1
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Chaudhry KA, Bianchi-Smiraglia A. The aryl hydrocarbon receptor as a tumor modulator: mechanisms to therapy. Front Oncol 2024; 14:1375905. [PMID: 38807762 PMCID: PMC11130384 DOI: 10.3389/fonc.2024.1375905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 05/03/2024] [Indexed: 05/30/2024] Open
Abstract
The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor that is widely recognized to play important, but complex, modulatory roles in a variety of tumor types. In this review, we comprehensively summarize the increasingly controversial role of AhR as a tumor regulator and the mechanisms by which it alters tumor progression based on the cancer cell type. Finally, we discuss new and emerging strategies to therapeutically modulate AhR, focusing on novel agents that hold promise in current human clinical trials as well as existing FDA-approved drugs that could potentially be repurposed for cancer therapy.
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Affiliation(s)
| | - Anna Bianchi-Smiraglia
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Buffalo, New York, NY, United States
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2
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Abduh MS, Alwassil OI, Aldaqal SM, Alfwuaires MA, Farhan M, Hanieh H. A pyrazolopyridine as a novel AhR signaling activator with anti-breast cancer properties in vitro and in vivo. Biochem Pharmacol 2024; 222:116079. [PMID: 38402910 DOI: 10.1016/j.bcp.2024.116079] [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: 10/06/2023] [Revised: 01/29/2024] [Accepted: 02/22/2024] [Indexed: 02/27/2024]
Abstract
Breast cancer is one of the main causes of malignancy-related deaths globally and has a significant impact on women's quality of life. Despite significant therapeutic advances, there is a medical need for targeted therapies in breast cancer. Aryl hydrocarbon receptor (AhR), a ligand-dependent transcription factor mediates responses to environment stimuli, is emerging as a unique pleiotropic target. Herein, a combined molecular simulation and in vitro investigations identified 3-(3-fluorophenyl)-1H-pyrazolo[3,4-b]pyridine (3FPP) as a novel AhR ligand in T47D and MDA-MB-231 breast cancer cells. Its agonistic effects induced formation of the AhR-AhR nuclear translocator (Arnt) heterodimer and prompted its binding to the penta-nucleotide sequence, called xenobiotic-responsive element (XRE) motif. Moreover, 3FPP augmented the promoter-driven luciferase activities and expression of AhR-regulated genes encoding cytochrome P450 1A1 (CYP1A1) and microRNA (miR)-212/132 cluster. It reduced cell viability, migration, and invasion of both cell lines through AhR signaling. These anticancer properties were concomitant with reduced levels of B-cell lymphoma 2 (BCL-2), SRY-related HMG-box4 (SOX4), snail family zinc finger 2 (SNAI2), and cadherin 2 (CDH2). In vivo, 3FPP suppressed tumor growth and activated AhR signaling in an orthotopic mouse model. In conclusion, our results introduce the fused pyrazolopyridine 3FPP as a novel AhR agonist with AhR-specific anti-breast cancer potential in vitro and in vivo.
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Affiliation(s)
- Maisa S Abduh
- Immune Responses in Different Diseases Research Group, Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia; Center of Excellence in Genomic Medicine Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
| | - Osama I Alwassil
- Department of Pharmaceutical Sciences, College of Pharmacy, King Saud bin Abdulaziz University for Health Sciences, Riyadh 11451, Saudi Arabia.
| | - Saleh M Aldaqal
- Immune Responses in Different Diseases Research Group, Department of Surgery, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
| | - Manal A Alfwuaires
- Department of Biological Sciences, College of Science, King Faisal University, Hofuf 31982, Saudi Arabia.
| | - Mahdi Farhan
- International Medical Research Center (iMReC), Aqaba 77110, Jordan; Drug Development Department, UniTechPharma, Fribourg 1700, Switzerland.
| | - Hamza Hanieh
- International Medical Research Center (iMReC), Aqaba 77110, Jordan; Basic Medical Sciences Department, Faculty of Medicine, Aqaba Medical Sciences University, Aqaba 77110, Jordan.
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3
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Lee J, Beers JL, Geffert RM, Jackson KD. A Review of CYP-Mediated Drug Interactions: Mechanisms and In Vitro Drug-Drug Interaction Assessment. Biomolecules 2024; 14:99. [PMID: 38254699 PMCID: PMC10813492 DOI: 10.3390/biom14010099] [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: 12/15/2023] [Revised: 01/02/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Drug metabolism is a major determinant of drug concentrations in the body. Drug-drug interactions (DDIs) caused by the co-administration of multiple drugs can lead to alteration in the exposure of the victim drug, raising safety or effectiveness concerns. Assessment of the DDI potential starts with in vitro experiments to determine kinetic parameters and identify risks associated with the use of comedication that can inform future clinical studies. The diverse range of experimental models and techniques has significantly contributed to the examination of potential DDIs. Cytochrome P450 (CYP) enzymes are responsible for the biotransformation of many drugs on the market, making them frequently implicated in drug metabolism and DDIs. Consequently, there has been a growing focus on the assessment of DDI risk for CYPs. This review article provides mechanistic insights underlying CYP inhibition/induction and an overview of the in vitro assessment of CYP-mediated DDIs.
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Affiliation(s)
- Jonghwa Lee
- Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; (J.L.B.); (R.M.G.)
| | | | | | - Klarissa D. Jackson
- Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; (J.L.B.); (R.M.G.)
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4
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Opitz CA, Holfelder P, Prentzell MT, Trump S. The complex biology of aryl hydrocarbon receptor activation in cancer and beyond. Biochem Pharmacol 2023; 216:115798. [PMID: 37696456 PMCID: PMC10570930 DOI: 10.1016/j.bcp.2023.115798] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/08/2023] [Accepted: 09/08/2023] [Indexed: 09/13/2023]
Abstract
The aryl hydrocarbon receptor (AHR) signaling pathway is a complex regulatory network that plays a critical role in various biological processes, including cellular metabolism, development, and immune responses. The complexity of AHR signaling arises from multiple factors, including the diverse ligands that activate the receptor, the expression level of AHR itself, and its interaction with the AHR nuclear translocator (ARNT). Additionally, the AHR crosstalks with the AHR repressor (AHRR) or other transcription factors and signaling pathways and it can also mediate non-genomic effects. Finally, posttranslational modifications of the AHR and its interaction partners, epigenetic regulation of AHR and its target genes, as well as AHR-mediated induction of enzymes that degrade AHR-activating ligands may contribute to the context-specificity of AHR activation. Understanding the complexity of AHR signaling is crucial for deciphering its physiological and pathological roles and developing therapeutic strategies targeting this pathway. Ongoing research continues to unravel the intricacies of AHR signaling, shedding light on the regulatory mechanisms controlling its diverse functions.
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Affiliation(s)
- Christiane A Opitz
- German Cancer Research Center (DKFZ), Heidelberg, Division of Metabolic Crosstalk in Cancer and the German Cancer Consortium (DKTK), DKFZ Core Center Heidelberg, 69120 Heidelberg, Germany; Neurology Clinic and National Center for Tumor Diseases, 69120 Heidelberg, Germany.
| | - Pauline Holfelder
- German Cancer Research Center (DKFZ), Heidelberg, Division of Metabolic Crosstalk in Cancer and the German Cancer Consortium (DKTK), DKFZ Core Center Heidelberg, 69120 Heidelberg, Germany; Faculty of Bioscience, Heidelberg University, 69120 Heidelberg, Germany
| | - Mirja Tamara Prentzell
- German Cancer Research Center (DKFZ), Heidelberg, Division of Metabolic Crosstalk in Cancer and the German Cancer Consortium (DKTK), DKFZ Core Center Heidelberg, 69120 Heidelberg, Germany; Faculty of Bioscience, Heidelberg University, 69120 Heidelberg, Germany
| | - Saskia Trump
- Molecular Epidemiology Unit, Berlin Institute of Health at Charité and the German Cancer Consortium (DKTK), Partner Site Berlin, a partnership between DKFZ and Charité -Universitätsmedizin Berlin, 10117 Berlin, Germany
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5
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Elson D, Nguyen BD, Bernales S, Chakravarty S, Jang HS, Korjeff NA, Zhang Y, Wilferd SF, Castro DJ, Plaisier CL, Finlay D, Oshima RG, Kolluri SK. Induction of Aryl Hydrocarbon Receptor-Mediated Cancer Cell-Selective Apoptosis in Triple-Negative Breast Cancer Cells by a High-Affinity Benzimidazoisoquinoline. ACS Pharmacol Transl Sci 2023; 6:1028-1042. [PMID: 37470014 PMCID: PMC10353065 DOI: 10.1021/acsptsci.2c00253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Indexed: 07/21/2023]
Abstract
Triple-negative breast cancer (TNBC) remains a disease with a paucity of targeted treatment opportunities. The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor that is involved in a wide range of physiological processes, including the sensing of xenobiotics, immune function, development, and differentiation. Different small-molecule AhR ligands drive strikingly varied cellular and organismal responses. In certain cancers, AhR activation by select small molecules induces cell cycle arrest or apoptosis via activation of tumor-suppressive transcriptional programs. AhR is expressed in triple-negative breast cancers, presenting a tractable therapeutic opportunity. Here, we identify a novel ligand of the aryl hydrocarbon receptor that potently and selectively induces cell death in triple-negative breast cancer cells and TNBC stem cells via the AhR. Importantly, we found that this compound, Analog 523, exhibits minimal cytotoxicity against multiple normal human primary cells. Analog 523 represents a high-affinity AhR ligand with potential for future clinical translation as an anticancer agent.
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Affiliation(s)
- Daniel
J. Elson
- Cancer
Research Laboratory, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon, 97331, United States
| | - Bach D. Nguyen
- Cancer
Research Laboratory, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon, 97331, United States
| | - Sebastian Bernales
- Praxis
Biotech, San Francisco, California, 94158, United States
- Centro Ciencia
& Vida, Avda. Del
Valle Norte 725, Santiago, 8580702, Chile
| | | | - Hyo Sang Jang
- Cancer
Research Laboratory, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon, 97331, United States
| | - Nicholas A. Korjeff
- Cancer
Research Laboratory, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon, 97331, United States
| | - Yi Zhang
- Cancer
Research Laboratory, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon, 97331, United States
| | - Sierra F. Wilferd
- School
of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona 85287, United States
| | - David J. Castro
- Sanford
Burnham Prebys Medical Discovery Institute, NCI Designated Cancer
Center, La Jolla, California, 92037, United States
- Oregon Health
& Science University, Portland, Oregon, 97239, United States
| | - Christopher L. Plaisier
- School
of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona 85287, United States
| | - Darren Finlay
- Sanford
Burnham Prebys Medical Discovery Institute, NCI Designated Cancer
Center, La Jolla, California, 92037, United States
| | - Robert G. Oshima
- Sanford
Burnham Prebys Medical Discovery Institute, NCI Designated Cancer
Center, La Jolla, California, 92037, United States
| | - Siva K. Kolluri
- Cancer
Research Laboratory, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon, 97331, United States
- Linus
Pauling Institute, Oregon State University, Corvallis, Oregon, 97331, United
States
- The
Pacific Northwest Center for Translational Environmental Health Research, Oregon State University, Corvallis, Oregon, 97331, United States
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6
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Hanieh H, Bani Ismail M, Alfwuaires MA, Ibrahim HIM, Farhan M. Aryl Hydrocarbon Receptor as an Anticancer Target: An Overview of Ten Years Odyssey. Molecules 2023; 28:molecules28103978. [PMID: 37241719 DOI: 10.3390/molecules28103978] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/22/2023] [Accepted: 05/06/2023] [Indexed: 05/28/2023] Open
Abstract
Aryl hydrocarbon receptor (AhR), a ligand-activated transcription factor belonging to the basic helix-loop-helix (bHLH)/per-Arnt-sim (PAS) superfamily, is traditionally known to mediate xenobiotic metabolism. It is activated by structurally diverse agonistic ligands and regulates complicated transcriptional processes through its canonical and non-canonical pathways in normal and malignant cells. Different classes of AhR ligands have been evaluated as anticancer agents in different cancer cells and exhibit efficiency, which has thrust AhR into the limelight as a promising molecular target. There is strong evidence demonstrating the anticancer potential of exogenous AhR agonists including synthetic, pharmaceutical, and natural compounds. In contrast, several reports have indicated inhibition of AhR activity by antagonistic ligands as a potential therapeutic strategy. Interestingly, similar AhR ligands exert variable anticancer or cancer-promoting potential in a cell- and tissue-specific mode of action. Recently, ligand-mediated modulation of AhR signaling pathways and the associated tumor microenvironment is emerging as a potential approach for developing cancer immunotherapeutic drugs. This article reviews advances of AhR in cancer research covering publication from 2012 to early 2023. It summarizes the therapeutic potential of various AhR ligands with an emphasis on exogenous ligands. It also sheds light on recent immunotherapeutic strategies involving AhR.
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Affiliation(s)
- Hamza Hanieh
- Basic Medical Sciences Department, Faculty of Medicine, Aqaba Medical Sciences University, Aqaba 77110, Jordan
- International Medical Research Center (iMReC), Aqaba 77110, Jordan
| | - Mohammad Bani Ismail
- Basic Medical Sciences Department, Faculty of Medicine, Aqaba Medical Sciences University, Aqaba 77110, Jordan
| | - Manal A Alfwuaires
- Department of Biological Sciences, College of Science, King Faisal University, Hofuf 31982, Saudi Arabia
| | - Hairul-Islam M Ibrahim
- Department of Biological Sciences, College of Science, King Faisal University, Hofuf 31982, Saudi Arabia
| | - Mahdi Farhan
- International Medical Research Center (iMReC), Aqaba 77110, Jordan
- Department of Drug Development, UniTechPharma, 1700 Fribourg, Switzerland
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7
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Elson DJ, Kolluri SK. Tumor-Suppressive Functions of the Aryl Hydrocarbon Receptor (AhR) and AhR as a Therapeutic Target in Cancer. BIOLOGY 2023; 12:biology12040526. [PMID: 37106727 PMCID: PMC10135996 DOI: 10.3390/biology12040526] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 03/25/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023]
Abstract
The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor involved in regulating a wide range of biological responses. A diverse array of xenobiotics and endogenous small molecules bind to the receptor and drive unique phenotypic responses. Due in part to its role in mediating toxic responses to environmental pollutants, AhR activation has not been traditionally viewed as a viable therapeutic approach. Nonetheless, the expression and activation of AhR can inhibit the proliferation, migration, and survival of cancer cells, and many clinically approved drugs transcriptionally activate AhR. Identification of novel select modulators of AhR-regulated transcription that promote tumor suppression is an active area of investigation. The development of AhR-targeted anticancer agents requires a thorough understanding of the molecular mechanisms driving tumor suppression. Here, we summarized the tumor-suppressive mechanisms regulated by AhR with an emphasis on the endogenous functions of the receptor in opposing carcinogenesis. In multiple different cancer models, the deletion of AhR promotes increased tumorigenesis, but a precise understanding of the molecular cues and the genetic targets of AhR involved in this process is lacking. The intent of this review was to synthesize the evidence supporting AhR-dependent tumor suppression and distill insights for development of AhR-targeted cancer therapeutics.
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Affiliation(s)
- Daniel J. Elson
- Cancer Research Laboratory, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR 97331, USA
| | - Siva K. Kolluri
- Cancer Research Laboratory, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR 97331, USA
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331, USA
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8
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The Role of the Aryl Hydrocarbon Receptor (AhR) and Its Ligands in Breast Cancer. Cancers (Basel) 2022; 14:cancers14225574. [PMID: 36428667 PMCID: PMC9688153 DOI: 10.3390/cancers14225574] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 10/27/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022] Open
Abstract
Breast cancer is a complex disease which is defined by numerous cellular and molecular markers that can be used to develop more targeted and successful therapies. The aryl hydrocarbon receptor (AhR) is overexpressed in many breast tumor sub-types, including estrogen receptor -positive (ER+) tumors; however, the prognostic value of the AhR for breast cancer patient survival is not consistent between studies. Moreover, the functional role of the AhR in various breast cancer cell lines is also variable and exhibits both tumor promoter- and tumor suppressor- like activity and the AhR is expressed in both ER-positive and ER-negative cells/tumors. There is strong evidence demonstrating inhibitory AhR-Rα crosstalk where various AhR ligands induce ER degradation. It has also been reported that different structural classes of AhR ligands, including halogenated aromatics, polynuclear aromatics, synthetic drugs and other pharmaceuticals, health promoting phytochemical-derived natural products and endogenous AhR-active compounds inhibit one or more of breast cancer cell proliferation, survival, migration/invasion, and metastasis. AhR-dependent mechanisms for the inhibition of breast cancer by AhR agonists are variable and include the downregulation of multiple genes/gene products such as CXCR4, MMPs, CXCL12, SOX4 and the modulation of microRNA levels. Some AhR ligands, such as aminoflavone, have been investigated in clinical trials for their anticancer activity against breast cancer. In contrast, several publications have reported that AhR agonists and antagonists enhance and inhibit mammary carcinogenesis, respectively, and differences between the anticancer activities of AhR agonists in breast cancer may be due in part to cell context and ligand structure. However, there are reports showing that the same AhR ligand in the same breast cancer cell line gives opposite results. These differences need to be resolved in order to further develop and take advantage of promising agents that inhibit mammary carcinogenesis by targeting the AhR.
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9
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Modulation of Aryl Hydrocarbon Receptor Expression Alleviated Neuropathic Pain in a Chronic Constriction Nerve Injury Animal Model. Int J Mol Sci 2022; 23:ijms231911255. [PMID: 36232555 PMCID: PMC9570158 DOI: 10.3390/ijms231911255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/17/2022] [Accepted: 09/19/2022] [Indexed: 12/02/2022] Open
Abstract
Neuropathic pain is well known to occur after damage to the somatosensory system. Aryl hydrocarbon receptor (AhR) has neuroprotective effects when the central nervous system is subjected to internal and external stimulations. However, the exact mechanism by which AhR regulates neuropathic pain is poorly understood. Nerve explant culture and the chronic constrictive nerve injury (CCI) model in wild or AhR-knockout mice were used in this study. In the nerve explant culture, the ovoid number increased in the AhR−/− condition and was decreased by omeprazole (AhR agonist) in a dose-dependent manner. Increased nerve degeneration and the associated inflammation response appeared in the AhR−/− condition, and these changes were attenuated by omeprazole. High expression of AhR in the injured nerve was noted after CCI. Deletion of AhR aggravated nerve damages and this was restored by omeprazole. Deletion of AhR increased NGF expression and reduced axon number in the paw skin, but this was attenuated by omeprazole. A highly expressed inflammation reaction over the dorsal spinal cord, somatosensory cortex, and hippocampus was noted in the AhR-deleted animals. Administration of omeprazole attenuated not only the inflammatory response, but also the amplitude of somatosensory evoked potential. Deletion of AhR further aggravated the neurobehavior compared with the wild type, but such behavior was attenuated by omeprazole. Chronic constrictive nerve injury augmented AhR expression of the injured nerve, and AhR deletion worsened the damage, while AhR agonist omeprazole counteracted such changes. AhR agonists could be potential candidates for neuropathic pain treatment.
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10
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Omeprazole suppresses aggressive cancer growth and metastasis in mice through promoting Snail degradation. Acta Pharmacol Sin 2022; 43:1816-1828. [PMID: 34785782 PMCID: PMC9253046 DOI: 10.1038/s41401-021-00787-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 09/26/2021] [Indexed: 11/09/2022] Open
Abstract
Omeprazole is a proton pump inhibitor that has recently been reported to exhibit anticancer activity against several types of cancer. However, the anticancer mechanisms of omeprazole remain elusive. Snail is an oncogenic zinc finger transcription factor; aberrant activation of Snail is associated with the occurrence and progression of cancer. In this study, we investigated whether Snail acted as a direct anticancer target of omeprazole. We showed that omeprazole displayed a high binding-affinity to recombinant Snail protein (Kd = 0.076 mM), suggesting that omeprazole directly and physically binds to the Snail protein. We further revealed that omeprazole disrupted CREB-binding protein (CBP)/p300-mediated Snail acetylation and then promoted Snail degradation through the ubiquitin-proteasome pathway in HCT116 cells. Omeprazole treatment markedly suppressed Snail-driven epithelial-mesenchymal transition (EMT) in aggressive HCT116, SUM159, and 4T1 cancer cells in vitro and reduced EMT-associated tumor invasion and metastasis in cancer cell xenograft models. Omeprazole also inhibited tumor growth by limiting Snail-dependent cell cycle progression. Overall, this study, for the first time, identifies Snail as a target of omeprazole and reveals a novel mechanism underlying the therapeutic effects of omeprazole against cancer. This study strongly suggests that omeprazole may be an excellent auxiliary drug for treating patients with malignant tumors.
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11
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Christopher Corton J, Mitchell CA, Auerbach S, Bushel JP, Ellinger-Ziegelbauer H, Escobar PA, Froetschl R, Harrill AH, Johnson K, Klaunig JE, Pandiri AR, Podtelezhnikov AA, Rager JE, Tanis KQ, van der Laan JW, Vespa A, Yauk CL, Pettit SD, Sistare FD. A Collaborative Initiative to Establish Genomic Biomarkers for Assessing Tumorigenic Potential to Reduce Reliance on Conventional Rodent Carcinogenicity Studies. Toxicol Sci 2022; 188:4-16. [PMID: 35404422 PMCID: PMC9238304 DOI: 10.1093/toxsci/kfac041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
There is growing recognition across broad sectors of the scientific community that use of genomic biomarkers has the potential to reduce the need for conventional rodent carcinogenicity studies of industrial chemicals, agrochemicals, and pharmaceuticals through a weight-of-evidence approach. These biomarkers fall into 2 major categories: (1) sets of gene transcripts that can identify distinct tumorigenic mechanisms of action; and (2) cancer driver gene mutations indicative of rapidly expanding growth-advantaged clonal cell populations. This call-to-action article describes a collaborative approach launched to develop and qualify biomarker gene expression panels that measure widely accepted molecular pathways linked to tumorigenesis and their activation levels to predict tumorigenic doses of chemicals from short-term exposures. Growing evidence suggests that application of such biomarker panels in short-term exposure rodent studies can identify both tumorigenic hazard and tumorigenic activation levels for chemical-induced carcinogenicity. In the future, this approach will be expanded to include methodologies examining mutations in key cancer driver gene mutation hotspots as biomarkers of both genotoxic and nongenotoxic chemical tumor risk. Analytical, technical, and biological validation studies of these complementary genomic tools are being undertaken by multisector and multidisciplinary collaborative teams within the Health and Environmental Sciences Institute. Success from these efforts will facilitate the transition from current heavy reliance on conventional 2-year rodent carcinogenicity studies to more rapid animal- and resource-sparing approaches for mechanism-based carcinogenicity evaluation supporting internal and regulatory decision-making.
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Affiliation(s)
- J Christopher Corton
- Center for Computational Toxicology and Exposure, US Environmental Protection Agency, Research Triangle Park, NC, USA
| | | | - Scott Auerbach
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - J Pierre Bushel
- Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, Durham, NC, USA
| | | | - Patricia A Escobar
- Safety Assessment and Laboratory Animal Resources, Merck Sharp & Dohme Corp, West Point, PA, USA
| | - Roland Froetschl
- BfArM-Bundesinstitut für Arzneimittel und Medizinprodukte, Federal Institute for Drugs and Medical Devices, Kurt-Georg-Kiesinger-Allee 3, Bonn, Germany
| | - Alison H Harrill
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | | | - James E Klaunig
- Laboratory of Investigative Toxicology and Pathology, Department of Environmental and Occupational Health, Indiana School of Public Health, Indiana University, Bloomington, IN, USA
| | - Arun R Pandiri
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | | | - Julia E Rager
- The Institute for Environmental Health Solutions, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Keith Q Tanis
- Safety Assessment and Laboratory Animal Resources, Merck Sharp & Dohme Corp, West Point, PA, USA
| | - Jan Willem van der Laan
- Section on Pharmacology, Toxicology and Kinetics, Medicines Evaluation Board, Utrecht, The Netherlands
| | - Alisa Vespa
- Therapeutic Products Directorate, Health Canada, Ottawa, Canada
| | - Carole L Yauk
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Syril D Pettit
- Health and Environmental Sciences Institute, Washington, DC, USA
| | - Frank D Sistare
- Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC, USA
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12
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Joshi AD, Thinakaran G, Elferink C. Cinnabarinic Acid-Induced Stanniocalcin 2 Confers Cytoprotection against Alcohol-Induced Liver Injury. J Pharmacol Exp Ther 2022; 381:1-11. [PMID: 35078862 PMCID: PMC8998678 DOI: 10.1124/jpet.121.000999] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 01/14/2022] [Indexed: 11/22/2022] Open
Abstract
We recently identified upregulation of a novel aryl hydrocarbon receptor (AhR) target gene, stanniocalcin 2 (STC2), by an endogenous AhR agonist, cinnabarinic acid (CA). STC2 is a disulfide-linked homodimeric secreted glycoprotein that plays a role in various physiologic processes, including cell metabolism, inflammation, endoplasmic reticulum (ER) and oxidative stress, calcium regulation, cell proliferation, and apoptosis. Our previous studies have confirmed that CA-induced AhR-dependent STC2 expression was able to confer cytoprotection both in vitro and in vivo in response to injury induced by variety of ER/oxidative insults. Here, we used mouse models of chronic and acute ethanol feeding and demonstrated that upregulation of STC2 by CA was critical for cytoprotection. In STC2 knockout mice (STC2-/-), CA failed to protect against both acute as well as chronic-plus-binge ethanol-induced liver injury, whereas re-expression of STC2 in the liver using in vivo gene delivery restored cytoprotection against injury based on measures of apoptosis and serum levels of liver enzymes, underlining STC2's indispensable function in cell survival. In conclusion, the identification of STC2 as an AhR target gene receptive to CA-mediated endogenous AhR signaling and STC2's role in providing cytoprotection against liver injury represents a key finding with potentially significant therapeutic implications. SIGNIFICANCE STATEMENT: We recently identified stanniocalcin 2 (STC2) as a novel aryl hydrocarbon receptor (AhR) target gene regulated by endogenous AhR agonist and tryptophan metabolite, cinnabarinic acid (CA). Here, we showed that CA-induced STC2 expression conferred cytoprotection against apoptosis, steatosis, and liver injury in chronic as well as acute models of ethanol feeding. Therefore, this study will prove instrumental in developing CA as a promising lead compound for future drug development against hepatic diseases.
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Affiliation(s)
- Aditya D Joshi
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma (A.D.J.); Byrd Alzheimer's Center and Research Institute and Department of Molecular Medicine, University of South Florida, Tampa, Florida (G.T.); and Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, Texas (C.E.)
| | - Gopal Thinakaran
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma (A.D.J.); Byrd Alzheimer's Center and Research Institute and Department of Molecular Medicine, University of South Florida, Tampa, Florida (G.T.); and Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, Texas (C.E.)
| | - Cornelis Elferink
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma (A.D.J.); Byrd Alzheimer's Center and Research Institute and Department of Molecular Medicine, University of South Florida, Tampa, Florida (G.T.); and Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, Texas (C.E.)
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13
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Hammond CL, Roztocil E, Gupta V, Feldon SE, Woeller CF. More than Meets the Eye: The Aryl Hydrocarbon Receptor is an Environmental Sensor, Physiological Regulator and a Therapeutic Target in Ocular Disease. FRONTIERS IN TOXICOLOGY 2022; 4:791082. [PMID: 35295218 PMCID: PMC8915869 DOI: 10.3389/ftox.2022.791082] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 02/08/2022] [Indexed: 12/22/2022] Open
Abstract
The aryl hydrocarbon receptor (AHR) is a ligand activated transcription factor originally identified as an environmental sensor of xenobiotic chemicals. However, studies have revealed that the AHR regulates crucial aspects of cell growth and metabolism, development and the immune system. The importance of the AHR and AHR signaling in eye development, toxicology and disease is now being uncovered. The AHR is expressed in many ocular tissues including the retina, choroid, cornea and the orbit. A significant role for the AHR in age-related macular degeneration (AMD), autoimmune uveitis, and other ocular diseases has been identified. Ligands for the AHR are structurally diverse organic molecules from exogenous and endogenous sources. Natural AHR ligands include metabolites of tryptophan and byproducts of the microbiome. Xenobiotic AHR ligands include persistent environmental pollutants such as dioxins, benzo (a) pyrene [B (a) P] and polychlorinated biphenyls (PCBs). Pharmaceutical agents including the proton pump inhibitors, esomeprazole and lansoprazole, and the immunosuppressive drug, leflunomide, activate the AHR. In this review, we highlight the role of the AHR in the eye and discuss how AHR signaling is involved in responding to endogenous and environmental stimuli. We also present the emerging concept that the AHR is a promising therapeutic target for eye disease.
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Affiliation(s)
| | | | | | | | - Collynn F. Woeller
- Flaum Eye Institute, Rochester, NY, United States
- Department of Environmental Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States
- *Correspondence: Collynn F. Woeller,
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14
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Hanieh H, Ibrahim HIM, Mohammed M, Alwassil OI, Abukhalil MH, Farhan M. Activation of aryl hydrocarbon receptor signaling by gallic acid suppresses progression of human breast cancer in vitro and in vivo. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 96:153817. [PMID: 34782204 DOI: 10.1016/j.phymed.2021.153817] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 10/11/2021] [Accepted: 10/17/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Despite the significant advances in diagnosis and treatment, breast cancer remains the most common malignancy and the second cause of death in women. Increasingly, preclinical evidence has suggested aryl hydrocarbon receptor (Ahr), a ligand activated transcription factor, a promising therapeutic target in breast cancer. PURPOSE This study aims at screening a number of phenolic compounds to identify an Ahr ligand with suppressive effects on human breast cancer. METHODS Potential interactions between Ahr and phenolic compounds were predicted in silico, and physical interaction was examined by ligand competitive binding in vitro. The MDA-MB-231 and T47D breast cancer cell lines were used to examine the expression of Ahr downstream genes and progression of breast cancer cells in vitro. Binding of Ahr/Ahr nuclear transporter (Arnt) complex to the xenobiotic-responsive element (XRE)-box was examined by DNA-protein interaction (DPI)-ELISA, promoter activity was assessed using luciferase reporter system, and RNA interreference was carried out using electroporation. The real-time PCR and/or immunoblotting were used to quantify gene expressions. Tumor growth in vivo was assessed using a murine orthotopic model. RESULTS A combined computational modeling and in vitro approaches identified gallic acid (GA) as an Ahr ligand with agonistic properties. It induced binding of Ahr/Arnt to the XRE-box, enhanced the promoter activity and expression of Ahr downstream genes including cytochrome P450 1A1 (CYP1A1), and SRY-related HMG-box4 (SOX4)-targeting miR-212/132 cluster and miR-335 in both MDA-MB-231 and T47D cells. GA increased apoptosis while decreased proliferation, migration and invasion capacities of breast cancer cells in an Ahr-dependent fashion. Furthermore, it reduced the levels of B-cell lymphoma 2 (BCL-2), cyclooxygenase-2 (COX-2) and SOX4, while selectively increased that of tumor protein 53 (P53), in an Ahr-dependent and -independent fashions. In an in vivo orthotopic model, GA activated Ahr signaling and reduced the growth of breast cancer cells. CONCLUSION We identified GA as an Ahr phenolic ligand, and provided evidence on the role of Ahr in mediating its anti-breast cancer effects, indicating that GA, and possibly other phenolic compounds, have important therapeutic implications in human breast cancer through activation of Ahr signaling.
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Affiliation(s)
- Hamza Hanieh
- Department of Medical Analysis, Department of Biological Sciences, Al-Hussein Bin Talal University, Ma'an 71111, Jordan; International Medical Research Center (iMReC), Aqaba 77110, Jordan.
| | - Hairul-Islam M Ibrahim
- Biological Sciences Department, College of Science, King Faisal University, Hofuf 31982, Saudi Arabia
| | - Maged Mohammed
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Hofuf 31982, Saudi Arabia; Department of Pharmacognosy, College of Pharmacy, Zagazig University, Zagazig 44111, Egypt
| | - Osama I Alwassil
- Department of Pharmaceutical Sciences, College of Pharmacy, King Saud bin Abdulaziz University for Health Sciences, Riyadh 11451, Saudi Arabia
| | - Mohammad H Abukhalil
- Department of Medical Analysis, Department of Biological Sciences, Al-Hussein Bin Talal University, Ma'an 71111, Jordan; International Medical Research Center (iMReC), Aqaba 77110, Jordan
| | - Mahdi Farhan
- International Medical Research Center (iMReC), Aqaba 77110, Jordan; Department of Drug Development, UniTechPharma, Fribourg 1700, Switzerland
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15
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Bai Y, Zhu P, Zhou K, Zhang SG. Effect of the acid suppressor omeprazole on the proliferation, migration, invasion and cell cycle of esophageal squamous cell carcinoma cells via the aryl hydrocarbon receptor pathway. Exp Ther Med 2021; 22:1187. [PMID: 34475977 PMCID: PMC8406681 DOI: 10.3892/etm.2021.10621] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 07/14/2021] [Indexed: 12/11/2022] Open
Abstract
Esophageal cancer is a malignant tumor type with one of the highest mortality rates worldwide. The aryl hydrocarbon receptor (AHR), which has been investigated in recent years, has been confirmed to be associated with the occurrence and development of esophageal cancer. AHR has a variety of different ligands, which regulate its activity following binding. The widely known acid inhibitor omeprazole (OME) also affects AHR and its downstream proteins (such as the cytochrome P450 family) by non-ligand binding; however, the mechanisms have remained to be fully elucidated. Therefore, the aim of the present study was to investigate the role of OME in esophageal squamous cell carcinoma (ESCC), whether the mechanism proceeds via the AHR pathway and how OME regulates AHR to affect the occurrence and development of esophageal carcinoma. The AHR-selective regulator OME was used to treat the ESCC cell lines TE1 and KYSE150. Western blot analysis was used to verify the effect of OME on AHR and proliferating cell nuclear antigen (PCNA) protein expression levels, while Cell Counting Kit (CCK)-8, wound-healing and Transwell assays were used to determine the proliferation, migration and invasion of the ESCCs, respectively, following treatment with OME. In addition, flow cytometry was used to investigate the cell cycle distribution of the ESCCs following incubation with OME. AHR was highly expressed in the ESCCs and following treatment with OME, the protein expression levels of AHR and PCNA were downregulated. The CCK-8 assay indicated that the proliferation of the ESCCs was also reduced following treatment with OME. Furthermore, flow cytometry revealed a notable block of the cells in G1/G0 phase, while the results of the wound-healing and Transwell assays respectively suggested that cell migration and invasion were reduced. In conclusion, OME inhibited the proliferation, migration and invasion of ESCC cells and blocked the cell cycle via the AHR pathway, which may provide a therapeutic effect on esophageal squamous cell cancer.
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Affiliation(s)
- Yu Bai
- Department of Thoracic Surgery, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Peiyao Zhu
- Department of Thoracic Surgery, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Kun Zhou
- Department of Thoracic Surgery, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Shu-Guang Zhang
- Department of Thoracic Surgery, The First Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
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16
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Andreeva-Gateva P, Bakalov D, Sabit Z, Tafradjiiska-Hadjiolova R. Aryl hydrocarbon receptors as potential therapeutic targets. PHARMACIA 2020. [DOI: 10.3897/pharmacia.67.e47298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Aryl hydrocarbon receptors (AhR) are regulators of the expression of cytochrome P-450 isoforms, mediating a wide variety of the effects of substances from the endogenous or exogenous origin, including those produced from the microbiome. An exciting new aspect of their activity is their localization in the brain and their potential to modulate the action of the immune system. AhR is emerging as an essential toxicological and therapeutic target for neuromodulation. Further studies are needed for elucidating their utility as drug-targets.
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17
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Aryl Hydrocarbon Receptor (AHR) Ligands as Selective AHR Modulators (SAhRMs). Int J Mol Sci 2020; 21:ijms21186654. [PMID: 32932962 PMCID: PMC7555580 DOI: 10.3390/ijms21186654] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/01/2020] [Accepted: 09/09/2020] [Indexed: 02/06/2023] Open
Abstract
The aryl hydrocarbon receptor (AhR) was first identified as the intracellular protein that bound and mediated the toxic effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD, dioxin) and dioxin-like compounds (DLCs). Subsequent studies show that the AhR plays an important role in maintaining cellular homeostasis and in pathophysiology, and there is increasing evidence that the AhR is an important drug target. The AhR binds structurally diverse compounds, including pharmaceuticals, phytochemicals and endogenous biochemicals, some of which may serve as endogenous ligands. Classification of DLCs and non-DLCs based on their persistence (metabolism), toxicities, binding to wild-type/mutant AhR and structural similarities have been reported. This review provides data suggesting that ligands for the AhR are selective AhR modulators (SAhRMs) that exhibit tissue/cell-specific AhR agonist and antagonist activities, and that their functional diversity is similar to selective receptor modulators that target steroid hormone and other nuclear receptors.
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18
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Piwarski SA, Thompson C, Chaudhry AR, Denvir J, Primerano DA, Fan J, Salisbury TB. The putative endogenous AHR ligand ITE reduces JAG1 and associated NOTCH1 signaling in triple negative breast cancer cells. Biochem Pharmacol 2020; 174:113845. [PMID: 32032581 DOI: 10.1016/j.bcp.2020.113845] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 02/03/2020] [Indexed: 12/21/2022]
Abstract
The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor. Triple negative breast cancer (TNBC) is the most aggressive breast cancer subtype. TNBC expresses AHR and AHR ligands have anti-cancer activity in TNBC. The aggressiveness of TNBC is due in part to JAG1-NOTCH1 signaling. ITE is a putative endogenous AHR ligand. We show that ITE reduces the expression of JAG1 the amount of Notch 1 intracellular domain (NICD1) and the phosphorylation of STAT3 (at tyrosine 705) in TNBC MDA-MB-231 cells. The STAT3 inhibitor STATTIC also reduced JAG1. STAT3, thus, mediates regulation of JAG1 in MDA-MB-231 cells. Reducing the expression of JAG1 with short interfering RNA decreases the growth, migration and invasiveness of MDA-MB-231 cells. JAG1, therefore, has cellular effects in MDA-MB-231 cells under basal conditions. We consequently evaluated if exposing cells to greater amounts of JAG1 would counteract ITE cellular effects in MDA-MB-231 cells. The results show that JAG1 does not counteract the cellular effects of ITE. JAG1, thus, has no effect on growth or invasiveness in MDA-MB-231 cells treated with ITE. JAG1, therefore, has context dependent roles in MDA-MB-231 cells (basal versus ITE treatment). The results also show that other pathways, not inhibition of the JAG1-NOTCH1 pathway, are important for mediating the growth and invasive inhibitory effect of ITE on MDA-MB-231 cells.
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Affiliation(s)
- Sean A Piwarski
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1 John Marshall Drive, Huntington, WV 25755, USA.
| | - Chelsea Thompson
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1 John Marshall Drive, Huntington, WV 25755, USA.
| | - Ateeq R Chaudhry
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1 John Marshall Drive, Huntington, WV 25755, USA.
| | - James Denvir
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1 John Marshall Drive, Huntington, WV 25755, USA.
| | - Donald A Primerano
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1 John Marshall Drive, Huntington, WV 25755, USA.
| | - Jun Fan
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1 John Marshall Drive, Huntington, WV 25755, USA.
| | - Travis B Salisbury
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine, Marshall University, 1 John Marshall Drive, Huntington, WV 25755, USA.
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19
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Hawerkamp HC, Kislat A, Gerber PA, Pollet M, Rolfes KM, Soshilov AA, Denison MS, Momin AA, Arold ST, Datsi A, Braun SA, Oláh P, Lacouture ME, Krutmann J, Haarmann‐Stemmann T, Homey B, Meller S. Vemurafenib acts as an aryl hydrocarbon receptor antagonist: Implications for inflammatory cutaneous adverse events. Allergy 2019; 74:2437-2448. [PMID: 31269229 DOI: 10.1111/all.13972] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 05/02/2019] [Accepted: 05/21/2019] [Indexed: 12/16/2022]
Abstract
BACKGROUND In recent years, the BRAF inhibitor vemurafenib has been successfully established in the therapy of advanced melanoma. Despite its superior efficacy, the use of vemurafenib is limited by frequent inflammatory cutaneous adverse events that affect patients' quality of life and may lead to dose reduction or even cessation of anti-tumor therapy. To date, the molecular and cellular mechanisms of vemurafenib-induced rashes have remained largely elusive. METHODS In this study, we deployed immunohistochemistry, RT-qPCR, flow cytometry, lymphocyte activation tests, and different cell-free protein-interaction assays. RESULTS We here demonstrate that vemurafenib inhibits the downstream signaling of the canonical pathway of aryl hydrocarbon receptor (AhR) in vitro, thereby inducing the expression of proinflammatory cytokines (eg, TNF) and chemokines (eg, CCL5). In line with these results, we observed an impaired expression of AhR-regulated genes (eg, CYP1A1) and an upregulation of the corresponding proinflammatory genes in vivo. Moreover, results of lymphocyte activation tests showed the absence of drug-specific T cells in respective patients. CONCLUSION Taken together, we obtained no hint of an underlying sensitization against vemurafenib but found evidence suggesting that vemurafenib enhances proinflammatory responses by inhibition of canonical AhR signaling. Our findings contribute to our understanding of the central role of the AhR in skin inflammation and may point toward a potential role for topical AhR agonists in supportive cancer care.
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Affiliation(s)
- Heike C. Hawerkamp
- Department of Dermatology, Medical Faculty Heinrich‐Heine‐University Duesseldorf Germany
| | - Andreas Kislat
- Department of Dermatology, Medical Faculty Heinrich‐Heine‐University Duesseldorf Germany
| | - Peter A. Gerber
- Department of Dermatology, Medical Faculty Heinrich‐Heine‐University Duesseldorf Germany
| | - Marius Pollet
- Leibniz‐Research Institute for Environmental Medicine Duesseldorf Germany
| | | | - Anatoly A. Soshilov
- Department of Environmental Toxicology University of California Davis CA USA
| | - Michael S. Denison
- Department of Environmental Toxicology University of California Davis CA USA
| | - Afaque A. Momin
- King Abdullah University of Science and Technology (KAUST) Computational Bioscience Research Center (CBRC), Division of Biological and Environmental Sciences and Engineering (BESE) Thuwal Saudi Arabia
| | - Stefan T. Arold
- King Abdullah University of Science and Technology (KAUST) Computational Bioscience Research Center (CBRC), Division of Biological and Environmental Sciences and Engineering (BESE) Thuwal Saudi Arabia
| | - Angeliki Datsi
- Department of Dermatology, Medical Faculty Heinrich‐Heine‐University Duesseldorf Germany
| | - Stephan A. Braun
- Department of Dermatology, Medical Faculty Heinrich‐Heine‐University Duesseldorf Germany
| | - Péter Oláh
- Department of Dermatology, Medical Faculty Heinrich‐Heine‐University Duesseldorf Germany
- Department of Dermatology, Venereology and Oncodermatology University of Pécs Pécs Hungary
| | - Mario E. Lacouture
- Dermatology Service, Department of Medicine Memorial Sloan‐Kettering Cancer Center New York NY USA
| | - Jean Krutmann
- Leibniz‐Research Institute for Environmental Medicine Duesseldorf Germany
| | | | - Bernhard Homey
- Department of Dermatology, Medical Faculty Heinrich‐Heine‐University Duesseldorf Germany
| | - Stephan Meller
- Department of Dermatology, Medical Faculty Heinrich‐Heine‐University Duesseldorf Germany
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20
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Baker JR, Sakoff JA, McCluskey A. The aryl hydrocarbon receptor (AhR) as a breast cancer drug target. Med Res Rev 2019; 40:972-1001. [PMID: 31721255 DOI: 10.1002/med.21645] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/04/2019] [Accepted: 10/29/2019] [Indexed: 12/25/2022]
Abstract
Breast cancer is the most common cancer in women, with more than 1.7 million diagnoses worldwide per annum. Metastatic breast cancer remains incurable, and the presence of triple-negative phenotypes makes targeted treatment impossible. The aryl hydrocarbon receptor (AhR), most commonly associated with the metabolism of xenobiotic ligands, has emerged as a promising biological target for the treatment of this deadly disease. Ligands for the AhR can be classed as exogenous or endogenous and may have agonistic or antagonistic activity. It has been well reported that agonistic ligands may have potent and selective growth inhibition activity in a number of oncogenic cell lines, and one (aminoflavone) has progressed to phase I clinical trials for breast cancer sufferers. In this study, we examine the current state of the literature in this area and elucidate the promising advances that are being made in hijacking the cytosolic-to-nuclear pathway of the AhR for the possible future treatment of breast cancer.
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Affiliation(s)
- Jennifer R Baker
- Chemistry, School of Environmental & Life Sciences, the University of Newcastle, Callaghan, NSW, Australia
| | - Jennette A Sakoff
- Department of Medical Oncology, Calvary Mater Newcastle Hospital, Waratah, NSW, Australia
| | - Adam McCluskey
- Chemistry, School of Environmental & Life Sciences, the University of Newcastle, Callaghan, NSW, Australia
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21
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Ristic B, Sikder MOF, Bhutia YD, Ganapathy V. Pharmacologic inducers of the uric acid exporter ABCG2 as potential drugs for treatment of gouty arthritis. Asian J Pharm Sci 2019; 15:173-180. [PMID: 32373197 PMCID: PMC7193448 DOI: 10.1016/j.ajps.2019.10.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 10/12/2019] [Accepted: 10/17/2019] [Indexed: 12/11/2022] Open
Abstract
Uric acid is the end product of purine catabolism and its plasma levels are maintained below its maximum solubility in water (6–7 mg/dl). The plasma levels are tightly regulated as the balance between the rate of production and the rate of excretion, the latter occurring in urine (kidney), bile (liver) and feces (intestinal tract). Reabsorption in kidney is also an important component of this process. Both excretion and reabsorption are mediated by specific transporters. Disruption of the balance between production and excretion leads to hyperuricemia, which increases the risk of uric acid crystallization as monosodium urate with subsequent deposition of the crystals in joints causing gouty arthritis. Loss-of-function mutations in the transporters that mediate uric acid excretion are associated with gout. The ATP-Binding Cassette exporter ABCG2 is important in uric acid excretion at all three sites: kidney (urine), liver (bile), and intestine (feces). Mutations in this transporter cause gout and these mutations occur at significant prevalence in general population. However, mutations that are most prevalent result only in partial loss of transport function. Therefore, if the expression of these partially defective transporters could be induced, the increased number of the transporter molecules would compensate for the mutation-associated decrease in transport function and hence increase uric acid excretion. As such, pharmacologic agents with ability to induce the expression of ABCG2 represent potentially a novel class of drugs for treatment of gouty arthritis.
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Affiliation(s)
| | | | | | - Vadivel Ganapathy
- Corresponding author. Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, United States. Tel.: +1 806 743 2518.
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22
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Dolciami D, Ballarotto M, Gargaro M, López-Cara LC, Fallarino F, Macchiarulo A. Targeting Aryl hydrocarbon receptor for next-generation immunotherapies: Selective modulators (SAhRMs) versus rapidly metabolized ligands (RMAhRLs). Eur J Med Chem 2019; 185:111842. [PMID: 31727470 DOI: 10.1016/j.ejmech.2019.111842] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 10/30/2019] [Accepted: 10/30/2019] [Indexed: 12/12/2022]
Abstract
Aryl Hydrocarbon Receptor (AhR) constitutes a major network hub of genomic and non-genomic signaling pathways, connecting host's immune cells to environmental factors. It shapes innate and adaptive immune processes to environmental stimuli with species-, cell- and tissue-type dependent specificity. Although an ever increasing number of studies has thrust AhR into the limelight as attractive target for the development of next-generation immunotherapies, concerns exist on potential safety issues associated with small molecule modulation of the receptor. Selective AhR modulators (SAhRMs) and rapidly metabolized AhR ligands (RMAhRLs) are two classes of receptor agonists that are emerging as interesting lead compounds to bypass AhR-related toxicity in favor of therapeutic effects. In this article, we discuss SAhRMs and RMAhRLs reported in literature, covering concepts underlying their definitions, specific binding modes, structure-activity relationships and AhR-mediated functions.
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Affiliation(s)
- Daniela Dolciami
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo, 1, 06123, Perugia, Italy
| | - Marco Ballarotto
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo, 1, 06123, Perugia, Italy
| | - Marco Gargaro
- Department of Experimental Medicine, University of Perugia, Piazz.le Gambuli, 1, 06132, Perugia, Italy
| | - Luisa Carlota López-Cara
- Department of Pharmaceutical & Organic Chemistry, Faculty of Pharmacy, University of Granada, 18010, Granada, Spain
| | - Francesca Fallarino
- Department of Experimental Medicine, University of Perugia, Piazz.le Gambuli, 1, 06132, Perugia, Italy
| | - Antonio Macchiarulo
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo, 1, 06123, Perugia, Italy.
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Hammond CL, Roztocil E, Phipps RP, Feldon SE, Woeller CF. Proton pump inhibitors attenuate myofibroblast formation associated with thyroid eye disease through the aryl hydrocarbon receptor. PLoS One 2019; 14:e0222779. [PMID: 31536596 PMCID: PMC6752849 DOI: 10.1371/journal.pone.0222779] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 09/06/2019] [Indexed: 12/15/2022] Open
Abstract
Thyroid eye disease (TED) can lead to scar formation and tissue remodeling in the orbital space. In severe cases, the scarring process leads to sight-threatening pathophysiology. There is no known effective way to prevent scar formation in TED patients, or to reverse scarring once it occurs. In this study, we show that the proton pump inhibitors (PPIs), esomeprazole and lansoprazole, can prevent transforming growth factor beta (TGFβ)-mediated differentiation of TED orbital fibroblasts to myofibroblasts, a critical step in scar formation. Both PPIs prevent TGFβ-induced increases in alpha-smooth muscle actin (αSMA), calponin, and collagen production and reduce TED orbital fibroblast cell proliferation and migration. Esomeprazole and lansoprazole exert these effects through an aryl hydrocarbon receptor (AHR)-dependent pathway that includes reducing β-catenin/Wnt signaling. We conclude that PPIs are potentially useful therapies for preventing or treating TED by reducing the myofibroblast accumulation that occurs in the disease.
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Affiliation(s)
- Christine L. Hammond
- Flaum Eye Institute, School of Medicine and Dentistry, University of Rochester, Rochester, New York, United States of America
| | - Elisa Roztocil
- Flaum Eye Institute, School of Medicine and Dentistry, University of Rochester, Rochester, New York, United States of America
| | - Richard P. Phipps
- Department of Environmental Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, New York, United States of America
| | - Steven E. Feldon
- Flaum Eye Institute, School of Medicine and Dentistry, University of Rochester, Rochester, New York, United States of America
| | - Collynn F. Woeller
- Flaum Eye Institute, School of Medicine and Dentistry, University of Rochester, Rochester, New York, United States of America
- Department of Environmental Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, New York, United States of America
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Muku GE, Murray IA, Perdew GH. Activation of the Ah Receptor Modulates Gastrointestinal Homeostasis and the Intestinal Microbiome. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/s40495-019-00197-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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25
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Jin UH, Karki K, Kim SB, Safe S. Inhibition of pancreatic cancer Panc1 cell migration by omeprazole is dependent on aryl hydrocarbon receptor activation of JNK. Biochem Biophys Res Commun 2019; 501:751-757. [PMID: 29758193 DOI: 10.1016/j.bbrc.2018.05.061] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 05/03/2018] [Accepted: 05/10/2018] [Indexed: 12/14/2022]
Abstract
Several aryl hydrocarbon receptor (AhR)-active pharmaceuticals were screened as inhibitors of pancreatic cancer cell invasion and identified two compounds, omeprazole, that inhibited invasion. Inhibition of highly invasive Panc1 cell invasion by omeprazole involves an AhR-dependent non-genomic pathway, and omeprazole-mediated inhibition of Panc1 cell invasion was dependent on Jun-N-terminal kinase (JNK) and mitogen-activated kinase kinase 7 (MKK7). The failure of omeprazole to induce nuclear translocation of the AhR was not due to overexpression of cytosolic AhR partner proteins Hsp90 or XAP2, and results of DNA sequencing show that the AhR expressed in Panc1 cells was not mutated. Results of RNAseq studies indicate that omeprazole induced an AhR-dependent downregulation of several pro-invasion factors including activated leukocyte cell adhesion molecule (ALCAM), long chain fatty acid CoA-synthase (CSL4), stathmin 3 (STMN3) and neuropillin 2 (NRP2), and the specific functions of these genes are currently being investigated.
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Affiliation(s)
- Un-Ho Jin
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX 77843, USA
| | - Keshav Karki
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX 77843, USA
| | - Sang-Bae Kim
- Human Genomic Sequencing Center, Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Stephen Safe
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX 77843, USA.
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Rowland LK, Campbell PS, Mavingire N, Wooten JV, McLean L, Zylstra D, Thorne G, Daly D, Boyle K, Whang S, Unternaehrer J, Brantley EJ. Putative tumor suppressor cytoglobin promotes aryl hydrocarbon receptor ligand-mediated triple negative breast cancer cell death. J Cell Biochem 2019; 120:6004-6014. [PMID: 30450577 PMCID: PMC6382570 DOI: 10.1002/jcb.27887] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 09/21/2018] [Indexed: 12/17/2022]
Abstract
Nearly 40 000 women die annually from breast cancer in the United States. Clinically available targeted breast cancer therapy is largely ineffective in triple negative breast cancer (TNBC), characterized by tumors that lack expression of the estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (Her2). TNBC is associated with a poor prognosis. Previous reports show that aryl hydrocarbon receptor (AhR) partial agonist 2-(4-amino-3-methylphenyl)-5-fluorobenzothiazole (5F 203) selectively inhibits the growth of breast cancer cells, including those of the TNBC subtype. We previously demonstrated that 5F 203 induced the expression of putative tumor suppressor gene cytoglobin (CYGB) in breast cancer cells. In the current study, we determined that 5F 203 induces apoptosis and caspase-3 activation in MDA-MB-468 TNBC cells and in T47D ER+ PR + Her2 - breast cancer cells. We also show that caspases and CYGB promote 5F 203-mediated apoptosis in MDA-MB-468 cells. 5F 203 induced lysosomal membrane permeabilization (LMP) and cathepsin B release in MDA-MB-468 and T47D cells. In addition, silencing CYGB attenuated the ability of 5F 203 to induce caspase-3/-7 activation, proapoptotic gene expression, LMP, and cathepsin B release in MDA-MB-468 cells. Moreover, 5F 203 induced CYGB protein expression, proapoptotic protein expression, and caspase-3 cleavage in MDA-MB-468 cells and in MDA-MB-468 xenograft tumors grown orthotopically in athymic mice. These data provide a basis for the development of AhR ligands with the potential to restore CYGB expression as a novel strategy to treat TNBC.
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Affiliation(s)
- Leah K. Rowland
- Department of Basic Sciences, Center for Health Disparities and Molecular Medicine, Loma Linda University Health School of Medicine, Loma Linda, CA
| | - Petreena S. Campbell
- Department of Basic Sciences, Center for Health Disparities and Molecular Medicine, Loma Linda University Health School of Medicine, Loma Linda, CA
| | - Nicole Mavingire
- Department of Basic Sciences, Center for Health Disparities and Molecular Medicine, Loma Linda University Health School of Medicine, Loma Linda, CA
| | - Jonathan V. Wooten
- Department of Basic Sciences, Center for Health Disparities and Molecular Medicine, Loma Linda University Health School of Medicine, Loma Linda, CA
| | - Lancelot McLean
- Dental Education Services, Loma Linda University Health School of Dentistry, Loma Linda, CA
| | - Dain Zylstra
- Department of Pharmaceutical and Administrative Sciences, Loma Linda University Health School of Pharmacy, Loma Linda, CA
| | - Gabriell Thorne
- Department of Basic Sciences, Center for Health Disparities and Molecular Medicine, Loma Linda University Health School of Medicine, Loma Linda, CA
- Department of Pharmacy and Health Professions, Elizabeth City State University, Elizabeth City, NC, USA
| | - Devin Daly
- Department of Basic Sciences, Center for Health Disparities and Molecular Medicine, Loma Linda University Health School of Medicine, Loma Linda, CA
| | - Kristopher Boyle
- Department of Pharmaceutical and Administrative Sciences, Loma Linda University Health School of Pharmacy, Loma Linda, CA
| | - Sonya Whang
- Department of Basic Sciences, Center for Health Disparities and Molecular Medicine, Loma Linda University Health School of Medicine, Loma Linda, CA
| | - Juli Unternaehrer
- Department of Basic Sciences, Center for Health Disparities and Molecular Medicine, Loma Linda University Health School of Medicine, Loma Linda, CA
| | - Eileen J. Brantley
- Department of Basic Sciences, Center for Health Disparities and Molecular Medicine, Loma Linda University Health School of Medicine, Loma Linda, CA
- Department of Pharmaceutical and Administrative Sciences, Loma Linda University Health School of Pharmacy, Loma Linda, CA
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27
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Tarnow P, Tralau T, Luch A. Chemical activation of estrogen and aryl hydrocarbon receptor signaling pathways and their interaction in toxicology and metabolism. Expert Opin Drug Metab Toxicol 2019; 15:219-229. [PMID: 30644759 DOI: 10.1080/17425255.2019.1569627] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Estrogen receptors (ERs) and the arylhydrocarbon receptor (AHR) are ligand-activated transcription factors that regulate the expression of genes involved in many physiological processes. With both receptors binding a broad range of natural and anthropogenic ligands, they are molecular targets for many substances, raising concerns for possible health effects. Areas covered: This review shall give a brief overview on the physiological functions of both receptors including their underlying molecular mechanisms. It summarizes the interaction of the respective signaling pathways including impacts on metabolism of endogenous estrogens, transcriptional interference, inhibitory crosstalk, and proteasomal degradation. Also addressed are the AHR dependent formation of estrogenic metabolites from polycyclic aromatic hydrocarbons and the possible impact of the ER/AHR crosstalk in the context of drug metabolism. Expert opinion: Despite decade-long research, the physiological role of the AHR and ER as well as the implications of their complex mutual crosstalk remain to be determined as do resulting potential impacts on human health. With more and more endogenous AHR ligands being discovered, future research should hence systematically address the potential impact of such substances on estrogen signaling. The intimate link between these two pathways and the genes regulated therein bears the potential for impacts on drug metabolism and human health.
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Affiliation(s)
- Patrick Tarnow
- a Department of Chemical & Product Safety , German Federal Institute for Risk Assessment (BfR) , Berlin , Germany
| | - Tewes Tralau
- a Department of Chemical & Product Safety , German Federal Institute for Risk Assessment (BfR) , Berlin , Germany
| | - Andreas Luch
- a Department of Chemical & Product Safety , German Federal Institute for Risk Assessment (BfR) , Berlin , Germany
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28
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Akishina AA, Vorontsova JE, Cherezov RO, Slezinger MS, Simonova OB, Kuzin BA. NAP Family CG5017 Chaperone Pleiotropically Regulates Human AHR Target Genes Expression in Drosophila Testis. Int J Mol Sci 2018; 20:ijms20010118. [PMID: 30597983 PMCID: PMC6337364 DOI: 10.3390/ijms20010118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 12/11/2018] [Accepted: 12/13/2018] [Indexed: 12/13/2022] Open
Abstract
To study the regulatory mechanism of the Aryl hydrocarbon receptor (AHR), target genes of transcription are necessary for understanding the normal developmental and pathological processes. Here, we examined the effects of human AHR ligands on male fecundity. To induce ectopic human AhR gene expression, we used Drosophilamelanogaster transformed with human AhR under the control of a yeast UAS promoter element capable of activation in the two-component UAS-GAL4 system. We found that exogenous AHR ligands decrease the number of Drosophila gonadal Tj-positive cells. We also found both an increase and decrease of AHR target gene expression, including in genes that control homeostasis and testis development. This suggests that gonadal AHR activation may affect the expression of gene networks that control sperm production and could be critical for fertility not just in Drosophila but also in humans. Finally, we found that the activation of the expression for some AHR target genes depends on the expression of testis-specific chaperone CG5017 in gonadal cells. Since CG5017 belongs to the nucleosome assembly protein (NAP) family and may participate in epigenetic regulation, we propose that this nucleotropic chaperone is essential to provide the human AHR with access to only the defined set of its target genes during spermatogenesis.
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Affiliation(s)
- Angelina A Akishina
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Vavilova str. 26, Moscow 119991, Russia.
| | - Julia E Vorontsova
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Vavilova str. 26, Moscow 119991, Russia.
| | - Roman O Cherezov
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Vavilova str. 26, Moscow 119991, Russia.
| | - Mikhail S Slezinger
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Vavilova str. 26, Moscow 119991, Russia.
| | - Olga B Simonova
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Vavilova str. 26, Moscow 119991, Russia.
| | - Boris A Kuzin
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Vavilova str. 26, Moscow 119991, Russia.
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Ohashi H, Nishioka K, Nakajima S, Kim S, Suzuki R, Aizaki H, Fukasawa M, Kamisuki S, Sugawara F, Ohtani N, Muramatsu M, Wakita T, Watashi K. The aryl hydrocarbon receptor-cytochrome P450 1A1 pathway controls lipid accumulation and enhances the permissiveness for hepatitis C virus assembly. J Biol Chem 2018; 293:19559-19571. [PMID: 30381393 DOI: 10.1074/jbc.ra118.005033] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 10/24/2018] [Indexed: 12/12/2022] Open
Abstract
Viruses hijack and modify host cell functions to maximize viral proliferation. Hepatitis C virus (HCV) reorganizes host cell metabolism to produce specialized membrane structures and to modify organelles such as double-membrane vesicles and enlarged lipid droplets (LDs), thereby enabling virus replication and assembly. However, the molecular bases of these host-HCV interactions are largely unknown. Here, using a chemical screen, we demonstrate that the benzamide derivative flutamide reduces the host capacity to produce infectious HCV. Flutamide disrupted the formation of enlarged LDs in HCV-infected cells, thereby abolishing HCV assembly. We also report that aryl hydrocarbon receptor (AhR), a known flutamide target, plays a key role in mediating LD accumulation and HCV production. This AhR function in lipid production was also observed in HCV-uninfected Huh-7 cells and primary human hepatocytes, suggesting that AhR signaling regulates lipid accumulation independently of HCV infection. We further observed that a downstream activity, that of cytochrome P450 1A1 (CYP1A1), was the primary regulator of AhR-mediated lipid production. Specifically, blockade of AhR-induced CYP1A1 up-regulation counteracted LD overproduction, and overproduction of CYP1A1, but not of CYP1B1, in AhR-inactivated cells restored lipid accumulation. Of note, HCV infection up-regulated the AhR-CYP1A1 pathway, resulting in the accumulation of enlarged LDs. In conclusion, we demonstrate that the AhR-CYP1A1 pathway has a significant role in lipid accumulation, a hallmark of HCV infection that maximizes progeny virus production. Our chemical-genetic analysis reveals a new strategy and lead compounds to control hepatic lipid accumulation as well as HCV infection.
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Affiliation(s)
- Hirofumi Ohashi
- From the Department of Virology II and.,the Tokyo University of Science Graduate School of Science and Technology, Noda 278-8510, Japan, and
| | - Kazane Nishioka
- From the Department of Virology II and.,the Tokyo University of Science Graduate School of Science and Technology, Noda 278-8510, Japan, and
| | - Syo Nakajima
- From the Department of Virology II and.,the Tokyo University of Science Graduate School of Science and Technology, Noda 278-8510, Japan, and
| | - Sulyi Kim
- From the Department of Virology II and
| | | | | | - Masayoshi Fukasawa
- the Department of Biochemistry and Cell Biology, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Shinji Kamisuki
- the Tokyo University of Science Graduate School of Science and Technology, Noda 278-8510, Japan, and
| | - Fumio Sugawara
- the Tokyo University of Science Graduate School of Science and Technology, Noda 278-8510, Japan, and
| | - Naoko Ohtani
- the Tokyo University of Science Graduate School of Science and Technology, Noda 278-8510, Japan, and
| | | | | | - Koichi Watashi
- From the Department of Virology II and .,the Tokyo University of Science Graduate School of Science and Technology, Noda 278-8510, Japan, and.,CREST, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
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30
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Shadboorestan A, Tarfiei GA, Montazeri H, Sepand MR, Zangooei M, Khedri A, Ostad SN, Ghahremani MH. Invasion and migration of MDA-MB-231 cells are inhibited by block of AhR and NFAT: role of AhR/NFAT1/β4 integrin signaling. J Appl Toxicol 2018; 39:375-384. [DOI: 10.1002/jat.3728] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 08/04/2018] [Accepted: 08/15/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Amir Shadboorestan
- Department of Toxicology and Pharmacology, Faculty of Pharmacy; Tehran University of Medical Sciences; Tehran Iran
| | - Ghorban Ali Tarfiei
- Department of Molecular Medicine, School of Advanced Technologies in Medicine; Tehran University of Medical Sciences; Tehran Iran
| | - Hamed Montazeri
- School of Pharmacy-International Campus; Iran University of Medical Sciences; Tehran Iran
| | - Mohammad Reza Sepand
- Department of Toxicology and Pharmacology, Faculty of Pharmacy; Tehran University of Medical Sciences; Tehran Iran
| | - Mohammad Zangooei
- Department of Biochemistry, Faculty of Medicine; Tehran University of Medical Sciences; Tehran Iran
| | - Azam Khedri
- Department of Biochemistry, Faculty of Medicine; Tehran University of Medical Sciences; Tehran Iran
| | - Seyed Nasser Ostad
- Department of Toxicology and Pharmacology, Faculty of Pharmacy; Tehran University of Medical Sciences; Tehran Iran
- Toxicology and Poisoning Research Center, Faculty of Pharmacy; Tehran University of Medical Sciences; Tehran Iran
| | - Mohammad Hossein Ghahremani
- Department of Toxicology and Pharmacology, Faculty of Pharmacy; Tehran University of Medical Sciences; Tehran Iran
- Toxicology and Poisoning Research Center, Faculty of Pharmacy; Tehran University of Medical Sciences; Tehran Iran
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31
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Zgheib E, Limonciel A, Jiang X, Wilmes A, Wink S, van de Water B, Kopp-Schneider A, Bois FY, Jennings P. Investigation of Nrf2, AhR and ATF4 Activation in Toxicogenomic Databases. Front Genet 2018; 9:429. [PMID: 30333853 PMCID: PMC6176024 DOI: 10.3389/fgene.2018.00429] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 09/11/2018] [Indexed: 12/14/2022] Open
Abstract
Toxicological responses to chemical insult are largely regulated by transcriptionally activated pathways that may be independent, correlated and partially or fully overlapping. Investigating the dynamics of the interactions between stress responsive transcription factors from toxicogenomic data and defining the signature of each of them is an additional step toward a system level understanding of perturbation driven mechanisms. To this end, we investigated the segregation of the genes belonging to the three following transcriptionally regulated pathways: the AhR pathway, the Nrf2 pathway and the ATF4 pathway. Toxicogenomic datasets from three projects (carcinoGENOMICS, Predict-IV and TG-GATEs) obtained in various experimental conditions (in human and rat in vitro liver and kidney models and rat in vivo, with bolus administration and with repeated doses) were combined and consolidated where overlaps between datasets existed. A bioinformatic analysis was performed to refine pathways' signatures and to create chemical activation capacity scores to classify chemicals by their potency and selectivity of activation of each pathway. With some refinement such an approach may improve chemical safety classification and allow biological read across on a pathway level.
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Affiliation(s)
- Elias Zgheib
- Laboratoire de Biomécanique et Bio-ingénierie, Sorbonne Universités - Université de Technologie de Compiègne, Compiègne, France
| | - Alice Limonciel
- Division of Molecular and Computational Toxicology, Amsterdam Institute for Molecules, Medicines and Systems, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Xiaoqi Jiang
- Division of Biostatistics, German Cancer Research Center, Heidelberg, Germany
| | - Anja Wilmes
- Division of Molecular and Computational Toxicology, Amsterdam Institute for Molecules, Medicines and Systems, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Steven Wink
- Division of Drug Discovery and Safety, Leiden Cell Observatory High Content Imaging Screening Facility, Leiden Academic Center for Drug Research, Leiden University, Leiden, Netherlands
| | - Bob van de Water
- Division of Drug Discovery and Safety, Leiden Cell Observatory High Content Imaging Screening Facility, Leiden Academic Center for Drug Research, Leiden University, Leiden, Netherlands
| | | | - Frederic Y Bois
- Models for Ecotoxicology and Toxicology Unit (DRC/VIVA/METO), Institut National de l'Environnement Industriel et des Risques, Verneuil-en-Halatte, France
| | - Paul Jennings
- Division of Molecular and Computational Toxicology, Amsterdam Institute for Molecules, Medicines and Systems, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
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32
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O'Donnell EF, Jang HS, Pearce M, Kerkvliet NI, Kolluri SK. The aryl hydrocarbon receptor is required for induction of p21cip1/waf1 expression and growth inhibition by SU5416 in hepatoma cells. Oncotarget 2018; 8:25211-25225. [PMID: 28424418 PMCID: PMC5421923 DOI: 10.18632/oncotarget.16056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 02/06/2017] [Indexed: 11/25/2022] Open
Abstract
The aryl hydrocarbon receptor (AhR) is a potential clinical target for cancer and autoimmune dysfunction. Identifying selective AhR modulators that produce desirable clinical outcomes represents an opportunity for developing new anti-cancer agents. Repurposing clinically-used drugs with established safety profiles that activate the AhR represents a good starting place to pursue this goal. In this study, we characterized the AhR-dependent effects of SU5416 (Semaxanib) following its identification in a small-molecule library screen. SU5416 potently activated AhR-dependent reporter genes, induced AhR nuclear localization, facilitated AhR-DNA binding, and increased, expression of its endogenous target genes. SU5416 significantly inhibited proliferation of Hepa1 hepatoma cells in an AhR-dependent manner, but did not induce apoptosis. SU5416 also inhibited the growth of human HepG2 liver cancer cells. The effects of SU5416 correlated with an increased G1 population and increased expression of cell cycle inhibitor p21cip1/waf1 at both the mRNA and protein level. Increased expression of p21cip1/waf1 by SU5416 required expression of both AhR and Arnt. In addition, evidence for long-term activation of the AhR in vivo by a single dose of SU5416 was identified by analyzing published microarray data. Our results provide support for continued investigation of the AhR as therapeutic for cancers such as hepatocellular carcinoma. In addition, our findings raise the possibility that some of the previously observed anti-proliferative effects of SU5416 may be due to activation of the AhR.
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Affiliation(s)
- Edmond F O'Donnell
- Cancer Research Laboratory, Oregon State University, Corvallis, Oregon, USA.,Department of Environmental and Molecular Toxicology, and Environmental Health Sciences Center, Oregon State University, Corvallis, Oregon, USA
| | - Hyo Sang Jang
- Cancer Research Laboratory, Oregon State University, Corvallis, Oregon, USA.,Department of Environmental and Molecular Toxicology, and Environmental Health Sciences Center, Oregon State University, Corvallis, Oregon, USA
| | - Martin Pearce
- Cancer Research Laboratory, Oregon State University, Corvallis, Oregon, USA.,Department of Environmental and Molecular Toxicology, and Environmental Health Sciences Center, Oregon State University, Corvallis, Oregon, USA
| | - Nancy I Kerkvliet
- Department of Environmental and Molecular Toxicology, and Environmental Health Sciences Center, Oregon State University, Corvallis, Oregon, USA
| | - Siva Kumar Kolluri
- Cancer Research Laboratory, Oregon State University, Corvallis, Oregon, USA.,Department of Environmental and Molecular Toxicology, and Environmental Health Sciences Center, Oregon State University, Corvallis, Oregon, USA
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33
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Choudhary M, Safe S, Malek G. Suppression of aberrant choroidal neovascularization through activation of the aryl hydrocarbon receptor. Biochim Biophys Acta Mol Basis Dis 2018; 1864:1583-1595. [PMID: 29481912 DOI: 10.1016/j.bbadis.2018.02.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 02/17/2018] [Accepted: 02/20/2018] [Indexed: 12/13/2022]
Abstract
The aryl hydrocarbon receptor (AhR) is a ligand activated transcription factor, initially discovered for its role in regulating xenobiotic metabolism. There is extensive evidence supporting a multi-faceted role for AhR, modulating physiological pathways important in cell health and disease. Recently we demonstrated that the AhR plays a role in the pathogenesis of age-related macular degeneration (AMD), the leading cause of vision loss in the elderly. We found that loss of AhR exacerbates choroidal neovascular (CNV) lesion formation in a murine model. Herein we tested the therapeutic impact of AhR activation on CNV lesion formation and factors associated with aberrant neovascularization. We screened a panel of synthetic drugs and endogenous AhR ligands, assessed their ability to activate AhR in choroidal endothelial cells, and inhibit angiogenesis in vitro. Drugs with an anti-angiogenic profile were then administered to a murine model of CNV. Two compounds, leflunomide and flutamide, significantly inhibited CNV formation concurrent with positive modifying effects on angiogenesis, inflammation, extracellular matrix remodeling, and fibrosis. These results validate the role of the AhR pathway in regulating CNV pathogenesis, identify mechanisms of AhR-based therapies in the eye, and argue in favor of developing AhR as a drug target for the treatment of neovascular AMD.
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Affiliation(s)
- Mayur Choudhary
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA
| | - Stephen Safe
- Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Goldis Malek
- Department of Ophthalmology, Duke University School of Medicine, Durham, NC, USA; Department of Pathology, Duke University School of Medicine, Durham, NC, USA.
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34
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Roman ÁC, Carvajal-Gonzalez JM, Merino JM, Mulero-Navarro S, Fernández-Salguero PM. The aryl hydrocarbon receptor in the crossroad of signalling networks with therapeutic value. Pharmacol Ther 2017; 185:50-63. [PMID: 29258844 DOI: 10.1016/j.pharmthera.2017.12.003] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The aryl hydrocarbon receptor (AhR) is well-known for its major contributions to the cellular responses against environmental toxins and carcinogens. Notably, AhR has also emerged as a key transcription factor controlling many physiological processes including cell proliferation and apoptosis, differentiation, adhesion and migration, pluripotency and stemness. These novel functions have broadened our understanding of the signalling pathways and molecular intermediates interacting with AhR under both homeostatic and pathological conditions. Recent discoveries link AhR with the function of essential organs such as liver, skin and gonads, and with complex organismal structures including the immune and cardiovascular systems. The identification of potential endogenous ligands able to regulate AhR activity, opens the possibility of designing ad hoc molecules with pharmacological and/or therapeutic value to treat human diseases in which AhR may have a causal role. Integration of experimental data from in vitro and in vivo studies with "omic" analyses of human patients affected with cancer, immune diseases, inflammation or neurological disorders will likely contribute to validate the clinical relevance of AhR and the possible benefits of modulating its activity by pharmacologically-driven strategies. In this review, we will highlight signalling pathways involved in human diseases that could be targetable by AhR modulators and discuss the feasibility of using such molecules in therapy. The pros and cons of AhR-aimed approaches will be also mentioned.
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Affiliation(s)
- Ángel C Roman
- Champalimaud Neuroscience Programme, Champalimoud Center for the Unknown, Lisbon, Portugal
| | - José M Carvajal-Gonzalez
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura, 06071 Badajoz, Spain
| | - Jaime M Merino
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura, 06071 Badajoz, Spain
| | - Sonia Mulero-Navarro
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura, 06071 Badajoz, Spain.
| | - Pedro M Fernández-Salguero
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura, 06071 Badajoz, Spain.
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35
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Miret N, Rico-Leo E, Pontillo C, Zotta E, Fernández-Salguero P, Randi A. A dioxin-like compound induces hyperplasia and branching morphogenesis in mouse mammary gland, through alterations in TGF-β1 and aryl hydrocarbon receptor signaling. Toxicol Appl Pharmacol 2017; 334:192-206. [DOI: 10.1016/j.taap.2017.09.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 09/12/2017] [Accepted: 09/14/2017] [Indexed: 12/18/2022]
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36
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Akishina AA, Vorontsova JE, Cherezov RO, Mertsalov IB, Zatsepina OG, Slezinger MS, Panin VM, Petruk S, Enikolopov GN, Mazo A, Simonova OB, Kuzin BA. Xenobiotic-induced activation of human aryl hydrocarbon receptor target genes in Drosophila is mediated by the epigenetic chromatin modifiers. Oncotarget 2017; 8:102934-102947. [PMID: 29262535 PMCID: PMC5732701 DOI: 10.18632/oncotarget.22173] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 10/13/2017] [Indexed: 01/07/2023] Open
Abstract
Aryl hydrocarbon receptor (AHR) is the key transcription factor that controls animal development and various adaptive processes. The AHR’s target genes are involved in biodegradation of endogenous and exogenous toxins, regulation of immune response, organogenesis, and neurogenesis. Ligand binding is important for the activation of the AHR signaling pathway. Invertebrate AHR homologs are activated by endogenous ligands whereas vertebrate AHR can be activated by both endogenous and exogenous ligands (xenobiotics). Several studies using mammalian cultured cells have demonstrated that transcription of the AHR target genes can be activated by exogenous AHR ligands, but little is known about the effects of AHR in a living organism. Here, we examined the effects of human AHR and its ligands using transgenic Drosophila lines with an inducible human AhR gene. We found that exogenous AHR ligands can increase as well as decrease the transcription levels of the AHR target genes, including genes that control proliferation, motility, polarization, and programmed cell death. This suggests that AHR activation may affect the expression of gene networks that could be critical for cancer progression and metastasis. Importantly, we found that AHR target genes are also controlled by the enzymes that modify chromatin structure, in particular components of the epigenetic Polycomb Repressive complexes 1 and 2. Since exogenous AHR ligands (alternatively – xenobiotics) and small molecule inhibitors of epigenetic modifiers are often used as pharmaceutical anticancer drugs, our findings may have significant implications in designing new combinations of therapeutic treatments for oncological diseases.
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Affiliation(s)
- Angelina A Akishina
- Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia
| | - Julia E Vorontsova
- Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia
| | - Roman O Cherezov
- Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia
| | - Il'ya B Mertsalov
- Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia
| | - Olga G Zatsepina
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Mikhail S Slezinger
- Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia
| | - Vladislav M Panin
- Department of Biochemistry and Biophysics, Texas A and M University, College Station, TX, USA
| | - Svetlana Petruk
- Department of Biochemistry and Molecular Biology and Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, USA
| | - Grigori N Enikolopov
- Center for Developmental Genetics, Department of Anesthesiology, Stony Brook University, Stony Brook, NY, USA
| | - Alexander Mazo
- Department of Biochemistry and Molecular Biology and Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, USA
| | - Olga B Simonova
- Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia
| | - Boris A Kuzin
- Kol'tsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia
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Potential Mechanisms of Hematological Adverse Drug Reactions in Patients Receiving Clozapine in Combination With Proton Pump Inhibitors. J Psychiatr Pract 2017; 23:114-120. [PMID: 28291036 DOI: 10.1097/pra.0000000000000223] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Clozapine is a second-generation antipsychotic which has proven efficacy in treating the symptoms of schizophrenia. Although clozapine therapy is associated with a number of adverse drug reactions, it is frequently used. One of the most common adverse drug reactions is gastroesophageal reflux disease which is an indication for treatment with proton pump inhibitors (PPIs). Coadministration of clozapine and PPIs increases the risk of hematological adverse drug reactions, including neutropenia and agranulocytosis. The mechanism in idiosyncratic agranulocytosis is not dose related and involves either a direct toxic or an immune-allergic effect. It is suspected that the clozapine metabolites nitrenium ion and N-desmethylclozapine may cause apoptosis or impair growth of granulocytes. Formation of N-desmethylclozapine is correlated with activity of the cytochrome P450 enzymes 1A2 and 3A4 (CYP1A2 and CYP3A4). Nitrenium ion is produced by the flavin-containing monooxygenase system of leukocytes. A drug interaction between clozapine and a PPI is a consequence of the induction of common metabolic pathways either by the PPI or clozapine. Findings to date suggest that indirect induction of flavin-containing monooxygenase by omeprazole through the aryl hydrocarbon receptor increases the expression of the enzyme mRNA and in the long term may cause the increase in activity. Moreover, induction of CYP1A2, especially by omeprazole and lansoprazole, may increase the serum concentration of N-desmethylclozapine, which can accumulate in lymphocytes and may achieve toxic levels. Another hypothesis that may explain hematological adverse drug reactions is competitive inhibition of CYP2C19, which may contribute to increased serum concentrations of toxic metabolites.
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Shrestha AK, Patel A, Menon RT, Jiang W, Wang L, Moorthy B, Shivanna B. Leflunomide induces NAD(P)H quinone dehydrogenase 1 enzyme via the aryl hydrocarbon receptor in neonatal mice. Biochem Biophys Res Commun 2017; 485:195-200. [PMID: 28192119 DOI: 10.1016/j.bbrc.2017.02.051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 02/09/2017] [Indexed: 01/28/2023]
Abstract
Aryl hydrocarbon receptor (AhR) has been increasingly recognized to play a crucial role in normal physiological homeostasis. Additionally, disrupted AhR signaling leads to several pathological states in the lung and liver. AhR activation transcriptionally induces detoxifying enzymes such as cytochrome P450 (CYP) 1A and NAD(P)H quinone dehydrogenase 1 (NQO1). The toxicity profiles of the classical AhR ligands such as 3-methylcholanthrene and dioxins limit their use as a therapeutic agent in humans. Hence, there is a need to identify nontoxic AhR ligands to develop AhR as a clinically relevant druggable target. Recently, we demonstrated that leflunomide, a FDA approved drug, used to treat rheumatoid arthritis in humans, induces CYP1A enzymes in adult mice via the AhR. However, the mechanisms by which this drug induces NQO1 in vivo are unknown. Therefore, we tested the hypothesis that leflunomide will induce pulmonary and hepatic NQO1 enzyme in neonatal mice via AhR-dependent mechanism(s). Leflunomide elicited significant induction of pulmonary CYP1A1 and NQO1 expression in neonatal mice. Interestingly, the dose at which leflunomide increased NQO1 was significantly higher than that required to induce CYP1A1 enzyme. Likewise, it also enhanced hepatic CYP1A1, 1A2 and NQO1 expression in WT mice. In contrast, leflunomide failed to induce these enzymes in AhR-null mice. Our results indicate that leflunomide induces pulmonary and hepatic CYP1A and NQO1 enzymes via the AhR in neonatal mice. These findings have important implications to prevent and/or treat disorders such as bronchopulmonary dysplasia in human infants where AhR may play a crucial role in the disease pathogenesis.
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Affiliation(s)
- Amrit Kumar Shrestha
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Ananddeep Patel
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Renuka T Menon
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Weiwu Jiang
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Lihua Wang
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Bhagavatula Moorthy
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Binoy Shivanna
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, 77030, USA.
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The antiandrogen flutamide is a novel aryl hydrocarbon receptor ligand that disrupts bile acid homeostasis in mice through induction of Abcc4. Biochem Pharmacol 2016; 119:93-104. [PMID: 27569425 DOI: 10.1016/j.bcp.2016.08.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 08/24/2016] [Indexed: 01/14/2023]
Abstract
Flutamide (FLU), an oral, nonsteroidal antiandrogen drug used in the treatment of prostate cancer, is associated with idiosyncratic hepatotoxicity that sometimes causes severe liver damage, including cholestasis, jaundice, and liver necrosis. To understand the mechanism of toxicity, a combination of aryl hydrocarbon receptor (Ahr)-deficient (Ahr-/-) mice, primary hepatocytes, luciferase reporter gene assays, in silico ligand docking and ultra-performance chromatography-quadrupole time-of-flight mass spectrometry-based metabolomics was used. A significant increase of liver weights, and liver and serum bile acid levels was observed after FLU treatment, indicating hepatomegaly and disrupted bile acid homeostasis. Expression of the AhR gene battery was markedly increased in livers of wild-type mice Ahr+/+ treated with FLU, while no change was noted in Ahr-/- mice. Messenger RNAs encoded by AhR target genes were induced in primary mouse hepatocytes cultured with FLU, which confirmed the in vivo results. Ligand-docking analysis further predicted that FLU is an AhR agonist ligand which was confirmed by luciferase reporter gene assays. Multivariate data analysis showed that bile acids were responsible for the separation of vehicle- and FLU-treated Ahr+/+ mice, while there was no separation in Ahr-/- mice. Expression of mRNA encoding the bile acid transporter ABCC4 was increased and farnesoid X receptor signaling was inhibited in the livers of Ahr+/+ mice, but not in Ahr-/- mice treated with FLU, in agreement with the observed downstream metabolic alterations. These findings provide new insights into the mechanism of liver injury caused by FLU treatment involving activation of AhR and the alterations of bile acid homeostasis, which could guide clinical application.
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Mulero-Navarro S, Fernandez-Salguero PM. New Trends in Aryl Hydrocarbon Receptor Biology. Front Cell Dev Biol 2016; 4:45. [PMID: 27243009 PMCID: PMC4863130 DOI: 10.3389/fcell.2016.00045] [Citation(s) in RCA: 180] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 04/28/2016] [Indexed: 12/28/2022] Open
Abstract
Traditionally considered as a critical intermediate in the toxic and carcinogenic response to dioxin (2,3,7,8-tetrachlorodibenzo-p-dioxin, TCDD), the Aryl hydrocarbon/Dioxin receptor (AhR) has proven to be also an important regulator of cell physiology and organ homeostasis. AhR has become an interesting and actual area of research mainly boosted by a significant number of recent studies analyzing its contribution to the proper functioning of the immune, hepatic, cardiovascular, vascular and reproductive systems. At the cellular level, AhR establishes functional interactions with signaling pathways governing cell proliferation and cell cycle, cell morphology, cell adhesion and cell migration. Two exciting new aspects in AhR biology deal with its implication in the control of cell differentiation and its more than likely involvement in cell pluripotency and stemness. In fact, it is possible that AhR could help modulate the balance between differentiation and pluripotency in normal and transformed tumor cells. At the molecular level, AhR regulates an increasingly large array of physiologically relevant genes either by traditional transcription-dependent mechanisms or by unforeseen processes involving genomic insulators, chromatin dynamics and the transcription of mobile genetic elements. AhR is also closely related to epigenetics, not only from the point of view of target gene expression but also with respect to its own regulation by promoter methylation. It is reasonable to consider that deregulation of these many functions could have a causative role, or at least contribute to, human disease. Consequently, several laboratories have proposed that AhR could be a valuable tool as diagnostic marker and/or therapeutic target in human pathologies. An additional point of interest is the possibility of regulating AhR activity by endogenous non-toxic low weight molecules agonist or antagonist molecules that could be present or included in the diet. In this review, we will address these molecular and functional features of AhR biology within physiological and pathological contexts.
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Affiliation(s)
- Sonia Mulero-Navarro
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura Badajoz, Spain
| | - Pedro M Fernandez-Salguero
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Ciencias, Universidad de Extremadura Badajoz, Spain
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Matsuda S, Adachi J, Ihara M, Tanuma N, Shima H, Kakizuka A, Ikura M, Ikura T, Matsuda T. Nuclear pyruvate kinase M2 complex serves as a transcriptional coactivator of arylhydrocarbon receptor. Nucleic Acids Res 2016; 44:636-47. [PMID: 26405201 PMCID: PMC4737187 DOI: 10.1093/nar/gkv967] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 09/13/2015] [Accepted: 09/15/2015] [Indexed: 11/15/2022] Open
Abstract
Pyruvate kinase M2 (PKM2) and pyruvate dehydrogenase complex (PDC) regulate production of acetyl-CoA, which functions as an acetyl donor in diverse enzymatic reactions, including histone acetylation. However, the mechanism by which the acetyl-CoA required for histone acetylation is ensured in a gene context-dependent manner is not clear. Here we show that PKM2, the E2 subunit of PDC and histone acetyltransferase p300 constitute a complex on chromatin with arylhydrocarbon receptor (AhR), a transcription factor associated with xenobiotic metabolism. All of these factors are recruited to the enhancer of AhR-target genes, in an AhR-dependent manner. PKM2 contributes to enhancement of transcription of cytochrome P450 1A1 (CYP1A1), an AhR-target gene, acetylation at lysine 9 of histone H3 at the CYP1A1 enhancer. Site-directed mutagenesis of PKM2 indicates that this enhancement of histone acetylation requires the pyruvate kinase activity of the enzyme. Furthermore, we reveal that PDC activity is present in nuclei. Based on these findings, we propose a local acetyl-CoA production system in which PKM2 and PDC locally supply acetyl-CoA to p300 from abundant PEP for histone acetylation at the gene enhancer, and our data suggest that PKM2 sensitizes AhR-mediated detoxification in actively proliferating cells such as cancer and fetal cells.
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Affiliation(s)
- Shun Matsuda
- Research Center for Environmental Quality Management, Kyoto University, Shiga 520-0811, Japan
| | - Jun Adachi
- Laboratory of Proteome Research, National Institute of Biomedical Innovation, Osaka 567-0085, Japan
| | - Masaru Ihara
- Research Center for Environmental Quality Management, Kyoto University, Shiga 520-0811, Japan
| | - Nobuhiro Tanuma
- Division of Cancer Chemotherapy, Miyagi Cancer Center Research Institute, Miyagi 981-1293, Japan
| | - Hiroshi Shima
- Division of Cancer Chemotherapy, Miyagi Cancer Center Research Institute, Miyagi 981-1293, Japan
| | - Akira Kakizuka
- Laboratory of Functional Biology, Kyoto University Graduate School of Biostudies, Kyoto 606-8501, Japan
| | - Masae Ikura
- Laboratory of Chromatin Regulatory Network, Department of Mutagenesis, Radiation Biology Center, Kyoto University, Kyoto 606-8501, Japan
| | - Tsuyoshi Ikura
- Laboratory of Chromatin Regulatory Network, Department of Mutagenesis, Radiation Biology Center, Kyoto University, Kyoto 606-8501, Japan
| | - Tomonari Matsuda
- Research Center for Environmental Quality Management, Kyoto University, Shiga 520-0811, Japan
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Goswami SK, Inceoglu B, Yang J, Wan D, Kodani SD, da Silva CAT, Morisseau C, Hammock BD. Omeprazole increases the efficacy of a soluble epoxide hydrolase inhibitor in a PGE₂ induced pain model. Toxicol Appl Pharmacol 2015; 289:419-27. [PMID: 26522832 DOI: 10.1016/j.taap.2015.10.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 10/21/2015] [Accepted: 10/27/2015] [Indexed: 12/26/2022]
Abstract
Epoxyeicosatrienoic acids (EETs) are potent endogenous analgesic metabolites produced from arachidonic acid by cytochrome P450s (P450s). Metabolism of EETs by soluble epoxide hydrolase (sEH) reduces their activity, while their stabilization by sEH inhibition decreases both inflammatory and neuropathic pain. Here, we tested the complementary hypothesis that increasing the level of EETs through induction of P450s by omeprazole (OME), can influence pain related signaling by itself, and potentiate the anti-hyperalgesic effect of sEH inhibitor. Rats were treated with OME (100mg/kg/day, p.o., 7 days), sEH inhibitor TPPU (3mg/kg/day, p.o.) and OME (100mg/kg/day, p.o., 7 days)+TPPU (3mg/kg/day, p.o., last 3 days of OME dose) dissolved in vehicle PEG400, and their effect on hyperalgesia (increased sensitivity to pain) induced by PGE2 was monitored. While OME treatment by itself exhibited variable effects on PGE2 induced hyperalgesia, it strongly potentiated the effect of TPPU in the same assay. The significant decrease in pain with OME+TPPU treatment correlated with the increased levels of EETs in plasma and increased activities of P450 1A1 and P450 1A2 in liver microsomes. The results show that reducing catabolism of EETs with a sEH inhibitor yielded a stronger analgesic effect than increasing generation of EETs by OME, and combination of both yielded the strongest pain reducing effect under the condition of this study.
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Affiliation(s)
- Sumanta Kumar Goswami
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Bora Inceoglu
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Jun Yang
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Debin Wan
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Sean D Kodani
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Carlos Antonio Trindade da Silva
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA; Department of Genetics and Biochemistry, Federal University of Uberlandia, MG, Brazil
| | - Christophe Morisseau
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Bruce D Hammock
- Department of Entomology and Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA.
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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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Esser C, Rannug A. The aryl hydrocarbon receptor in barrier organ physiology, immunology, and toxicology. Pharmacol Rev 2015; 67:259-79. [PMID: 25657351 DOI: 10.1124/pr.114.009001] [Citation(s) in RCA: 351] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The aryl hydrocarbon receptor (AhR) is an evolutionarily old transcription factor belonging to the Per-ARNT-Sim-basic helix-loop-helix protein family. AhR translocates into the nucleus upon binding of various small molecules into the pocket of its single-ligand binding domain. AhR binding to both xenobiotic and endogenous ligands results in highly cell-specific transcriptome changes and in changes in cellular functions. We discuss here the role of AhR for immune cells of the barrier organs: skin, gut, and lung. Both adaptive and innate immune cells require AhR signaling at critical checkpoints. We also discuss the current two prevailing views-namely, 1) AhR as a promiscuous sensor for small chemicals and 2) a role for AhR as a balancing factor for cell differentiation and function, which is controlled by levels of endogenous high-affinity ligands. AhR signaling is considered a promising drug and preventive target, particularly for cancer, inflammatory, and autoimmune diseases. Therefore, understanding its biology is of great importance.
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Affiliation(s)
- Charlotte Esser
- Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany (C.E.); and Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (A.R.)
| | - Agneta Rannug
- Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany (C.E.); and Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (A.R.)
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Hubbard TD, Murray IA, Perdew GH. Indole and Tryptophan Metabolism: Endogenous and Dietary Routes to Ah Receptor Activation. Drug Metab Dispos 2015; 43:1522-35. [PMID: 26041783 PMCID: PMC4576673 DOI: 10.1124/dmd.115.064246] [Citation(s) in RCA: 416] [Impact Index Per Article: 46.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 06/02/2015] [Indexed: 12/31/2022] Open
Abstract
The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor recognized for its role in xenobiotic metabolism. The physiologic function of AHR has expanded to include roles in immune regulation, organogenesis, mucosal barrier function, and the cell cycle. These functions are likely dependent upon ligand-mediated activation of the receptor. High-affinity ligands of AHR have been classically defined as xenobiotics, such as polychlorinated biphenyls and dioxins. Identification of endogenous AHR ligands is key to understanding the physiologic functions of this enigmatic receptor. Metabolic pathways targeting the amino acid tryptophan and indole can lead to a myriad of metabolites, some of which are AHR ligands. Many of these ligands exhibit species selective preferential binding to AHR. The discovery of specific tryptophan metabolites as AHR ligands may provide insight concerning where AHR is activated in an organism, such as at the site of inflammation and within the intestinal tract.
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Affiliation(s)
- Troy D Hubbard
- Graduate Program in Biochemistry, Microbiology, and Molecular Biology (T.D.H.), and Center for Molecular Toxicology and Carcinogenesis and the Department of Veterinary and Biomedical Sciences (T.D.H., I.A.M., G.H.P)., Pennsylvania State University, University Park, Pennsylvania
| | - Iain A Murray
- Graduate Program in Biochemistry, Microbiology, and Molecular Biology (T.D.H.), and Center for Molecular Toxicology and Carcinogenesis and the Department of Veterinary and Biomedical Sciences (T.D.H., I.A.M., G.H.P)., Pennsylvania State University, University Park, Pennsylvania
| | - Gary H Perdew
- Graduate Program in Biochemistry, Microbiology, and Molecular Biology (T.D.H.), and Center for Molecular Toxicology and Carcinogenesis and the Department of Veterinary and Biomedical Sciences (T.D.H., I.A.M., G.H.P)., Pennsylvania State University, University Park, Pennsylvania
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Cheng Y, Jin UH, Allred CD, Jayaraman A, Chapkin RS, Safe S. Aryl Hydrocarbon Receptor Activity of Tryptophan Metabolites in Young Adult Mouse Colonocytes. Drug Metab Dispos 2015; 43:1536-43. [PMID: 25873348 PMCID: PMC4576676 DOI: 10.1124/dmd.115.063677] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 01/01/2015] [Indexed: 01/07/2023] Open
Abstract
The tryptophan microbiota metabolites indole-3-acetate, indole-3-aldehyde, indole, and tryptamine are aryl hydrocarbon receptor (AhR) ligands, and in this study we investigated their AhR agonist and antagonist activities in nontransformed young adult mouse colonocyte (YAMC) cells. Using Cyp1a1 mRNA as an Ah-responsive end point, we observed that the tryptophan metabolites were weak AhR agonists and partial antagonists in YAMC cells, and the pattern of activity was different from that previously observed in CaCo2 colon cancer cells. However, expansion of the end points to other Ah-responsive genes including the Cyp1b1, the AhR repressor (Ahrr), and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-inducible poly(ADP-ribose) polymerase (TiParp) revealed a highly complex pattern of AhR agonist/antagonist activities that were both ligand- and gene-dependent. For example, the magnitude of induction of Cyp1b1 mRNA was similar for TCDD, tryptamine, and indole-3-acetate, whereas lower induction was observed for indole and indole-3-aldehyde was inactive. These results suggest that the tryptophan metabolites identified in microbiota are selective AhR modulators.
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Affiliation(s)
- Yating Cheng
- Department of Veterinary Physiology and Pharmacology (Y.C., U.-H.J., S.S.), Department of Nutrition and Food Science (C.D.A., R.S.C.), Department of Chemical Engineering (A.J.), Texas A&M University, College Station, Texas
| | - Un-Ho Jin
- Department of Veterinary Physiology and Pharmacology (Y.C., U.-H.J., S.S.), Department of Nutrition and Food Science (C.D.A., R.S.C.), Department of Chemical Engineering (A.J.), Texas A&M University, College Station, Texas
| | - Clint D Allred
- Department of Veterinary Physiology and Pharmacology (Y.C., U.-H.J., S.S.), Department of Nutrition and Food Science (C.D.A., R.S.C.), Department of Chemical Engineering (A.J.), Texas A&M University, College Station, Texas
| | - Arul Jayaraman
- Department of Veterinary Physiology and Pharmacology (Y.C., U.-H.J., S.S.), Department of Nutrition and Food Science (C.D.A., R.S.C.), Department of Chemical Engineering (A.J.), Texas A&M University, College Station, Texas
| | - Robert S Chapkin
- Department of Veterinary Physiology and Pharmacology (Y.C., U.-H.J., S.S.), Department of Nutrition and Food Science (C.D.A., R.S.C.), Department of Chemical Engineering (A.J.), Texas A&M University, College Station, Texas
| | - Stephen Safe
- Department of Veterinary Physiology and Pharmacology (Y.C., U.-H.J., S.S.), Department of Nutrition and Food Science (C.D.A., R.S.C.), Department of Chemical Engineering (A.J.), Texas A&M University, College Station, Texas
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47
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Patel A, Zhang S, Paramahamsa M, Jiang W, Wang L, Moorthy B, Shivanna B. Leflunomide Induces Pulmonary and Hepatic CYP1A Enzymes via Aryl Hydrocarbon Receptor. Drug Metab Dispos 2015; 43:1966-70. [PMID: 26417045 DOI: 10.1124/dmd.115.066084] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 09/25/2015] [Indexed: 11/22/2022] Open
Abstract
Emerging evidence indicates that the aryl hydrocarbon receptor (AhR) plays a crucial role in normal physiologic homeostasis. Additionally, aberrant AhR signaling leads to several pathologic states in the lung and liver. Activation of AhR transcriptionally induces phase I (CYP1A) detoxifying enzymes. Although the effects of the classic AhR ligands such as 3-methylcholanthrene and dioxins on phase 1 enzymes are well studied in rodent lung, liver, and other organs, the toxicity profiles limit their use as therapeutic agents in humans. Hence, there is a need to identify and investigate nontoxic AhR ligands not only to understand the AhR biology but also to develop the AhR as a clinically relevant therapeutic target. Leflunomide is a Food and Drug Administration-approved drug in humans that is known to have AhR agonist activity in vitro. Whether it activates AhR and induces phase 1 enzymes in vivo is unknown. Therefore, we tested the hypothesis that leflunomide will induce pulmonary and hepatic CYP1A enzymes in C57BL/6J wild-type mice, but not in AhR-null mice. We performed real-time reverse-transcription polymerase chain reaction analyses for CYP1A1/2 mRNA expression, western blot assays for CYP1A1/2 protein expression, and ethoxyresorufinO-deethylase assay for CYP1A1 catalytic activity. Leflunomide increased CYP1A1/A2 mRNA, protein, and enzymatic activities in wild-type mice. In contrast, leflunomide failed to increase pulmonary and hepatic CYP1A enzymes in AhR-null mice. In conclusion, we provide evidence that leflunomide induces pulmonary and hepatic CYP1A enzymes via the AhR.
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Affiliation(s)
- Ananddeep Patel
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Shaojie Zhang
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Maturu Paramahamsa
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Weiwu Jiang
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Lihua Wang
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Bhagavatula Moorthy
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
| | - Binoy Shivanna
- Section of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, Texas
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Riddell N, Jin UH, Safe S, Cheng Y, Chittim B, Konstantinov A, Parette R, Pena-Abaurrea M, Reiner EJ, Poirier D, Stefanac T, McAlees AJ, McCrindle R. Characterization and Biological Potency of Mono- to Tetra-Halogenated Carbazoles. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:10658-10666. [PMID: 26226543 DOI: 10.1021/acs.est.5b02751] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This paper deals with the characterization and aryl hydrocarbon receptor (AhR) agonist activities of a series of chlorinated, brominated, and mixed bromo/chlorocarbazoles, some of which have been identified in various environmental samples. Attention is directed here to the possibility that halogenated carbazoles may currently be emitted into the environment as a result of the production of carbazole-containing polymers present in a wide variety of electronic devices. We have found that any carbazole that is not substituted in the 1,3,6,8 positions may be lost during cleanup of environmental extracts if a multilayer column is utilized, as is common practice for polychlorinated dibenzo-p-dioxin (dioxin) and related compounds. In the present study, (1)H NMR spectral shift data for 11 relevant halogenated carbazoles are reported, along with their gas chromatographic separation and analysis by mass spectrometry. These characterization data allow for confident structural assignments and the derivation of possible correlations between structure and toxicity based on the halogenation patterns of the isomers investigated. Some halogenated carbazoles exhibit characteristics of persistent organic pollutants and their potential dioxin-like activity was further investigated. The structure-dependent induction of CYP1A1 and CYP1B1 gene expression in Ah-responsive MDA-MB-468 breast cancer cells by these carbazoles was similar to that observed for other dioxin-like compounds, and the magnitude of the fold induction responses for the most active halogenated carbazoles was similar to that observed for 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). 2,3,6,7-Tetrachlorocarbazole was one of the most active halogenated carbazoles and, like TCDD, contains 4 lateral substituents; however, the estimated relative effect potency for this compound (compared to TCDD) was 0.0001 and 0.0032, based on induction of CYP1A1 and CYP1B1 mRNA, respectively.
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Affiliation(s)
- Nicole Riddell
- Wellington Laboratories Inc. , 345 Southgate Drive, Guelph, Ontario Canada N1G 3M5
| | - Un-Ho Jin
- Department of Veterinary Physiology & Pharmacology, Texas A&M University , College Station, Texas 77843-4466, United States
| | - Stephen Safe
- Department of Veterinary Physiology & Pharmacology, Texas A&M University , College Station, Texas 77843-4466, United States
| | - Yating Cheng
- Department of Veterinary Physiology & Pharmacology, Texas A&M University , College Station, Texas 77843-4466, United States
| | - Brock Chittim
- Wellington Laboratories Inc. , 345 Southgate Drive, Guelph, Ontario Canada N1G 3M5
| | - Alex Konstantinov
- Wellington Laboratories Inc. , 345 Southgate Drive, Guelph, Ontario Canada N1G 3M5
| | - Robert Parette
- Matson & Associates, Inc. , 331 East Foster Avenue, State College, Pennsylvania 16801, United States
| | - Miren Pena-Abaurrea
- Ontario Ministry of the Environment , 125 Resources Road, Toronto, Ontario M9P 3 V6, Canada
- Department of Chemistry, University of Toronto , Toronto, Ontario M5S 3H6, Canada
| | - Eric J Reiner
- Ontario Ministry of the Environment , 125 Resources Road, Toronto, Ontario M9P 3 V6, Canada
- Department of Chemistry, University of Toronto , Toronto, Ontario M5S 3H6, Canada
| | - David Poirier
- Ontario Ministry of the Environment , 125 Resources Road, Toronto, Ontario M9P 3 V6, Canada
| | - Tomislav Stefanac
- Wellington Laboratories Inc. , 345 Southgate Drive, Guelph, Ontario Canada N1G 3M5
| | - Alan J McAlees
- Wellington Laboratories Inc. , 345 Southgate Drive, Guelph, Ontario Canada N1G 3M5
| | - Robert McCrindle
- Wellington Laboratories Inc. , 345 Southgate Drive, Guelph, Ontario Canada N1G 3M5
- Department of Chemistry, University of Guelph , Guelph, Ontario N1G 2W1, Canada
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49
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Das Gupta S, Sae-tan S, Wahler J, So JY, Bak MJ, Cheng LC, Lee MJ, Lin Y, Shih WJ, Shull JD, Safe S, Yang CS, Suh N. Dietary γ-Tocopherol-Rich Mixture Inhibits Estrogen-Induced Mammary Tumorigenesis by Modulating Estrogen Metabolism, Antioxidant Response, and PPARγ. Cancer Prev Res (Phila) 2015; 8:807-16. [PMID: 26130252 DOI: 10.1158/1940-6207.capr-15-0154] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 06/17/2015] [Indexed: 02/07/2023]
Abstract
This study evaluated the anticancer activity and mechanism of action of a γ-tocopherol-rich tocopherol mixture, γ-TmT, in two different animal models of estrogen-induced breast cancer. The chemopreventive effect of γ-TmT at early (6 weeks), intermediate (18 weeks), and late (31 weeks) stages of mammary tumorigenesis was determined using the August-Copenhagen Irish rat model. Female rats receiving 17β-estradiol (E2) implants were administered with different doses (0%, 0.05%, 0.1%, 0.3%, and 0.5%) of γ-TmT diet. Treatment with 0.3% and 0.5% γ-TmT decreased tumor volume and multiplicity. At 31 weeks, serum concentrations of E2 were significantly decreased by γ-TmT. γ-TmT preferentially induced expression of the E2-metabolizing enzyme CYP1A1, over CYP1B1 in the rat mammary tissues. Nrf2-dependent antioxidant response was stimulated by γ-TmT, as evident from enhanced expression of its downstream targets, NQO1, GCLM, and HMOX1. Serum concentrations of the oxidative stress marker, 8-isoprostane, were also decreased in the γ-TmT-treated groups. Treatment with γ-TmT increased expression of PPARγ and its downstream genes, PTEN and p27, whereas the cell proliferation marker, PCNA, was significantly reduced in γ-TmT-treated mammary tumors. In an orthotopic model in which human MCF-7 breast cancer cells were injected into the mammary fat pad of immunodeficient mice, γ-TmT inhibited E2-dependent tumor growth at all the doses tested. In conclusion, γ-TmT reduced mammary tumor development, in part through decreased E2 availability and reduced oxidative stress in mammary tissues; γ-TmT could thus be an effective agent for the prevention and treatment of E2-induced breast cancer.
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Affiliation(s)
- Soumyasri Das Gupta
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey
| | - Sudathip Sae-tan
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey
| | - Joseph Wahler
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey
| | - Jae Young So
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey
| | - Min Ji Bak
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey
| | - Larry C Cheng
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey
| | - Mao-Jung Lee
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey
| | - Yong Lin
- Department of Biostatistics, School of Public Health, Rutgers University. Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey
| | - Weichung Joe Shih
- Department of Biostatistics, School of Public Health, Rutgers University. Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey
| | - James D Shull
- McArdle Laboratory for Cancer Research, Department of Oncology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin
| | - Stephen Safe
- Department of Veterinary Physiology and Pharmacology, Texas A & M University, College Station, Texas
| | - Chung S Yang
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey. Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey
| | - Nanjoo Suh
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey. Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey.
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50
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Jin UH, Kim SB, Safe S. Omeprazole Inhibits Pancreatic Cancer Cell Invasion through a Nongenomic Aryl Hydrocarbon Receptor Pathway. Chem Res Toxicol 2015; 28:907-18. [PMID: 25826687 PMCID: PMC4948974 DOI: 10.1021/tx5005198] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Omeprazole and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) are aryl hydrocarbon receptor (AhR) agonists that inhibit the invasion of breast cancer cells through inhibition of CXCR4 transcription. Treatment of highly invasive Panc1 pancreatic cancer cells with TCDD, omeprazole, and seven other AhR-active pharmaceuticals showed that only omeprazole and tranilast, but not TCDD, inhibited invasion in a Boyden chamber assay. Similar results were observed in MiaPaCa2 cells, another quasimensenchymal pancreatic ductal adenocarcinoma (QM-PDA) pancreatic cancer cell line, whereas invasion was not observed with BxPC3 or L3.6pL cells, which are classified as classical (less invasive) pancreatic cancer cells. It was also observed in QM-PDA cells that TCDD, omeprazole, and tranilast did not induce CYP1A1 or CXCR4 and that treatment with these compounds did not result in nuclear uptake of AhR. In contrast, treatment of BxPC3 and L3.6pL cells with these AhR ligands resulted in induction of CYP1A1 (by TCDD) and nuclear uptake of AhR, which was similar to that observed for Ah-responsive MDA-MB-468 breast and HepG2 liver cancer cell lines. Results of AhR and AhR nuclear translocator (Arnt) knockdown experiments in Panc1 and MiaPaCa2 cells demonstrated that omeprazole- and tranilast-mediated inhibition of invasion was AhR-dependent but Arnt-independent. These results demonstrate that in the most highly invasive subtype of pancreatic cancer cells (QM-PDA) the selective AhR modulators omeprazole and tranilast inhibit invasion through a nongenomic AhR pathway.
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Affiliation(s)
- Un-Ho Jin
- Department of Veterinary Physiology & Pharmacology, Texas A&M University, 4466 TAMU, College Station, TX 77843-4466
| | - Sang-Bae Kim
- Department of Systems Biology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030
| | - Stephen Safe
- Department of Veterinary Physiology & Pharmacology, Texas A&M University, 4466 TAMU, College Station, TX 77843-4466
- Institute of Biosciences and Technology, Texas A&M Health Science Center, 2121 W. Holcombe Blvd., Houston TX 77030
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