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Wang W, Zhang F, Zhang Y, Xu L, Pei Y, Niu J. Liquid-phase hydrodechlorination of trichloroethylene driven by nascent H 2 under an open system: Hydrogenation activity, solvent effect and sulfur poisoning. J Environ Sci (China) 2021; 108:96-106. [PMID: 34465441 DOI: 10.1016/j.jes.2021.02.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 02/10/2021] [Accepted: 02/10/2021] [Indexed: 06/13/2023]
Abstract
Hydrodechlorination is a promising technology for the remediation of water body contaminated with trichloroethylene (TCE). In this work, the liquid-phase hydrogenation of TCE by Raney Ni (R-Ni) and Pd/C under an open system have been studied, in which nascent H2 (Nas-H2) generated in situ from the cathode acted as a hydrogen source. Experimental results showed that TCE was completely eliminate from the solution through the synergistic effects of hydrodechlorination and air flotation due to the formation of continuous micro/nano-sized Nas-H2 bubbles from the cathode. Furthermore, the effects of inorganic anions and organic solvents on R-Ni and Pd/C hydrogenation activity were investigated, respectively. The results showed that NO3- and acetonitrile can form a competitive reaction with TCE; Sulfur with lone-pair electrons will cause irreversible poisoning to these two catalysts, and have a stronger inhibitory effect on Pd/C. This work helps to realize the separation of volatile halogenated compounds from water environment and provides certain data support for the choice of catalyst in the actual liquid-phase hydrogenation system.
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Affiliation(s)
- Weilai Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Fan Zhang
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Yunfei Zhang
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Lei Xu
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Yuansheng Pei
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Junfeng Niu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China.
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2
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Controlled polyethylene glycol and activated carbon interaction with nanoscale zerovalent iron for trichloroethylene degradation. J Taiwan Inst Chem Eng 2020. [DOI: 10.1016/j.jtice.2020.11.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Ren F, Wang J, Aniagu S, Li J, Jiang Y, Chen T. Effects of Trichloroethylene on the Expression of Long Intergenic Noncoding RNAs in B6C3F1 Mouse Liver. Chem Res Toxicol 2020; 33:1356-1363. [PMID: 31942800 DOI: 10.1021/acs.chemrestox.9b00382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Trichloroethylene (TCE), a widely used industrial solvent, is a common environmental contaminant. We previously reported that TCE-induced changes in DNA methylation and miRNA expression contributed to the development of a liver tumor in mice. In this study, we investigated the role of long intergenic noncoding RNA (LincRNA), another type of epigenetic modification, in TCE hepatocarcinogenesis. Male B6C3F1 mice were gavaged with TCE at dose levels of 0, 100, 500, and 1000 mg/kg b.w. for 5 days. The expression changes of LincRNAs in liver samples from control and TCE-exposed mice were screened by microarray. When compared to the control group, 21 and 29 LincRNAs were upregulated and downregulated, respectively, in the liver of mice exposed to TCE at 1000 mg/kg b.w. In addition, TCE treatment increased the expression levels of LincRNA-GM8704 but decreased the expression levels of LiverLincs_chr17_4383_2 in a dose-dependent manner. We further found that the mRNAs that are highly correlated with the expression of LiverLincs_chr17_4383_2 are involved in a number of cancer-related signaling pathways including PPARs, cell cycle, and ErbB and p53 signaling pathways. Among the expression-correlated mRNAs, Cdkn1a was found to be a downstream target gene of LiverLincs_chr17_4383_2. To follow up on that, we also found that miR-182-5p might mediate the association between downregulation of LiverLincs_chr17_4383_2 and upregulation of Cdkn1a, leading to increased cell proliferation in TCE exposed liver cells. In conclusion, TCE induced extensive LincRNA expression changes in mouse liver, and the downregulation of LiverLincs_chr17_4383_2 might contribute to TCE hepatocarcinogenesis by interacting with miR-182-5p and Cdkn1a.
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Affiliation(s)
- Fei Ren
- Medical College, Soochow University, Suzhou 215123, China.,Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, China
| | - Jin Wang
- Medical College, Soochow University, Suzhou 215123, China.,Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, China
| | - Stanley Aniagu
- Toxicology, Risk Assessment and Research Division, Texas Commission on Environmental Quality, 12015 Park 35 Circle, Austin, Texas 78753, United States
| | - Jianxiang Li
- Medical College, Soochow University, Suzhou 215123, China.,Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, China
| | - Yan Jiang
- Medical College, Soochow University, Suzhou 215123, China
| | - Tao Chen
- Medical College, Soochow University, Suzhou 215123, China.,Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, China
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Jiang Y, Li J, Ren F, Ji C, Aniagu S, Chen T. PM2.5-induced extensive DNA methylation changes in the heart of zebrafish embryos and the protective effect of folic acid. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 255:113331. [PMID: 31614245 DOI: 10.1016/j.envpol.2019.113331] [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: 06/10/2019] [Revised: 09/29/2019] [Accepted: 09/29/2019] [Indexed: 06/10/2023]
Abstract
We previously found that folic acid (FA) attenuated cardiac defects in zebrafish embryos exposed to extractable organic matter (EOM) from PM2.5, but the underlining mechanisms remain to be elucidated. Since DNA methylation is crucial to cardiac development, we hypothesized that EOM-induced aberrant DNA methylation changes could be diminished by FA supplementation. In this study, zebrafish embryos were exposed to EOM in the absence or presence of FA. Genomic-wide DNA methylation analysis identified both DNA hypo- and hyper-methylation changes in CCGG sites in zebrafish embryos exposed to EOM, which were attenuated by FA supplementation. We identified a total of 316 genes with extensive DNA methylation changes in EOM samples but little or no DNA methylation changes in EOM plus FA samples. The genes were involved in critical cellular processes and signaling pathways important for embryo development. In addition, the EOM-decreased SAM/SAH ratio was counteracted by FA supplementation. Furthermore, FA attenuated the EOM-induced changes in the expression of genes involved in the regulation of DNA methylation and in folate biosynthesis. In conclusion, our data suggest that FA supplementation protected zebrafish embryos from the cardiac developmental toxicity of PM2.5 by alleviating EOM-induced DNA methylation changes.
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Affiliation(s)
- Yan Jiang
- Medical College of Soochow University, Suzhou, China
| | - Jianxiang Li
- Medical College of Soochow University, Suzhou, China; Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, China
| | - Fei Ren
- Medical College of Soochow University, Suzhou, China; Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, China
| | - Cheng Ji
- Medical College of Soochow University, Suzhou, China
| | - Stanley Aniagu
- Toxicology, Risk Assessment and Research Division, Texas Commission on Environmental Quality, 12015 Park 35 Cir, Austin, TX, USA
| | - Tao Chen
- Medical College of Soochow University, Suzhou, China; Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University, Suzhou, China.
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5
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Jiang Y, Zhou Z, Fei R, Zhou X, Wang J, Tao Y, Li J, Chen T. Role of miR-182-5p overexpression in trichloroethylene-induced abnormal cell cycle functions in human HepG2 cells. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2019; 82:920-927. [PMID: 31524101 DOI: 10.1080/15287394.2019.1666550] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Trichloroethylene (TCE), a widely used industrial solvent, occurs frequently in the global environment. TCE was found to induce hepatocarcinogenesis in mice and one of the underlying mechanisms was reported to involve miR-182-5p overexpression. Subsequently, miR-182-5p overexpression was shown to contribute to chemical-induced enhanced cell proliferation in mouse liver cells by targeting the gene Cited2. The aim of this study was to compare our findings in mice with those in a human hepatoma cell line HepG2. Data demonstrated that TCE at 0.1mM exerted no marked effect on human hepatoma cell line HepG2 cell migration, cell cycle, apoptosis, and DNA damage, but significantly stimulated cell proliferation rate and increased mRNA expression levels of proliferating cell nuclear antigen (PCNA), a cell proliferation biomarker. In addition, TCE enhanced miR-182-5p expression levels but lowered Cited2 mRNA expression. In summary, data showed that similar to mouse liver cells, TCE exposure also upregulated cells miR-182-5p expression and inhibited Cited2 expression in human hepatoma cell line HepG2. Our results suggest that the TCE-mediated alterations in the observed cellular functions involve interaction with miR-182-5p. It is of interest that utilization of liver cancer tissues from the Cancer Genome Atlas (TCGA) database also demonstrated that upregulated miR-182-5p expression and reduced Cited2 mRNA expression was detected suggesting that TCE-induced hepatocarcinogenesis involved processes similar to those in humans.
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Affiliation(s)
- Yan Jiang
- Medical College, Soochow University , Suzhou , China
| | - Zijie Zhou
- Medical College, Soochow University , Suzhou , China
| | - Ren Fei
- Medical College, Soochow University , Suzhou , China
- Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University , Suzhou , China
| | - Xuan Zhou
- Medical College, Soochow University , Suzhou , China
| | - Jin Wang
- Medical College, Soochow University , Suzhou , China
- Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University , Suzhou , China
| | - Yizhou Tao
- Medical College, Soochow University , Suzhou , China
- Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University , Suzhou , China
| | - Jianxiang Li
- Medical College, Soochow University , Suzhou , China
- Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University , Suzhou , China
| | - Tao Chen
- Medical College, Soochow University , Suzhou , China
- Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Soochow University , Suzhou , China
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Lu W, Chen Z, Ren X, Liu W, Deng R, Yuan J, Huang X, Zhu W, Liu J. SET promotes H2Ak9 acetylation by suppressing HDAC1 in trichloroethylene-induced hepatic cytotoxicity. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 59:125-131. [PMID: 29579541 DOI: 10.1016/j.etap.2018.03.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/13/2018] [Accepted: 03/14/2018] [Indexed: 06/08/2023]
Abstract
Trichloroethylene (TCE) was widely used as an industrial solvent which could cause severe liver damage. The histone chaperone SET have been identified as an important mediator of TCE-induced hepatic cytotoxicity in our previous study; however, the underlying regulatory mechanisms remain poorly understood. In this study, we found a total of 136 histone acetylation sites involved in TCE-induced hepatic cytotoxicity with the technique of Triton-acid-urea polyacrylamide gel electrophoresis (TAU-PAGE) coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS). Importantly, 17 histone acetylation sites were revealed to be mediated by SET in TCE-induced cytotoxicity. The acetylation of histone H2AK9 (H2AK9ac) was further validated by Western-blot analysis. The data showed that TCE treatment increased the acetylation of H2AK9 in hepatic L-02 cell and decreased the one in SET-knockdown L-02 cells. Besides, levels of the histone deacetylases (HDACs, including HDAC1, HDAC2, and HDAC3) was also analyzed. Interestingly, the level of HDAC1 was aberrantly suppressed in TCE-treated L-02 cells while enhanced in SET-knockdown L-02 cells. To further explore the potential role of HDAC1 in SET-mediated hepatic cytotoxicity of TCE, we employed RNA interference (RNAi) to knockdown HDAC1 in both wide type L-02 and SET-knockdown cells. The results showed that the siRNA inhibition of HDAC1 increased the acetylation of H2AK9. Taken together, our data suggested that SET promoted the acetylation of H2AK9 via suppressing the level of HDAC1, which was involved in SET-mediated hepatic cytotoxicity of TCE.
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Affiliation(s)
- Weixue Lu
- School of Chemistry, Xiangtan University, Yuhu District, Xiangtan, 411105, Hunan, China; Institute of Toxicology, Shenzhen Center for Disease Control and Prevention, No 8 Longyuan Road, Nanshan District, Shenzhen, 518055, Guangdong, China
| | - Zhihong Chen
- Institute of Toxicology, Shenzhen Center for Disease Control and Prevention, No 8 Longyuan Road, Nanshan District, Shenzhen, 518055, Guangdong, China; School of Public Health, Southern Medical University, Tonghe District, Guangzhou, 510515, China
| | - Xiaohu Ren
- Institute of Toxicology, Shenzhen Center for Disease Control and Prevention, No 8 Longyuan Road, Nanshan District, Shenzhen, 518055, Guangdong, China
| | - Wei Liu
- Institute of Toxicology, Shenzhen Center for Disease Control and Prevention, No 8 Longyuan Road, Nanshan District, Shenzhen, 518055, Guangdong, China
| | - Rongxia Deng
- Institute of Toxicology, Shenzhen Center for Disease Control and Prevention, No 8 Longyuan Road, Nanshan District, Shenzhen, 518055, Guangdong, China
| | - Jianhui Yuan
- Institute of Toxicology, Shenzhen Center for Disease Control and Prevention, No 8 Longyuan Road, Nanshan District, Shenzhen, 518055, Guangdong, China
| | - Xinfeng Huang
- Institute of Toxicology, Shenzhen Center for Disease Control and Prevention, No 8 Longyuan Road, Nanshan District, Shenzhen, 518055, Guangdong, China
| | - Weiguo Zhu
- School of Chemistry, Xiangtan University, Yuhu District, Xiangtan, 411105, Hunan, China; School of Materials Science and Engineering, Jiangsu Collaboration Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Wujin District, Changzhou 213164, China.
| | - Jianjun Liu
- Institute of Toxicology, Shenzhen Center for Disease Control and Prevention, No 8 Longyuan Road, Nanshan District, Shenzhen, 518055, Guangdong, China.
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Wang W, Liu X, Li K, Li T. Dechlorinating performance of Dehalococcoides spp. mixed culture enhanced by tourmaline. CHEMOSPHERE 2018; 194:9-19. [PMID: 29195092 DOI: 10.1016/j.chemosphere.2017.11.096] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 11/17/2017] [Accepted: 11/19/2017] [Indexed: 06/07/2023]
Abstract
Dehalococcoides spp. were extensively studied and applied to in-situ trichloroethylene (TCE) remediation since it is the only genus that can reduce TCE to harmless ethene completely. However, this technology was hindered because of the requirement of electron donor (i.e. hydrogen or fermentable organic substrate). Considering the spontaneous electric field and in-situ hydrogen production capacity of tourmaline, this mineral was used as an environmental-friendly bio-promoter for dechlorinating mixed culture containing Dehalococcoides spp. in this work. Research results showed that biodegradation of TCE and the intermediates were both significantly improved by tourmaline. The first-order TCE degradation rate coefficient increased from 0.0125 h-1 for the tourmaline-free system to 0.0306 h-1 for the system combined with 5 g L-1 tourmaline, and ethene production increased by 36%. The outstanding TCE-degrading ability in the tourmaline-bacteria system without the addition of fermentative electron donor (i.e. methanol) indicated that tourmaline could also produce electron donor to support dechlorinating bacteria. Tourmaline could have direct electric biostimulatory effect and indirect enhanced effect associated with water-derived H2 production in the electric field of tourmaline. Meanwhile, PCR-DGGE analysis exhibited that tourmaline could accelerate the succession of a bacterial, dechlorinating community. The distinctive effects of tourmaline on bacteria were related to its stable electric properties. Therefore, tourmaline could be continuously used in the bioremediation. The present study provided a safe, convenient and persistent alternative to the commonly used enhancement approaches for anaerobic reductive dechlorination process.
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Affiliation(s)
- Wei Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| | - Xingyu Liu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Kerui Li
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Tielong Li
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
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