1
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Wang Z, Zhang Y, Liao Z, Huang M, Shui X. The potential of aryl hydrocarbon receptor as receptors for metabolic changes in tumors. Front Oncol 2024; 14:1328606. [PMID: 38434684 PMCID: PMC10904539 DOI: 10.3389/fonc.2024.1328606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/29/2024] [Indexed: 03/05/2024] Open
Abstract
Cancer cells can alter their metabolism to meet energy and molecular requirements due to unfavorable environments with oxygen and nutritional deficiencies. Therefore, metabolic reprogramming is common in a tumor microenvironment (TME). Aryl hydrocarbon receptor (AhR) is a ligand-activated nuclear transcription factor, which can be activated by many exogenous and endogenous ligands. Multiple AhR ligands can be produced by both TME and tumor cells. By attaching to various ligands, AhR regulates cancer metabolic reprogramming by dysregulating various metabolic pathways, including glycolysis, lipid metabolism, and nucleotide metabolism. These regulated pathways greatly contribute to cancer cell growth, metastasis, and evading cancer therapies; however, the underlying mechanisms remain unclear. Herein, we review the relationship between TME and metabolism and describe the important role of AhR in cancer regulation. We also focus on recent findings to discuss the idea that AhR acts as a receptor for metabolic changes in tumors, which may provide new perspectives on the direction of AhR research in tumor metabolic reprogramming and future therapeutic interventions.
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Affiliation(s)
- Zhiying Wang
- Laboratory of Vascular Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Yuanqi Zhang
- Department of Breast Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Zhihong Liao
- Laboratory of Vascular Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Mingzhang Huang
- Laboratory of Vascular Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Xiaorong Shui
- Laboratory of Vascular Surgery, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
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2
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Watzky M, Huard S, Juricek L, Dairou J, Chauvet C, Coumoul X, Letessier A, Miotto B. Hexokinase 2 is a transcriptional target and a positive modulator of AHR signalling. Nucleic Acids Res 2022; 50:5545-5564. [PMID: 35609998 PMCID: PMC9178003 DOI: 10.1093/nar/gkac360] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 04/20/2022] [Accepted: 05/16/2022] [Indexed: 12/14/2022] Open
Abstract
The aryl hydrocarbon receptor (AHR) regulates the expression of numerous genes in response to activation by agonists including xenobiotics. Although it is well appreciated that environmental signals and cell intrinsic features may modulate this transcriptional response, how it is mechanistically achieved remains poorly understood. We show that hexokinase 2 (HK2) a metabolic enzyme fuelling cancer cell growth, is a transcriptional target of AHR as well as a modulator of its activity. Expression of HK2 is positively regulated by AHR upon exposure to agonists both in human cells and in mice lung tissues. Conversely, over-expression of HK2 regulates the abundance of many proteins involved in the regulation of AHR signalling and these changes are linked with altered AHR expression levels and transcriptional activity. HK2 expression also shows a negative correlation with AHR promoter methylation in tumours, and these tumours with high HK2 expression and low AHR methylation are associated with a worse overall survival in patients. In sum, our study provides novel insights into how AHR signalling is regulated which may help our understanding of the context-specific effects of this pathway and may have implications in cancer.
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Affiliation(s)
- Manon Watzky
- Université Paris Cité, Institut Cochin, INSERM, U1016, CNRS, UMR8104, F-75014 Paris, France
| | - Solène Huard
- Université Paris Cité, Institut Cochin, INSERM, U1016, CNRS, UMR8104, F-75014 Paris, France
| | - Ludmila Juricek
- METATOX, T3S, Toxicologie Environnementale, Cibles thérapeutiques, Signalisation cellulaire et Biomarqueurs, INSERM UMR-S1124, F-75006 Paris, France
| | - Julien Dairou
- Université Paris Cité, UFR des Sciences Fondamentales et Biomédicales, Paris, France.,Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Cité, F-75006 Paris, France
| | - Caroline Chauvet
- METATOX, T3S, Toxicologie Environnementale, Cibles thérapeutiques, Signalisation cellulaire et Biomarqueurs, INSERM UMR-S1124, F-75006 Paris, France.,Université Paris Cité, UFR des Sciences Fondamentales et Biomédicales, Paris, France
| | - Xavier Coumoul
- METATOX, T3S, Toxicologie Environnementale, Cibles thérapeutiques, Signalisation cellulaire et Biomarqueurs, INSERM UMR-S1124, F-75006 Paris, France.,Université Paris Cité, UFR des Sciences Fondamentales et Biomédicales, Paris, France
| | - Anne Letessier
- Université Paris Cité, Institut Cochin, INSERM, U1016, CNRS, UMR8104, F-75014 Paris, France
| | - Benoit Miotto
- Université Paris Cité, Institut Cochin, INSERM, U1016, CNRS, UMR8104, F-75014 Paris, France
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3
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Lizano-Fallas V, Carrasco Del Amor A, Cristobal S. Systematic analysis of chemical-protein interactions from zebrafish embryo by proteome-wide thermal shift assay, bridging the gap between molecular interactions and toxicity pathways. J Proteomics 2021; 249:104382. [PMID: 34555547 DOI: 10.1016/j.jprot.2021.104382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 09/15/2021] [Indexed: 02/06/2023]
Abstract
The molecular interaction between chemicals and proteins often promotes alteration of cellular function. One of the challenges of the toxicology is to predict the impact of exposure to chemicals. Assessing the impact of exposure implies to understand their mechanism of actions starting from identification of specific protein targets of the interaction. Current methods can mainly predict effects of characterized chemicals with knowledge of its targets, and mechanism of actions. Here, we show that proteome-wide thermal shift methods can identify chemical-protein interactions and the protein targets from bioactive chemicals. We analyzed the identified targets from a soluble proteome extracted from zebrafish embryo, that is a model system for toxicology. To evaluate the utility to predict mechanism of actions, we discussed the applicability in four cases: single chemicals, chemical mixtures, novel chemicals, and novel drugs. Our results showed that this methodology could identify the protein targets, discriminate between protein increasing and decreasing in solubility, and offering additional data to complement the map of intertwined mechanism of actions. We anticipate that the proteome integral solubility alteration (PISA) assay, as it is defined here for the unbiased identification of protein targets of chemicals could bridge the gap between molecular interactions and toxicity pathways. SIGNIFICANCE: One of the challenges of the environmental toxicology is to predict the impact of exposure to chemicals on environment and human health. Our phenotype should be explained by our genotype and the environmental exposure. Genomic methodologies can offer a deep analysis of human genome that alone cannot explain our risks of disease. We are starting to understand the key role of exposure to chemicals on our health and risks of disease. Here, we present a proteomic-based method for the identification of soluble proteins interacting with chemicals in zebrafish embryo and discuss the opportunities to complement the map of toxicity pathway perturbations. We anticipate that this PISA assay could bridge the gap between molecular interactions and toxicity pathways.
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Affiliation(s)
- Veronica Lizano-Fallas
- Department of Biomedical and Clinical Sciences, Cell Biology, Medical Faculty, Linköping University, Linköping 581 85, Sweden
| | - Ana Carrasco Del Amor
- Department of Biomedical and Clinical Sciences, Cell Biology, Medical Faculty, Linköping University, Linköping 581 85, Sweden
| | - Susana Cristobal
- Department of Biomedical and Clinical Sciences, Cell Biology, Medical Faculty, Linköping University, Linköping 581 85, Sweden.; Ikerbasque, Basque Foundation for Science, Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena, s/n, Leioa 48940, Spain..
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4
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Huerta-Yepez S, Tirado-Rodriguez A, Montecillo-Aguado MR, Yang J, Hammock BD, Hankinson O. Aryl Hydrocarbon Receptor-Dependent inductions of omega-3 and omega-6 polyunsaturated fatty acid metabolism act inversely on tumor progression. Sci Rep 2020; 10:7843. [PMID: 32398692 PMCID: PMC7217871 DOI: 10.1038/s41598-020-64146-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 04/13/2020] [Indexed: 12/21/2022] Open
Abstract
The Western diet contains a high ratio of omega-6 (ω6) to omega-3 (ω3) polyunsaturated fatty acids (PUFA). The prototypical aryl hydrocarbon receptor (AHR) ligand, 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD), induces CYP1 family enzymes, which can metabolize PUFA to epoxides. Mice fed ω3-rich or ω6-rich diets were treated with TCDD and injected subcutaneously with AHR-competent Hepa1-GFP hepatoma cells or AHR-deficient LLC lung cancer cells. TCDD reduced the growth rates of the resulting tumors in ω3-fed mice and inhibited their metastasis to the liver and/or lung, but had the opposite effects in mice fed ω6 PUFA. These responses were likely attributable to the corresponding PUFA epoxides generated in tumor cells and/or host, since many depended upon co-administration of a soluble epoxide hydrolase (EPHX2) inhibitor in males, and/or were associated with increases in epoxide levels in tumors and sites of metastasis. Equivalent effects occurred in females in the absence of EPHX2 inhibition, probably because this sex expressed reduced levels of EPHX2. The responses elicited by TCDD were associated with effects on tumor vascularity, tumor cell proliferation and/or apoptosis. Thus environmental AHR agonists, and potentially also endogenous, nutritional, and microbiome-derived agonists, may reduce or enhance cancer progression depending on the composition of dietary PUFA, particularly in females.
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Affiliation(s)
- Sara Huerta-Yepez
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Ana Tirado-Rodriguez
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Mayra R Montecillo-Aguado
- Research Unit of Oncology Diseases. Hospital Infantil de Mexico, Federico Gomez, Mexico City, Mexico
| | - Jun Yang
- Department of Entomology and Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA
| | - Bruce D Hammock
- Department of Entomology and Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA
| | - Oliver Hankinson
- Department of Pathology & Laboratory Medicine, University of California, Los Angeles, CA, 90095, USA.
- Molecular Toxicology Interdepartmental Program and Department of Environmental Health Sciences, University of California, Los Angeles, CA, 90095, USA.
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5
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Hayashi A, Denison MS. Development of a novel recombinant cell line for detection and characterization of Ah receptor nuclear translocation in intact cells. Toxicol In Vitro 2020; 66:104873. [PMID: 32333947 DOI: 10.1016/j.tiv.2020.104873] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 04/04/2020] [Accepted: 04/22/2020] [Indexed: 02/04/2023]
Abstract
The Ah receptor (AhR) is a ligand-dependent transcriptional factor that mediates the effects of structurally diverse chemicals. Ligand binding stimulates nuclear translocation of the AhR and leads to AhR DNA binding and increased gene expression. Studies of the molecular mechanisms by which ligands bind to and activate the AhR and AhR-dependent signal transduction require methods to easily examine each step of the AhR signaling pathway. While current assays can measure ligand and DNA binding in vitro and gene expression in cells, there is no simple method to monitor AhR nuclear translocation. We developed a stably transfected mouse hepatoma cell line (yAHAYc6) that expresses yellow fluorescent protein-tagged AhR (yAhR) for use in qualitative or semiquantitative assessment of nuclear/cytoplasmic distribution of yAhR in living cells by fluorescent microscopy. yAhR nuclear translocation was stimulated in a concentration- and time-dependent manner by AhR agonists and inhibited by antagonists. Inhibition of nuclear export channels by leptomycin B, resulted in increased nuclear accumulation of yAhR in the absence of added ligand, indicating endogenous nucleocytoplasmic shuttling of unliganded AhR and demonstrating the utility of these cells. This novel cell line can be used to detect and characterize AhR ligands and will facilitate mechanistic studies of AhR signaling.
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Affiliation(s)
- Ai Hayashi
- Department of Environmental Toxicology, University of California, Davis, CA 95616, USA
| | - Michael S Denison
- Department of Environmental Toxicology, University of California, Davis, CA 95616, USA.
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6
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Prokopec SD, Viluksela M, Miettinen HM, Boutros PC, Pohjanvirta R. Transgenerational epigenetic and transcriptomic effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin exposure in rat. Arch Toxicol 2020; 94:1613-1624. [PMID: 32277265 DOI: 10.1007/s00204-020-02730-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 03/26/2020] [Indexed: 12/30/2022]
Abstract
In rats, direct exposure to TCDD causes myriad toxicities. Exposed rats experience hepatotoxicity, wasting syndrome and immune suppression, amongst others. "Inherited exposure", as occurs in the F3 generation of directly exposed F0 animals, has also been shown to cause toxicity: both male and female F3 rats demonstrate an increased incidence of adult onset disease, females also display reproductive abnormalities and increased incidence of ovarian diseases while males show increased incidence of kidney disease and an altered sperm epigenome. Here, we explore the hepatic transcriptomic profile of male and female F3 Sprague-Dawley rats bred through the paternal germ line from F0 dams exposed to a single dose of TCDD (0, 30, 100, 300 or 1000 ng/kg body weight) by oral gavage. We hypothesize that RNA transcripts with altered abundance in livers of unexposed F3 progeny of treated F0 Sprague-Dawley rats may result from epigenetic modifications to the genome. We further survey patterns of differential methylation within male F3 rat testis. Female F3 rats demonstrated more TCDD-mediated hepatic transcriptomic changes than males, with differences primarily in the lowest dose group. In testis from male F3 rats, multiple olfactory receptors displayed patterns of differential methylation. Hypermethylation of Egfr and Mc5r among testes from TCDD lineage rats was observed, but without corresponding changes in hepatic mRNA abundance. Further studies examining these differences in other tissue types are warranted.
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Affiliation(s)
| | - Matti Viluksela
- Department of Environmental and Biological Sciences, School of Pharmacy (Toxicology), University of Eastern Finland, Kuopio, Finland.,Environmental Health Unit, Finnish Institute for Health and Welfare (THL), Kuopio, Finland
| | - Hanna M Miettinen
- Environmental Health Unit, Finnish Institute for Health and Welfare (THL), Kuopio, Finland.,A. I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Paul C Boutros
- Department of Medical Biophysics, University of Toronto, Toronto, Canada. .,Department of Pharmacology and Toxicology, Universally of Toronto, Toronto, Canada. .,Department of Human Genetics, University of California, Los Angeles, 12-109 CHS, 10833 Le Conte Avenue, Los Angeles, CA, 90095, USA. .,Department of Urology, University of California, Los Angeles, Los Angeles, USA. .,Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, USA. .,Institute for Precision Health, University of California, Los Angeles, Los Angeles, USA. .,Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, USA.
| | - Raimo Pohjanvirta
- Department of Food Hygiene and Environmental Health, Faculty of Veterinary Medicine, University of Helsinki, P.O. Box 66, 00014, Helsinki, Finland.
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7
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Johnson KJ, Passage J, Lin H, Sriram S, Budinsky RA. Dioxin male rat reproductive toxicity mode of action and relative potency of 2,3,7,8-tetrachlorodibenzo-p-dioxin and 2,3,7,8-tetrachlorodibenzofuran characterized by fetal pituitary and testis transcriptome profiling. Reprod Toxicol 2020; 93:146-162. [PMID: 32109520 DOI: 10.1016/j.reprotox.2020.02.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 02/10/2020] [Accepted: 02/20/2020] [Indexed: 12/28/2022]
Abstract
Fetal rat exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) reduces epididymal sperm number involving altered pituitary-testicular hormonal signaling as the proposed mode-of-action (MOA). To evaluate this MOA and compare TCDD to 2,3,7,8-tetrachlorodibenzofuran (TCDF), an in utero rat exposure and study was conducted. Endpoints included congener tissue levels and transcriptomes of maternal liver and fetal liver, testis, and pituitary. Decreased gonadotropin subunit mRNAs levels (Lhb and Fshb) and enriched signaling pathways including GNRH Signaling and Calcium Signaling were observed in fetal pituitary after TCDD (but not TCDF) exposure. TCDD (but not TCDF) decreased fetal testis cholesterologenic and steroidogenic pathway genes. TCDD tissue concentrations in dam liver, dam adipose, and whole fetus were approximately 3- to 6-fold higher than TCDF. These results support a MOA for dioxin-induced rat male reproductive toxicity involving key events in both the fetal pituitary (e.g., reduced gonadotropin production) and fetal testis (e.g., reduced Leydig cell cholesterologenesis and steroidogenesis).
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Affiliation(s)
- Kamin J Johnson
- Corteva Agriscience, 9330 Zionsville Road, Indianapolis, IN, 46268, USA.
| | - Julie Passage
- Corteva Agriscience, 9330 Zionsville Road, Indianapolis, IN, 46268, USA.
| | - Hui Lin
- The Dow Chemical Company, Washington Street, 1803 Building, Midland, MI, 48674, USA.
| | - Shreedharan Sriram
- Corteva Agriscience, 9330 Zionsville Road, Indianapolis, IN, 46268, USA.
| | - Robert A Budinsky
- The Dow Chemical Company, Washington Street, 1803 Building, Midland, MI, 48674, USA.
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8
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Mahringer A, Bernd A, Miller DS, Fricker G. Aryl hydrocarbon receptor ligands increase ABC transporter activity and protein expression in killifish (Fundulus heteroclitus) renal proximal tubules. Biol Chem 2020; 400:1335-1345. [PMID: 30913027 DOI: 10.1515/hsz-2018-0425] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 03/21/2019] [Indexed: 12/15/2022]
Abstract
Many widespread and persistent organic pollutants, for example, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and some polychlorinated biphenyls, activate the aryl hydrocarbon receptor (AhR) causing it to translocate to the cell nucleus where it transactivates target genes, increasing expression of a number of xenobiotic metabolizing enzymes as well as some transporters. AhR's ability to target transporters within the kidney is essentially unexplored. We show here that exposing isolated killifish (Fundulus heteroclitus) renal proximal tubules to micromolar β-naphthoflavone (BNF) or nanomolar TCDD roughly doubled the transport activity of Multidrug resistance-associated proteins Mrp2 and Mrp4, P-glycoprotein (P-gp) and Breast cancer resistance protein (Bcrp), all ATP-driven xenobiotic efflux pumps and critical determinants of renal xenobiotic excretion. These effects were abolished by actinomycin D and cycloheximide and by the AhR antagonist, α-naphthoflavone, indicating that increased transport activity was dependent on transcription and translation as well as ligand binding to AhR. Quantitative immunostaining of renal tubules exposed to BNF and TCDD showed increased luminal membrane expression of Mrp2, Mrp4, P-gp and Bcrp. Thus, in these renal tubules, the four ABC transporters are targets of AhR action.
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Affiliation(s)
- Anne Mahringer
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, D-69120 Heidelberg, Germany.,Mount Desert Island Biological Laboratory (MDIBL), Salisbury Cove, ME 04672, USA
| | - Alexandra Bernd
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, D-69120 Heidelberg, Germany.,Mount Desert Island Biological Laboratory (MDIBL), Salisbury Cove, ME 04672, USA
| | - David S Miller
- Mount Desert Island Biological Laboratory (MDIBL), Salisbury Cove, ME 04672, USA.,Laboratory of Toxicology and Pharmacology and Chemistry, National Institutes of Health/National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
| | - Gert Fricker
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, D-69120 Heidelberg, Germany.,Mount Desert Island Biological Laboratory, Salisbury Cove, ME 04672, USA
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9
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Comparative toxicoproteogenomics of mouse and rat liver identifies TCDD-resistance genes. Arch Toxicol 2019; 93:2961-2978. [DOI: 10.1007/s00204-019-02560-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 09/02/2019] [Indexed: 12/21/2022]
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10
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Villaseñor-Altamirano AB, Watson JD, Prokopec SD, Yao CQ, Boutros PC, Pohjanvirta R, Valdés-Flores J, Elizondo G. 2,3,7,8-Tetrachlorodibenzo-p-dioxin modifies alternative splicing in mouse liver. PLoS One 2019; 14:e0219747. [PMID: 31386671 PMCID: PMC6684058 DOI: 10.1371/journal.pone.0219747] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 07/02/2019] [Indexed: 12/22/2022] Open
Abstract
Alternative splicing is a co-transcriptional mechanism that generates protein diversity by including or excluding exons in different combinations, thereby expanding the diversity of protein isoforms of a single gene. Abnormalities in this process can result in deleterious effects to human health, and several xenobiotics are known to interfere with splicing regulation through multiple mechanisms. These changes could lead to human diseases such as cancer, neurological disorders, autoimmune diseases, and developmental disorders. 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is an environmental contaminant generated as a byproduct of various industrial activities. Exposure to this dioxin has been linked to a wide range of pathologies through the alteration of multiple cellular processes. However, the effects of TCDD exposure on alternative splicing have not yet been studied. Here, we investigated whether a single po. dose of 5 μg/kg or 500 μg/kg TCDD influence hepatic alternative splicing in adult male C57BL/6Kou mouse. We identified several genes whose alternative splicing of precursor messenger RNAs was modified following TCDD exposure. In particular, we demonstrated that alternative splicing of Cyp1a1, Ahrr, and Actn1 was significantly altered after TCDD treatment. These findings show that the exposure to TCDD has an impact on alternative-splicing, and suggest a new avenue for understanding TCDD-mediated toxicity and pathogenesis.
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Affiliation(s)
- Ana B. Villaseñor-Altamirano
- Cell Biology Department, Center for Research and Advanced Studies of the National Polytechnic Institute, CINVESTAN-IPN, Mexico City, Mexico
- International Laboratory for Human Genome Research, National Autonomous University of Mexico, Queretaro, Mexico
| | | | | | - Cindy Q. Yao
- Ontario Institute for Cancer Research, Toronto, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Paul C. Boutros
- Ontario Institute for Cancer Research, Toronto, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
- Department of Human Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Raimo Pohjanvirta
- Laboratory of Toxicology, National Institute for Health and Welfare, Kuopio, Finland
- Department of Food Hygiene and Environmental Health, University of Helsinki, Helsinki, Finland
| | - Jesús Valdés-Flores
- Biochemistry Department, Center for Research and Advanced Studies of the National Polytechnic Institute, CINVESTAV-IPN, Mexico City, Mexico
| | - Guillermo Elizondo
- Cell Biology Department, Center for Research and Advanced Studies of the National Polytechnic Institute, CINVESTAN-IPN, Mexico City, Mexico
- * E-mail:
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11
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Prokopec SD, Pohjanvirta R, Mahiout S, Pettersson L, Boutros PC. Transcriptomic Impact of IMA-08401, a Novel AHR Agonist Resembling Laquinimod, on Rat Liver. Int J Mol Sci 2019; 20:ijms20061370. [PMID: 30893768 PMCID: PMC6471016 DOI: 10.3390/ijms20061370] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 03/13/2019] [Accepted: 03/15/2019] [Indexed: 02/06/2023] Open
Abstract
IMA-08401 (C2) is a novel aryl hydrocarbon receptor (AHR) agonist and selective AHR modulator (SAHRM) that is structurally similar to laquinimod (LAQ). Both compounds are converted to the AHR-active metabolite DELAQ (IMA-06201) in vivo. SAHRMs have been proposed as therapeutic options for various autoimmune disorders. Clinical trials on LAQ have not reported any significant toxic outcomes and C2 has shown low toxicity in rats; however, their functional resemblance to the highly toxic AHR agonist 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) raises questions. Here, we characterize the hepatic transcriptomic changes induced by acute (single-dose) and subacute exposure (repeated dosing for 5 days followed by a 5-day recovery period) to C2 in Sprague-Dawley rats. Exposure to C2 leads to activation of the AHR, as shown by altered transcription of Cyp1a1. We identify a heightened response early after exposure that drops off by day 10. Acute exposure to C2 leads to changes to transcription of genes involved in antiviral and antibacterial responses, which highlights the immunomodulator effects of this AHR agonist. Subacute exposure causes an oxidative stress response in the liver, the consequences of which require further study on target tissues such as the CNS and immune system, both of which may be compromised in this patient population.
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Affiliation(s)
| | - Raimo Pohjanvirta
- Laboratory of Toxicology, National Institute for Health and Welfare, FI-70210 Kuopio, Finland.
- Department of Food Hygiene and Environmental Health, University of Helsinki, FI-00790 Helsinki, Finland.
| | - Selma Mahiout
- Department of Food Hygiene and Environmental Health, University of Helsinki, FI-00790 Helsinki, Finland.
| | | | - Paul C Boutros
- Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada.
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada.
- Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada.
- Department of Human Genetics, University of California, Los Angeles, CA 90095, USA.
- Department of Urology, University of California, Los Angeles, CA 90095, USA.
- Institute for Precision Health, University of California, Los Angeles, CA 90095, USA.
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, CA 90095, USA.
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12
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Zhao J, Zou H, Han C, Ma J, Zhao J, Tang J. Circlular RNA BARD1 (Hsa_circ_0001098) overexpression in breast cancer cells with TCDD treatment could promote cell apoptosis via miR-3942/BARD1 axis. Cell Cycle 2018; 17:2731-2744. [PMID: 30521417 DOI: 10.1080/15384101.2018.1556058] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Breast cancer threatened the health of millions of people around the world. Here we explored the influence of TCDD on the expression of circRNA_BARD1 (circ_0001098) in breast cancer and studied the potential molecular mechanism of circRNA_BARD1. The data from GSE76608 was applied to analyze differentially expressed circRNAs and mRNAs. The expressions of circRNA_BARD1, BARD1, miR-3942-3p, miR-4760-3p and apoptosis-related protein p53 were detected by qRT-PCR or western blot. Circinteractome, TargetScan, CIRCNET and dual luciferase reporter assay were employed to uncover the target relationship between circRNA_BARD1/BARD1 and miR-3942-3p/miR-4760-3p. Flow cytometric analysis was used to reveal cell cycle and cell apoptosis. Immunofluorescence was applied to determinate γ-H2AX level. Xenograft assay and in vivo 3-D imaging was implemented to further verify the conclusions in vitro. CircRNA_BARD1 (circ_0001098) was up-regulated in breast cancer with the treatment of TCDD and the up-regulation of circRNA_BARD1 could restrain cell proliferation, block cell cycle and promote cell apoptosis. Moreover, the target relationship between circRNA_BARD1/BARD1 and miR-3942-3p was confirmed. In addition, miR-3942-3p overexpression promoted the disease progression and BARD1 up-regulation inhibited the disease progression in the breast cancer. Similarly, circRNA_BARD1 overexpression induced by TCDD suppressed the growth and metastasis of tumor in vivo. In conclusion, TCDD induced circ_0001098 overexpression and then suppressed breast cancer tumorigenesis via miR-3942-3p/BARD1 axis. The finding of TCDD-circRNA-miRNA-mRNA axis might bring a new perspective for cure strategy of breast cancer.
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Affiliation(s)
- Jianzhu Zhao
- a Department of Oncology , Shengjing Hospital of China Medical University , Shenyang , China
| | - Huawei Zou
- a Department of Oncology , Shengjing Hospital of China Medical University , Shenyang , China
| | - Chengbo Han
- a Department of Oncology , Shengjing Hospital of China Medical University , Shenyang , China
| | - Jietao Ma
- a Department of Oncology , Shengjing Hospital of China Medical University , Shenyang , China
| | - Jungang Zhao
- b Department of Thoracic Surgery , Shengjing Hospital of China Medical University , Shenyang , China
| | - Jun Tang
- b Department of Thoracic Surgery , Shengjing Hospital of China Medical University , Shenyang , China
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Safe S, Han H, Goldsby J, Mohankumar K, Chapkin RS. Aryl Hydrocarbon Receptor (AhR) Ligands as Selective AhR Modulators: Genomic Studies. CURRENT OPINION IN TOXICOLOGY 2018; 11-12:10-20. [PMID: 31453421 DOI: 10.1016/j.cotox.2018.11.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The aryl hydrocarbon receptor (AhR) binds structurally diverse ligands that vary from the environmental toxicant 2,3,7,8-tetrachlorodibenzo-B-dioxin (TCDD) to AhR- active pharmaceuticals and health-promoting phytochemicals. There are remarkable differences in the toxicity of TCDD and related halogenated aromatics (HAs) vs. health promoting AhR ligands, and genomic analysis shows that even among the toxic HAs, there are differences in their regulation of genes and pathways. Thus, like ligands for other receptors, AhR ligands are selective AhR modulators (SAhRMs) which exhibit variable tissue-, organ- and species-specific genomic and functional activities.
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Affiliation(s)
- Stephen Safe
- Department of Veterinary Physiology and Pharmacology
| | - Huajun Han
- Department of Biochemistry & Biophysics
- Department of Nutrition & Food Science
- Program in Integrative Nutrition & Complex Diseases, Texas A&M University, College Station, TX, USA
| | - Jennifer Goldsby
- Department of Nutrition & Food Science
- Program in Integrative Nutrition & Complex Diseases, Texas A&M University, College Station, TX, USA
| | | | - Robert S Chapkin
- Department of Biochemistry & Biophysics
- Department of Nutrition & Food Science
- Program in Integrative Nutrition & Complex Diseases, Texas A&M University, College Station, TX, USA
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14
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Procházková J, Strapáčová S, Svržková L, Andrysík Z, Hýžďalová M, Hrubá E, Pěnčíková K, Líbalová H, Topinka J, Kléma J, Espinosa JM, Vondráček J, Machala M. Adaptive changes in global gene expression profile of lung carcinoma A549 cells acutely exposed to distinct types of AhR ligands. Toxicol Lett 2018; 292:162-174. [PMID: 29704546 DOI: 10.1016/j.toxlet.2018.04.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/28/2018] [Accepted: 04/17/2018] [Indexed: 12/19/2022]
Abstract
Exposure to persistent ligands of aryl hydrocarbon receptor (AhR) has been found to cause lung cancer in experimental animals, and lung adenocarcinomas are often associated with enhanced AhR expression and aberrant AhR activation. In order to better understand the action of toxic AhR ligands in lung epithelial cells, we performed global gene expression profiling and analyze TCDD-induced changes in A549 transcriptome, both sensitive and non-sensitive to CH223191 co-treatment. Comparison of our data with results from previously reported microarray and ChIP-seq experiments enabled us to identify candidate genes, which expression status reflects exposure of lung cancer cells to TCDD, and to predict processes, pathways (e.g. ER stress, Wnt/β-cat, IFNɣ, EGFR/Erbb1), putative TFs (e.g. STAT, AP1, E2F1, TCF4), which may be implicated in adaptive response of lung cells to TCDD-induced AhR activation. Importantly, TCDD-like expression fingerprint of selected genes was observed also in A549 cells exposed acutely to both toxic (benzo[a]pyrene, benzo[k]fluoranthene) and endogenous AhR ligands (2-(1H-Indol-3-ylcarbonyl)-4-thiazolecarboxylic acid methyl ester and 6-formylindolo[3,2-b]carbazole). Overall, our results suggest novel cellular candidates, which could help to improve monitoring of AhR-dependent transcriptional activity during acute exposure of lung cells to distinct types of environmental pollutants.
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Affiliation(s)
- Jiřina Procházková
- Department of Chemistry and Toxicology, Veterinary Research Institute, Brno, Czech Republic
| | - Simona Strapáčová
- Department of Chemistry and Toxicology, Veterinary Research Institute, Brno, Czech Republic
| | - Lucie Svržková
- Department of Chemistry and Toxicology, Veterinary Research Institute, Brno, Czech Republic
| | - Zdeněk Andrysík
- 1 Linda Crnic Institute for Down Syndrome, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; Department of Pharmacology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Martina Hýžďalová
- Department of Chemistry and Toxicology, Veterinary Research Institute, Brno, Czech Republic
| | - Eva Hrubá
- Department of Chemistry and Toxicology, Veterinary Research Institute, Brno, Czech Republic
| | - Kateřina Pěnčíková
- Department of Chemistry and Toxicology, Veterinary Research Institute, Brno, Czech Republic
| | - Helena Líbalová
- Department of Genetic Toxicology and Nanotoxicology, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jan Topinka
- Department of Genetic Toxicology and Nanotoxicology, Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jiří Kléma
- Department of Computer Science, Czech Technical University in Prague, Czech Republic
| | - Joaquín M Espinosa
- 1 Linda Crnic Institute for Down Syndrome, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; Department of Pharmacology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Jan Vondráček
- Department of Cytokinetics, Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic
| | - Miroslav Machala
- Department of Chemistry and Toxicology, Veterinary Research Institute, Brno, Czech Republic.
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