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Wang P, Chen S, Wang Y, Wang X, Yan L, Yang K, Zhong XB, Han S, Zhang L. The Long Noncoding RNA Hepatocyte Nuclear Factor 4 α Antisense RNA 1 Negatively Regulates Cytochrome P450 Enzymes in Huh7 Cells via Histone Modifications. Drug Metab Dispos 2021; 49:361-368. [PMID: 33674270 DOI: 10.1124/dmd.120.000316] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 02/02/2021] [Indexed: 01/22/2023] Open
Abstract
The maintenance of homeostasis of cytochromes P450 enzymes (P450s) under both physiologic and xenobiotic exposure conditions is ensured by the action of positive and negative regulators. In the current study, the hepatocyte nuclear factor 4α (HNF4A) antisense RNA 1 (HNF4A-AS1), an antisense long noncoding RNA of HNF4A, was found to be a negative regulator of the basal and rifampicin (RIF)-induced expression of nuclear receptors and downstream P450s. In Huh7 cells, knockdown of HNF4A-AS1 resulted in elevated expression of HNF4A, pregnane X receptor (PXR), and P450s (including CYP3A4) under both basal and RIF-induced conditions. Conversely, overexpression of HNF4A-AS1 led to decreased basal expression of constitutive androstane receptor, aryl hydrocarbon receptor, PXR, and all studied P450s. Of note, significantly diminished induction levels of PXR and CYP1A2, 2C8, 2C19, and 3A4 by RIF were also observed in HNF4A-AS1 plasmid-transfected Huh7 cells. Moreover, the negative feedback of HNF4A on HNF4A-AS1-mediated gene expression was validated using a loss-of-function experiment in this study. Strikingly, our data showed that increased enrichment levels of histone 3 lysine 4 trimethylation and HNF4A in the CYP3A4 promoter contribute to the elevated CYP3A4 expression after HNF4A-AS1 knockdown. Overall, the current study reveals that histone modifications contribute to the negative regulation of nuclear receptors and P450s by HNF4A-AS1 in basal and drug-induced levels. SIGNIFICANCE STATEMENT: Utilizing loss-of-function and gain-of-function experiments, the current study systematically investigated the negative regulation of HNF4A-AS1 on the expression of nuclear receptors (including HNF4A, constitutive androstane receptor, aryl hydrocarbon receptor, and pregnane X receptor) and P450s (including CYP1A2, 2E1, 2B6, 2D6, 2C8, 2C9, 2C19, and 3A4) in both basal and rifampicin-induced levels in Huh7 cells. Notably, this study is the first to reveal the contribution of histone modification to the HNF4A-AS1-mediated expression of CYP3A4 in Huh7 cells.
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Affiliation(s)
- Pei Wang
- Department of Pharmacology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China (P.W., S.C., Y.W., X.W., K.Y., S.H., L.Z.); Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (L.Y.); and Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut (X.-b.Z.)
| | - Shitong Chen
- Department of Pharmacology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China (P.W., S.C., Y.W., X.W., K.Y., S.H., L.Z.); Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (L.Y.); and Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut (X.-b.Z.)
| | - Yiting Wang
- Department of Pharmacology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China (P.W., S.C., Y.W., X.W., K.Y., S.H., L.Z.); Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (L.Y.); and Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut (X.-b.Z.)
| | - Xiaofei Wang
- Department of Pharmacology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China (P.W., S.C., Y.W., X.W., K.Y., S.H., L.Z.); Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (L.Y.); and Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut (X.-b.Z.)
| | - Liang Yan
- Department of Pharmacology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China (P.W., S.C., Y.W., X.W., K.Y., S.H., L.Z.); Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (L.Y.); and Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut (X.-b.Z.)
| | - Kun Yang
- Department of Pharmacology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China (P.W., S.C., Y.W., X.W., K.Y., S.H., L.Z.); Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (L.Y.); and Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut (X.-b.Z.)
| | - Xiao-Bo Zhong
- Department of Pharmacology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China (P.W., S.C., Y.W., X.W., K.Y., S.H., L.Z.); Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (L.Y.); and Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut (X.-b.Z.)
| | - Shengna Han
- Department of Pharmacology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China (P.W., S.C., Y.W., X.W., K.Y., S.H., L.Z.); Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (L.Y.); and Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut (X.-b.Z.)
| | - Lirong Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China (P.W., S.C., Y.W., X.W., K.Y., S.H., L.Z.); Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China (L.Y.); and Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut (X.-b.Z.)
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Creamer BA, Sloan SNB, Dennis JF, Rogers R, Spencer S, McCuen A, Persaud P, Staudinger JL. Associations between Pregnane X Receptor and Breast Cancer Growth and Progression. Cells 2020; 9:cells9102295. [PMID: 33076284 PMCID: PMC7602492 DOI: 10.3390/cells9102295] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/11/2020] [Accepted: 10/12/2020] [Indexed: 02/07/2023] Open
Abstract
Pregnane X receptor (PXR, NR1I2) is a member of the ligand-activated nuclear receptor superfamily. This receptor is promiscuous in its activation profile and is responsive to a broad array of both endobiotic and xenobiotic ligands. PXR is involved in pivotal cellular detoxification processes to include the regulation of genes that encode key drug-metabolizing cytochrome-P450 enzymes, oxidative stress response, as well as enzymes that drive steroid and bile acid metabolism. While PXR clearly has important regulatory roles in the liver and gastrointestinal tract, this nuclear receptor also has biological functions in breast tissue. In this review, we highlight current knowledge of PXR’s role in mammary tumor carcinogenesis. The elevated level of PXR expression in cancerous breast tissue suggests a likely interface between aberrant cell division and xeno-protection in cancer cells. Moreover, PXR itself exerts positive effect on the cell cycle, thereby predisposing tumor cells to unchecked proliferation. Activation of PXR also plays a key role in regulating apoptosis, as well as in acquired resistance to chemotherapeutic agents. The repressive role of PXR in regulating inflammatory mediators along with the existence of genetic polymorphisms within the sequence of the PXR gene may predispose individuals to developing breast cancer. Further investigations into the role that PXR plays in driving tumorigenesis are needed.
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Ozawa S, Yamaori S, Aikawa K, Kamijo S, Ohmori S. Expression profile of cytochrome P450s and effects of polycyclic aromatic hydrocarbons and antiepileptic drugs on CYP1 expression in MOG-G-CCM cells. Life Sci 2020; 258:118140. [PMID: 32730838 DOI: 10.1016/j.lfs.2020.118140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 07/09/2020] [Accepted: 07/20/2020] [Indexed: 10/23/2022]
Abstract
AIMS This study was performed to investigate the expression profile of cytochrome P450 (CYP) isoforms and effects of polycyclic aromatic hydrocarbons (PAHs) and antiepileptic drugs on CYP1 expression in human astrocytoma MOG-G-CCM cells. MAIN METHODS CYP1A1 and CYP1B1 expression were determined by quantitative real-time polymerase chain reaction, Western blotting, and immunocytochemistry. KEY FINDINGS MOG-G-CCM cells expressed various CYP isoforms. Among the CYP isoforms analyzed, CYP1B1 showed the highest expression level, followed by CYP1A1. Furthermore, CYP1B1 was localized in both the endoplasmic reticulum and mitochondria. 3-Methylcholanthrene (3-MC), benz[a]anthracene (B[a]A), benzo[a]pyrene (B[a]P), and valproic acid (VPA) increased the expression of CYP1B1 and CYP1A1. The potent aryl hydrocarbon receptor antagonist GNF351 significantly suppressed the 3-MC- and VPA-mediated upregulation of CYP1B1 and CYP1A1. In addition, VPA potentiated the induction of CYP1B1 and CYP1A1 by 3-MC, B[a]A, and B[a]P, although the augmentation of CYP1A1 was more remarkable than that of CYP1B1. In contrast, other antiepileptic drugs (carbamazepine, lamotrigine, levetiracetam, phenytoin) did not affect the 3-MC-mediated upregulation of CYP1B1 and CYP1A1. VPA is known to act as a histone deacetylase (HDAC) inhibitor. Therefore, the effects of trichostatin A, a representative HDAC inhibitor, on CYP1 induction by 3-MC were examined. Trichostatin A enhanced the 3-MC-mediated upregulation of CYP1A1 but not CYP1B1. SIGNIFICANCE These results partially indicated that VPA may augment the PAH-mediated induction of CYP1B1 and CYP1A1 through the activation of transcription by HDAC inhibition.
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Affiliation(s)
- Shusuke Ozawa
- Department of Pharmacy, Shinshu University Hospital, 3-1-1 Asahi, Matsumoto 390-8621, Japan; Department of Biochemical Pharmacology and Toxicology, Graduate School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, 390-8621 Matsumoto, Japan
| | - Satoshi Yamaori
- Department of Pharmacy, Shinshu University Hospital, 3-1-1 Asahi, Matsumoto 390-8621, Japan; Department of Biochemical Pharmacology and Toxicology, Graduate School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, 390-8621 Matsumoto, Japan.
| | - Kaori Aikawa
- Department of Biochemical Pharmacology and Toxicology, Graduate School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, 390-8621 Matsumoto, Japan
| | - Shinobu Kamijo
- Department of Biochemical Pharmacology and Toxicology, Graduate School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, 390-8621 Matsumoto, Japan
| | - Shigeru Ohmori
- Department of Pharmacy, Shinshu University Hospital, 3-1-1 Asahi, Matsumoto 390-8621, Japan; Department of Biochemical Pharmacology and Toxicology, Graduate School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, 390-8621 Matsumoto, Japan
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Fu L, Zhou L, Geng S, Li M, Lu W, Lu Y, Feng Z, Zhou X. Catalpol coordinately regulates phase I and II detoxification enzymes of Triptolide through CAR and NRF2 pathways to reduce Triptolide-induced hepatotoxicity. Biomed Pharmacother 2020; 129:110379. [PMID: 32563148 DOI: 10.1016/j.biopha.2020.110379] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 06/03/2020] [Accepted: 06/07/2020] [Indexed: 01/17/2023] Open
Abstract
Triptolide (TP), as the main component of Tripterygium Wilfordii (TW), can induce obvious liver injury when exerting the therapeutic effect. However, in our previous study, Catalpol (CAT), the main active ingredient of Rehmannia Glutinosa (RG), was shown to increase the drug clearance rate of TP and to attenuate TP-induced hepatotoxicity. Thus the present study aims to address the roles of phase I and II metabolic enzymes and the nuclear receptors in the detoxification process of TP, to analyze the mechanism of CAT reducing hepatotoxicity. For this purpose, SD rats and human liver cell line L-02 and HepG2 cells were selected, and treated with TP or the combination of TP and CAT in our study. Then the effect of CAT on detoxification of TP was analyzed, and the roles of phase I metabolic enzymes cytochrome P450 3A2/4 (CYP3A2/4) and phase II metabolic enzyme UDP-glucuronosyltransferase 1A6 (UGT1A6) and their related nuclear receptor regulations were evaluated. It was found that TP inhibited the transcription of CYP3A2/4. And through the constitutive androstane receptor (CAR) pathway, CAT not only significantly changed this inhibition and increased the expression of CYP3A2/4 but also increased the expression of CYP2C9, both of which are phase I detoxification enzymes of TP. And with the gene-silenced experiment, it was confirmed that this regulation was CAR-dependent. We also found that CAT could continue to exert a certain protective effect after CAR was silenced, with UGT1A6, the phase II detoxification enzyme of TP, significantly induced. And this was closely related to the enhanced transcriptional regulation of the nuclear factor erythroid 2-related factor 2 (NRF2) pathway. In conclusion, our results reveal that CAT can induce TP's phase I detoxification enzymes CYP3A2/4 and CYP2C9 through the CAR pathway, and induce TP's phase II detoxification enzyme UGT1A6 via the NRF2 pathway when CAR is strongly inhibited. And this coordinate regulation of CAT may be an important source of the effect for CAT to increase TP metabolic conversion and reduce TP hepatotoxicity.
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Affiliation(s)
- Ling Fu
- The First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Lingling Zhou
- Jiangsu Provincial Key Laboratory of Pharmacology and Safety Evaluation of Material Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Shan Geng
- Jiangsu Provincial Key Laboratory of Pharmacology and Safety Evaluation of Material Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Sichuan Kelun Pharmaceutical CO., LTD., Chengdu 610071, China
| | - Ming Li
- The First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Wei Lu
- Jiangsu Provincial Key Laboratory of Pharmacology and Safety Evaluation of Material Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Yan Lu
- The First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing 210023, China; Department of Neurology, Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, Nanjing 210001, China
| | - Zhe Feng
- The First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Xueping Zhou
- The First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing 210023, China.
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Yuan X, Lu H, Zhao A, Ding Y, Min Q, Wang R. Transcriptional regulation of CYP3A4 by nuclear receptors in human hepatocytes under hypoxia. Drug Metab Rev 2020; 52:225-234. [PMID: 32270716 DOI: 10.1080/03602532.2020.1733004] [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] [Indexed: 02/08/2023]
Abstract
The human hepatic cytochrome P-450 3A4 (CYP3A4), recognized as a multifunctional enzyme, has a wide range of substrates including commonly used drugs. Previous investigations demonstrated that the expression of CYP3A4 in human hepatocytes could be regulated by some nuclear receptors (NRs) at transcriptional level under diverse situations. The significance of oxygen on CYP3A4-mediated metabolism seems notable while the regulatory mode of CYP3A4 in the particular case still remains elusive. Recently, striking evidence has emerged that both CYP3A4 and its regulator NR could be inhibited by exposure to hypoxia. Therefore, it is of great importance to elucidate whether and how these NRs act in the transcriptional regulation of CYP3A4 in human hepatocytes under hypoxic conditions. In this review, we mainly summarized transcriptional regulation of the pivotal enzyme CYP3A4 by NRs and explored the possible regulatory pathways of CYP3A4 via these major NRs under hypoxia, expecting to provide favorable evidence for further clinical guidance under such pathological situations.
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Affiliation(s)
- Xuechun Yuan
- Key Laboratory of the Plateau Environmental Damage Control, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China.,College of Pharmacy, Lanzhou University, Lanzhou, China
| | - Hui Lu
- Key Laboratory of the Plateau Environmental Damage Control, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Anpeng Zhao
- Key Laboratory of the Plateau Environmental Damage Control, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Yidan Ding
- Key Laboratory of the Plateau Environmental Damage Control, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China.,College of Pharmacy, Lanzhou University, Lanzhou, China
| | - Qiong Min
- Pharmacy department, Gansu Provincial Cancer Hospital, Lanzhou, China
| | - Rong Wang
- Key Laboratory of the Plateau Environmental Damage Control, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China.,College of Pharmacy, Lanzhou University, Lanzhou, China
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Rigalli JP, Reichel M, Reuter T, Tocchetti GN, Dyckhoff G, Herold-Mende C, Theile D, Weiss J. The pregnane X receptor (PXR) and the nuclear receptor corepressor 2 (NCoR2) modulate cell growth in head and neck squamous cell carcinoma. PLoS One 2018; 13:e0193242. [PMID: 29470550 PMCID: PMC5823449 DOI: 10.1371/journal.pone.0193242] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 02/07/2018] [Indexed: 01/19/2023] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is the sixth most frequent cancer worldwide. The pregnane X receptor (PXR) is a nuclear receptor regulating several target genes associated with cancer malignancy. We here demonstrated a significant effect of PXR on HNSCC cell growth, as evidenced in PXR knock-down experiments. PXR transcriptional activity is more importantly regulated by the presence of coactivators and corepressors than by PXR protein expression. To date, there is scarce information on the regulation of PXR in HNSCC and on its role in the pathogenesis of this disease. Coactivator and corepressor expression was screened through qRT-PCR in 8 HNSCC cell lines and correlated to PXR activity, determined by using a reporter gene assay. All cell lines considerably expressed all the cofactors assessed. PXR activity negatively correlated with nuclear receptor corepressor 2 (NCoR2) expression, indicating a major role of this corepressor in PXR modulation and suggesting its potential as a surrogate for PXR activity in HNSCC. To test the association of NCoR2 with the malignant phenotype, a subset of three cell lines was transfected with an over-expression plasmid for this corepressor. Subsequently, cell growth and chemoresistance assays were performed. To elucidate the mechanisms underlying NCoR2 effects on cell growth, caspase 3/7 activity and protein levels of cleaved caspase 3 and PARP were evaluated. In HNO97 cells, NCoR2 over-expression decreased cell growth, chemoresistance and increased cleaved caspase 3 levels, caspase activity and cleaved PARP levels. On the contrary, in HNO124 and HNO210 cells, NCoR2 over-expression increased cell growth, drug resistance and decreased cleaved caspase 3 levels, caspase activity and cleaved PARP levels. In conclusion, we demonstrated a role of PXR and NCoR2 in the modulation of cell growth in HNSCC. This may contribute to a better understanding of the highly variable HNSCC therapeutic response.
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Affiliation(s)
- Juan Pablo Rigalli
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Heidelberg, Germany
| | - Matthias Reichel
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Heidelberg, Germany
| | - Tasmin Reuter
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Heidelberg, Germany
| | - Guillermo Nicolás Tocchetti
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Heidelberg, Germany
- Institute of Experimental Physiology (IFISE-CONICET), Rosario, Argentina
| | - Gerhard Dyckhoff
- Molecular Cell Biology Group, Department of Otorhinolaryngology, Head and Neck Surgery, University of Heidelberg, Heidelberg, Germany
| | - Christel Herold-Mende
- Molecular Cell Biology Group, Department of Otorhinolaryngology, Head and Neck Surgery, University of Heidelberg, Heidelberg, Germany
- Division of Neurosurgical Research, Department of Neurosurgery, University of Heidelberg, Heidelberg, Germany
| | - Dirk Theile
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Heidelberg, Germany
| | - Johanna Weiss
- Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Heidelberg, Germany
- * E-mail:
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Chang HY, Chen CJ, Ma WC, Cheng WK, Lin YN, Lee YR, Chen JJ, Lim YP. Modulation of pregnane X receptor (PXR) and constitutive androstane receptor (CAR) activation by ursolic acid (UA) attenuates rifampin-isoniazid cytotoxicity. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2017; 36:37-49. [PMID: 29157826 DOI: 10.1016/j.phymed.2017.09.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 06/30/2017] [Accepted: 09/24/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Interactions between transcriptional inducers of cytochrome P450 (CYP450) enzymes and therapeutic drugs may be prevented by antagonizing the activation of a nuclear receptor (NR), pregnane X receptor (PXR, NR1I2), thus improving therapeutic efficacy. PURPOSE In the present study, we aim to identify that ursolic acid (UA), a widely distributed pentacyclic triterpene, may act as an effective antagonist of PXR and its sister NR receptor, constitutive androstane receptor (CAR, NR1I3). METHODS The hepatocellular carcinoma cell line, HepG2, was used to evaluate the promoter activity of PXR and CAR target genes, CYP3A4 and CYP2B6, respectively. Catalytic activities, mRNA, and protein expression of CYP3A4 and CYP2B6 were evaluated in a differentiated HepaRG cell line. Coregulation of PXR with coregulators on CYP3A4 promoter response elements was also been characterized. RESULTS Transient transfection assays showed that UA effectively attenuated CYP3A4 and CYP2B6 promoter activities mediated by rifampin (RIF, human PXR agonist) and CITCO (human CAR agonist). These inhibitory effects were well correlated with the expression and catalytic activities of CYP3A4 and CYP2B6. Furthermore, the interaction of co-regulators with PXR and the transcriptional complexes in the CYP3A4 promoter activity and CYP3A4 promoter xenobiotic response element (everted repeat 6, ER6), respectively, were disrupted in the presence of UA. UA showed an antagonistic effect against PXR, and reversed the cytotoxic effects of isoniazid (INH) induced by RIF. Taken together, these results show that UA inhibits the transactivation effects of PXR and CAR, and reduces the expression and function of CYP3A4 and CYP2B6. CONCLUSION The present study suggests that UA could be a powerful agent for reducing potentially dangerous interactions between transcriptional inducers of CYP enzymes and therapeutic drugs.
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Affiliation(s)
- Hsiao-Yun Chang
- Department of Biotechnology, Asia University, Taichung, Taiwan
| | - Chao-Jung Chen
- School of Chinese Medicine, China Medical University, Taichung, Taiwan; Proteomics Core Laboratory, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Wei-Chih Ma
- Department of Pharmacy, College of Pharmacy, China Medical University, Taichung, Taiwan
| | - Wai-Kok Cheng
- Department of Pharmacy, College of Pharmacy, China Medical University, Taichung, Taiwan
| | - Yen-Ning Lin
- Department of Pharmacy, College of Pharmacy, China Medical University, Taichung, Taiwan
| | - Ying-Ray Lee
- Translational Medicine Research Center, Chia-Yi Christian Hospital, Chiayi, Taiwan
| | - Jih-Jung Chen
- Faculty of Pharmacy, School of Pharmaceutical Sciences, National Yang Ming University, Taipei, Taiwan
| | - Yun-Ping Lim
- Department of Pharmacy, College of Pharmacy, China Medical University, Taichung, Taiwan; Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan; Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.
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Lin YN, Chen CJ, Chang HY, Cheng WK, Lee YR, Chen JJ, Lim YP. Oleanolic Acid-Mediated Inhibition of Pregnane X Receptor and Constitutive Androstane Receptor Attenuates Rifampin-Isoniazid Cytotoxicity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:8606-8616. [PMID: 28945086 DOI: 10.1021/acs.jafc.7b02696] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Interactions between transcriptional inducers of cytochrome P450 (CYP450) and pharmacological agents might decrease drug efficacy and induce side effects. Such interactions could be prevented using an antagonist of the pregnane X receptor (PXR) and constitutive androstane receptor (CAR). Here, we aimed to determine the antagonistic effect of oleanolic acid (OA) on PXR and CAR. OA attenuated the promoter activities, expressions, and enzyme catalytic activities of CYP3A4 and CYP2B6 mediated by rifampin (RIF) and CITCO. Moreover, OA displayed species specificity for rodent PXR. Interaction of coregulators with PXR and transcriptional complexes on the CYP3A4 promoter was disrupted by OA. Additionally, OA reversed the cytotoxic effects of isoniazid induced by RIF. These data demonstrate that OA inhibited the transactivation of PXR and CAR, reduced the expression and function of CYP3A4 and CYP2B6, and may therefore serve as an effective agent for reducing probability adverse interactions between transcriptional inducers of CYP450 and therapeutic drugs.
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Affiliation(s)
- Yen-Ning Lin
- Department of Pharmacy, College of Pharmacy, China Medical University , Taichung 40402, Taiwan
| | - Chao-Jung Chen
- Proteomics Core Laboratory, Department of Medical Research, China Medical University Hospital , Taichung 40402, Taiwan
- School of Chinese Medicine, China Medical University , Taichung 40402, Taiwan
| | - Hsiao-Yun Chang
- Department of Biotechnology, Asia University , Taichung 41354, Taiwan
| | - Wai-Kok Cheng
- Department of Pharmacy, College of Pharmacy, China Medical University , Taichung 40402, Taiwan
| | - Ying-Ray Lee
- Translational Medicine Research Center, Chia-Yi Christian Hospital , Chiayi 60002, Taiwan
| | - Jih-Jung Chen
- Faculty of Pharmacy, School of Pharmaceutical Sciences, National Yang Ming University , Taipei, Taiwan
| | - Yun-Ping Lim
- Department of Pharmacy, College of Pharmacy, China Medical University , Taichung 40402, Taiwan
- Department of Internal Medicine, China Medical University Hospital , Taichung 40402, Taiwan
- Department of Medical Research, China Medical University Hospital , Taichung 40402, Taiwan
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Zhang X, Ma Z, Liang Q, Tang X, Hu D, Liu C, Tan H, Xiao C, Zhang B, Wang Y, Gao Y. Tanshinone IIA exerts protective effects in a LCA-induced cholestatic liver model associated with participation of pregnane X receptor. JOURNAL OF ETHNOPHARMACOLOGY 2015; 164:357-367. [PMID: 25660334 DOI: 10.1016/j.jep.2015.01.047] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 01/10/2015] [Accepted: 01/15/2015] [Indexed: 06/04/2023]
Abstract
Tanshinone IIA (Tan IIA) is one of the main natural active ingredients purified from Salvia miltiorrhiza radix, which has long been used in clinical practice in China to treat diseases including liver fibrosis, Alzheimer׳s disease, and cardiovascular diseases. Tan IIA has hepatoprotective properties, and is an efficacious PXR agonist. Our study was designed to observe the function and mechanism of the hepatoprotective properties of Tan IIA. HepG2 cells were used to investigate the vitrol effects of Tan IIA on PXR and CYP3A4. Gut-formed LCA is hepatotoxic, and has been implicated in the pathogenesis of cholestatic diseases. To further investigate the hepatoprotective mechanisms of Tan IIA against LCA-induced cholestasis in vivo, we choose the normal mice and siRNA-treated mice. The in vitro study demonstrated that the effect of Tan IIA on CYP3A4 was mediated by transactivation of PXR in a dose- and time-dependent manner. The in vivo experiments using PXR siRNA revealed that Tan IIA could protect against LCA-induced hepatotoxicity and cholestasis in a dose-dependent manner. These effects were partially caused by the upregulation of PXR, as well as Cyp3a11, Cyp3a13, and Mdr1, which are the enzymes responsible for LCA metabolism. This is the first report showing that the hepatoprotective effects of Tan IIA are partly mediated by PXR.
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Affiliation(s)
- Xianxie Zhang
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Zengchun Ma
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Qiande Liang
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Xianglin Tang
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Donghua Hu
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Canglong Liu
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Hongling Tan
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Chengrong Xiao
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Boli Zhang
- Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
| | - Yuguang Wang
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China.
| | - Yue Gao
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China.
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10
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Allyl isothiocyanate (AITC) inhibits pregnane X receptor (PXR) and constitutive androstane receptor (CAR) activation and protects against acetaminophen- and amiodarone-induced cytotoxicity. Arch Toxicol 2014; 89:57-72. [DOI: 10.1007/s00204-014-1230-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Accepted: 03/18/2014] [Indexed: 01/22/2023]
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11
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Tsuchiya H, Matsunaga T, Aikawa K, Kamada N, Nakamura K, Ichikawa H, Sasaki K, Ohmori S. Evaluation of human embryonic stem cell-derived hepatocyte-like cells for detection of CYP1A inducers. Drug Metab Pharmacokinet 2012; 27:598-604. [PMID: 22673034 DOI: 10.2133/dmpk.dmpk-12-rg-017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
There is a great deal of interest in differentiation of human embryonic stem cells (hESCs) into hepatocyte-like cells for application in pharmaceutical screening. Cytochrome P450 (CYP) 1A is involved in the metabolic activation of procarcinogenic compounds as well as in detoxification of drugs. We differentiated hESCs into hepatocyte-like cells (hESC-derived hepatocyte-like cells) and examined whether CYP1A was induced in these cells by typical inducers of CYP1A. hESC-derived hepatocyte-like cells expressed albumin, α-fetoprotein, CYP3A4, CYP3A7, CYP1A1, CYP1A2, and UDP-glucuronyl transferase (UGT) 1A1 mRNA. The levels of CYP1A1, CYP1A2, and UGT1A1 mRNA expression were increased by omeprazole and 3-methylcholanthrene. Furthermore, the enzyme activity of CYP1A was also increased by these compounds. In conclusion, hESC-derived hepatocyte-like cells are available for the detection of CYP1A inducers.
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Affiliation(s)
- Hiroyuki Tsuchiya
- Department of Pharmacy, Shinshu University Hospital, Matsumoto, Japan
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Matsunaga T, Maruyama M, Matsubara T, Nagata K, Yamazoe Y, Ohmori S. Mechanisms of CYP3A induction by glucocorticoids in human fetal liver cells. Drug Metab Pharmacokinet 2012; 27:653-7. [PMID: 22673009 DOI: 10.2133/dmpk.dmpk-12-nt-018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Human fetal liver (HFL) cells express major drug metabolic enzymes CYP3A4, CYP3A5 and CYP3A7. In the fetal hepatocytes, betamethasone and dexamethasone (DEX) markedly enhanced the expression levels of CYP3A4 and CYP3A7 mRNAs and slightly increased the expression level of CYP3A5 mRNA. Interestingly, a high correlation between the CYP3A induction ability and the intensity of anti-inflammatory effect was observed. Human glucocorticoid receptor (GR)-small interfering RNA clearly attenuated the expression level of GR mRNA, and diminished the DEX-stimulated CYP3A4, CYP3A5 and CYP3A7 expression in HFL cells. These findings indicate that GR mediates the induction of CYP3A4 and CYP3A7 expression in human fetal hepatocytes as well as the CYP3A5.
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