Cited by 916Drug Transport and Resistance MechanismsPharmacogenetics and Drug MetabolismPeroxisome Proliferator-Activated Receptors

Regulation of multidrug resistance-associated protein 2 (ABCC2) by the nuclear receptors pregnane X receptor, farnesoid X-activated receptor, and constitutive androstane receptor

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Kast, Heidi R., Goodwin, Bryan, Tarr, Paul T., Jones, Stacey A., Anisfeld, Andrew M., Stoltz, Catherine M., Tontonoz, Peter, Kliewer, Steve +2 more·2002·Journal of Biological Chemistry

Abstract

The multidrug resistance-associated protein 2 (MRP2, ABCC2), mediates the efflux of several conjugated compounds across the apical membrane of the hepatocyte into the bile canaliculi. We identified MRP2 in a screen designed to isolate genes that are regulated by the farnesoid X-activated receptor (FXR, NR1H4). MRP2 mRNA levels were induced following treatment of human or rat hepatocytes with either naturally occurring (chenodeoxycholic acid) or synthetic (GW4064) FXR ligands. In addition, we have shown that MRP2 expression is regulated by the pregnane X receptor (PXR, NR1I2) and constitutive androstane receptor (CAR, NR1I3). Thus, treatment of rodent hepatocytes with PXR or CAR agonists results in a robust induction of MRP2 mRNA levels. The dexamethasone- and pregnenolone 16alpha-carbonitrile-dependent induction of MRP2 expression was not evident in hepatocytes derived from PXR null mice. In contrast, induction of MRP2 by phenobarbital, an activator of CAR, was comparable in wild-type and PXR null mice. An unusual 26-bp sequence was identified 440 bp upstream of the MRP2 transcription initiation site that contains an everted repeat of the AGTTCA hexad separated by 8 nucleotides (ER-8). PXR, CAR, and FXR bound with high affinity to this element as heterodimers with the retinoid X receptor alpha (RXRalpha, NR2B1). Luciferase reporter gene constructs containing 1 kb of the rat MRP2 promoter were prepared and transiently transfected into HepG2 cells. Luciferase activity was induced in a PXR-, CAR-, or FXR-dependent manner. Furthermore, the isolated ER-8 element was capable of conferring PXR, CAR, and FXR responsiveness on a heterologous thymidine kinase promoter. Mutation of the ER-8 element abolished the nuclear receptor response. These studies demonstrate that MRP2 is regulated by three distinct nuclear receptor signaling pathways that converge on a common response element in the 5'-flanking region of this gene.

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Authors
Kast, H. R., Goodwin, B., Tarr, P. T., Jones, S. A., Anisfeld, A. M., Stoltz, C. M., Tontonoz, P., Kliewer, S., Willson, T. M., & Edwards, P. A.
Affiliations
  • Howard Hughes Medical Institute (US)
  • GlaxoSmithKline (United States) (US)
Corresponding author
Edwards, Peter A.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2002-01
Volume
277
Issue
4
Pages
2908-2915
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2125457175
Cited by
916
References
63
Citations by year
2026: 10 · 2025: 18 · 2024: 11 · 2023: 23 · 2022: 31 · 2021: 21 · 2020: 22 · 2019: 27 · 2018: 22 · 2017: 21 · 2016: 23 · 2015: 20 · 2014: 33 · 2013: 43 · 2012: 44
FWCI
35.92
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Education
  • American Heart Association
  • National Institutes of Health (HL30568)
  • National Heart, Lung, and Blood Institute (HL3 0568, HL 68445, P01HL030568, R01HL068445)
Topics
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
Keywords
MRP2, pregnane X receptor, constitutive androstane receptor, nuclear receptor regulation, gene expression regulation, hepatocytes, retinoid X receptor alpha, chenodeoxycholic acid, GW4064, phenobarbital
MeSH terms
Pregnane X Receptor, Multidrug Resistance-Associated Protein 2, Constitutive Androstane Receptor, Receptor, Farnesoid X-Activated, Animals, Base Sequence, Bile Acids and Salts, Cell Line, Cell Nucleus, Cells, Cultured, DNA-Binding Proteins, Humans, Isoxazoles, Ligands, Liver, Models, Biological, Molecular Sequence Data, Nucleic Acid Hybridization, Phenobarbital, Promoter Regions, Genetic, Protein Binding, Receptors, Steroid, RNA, Messenger, Transcription Factors, Transcription, Genetic, Blotting, Northern, Signal Transduction, Transcriptional Activation, Genes, Reporter, Receptors, Cytoplasmic and Nuclear, Drug Resistance, Multiple, Protein Transport, Hepatocytes, Membrane Transport Proteins, ATP-Binding Cassette, Sub-Family C Proteins, Mice, Rats

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