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Smutny T, Dusek J, Hyrsova L, Nekvindova J, Horvatova A, Micuda S, Gerbal-Chaloin S, Pavek P. The 3'-untranslated region contributes to the pregnane X receptor (PXR) expression down-regulation by PXR ligands and up-regulation by glucocorticoids. Acta Pharm Sin B 2020; 10:136-152. [PMID: 31998607 PMCID: PMC6976988 DOI: 10.1016/j.apsb.2019.09.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 09/10/2019] [Accepted: 09/11/2019] [Indexed: 12/16/2022] Open
Abstract
Pregnane X receptor (PXR) is the major regulator of xenobiotic metabolism. PXR itself is controlled by various signaling molecules including glucocorticoids. Moreover, negative feed-back regulation has been proposed at the transcriptional level. We examined the involvement of the 3'-untranslated region (3'-UTR) of NR1I2 mRNA and microRNAs in PXR- and glucocorticoid receptor (GR)-mediated regulation of NR1I2 gene expression. PXR ligands were found to significantly downregulate NR1I2 mRNA expression in a set of 14 human hepatocyte cultures. Similarly, PXR was downregulated by PCN in the C57/BL6 mice liver. In mechanistic studies with the full-length 3'-UTR cloned into luciferase reporter or expression vectors, we showed that the 3'-UTR reduces PXR expression. From the miRNAs tested, miR-18a-5p inhibited both NR1I2 expression and CYP3A4 gene induction. Importantly, we observed significant upregulation of miR-18a-5p expression 6 h after treatment with the PXR ligand rifampicin, which indicates a putative mechanism underlying NR1I2 negative feed-back regulation in hepatic cells. Additionally, glucocorticoids upregulated NR1I2 expression not only through the promoter region but also via 3'-UTR regulation, which likely involves downregulation of miR-18a-5p. We conclude that miR-18a-5p is involved in the down-regulation of NR1I2 expression by its ligands and in the upregulation of NR1I2 mRNA expression by glucocorticoids in hepatic cells.
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Key Words
- 3′-UTR, 3′-untranslated region
- CAR, constitutive androstane receptor
- CYP3A4, cytochrome P450 3A4
- Cytochrome P450 3A4
- DEX, dexamethasone
- DMEs, drug metabolizing enzymes
- DMSO, dimethyl sulfoxide
- ER, estrogen receptor
- GRα, glucocorticoid receptor α
- Gene expression
- Gluc, Gaussia luciferase
- Glucocorticoid
- LBD, ligand binding domain
- MRE, miRNA-response element
- MicroRNA
- NR, nuclear receptor
- PB, phenobarbital
- PCN, pregnenolone 16α-carbonitrile
- PHHs, primary human hepatocytes
- PPARα, peroxisome proliferator-activated receptor α
- PXR, pregnane X receptor
- Pregnane X receptor
- RXRα, retinoid X receptor α
- Regulation
- Rif, rifampicin
- SEAP, secreted alkaline phosphatase
- miRNA, microRNA
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Affiliation(s)
- Tomas Smutny
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove CZ-500 05, Czech Republic
| | - Jan Dusek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove CZ-500 05, Czech Republic
| | - Lucie Hyrsova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove CZ-500 05, Czech Republic
| | - Jana Nekvindova
- Institute of Clinical Biochemistry and Diagnostics, University Hospital Hradec Kralove, Hradec Kralove CZ-500 05, Czech Republic
| | - Alzbeta Horvatova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove CZ-500 05, Czech Republic
| | - Stanislav Micuda
- Department of Pharmacology, Faculty of Medicine in Hradec Kralove, Charles University, Hradec Kralove CZ-500 03, Czech Republic
| | | | - Petr Pavek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove CZ-500 05, Czech Republic
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Dusek J, Skoda J, Holas O, Horvatova A, Smutny T, Linhartova L, Hirsova P, Kucera O, Micuda S, Braeuning A, Pavek P. Stilbene compound trans-3,4,5,4´-tetramethoxystilbene, a potential anticancer drug, regulates constitutive androstane receptor (Car) target genes, but does not possess proliferative activity in mouse liver. Toxicol Lett 2019; 313:1-10. [PMID: 31170421 DOI: 10.1016/j.toxlet.2019.05.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 05/21/2019] [Accepted: 05/29/2019] [Indexed: 01/06/2023]
Abstract
The constitutive androstane receptor(CAR) activation is connected with mitogenic effects leading to liver hyperplasia and tumorigenesis in rodents. CAR activators, including phenobarbital, are considered rodent non-genotoxic carcinogens. Recently, trans-3,4,5,4´-tetramethoxystilbene(TMS), a potential anticancer drug (DMU-212), have been shown to alleviate N-nitrosodiethylamine/phenobarbital-induced liver carcinogenesis. We studied whether TMS inhibits mouse Car to protect from the PB-induced tumorigenesis. Unexpectedly, we identified TMS as a murine CAR agonist in reporter gene experiments, in mouse hepatocytes, and in C57BL/6 mice in vivo. TMS up-regulated Car target genes Cyp2b10, Cyp2c29 and Cyp2c55 mRNAs, but down-regulated expression of genes involved in gluconeogenesis and lipogenesis. TMS did not change or down-regulate genes involved in liver proliferation or apoptosis such as Mki67, Foxm1, Myc, Mcl1, Pcna, Bcl2, or Mdm2, which were up-regulated by another Car ligand TCPOBOP. TMS did not increase liver weight and had no significant effect on Ki67 and Pcna labeling indices in mouse liver in vivo. In murine hepatic AML12 cells, we confirmed a Car-independent proapoptotic effect of TMS. We conclude that TMS is a Car ligand with limited effects on hepatocyte proliferation, likely due to promoting apoptosis in mouse hepatic cells, while controlling Car target genes involved in xenobiotic and endobiotic metabolism.
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Affiliation(s)
- Jan Dusek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovskeho 1203, Hradec Kralove, 500 05, Czech Republic
| | - Josef Skoda
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovskeho 1203, Hradec Kralove, 500 05, Czech Republic
| | - Ondrej Holas
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Charles University, Heyrovskeho 1203, Hradec Kralove, 500 05, Czech Republic
| | - Alzbeta Horvatova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovskeho 1203, Hradec Kralove, 500 05, Czech Republic
| | - Tomas Smutny
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovskeho 1203, Hradec Kralove, 500 05, Czech Republic
| | - Lenka Linhartova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovskeho 1203, Hradec Kralove, 500 05, Czech Republic
| | - Petra Hirsova
- Division of Gastroenterology and Hepatology, Mayo Clinic, 200 First St. SW, Rochester, MN 55905, USA
| | - Otto Kucera
- Department of Physiology, Charles University, Faculty of Medicine in Hradec Kralove, Simkova 870, 500 03 Hradec Kralove, Czech Republic
| | - Stanislav Micuda
- Department of Pharmacology, Charles University, Faculty of Medicine in Hradec Kralove, Simkova 870, 500 03 Hradec Kralove, Czech Republic
| | - Albert Braeuning
- Department of Food Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589, Berlin, Germany; Department of Toxicology, University of Tübingen, Wilhelmstr. 56, 72074, Tübingen, Germany
| | - Petr Pavek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University, Heyrovskeho 1203, Hradec Kralove, 500 05, Czech Republic.
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Horvatova A, Utaipan T, Otto AC, Zhang Y, Gan-Schreier H, Pavek P, Pathil A, Stremmel W, Chamulitrat W. Ursodeoxycholyl lysophosphatidylethanolamide negatively regulates TLR-mediated lipopolysaccharide response in human THP-1-derived macrophages. Eur J Pharmacol 2018; 825:63-74. [PMID: 29475064 DOI: 10.1016/j.ejphar.2018.02.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 02/15/2018] [Accepted: 02/19/2018] [Indexed: 11/26/2022]
Abstract
The bile acid-phospholipid conjugate ursodeoxycholyl oleoyl-lysophophatidylethanolamide (UDCA-18:1LPE) is an anti-inflammatory and anti-fibrotic agent as previously shown in cultured hepatocytes and hepatic stellate cells as well as in in vivo models of liver injury. We hypothesize that UDCA-18:1LPE may directly inhibit the activation of immune cells. We found that UDCA-18:1LPE was capable of inhibiting the migration of phorbol ester-differentiated human THP-1 cells. We examined anti-inflammatory activity of UDCA-18:1LPE during activation of THP1-derived macrophages. Treatment of these macrophages by bacterial lipopolysaccharide (LPS) for 24 h induced the release of pro-inflammatory cytokines TNF-α, IL-6 and IL-1β. This release was markedly inhibited by pretreatment with UDCA-18:1LPE by ~ 65-90%. Derivatives with a different fatty-acid chain in LPE moiety also exhibited anti-inflammatory property. Western blotting and indirect immunofluorescence analyses revealed that UDCA-18:1LPE attenuated the expression of phosphorylated p38, MKK4/MKK7, JNK1/2, and c-Jun as well as nuclear translocation of NF-κB by ~ 22-86%. After LPS stimulation, the Toll-like receptor adaptor proteins, myeloid differentiation factor 88 and TNF receptor associated factor 6, were recruited into lipid rafts and UDCA-18:1LPE inhibited this recruitment by 22% and 58%, respectively. Moreover, LPS treatment caused a decrease of the known cytoprotective lysophosphatidylcholine species containing polyunsaturated fatty acids by 43%, and UDCA-18:1LPE co-treatment reversed this decrease. In conclusion, UDCA-18:1LPE and derivatives inhibited LPS inflammatory response by interfering with Toll-like receptor signaling in lipid rafts leading to an inhibition of MAPK and NF-κB activation. These conjugates may represent a class of lead compounds for development of anti-inflammatory drugs.
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Affiliation(s)
- Alzbeta Horvatova
- Department of Internal Medicine IV, University of Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University in Prague, Heyorovskeho 1203, 500 05 Hradec Kralove, Czech Republic
| | - Tanyarath Utaipan
- Department of Pre-Clinic, Faculty of Sciences and Technology, Prince of Songkla University, Pattani Campus, 94000 Pattani, Thailand
| | - Ann-Christin Otto
- Department of Internal Medicine IV, University of Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Yuling Zhang
- Department of Internal Medicine IV, University of Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Hongying Gan-Schreier
- Department of Internal Medicine IV, University of Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Petr Pavek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University in Prague, Heyorovskeho 1203, 500 05 Hradec Kralove, Czech Republic
| | - Anita Pathil
- Department of Internal Medicine IV, University of Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Wolfgang Stremmel
- Department of Internal Medicine IV, University of Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany
| | - Walee Chamulitrat
- Department of Internal Medicine IV, University of Heidelberg, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany.
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Carazo A, Hyrsova L, Dusek J, Chodounska H, Horvatova A, Berka K, Bazgier V, Gan-Schreier H, Chamulitrat W, Kudova E, Pavek P. Acetylated deoxycholic (DCA) and cholic (CA) acids are potent ligands of pregnane X (PXR) receptor. Toxicol Lett 2016; 265:86-96. [PMID: 27871908 DOI: 10.1016/j.toxlet.2016.11.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 11/10/2016] [Accepted: 11/15/2016] [Indexed: 12/11/2022]
Abstract
The Pregnane X (PXR), Vitamin D (VDR) and Farnesoid X (FXR) nuclear receptors have been shown to be receptors of bile acids controlling their detoxification or synthesis. Chenodeoxycholic (CDCA) and lithocholic (LCA) acids are ligands of FXR and VDR, respectively, whereas 3-keto and acetylated derivates of LCA have been described as ligands for all three receptors. In this study, we hypothesized that oxidation or acetylation at position 3, 7 and 12 of bile acids DCA (deoxycholic acid), LCA, CA (cholic acid), and CDCA by detoxification enzymes or microbiome may have an effect on the interactions with bile acid nuclear receptors. We employed reporter gene assays in HepG2 cells, the TR-FRET assay with recombinant PXR and RT-PCR to study the effects of acetylated and keto bile acids on the nuclear receptors activation and their target gene expression in differentiated hepatic HepaRG cells. We demonstrate that the DCA 3,12-diacetate and CA 3,7,12-triacetate derivatives are ligands of PXR and DCA 3,12-diacetate induces PXR target genes such as CYP3A4, CYP2B6 and ABCB1/MDR1. In conclusion, we found that acetylated DCA and CA are potent ligands of PXR. Whether the acetylated bile acid derivatives are novel endogenous ligands of PXR with detoxification or physiological functions should be further studied in ongoing experiments.
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Affiliation(s)
- Alejandro Carazo
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University in Prague, Heyrovského 1203, Hradec Kralove CZ500 05, Czechia
| | - Lucie Hyrsova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University in Prague, Heyrovského 1203, Hradec Kralove CZ500 05, Czechia
| | - Jan Dusek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University in Prague, Heyrovského 1203, Hradec Kralove CZ500 05, Czechia
| | - Hana Chodounska
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, CZ160 00 Praha, Czechia
| | - Alzbeta Horvatova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University in Prague, Heyrovského 1203, Hradec Kralove CZ500 05, Czechia
| | - Karel Berka
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Palacky University in Olomouc, 17. listopadu 1131, Olomouc CZ779 00, Czechia
| | - Vaclav Bazgier
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Palacky University in Olomouc, 17. listopadu 1131, Olomouc CZ779 00, Czechia
| | - Hongying Gan-Schreier
- Department of Internal Medicine IV, Gastroenterology and Infectious Diseases, Im Neuenheimer Feld, Heidelberg, Germany
| | - Waleé Chamulitrat
- Department of Internal Medicine IV, Gastroenterology and Infectious Diseases, Im Neuenheimer Feld, Heidelberg, Germany
| | - Eva Kudova
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, CZ160 00 Praha, Czechia
| | - Petr Pavek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Charles University in Prague, Heyrovského 1203, Hradec Kralove CZ500 05, Czechia.
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