reviewed papers were chronic benzene poisoning, hematotoxicity, altered urinary biomarkers of exposure, micronucleus/chromosomal aberrations, and gene methylation. Furthermore, some polymorphisms on NQO1, GSTT1, GSTM1, MPO, and CYP2E1, among other genes, showed a statistically significant relationship with an increased risk of developing at least one of these effects on benzene-exposed workers. However, there was no consensus among the reviewed papers on which specific polymorphisms were the ones associated with the adverse health-related outcomes, except for the NQO1 rs1800566 and the GSTT1 null genotypes. Additionally, the smoking habit was identified as a confounder, demonstrating worse health outcomes in exposed workers that smoked. CONCLUSION Though there is a positive relationship between genetic polymorphisms and detrimental health outcomes for benzene-exposed workers, broader benzene-exposed cohorts that take into account the genetic diversity of the population are needed in order to determine which specific polymorphisms incur in health risks.
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Affiliation(s)
- Verónica Ramírez‐Lopera
- Bacterias & Cáncer Group, Microbiology and Parasitology, Faculty of MedicineUniversidad de AntioquiaMedellínColombia
| | - Daniel Uribe‐Castro
- Bacterias & Cáncer Group, Microbiology and Parasitology, Faculty of MedicineUniversidad de AntioquiaMedellínColombia
| | - Henry Bautista‐Amorocho
- Bacterias & Cáncer Group, Microbiology and Parasitology, Faculty of MedicineUniversidad de AntioquiaMedellínColombia
- Grupo de Investigación en Desarrollo Humano, Tejido Social e Innovaciones Tecnológicas—GIDTI, Programa Administración en Salud OcupacionalCentro Regional Bucaramanga, Corporación Universitaria Minuto de DiosBucaramangaColombia
| | - Jorge Alexander Silva‐Sayago
- Grupo de Investigación en Desarrollo Humano, Tejido Social e Innovaciones Tecnológicas—GIDTI, Programa Administración en Salud OcupacionalCentro Regional Bucaramanga, Corporación Universitaria Minuto de DiosBucaramangaColombia
| | - Enrique Mateus‐Sánchez
- Grupo de Investigación en Desarrollo Humano, Tejido Social e Innovaciones Tecnológicas—GIDTI, Programa de PsicologíaCentro Regional Bucaramanga, Corporación Universitaria Minuto de DiosBucaramangaColombia
| | - Wilman Yesid Ardila‐Barbosa
- Grupo de Investigación en Desarrollo Humano, Tejido Social e Innovaciones Tecnológicas—GIDTI, Programa Administración en Salud OcupacionalCentro Regional Bucaramanga, Corporación Universitaria Minuto de DiosBucaramangaColombia
| | - Tania Liseth Pérez‐Cala
- Bacterias & Cáncer Group, Microbiology and Parasitology, Faculty of MedicineUniversidad de AntioquiaMedellínColombia
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Wu Y, Qie R, Cheng M, Zeng Y, Huang S, Guo C, Zhou Q, Li Q, Tian G, Han M, Zhang Y, Wu X, Li Y, Zhao Y, Yang X, Feng Y, Liu D, Qin P, Hu D, Hu F, Xu L, Zhang M. Air pollution and DNA methylation in adults: A systematic review and meta-analysis of observational studies. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 284:117152. [PMID: 33895575 DOI: 10.1016/j.envpol.2021.117152] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 04/04/2021] [Accepted: 04/05/2021] [Indexed: 05/24/2023]
Abstract
This systematic review and meta-analysis aimed to investigate the association between air pollution and DNA methylation in adults from published observational studies. PubMed, Web of Science and Embase databases were systematically searched for available studies on the association between air pollution and DNA methylation published up to March 9, 2021. Three DNA methylation approaches were considered: global methylation, candidate-gene, and epigenome-wide association studies (EWAS). Meta-analysis was used to summarize the combined estimates for the association between air pollutants and global DNA methylation levels. Heterogeneity was assessed with the Cochran Q test and quantified with the I2 statistic. In total, 38 articles were included in this study: 16 using global methylation, 18 using candidate genes, and 11 using EWAS, with 7 studies using more than one approach. Meta-analysis revealed an imprecise but inverse association between exposure to PM2.5 and global DNA methylation (for each 10-μg/m3 PM2.5, combined estimate: 0.39; 95% confidence interval: 0.97 - 0.19). The candidate-gene results were consistent for the ERCC3 and SOX2 genes, suggesting hypermethylation in ERCC3 associated with benzene and that in SOX2 associated with PM2.5 exposure. EWAS identified 201 CpG sites and 148 differentially methylated regions that showed differential methylation associated with air pollution. Among the 307 genes investigated in 11 EWAS, a locus in nucleoredoxin gene was found to be positively associated with PM2.5 in two studies. Current meta-analysis indicates that PM2.5 is imprecisely and inversely associated with DNA methylation. The candidate-gene results consistently suggest hypermethylation in ERCC3 associated with benzene exposure and that in SOX2 associated with PM2.5 exposure. The Kyoto Encyclopedia of Genes and Genomes (KEGG) network analyses revealed that these genes were associated with African trypanosomiasis, Malaria, Antifolate resistance, Graft-versus-host disease, and so on. More evidence is needed to clarify the association between air pollution and DNA methylation.
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Affiliation(s)
- Yuying Wu
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China
| | - Ranran Qie
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Min Cheng
- Department of Cardiology, Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China
| | - Yunhong Zeng
- Center for Health Management, The Affiliated Shenzhen Hospital of University of Chinese Academy of Sciences, Shenzhen, Guangdong, People's Republic of China
| | - Shengbing Huang
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Chunmei Guo
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Qionggui Zhou
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China
| | - Quanman Li
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Gang Tian
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Minghui Han
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Yanyan Zhang
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China
| | - Xiaoyan Wu
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China
| | - Yang Li
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China
| | - Yang Zhao
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Xingjin Yang
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Yifei Feng
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Dechen Liu
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Pei Qin
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China
| | - Dongsheng Hu
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China; Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Fulan Hu
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China
| | - Lidan Xu
- Department of Nutrition, The Second Affiliated Hospital, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China
| | - Ming Zhang
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen University Health Science Center, Shenzhen, Guangdong, People's Republic of China.
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8
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Jiménez-Garza O, Linares-Segovia B, Ruiz-García L, Monroy-Torres R, Hernández-Luna MA. 5'UTR methylation in different genes from workers exposed to volatile organic compounds: A new insight for considering an epigenetic mark as a functional correlate. Toxicol Lett 2020; 330:59-64. [PMID: 32437847 DOI: 10.1016/j.toxlet.2020.05.001] [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: 11/01/2019] [Revised: 04/28/2020] [Accepted: 05/03/2020] [Indexed: 11/17/2022]
Abstract
Gene-specific methylation has been related with transcriptional/translational consequences in different cells; also, this epigenetic modification is affected by environmental exposures. In previous studies, CYP2E1 activity in toluene-exposed workers was decreased compared to controls, however, CYP2E1 promoter methylation levels did not show significant differences. Here, we compared gene-specific methylation levels at the 5'UTR region, in a subset of workers whom already participated in two former studies, compared to controls. METHODS DNA was obtained from whole blood in five different groups: occupationally exposed to a mixture of volatile organic compounds (VOC): high levels (n = 19); low levels (n = 19) and very low levels (n = 17), toluene-exposed workers (n = 19) and control group (n = 19). We performed PCR-pyrosequencing at the 5'UTR region from four genes: CYP2E1, IL-6, SOD1 and TNF-α. RESULTS In participants exposed to high levels of a VOC mixture, we found significant differences: lower methylation levels for IL-6, and higher methylation levels for TNF-α compared to controls. In toluene-exposed workers, we found significant, lower methylation levels for CYP2E1 compared to controls. CONCLUSION Lower methylation levels at the 5'UTR region from CYP2E1 in toluene exposed-workers, suggests that this epigenetic modification could represent a functional correlate regarding enzymatic activity, as a response to toluene biotransformation.
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Affiliation(s)
- Octavio Jiménez-Garza
- Health Sciences Division, University of Guanajuato, León Campus. Blvd. Puente del Milenio, 1001 Fracc. Del Predio San Carlos, CP 37670, León, Guanajuato, Mexico.
| | - Benigno Linares-Segovia
- Health Sciences Division, University of Guanajuato, León Campus. Blvd. Puente del Milenio, 1001 Fracc. Del Predio San Carlos, CP 37670, León, Guanajuato, Mexico
| | - Liliana Ruiz-García
- Health Sciences Division, University of Guanajuato, León Campus. Blvd. Puente del Milenio, 1001 Fracc. Del Predio San Carlos, CP 37670, León, Guanajuato, Mexico
| | - Rebeca Monroy-Torres
- Health Sciences Division, University of Guanajuato, León Campus. Blvd. Puente del Milenio, 1001 Fracc. Del Predio San Carlos, CP 37670, León, Guanajuato, Mexico
| | - Marco Antonio Hernández-Luna
- Health Sciences Division, University of Guanajuato, León Campus. Blvd. Puente del Milenio, 1001 Fracc. Del Predio San Carlos, CP 37670, León, Guanajuato, Mexico
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9
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Zhou Y, Sun M, Tang Y, Chen Y, Zhu C, Yang Y, Wang C, Yu G, Tang Z. Responses of the proteome in testis of mice exposed chronically to environmentally relevant concentrations of Microcystin-LR. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 187:109824. [PMID: 31654863 DOI: 10.1016/j.ecoenv.2019.109824] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 10/13/2019] [Accepted: 10/15/2019] [Indexed: 06/10/2023]
Abstract
Microcystin-LR (MC-LR), a widespread environmental contaminant, has been shown to have potent acute testicular toxicity. However, magnitudes of toxic effects, induced by MCs, depend on route and magnitude of exposure to the toxin. In the present study, male mice were orally exposed 1, 10 or 100 μg/L MC-LR for 90 or 180 days, and pathological approach and the isobaric tags for relative and absolute quantitation (iTRAQ)-based proteomics were employed with testes. Proteomics revealed that a number of differentially altered proteins may be involved in MC-LR-induced chronic testicular toxicity. The biological process analysis indicated the altered proteins played an important role in biological adhesion, cellular process, response to stimulus or rhythmic process. The cellular component analysis revealed that most of the proteins with altered expression associated with cell part, extracellular region, extracellular region part, membrane, membrane part, organelle or organelle part. The molecular function showed that these proteins were critical in molecular transducer activity. Integrity analyses provide first compelling evidence that MC-LR significantly cause dysfunction of blood-testis barrier (BTB) through affecting tight junctions and gap junctions. Moreover, phosphatidylinositol 3-kinase (PI3K)/AKT eventually contributed to injury result from chronic low-level MC-LR treatment. Identification of proteins in testis responsive to MC-LR provides insights into molecular mechanisms of chronic toxicity of MCs.
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Affiliation(s)
- Yuan Zhou
- Department of Biochemistry and Molecular Biology, Nanjing University of Chinese Medicine, Nanjing, 210023, Jiangsu, China
| | - Menghan Sun
- Department of Physiology, Nanjing University of Chinese Medicine, Nanjing, 210023, Jiangsu, China
| | - Ye Tang
- Department of Physiology, Nanjing University of Chinese Medicine, Nanjing, 210023, Jiangsu, China
| | - Yu Chen
- Research Center of Endocrine and Metabolic Diseases, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Jiangsu Province Academy of Traditonal Chinese Medicine, Nanjing, 210023, Jiangsu, China
| | - Chan Zhu
- Department of Physiology, Nanjing University of Chinese Medicine, Nanjing, 210023, Jiangsu, China
| | - Yan Yang
- Department of Physiology, Nanjing University of Chinese Medicine, Nanjing, 210023, Jiangsu, China
| | - Changming Wang
- Department of Physiology, Nanjing University of Chinese Medicine, Nanjing, 210023, Jiangsu, China
| | - Guang Yu
- Department of Biochemistry and Molecular Biology, Nanjing University of Chinese Medicine, Nanjing, 210023, Jiangsu, China.
| | - Zongxiang Tang
- Department of Physiology, Nanjing University of Chinese Medicine, Nanjing, 210023, Jiangsu, 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: 23] [Impact Index Per Article: 4.6] [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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Huai C, Wei Y, Li M, Zhang X, Wu H, Qiu X, Shen L, Chen L, Zhou W, Zhang N, Zhu G, Zhang Y, Zhang Z, He L, Qin S. Genome-Wide Analysis of DNA Methylation and Antituberculosis Drug-Induced Liver Injury in the Han Chinese Population. Clin Pharmacol Ther 2019; 106:1389-1397. [PMID: 31247120 DOI: 10.1002/cpt.1563] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 06/11/2019] [Indexed: 12/14/2022]
Abstract
Tuberculosis (TB) is one of the most prevalent infections. However, anti-TB drugs induce adverse liver injury in up to 40% of patients. Studies on candidate genes have suggested that single-nucleotide polymorphisms account for only a small contribution to the occurrence of anti-TB drug-induced liver injury (ATLI). In this study, whole-genome DNA methylation analysis was performed to systematically screen the ATLI-associated factors in a 49 vs. 51 case-control population. Next, 34 identified candidate probes were validated using MassARRAY in 296 cases and 288 controls. Our results indicated that 12 CpG sites on seven probes were positively associated with ATLI risk. Furthermore, we applied a CRISPR/Cas9-mediated methylation modifiable cell model and demonstrated that four CpGs in or near the gene region of AK2, SLC8A2, and PSTPIP2 affected the cellular response to rifampicin treatment. This study provides new biomarkers associated with ATLI occurrence.
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Affiliation(s)
- Cong Huai
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Yuqi Wei
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Mo Li
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoqing Zhang
- Department of Pharmacy, The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Hao Wu
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoyan Qiu
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai, China
| | - Lu Shen
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Luan Chen
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Wei Zhou
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Na Zhang
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Guanghui Zhu
- Department of Pharmacy, The Second Affiliated Hospital, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Ying Zhang
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Zhiruo Zhang
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Lin He
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Shengying Qin
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
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12
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Cheng H, Huang C, Tang G, Qiu H, Gao L, Zhang W, Wang J, Yang J, Chen L. Emerging role of EPHX1 in chemoresistance of acute myeloid leukemia by regurlating drug‐metabolizing enzymes and apoptotic signaling. Mol Carcinog 2019; 58:808-819. [DOI: 10.1002/mc.22973] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/27/2018] [Accepted: 01/07/2019] [Indexed: 01/31/2023]
Affiliation(s)
- Hui Cheng
- Institute of HematologyChanghai HospitalNaval Medical UniversityShanghaiChina
| | - Chongmei Huang
- Institute of HematologyChanghai HospitalNaval Medical UniversityShanghaiChina
| | - Gusheng Tang
- Institute of HematologyChanghai HospitalNaval Medical UniversityShanghaiChina
| | - Huiying Qiu
- Institute of HematologyChanghai HospitalNaval Medical UniversityShanghaiChina
| | - Lei Gao
- Institute of HematologyChanghai HospitalNaval Medical UniversityShanghaiChina
| | - Weiping Zhang
- Institute of HematologyChanghai HospitalNaval Medical UniversityShanghaiChina
| | - Jianmin Wang
- Institute of HematologyChanghai HospitalNaval Medical UniversityShanghaiChina
| | - Jianmin Yang
- Institute of HematologyChanghai HospitalNaval Medical UniversityShanghaiChina
| | - Li Chen
- Institute of HematologyChanghai HospitalNaval Medical UniversityShanghaiChina
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13
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Rota F, Conti A, Campo L, Favero C, Cantone L, Motta V, Polledri E, Mercadante R, Dieci G, Bollati V, Fustinoni S. Epigenetic and Transcriptional Modifications in Repetitive Elements in Petrol Station Workers Exposed to Benzene and MTBE. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:E735. [PMID: 29649143 PMCID: PMC5923777 DOI: 10.3390/ijerph15040735] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/30/2018] [Accepted: 04/08/2018] [Indexed: 12/19/2022]
Abstract
Benzene, a known human carcinogen, and methyl tert-butyl ether (MTBE), not classifiable as to its carcinogenicity, are fuel-related pollutants. This study investigated the effect of these chemicals on epigenetic and transcriptional alterations in DNA repetitive elements. In 89 petrol station workers and 90 non-occupationally exposed subjects the transcriptional activity of retrotransposons (LINE-1, Alu), the methylation on repeated-element DNA, and of H3K9 histone, were investigated in peripheral blood lymphocytes. Median work shift exposure to benzene and MTBE was 59 and 408 µg/m³ in petrol station workers, and 4 and 3.5 µg/m³, in controls. Urinary benzene (BEN-U), S-phenylmercapturic acid, and MTBE were significantly higher in workers than in controls, while trans,trans-muconic acid (tt-MA) was comparable between the two groups. Increased BEN-U was associated with increased Alu-Y and Alu-J expression; moreover, increased tt-MA was associated with increased Alu-Y and Alu-J and LINE-1 (L1)-5'UTR expression. Among repetitive element methylation, only L1-Pa5 was hypomethylated in petrol station workers compared to controls. While L1-Ta and Alu-YD6 methylation was not associated with benzene exposure, a negative association with urinary MTBE was observed. The methylation status of histone H3K9 was not associated with either benzene or MTBE exposure. Overall, these findings only partially support previous observations linking benzene exposure with global DNA hypomethylation.
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Affiliation(s)
- Federica Rota
- EPIGET, Epidemiology, Epigenetics and Toxicology Lab, Department of Clinical Sciences and Community Health, Università Degli Studi di Milano, via San Barnaba 8, 20122 Milan, Italy.
| | - Anastasia Conti
- Department of Life Sciences, University of Parma, 43124 Parma, Italy.
- Present address: San Raffaele Telethon Institute for Gene Therapy (SR-TIGET), 20132 Milan, Italy.
| | - Laura Campo
- Occupational Medicine Unit, Fondazione Cà Granda, IRCCS Ospedale Maggiore Policlinico, 20122 Milan, Italy.
| | - Chiara Favero
- EPIGET, Epidemiology, Epigenetics and Toxicology Lab, Department of Clinical Sciences and Community Health, Università Degli Studi di Milano, via San Barnaba 8, 20122 Milan, Italy.
| | - Laura Cantone
- EPIGET, Epidemiology, Epigenetics and Toxicology Lab, Department of Clinical Sciences and Community Health, Università Degli Studi di Milano, via San Barnaba 8, 20122 Milan, Italy.
| | - Valeria Motta
- EPIGET, Epidemiology, Epigenetics and Toxicology Lab, Department of Clinical Sciences and Community Health, Università Degli Studi di Milano, via San Barnaba 8, 20122 Milan, Italy.
| | - Elisa Polledri
- Occupational Medicine Unit, Fondazione Cà Granda, IRCCS Ospedale Maggiore Policlinico, 20122 Milan, Italy.
| | - Rosa Mercadante
- EPIGET, Epidemiology, Epigenetics and Toxicology Lab, Department of Clinical Sciences and Community Health, Università Degli Studi di Milano, via San Barnaba 8, 20122 Milan, Italy.
| | - Giorgio Dieci
- Department of Life Sciences, University of Parma, 43124 Parma, Italy.
| | - Valentina Bollati
- EPIGET, Epidemiology, Epigenetics and Toxicology Lab, Department of Clinical Sciences and Community Health, Università Degli Studi di Milano, via San Barnaba 8, 20122 Milan, Italy.
- Occupational Medicine Unit, Fondazione Cà Granda, IRCCS Ospedale Maggiore Policlinico, 20122 Milan, Italy.
| | - Silvia Fustinoni
- EPIGET, Epidemiology, Epigenetics and Toxicology Lab, Department of Clinical Sciences and Community Health, Università Degli Studi di Milano, via San Barnaba 8, 20122 Milan, Italy.
- Occupational Medicine Unit, Fondazione Cà Granda, IRCCS Ospedale Maggiore Policlinico, 20122 Milan, Italy.
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14
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Li J, Xing X, Zhang X, Liang B, He Z, Gao C, Wang S, Wang F, Zhang H, Zeng S, Fan J, Chen L, Zhang Z, Zhang B, Liu C, Wang Q, Lin W, Dong G, Tang H, Chen W, Xiao Y, Li D. Enhanced H3K4me3 modifications are involved in the transactivation of DNA damage responsive genes in workers exposed to low-level benzene. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 234:127-135. [PMID: 29175474 DOI: 10.1016/j.envpol.2017.11.042] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 11/03/2017] [Accepted: 11/09/2017] [Indexed: 05/18/2023]
Abstract
In this study, we explore whether altered global histone modifications respond to low-level benzene exposure as well as their association with the hematotoxicity. We recruited 147 low-level benzene-exposed workers and 122 control workers from a petrochemical factory in Maoming City, Guangdong Province, China. The internal exposure marker level, urinary S-phenylmercapturic acid (SPMA), in benzene-exposed workers was 1.81-fold higher than that of the controls (P < 0.001). ELISA method was established to examine the specific histone modifications in human peripheral blood lymphocytes (PBLCs) of workers. A decrease in the counts of white blood cells (WBC), neutrophils, lymphocytes, and monocytes appeared in the benzene-exposed group (all P < 0.05) compared to the control group. Global trimethylated histone 3 lysine 4 (H3K4me3) modification was enhanced in the benzene-exposed group (P < 0.05) and was positively associated with the concentration of urinary SPMA (β = 0.103, P = 0.045) and the extent of DNA damage (% Tail DNA: β = 0.181, P = 0.022), but was negatively associated with the leukocyte count (WBC: β = -0.038, P = 0.023). The in vitro study revealed that H3K4me3 mark was enriched in the promoters of several DNA damage responsive (DDR) genes including CRY1, ERCC2, and TP53 in primary human lymphocytes treated with hydroquinone. Particularly, H3K4me3 modification was positively correlated with the expression of CRY1 in the PBLCs of benzene-exposed workers. These observations indicate that H3K4me3 modification might mediate the transcriptional regulation of DDR genes in response to low-dose benzene exposure.
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Affiliation(s)
- Jie Li
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Xiumei Xing
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Xinjie Zhang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Boxuan Liang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Zhini He
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Chen Gao
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Shan Wang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Fangping Wang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Haiyan Zhang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Shan Zeng
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Junling Fan
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Liping Chen
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Zhengbao Zhang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Bo Zhang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Caixia Liu
- Shantou Medical College, Shantou University, Guangdong, China
| | - Qing Wang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Weiwei Lin
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Guanghui Dong
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Huanwen Tang
- Department of Toxicology, School of Public Health, Guangdong Medical University, Guangdong, China
| | - Wen Chen
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Yongmei Xiao
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Daochuan Li
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China.
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15
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Jiménez-Garza O, Guo L, Byun HM, Carrieri M, Bartolucci GB, Barrón-Vivanco BS, Baccarelli AA. Aberrant promoter methylation in genes related to hematopoietic malignancy in workers exposed to a VOC mixture. Toxicol Appl Pharmacol 2017; 339:65-72. [PMID: 29217486 DOI: 10.1016/j.taap.2017.12.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/30/2017] [Accepted: 12/03/2017] [Indexed: 12/20/2022]
Abstract
Occupational exposure to volatile organic compounds (VOCs) may cause hematopoietic malignancy, either by single exposure to benzene or possibly due to a concomitant exposure to several VOCs. Since oxidative stress, inflammation and DNA repair pathways are closely involved in cancer development, the effect of VOC exposure on expression of proteins involved in these pathways has been studied, but epigenetic changes have not been well described. Here, DNA methylation status following occupational exposure to a VOC mixture was assessed by bisulfite sequencing of the promoter regions of seven genes involved in the mentioned pathways. Peripheral blood samples and individual-level VOC exposure data were obtained from healthy leather shoe factory workers (LS, n=40) and gas station attendants (GS, n=36), as well as a reference group of university employees (C, n=66). Exposure levels for acetone, ethylbenzene, methyl ethyl ketone, n-hexane, toluene and xylene were higher in LS (p<0.001); benzene and methyl acetate levels were higher in GS (p<0.001). TOP2A, SOD1, and TNF-α promoter methylation status was increased in LS (p<0.05). In LS, we also found significant correlations between GSTP1 promoter methylation and both iNOS (r=0.37, p=0.008) and COX-2 (r=-0.38, p=0.007) methylation. In exposed groups, ethylbenzene exposure levels showed a significant correlation with TOP2A methylation (β=0.33). Our results show early, toxic effects at the epigenetic level caused by occupational exposure to high levels of a VOC mixture. These subcellular modifications may represent the initial mechanism of toxicity leading to hematopoietic malignancy, possibly due to a synergistic, hematotoxic effect of VOC mixtures.
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Affiliation(s)
- Octavio Jiménez-Garza
- Health Sciences Division, University of Guanajuato, León, Campus. Blvd. Puente del Mienio 1001, Fracción del Predio San Carlos, C.P. 37670 León Guanajuato, Mexico.
| | - Liqiong Guo
- Department of Occupational & Environmental Health, Tianjin Medical University, No.22 Qixiangtai Road, Heping District, Tianjin 300070, China
| | - Hyang-Min Byun
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE4 5PL, United Kingdom
| | - Mariella Carrieri
- Department of Cardiologic, Thoracic and Vascular Science, University of Padova, Via Giustiniani, 2, 35128 Padova, Italy
| | - Giovanni Battista Bartolucci
- Department of Cardiologic, Thoracic and Vascular Science, University of Padova, Via Giustiniani, 2, 35128 Padova, Italy
| | - Briscia Socorro Barrón-Vivanco
- The Laboratory of Environmental Toxicology and Pollution, Autonomous University of Nayarit, Av de la Cultura Amado Nervo S/N, CP 36000 Tepic, Nayarit, Mexico
| | - Andrea A Baccarelli
- The Laboratory of Human Environmental Epigenetics, Harvard T.H. Chan School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA
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16
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Moshammer H, Poteser M. Comment on Zheng et al. Association between Promoter Methylation of Gene ERCC3 and Benzene Hematotoxicity. Int. J. Environ. Res. Public Health 2017, 14, 921. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:E1393. [PMID: 29144381 PMCID: PMC5708032 DOI: 10.3390/ijerph14111393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 11/10/2017] [Accepted: 11/10/2017] [Indexed: 11/23/2022]
Abstract
Benzene is an established carcinogenic substance [1,2].[...].
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Affiliation(s)
- Hanns Moshammer
- Department of Environmental Health, Medical University of Vienna, ZPH, Kinderspitalgasse 15, 1090 Vienna, Austria.
| | - Michael Poteser
- Department of Environmental Health, Medical University of Vienna, ZPH, Kinderspitalgasse 15, 1090 Vienna, Austria.
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17
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Jiménez-Garza O, Guo L, Byun HM, Carrieri M, Bartolucci GB, Zhong J, Baccarelli AA. Promoter methylation status in genes related with inflammation, nitrosative stress and xenobiotic metabolism in low-level benzene exposure: Searching for biomarkers of oncogenesis. Food Chem Toxicol 2017; 109:669-676. [DOI: 10.1016/j.fct.2017.08.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 08/15/2017] [Indexed: 12/13/2022]
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18
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Zheng M, Lin F, Hou F, Li G, Zhu C, Xu P, Xing C, Wang Q. Association between Promoter Methylation of Gene ERCC3 and Benzene Hematotoxicity. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14080921. [PMID: 28813025 PMCID: PMC5580623 DOI: 10.3390/ijerph14080921] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 07/21/2017] [Accepted: 07/24/2017] [Indexed: 12/12/2022]
Abstract
Benzene is a primary industrial chemical and a ubiquitous environmental pollutant. ERCC3 is a key player in nucleotide excision repair. Recent studies suggested that site-specific methylation is a possible mechanism of the transcriptional dysregulation by blocking transcription factors binding. We previously found that the average promoter methylation level of ERCC3 was increased in benzene-exposed workers. In order to test whether specific CpG sites of ERCC3 play an important role in benzene-induced epigenetic changes and whether the specific methylation patterns are associated with benzene hematotoxicity, we analyzed the promoter methylation levels of individual CpG sites, transcription factor binding motif and the correlation between aberrant CpG methylation and hematotoxicity in 76 benzene-exposed workers and 24 unexposed controls in China. Out of all the CpGs analyzed, two CpG units located 43 bp upstream and 99 bp downstream of the transcription start site of ERCC3 (CpG 2–4 and CpG 17–18, respectively), showed the most pronounced increase in methylation levels in benzene-exposed workers, compared with unexposed controls (Mean ± SD: 5.86 ± 2.77% vs. 4.92 ± 1.53%, p = 0.032; 8.45 ± 4.09% vs. 6.79 ± 2.50%, p = 0.024, respectively). Using the JASPAR CORE Database, we found that CpG 2–4 and CpG 17–18 were bound by three putative transcription factors (TFAP2A, E2F4 and MZF1). Furthermore, the methylation levels for CpG 2–4 were correlated negatively with the percentage of neutrophils (β = −0.676, p = 0.005) in benzene-exposed workers. This study demonstrates that CpG-specific DNA methylation in the ERCC3 promoter region may be involved in benzene-induced epigenetic modification and it may contribute to benzene-induced hematotoxicity.
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Affiliation(s)
- Min Zheng
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
| | - Feiliang Lin
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
- Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, China.
- Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu 610041, China.
| | - Fenxia Hou
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
| | - Guilan Li
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
| | - Caiying Zhu
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital and Center for Stem Cell Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300020, China.
| | - Peiyu Xu
- Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu 610041, China.
| | - Caihong Xing
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
| | - Qianfei Wang
- Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, China.
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19
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Li J, Zhang X, He Z, Sun Q, Qin F, Huang Z, Zhang X, Sun X, Liu L, Chen L, Gao C, Wang S, Wang F, Li D, Zeng X, Deng Q, Wang Q, Zhang B, Tang H, Chen W, Xiao Y. MGMT hypomethylation is associated with DNA damage in workers exposed to low-dose benzene. Biomarkers 2017; 22:470-475. [DOI: 10.1080/1354750x.2016.1274335] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jie Li
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Xinjie Zhang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Zhini He
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Qing Sun
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Fei Qin
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Zhenlie Huang
- Guangdong Provincial Key Laboratory of Occupational Disease Prevention and Treatment, Guangdong Province Hospital for Occupational Disease Prevention and Treatment, Guangzhou, China
| | - Xiao Zhang
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xin Sun
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Linhua Liu
- Department of Toxicology, School of Public Health, Guangdong Medical University, Guangzhou, China
| | - Liping Chen
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Chen Gao
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Shan Wang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Fangping Wang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Daochuan Li
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Xiaowen Zeng
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Qifei Deng
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Qing Wang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Bo Zhang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Huanwen Tang
- Department of Toxicology, School of Public Health, Guangdong Medical University, Guangzhou, China
| | - Wen Chen
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Yongmei Xiao
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
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Khlifi R, Olmedo P, Gil F, Hammami B, Hamza-Chaffai A, Rebai A. Gene-environment interactions between ERCC2, ERCC3, XRCC1 and cadmium exposure in nasal polyposis disease. J Appl Genet 2016; 58:221-229. [PMID: 27838878 DOI: 10.1007/s13353-016-0375-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2016] [Revised: 11/01/2016] [Accepted: 11/03/2016] [Indexed: 11/27/2022]
Abstract
Gene-environment interactions have long been known to play an important role in complex disease aetiology, such as nasal polyposis (NP). The present study supports the concept that DNA repair gene polymorphisms play critical roles in modifying individual susceptibility to environmental diseases. In fact, we investigated the role of polymorphisms in DNA repair genes and cadmium as risk factors for Tunisian patients with NP. To the best of our knowledge, this is the first report on the impact of combined effects of cadmium and ERCC3 7122 A>G (rs4150407), ERCC2 Lys751Gln (rs13181) and XRCC1 Arg399Gln (rs25487) genes in the susceptibility to NP disease. Significant associations between the risk of developing NP disease and ERCC2 [odds ratio (OR) = 2.0, 95 % confidence interval (CI) = 1.1-3.7, p = 0.023] and ERCC3 (OR = 2.2, 95 % CI = 1.2-4.1, p = 0.013) genotypes polymorphisms were observed. Blood concentrations of Cd in NP patients (2.2 μg/L) were significantly higher than those of controls (0.5 μg/L). A significant interaction between ERCC3 (7122 A>G) polymorphism and blood-Cd levels (for the median of blood-Cd levels: OR = 3.8, 95 % CI = 1.3-10.8, p = 0.014 and for the 75th percentiles of blood-Cd levels: OR = 2.7, 95 % CI = 1.1-7.2, p = 0.041) was found in association with the risk of NP disease. In addition, when we stratified ERCC2, ERCC3 and XRCC1 polymorphism genotypes by the median and 75th percentiles of blood-Cd levels, we found also significant interactions between ERCC2 (Lys751Gln) and ERCC3 (7122 A>G) genotypes polymorphism and this metal in association with NP disease. However, no interaction was found between XRCC1 (Arg399Gln) polymorphism genotypes and Cd in association with NP disease.
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Affiliation(s)
- Rim Khlifi
- Unit of Marine and Environmental Toxicology, UR 09-03, Institut Préparatoire aux Etudes d'Ingénieur de Sfax (IPEIS), Sfax, Tunisia.
- Laboratory of Molecular and Cellular Screening Processes, Centre of Biotechnology of Sfax, Sfax, Tunisia.
| | - Pablo Olmedo
- Department of Legal Medicine and Toxicology, University of Granada, Granada, Spain
| | - Fernando Gil
- Department of Legal Medicine and Toxicology, University of Granada, Granada, Spain
| | - Boutheina Hammami
- Department of Otorhinolaryngology, Habib Bourguiba Hospital, Sfax, Tunisia
| | - Amel Hamza-Chaffai
- Unit of Marine and Environmental Toxicology, UR 09-03, Institut Préparatoire aux Etudes d'Ingénieur de Sfax (IPEIS), Sfax, Tunisia
| | - Ahmed Rebai
- Laboratory of Molecular and Cellular Screening Processes, Centre of Biotechnology of Sfax, Sfax, Tunisia
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Tang KY, Yu CH, Jiang L, Gong M, Liu WJ, Wang Y, Cui NX, Song W, Sun Y, Yi ZC. Long-term exposure of K562 cells to benzene metabolites inhibited erythroid differentiation and elevated methylation in erythroid specific genes. Toxicol Res (Camb) 2016; 5:1284-1297. [PMID: 30090432 DOI: 10.1039/c6tx00143b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 06/28/2016] [Indexed: 12/18/2022] Open
Abstract
Benzene is a common occupational hazard and a widespread environmental pollutant. Previous studies have revealed that 72 h exposure to benzene metabolites inhibited hemin-induced erythroid differentiation of K562 cells accompanied with elevated methylation in erythroid specific genes. However, little is known about the effects of long-term and low-dose benzene metabolite exposure. In this study, to elucidate the effects of long-term benzene metabolite exposure on erythroid differentiation, K562 cells were treated with low-concentration phenol, hydroquinone and 1,2,4-benzenetriol for at least 3 weeks. After exposure of K562 cells to benzene metabolites, hemin-induced hemoglobin synthesis declined in a concentration- and time-dependent manner, and the hemin-induced expressions of α-, β- and γ-globin genes and heme synthesis enzyme porphobilinogen deaminase were significantly suppressed. Furthermore, when K562 cells were continuously cultured without benzene metabolites for another 20 days after exposure to benzene metabolites for 4 weeks, the decreased erythroid differentiation capabilities still remained stable in hydroquinone- and 1,2,4-benzenetriol-exposed cells, but showed a slow increase in phenol-exposed K562 cells. In addition, methyltransferase inhibitor 5-aza-2'-deoxycytidine significantly blocked benzene metabolites inhibiting hemoglobin synthesis and expression of erythroid genes. Quantitative MassARRAY methylation analysis also confirmed that the exposure to benzene metabolites increased DNA methylation levels at several CpG sites in several erythroid-specific genes and their far-upstream regulatory elements. These results demonstrated that long-term and low-dose exposure to benzene metabolites inhibited the hemin-induced erythroid differentiation of K562 cells, in which DNA methylation played a role through the suppression of erythroid specific genes.
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Affiliation(s)
- K Y Tang
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China . .,State Key Laboratory of Transducer Technology , Chinese Academy of Sciences , Beijing , China
| | - C H Yu
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - L Jiang
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - M Gong
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - W J Liu
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - Y Wang
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - N X Cui
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - W Song
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
| | - Y Sun
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China . .,State Key Laboratory of Transducer Technology , Chinese Academy of Sciences , Beijing , China
| | - Z C Yi
- School of Biological Science and Medical Engineering , Beihang University , Beijing 100191 , China .
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22
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Hu G, Li P, Li Y, Wang T, Gao X, Zhang W, Jia G. Methylation levels of P16 and TP53 that are involved in DNA strand breakage of 16HBE cells treated by hexavalent chromium. Toxicol Lett 2016; 249:15-21. [DOI: 10.1016/j.toxlet.2016.03.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 01/19/2016] [Accepted: 03/07/2016] [Indexed: 01/10/2023]
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23
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Carbonari D, Chiarella P, Mansi A, Pigini D, Iavicoli S, Tranfo G. Biomarkers of susceptibility following benzene exposure: influence of genetic polymorphisms on benzene metabolism and health effects. Biomark Med 2016; 10:145-63. [PMID: 26764284 DOI: 10.2217/bmm.15.106] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Benzene is a ubiquitous occupational and environmental pollutant. Improved industrial hygiene allowed airborne concentrations close to the environmental context (1-1000 µg/m(3)). Conversely, new limits for benzene levels in urban air were set (5 µg/m(3)). The biomonitoring of exposure to such low benzene concentrations are performed measuring specific and sensitive biomarkers such as S-phenylmercapturic acid, trans, trans-muconic acid and urinary benzene: many studies referred high variability in the levels of these biomarkers, suggesting the involvement of polymorphic metabolic genes in the individual susceptibility to benzene toxicity. We reviewed the influence of metabolic polymorphisms on the biomarkers levels of benzene exposure and effect, in order to understand the real impact of benzene exposure on subjects with increased susceptibility.
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Affiliation(s)
- Damiano Carbonari
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
| | - Pieranna Chiarella
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
| | - Antonella Mansi
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
| | - Daniela Pigini
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
| | - Sergio Iavicoli
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
| | - Giovanna Tranfo
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
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Ravegnini G, Sammarini G, Hrelia P, Angelini S. Key Genetic and Epigenetic Mechanisms in Chemical Carcinogenesis. Toxicol Sci 2015; 148:2-13. [DOI: 10.1093/toxsci/kfv165] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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CYP2E1 epigenetic regulation in chronic, low-level toluene exposure: Relationship with oxidative stress and smoking habit. Toxicol Appl Pharmacol 2015; 286:207-15. [DOI: 10.1016/j.taap.2015.04.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Revised: 04/08/2015] [Accepted: 04/29/2015] [Indexed: 12/31/2022]
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26
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Václavíková R, Hughes DJ, Souček P. Microsomal epoxide hydrolase 1 (EPHX1): Gene, structure, function, and role in human disease. Gene 2015. [PMID: 26216302 DOI: 10.1016/j.gene.2015.07.071] [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] [Indexed: 01/14/2023]
Abstract
Microsomal epoxide hydrolase (EPHX1) is an evolutionarily highly conserved biotransformation enzyme for converting epoxides to diols. Notably, the enzyme is able to either detoxify or bioactivate a wide range of substrates. Mutations and polymorphic variants in the EPHX1 gene have been associated with susceptibility to several human diseases including cancer. This review summarizes the key knowledge concerning EPHX1 gene and protein structure, expression pattern and regulation, and substrate specificity. The relevance of EPHX1 for human pathology is especially discussed.
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Affiliation(s)
- Radka Václavíková
- Toxicogenomics Unit, National Institute of Public Health, Prague, Czech Republic
| | - David J Hughes
- Centre for Systems Medicine, Department of Physiology, Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - Pavel Souček
- Toxicogenomics Unit, National Institute of Public Health, Prague, Czech Republic; Biomedical Centre, Faculty of Medicine in Plzen, Charles University in Prague, Plzen, Czech Republic.
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Ye LL, Zhang GH, Huang JW, Li Y, Zheng GQ, Zhang DT, Zhou LF, Tao XD, Zhang J, Ye YJ, Sun P, Frank A, Xia ZL. Are polymorphisms in metabolism protective or a risk for reduced white blood cell counts in a Chinese population with low occupational benzene exposures? INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HEALTH 2015; 21:232-40. [PMID: 26179485 DOI: 10.1179/2049396714y.0000000091] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
BACKGROUND Genetic variations in metabolic enzyme genes may enhance hematotoxicity in benzene-exposed populations. OBJECTIVE To investigate the association between polymorphisms of metabolism genes and white blood cells (WBCs). METHODS Three hundred and eighty-five benzene-exposed workers and 220 unexposed indoor workers were recruited in China. We explored the relationship between metabolic enzymes polymorphisms [glutathione S-transferase T1/M1 (GSTT1/M1) null, glutathione S-transferase P1 (GSTP1)rs1695, Cytochrome P450 2E1 (CYP2E1) rs3813867, rs2031920, rs6413432, microsomal epoxide hydrolase (mEH) rs1051740, rs2234922] by polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) analysis and WBC. RESULTS The exposed group had lower WBC counts (P<0·001) than the unexposed group. Increased susceptibility to hematotoxicity, as evidenced by lower WBC counts, was found in workers with null-GSTT1 (P = 0·045), null-GSTM1 (P = 0·030), rs2031920 (P = 0·020), and rs3813867 (P = 0·014) genotypes. White blood cell counts were also lower in workers with null-GSTT1 and null-GSTM after adjusting for age, gender, smoking, and alcohol consumption. CONCLUSION Null-GSTT1 and null-GSTM1 genotypes and Cytochrome P4502E1 (CYP2E1: rs2031920, rs3813867) may support the hematotoxicity of benzene-exposed workers in China, and we can make use of it to select susceptible population.
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Yang J, Bai WL, Chen YJ, Gao A. 1,4-benzoquinone-induced STAT-3 hypomethylation in AHH-1 cells: Role of oxidative stress. Toxicol Rep 2015; 2:864-869. [PMID: 28962422 PMCID: PMC5598509 DOI: 10.1016/j.toxrep.2015.05.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 05/13/2015] [Accepted: 05/29/2015] [Indexed: 11/19/2022] Open
Abstract
Benzene, a known occupational and environmental contaminant, is associated with increased risk of leukemia. The objectives of this study were to elucidate the regulatory mechanism of the hypomethylated STAT3 involved in benzene toxicity in vitro. As 1,4-benzoquinone (1,4-BQ) is one of benzene’s major toxic metabolites, AHH-1 cells were treated by 1,4-BQ for 24 h with or without pretreatment of the antioxidant a-LA or the methyltransferase inhibitor, 5-aza-2′ deoxycytidine (5-aza). The cell viability was investigated using the 3-(4, 5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. ROS was determined via 2′,7′-dichlorodihydrofluorescein diacetate (DCFDA) flow cytometric assays. The level of oxidative stress marker 8-OHdG was measured by enzyme-linked immunosorbent assay. Methylation-specific PCR was used to detect the methylation status of STAT3. Results indicated the significantly increasing expression of ROS and 8-OHdG which accompanied with STAT3 hypomethylation in 1,4-BQ-treated AHH-1 cells. α-LA suppressed the expression of both ROS and 8-OHdG, simultaneously reversed 1,4-BQ-induced STAT3 hypomethylation. However, although the methylation inhibitor, 5-aza reduced the expression level of ROS and 8-OHdG, but had no obvious inhibiting effect on STAT3 methylation level. Taken together, oxidative stress are involved 1,4-BQ-induced STAT3 methylation expression.
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Key Words
- 1,4-BQ, 1,4-benzoquinone
- 1,4-benzoquinone
- 5-aza, 5-aza-2′ deoxycytidine
- 8-OHdG, 8-hydroxy deoxyguanosine adduct
- DCFH-DA, 2,7-dichlorofluorescein diacetate
- DMSO, dimethylsulfoxide
- DNMT, DNA methyltransferase
- ELISA, enzyme-linked immunosorbent assay
- MSP, methylation-specific PCR
- Methylation
- Oxidative stress
- PBS, phosphate buffered saline
- ROS, reactive oxygen species
- STAT3
- α-LA, alpha lipoic acid
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Affiliation(s)
- Jing Yang
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Wen-lin Bai
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Yu-jiao Chen
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Ai Gao
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
- Corresponding author at: Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China. Tel.: +86 10 83911509.
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Abstract
Scientists have long considered genetics to be the key mechanism that alters gene expression because of exposure to the environment and toxic substances (toxicants). Recently, epigenetic mechanisms have emerged as an alternative explanation for alterations in gene expression resulting from such exposure. The fact that certain toxic substances that contribute to tumor development do not induce mutations probably results from underlying epigenetic mechanisms. The field of toxicoepigenomics emerged from the combination of epigenetics and classical toxicology. High-throughput technologies now enable evaluation of altered epigenomic profiling in response to toxins and environmental pollutants. Furthermore, differences in the epigenomic backgrounds of individuals may explain why, although whole populations are exposed to toxicants, only a few people in a population develop cancer. Metals in the environment and toxic substances not only alter DNA methylation patterns and histone modifications but also affect enzymes involved in posttranslational modifications of proteins and epigenetic regulation, and thereby contribute to carcinogenesis. This article describes different toxic substances and environmental pollutants that alter epigenetic profiling and discusses how this information can be used in screening populations at high risk of developing cancer. Research opportunities and challengers in the field also are discussed.
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Affiliation(s)
- Mukesh Verma
- Methods and Technologies Branch, Epidemiology and Genomics Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, National Institutes of Health (NIH), 9609 Medical Center Drive, Room 4E102, Rockville, MD, 20850, USA,
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O’Hagan HM. Chromatin modifications during repair of environmental exposure-induced DNA damage: a potential mechanism for stable epigenetic alterations. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2014; 55:278-91. [PMID: 24259318 PMCID: PMC4020002 DOI: 10.1002/em.21830] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 10/31/2013] [Accepted: 10/31/2013] [Indexed: 05/22/2023]
Abstract
Exposures to environmental toxicants and toxins cause epigenetic changes that likely play a role in the development of diseases associated with exposure. The mechanism behind these exposure-induced epigenetic changes is currently unknown. One commonality between most environmental exposures is that they cause DNA damage either directly or through causing an increase in reactive oxygen species, which can damage DNA. Like transcription, DNA damage repair must occur in the context of chromatin requiring both histone modifications and ATP-dependent chromatin remodeling. These chromatin changes aid in DNA damage accessibility and signaling. Several proteins and complexes involved in epigenetic silencing during both development and cancer have been found to be localized to sites of DNA damage. The chromatin-based response to DNA damage is considered a transient event, with chromatin being restored to normal as DNA damage repair is completed. However, in individuals chronically exposed to environmental toxicants or with chronic inflammatory disease, repeated DNA damage-induced chromatin rearrangement may ultimately lead to permanent epigenetic alterations. Understanding the mechanism behind exposure-induced epigenetic changes will allow us to develop strategies to prevent or reverse these changes. This review focuses on epigenetic changes and DNA damage induced by environmental exposures, the chromatin changes that occur around sites of DNA damage, and how these transient chromatin changes may lead to heritable epigenetic alterations at sites of chronic exposure.
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Affiliation(s)
- Heather M. O’Hagan
- Medical Sciences, Indiana University School of Medicine, Bloomington, IN
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