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Pansa CC, Molica LR, de Oliveira Júnior FC, Santello LC, Moraes KCM. Cellular and molecular effects of fipronil in lipid metabolism of HepG2 and its possible connection to non-alcoholic fatty liver disease. J Biochem Mol Toxicol 2024; 38:e23595. [PMID: 38050659 DOI: 10.1002/jbt.23595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 11/05/2023] [Accepted: 11/20/2023] [Indexed: 12/06/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a global public health problem that affects more than a quarter of the population. The development of this disease is correlated with metabolic dysfunctions that lead to lipid accumulation in the liver. Pesticides are one of etiologies that support NAFLD establishment. Therefore, the effects of the insecticide fipronil on the lipid metabolism of the human hepatic cell line, HepG2, was investigated, considering its widespread use in field crops and even to control domestic pests. To address the goals of the study, biochemical, cellular, and molecular analyses of different concentrations of fipronil in cell cultures were investigated, after 24 h of incubation. Relevant metabolites such as triglycerides, glucose levels, β-oxidation processes, and gene expression of relevant elements correlated with lipid and metabolism of xenobiotics were investigated. The results suggested that at 20 μM, the pesticide increased the accumulation of triglycerides and neutral lipids by reducing fatty acid oxidation and increasing de novo lipogenesis. In addition, changes were observed in genes that control oxidative stress and the xenobiotic metabolism. Together, the results suggest that the metabolic changes caused by the insecticide fipronil may be deleterious if persistent, favoring the establishment of hepatic steatosis.
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Affiliation(s)
- Camila C Pansa
- Laboratório Sinalização Celular e Expressão Gênica, DBGA, Instituto de Biociências, Universidade Estadual Paulista, UNESP, Rio Claro, SP, Brazil
| | - Letícia R Molica
- Laboratório Sinalização Celular e Expressão Gênica, DBGA, Instituto de Biociências, Universidade Estadual Paulista, UNESP, Rio Claro, SP, Brazil
| | - Fabiano C de Oliveira Júnior
- Laboratório Sinalização Celular e Expressão Gênica, DBGA, Instituto de Biociências, Universidade Estadual Paulista, UNESP, Rio Claro, SP, Brazil
| | - Lara C Santello
- Laboratório de Microbiologia Ambiental, DBGA, Instituto de Biociências, Universidade Estadual Paulista, UNESP, Rio Claro, SP, Brazil
| | - Karen C M Moraes
- Laboratório Sinalização Celular e Expressão Gênica, DBGA, Instituto de Biociências, Universidade Estadual Paulista, UNESP, Rio Claro, SP, Brazil
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2
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Zhang M, Hu Y, Yang F, Zhang J, Zhang J, Yu W, Wang M, Lv X, Li J, Bai T, Chang F. Interaction between AhR and HIF-1 signaling pathways mediated by ARNT/HIF-1β. BMC Pharmacol Toxicol 2022; 23:26. [PMID: 35473600 PMCID: PMC9044668 DOI: 10.1186/s40360-022-00564-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 03/29/2022] [Indexed: 04/12/2024] Open
Abstract
Background The main causes of lung cancer are smoking, environmental pollution and genetic susceptibility. It is an indisputable fact that PAHs are related to lung cancer, and benzo(a) pyrene is a representative of PAHs. The purpose of the current investigation was to investigate the interaction between AhR and HIF-1 signaling pathways in A549 cells, which provide some experimental basis for scientists to find drugs that block AhR and HIF-1 signaling pathway to prevent and treat cancer. Methods This project adopts the CYP1A1 signaling pathways and the expression of CYP1B1 is expressed as a measure of AhR strength index. The expression of VEGF and CAIX volume as a measure of the strength of the signal path HIF-1 indicators. Through the construction of plasmid vector, fluorescence resonance energy transfer, real-time quantitative PCR, western blotting and immunoprecipitation, the interaction between AhR signaling pathway and HIF-1 signaling pathway was observed. Results BaP can enhance the binding ability of HIF-1α protein to HIF-1β/ARNT in a dose-dependent manner without CoCl2. However, the binding ability of AhR protein to HIF-1β/ARNT is inhibited by HIF-1α signaling pathway in a dose-dependent manner with CoCl2. Conclusion It is shown that activation of the AhR signaling pathway does not inhibit the HIF-1α signaling pathway, but activation of the HIF-1α signaling pathway inhibits the AhR signaling pathway. Supplementary Information The online version contains supplementary material available at 10.1186/s40360-022-00564-8.
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Affiliation(s)
- Mengdi Zhang
- Department of Pharmacy Experimental Teaching Center of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, China.,Inner Mongolia Research Center for Drug Screening, Hohhot, China
| | - Yuxia Hu
- Inner Mongolia Research Center for Drug Screening, Hohhot, China.,The Center for New Drug Safety Evaluation and Research of Inner Mongolia Medical University, Hohhot, China
| | - Fan Yang
- School of Pharmaceutical Science, Shanxi Medical University, Hohhot, China
| | - Jingwen Zhang
- Department of Pharmacology of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, China
| | - Jianxin Zhang
- Department of Pharmacology of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, China
| | - Wanjia Yu
- Department of Pharmacology of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, China
| | - Minjie Wang
- Department of Pharmacology of Basic medical College, Inner Mongolia Medical university, Hohhot, China
| | - Xiaoli Lv
- Inner Mongolia Research Center for Drug Screening, Hohhot, China.,Department of Pharmacology of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, China
| | - Jun Li
- Inner Mongolia Research Center for Drug Screening, Hohhot, China.,The Center for New Drug Safety Evaluation and Research of Inner Mongolia Medical University, Hohhot, China
| | - Tuya Bai
- Inner Mongolia Research Center for Drug Screening, Hohhot, China. .,Department of Pharmacology of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, China.
| | - Fuhou Chang
- Inner Mongolia Research Center for Drug Screening, Hohhot, China. .,The Center for New Drug Safety Evaluation and Research of Inner Mongolia Medical University, Hohhot, China. .,Department of Pharmacology of Pharmaceutical College, Inner Mongolia Medical University, Hohhot, China.
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3
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Heintze T, Wilhelm D, Schmidlin T, Hofmann U, Zanger UM, Schwab M, Klein K. Effects of Diminished NADPH:cytochrome P450 Reductase in Human Hepatocytes on Lipid and Bile Acid Homeostasis. Front Pharmacol 2021; 12:769703. [PMID: 34867397 PMCID: PMC8634102 DOI: 10.3389/fphar.2021.769703] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 10/11/2021] [Indexed: 12/16/2022] Open
Abstract
NADPH:cytochrome P450 oxidoreductase (POR) is the obligate electron donor for microsomal cytochrome P450 (CYP) enzymes involved in the biosynthesis of endogenous substances like bile acids and other steroids as well as in the oxidative metabolism of xenobiotics. P450 oxidoreductase also supports other redox enzymes in fatty acid and cholesterol pathways. Recently, we have established CRISPR/Cas9-mediated POR knockdown in a human hepatic cell model, HepaRG, and demonstrated the differential effects of limited POR expression on CYP activity. The aim of the present work was to systematically investigate the impact of POR knockdown with a focus on the expression of ADME (absorption, distribution, metabolism, and excretion) genes and related regulators. Functional consequences have been assessed using quantitative mass spectrometry for targeted metabolomics covering bile acids, and cholesterol and its precursors, and for untargeted proteomics. In addition to the previously described alteration of RNA expression of CYP genes, we showed significant downregulation of transcriptional regulators of drug metabolism and transport, including NR1I3 (CAR), NR1I2 (PXR), NR1H4 (FXR), and NR1H3 (LXRα) in cells with POR gene disruption. Furthermore, POR knockdown resulted in deregulated bile acid and cholesterol biosynthesis demonstrated by low levels of cholic acid derivates and increased concentrations of chenodeoxycholic acid derivates, respectively. Systemic effects of POR knockdown on global protein expression were indicated by downregulation of several metabolic pathways including lipid metabolism and biological oxidation reactions. The deduced protein network map corroborates CYP enzymes as direct interaction partners, whereas changes in lipid metabolism and homeostasis are the result of indirect effects. In summary, our results emphasize a widespread role of POR in various metabolic pathways and provide the first human data on the effects of diminished POR expression on drug and endogenous metabolism in a genomeedited HepaRG cell model.
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Affiliation(s)
- Tamara Heintze
- Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany.,Eberhard Karls University, Tübingen, Germany
| | - Denise Wilhelm
- Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany
| | - Thierry Schmidlin
- Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany.,Eberhard Karls University, Tübingen, Germany.,Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Ute Hofmann
- Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany.,Eberhard Karls University, Tübingen, Germany
| | - Ulrich M Zanger
- Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany.,Eberhard Karls University, Tübingen, Germany
| | - Matthias Schwab
- Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany.,Departments of Clinical Pharmacology and Biochemistry and Pharmacy, University of Tuebingen, Tübingen, Germany.,Cluster of Excellence IFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies", University of Tübingen, Tübingen, Germany
| | - Kathrin Klein
- Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany.,Eberhard Karls University, Tübingen, Germany
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4
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Non-cytochrome P450 enzymes involved in the oxidative metabolism of xenobiotics: Focus on the regulation of gene expression and enzyme activity. Pharmacol Ther 2021; 233:108020. [PMID: 34637840 DOI: 10.1016/j.pharmthera.2021.108020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 09/25/2021] [Accepted: 10/04/2021] [Indexed: 12/16/2022]
Abstract
Oxidative metabolism is one of the major biotransformation reactions that regulates the exposure of xenobiotics and their metabolites in the circulatory system and local tissues and organs, and influences their efficacy and toxicity. Although cytochrome (CY)P450s play critical roles in the oxidative reaction, extensive CYP450-independent oxidative metabolism also occurs in some xenobiotics, such as aldehyde oxidase, xanthine oxidoreductase, flavin-containing monooxygenase, monoamine oxidase, alcohol dehydrogenase, or aldehyde dehydrogenase-dependent oxidative metabolism. Drugs form a large portion of xenobiotics and are the primary target of this review. The common reaction mechanisms and roles of non-CYP450 enzymes in metabolism, factors affecting the expression and activity of non-CYP450 enzymes in terms of inhibition, induction, regulation, and species differences in pharmaceutical research and development have been summarized. These non-CYP450 enzymes are detoxifying enzymes, although sometimes they mediate severe toxicity. Synthetic or natural chemicals serve as inhibitors for these non-CYP450 enzymes. However, pharmacokinetic-based drug interactions through these inhibitors have rarely been reported in vivo. Although multiple mechanisms participate in the basal expression and regulation of non-CYP450 enzymes, only a limited number of inducers upregulate their expression. Therefore, these enzymes are considered non-inducible or less inducible. Overall, this review focuses on the potential xenobiotic factors that contribute to variations in gene expression levels and the activities of non-CYP450 enzymes.
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5
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Cholico GN, Fling RR, Zacharewski NA, Fader KA, Nault R, Zacharewski TR. Thioesterase induction by 2,3,7,8-tetrachlorodibenzo-p-dioxin results in a futile cycle that inhibits hepatic β-oxidation. Sci Rep 2021; 11:15689. [PMID: 34344994 PMCID: PMC8333094 DOI: 10.1038/s41598-021-95214-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 07/15/2021] [Indexed: 02/07/2023] Open
Abstract
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD), a persistent environmental contaminant, induces steatosis by increasing hepatic uptake of dietary and mobilized peripheral fats, inhibiting lipoprotein export, and repressing β-oxidation. In this study, the mechanism of β-oxidation inhibition was investigated by testing the hypothesis that TCDD dose-dependently repressed straight-chain fatty acid oxidation gene expression in mice following oral gavage every 4 days for 28 days. Untargeted metabolomic analysis revealed a dose-dependent decrease in hepatic acyl-CoA levels, while octenoyl-CoA and dicarboxylic acid levels increased. TCDD also dose-dependently repressed the hepatic gene expression associated with triacylglycerol and cholesterol ester hydrolysis, fatty acid binding proteins, fatty acid activation, and 3-ketoacyl-CoA thiolysis while inducing acyl-CoA hydrolysis. Moreover, octenoyl-CoA blocked the hydration of crotonyl-CoA suggesting short chain enoyl-CoA hydratase (ECHS1) activity was inhibited. Collectively, the integration of metabolomics and RNA-seq data suggested TCDD induced a futile cycle of fatty acid activation and acyl-CoA hydrolysis resulting in incomplete β-oxidation, and the accumulation octenoyl-CoA levels that inhibited the activity of short chain enoyl-CoA hydratase (ECHS1).
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Affiliation(s)
- Giovan N Cholico
- Department of Biochemistry and Molecular Biology, Michigan State University, Biochemistry Building, 603 Wilson Road, East Lansing, MI, 48824, USA
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, USA
| | - Russell R Fling
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, USA
- Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, 48824, USA
| | - Nicholas A Zacharewski
- Department of Biochemistry and Molecular Biology, Michigan State University, Biochemistry Building, 603 Wilson Road, East Lansing, MI, 48824, USA
| | - Kelly A Fader
- Department of Biochemistry and Molecular Biology, Michigan State University, Biochemistry Building, 603 Wilson Road, East Lansing, MI, 48824, USA
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, USA
| | - Rance Nault
- Department of Biochemistry and Molecular Biology, Michigan State University, Biochemistry Building, 603 Wilson Road, East Lansing, MI, 48824, USA
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, USA
| | - Timothy R Zacharewski
- Department of Biochemistry and Molecular Biology, Michigan State University, Biochemistry Building, 603 Wilson Road, East Lansing, MI, 48824, USA.
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, USA.
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6
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Leblanc AF, Attignon EA, Distel E, Karakitsios SP, Sarigiannis DA, Bortoli S, Barouki R, Coumoul X, Aggerbeck M, Blanc EB. A dual mixture of persistent organic pollutants modifies carbohydrate metabolism in the human hepatic cell line HepaRG. ENVIRONMENTAL RESEARCH 2019; 178:108628. [PMID: 31520823 DOI: 10.1016/j.envres.2019.108628] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 07/12/2019] [Accepted: 08/04/2019] [Indexed: 06/10/2023]
Abstract
Individuals as well as entire ecosystems are exposed to mixtures of Persistent Organic Pollutants (POPs). Previously, we showed, by a non-targeted approach, that the expression of several genes involved in carbohydrate metabolism was almost completely inhibited in the human hepatic cell line HepaRG following exposure to a mixture of the organochlorine insecticide alpha-endosulfan and 2,3,7,8 tetrachlorodibenzo-p-dioxin. In this European HEALS project, which studies the effects of the exposome on human health, we used a Physiologically Based BioKinetic model to compare the concentrations previously used in vitro with in vivo exposures for humans. We investigated the effects of these POPs on the levels of proteins, on glycogen content, glucose production and the oxidation of glucose into CO2 and correlated them to the expression of genes involved in carbohydrate metabolism as measured by RT-qPCR. Exposure to individual POPs and the mixture decreased the expression of the proteins investigated as well as glucose output (up to 82%), glucose oxidation (up to 29%) and glycogen content (up to 48%). siRNAs that specifically inhibit the expression of several xenobiotic receptors were used to assess receptor involvement in the effects of the POPs. In the HepaRG model, we demonstrate that the effects are mediated by the aryl hydrocarbon receptor and the estrogen receptor alpha, but not the pregnane X receptor or the constitutive androstane receptor. These results provide evidence that exposure to combinations of POPs, acting through different signaling pathways, may affect, more profoundly than single pollutants alone, metabolic pathways such as carbohydrate/energy metabolism and play a potential role in pollutant associated metabolic disorders.
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Affiliation(s)
- Alix F Leblanc
- INSERM UMR-S 1124, Toxicité Environnementale, Cibles Thérapeutiques, Signalisation Cellulaire et Biomarqueurs, 45 rue des Saints Pères, 75006, Paris, France; Université de Paris, Université Paris Descartes, 45 rue des Saints Pères, 75006, Paris, France.
| | - Eléonore A Attignon
- INSERM UMR-S 1124, Toxicité Environnementale, Cibles Thérapeutiques, Signalisation Cellulaire et Biomarqueurs, 45 rue des Saints Pères, 75006, Paris, France; Université de Paris, Université Paris Descartes, 45 rue des Saints Pères, 75006, Paris, France.
| | - Emilie Distel
- INSERM UMR-S 1124, Toxicité Environnementale, Cibles Thérapeutiques, Signalisation Cellulaire et Biomarqueurs, 45 rue des Saints Pères, 75006, Paris, France; Université de Paris, Université Paris Descartes, 45 rue des Saints Pères, 75006, Paris, France.
| | - Spyros P Karakitsios
- Aristotle University of Thessaloniki, Department of Chemical Engineering, 54 124, Thessaloniki, Greece.
| | - Dimosthenis A Sarigiannis
- Aristotle University of Thessaloniki, Department of Chemical Engineering, 54 124, Thessaloniki, Greece; Environmental Health Engineering, Institute for Advanced Study, Pavia, Italy.
| | - Sylvie Bortoli
- INSERM UMR-S 1124, Toxicité Environnementale, Cibles Thérapeutiques, Signalisation Cellulaire et Biomarqueurs, 45 rue des Saints Pères, 75006, Paris, France; Université de Paris, Université Paris Descartes, 45 rue des Saints Pères, 75006, Paris, France.
| | - Robert Barouki
- INSERM UMR-S 1124, Toxicité Environnementale, Cibles Thérapeutiques, Signalisation Cellulaire et Biomarqueurs, 45 rue des Saints Pères, 75006, Paris, France; Université de Paris, Université Paris Descartes, 45 rue des Saints Pères, 75006, Paris, France; AP-HP, Hôpital Necker-Enfants Malades, Service de Biochimie Métabolique, 149, rue de Sèvres, 75743, Paris, France.
| | - Xavier Coumoul
- INSERM UMR-S 1124, Toxicité Environnementale, Cibles Thérapeutiques, Signalisation Cellulaire et Biomarqueurs, 45 rue des Saints Pères, 75006, Paris, France; Université de Paris, Université Paris Descartes, 45 rue des Saints Pères, 75006, Paris, France.
| | - Martine Aggerbeck
- INSERM UMR-S 1124, Toxicité Environnementale, Cibles Thérapeutiques, Signalisation Cellulaire et Biomarqueurs, 45 rue des Saints Pères, 75006, Paris, France; Université de Paris, Université Paris Descartes, 45 rue des Saints Pères, 75006, Paris, France.
| | - Etienne B Blanc
- INSERM UMR-S 1124, Toxicité Environnementale, Cibles Thérapeutiques, Signalisation Cellulaire et Biomarqueurs, 45 rue des Saints Pères, 75006, Paris, France; Université de Paris, Université Paris Descartes, 45 rue des Saints Pères, 75006, Paris, France.
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7
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Tascher G, Burban A, Camus S, Plumel M, Chanon S, Le Guevel R, Shevchenko V, Van Dorsselaer A, Lefai E, Guguen-Guillouzo C, Bertile F. In-Depth Proteome Analysis Highlights HepaRG Cells as a Versatile Cell System Surrogate for Primary Human Hepatocytes. Cells 2019; 8:E192. [PMID: 30795634 PMCID: PMC6406872 DOI: 10.3390/cells8020192] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/16/2019] [Accepted: 02/18/2019] [Indexed: 12/12/2022] Open
Abstract
Of the hepatic cell lines developed for in vitro studies of hepatic functions as alternatives to primary human hepatocytes, many have lost major liver-like functions, but not HepaRG cells. The increasing use of the latter worldwide raises the need for establishing the reference functional status of early biobanked HepaRG cells. Using deep proteome and secretome analyses, the levels of master regulators of the hepatic phenotype and of the structural elements ensuring biliary polarity were found to be close to those in primary hepatocytes. HepaRG cells proved to be highly differentiated, with functional mitochondria, hepatokine secretion abilities, and an adequate response to insulin. Among differences between primary human hepatocytes and HepaRG cells, the factors that possibly support HepaRG transdifferentiation properties are discussed. The HepaRG cell system thus appears as a robust surrogate for primary hepatocytes, which is versatile enough to study not only xenobiotic detoxification, but also the control of hepatic energy metabolism, secretory function and disease-related mechanisms.
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Affiliation(s)
- Georg Tascher
- Laboratoire de Spectrométrie de Masse BioOrganique, CNRS, IPHC UMR 7178, Université de Strasbourg, F-67087 Strasbourg, France.
- Institute of Biochemistry II, Goethe University Hospital, D-60590 Frankfurt am Main, Germany.
| | - Audrey Burban
- INSERM U1241 NuMeCan, Université de Rennes 1, F-35033 Rennes, France.
| | - Sandrine Camus
- Biopredic International, Parc d'Affaires de la Bretêche, F-35760 St Grégoire, France.
| | - Marine Plumel
- Laboratoire de Spectrométrie de Masse BioOrganique, CNRS, IPHC UMR 7178, Université de Strasbourg, F-67087 Strasbourg, France.
| | - Stéphanie Chanon
- CarMeN Laboratory, INSERM, INRA, University of Lyon, F-69310 Pierre-Bénite, France.
| | - Remy Le Guevel
- ImPACcell platform, Biosit, Université de Rennes 1, F-35043 Rennes, France.
| | - Valery Shevchenko
- Biopredic International, Parc d'Affaires de la Bretêche, F-35760 St Grégoire, France.
| | - Alain Van Dorsselaer
- Laboratoire de Spectrométrie de Masse BioOrganique, CNRS, IPHC UMR 7178, Université de Strasbourg, F-67087 Strasbourg, France.
| | - Etienne Lefai
- CarMeN Laboratory, INSERM, INRA, University of Lyon, F-69310 Pierre-Bénite, France.
| | - Christiane Guguen-Guillouzo
- INSERM U1241 NuMeCan, Université de Rennes 1, F-35033 Rennes, France.
- Biopredic International, Parc d'Affaires de la Bretêche, F-35760 St Grégoire, France.
| | - Fabrice Bertile
- Laboratoire de Spectrométrie de Masse BioOrganique, CNRS, IPHC UMR 7178, Université de Strasbourg, F-67087 Strasbourg, France.
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8
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Tête A, Gallais I, Imran M, Chevanne M, Liamin M, Sparfel L, Bucher S, Burel A, Podechard N, Appenzeller BMR, Fromenty B, Grova N, Sergent O, Lagadic-Gossmann D. Mechanisms involved in the death of steatotic WIF-B9 hepatocytes co-exposed to benzo[a]pyrene and ethanol: a possible key role for xenobiotic metabolism and nitric oxide. Free Radic Biol Med 2018; 129:323-337. [PMID: 30268890 DOI: 10.1016/j.freeradbiomed.2018.09.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 09/20/2018] [Accepted: 09/26/2018] [Indexed: 12/15/2022]
Abstract
We previously demonstrated that co-exposing pre-steatotic hepatocytes to benzo[a]pyrene (B[a]P), a carcinogenic environmental pollutant, and ethanol, favored cell death. Here, the intracellular mechanisms underlying this toxicity were studied. Steatotic WIF-B9 hepatocytes, obtained by a 48h-supplementation with fatty acids, were then exposed to B[a]P/ethanol (10 nM/5 mM, respectively) for 5 days. Nitric oxide (NO) was demonstrated to be a pivotal player in the cell death caused by the co-exposure in steatotic hepatocytes. Indeed, by scavenging NO, CPTIO treatment of co-exposed steatotic cells prevented not only the increase in DNA damage and cell death, but also the decrease in the activity of CYP1, major cytochrome P450s of B[a]P metabolism. This would then lead to an elevation of B[a]P levels, thus possibly suggesting a long-lasting stimulation of the transcription factor AhR. Besides, as NO can react with superoxide anion to produce peroxynitrite, a highly oxidative compound, the use of FeTPPS to inhibit its formation indicated its participation in DNA damage and cell death, further highlighting the important role of NO. Finally, a possible key role for AhR was pointed out by using its antagonist, CH-223191. Indeed it prevented the elevation of ADH activity, known to participate to the ethanol production of ROS, notably superoxide anion. The transcription factor, NFκB, known to be activated by ROS, was shown to be involved in the increase in iNOS expression. Altogether, these data strongly suggested cooperative mechanistic interactions between B[a]P via AhR and ethanol via ROS production, to favor cell death in the context of prior steatosis.
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Affiliation(s)
- Arnaud Tête
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Isabelle Gallais
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Muhammad Imran
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Martine Chevanne
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Marie Liamin
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Lydie Sparfel
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Simon Bucher
- Univ Rennes, Inserm, Inra, Institut NUMECAN (Nutrition Metabolisms and Cancer) - UMR_S 1241, UMR_A 1341, F-35000 Rennes, France
| | - Agnès Burel
- Univ Rennes, Biosit - UMS 3480, US_S 018, F-35000 Rennes, France
| | - Normand Podechard
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Brice M R Appenzeller
- HBRU, Luxembourg Institute of Health, 29, rue Henri Koch, L-4354 Esch-sur-Alzette, Luxembourg
| | - Bernard Fromenty
- Univ Rennes, Inserm, Inra, Institut NUMECAN (Nutrition Metabolisms and Cancer) - UMR_S 1241, UMR_A 1341, F-35000 Rennes, France
| | - Nathalie Grova
- HBRU, Luxembourg Institute of Health, 29, rue Henri Koch, L-4354 Esch-sur-Alzette, Luxembourg
| | - Odile Sergent
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Dominique Lagadic-Gossmann
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France.
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Kwon YJ, Ye DJ, Baek HS, Chun YJ. 7,12-Dimethylbenz[α]anthracene increases cell proliferation and invasion through induction of Wnt/β-catenin signaling and EMT process. ENVIRONMENTAL TOXICOLOGY 2018; 33:729-742. [PMID: 29663660 DOI: 10.1002/tox.22560] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 03/14/2018] [Accepted: 03/25/2018] [Indexed: 06/08/2023]
Abstract
7,12-Dimethylbenz[α]anthracene (DMBA) is a hazardous component present in polluted environments. DMBA has been used as an experimental tool for in vivo tumor formation owing to its carcinogenic effects, but the detailed molecular mechanism of DMBA has not been fully established. To comprehend the carcinogenic mechanism of DMBA, we explored its effects in the breast cancer cell lines, MCF-7 and MDA-MB-231, and the cervical cancer cell line, HeLa. Cell viability assay and measurement of a proliferation marker showed that DMBA markedly increased cancer cell proliferation. Furthermore, morphological observations and wound healing assays in nontumorigenic MCF-10A cells and trans-well invasion assays in cancer cells following DMBA treatment revealed that DMBA induced cell migration and invasion. To reveal the molecular mechanism of DMBA, we investigated the effects of DMBA on the epithelial-mesenchymal transition (EMT) process and Wnt/β-catenin signaling, a critical pathway for cell proliferation that was reported to correlate with the EMT process, by using quantitative RT-PCR (qPCR), western blot analysis, and confocal microscopy. Consequently, we found that DMBA increased cancer cell proliferation and invasion through the promotion of EMT-inducing factors and β-catenin. Especially, it was revealed in promoter activity assay using mutated luciferase vectors on transcription factor-binding sites that TWIST1 is promoted by DMBA through induction of STAT3-mediated promoter activation. To further elucidate the detailed mechanism of DMBA, we aimed to identify the key regulator of its carcinogenic action. DMBA was shown to significantly upregulate the expression of specificity protein 1 (Sp1), a transcription factor, and the carcinogenic effects of DMBA were blocked via the suppression or interruption of Sp1 activity. In conclusion, our data suggested that DMBA induced carcinogenic effects through activation of Wnt/β-catenin signaling and the EMT process by upregulating Sp1 activity.
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Affiliation(s)
- Yeo-Jung Kwon
- College of Pharmacy, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - Dong-Jin Ye
- College of Pharmacy, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - Hyoung-Seok Baek
- College of Pharmacy, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - Young-Jin Chun
- College of Pharmacy, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
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Attignon EA, Distel E, Le-Grand B, Leblanc AF, Barouki R, de Oliveira E, Aggerbeck M, Blanc EB. Down-regulation of the expression of alcohol dehydrogenase 4 and CYP2E1 by the combination of α-endosulfan and dioxin in HepaRG human cells. Toxicol In Vitro 2017; 45:309-317. [DOI: 10.1016/j.tiv.2017.06.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 06/12/2017] [Accepted: 06/29/2017] [Indexed: 01/27/2023]
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12
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Cao C, Fan R, Zhao J, Zhao X, Yang J, Zhang Z, Xu S. Impact of exudative diathesis induced by selenium deficiency on LncRNAs and their roles in the oxidative reduction process in broiler chick veins. Oncotarget 2017; 8:20695-20705. [PMID: 28157700 PMCID: PMC5400537 DOI: 10.18632/oncotarget.14971] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 01/24/2017] [Indexed: 02/07/2023] Open
Abstract
Selenium deficiency may induce exudative diathesis (ED) in broiler chick, and this damage is closely related to oxidative damage. Long noncoding RNA (LncRNA) can regulate the redox state in vivo. The aim of the present study was to clarify the LncRNA expression profile in broiler veins and filter and verify the LncRNAs related to oxidative damage of ED. This study established an ED model induced by selenium deficiency and presented the expression and characterization of LncRNAs in normal and ED samples. A total of 15412 LncRNAs (including 8052 novel LncRNAs) were generated in six cDNA libraries using the Illumina Hi-Seq 4000 platform. 635 distinct changes in LncRNAs (up-regulated fold change > 1.5, down-regulated fold change < 0.67 and differentially expressed LncRNAs) were filtered. Gene ontology enrichment on LncRNAs target genes showed that the oxidative reduction process was important. This study also defined and verified 19 target mRNAs of 23 LncRNAs related to the oxidative reduction process. The in vivo and vitro experiments also demonstrated these 23 LncRNAs can participate in the oxidative reduction process. This study presents LncRNAs expression profile in broiler chick veins for the first time and confirmed 23 LncRNAs involving in the vein oxidative damage in ED.
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Affiliation(s)
- Changyu Cao
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Ruifeng Fan
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Jinxin Zhao
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Xia Zhao
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Jie Yang
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Ziwei Zhang
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Shiwen Xu
- Department of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China.,Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province, Northeast Agricultural University, Harbin 150030, P. R. China
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Utgikar R, Riddick DS. Downregulation of cytochrome P450 2C8 by 3-methylcholanthrene in human hepatocellular carcinoma cell lines. Can J Physiol Pharmacol 2017; 95:768-771. [PMID: 28384415 DOI: 10.1139/cjpp-2017-0014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The marked induction of cytochromes P450 such as CYP1A1 caused by polycyclic aromatic hydrocarbons (PAHs) like 3-methylcholanthrene (MC) is often accompanied by suppression of other hepatic P450s. The molecular mechanisms, functional consequences, and human relevance of P450 downregulation by PAHs are poorly understood. MC suppresses mRNA levels for CYP2C8, an important human P450, in cultured human hepatocytes. To avoid hepatocyte lot-to-lot variability, we assessed CYP2C8 regulation by MC in HepaRG cells, a terminally differentiated human hepatocellular carcinoma cell line that maintains high P450 expression. MC strongly induced CYP1A1 mRNA levels and markedly downregulated CYP2C8 mRNA levels in HepaRG cells. Although MC also suppressed CYP2C8 mRNA levels in the HepG2 human hepatocellular carcinoma cell line, basal CYP2C8 expression was extremely low. HepaRG cells appear to be an appropriate model system for studying the mechanisms and functional consequences of CYP2C8 downregulation by PAHs.
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Affiliation(s)
- Rucha Utgikar
- Department of Pharmacology and Toxicology, Medical Sciences Building, University of Toronto, Toronto, ON M5S 1A8, Canada.,Department of Pharmacology and Toxicology, Medical Sciences Building, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - David S Riddick
- Department of Pharmacology and Toxicology, Medical Sciences Building, University of Toronto, Toronto, ON M5S 1A8, Canada.,Department of Pharmacology and Toxicology, Medical Sciences Building, University of Toronto, Toronto, ON M5S 1A8, Canada
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