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Hu J, Liu J, Lv X, Yu L, Lan S, Li Y, Yang Y. Assessment of epigenotoxic profiles of Dongjiang River: A comprehensive of chemical analysis, in vitro bioassay and in silico approach. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 282:116961. [PMID: 33823309 DOI: 10.1016/j.envpol.2021.116961] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 03/01/2021] [Accepted: 03/13/2021] [Indexed: 06/12/2023]
Abstract
This research explored the occurrence, epigenetic toxic profiling and main toxic pollutants of POPs in surface water of Dongjiang River, southern China. The concentrations of selected POPs including polycyclic aromatic hydrocarbons (PAHs), endocrine disrupting chemicals (EDCs), phthalate esters (PAEs) and polybrominated diphenyl ethers (PBDEs) of surface water from 18 sites were investigated. ∑16PAHs and ∑4EDCs were at a moderate level, while ∑6PAEs and ∑6PBDEs had low pollution levels. PAHs, EDCs and PAEs showed higher concentrations in dry season than those in wet season, and the loading of selected POPs in tributaries was higher than those in mainstream due to intensive manufactures and lower runoff volume. Moreover, activities of DNA methyltransferase (DNMT)1, histone deacetylase (HDAC2, HDAC8) were confirmed to be sensitive indicators for epigenetic toxicity. The DNMT1-mediated epigenetic equivalency toxicity of organic extracts in Dongjiang River were more serious than those of HDAC2 and HDAC8. Correlation analysis shown binding affinity between POPs and DNMT1, HDAC2 and HDAC8 could be regarded as toxic equivalency factors. Risk assessment suggested that 4-nonylphenol and bisphenol A were the largest contributors to epigenetic risk. This study is the first attempt to quantify epigenetic toxicity and epigenetic risk evaluation of river water.
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Affiliation(s)
- Junjie Hu
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, Guangdong, PR China
| | - Jinhuan Liu
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, Guangdong, PR China
| | - Xiaomei Lv
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, Guangdong, PR China
| | - Lili Yu
- Shenzhen People's Hospital, The 2nd Clinical Medical College of Jinan University, Shenzhen, 518020, China
| | - Shanhong Lan
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, Guangdong, PR China
| | - Yanliang Li
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, Guangdong, PR China
| | - Yan Yang
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, Guangdong, PR China; Synergy Innovation Institute of GDUT, Shantou, 515041, PR China.
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Zhang W, Guo C, Wang XL, Lv ZL, Fan L, Yang YY, Li X, Qi J, Zhao SL, Wang XL. Double-endpoint Genotoxicity Quantification and PAHs Characterization of Drinking Water Source alongside Polluted Yinghe River with High Tumor Mortality. Curr Med Sci 2021; 41:189-198. [PMID: 33877535 DOI: 10.1007/s11596-021-2336-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 02/10/2021] [Indexed: 11/26/2022]
Abstract
The etiology for the high tumor mortality in heavy polluted Yinghe river basin is still unclear and polycyclic aromatic hydrocarbons (PAHs) belong to the priority pollutants in water based on the former surveillance data. In order to explore the potential genotoxicants contributing to the double-endpoint genotoxicity of polluted drinking water source, 12 groundwater and 3 surface water samples were collected from 3 villages and the nearby rivers alongside Yinghe river basin, respectively and their comprehensive genotoxicity was estimated with a bioassay group of SOS/umu test and micronucleus (MN) test (MNT). Some groundwater samples showed positive genotoxicity and all surface water samples were highly genotoxic. Eight groundwater samples showed DNA genotoxic effect with the average 4-NQO equivalent concentration (TEQ(4-NQO)) of 0.067 µg/L and 0.089 µg/L in wet and dry season, respectively. The average MN ratios of groundwater samples were 14.19‰ and 17.52‰ in wet and dry season, respectively. Groundwater samples showed different genotoxic effect among 3 villages. The total PAHs concentrations in all water samples ranged from 8.98 to 25.17 ng/L with an average of 14.97±4.85 ng/L. BaA, CHR, BkF, BaP and DBA were the main carcinogenic PAHs contributing to the genotoxicity of water samples. In conclusion, carcinogenic PAHs are possibly related to the high tumor mortality in the target area. Characterization of carcinogenic PAHs to genotoxicity of drinking water source may shed light on the etiology study for high tumor mortality in Yinghe river basin.
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Affiliation(s)
- Wei Zhang
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, China CDC Key Laboratory of Environment and Population Health, Beijing, 100021, China
| | - Chen Guo
- China State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Xiao-Li Wang
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing, 100124, China
| | - Zhan-Lu Lv
- China State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Lin Fan
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, China CDC Key Laboratory of Environment and Population Health, Beijing, 100021, China
| | - Yu-Yan Yang
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, China CDC Key Laboratory of Environment and Population Health, Beijing, 100021, China
| | - Xu Li
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, China CDC Key Laboratory of Environment and Population Health, Beijing, 100021, China
| | - Jing Qi
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, China CDC Key Laboratory of Environment and Population Health, Beijing, 100021, China
| | - Shu-Li Zhao
- China National Environmental Monitoring Center, Beijing, 100012, China
| | - Xian-Liang Wang
- National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, China CDC Key Laboratory of Environment and Population Health, Beijing, 100021, China.
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Hu J, Liu J, Li J, Lv X, Yu L, Wu K, Yang Y. Metal contamination, bioaccumulation, ROS generation, and epigenotoxicity influences on zebrafish exposed to river water polluted by mining activities. JOURNAL OF HAZARDOUS MATERIALS 2021; 405:124150. [PMID: 33131937 DOI: 10.1016/j.jhazmat.2020.124150] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 09/27/2020] [Accepted: 09/28/2020] [Indexed: 06/11/2023]
Abstract
Epigenetic mechanisms are important for gene expression regulation, which is closely related to human health, and epigenetic effects of polluted water bodies have gained increasing research attention. Le'an River suffers from severe trace metal pollution owing to mining activities. In this study, zebrafish was used as a biological model to study pollution of Le'an River after seven consecutive days of exposure. The results showed that midstream and downstream sections of the river were seriously polluted by trace metals. The liver and gill of zebrafish were enriched with trace metals, and cadmium had the highest bioaccumulation factor. Trace metals caused oxidative stress in zebrafish cells, with increases in reactive oxygen species levels. Significant increase of global DNA methylation in liver of middle and downstream section were observed, with values from 125.67% to 165.45% compared with control. Changes in DNA methylation in the promoter region cause significant increase or decrease of the expression of repair genes and apoptosis genes in liver and gill. In summary, Le'an River water exhibited significant epigenetic effects, and it is necessary to consider epigenetic effects in the evaluation of pollution and health risks of river water.
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Affiliation(s)
- Junjie Hu
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808 Guangdong, PR China
| | - Jinhuan Liu
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808 Guangdong, PR China
| | - Jinyun Li
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808 Guangdong, PR China
| | - Xiaomei Lv
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808 Guangdong, PR China
| | - Lili Yu
- Shenzhen People's Hospital, The 2nd Clinical Medical College of Jinan University, Shenzhen 518020, PR China
| | - Kangming Wu
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808 Guangdong, PR China
| | - Yan Yang
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, Guangdong, PR China; Synergy Innovation Institute of GDUT, Shantou 515041, PR China.
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Hu J, Yu Y. Epigenetic response profiles into environmental epigenotoxicant screening and health risk assessment: A critical review. CHEMOSPHERE 2019; 226:259-272. [PMID: 30933735 DOI: 10.1016/j.chemosphere.2019.03.096] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 03/06/2019] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
The epigenome may be an important interface between exposure to environmental contaminants and adverse outcome on human health. Many environmental pollutants deregulate gene expression and promote diseases by modulating the epigenome. Adverse epigenetic responses have been widely used for risk assessment of chemical substances. Various pollutants, including trace elements and persistent organic pollutants, have been detected frequently in the environment. Epigenetic toxicity of environmental matrices including water, air, soil, and food cannot be ignored. This review provides a comprehensive overview of epigenetic effects of pollutants and environmental matrices. We start with an overview of the mechanisms of epigenetic regulation and the effects of several types of environmental pollutants (trace elements, persistent organic pollutants, endocrine disrupting chemicals, and volatile organic pollutants) on epigenetic modulation. We then discuss the epigenetic responses to environmental water, air, and soil based on in vivo and in vitro assays. Finally, we discuss recommendations to promote the incorporation of epigenotoxicity into contamination screening and health risk assessment.
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Affiliation(s)
- Junjie Hu
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, Guangdong, PR China
| | - Yingxin Yu
- Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, Guangdong, PR China.
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