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Opitz CA, Holfelder P, Prentzell MT, Trump S. The complex biology of aryl hydrocarbon receptor activation in cancer and beyond. Biochem Pharmacol 2023; 216:115798. [PMID: 37696456 PMCID: PMC10570930 DOI: 10.1016/j.bcp.2023.115798] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/08/2023] [Accepted: 09/08/2023] [Indexed: 09/13/2023]
Abstract
The aryl hydrocarbon receptor (AHR) signaling pathway is a complex regulatory network that plays a critical role in various biological processes, including cellular metabolism, development, and immune responses. The complexity of AHR signaling arises from multiple factors, including the diverse ligands that activate the receptor, the expression level of AHR itself, and its interaction with the AHR nuclear translocator (ARNT). Additionally, the AHR crosstalks with the AHR repressor (AHRR) or other transcription factors and signaling pathways and it can also mediate non-genomic effects. Finally, posttranslational modifications of the AHR and its interaction partners, epigenetic regulation of AHR and its target genes, as well as AHR-mediated induction of enzymes that degrade AHR-activating ligands may contribute to the context-specificity of AHR activation. Understanding the complexity of AHR signaling is crucial for deciphering its physiological and pathological roles and developing therapeutic strategies targeting this pathway. Ongoing research continues to unravel the intricacies of AHR signaling, shedding light on the regulatory mechanisms controlling its diverse functions.
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Affiliation(s)
- Christiane A Opitz
- German Cancer Research Center (DKFZ), Heidelberg, Division of Metabolic Crosstalk in Cancer and the German Cancer Consortium (DKTK), DKFZ Core Center Heidelberg, 69120 Heidelberg, Germany; Neurology Clinic and National Center for Tumor Diseases, 69120 Heidelberg, Germany.
| | - Pauline Holfelder
- German Cancer Research Center (DKFZ), Heidelberg, Division of Metabolic Crosstalk in Cancer and the German Cancer Consortium (DKTK), DKFZ Core Center Heidelberg, 69120 Heidelberg, Germany; Faculty of Bioscience, Heidelberg University, 69120 Heidelberg, Germany
| | - Mirja Tamara Prentzell
- German Cancer Research Center (DKFZ), Heidelberg, Division of Metabolic Crosstalk in Cancer and the German Cancer Consortium (DKTK), DKFZ Core Center Heidelberg, 69120 Heidelberg, Germany; Faculty of Bioscience, Heidelberg University, 69120 Heidelberg, Germany
| | - Saskia Trump
- Molecular Epidemiology Unit, Berlin Institute of Health at Charité and the German Cancer Consortium (DKTK), Partner Site Berlin, a partnership between DKFZ and Charité -Universitätsmedizin Berlin, 10117 Berlin, Germany
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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: 32] [Impact Index Per Article: 6.4] [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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Zhang Z, Chen L, Xing X, Li D, Gao C, He Z, Li J, Zhu X, Xiao X, Wang S, Wang F, Ren Z, Xiao Y, Dharmage SC, Dong G, Zheng Y, Chen W. Specific histone modifications were associated with the PAH-induced DNA damage response in coke oven workers. Toxicol Res (Camb) 2016; 5:1193-1201. [PMID: 30090425 PMCID: PMC6062299 DOI: 10.1039/c6tx00112b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 05/20/2016] [Indexed: 12/11/2022] Open
Abstract
To investigate whether polycyclic aromatic hydrocarbon (PAH) exposure is associated with specific histone modifications and whether DNA damage triggers epigenetic alterations, we recruited 190 male workers with occupational exposure to PAHs and 100 male control workers from Benxi Steel Plant, Liaoning province, China. Urinary 1-hydroxypyrene (1-OHP), DNA damage, specific histone modification levels and the expression of selected DNA damage response (DDR) genes were measured in peripheral blood lymphocytes (PBLCs) of the subjects. The results showed that trimethylated Lys 27 of histone H3 (H3K27me3) and trimethylated Lys 36 of histone H3 (H3K36me3) were elevated in the PAH-exposed group (both P < 0.001), while trimethylated Lys H3 of histone H3 (H3K4me3) was decreased compared to the unexposed group (P < 0.001). Notably, H3K36me3 was positively associated with the level of internal exposure marker 1-OHP (β = 0.197; P < 0.001) and the degree of DNA damage (β = 0.175; P < 0.001) in all subjects, indicating that the PAH-induced DNA damage response might be mediated by H3K36me3 and/or H3K4me3 modifications. Particularly, the ChIP-qPCR assay revealed that the modifications of H3K36me3 were enriched in the gene body of DDR genes, MGMT and MLH1. The up-regulation of MGMT and MLH1 was correlated with the elevated H3K36me3 in the PAH-exposed workers (P < 0.001). Collectively, we revealed that H3K36me3 could be an indicator of PAH exposure and might be involved in the transcriptional regulation of DNA repair genes in response to DNA damage.
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Affiliation(s)
- Zhengbao Zhang
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Liping Chen
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Xiumei Xing
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Daochuan Li
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Chen Gao
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Zhini He
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Jie Li
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Xiaonian Zhu
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Xinhua Xiao
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Shan Wang
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Fangping Wang
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Zefang Ren
- Department of Epidemiology , School of Public Health , Sun Yat-sen University , Guangzhou , China
| | - Yongmei Xiao
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Shyamali C Dharmage
- Allergy and Lung Health Unit , Melbourne School of Population and Global Health , University of Melbourne , Australia
| | - Guanghui Dong
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
| | - Yuxin Zheng
- Key Laboratory of Chemical Safety and Health , National Institute for Occupational Health and Poison Control , Chinese Center for Disease Control and Prevention , Beijing , China . ; ; Tel: +011 86 10 83132593
| | - Wen Chen
- Key Laboratory of Guangzhou Environmental Pollution and Risk Assessment , Department of Toxicology , School of Public Health , Sun Yat-sen University , Guangzhou , China . ; ; Tel: +011 86 20 87330599
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Xia B, Yang LQ, Huang HY, Pang L, Yang XF, Yi YJ, Ren XH, Li J, Zhuang ZX, Liu JJ. Repression of Biotin-Related Proteins by Benzo[a]Pyrene-Induced Epigenetic Modifications in Human Bronchial Epithelial Cells. Int J Toxicol 2016; 35:336-43. [PMID: 26960346 DOI: 10.1177/1091581816637071] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Benzo[a]pyrene (B[a]P) exposure has been associated with the alteration in epigenetic marks that are involved in cancer development. Biotinidase (BTD) and holocarboxylase synthetase (HCS) are 2 major enzymes involved in maintaining the homeostasis of biotinylation, and the deregulation of this pathway has been associated with a number of cancers. However, the link between B[a]P exposure and the dysregulation of BTD/HCS in B[a]P-associated tumorigenesis is unknown. Here we showed that the expression of both BTD and HCS was significantly decreased upon B[a]P treatment in human bronchial epithelial (16HBE) cells. Benzo[a]pyrene exposure led to the global loss of DNA methylation by immunofluorescence, which coincided with the reduction in acetylation levels on histones H3 and H4 in 16HBE cells. Consistent with decreased histone acetylation, histone deacetylases (HDACs) HDAC2 and HDAC3 were significantly upregulated in a dosage-dependent manner. When DNA methylation or HDAC activity was inhibited, we found that the reduction in BTD and HCS was separately regulated through distinct epigenetic mechanisms. Together, our results suggested the potential link between B[a]P toxicity and deregulation of biotin homeostasis pathway in B[a]P-associated cancer development.
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Affiliation(s)
- Bo Xia
- Key Laboratory of Modern Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen, China College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan, China
| | - Lin-Qing Yang
- Key Laboratory of Modern Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Hai-Yan Huang
- Key Laboratory of Modern Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Li Pang
- College of Horticulture and Gardening, Hunan Agricultural University, Changsha, Hunan, China
| | - Xi-Fei Yang
- Key Laboratory of Modern Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - You-Jin Yi
- College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan, China
| | - Xiao-Hu Ren
- Key Laboratory of Modern Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Jie Li
- Key Laboratory of Modern Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Zhi-Xiong Zhuang
- Key Laboratory of Modern Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Jian-Jun Liu
- Key Laboratory of Modern Toxicology, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
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