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Pak YK, Im S, Choi HS, Lind L, Lind M, Lee HK. Correlation between environmental pollutant exposure and cardiopulmonary health by serum biomarker analysis in the Swedish elderly population. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2024:1-14. [PMID: 39037202 DOI: 10.1080/09603123.2024.2382306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 07/16/2024] [Indexed: 07/23/2024]
Abstract
Persistent organic pollutants (POPs) affect human health through the aryl hydrocarbon receptor (AhR) pathway and are implicated in mitochondrial dysfunction. Using data from the PIVUS study, we investigated the associations of serum AhR ligand (POP)-mediated luciferase activity (AhRL), mitochondrial ATP production inhibiting substances (MIS-ATP), and those affecting reactive oxygen species (MIS-ROS) with several metabolic syndrome (MetS) and cardiopulmonary function parameters. These include insulin resistance (HOMA-IR), inflammation, oxidative stress, and cardiopulmonary variables (FVC, FEV1, LV-EF, CCA distensibility). MIS-ATP showed significant correlations with HOMA-IR and pulmonary functions, indicating its direct impact of MIS-ATP on metabolic and pulmonary health. MIS-ROS correlated with oxidative stress markers and CCA distensibility, suggesting a role in systemic inflammatory responses. This study highlights the intricate relationships between environmental pollutant mixture and cardiopulmonary health in MetS as indicated by biomarkers of POP exposure in the elderly population, suggesting POP exposure may influence MetS onset and progression through mitochondrial dysfunction.
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Affiliation(s)
- Youngmi Kim Pak
- Department of Physiology, Medical Research Center for Bioreaction to Reactive Oxygen Species and Biomedical Science Institute, Kyung Hee University School of Medicine, Seoul, South Korea
- Department of Neuroscience, Medical Research Center for Bioreaction to Reactive Oxygen Species and Biomedical Science Institute, Kyung Hee University School of Medicine, Seoul, South Korea
| | - Suyeol Im
- Department of Neuroscience, Medical Research Center for Bioreaction to Reactive Oxygen Species and Biomedical Science Institute, Kyung Hee University School of Medicine, Seoul, South Korea
| | - Hoon Sung Choi
- Department of Internal Medicine, Chung Ang University College of Medicine, Seoul, South Korea
| | - Lars Lind
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Monica Lind
- Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden
| | - Hong Kyu Lee
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea
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Fitzgerald LF, Lackey J, Moussa A, Shah SV, Castellanos AM, Khan S, Schonk M, Thome T, Salyers ZR, Jakkidi N, Kim K, Yang Q, Hepple RT, Ryan TE. Chronic aryl hydrocarbon receptor activity impairs muscle mitochondrial function with tobacco smoking. J Cachexia Sarcopenia Muscle 2024; 15:646-659. [PMID: 38333944 PMCID: PMC10995249 DOI: 10.1002/jcsm.13439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 11/21/2023] [Accepted: 01/14/2024] [Indexed: 02/10/2024] Open
Abstract
BACKGROUND Accumulating evidence has demonstrated that chronic tobacco smoking directly contributes to skeletal muscle dysfunction independent of its pathological impact to the cardiorespiratory systems. The mechanisms underlying tobacco smoke toxicity in skeletal muscle are not fully resolved. In this study, the role of the aryl hydrocarbon receptor (AHR), a transcription factor known to be activated with tobacco smoke, was investigated. METHODS AHR related gene (mRNA) expression was quantified in skeletal muscle from adult controls and patients with chronic obstructive pulmonary disease (COPD), as well as mice with and without cigarette smoke exposure. Utilizing both skeletal muscle-specific AHR knockout mice exposed to chronic repeated (5 days per week for 16 weeks) cigarette smoke and skeletal muscle-specific expression of a constitutively active mutant AHR in healthy mice, a battery of assessments interrogating muscle size, contractile function, mitochondrial energetics, and RNA sequencing were employed. RESULTS Skeletal muscle from COPD patients (N = 79, age = 67.0 ± 8.4 years) had higher levels of AHR (P = 0.0451) and CYP1B1 (P < 0.0001) compared to healthy adult controls (N = 16, age = 66.5 ± 6.5 years). Mice exposed to cigarette smoke displayed higher expression of Ahr (P = 0.008), Cyp1b1 (P < 0.0001), and Cyp1a1 (P < 0.0001) in skeletal muscle compared to air controls. Cigarette smoke exposure was found to impair skeletal muscle mitochondrial oxidative phosphorylation by ~50% in littermate controls (Treatment effect, P < 0.001), which was attenuated by deletion of the AHR in muscle in male (P = 0.001), but not female, mice (P = 0.37), indicating there are sex-dependent pathological effects of smoking-induced AHR activation in skeletal muscle. Viral mediated expression of a constitutively active mutant AHR in the muscle of healthy mice recapitulated the effects of cigarette smoking by decreasing muscle mitochondrial oxidative phosphorylation by ~40% (P = 0.003). CONCLUSIONS These findings provide evidence linking chronic AHR activation secondary to cigarette smoke exposure to skeletal muscle bioenergetic deficits in male, but not female, mice. AHR activation is a likely contributor to the decline in muscle oxidative capacity observed in smokers and AHR antagonism may provide a therapeutic avenue aimed to improve muscle function in COPD.
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Affiliation(s)
| | - Jacob Lackey
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Ahmad Moussa
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Sohan V. Shah
- Department of Physical TherapyUniversity of FloridaGainesvilleFLUSA
| | - Ana Maria Castellanos
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Shawn Khan
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Martin Schonk
- Department of Physical TherapyUniversity of FloridaGainesvilleFLUSA
| | - Trace Thome
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Zachary R. Salyers
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Nishka Jakkidi
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Kyoungrae Kim
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Qingping Yang
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
| | - Russell T. Hepple
- Department of Physical TherapyUniversity of FloridaGainesvilleFLUSA
- Myology InstituteUniversity of FloridaGainesvilleFLUSA
| | - Terence E. Ryan
- Department of Applied Physiology and KinesiologyUniversity of FloridaGainesvilleFLUSA
- Myology InstituteUniversity of FloridaGainesvilleFLUSA
- Center for Exercise Science, University of FloridaGainesvilleFLUSA
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3
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Miranda RG, Guarache GC, Leão AHFF, Pereira GJ, Dorta DJ. BDE-47-mediated cytotoxicity via autophagy blockade in 3D HepaRG spheroids cultured in alginate microcapsules. Chem Biol Interact 2024; 388:110831. [PMID: 38101597 DOI: 10.1016/j.cbi.2023.110831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/28/2023] [Accepted: 12/11/2023] [Indexed: 12/17/2023]
Abstract
Polybrominated Diphenyl Ethers (PBDEs) are a major class of brominated flame retardants, and their widespread use has led them to be considered contaminants with emerging concern. PBDEs have been detected in the indoor air, house dust, food, and all environmental compartments. The congener BDE-47 (2,2',4,4'-tetrabromodiphenyl ether) is the most prevalent, and hepatotoxicity, neurotoxicity, immunological changes, endocrine disruption, and genotoxic potential have been related to its exposure. Although the BDE-47 molecular toxicity pathway is directly related to intrinsic apoptotic cell death, the role of autophagy in BDE-47 toxicity remains unclear. In this context, three-dimensional cell culture has emerged as a good strategy for the replacement of animals in toxicological testing. Here, we used HepaRG spheroids cultured in alginate microcapsules to investigate the role of autophagy in BDE-47-mediated hepatotoxicity. We developed mature and functional HepaRG spheroids by culturing them in alginate microcapsules. Histological analysis revealed that HepaRG spheroids formed an extracellular matrix and stored glycogen. No apoptotic and/or necrotic cores were observed. BDE-47 showed concentration- and time-dependent cytotoxicity in HepaRG spheroids. In the early exposure period, BDE-47 initially disrupted mitochondrial activity and increased the formation of acid compartments that promoted the increase in autophagic activity; however, this autophagy was blocked, and long-term exposure to BDE-47 promoted efficient apoptotic cell death through autophagy blockade, as evidenced by an increased number of fragmented/condensed nuclei. Therefore, for the first time, we demonstrated BDE-47 toxicity and its cell pathway induces cell death using a three-dimensional liver cell culture, the HepaRG cell line.
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Affiliation(s)
- Raul Ghiraldelli Miranda
- Univesity of São Paulo (USP), School of Phamaceutical Science of Ribeirão Preto, Ribeirão Preto, SP, 14040-903, Brazil; Department of Life Science of the University of Coimbra, 3000, Coimbra, Portugal.
| | - Gabriel Cicolin Guarache
- Department of Pharmacology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
| | - Anderson Henrique F F Leão
- Department of Pharmacology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
| | - Gustavo José Pereira
- Department of Pharmacology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
| | - Daniel Junqueira Dorta
- Universidade de São Paulo (USP), Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Departamento de Química, Ribeirão Preto, SP, 14040-903, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies (INCT-DATREM), São Paulo State University (UNESP), Institute os Chemistry, Araraquara, SP, 14800-060, Brazil.
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4
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Holme JA, Vondráček J, Machala M, Lagadic-Gossmann D, Vogel CFA, Le Ferrec E, Sparfel L, Øvrevik J. Lung cancer associated with combustion particles and fine particulate matter (PM 2.5) - The roles of polycyclic aromatic hydrocarbons (PAHs) and the aryl hydrocarbon receptor (AhR). Biochem Pharmacol 2023; 216:115801. [PMID: 37696458 PMCID: PMC10543654 DOI: 10.1016/j.bcp.2023.115801] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 09/08/2023] [Accepted: 09/08/2023] [Indexed: 09/13/2023]
Abstract
Air pollution is the leading cause of lung cancer after tobacco smoking, contributing to 20% of all lung cancer deaths. Increased risk associated with living near trafficked roads, occupational exposure to diesel exhaust, indoor coal combustion and cigarette smoking, suggest that combustion components in ambient fine particulate matter (PM2.5), such as polycyclic aromatic hydrocarbons (PAHs), may be central drivers of lung cancer. Activation of the aryl hydrocarbon receptor (AhR) induces expression of xenobiotic-metabolizing enzymes (XMEs) and increase PAH metabolism, formation of reactive metabolites, oxidative stress, DNA damage and mutagenesis. Lung cancer tissues from smokers and workers exposed to high combustion PM levels contain mutagenic signatures derived from PAHs. However, recent findings suggest that ambient air PM2.5 exposure primarily induces lung cancer development through tumor promotion of cells harboring naturally acquired oncogenic mutations, thus lacking typical PAH-induced mutations. On this background, we discuss the role of AhR and PAHs in lung cancer development caused by air pollution focusing on the tumor promoting properties including metabolism, immune system, cell proliferation and survival, tumor microenvironment, cell-to-cell communication, tumor growth and metastasis. We suggest that the dichotomy in lung cancer patterns observed between smoking and outdoor air PM2.5 represent the two ends of a dose-response continuum of combustion PM exposure, where tumor promotion in the peripheral lung appears to be the driving factor at the relatively low-dose exposures from ambient air PM2.5, whereas genotoxicity in the central airways becomes increasingly more important at the higher combustion PM levels encountered through smoking and occupational exposure.
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Affiliation(s)
- Jørn A Holme
- Department of Air Quality and Noise, Division of Climate and Environmental Health, Norwegian Institute of Public Health, PO Box PO Box 222 Skøyen, 0213 Oslo, Norway
| | - Jan Vondráček
- Department of Cytokinetics, Institute of Biophysics of the Czech Academy of Sciences, 61265 Brno, Czech Republic
| | - Miroslav Machala
- Department of Pharmacology and Toxicology, Veterinary Research Institute, 62100 Brno, Czech Republic
| | - Dominique Lagadic-Gossmann
- Univ Rennes, Inserm, EHESP, Irset (Institut de Recherche en Santé, Environnement et Travail), UMR_S 1085, F-35000, Rennes, France
| | - Christoph F A Vogel
- Department of Environmental Toxicology and Center for Health and the Environment, University of California, Davis, CA 95616, USA
| | - Eric Le Ferrec
- 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
| | - Johan Øvrevik
- Department of Biosciences, Faculty of Mathematics and Natural Sciences, University of Oslo, PO Box 1066 Blindern, 0316 Oslo, Norway; Division of Climate and Environmental Health, Norwegian Institute of Public Health, PO Box 222 Skøyen, 0213 Oslo, Norway.
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5
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Steidemann MM, Liu J, Bayes K, Castro LP, Ferguson-Miller S, LaPres JJ. Evidence for crosstalk between the aryl hydrocarbon receptor and the translocator protein in mouse lung epithelial cells. Exp Cell Res 2023; 429:113617. [PMID: 37172753 PMCID: PMC10330775 DOI: 10.1016/j.yexcr.2023.113617] [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: 09/21/2022] [Revised: 04/07/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023]
Abstract
Cellular homeostasis requires the use of multiple environmental sensors that can respond to a variety of endogenous and exogenous compounds. The aryl hydrocarbon receptor (AHR) is classically known as a transcription factor that induces genes that encode drug metabolizing enzymes when bound to toxicants such as 2,3,7,8-tetrachlorodibenzo-ρ-dioxin (TCDD). The receptor has a growing number of putative endogenous ligands, such as tryptophan, cholesterol, and heme metabolites. Many of these compounds are also linked to the translocator protein (TSPO), an outer mitochondrial membrane protein. Given a portion of the cellular pool of the AHR has also been localized to mitochondria and the overlap in putative ligands, we tested the hypothesis that crosstalk exists between the two proteins. CRISPR/Cas9 was used to create knockouts for AHR and TSPO in a mouse lung epithelial cell line (MLE-12). WT, AHR-/-, and TSPO-/- cells were then exposed to AHR ligand (TCDD), TSPO ligand (PK11195), or both and RNA-seq was performed. More mitochondrial-related genes were altered by loss of both AHR and TSPO than would have been expected just by chance. Some of the genes altered included those that encode for components of the electron transport system and the mitochondrial calcium uniporter. Both proteins altered the activity of the other as AHR loss caused the increase of TSPO at both the mRNA and protein level and loss of TSPO significantly increased the expression of classic AHR battery genes after TCDD treatment. This research provides evidence that AHR and TSPO participate in similar pathways that contribute to mitochondrial homeostasis.
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Affiliation(s)
- Michelle M Steidemann
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, 48824, United States; Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, United States
| | - Jian Liu
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, United States
| | - Kalin Bayes
- Department of Integrative Biology, Michigan State University, East Lansing, MI, 48824, United States
| | - Lizbeth P Castro
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, United States; Department of Cell and Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, United States
| | - Shelagh Ferguson-Miller
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, United States
| | - John J LaPres
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, United States; Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, United States.
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6
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Bassot A, Morio B, Bortoli S, Coumoul X. Le B-A-BA de la mitochondrie, une cheffe d’orchestre intracellulaire très dynamique. CAHIERS DE NUTRITION ET DE DIÉTÉTIQUE 2022. [DOI: 10.1016/j.cnd.2022.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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7
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Im S, Kang S, Kim JH, Oh SJ, Pak YK. Low-Dose Dioxin Reduced Glucose Uptake in C2C12 Myocytes: The Role of Mitochondrial Oxidative Stress and Insulin-Dependent Calcium Mobilization. Antioxidants (Basel) 2022; 11:2109. [PMID: 36358481 PMCID: PMC9686767 DOI: 10.3390/antiox11112109] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/17/2022] [Accepted: 10/24/2022] [Indexed: 01/14/2024] Open
Abstract
Chronic exposure to some environmental polluting chemicals (EPCs) is strongly associated with metabolic syndrome, and insulin resistance is a major biochemical abnormality in the skeletal muscle in patients with metabolic syndrome. However, the causal relationship is inconsistent and little is known about how EPCs affect the insulin signaling cascade in skeletal muscle. Here, we investigated whether exposure to 100 pM of 2,3,7,8-tetrachlorodibenzodioxin (TCDD) as a low dose of dioxin induces insulin resistance in C2C12 myocytes. The treatment with TCDD inhibited the insulin-stimulated glucose uptake and translocation of glucose transporter 4 (GLUT4). The low-dose TCDD reduced the expression of insulin receptor β (IRβ) and insulin receptor substrate (IRS)-1 without affecting the phosphorylation of Akt. The TCDD impaired mitochondrial activities, leading to reactive oxygen species (ROS) production and the blockage of insulin-induced Ca2+ release. All TCDD-mediated effects related to insulin resistance were still observed in aryl hydrocarbon receptor (AhR)-deficient myocytes and prevented by MitoTEMPO, a mitochondria-targeting ROS scavenger. These results suggest that low-dose TCDD stress may induce muscle insulin resistance AhR-independently and that mitochondrial oxidative stress is a novel therapeutic target for dioxin-induced insulin resistance.
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Affiliation(s)
- Suyeol Im
- Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Sora Kang
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Ji Hwan Kim
- Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Seung Jun Oh
- Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea
| | - Youngmi Kim Pak
- Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea
- Department of Neuroscience, Graduate School, Kyung Hee University, Seoul 02447, Korea
- Department of Physiology, School of Medicine, Biomedical Science Institute CRI, Kyung Hee University, Seoul 02447, Korea
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8
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Imran M, Chalmel F, Sergent O, Evrard B, Le Mentec H, Legrand A, Dupont A, Bescher M, Bucher S, Fromenty B, Huc L, Sparfel L, Lagadic-Gossmann D, Podechard N. Transcriptomic analysis in zebrafish larvae identifies iron-dependent mitochondrial dysfunction as a possible key event of NAFLD progression induced by benzo[a]pyrene/ethanol co-exposure. Cell Biol Toxicol 2022:10.1007/s10565-022-09706-4. [PMID: 35412187 DOI: 10.1007/s10565-022-09706-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 02/28/2022] [Indexed: 11/02/2022]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a worldwide epidemic for which environmental contaminants are increasingly recognized as important etiological factors. Among them, the combination of benzo[a]pyrene (B[a]P), a potent environmental carcinogen, with ethanol, was shown to induce the transition of steatosis toward steatohepatitis. However, the underlying mechanisms involved remain to be deciphered. In this context, we used high-fat diet fed zebrafish model, in which we previously observed progression of steatosis to a steatohepatitis-like state following a 7-day-co-exposure to 43 mM ethanol and 25 nM B[a]P. Transcriptomic analysis highlighted the potent role of mitochondrial dysfunction, alterations in heme and iron homeostasis, involvement of aryl hydrocarbon receptor (AhR) signaling, and oxidative stress. Most of these mRNA dysregulations were validated by RT-qPCR. Moreover, similar changes were observed using a human in vitro hepatocyte model, HepaRG cells. The mitochondria structural and functional alterations were confirmed by transmission electronic microscopy and Seahorse technology, respectively. Involvement of AhR signaling was evidenced by using in vivo an AhR antagonist, CH223191, and in vitro in AhR-knock-out HepaRG cells. Furthermore, as co-exposure was found to increase the levels of both heme and hemin, we investigated if mitochondrial iron could induce oxidative stress. We found that mitochondrial labile iron content was raised in toxicant-exposed larvae. This increase was prevented by the iron chelator, deferoxamine, which also inhibited liver co-exposure toxicity. Overall, these results suggest that the increase in mitochondrial iron content induced by B[a]P/ethanol co-exposure causes mitochondrial dysfunction that contributes to the pathological progression of NAFLD.
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Affiliation(s)
- Muhammad Imran
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé environnement et travail) - UMR_S 1085, F-35000, Rennes, France.,Iqra University, Karachi, Pakistan
| | - Frédéric Chalmel
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé environnement et travail) - UMR_S 1085, F-35000, Rennes, France
| | - Odile Sergent
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé environnement et travail) - UMR_S 1085, F-35000, Rennes, France
| | - Bertrand Evrard
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé environnement et travail) - UMR_S 1085, F-35000, Rennes, France
| | - Hélène Le Mentec
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé environnement et travail) - UMR_S 1085, F-35000, Rennes, France
| | - Antoine Legrand
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé environnement et travail) - UMR_S 1085, F-35000, Rennes, France
| | - Aurélien Dupont
- Univ Rennes, Biosit - UMS 3480, US_S 018, F-35000, Rennes, France
| | - Maëlle Bescher
- 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, Inrae, Institut NUMECAN (Nutrition Metabolisms and Cancer)-UMR_S 13 1241, and UMR_A 1341, 35000, Rennes, France
| | - Bernard Fromenty
- Univ Rennes, Inserm, Inrae, Institut NUMECAN (Nutrition Metabolisms and Cancer)-UMR_S 13 1241, and UMR_A 1341, 35000, Rennes, France
| | - Laurence Huc
- Université de Toulouse, Inrae, ENVT, INP-Purpan, UPS, Toxalim (Research Centre in Food Toxicology), 31027, Toulouse, France
| | - Lydie Sparfel
- 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
| | - Normand Podechard
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé environnement et travail) - UMR_S 1085, F-35000, Rennes, France.
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9
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Luo Y, Zhang B, Geng N, Sun S, Song X, Chen J, Zhang H. Transcriptomics and metabolomics analyses provide insights into the difference in toxicity of benzo[a]pyrene and 6-chlorobenzo[a]pyrene to human hepatic cells. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 812:152242. [PMID: 34919925 DOI: 10.1016/j.scitotenv.2021.152242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 12/03/2021] [Accepted: 12/04/2021] [Indexed: 06/14/2023]
Abstract
The toxicological information of chlorinated polycyclic aromatic hydrocarbons (Cl-PAHs), as derivatives of PAHs, is still relatively lacking. In this study, a combination of transcriptomics and metabolomics approach was adopted to explore the changes in toxicity to human L02 hepatocytes after chlorination of benzo[a]pyrene (B[a]P) at 6 position. In general, 6-Cl-B[a]P produced a stronger toxicity to human hepatic cells than did parent B[a]P. When exposure concentrations were 5 and 50 nM, 6-Cl-B[a]P caused a weaker transcriptomic perturbation relative to B[a]P, whereas a stronger metabolomic perturbation, a stronger oxidative stress and a stronger inhibition effect on cell viability were caused by 6-Cl-B[a]P than did parent B[a]P. Pathway enrichment analysis indicated that 6-Cl-B[a]P produced a more widely perturbation to metabolic pathways than did B[a]P. Although they both significantly impaired the function of mitochondrial electron transport chain (ETC), the exact mechanism is different. B[a]P suppressed the expression of 20 genes regulating mitochondrial ETC mainly via AhR activation. However, 6-Cl-B[a]P produced a stronger inhibition on the activities of complexes I and V than did B[a]P. Meanwhile, 6-Cl-B[a]P also exhibited a stronger inhibition effect on mitochondrial β oxidation of fatty acid. Furthermore, 6-Cl-B[a]P and B[a]P both significantly disturbed the nucleotide metabolism, glycerophospholipid metabolism and amino acid metabolism in L02 cells.
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Affiliation(s)
- Yun Luo
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Baoqin Zhang
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Ningbo Geng
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Shuai Sun
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyao Song
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Jiping Chen
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Haijun Zhang
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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Aranguren-Abadía L, Yadetie F, Donald CE, Sørhus E, Myklatun LE, Zhang X, Lie KK, Perrichon P, Nakken CL, Durif C, Shema S, Browman HI, Skiftesvik AB, Goksøyr A, Meier S, Karlsen OA. Photo-enhanced toxicity of crude oil on early developmental stages of Atlantic cod (Gadus morhua). THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:150697. [PMID: 34610396 DOI: 10.1016/j.scitotenv.2021.150697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/26/2021] [Accepted: 09/26/2021] [Indexed: 06/13/2023]
Abstract
Photo-enhanced toxicity of crude oil is produced by exposure to ultraviolet (UV) radiation. Atlantic cod (Gadus morhua) embryos were exposed to crude oil with and without UV radiation (290-400 nm) from 3 days post fertilization (dpf) until 6 dpf. Embryos from the co-exposure experiment were continually exposed to UV radiation until hatching at 11 dpf. Differences in body burden levels and cyp1a expression in cod embryos were observed between the exposure regimes. High doses of crude oil produced increased mortality in cod co-exposed embryos, as well as craniofacial malformations and heart deformities in larvae from both experiments. A higher number of differentially expressed genes (DEGs) and pathways were revealed in the co-exposure experiment, indicating a photo-enhanced effect of crude oil toxicity. Our results provide mechanistic insights into crude oil and photo-enhanced crude oil toxicity, suggesting that UV radiation increases the toxicity of crude oil in early life stages of Atlantic cod.
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Affiliation(s)
| | - Fekadu Yadetie
- Department of Biological Sciences, University of Bergen, Bergen, Norway
| | | | - Elin Sørhus
- Institute of Marine Research, Bergen, Norway
| | | | - Xiaokang Zhang
- Department of Molecular Oncology, Institute for Cancer Research, Oslo University Hospital-Radiumhospitalet, Oslo, Norway
| | - Kai K Lie
- Institute of Marine Research, Bergen, Norway
| | | | | | - Caroline Durif
- Institute of Marine Research, Austevoll Research Station, Storebø, Norway
| | - Steven Shema
- Grótti ehf., Grundarstíg 4, 101 Reykjavík, Iceland
| | - Howard I Browman
- Institute of Marine Research, Austevoll Research Station, Storebø, Norway
| | | | - Anders Goksøyr
- Department of Biological Sciences, University of Bergen, Bergen, Norway
| | | | - Odd André Karlsen
- Department of Biological Sciences, University of Bergen, Bergen, Norway.
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11
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Duarte-Hospital C, Tête A, Brial F, Benoit L, Koual M, Tomkiewicz C, Kim MJ, Blanc EB, Coumoul X, Bortoli S. Mitochondrial Dysfunction as a Hallmark of Environmental Injury. Cells 2021; 11:cells11010110. [PMID: 35011671 PMCID: PMC8750015 DOI: 10.3390/cells11010110] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/24/2021] [Accepted: 12/27/2021] [Indexed: 02/07/2023] Open
Abstract
Environmental factors including diet, sedentary lifestyle and exposure to pollutants largely influence human health throughout life. Cellular and molecular events triggered by an exposure to environmental pollutants are extremely variable and depend on the age, the chronicity and the doses of exposure. Only a fraction of all relevant mechanisms involved in the onset and progression of pathologies in response to toxicants has probably been identified. Mitochondria are central hubs of metabolic and cell signaling responsible for a large variety of biochemical processes, including oxidative stress, metabolite production, energy transduction, hormone synthesis, and apoptosis. Growing evidence highlights mitochondrial dysfunction as a major hallmark of environmental insults. Here, we present mitochondria as crucial organelles for healthy metabolic homeostasis and whose dysfunction induces critical adverse effects. Then, we review the multiple mechanisms of action of pollutants causing mitochondrial toxicity in link with chronic diseases. We propose the Aryl hydrocarbon Receptor (AhR) as a model of “exposome receptor”, whose activation by environmental pollutants leads to various toxic events through mitochondrial dysfunction. Finally, we provide some remarks related to mitotoxicity and risk assessment.
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Affiliation(s)
- Carolina Duarte-Hospital
- Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, T3S, INSERM UMR-S 1124, F-75006 Paris, France; (C.D.-H.); (A.T.); (F.B.); (L.B.); (M.K.); (C.T.); (M.J.K.); (E.B.B.)
- Faculty of Sciences, Université de Paris, F-75006 Paris, France
| | - Arnaud Tête
- Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, T3S, INSERM UMR-S 1124, F-75006 Paris, France; (C.D.-H.); (A.T.); (F.B.); (L.B.); (M.K.); (C.T.); (M.J.K.); (E.B.B.)
- Faculty of Sciences, Université de Paris, F-75006 Paris, France
| | - François Brial
- Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, T3S, INSERM UMR-S 1124, F-75006 Paris, France; (C.D.-H.); (A.T.); (F.B.); (L.B.); (M.K.); (C.T.); (M.J.K.); (E.B.B.)
| | - Louise Benoit
- Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, T3S, INSERM UMR-S 1124, F-75006 Paris, France; (C.D.-H.); (A.T.); (F.B.); (L.B.); (M.K.); (C.T.); (M.J.K.); (E.B.B.)
- Faculty of Sciences, Université de Paris, F-75006 Paris, France
| | - Meriem Koual
- Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, T3S, INSERM UMR-S 1124, F-75006 Paris, France; (C.D.-H.); (A.T.); (F.B.); (L.B.); (M.K.); (C.T.); (M.J.K.); (E.B.B.)
- Faculty of Sciences, Université de Paris, F-75006 Paris, France
| | - Céline Tomkiewicz
- Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, T3S, INSERM UMR-S 1124, F-75006 Paris, France; (C.D.-H.); (A.T.); (F.B.); (L.B.); (M.K.); (C.T.); (M.J.K.); (E.B.B.)
- Faculty of Sciences, Université de Paris, F-75006 Paris, France
| | - Min Ji Kim
- Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, T3S, INSERM UMR-S 1124, F-75006 Paris, France; (C.D.-H.); (A.T.); (F.B.); (L.B.); (M.K.); (C.T.); (M.J.K.); (E.B.B.)
- Université Sorbonne Paris Nord, F-93000 Bobigny, France
| | - Etienne B. Blanc
- Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, T3S, INSERM UMR-S 1124, F-75006 Paris, France; (C.D.-H.); (A.T.); (F.B.); (L.B.); (M.K.); (C.T.); (M.J.K.); (E.B.B.)
- Faculty of Sciences, Université de Paris, F-75006 Paris, France
| | - Xavier Coumoul
- Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, T3S, INSERM UMR-S 1124, F-75006 Paris, France; (C.D.-H.); (A.T.); (F.B.); (L.B.); (M.K.); (C.T.); (M.J.K.); (E.B.B.)
- Faculty of Sciences, Université de Paris, F-75006 Paris, France
- Correspondence: (X.C.); (S.B.); Tel.: +33-1-76-53-43-70 (S.B.)
| | - Sylvie Bortoli
- Environmental Toxicity, Therapeutic Targets, Cellular Signaling and Biomarkers, T3S, INSERM UMR-S 1124, F-75006 Paris, France; (C.D.-H.); (A.T.); (F.B.); (L.B.); (M.K.); (C.T.); (M.J.K.); (E.B.B.)
- Faculty of Sciences, Université de Paris, F-75006 Paris, France
- Correspondence: (X.C.); (S.B.); Tel.: +33-1-76-53-43-70 (S.B.)
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12
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Wang HC, Liu KY, Wang LT, Hsu SH, Wang SC, Huang SK. Aryl hydrocarbon receptor promotes lipid droplet biogenesis and metabolic shift in respiratory Club cells. Hum Cell 2021; 34:785-799. [PMID: 33683656 DOI: 10.1007/s13577-021-00491-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 01/14/2021] [Indexed: 10/22/2022]
Abstract
Club cells are critical in maintaining airway integrity via, in part, secretion of immunomodulatory Club cell 10 kd protein (CC10) and xenobiotic detoxification. Aryl hydrocarbon receptor (AhR) is important in xenobiotic metabolism, but its role in Club cell function is unclear. To this end, an AhR ligand, 6-formylindolo[3,2-b]carbazole (FICZ, 10 nM) was found to induce, in a ligand and AhR-dependent manner, endoplasmic reticulum stress, phospholipid remodeling, free fatty acid and triglyceride synthesis, leading to perilipin 2-dependent lipid droplet (LD) biogenesis in a Club cell-like cell line, NL20. The increase in LDs was due, in part, to the blockade of adipose triglyceride lipase to LDs, while perilipin 5 facilitated LDs-mitochondria connection, leading to the breakdown of LDs via mitochondrial β-oxidation and acetyl-coA generation. In FICZ-treated cells, increased CC10 secretion and its intracellular association with LDs were noted. Administration of low (0.28 ng), medium (1.42 ng), and high (7.10 ng) doses of FICZ in C57BL/6 mice significantly enhanced lipopolysaccharide (LPS, 0.1 μg)-induced airway inflammation, mucin secretion, pro-inflammatory cytokines and CC10 in the bronchoalveolar lavage fluids, as compared to those seen in mice receiving LPS alone, suggesting the importance of AhR signaling in controlling the metabolic homeostasis and functions of Club cells.
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Affiliation(s)
- Hsueh-Chun Wang
- Graduate Institute of Biomedical Sciences, China Medical University, 91 Hsueh-Shih Rd, North District, Taichung, 40402, Taiwan.
- Research Center for Cancer Biology, China Medical University, Taichung, Taiwan.
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, 40402, Taiwan.
| | - Kwei-Yan Liu
- Department of Allergy, The Third Affiliated Hospital of Shenzhen University, Shenzhen, 518020, China
| | - Li-Ting Wang
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shih-Hsien Hsu
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shao-Chun Wang
- Graduate Institute of Biomedical Sciences, China Medical University, 91 Hsueh-Shih Rd, North District, Taichung, 40402, Taiwan
- Research Center for Cancer Biology, China Medical University, Taichung, Taiwan
- Center for Molecular Medicine, China Medical University Hospital, Taichung, 40447, Taiwan
| | - Shau-Ku Huang
- National Institute of Environmental Health Sciences, National Health Research Institutes, No. 35, Keyan Road, Zhunan, Miaoli County, 35053, Taiwan.
- Division of Allergy and Clinical Immunology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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13
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Brinkmann V, Ale-Agha N, Haendeler J, Ventura N. The Aryl Hydrocarbon Receptor (AhR) in the Aging Process: Another Puzzling Role for This Highly Conserved Transcription Factor. Front Physiol 2020; 10:1561. [PMID: 32009975 PMCID: PMC6971224 DOI: 10.3389/fphys.2019.01561] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 12/11/2019] [Indexed: 12/26/2022] Open
Abstract
Aging is the most important risk factor for the development of major life-threatening diseases such as cardiovascular disorders, cancer, and neurodegenerative disorders. The aging process is characterized by the accumulation of damage to intracellular macromolecules and it is concurrently shaped by genetic, environmental and nutritional factors. These factors influence the functionality of mitochondria, which play a central role in the aging process. Mitochondrial dysfunction is one of the hallmarks of aging and is associated with increased fluxes of ROS leading to damage of mitochondrial components, impaired metabolism of fatty acids, dysregulated glucose metabolism, and damage of adjacent organelles. Interestingly, many of the environmental (e.g., pollutants and other toxicants) and nutritional (e.g., flavonoids, carotenoids) factors influencing aging and mitochondrial function also directly or indirectly affect the activity of a highly conserved transcription factor, the Aryl hydrocarbon Receptor (AhR). Therefore, it is not surprising that many studies have already indicated a role of this versatile transcription factor in the aging process. We also recently found that the AhR promotes aging phenotypes across species. In this manuscript, we systematically review the existing literature on the contradictory studies indicating either pro- or anti-aging effects of the AhR and try to reconcile the seemingly conflicting data considering a possible dependency on the animal model, tissue, as well as level of AhR expression and activation. Moreover, given the crucial role of mitochondria in the aging process, we summarize the growing body of evidence pointing toward the influence of AhR on mitochondria, which can be of potential relevance for aging.
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Affiliation(s)
- Vanessa Brinkmann
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | - Niloofar Ale-Agha
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | - Judith Haendeler
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany.,Institute of Clinical Chemistry and Laboratory Diagnostic, Medical Faculty, Heinrich Heine University of Düsseldorf, Düsseldorf, Germany
| | - Natascia Ventura
- IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany.,Institute of Clinical Chemistry and Laboratory Diagnostic, Medical Faculty, Heinrich Heine University of Düsseldorf, Düsseldorf, Germany
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14
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Song Y, Nahrgang J, Tollefsen KE. Transcriptomic analysis reveals dose-dependent modes of action of benzo(a)pyrene in polar cod (Boreogadus saida). THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 653:176-189. [PMID: 30408666 DOI: 10.1016/j.scitotenv.2018.10.261] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 10/15/2018] [Accepted: 10/19/2018] [Indexed: 06/08/2023]
Abstract
Polar cod (Boreogadus saida) has been used as a model Arctic species for hazard assessment of environmental stressors such as polycyclic aromatic hydrocarbons (PAHs). However, most of the PAH studies using polar cod rely on targeted biomarker-based analysis thus may not adequately address the complexity of the toxic mechanisms of the stressors. The present study was performed to develop a broad-content transcriptomic platform for polar cod and apply it for understanding the toxic mechanisms of a model PAH, benzo(a)pyrene (BaP). Hepatic transcriptional analysis using a combination of high-density polar cod oligonucleotide microarray and quantitative real-time RT-PCR was conducted to characterize the stress responses in polar cod after 14d repeated dietary exposure to 0.4 (Low) and 20.3 μg/g fish/feeding (High) BaP doses. Bile metabolic analysis was performed to identify the storage of a key BaP hepatic biotransformation product, 3-hydroxybenzo(a)pyrene (3-OH-BaP). The results clearly showed that 3-OH-BaP was detected in the bile of polar cod after both Low and High BaP exposure. Dose-dependent hepatic stress responses were identified, with Low BaP suppressing genes involved in the defense mechanisms and High BaP inducing genes associated with these pathways. The results suggested that activation of the aryl hydrocarbon receptor signaling, induction of oxidative stress, DNA damage and apoptosis were the common modes of action (MoA) of BaP between polar cod or other vertebrates, whereas induction of protein degradation and disturbance of mitochondrial functions were proposed as novel MoAs. Furthermore, conceptual toxicity pathways were proposed for BaP-mediated effects in Arctic fish. The present study has for the first time reported a transcriptome-wide analysis using a polar cod-specific microarray and suggested novel MoAs of BaP. The analytical tools, bioinformatics solutions and mechanistic knowledge generated by this study may facilitate mechanistically-based hazard assessment of environmental stressors in the Arctic using this important fish as a model species.
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Affiliation(s)
- You Song
- Norwegian Institute for Water Research (NIVA), Section of Ecotoxicology and Risk Assessment, Gaustadalléen 21, N-0349 Oslo, Norway.
| | - Jasmine Nahrgang
- UiT The Arctic University of Norway, Faculty of Biosciences, Fisheries and Economics, Dept. of Arctic and Marine Biology, N-9037 Tromsø, Norway
| | - Knut Erik Tollefsen
- Norwegian Institute for Water Research (NIVA), Section of Ecotoxicology and Risk Assessment, Gaustadalléen 21, N-0349 Oslo, Norway; Norwegian University of Life Sciences (NMBU), Faculty of Environmental Sciences and Natural Resource Management, Dept. for Environmental Sciences, Post box 5003, N-1432 Ås, Norway.
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15
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Aryl hydrocarbon receptor pathway participates in myocardial ischemia reperfusion injury by regulating mitochondrial apoptosis. Med Hypotheses 2019; 123:2-5. [DOI: 10.1016/j.mehy.2018.12.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 12/06/2018] [Indexed: 01/28/2023]
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16
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Zou S, Zhu L, Huang K, Luo H, Xu W, He X. Adipose tissues of MPC1 ± mice display altered lipid metabolism-related enzyme expression levels. PeerJ 2018; 6:e5799. [PMID: 30397542 PMCID: PMC6214228 DOI: 10.7717/peerj.5799] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 09/20/2018] [Indexed: 12/23/2022] Open
Abstract
Mitochondrial pyruvate carrier 1 (MPC1) is a component of the MPC1/MPC2 heterodimer that facilitates the transport of pyruvate into mitochondria. Pyruvate plays a central role in carbohydrate, fatty, and amino acid catabolism. The present study examined epididymal white adipose tissue (eWAT) and intrascapular brown adipose tissue (iBAT) from MPC1± mice following 24 weeks of feeding, which indicated low energy accumulation as evidenced by low body and eWAT weight and adipocyte volume. To characterize molecular changes in energy metabolism, we analyzed the transcriptomes of the adipose tissues using RNA-Sequencing (RNA-Seq). The results showed that the fatty acid oxidation pathway was activated and several genes involved in this pathway were upregulated. Furthermore, qPCR and western blotting indicated that numerous genes and proteins that participate in lipolysis were also upregulated. Based on these findings, we propose that the energy deficiency caused by reduced MPC1 activity can be alleviated by activating the lipolytic pathway.
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Affiliation(s)
- Shiying Zou
- China Agricultural University, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, Beijing, China.,Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, Beijing, China
| | - Liye Zhu
- China Agricultural University, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, Beijing, China.,Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, Beijing, China
| | - Kunlun Huang
- China Agricultural University, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, Beijing, China.,Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, Beijing, China
| | - Haoshu Luo
- China Agricultural University, College of Biological Sciences, Beijing, China
| | - Wentao Xu
- China Agricultural University, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, Beijing, China.,Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, Beijing, China
| | - Xiaoyun He
- China Agricultural University, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, Beijing, China.,Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, Beijing, China
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17
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Possible Involvement of Mitochondrial Dysfunction and Oxidative Stress in a Cellular Model of NAFLD Progression Induced by Benzo[a]pyrene/Ethanol CoExposure. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:4396403. [PMID: 30147834 PMCID: PMC6083493 DOI: 10.1155/2018/4396403] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 06/18/2018] [Accepted: 06/26/2018] [Indexed: 12/11/2022]
Abstract
Exposure to xenobiotics could favor the transition of nonalcoholic fatty liver (NAFL) to nonalcoholic steatohepatitis in obese patients. Recently, we showed in different models of NAFL that benzo[a]pyrene (B[a]P) and ethanol coexposure induced a steatohepatitis-like state. One model was HepaRG cells incubated with stearate and oleate for 2 weeks. In the present study, we wished to determine in this model whether mitochondrial dysfunction and reactive oxygen species (ROS) overproduction could be involved in the occurrence of this steatohepatitis-like state. CRISPR/Cas9-modified cells were also used to specify the role of aryl hydrocarbon receptor (AhR), which is potently activated by B[a]P. Thus, nonsteatotic and steatotic HepaRG cells were treated with B[a]P, ethanol, or both molecules for 2 weeks. B[a]P/ethanol coexposure reduced mitochondrial respiratory chain activity, mitochondrial respiration, and mitochondrial DNA levels and induced ROS overproduction in steatotic HepaRG cells. These deleterious effects were less marked or absent in steatotic cells treated with B[a]P alone or ethanol alone and in nonsteatotic cells treated with B[a]P/ethanol. Our study also disclosed that B[a]P/ethanol-induced impairment of mitochondrial respiration was dependent on AhR activation. Hence, mitochondrial dysfunction and ROS generation could explain the occurrence of a steatohepatitis-like state in steatotic HepaRG cells exposed to B[a]P and ethanol.
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18
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Bortoli S, Boutet-Robinet E, Lagadic-Gossmann D, Huc L. Nrf2 and AhR in metabolic reprogramming after contaminant exposure. CURRENT OPINION IN TOXICOLOGY 2018. [DOI: 10.1016/j.cotox.2017.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Choudhury AR, Singh KK. Mitochondrial determinants of cancer health disparities. Semin Cancer Biol 2017; 47:125-146. [PMID: 28487205 PMCID: PMC5673596 DOI: 10.1016/j.semcancer.2017.05.001] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 04/25/2017] [Accepted: 05/03/2017] [Indexed: 01/10/2023]
Abstract
Mitochondria, which are multi-functional, have been implicated in cancer initiation, progression, and metastasis due to metabolic alterations in transformed cells. Mitochondria are involved in the generation of energy, cell growth and differentiation, cellular signaling, cell cycle control, and cell death. To date, the mitochondrial basis of cancer disparities is unknown. The goal of this review is to provide an understanding and a framework of mitochondrial determinants that may contribute to cancer disparities in racially different populations. Due to maternal inheritance and ethnic-based diversity, the mitochondrial genome (mtDNA) contributes to inherited racial disparities. In people of African ancestry, several germline, population-specific haplotype variants in mtDNA as well as depletion of mtDNA have been linked to cancer predisposition and cancer disparities. Indeed, depletion of mtDNA and mutations in mtDNA or nuclear genome (nDNA)-encoded mitochondrial proteins lead to mitochondrial dysfunction and promote resistance to apoptosis, the epithelial-to-mesenchymal transition, and metastatic disease, all of which can contribute to cancer disparity and tumor aggressiveness related to racial disparities. Ethnic differences at the level of expression or genetic variations in nDNA encoding the mitochondrial proteome, including mitochondria-localized mtDNA replication and repair proteins, miRNA, transcription factors, kinases and phosphatases, and tumor suppressors and oncogenes may underlie susceptibility to high-risk and aggressive cancers found in African population and other ethnicities. The mitochondrial retrograde signaling that alters the expression profile of nuclear genes in response to dysfunctional mitochondria is a mechanism for tumorigenesis. In ethnic populations, differences in mitochondrial function may alter the cross talk between mitochondria and the nucleus at epigenetic and genetic levels, which can also contribute to cancer health disparities. Targeting mitochondrial determinants and mitochondrial retrograde signaling could provide a promising strategy for the development of selective anticancer therapy for dealing with cancer disparities. Further, agents that restore mitochondrial function to optimal levels should permit sensitivity to anticancer agents for the treatment of aggressive tumors that occur in racially diverse populations and hence help in reducing racial disparities.
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Affiliation(s)
| | - Keshav K Singh
- Departments of Genetics, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; Departments of Pathology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; Departments of Environmental Health, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; Center for Aging, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; UAB Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, 35294, USA; Birmingham Veterans Affairs Medical Center, Birmingham, AL, 35294, USA.
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20
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Ecological significance of mitochondrial toxicants. Toxicology 2017; 391:64-74. [DOI: 10.1016/j.tox.2017.07.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 07/19/2017] [Accepted: 07/24/2017] [Indexed: 12/15/2022]
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21
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Solanki HS, Babu N, Jain AP, Bhat MY, Puttamallesh VN, Advani J, Raja R, Mangalaparthi KK, Kumar MM, Prasad TSK, Mathur PP, Sidransky D, Gowda H, Chatterjee A. Cigarette smoke induces mitochondrial metabolic reprogramming in lung cells. Mitochondrion 2017; 40:58-70. [PMID: 29042306 DOI: 10.1016/j.mito.2017.10.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 09/18/2017] [Accepted: 10/06/2017] [Indexed: 01/01/2023]
Abstract
Cellular transformation owing to cigarette smoking is due to chronic exposure and not acute. However, systematic studies to understand the molecular alterations in lung cells due to cigarette smoke are lacking. To understand these molecular alterations induced by chronic cigarette smoke exposure, we carried out tandem mass tag (TMT) based temporal proteomic profiling of lung cells exposed to cigarette smoke for upto 12months. We identified 2620 proteins in total, of which 671 proteins were differentially expressed (1.5-fold) after 12months of exposure. Prolonged exposure of lung cells to smoke for 12months revealed dysregulation of oxidative phosphorylation and overexpression of enzymes involved in TCA cycle. In addition, we also observed overexpression of enzymes involved in glutamine metabolism, fatty acid degradation and lactate synthesis. This could possibly explain the availability of alternative source of carbon to TCA cycle apart from glycolytic pyruvate. Our data indicates that chronic exposure to cigarette smoke induces mitochondrial metabolic reprogramming in cells to support growth and survival.
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Affiliation(s)
- Hitendra S Solanki
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; School of Biotechnology, KIIT University, Bhubaneswar, Odisha 751024, India
| | - Niraj Babu
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; Manipal University, Madhav Nagar, Manipal 576104, India
| | - Ankit P Jain
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; School of Biotechnology, KIIT University, Bhubaneswar, Odisha 751024, India
| | - Mohd Younis Bhat
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; Amrita School of Biotechnology, Amrita University, Kollam 690 525, India
| | - Vinuth N Puttamallesh
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; Amrita School of Biotechnology, Amrita University, Kollam 690 525, India
| | - Jayshree Advani
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; Manipal University, Madhav Nagar, Manipal 576104, India
| | - Remya Raja
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India
| | - Kiran K Mangalaparthi
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; Amrita School of Biotechnology, Amrita University, Kollam 690 525, India
| | - Mahesh M Kumar
- Department of Neuro-Virology, National Institute of Mental Health and Neurosciences, Bangalore 560029, India
| | - T S Keshava Prasad
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; NIMHANS-IOB Proteomics and Bioinformatics Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bangalore 560029, India; YU-IOB Center for Systems Biology and Molecular Medicine, Yenepoya University, Mangalore 575018, India
| | | | - David Sidransky
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
| | - Harsha Gowda
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India.
| | - Aditi Chatterjee
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India.
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22
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Jayasundara N, Fernando PW, Osterberg JS, Cammen KM, Schultz TF, Di Giulio RT. Cost of Tolerance: Physiological Consequences of Evolved Resistance to Inhabit a Polluted Environment in Teleost Fish Fundulus heteroclitus. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:8763-8772. [PMID: 28682633 PMCID: PMC5745795 DOI: 10.1021/acs.est.7b01913] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Anthropogenic stressors, including pollutants, are key evolutionary drivers. It is hypothesized that rapid evolution to anthropogenic changes may alter fundamental physiological processes (e.g., energy metabolism), compromising an organism's capacity to respond to additional stressors. The Elizabeth River (ER) Superfund site represents a "natural-experiment" to explore this hypothesis in several subpopulations of Atlantic killifish that have evolved a gradation of resistance to a ubiquitous pollutant-polycyclic aromatic hydrocarbons (PAH). We examined bioenergetic shifts and associated consequences in PAH-resistant killifish by integrating genomic, physiological, and modeling approaches. Population genomics data revealed that genomic regions encoding bioenergetic processes are under selection in PAH-adapted fish from the most contaminated ER site and ex vivo studies confirmed altered mitochondrial function in these fish. Further analyses extending to differentially PAH-resistant subpopulations showed organismal level bioenergetic shifts in ER fish that are associated with increased cost of living, decreased performance, and altered metabolic response to temperature stress-an indication of reduced thermal plasticity. A movement model predicted a higher energetic cost for PAH-resistant subpopulations when seeking an optimum habitat. Collectively, we demonstrate that pollution adaption and inhabiting contaminated environments may result in physiological shifts leading to compromised organismal capacity to respond to additional stressors.
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Affiliation(s)
- Nishad Jayasundara
- School of Marine Sciences, University of Maine, Orono, Maine United States
- Nicholas School of the Environment, Duke University, Durham, North Carolina United States
| | - Pani W. Fernando
- Department of Mathematics and Information Technology, University of Leoben, Leoben, Austria
| | - Joshua S. Osterberg
- Duke Marine Lab, Nicholas School of the Environment, Duke University, Beaufort, North Carolina United States
| | - Kristina M. Cammen
- Nicholas School of the Environment, Duke University, Durham, North Carolina United States
- Duke Marine Lab, Nicholas School of the Environment, Duke University, Beaufort, North Carolina United States
| | - Thomas F. Schultz
- Duke Marine Lab, Nicholas School of the Environment, Duke University, Beaufort, North Carolina United States
| | - Richard T. Di Giulio
- Nicholas School of the Environment, Duke University, Durham, North Carolina United States
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23
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Luukkonen J, Höytö A, Viluksela M, Juutilainen J, Naarala J. TCDD-induced mitochondrial superoxide production does not lead to mitochondrial degeneration or genomic instability in human SH-SY5Y neuroblastoma cells. Toxicol In Vitro 2017; 44:213-218. [PMID: 28673561 DOI: 10.1016/j.tiv.2017.06.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 05/30/2017] [Accepted: 06/29/2017] [Indexed: 01/18/2023]
Abstract
Several genotoxic and non-genotoxic agents have been reported to cause delayed genetic damage in the progeny of the exposed cells. Such induced genomic instability (IGI) may be a driving force in carcinogenesis, and it is thus highly important to understand the cellular events accompanying it. The aim of this study was to investigate whether 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) affects mitochondrial integrity and can consequently induce genomic instability. Mitochondrial integrity was evaluated by measuring mitochondrial superoxide production, mitochondrial membrane potential, and mitochondrial activity. Micronucleus formation was used to assess immediate genetic damage and IGI. The assays were performed either immediately, 8 or 15d after the exposure. Mitochondrial superoxide production was increased by TCDD immediately after the exposure. No consistent effects on mitochondrial integrity were observed at later time points, although slightly decreased mitochondrial membrane potential at 8d and increased mitochondrial superoxide potential production at 15 after exposure were observed in the TCDD-exposed cells. TCDD did not cause immediate genetic damage, and significant IGI was not observed. In conclusion, the present results suggest that immediate TCDD-induced increase in mitochondrial superoxide level does not lead to persistent loss of mitochondrial integrity or IGI in human SH-SY5Y neuroblastoma cells.
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Affiliation(s)
- Jukka Luukkonen
- University of Eastern Finland, Department of Environmental and Biological Sciences, Yliopistonranta 1, P.O. Box 1627, FI-70211 Kuopio, Finland.
| | - Anne Höytö
- University of Eastern Finland, Department of Environmental and Biological Sciences, Yliopistonranta 1, P.O. Box 1627, FI-70211 Kuopio, Finland
| | - Matti Viluksela
- University of Eastern Finland, Department of Environmental and Biological Sciences, Yliopistonranta 1, P.O. Box 1627, FI-70211 Kuopio, Finland; National Institute for Health and Welfare, Environmental Health Unit, Kuopio, Finland
| | - Jukka Juutilainen
- University of Eastern Finland, Department of Environmental and Biological Sciences, Yliopistonranta 1, P.O. Box 1627, FI-70211 Kuopio, Finland
| | - Jonne Naarala
- University of Eastern Finland, Department of Environmental and Biological Sciences, Yliopistonranta 1, P.O. Box 1627, FI-70211 Kuopio, Finland
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24
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Raftery TD, Jayasundara N, Di Giulio RT. A bioenergetics assay for studying the effects of environmental stressors on mitochondrial function in vivo in zebrafish larvae. Comp Biochem Physiol C Toxicol Pharmacol 2017; 192:23-32. [PMID: 27939721 PMCID: PMC5218841 DOI: 10.1016/j.cbpc.2016.12.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 12/01/2016] [Accepted: 12/02/2016] [Indexed: 01/29/2023]
Abstract
Mitochondria, an integral component of cellular energy metabolism and other key functions, are extremely vulnerable to damage by environmental stressors. Although methods to measure mitochondrial function in vitro exist, sensitive, medium- to high-throughput assays that assess respiration within physiologically-relevant whole organisms are needed to identify drugs and/or chemicals that disrupt mitochondrial function, particularly at sensitive early developmental stages. Consequently, we have developed and optimized an assay to measure mitochondrial bioenergetics in zebrafish larvae using the XFe24 Extracellular Flux Analyzer. To prevent larval movement from confounding oxygen consumption measurements, we relied on MS-222-based anesthetization. We obtained stable measurement values in the absence of effects on average oxygen consumption rate and subsequently optimized the use of pharmacological agents for metabolic partitioning. To confirm assay reproducibility we demonstrated that triclosan, a positive control, significantly decreased spare respiratory capacity. We then exposed zebrafish from 5 hours post-fertilization (hpf) to 6days post-fertilization (dpf) to three polycyclic aromatic hydrocarbons (PAHs) - benzo(a)pyrene (BaP), phenanthrene (Phe), and fluoranthene (FL) - and measured various fundamental parameters of mitochondrial respiratory chain function, including maximal respiration, spare respiratory capacity, mitochondrial and non-mitochondrial respiration. Exposure to all three PAHs decreased spare respiratory capacity and maximal respiration. Additionally, Phe exposure increased non-mitochondrial respiration and FL exposure decreased mitochondrial respiration and increased non-mitochondrial respiration. Overall, this whole organism-based assay provides a platform for examining mitochondrial dysfunction in vivo at critical developmental stages. It has important implications in biomedical sciences, toxicology and ecophysiology, particularly to examine the effects of environmental chemicals and/or drugs on mitochondrial bioenergetics.
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Affiliation(s)
- Tara D Raftery
- Nicholas School of the Environment, Duke University, Durham, NC 27708, United States.
| | - Nishad Jayasundara
- Nicholas School of the Environment, Duke University, Durham, NC 27708, United States
| | - Richard T Di Giulio
- Nicholas School of the Environment, Duke University, Durham, NC 27708, United States
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25
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Hardonnière K, Huc L, Sergent O, Holme JA, Lagadic-Gossmann D. Environmental carcinogenesis and pH homeostasis: Not only a matter of dysregulated metabolism. Semin Cancer Biol 2017; 43:49-65. [PMID: 28088583 DOI: 10.1016/j.semcancer.2017.01.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 01/05/2017] [Accepted: 01/05/2017] [Indexed: 12/18/2022]
Abstract
According to the World Health Organization, around 20% of all cancers would be due to environmental factors. Among these factors, several chemicals are indeed well recognized carcinogens. The widespread contaminant benzo[a]pyrene (B[a]P), an often used model carcinogen of the polycyclic aromatic hydrocarbons' family, has been suggested to target most, if not all, cancer hallmarks described by Hanahan and Weinberg. It is classified as a group I carcinogen by the International Agency for Research on Cancer; however, the precise intracellular mechanisms underlying its carcinogenic properties remain yet to be thoroughly defined. Recently, the pH homeostasis, a well known regulator of carcinogenic processes, was suggested to be a key actor in both cell death and Warburg-like metabolic reprogramming induced upon B[a]P exposure. The present review will highlight those data with the aim of favoring research on the role of H+ dynamics in environmental carcinogenesis.
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Affiliation(s)
- Kévin Hardonnière
- Institut national de la santé et de la recherche médicale (Inserm), Institut de recherche en santé, environnement et travail (Irset - Inserm UMR 1085), F-35043 Rennes, France; Université de Rennes 1, Structure fédérative de recherche Biosit, UMS CNRS 3480/US Inserm 018, F 35043 Rennes, France
| | - Laurence Huc
- INRA UMR 1331 ToxAlim (Research Center in Food Toxicology), University of Toulouse ENVT, INP, UPS, 180 Chemin de Tournefeuille, F-31027, France
| | - Odile Sergent
- Institut national de la santé et de la recherche médicale (Inserm), Institut de recherche en santé, environnement et travail (Irset - Inserm UMR 1085), F-35043 Rennes, France; Université de Rennes 1, Structure fédérative de recherche Biosit, UMS CNRS 3480/US Inserm 018, F 35043 Rennes, France
| | - Jørn A Holme
- Domain of Infection Control, Environment and Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Dominique Lagadic-Gossmann
- Institut national de la santé et de la recherche médicale (Inserm), Institut de recherche en santé, environnement et travail (Irset - Inserm UMR 1085), F-35043 Rennes, France; Université de Rennes 1, Structure fédérative de recherche Biosit, UMS CNRS 3480/US Inserm 018, F 35043 Rennes, France.
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26
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Nacci D, Proestou D, Champlin D, Martinson J, Waits ER. Genetic basis for rapidly evolved tolerance in the wild: adaptation to toxic pollutants by an estuarine fish species. Mol Ecol 2016; 25:5467-5482. [DOI: 10.1111/mec.13848] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 08/22/2016] [Accepted: 08/30/2016] [Indexed: 01/28/2023]
Affiliation(s)
- Diane Nacci
- U.S. Environmental Protection Agency Office of Research and Development National Health and Environmental Effects Research Laboratory Atlantic Ecology Division 27 Tarzwell Dr. Narragansett RI 02882 USA
| | - Dina Proestou
- U.S. Environmental Protection Agency Office of Research and Development National Health and Environmental Effects Research Laboratory Atlantic Ecology Division 27 Tarzwell Dr. Narragansett RI 02882 USA
| | - Denise Champlin
- U.S. Environmental Protection Agency Office of Research and Development National Health and Environmental Effects Research Laboratory Atlantic Ecology Division 27 Tarzwell Dr. Narragansett RI 02882 USA
| | - John Martinson
- U.S. Environmental Protection Agency Office of Research and Development National Exposure Research Laboratory Ecological Exposure Research Division 26 W. Martin Luther King Dr. Cincinnati OH 45268 USA
| | - Eric R. Waits
- U.S. Environmental Protection Agency Office of Research and Development National Exposure Research Laboratory Ecological Exposure Research Division 26 W. Martin Luther King Dr. Cincinnati OH 45268 USA
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27
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The environmental carcinogen benzo[a]pyrene induces a Warburg-like metabolic reprogramming dependent on NHE1 and associated with cell survival. Sci Rep 2016; 6:30776. [PMID: 27488617 PMCID: PMC4973274 DOI: 10.1038/srep30776] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 07/10/2016] [Indexed: 12/30/2022] Open
Abstract
Cancer cells display alterations in many cellular processes. One core hallmark of cancer is the Warburg effect which is a glycolytic reprogramming that allows cells to survive and proliferate. Although the contributions of environmental contaminants to cancer development are widely accepted, the underlying mechanisms have to be clarified. Benzo[a]pyrene (B[a]P), the prototype of polycyclic aromatic hydrocarbons, exhibits genotoxic and carcinogenic effects, and it is a human carcinogen according to the International Agency for Research on Cancer. In addition to triggering apoptotic signals, B[a]P may induce survival signals, both of which are likely to be involved in cancer promotion. We previously suggested that B[a]P-induced mitochondrial dysfunctions, especially membrane hyperpolarization, might trigger cell survival signaling in rat hepatic epithelial F258 cells. Here, we further characterized these dysfunctions by focusing on energy metabolism. We found that B[a]P promoted a metabolic reprogramming. Cell respiration decreased and lactate production increased. These changes were associated with alterations in the tricarboxylic acid cycle which likely involve a dysfunction of the mitochondrial complex II. The glycolytic shift relied on activation of the Na+/H+ exchanger 1 (NHE1) and appeared to be a key feature in B[a]P-induced cell survival related to changes in cell phenotype (epithelial-to-mesenchymal transition and cell migration).
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28
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Hwang HJ, Steidemann M, Dunivin TK, Rizzo M, LaPres JJ. Data of enzymatic activities of the electron transport chain and ATP synthase complexes in mouse hepatoma cells following exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). Data Brief 2016; 8:93-7. [PMID: 27284569 PMCID: PMC4887554 DOI: 10.1016/j.dib.2016.05.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 05/03/2016] [Accepted: 05/13/2016] [Indexed: 12/03/2022] Open
Abstract
2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is the most widely studied ligand of the aryl hydrocarbon receptor (AHR). The AHR-dependent TCDD-induced mitochondrial hyperpolarization (Tappenden et al., 2011) [1] and reduced oxygen consumption rate of intact mouse hepatoma cells (Huang et al., in press) [2] in the previous studies suggest that these alterations can be related to enzymatic activities of the electron transport chain (ETC) and ATP synthase in oxidative phosphorylation (OXPHOS) system. Here, we evaluated the activity of each complex in the OXPHOS system using in vitro enzymatic assays. The calculated enzymatic activity of each complex was normalized against the activity of citrate synthase. To combine each value from an independent experiment, normalized enzyme activities from cells exposed to TCDD were converted to fold changes via comparison to the activity relative to time-matched vehicle control. The averaged fold change for each treatment suggests more replicates are needed in order to clearly evaluate a difference between treatments.
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Affiliation(s)
- Hye Jin Hwang
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, United States; Center for Mitochondrial Science and Medicine, Michigan State University, East Lansing, MI 48824, United States
| | - Michelle Steidemann
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI 48824-1319, United States; Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI 48824, United States
| | - Taylor K Dunivin
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, United States
| | - Mike Rizzo
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI 48824-1319, United States; Cell and Molecular Biology Graduate Program, Michigan State University, East Lansing, MI 48824, United States
| | - John J LaPres
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, United States; Center for Mitochondrial Science and Medicine, Michigan State University, East Lansing, MI 48824, United States
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29
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Hwang HJ, Dornbos P, Steidemann M, Dunivin TK, Rizzo M, LaPres JJ. Mitochondrial-targeted aryl hydrocarbon receptor and the impact of 2,3,7,8-tetrachlorodibenzo-p-dioxin on cellular respiration and the mitochondrial proteome. Toxicol Appl Pharmacol 2016; 304:121-32. [PMID: 27105554 DOI: 10.1016/j.taap.2016.04.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 04/02/2016] [Accepted: 04/08/2016] [Indexed: 11/18/2022]
Abstract
The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor within the Per-Arnt-Sim (PAS) domain superfamily. Exposure to the most potent AHR ligand, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), is associated with various pathological effects including metabolic syndrome. While research over the last several years has demonstrated a role for oxidative stress and metabolic dysfunction in AHR-dependent TCDD-induced toxicity, the role of the mitochondria in this process has not been fully explored. Our previous research suggested that a portion of the cellular pool of AHR could be found in the mitochondria (mitoAHR). Using a protease protection assay with digitonin extraction, we have now shown that this mitoAHR is localized to the inter-membrane space (IMS) of the organelle. TCDD exposure induced a degradation of mitoAHR similar to that of cytosolic AHR. Furthermore, siRNA-mediated knockdown revealed that translocase of outer-mitochondrial membrane 20 (TOMM20) was involved in the import of AHR into the mitochondria. In addition, TCDD altered cellular respiration in an AHR-dependent manner to maintain respiratory efficiency as measured by oxygen consumption rate (OCR). Stable isotope labeling by amino acids in cell culture (SILAC) identified a battery of proteins within the mitochondrial proteome influenced by TCDD in an AHR-dependent manner. Among these, 17 proteins with fold changes≥2 are associated with various metabolic pathways, suggesting a role of mitochondrial retrograde signaling in TCDD-mediated pathologies. Collectively, these studies suggest that mitoAHR is localized to the IMS and AHR-dependent TCDD-induced toxicity, including metabolic dysfunction, wasting syndrome, and hepatic steatosis, involves mitochondrial dysfunction.
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Affiliation(s)
- Hye Jin Hwang
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, United States; Center for Mitochondrial Science and Medicine, Michigan State University, East Lansing, MI 48824, United States
| | - Peter Dornbos
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, United States; Institute for Integrative Toxicology, Michigan State University, East Lansing, MI 48824-1319, United States
| | - Michelle Steidemann
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI 48824-1319, United States; Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI 48824, United States
| | - Taylor K Dunivin
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, United States
| | - Mike Rizzo
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI 48824-1319, United States; Cell and Molecular Biology Graduate Program, Michigan State University, East Lansing, MI 48824, United States
| | - John J LaPres
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, United States; Center for Mitochondrial Science and Medicine, Michigan State University, East Lansing, MI 48824, United States.
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30
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Esakky P, Hansen DA, Drury AM, Cusumano A, Moley KH. Cigarette smoke-induced cell death of a spermatocyte cell line can be prevented by inactivating the Aryl hydrocarbon receptor. Cell Death Discov 2015; 1:15050. [PMID: 27551479 PMCID: PMC4979462 DOI: 10.1038/cddiscovery.2015.50] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 09/10/2015] [Accepted: 09/12/2015] [Indexed: 11/29/2022] Open
Abstract
Cigarette smoke exposure causes germ cell death during spermatogenesis. Our earlier studies demonstrated that cigarette smoke condensate (CSC) causes spermatocyte cell death in vivo and growth arrest of the mouse spermatocyte cell line (GC-2spd(ts)) in vitro via the aryl hydrocarbon receptor (AHR). We hypothesize here that inactivation of AHR could prevent the CSC-induced cell death in spermatocytes. We demonstrate that CSC exposure generates oxidative stress, which differentially regulates mitochondrial apoptosis in GC-2spd(ts) and wild type (WT) and AHR knockout (AHR-KO) mouse embryonic fibroblasts (MEFs). SiRNA-mediated silencing of Ahr augments the extent of CSC-mediated cellular damage while complementing the AHR-knockout condition. Pharmacological inhibition using the AHR-antagonist (CH223191) modulates the CSC-altered expression of apoptotic proteins and significantly abrogates DNA fragmentation though the cleavage of PARP appears AHR independent. Pretreatment with CH223191 at concentrations above 50 μM significantly prevents the CSC-induced activation of caspase-3/7 and externalization of phosphatidylserine in the plasma membrane. However, MAPK inhibitors alone or together with CH223191 could not prevent the membrane damage upon CSC addition and the caspase-3/7 activation and membrane damage in AHR-deficient MEF indicates the interplay of multiple cell signaling and cytoprotective ability of AHR. Thus the data obtained on one hand signifies the protective role of AHR in maintaining normal cellular homeostasis and the other, could be a potential prophylactic therapeutic target to promote cell survival and growth under cigarette smoke exposed environment by receptor antagonism via CH223191-like mechanism. Antagonist-mediated inactivation of the aryl hydrocarbon receptor blocks downstream events leading to cigarette smoke-induced cell death of a spermatocyte cell line.
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Affiliation(s)
- P Esakky
- Department of Veterans Affairs Medical Center, Washington University School of Medicine, St. Louis, MO, USA
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO, USA
| | - D A Hansen
- Department of Veterans Affairs Medical Center, Washington University School of Medicine, St. Louis, MO, USA
| | - A M Drury
- Department of Veterans Affairs Medical Center, Washington University School of Medicine, St. Louis, MO, USA
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO, USA
| | - A Cusumano
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO, USA
| | - K H Moley
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO, USA
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31
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Benzo[a]pyrene-induced nitric oxide production acts as a survival signal targeting mitochondrial membrane potential. Toxicol In Vitro 2015; 29:1597-608. [DOI: 10.1016/j.tiv.2015.06.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 06/12/2015] [Accepted: 06/13/2015] [Indexed: 01/08/2023]
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32
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Carreira VS, Fan Y, Wang Q, Zhang X, Kurita H, Ko CI, Naticchioni M, Jiang M, Koch S, Medvedovic M, Xia Y, Rubinstein J, Puga A. Ah Receptor Signaling Controls the Expression of Cardiac Development and Homeostasis Genes. Toxicol Sci 2015; 147:425-35. [PMID: 26139165 DOI: 10.1093/toxsci/kfv138] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Congenital heart disease (CHD) is the most common congenital abnormality and one of the leading causes of newborn death throughout the world. Despite much emerging scientific information, the precise etiology of this disease remains elusive. Here, we show that the aryl hydrocarbon receptor (AHR) regulates the expression of crucial cardiogenesis genes and that interference with endogenous AHR functions, either by gene ablation or by agonist exposure during early development, causes overlapping structural and functional cardiac abnormalities that lead to altered fetal heart physiology, including higher heart rates, right and left ventricle dilation, higher stroke volume, and reduced ejection fraction. With striking similarity between AHR knockout (Ahr(-/-)) and agonist-exposed wild type (Ahr(+/+)) embryos, in utero disruption of endogenous AHR functions converge into dysregulation of molecular mechanisms needed for attainment and maintenance of cardiac differentiation, including the pivotal signals regulated by the cardiogenic transcription factor NKH2.5, energy balance via oxidative phosphorylation and TCA cycle and global mitochondrial function and homeostasis. Our findings suggest that AHR signaling in the developing mammalian heart is central to the regulation of pathways crucial for cellular metabolism, cardiogenesis, and cardiac function, which are potential targets of environmental factors associated with CHD.
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Affiliation(s)
- Vinicius S Carreira
- *Department of Environmental Health and Center for Environmental Genetics and
| | - Yunxia Fan
- *Department of Environmental Health and Center for Environmental Genetics and
| | - Qing Wang
- *Department of Environmental Health and Center for Environmental Genetics and
| | - Xiang Zhang
- *Department of Environmental Health and Center for Environmental Genetics and
| | - Hisaka Kurita
- *Department of Environmental Health and Center for Environmental Genetics and
| | - Chia-I Ko
- *Department of Environmental Health and Center for Environmental Genetics and
| | - Mindi Naticchioni
- Department of Internal Medicine, Cardiology Division, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267
| | - Min Jiang
- Department of Internal Medicine, Cardiology Division, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267
| | - Sheryl Koch
- Department of Internal Medicine, Cardiology Division, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267
| | - Mario Medvedovic
- *Department of Environmental Health and Center for Environmental Genetics and
| | - Ying Xia
- *Department of Environmental Health and Center for Environmental Genetics and
| | - Jack Rubinstein
- Department of Internal Medicine, Cardiology Division, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267
| | - Alvaro Puga
- *Department of Environmental Health and Center for Environmental Genetics and
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Aminzadeh S, Vidali S, Sperl W, Kofler B, Feichtinger RG. Energy metabolism in neuroblastoma and Wilms tumor. Transl Pediatr 2015; 4:20-32. [PMID: 26835356 PMCID: PMC4729069 DOI: 10.3978/j.issn.2224-4336.2015.01.04] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
To support high proliferation, the majority of cancer cells undergo fundamental metabolic changes such as increasing their glucose uptake and shifting to glycolysis for ATP production at the expense of far more efficient mitochondrial energy production by oxidative phosphorylation (OXPHOS), which at first glance is a paradox. This phenomenon is known as the Warburg effect. However, enhanced glycolysis is necessary to provide building blocks for anabolic growth. Apart from the generation of ATP, intermediates of glycolysis serve as precursors for a variety of biosynthetic pathways essential for cell proliferation. In the last 10-15 years the field of tumor metabolism has experienced an enormous boom in interest. It is now well established that tumor suppressor genes and oncogenes often play a central role in the regulation of cellular metabolism. Therefore, they significantly contribute to the manifestation of the Warburg effect. While much attention has focused on adult solid tumors, so far there has been comparatively little effort directed at elucidation of the mechanism responsible for the Warburg effect in childhood cancers. In this review we focus on metabolic pathways in neuroblastoma (NB) and Wilms tumor (WT), the two most frequent solid tumors in children. Both tumor types show alterations of the OXPHOS system and glycolytic features. Chromosomal alterations and activation of oncogenes like MYC or inactivation of tumor suppressor genes like TP53 can in part explain the changes of energy metabolism in these cancers. The strict dependence of cancer cells on glucose metabolism is a fairly common feature among otherwise biologically diverse types of cancer. Therefore, inhibition of glycolysis or starvation of cancer cells through glucose deprivation via a high-fat low-carbohydrate diet may be a promising avenue for future adjuvant therapeutic strategies.
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Podrini C, Koffas A, Chokshi S, Vinciguerra M, Lelliott CJ, White JK, Adissu HA, Williams R, Greco A. MacroH2A1 isoforms are associated with epigenetic markers for activation of lipogenic genes in fat-induced steatosis. FASEB J 2014; 29:1676-87. [PMID: 25526730 DOI: 10.1096/fj.14-262717] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 11/24/2014] [Indexed: 01/14/2023]
Abstract
The importance of epigenetic changes in the development of hepatic steatosis is largely unknown. The histone variant macroH2A1 under alternative splicing gives rise to macroH2A1.1 and macroH2A1.2. In this study, we show that the macroH2A1 isoforms play an important role in the regulation of lipid accumulation in hepatocytes. Hepatoma cell line and immortalized human hepatocytes transiently transfected or knocked down with macroH2A1 isoforms were used as in vitro model of fat-induced steatosis. Gene expressions were analyzed by quantitative PCR array and Western blot. Chromatin immunoprecipitation analysis was performed to check the association of histone H3 lysine 27 trimethylation (H3K27me3) and histone H3 lysine 4 trimethylation (H3K4me3) with the promoter of lipogenic genes. Livers from knockout mice that are resistant to lipid deposition despite a high-fat diet were used for histopathology. We found that macroH2A1.2 is regulated by fat uptake and that its overexpression caused an increase in lipid uptake, triglycerides, and lipogenic genes compared with macroH2A1.1. This suggests that macroH2A1.2 is important for lipid uptake, whereas macroH2A1.1 was found to be protective. The result was supported by a high positivity for macroH2A1.1 in knockout mice for genes targeted by macroH2A1 (Atp5a1 and Fam73b), that under a high-fat diet presented minimal lipidosis. Moreover, macroH2A1 isoforms differentially regulate the expression of lipogenic genes by modulating the association of the active (H3K4me3) and repressive (H3K27me3) histone marks on their promoters. This study underlines the importance of the replacement of noncanonical histones in the regulation of genes involved in lipid metabolism in the progression of steatosis.
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Affiliation(s)
- Christine Podrini
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Apostolos Koffas
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Shilpa Chokshi
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Manlio Vinciguerra
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Christopher J Lelliott
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Jacqueline K White
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Hibret A Adissu
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Roger Williams
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Azzura Greco
- *Foundation for Liver Research, Institute of Hepatology, London, United Kingdom; University College London (UCL)--Institute for Liver & Digestive Health, UCL Medical School, London, United Kingdom, Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge, United Kingdom; and Physiology and Experimental Medicine Research Program, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
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2,3,7,8-Tetrachlorodibenzo-p-dioxin induces apoptosis by disruption of intracellular calcium homeostasis in human neuronal cell line SHSY5Y. Apoptosis 2014; 17:1170-81. [PMID: 22986482 DOI: 10.1007/s10495-012-0760-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The persistent xenobiotic agent 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) induces neurotoxic effects that alters neurodevelopment and behavior both during development and adulthood. There are many ongoing efforts to determine the molecular mechanisms of TCDD-mediated neurotoxicity, the signaling pathways involved and its molecular targets in neurons. In this work, we have used SHSY5Y human neuroblastoma cells to characterize the TCDD-induced toxicity. TCDD produces a loss of viability linked to an increased caspase-3 activity, PARP-1 fragmentation, DNA laddering, nuclear fragmentation and hypodiploid (apoptotic) DNA content, in a similar way than staurosporine, a prototypical molecule of apoptosis induction. In addition, TCDD produces a decrease of mitochondrial membrane potential and an increase of intracellular calcium concentration (P < 0.05). Finally, based on the high lipophilic properties of the dioxin, we test the TCDD effect on the membrane integrity using sarcoplasmic reticulum vesicles as a model. TCDD produces calcium efflux through the membrane and an anisotropy decrease (P < 0.05) that reflects an increase in membrane fluidity. Altogether these results support the hypothesis that TCDD toxicity in SHSY5Y neuroblastoma cells provokes the disruption of calcium homeostasis, probably affecting membrane structural integrity, leading to an apoptotic process.
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Tappenden DM, Hwang HJ, Yang L, Thomas RS, LaPres JJ. The Aryl-Hydrocarbon Receptor Protein Interaction Network (AHR-PIN) as Identified by Tandem Affinity Purification (TAP) and Mass Spectrometry. J Toxicol 2013; 2013:279829. [PMID: 24454361 PMCID: PMC3870133 DOI: 10.1155/2013/279829] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 10/09/2013] [Accepted: 10/14/2013] [Indexed: 12/28/2022] Open
Abstract
The aryl-hydrocarbon receptor (AHR), a ligand activated PAS superfamily transcription factor, mediates most, if not all, of the toxicity induced upon exposure to various dioxins, dibenzofurans, and planar polyhalogenated biphenyls. While AHR-mediated gene regulation plays a central role in the toxic response to dioxin exposure, a comprehensive understanding of AHR biology remains elusive. AHR-mediated signaling starts in the cytoplasm, where the receptor can be found in a complex with the heat shock protein of 90 kDa (Hsp90) and the immunophilin-like protein, aryl-hydrocarbon receptor-interacting protein (AIP). The role these chaperones and other putative interactors of the AHR play in the toxic response is not known. To more comprehensively define the AHR-protein interaction network (AHR-PIN) and identify other potential pathways involved in the toxic response, a proteomic approach was undertaken. Using tandem affinity purification (TAP) and mass spectrometry we have identified several novel protein interactions with the AHR. These interactions physically link the AHR to proteins involved in the immune and cellular stress responses, gene regulation not mediated directly via the traditional AHR:ARNT heterodimer, and mitochondrial function. This new insight into the AHR signaling network identifies possible secondary signaling pathways involved in xenobiotic-induced toxicity.
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Affiliation(s)
- Dorothy M. Tappenden
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824-1319, USA
- Center for Integrative Toxicology, Michigan State University, East Lansing, MI 48824-1319, USA
| | - Hye Jin Hwang
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824-1319, USA
- Center for Mitochondrial Science and Medicine, Michigan State University, East Lansing, MI 48824-1319, USA
| | - Longlong Yang
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC 27709, USA
| | - Russell S. Thomas
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC 27709, USA
| | - John J. LaPres
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824-1319, USA
- Center for Integrative Toxicology, Michigan State University, East Lansing, MI 48824-1319, USA
- Center for Mitochondrial Science and Medicine, Michigan State University, East Lansing, MI 48824-1319, USA
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Budinsky RA, Schrenk D, Simon T, Van den Berg M, Reichard JF, Silkworth JB, Aylward LL, Brix A, Gasiewicz T, Kaminski N, Perdew G, Starr TB, Walker NJ, Rowlands JC. Mode of action and dose–response framework analysis for receptor-mediated toxicity: The aryl hydrocarbon receptor as a case study. Crit Rev Toxicol 2013; 44:83-119. [DOI: 10.3109/10408444.2013.835787] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Abass K, Huusko A, Nieminen P, Myllynen P, Pelkonen O, Vahakangas K, Rautio A. Estimation of health risk by using toxicokinetic modelling: a case study of polychlorinated biphenyl PCB153. JOURNAL OF HAZARDOUS MATERIALS 2013; 261:1-10. [PMID: 23911823 DOI: 10.1016/j.jhazmat.2013.07.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 07/04/2013] [Accepted: 07/07/2013] [Indexed: 06/02/2023]
Abstract
To assess potential PCB153-associated human health effects and risks, it is necessary to model past exposure. PCB153 blood concentrations, obtained from the AMAP biomonitoring programme, in Inuit women covering the years 1994-2006 at Disko Bay, 1999-2005 at Nuuk, and 1992-2007 at Nunavik were used to extrapolate body burden and exposure to the whole lifespan of the population by the one-compartment toxicokinetic model. By using risk characterisation modelling, calculated Hazard Quotients were higher than 1 between the years 1955 and 1987 for the 90th population percentile and during 1956-1984 for the 50th population percentile. Cancer risk for overall exposure of PCB153 ranged from 4.6×10(-5) to 1.8×10(-6) for the 90th percentile and 3.6×10(-5) to 1.4×10(-10) for the 50th percentile between 1930 and 2049, when central estimates or upper-bound slope factors were applied. Cancer risk was below 1×10(-6) for the same time period when a lower slope factor was applied. Significant future research requirements to improve health risk characterisation include, among others, larger sample sizes, better analytical accuracy, fewer assumptions in exposure assessment, and consequently, a better choice of the toxicity benchmark used to develop the hazard quotient.
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Affiliation(s)
- Khaled Abass
- Centre for Arctic Medicine, Thule Institute, University of Oulu, Finland.
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Kopec AK, Boverhof DR, Nault R, Harkema JR, Tashiro C, Potter D, Sharratt B, Chittim B, Zacharewski TR. Toxicogenomic evaluation of long-term hepatic effects of TCDD in immature, ovariectomized C57BL/6 mice. Toxicol Sci 2013; 135:465-75. [PMID: 23864506 DOI: 10.1093/toxsci/kft156] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Acute exposure to hepatotoxic doses of 2,3,7,8-tetrachloro- dibenzo-p-dioxin (TCDD) in mice is characterized by differential gene expression that can be phenotypically anchored to elevated levels of serum alanine aminotransferase, increased relative liver weights, hepatic steatosis, inflammation, and hepatocellular necrosis. Unlike most studies that focus on acute exposure effects, this study evaluated the long-term effects of a single oral gavage of 30 μg/kg TCDD at 1, 4, 12, 24, 36, and 72 weeks postdose in ovariectomized C57BL/6 mice. Hepatic TCDD levels were almost completely eliminated by 24 weeks with a calculated half-life of 12 days. Hepatic gene expression analysis identified 395 unique differentially expressed genes between 1 and 12 weeks that decreased to ≤ 8 by 72 weeks, consistent with the minimal hepatic TCDD levels. Hepatic vacuolization, characteristic of short-term exposure, subsided by 4 weeks. Similarly, TCDD-elicited hepatic necrosis and inflammation dissipated by 1 week. Collectively, these results suggest that TCDD-elicited histologic and gene expression responses can be correlated to elevated hepatic TCDD levels, which, once eliminated, elicit minimal hepatic gene expression and histologic alterations.
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Affiliation(s)
- Anna K Kopec
- * Department of Biochemistry & Molecular Biology
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Causal effects of synthetic chemicals on mitochondrial deficits and diabetes pandemic. Arch Pharm Res 2013; 36:178-88. [PMID: 23389879 DOI: 10.1007/s12272-013-0022-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2012] [Accepted: 11/28/2012] [Indexed: 12/13/2022]
Abstract
It is generally accepted that mitochondrial deficits cause many common age-associated diseases including type 2 diabetes. However, it has not been understood what causes mitochondrial damages and how to interrupt the development of the diseases in patients. Recent epidemiologic studies demonstrated a positive correlation between serum concentrations of environmental pollutants and insulin resistance/diabetes. Emerging data strongly suggest that some synthetic pollutants disturb the signaling pathway critical for energy homeostasis and insulin action. The synthetic chemicals are possibly involved in pathogenesis of insulin resistance and diabetes as mitochondria-disturbing agents. In this review, we present a molecular scheme to address the contribution of environmental synthetic chemicals to this metabolic catastrophe. Efforts to identify synthetic chemicals with mitochondria-damaging activities may open a new era to develop effective therapeutic interventions against the worldwide-spreading metabolic disorder.
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Acute effects of TCDD administration: special emphasis on testicular and sperm mitochondrial function. ASIAN PACIFIC JOURNAL OF REPRODUCTION 2012. [DOI: 10.1016/s2305-0500(13)60091-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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