Abstract |
Expression of genes involved in absorption, distribution, metabolism, and excretion (ADME) of drugs is impaired in pathophysiologic conditions such as cholestasis and inflammation. The mechanisms of ADME gene down-regulation remain unclear. In our previous study, strongly elevated levels of microRNAs ( miRNA) miR-21, miR-34a, and miR-130b in cholestatic liver and of miR-21 and miR-130b during inflammation were observed. Using HepaRG cells, which retain many functional characteristics of human hepatocytes, we investigated the potential of these miRNAs to down-regulate ADME genes. Cells were transfected with the corresponding miRNA mimics, chemically modified double-stranded RNAs that mimic endogenous miRNAs, followed by mRNA profiling by quantitative reverse-transcription polymerase chain reaction. Activities of six cytochrome P450 enzymes ( CYP1A2, CYP2B6, CYP2C8, CYP2C9, CYP2C19, and CYP3A4) were determined with a liquid chromatography with tandem mass spectrometric cocktail assay. Although miR-21 and miR-34a showed few effects, transfection of miR-130b led to significantly lower expression of nuclear receptors constitutive androstane receptor (CAR) and farnesoid X receptor (FXRα), the CYPs 1A1, 1A2, 2A6, 2C8, 2C9, and 2C19, as well as GSTA2. Furthermore, miR-130b negatively affected activity levels of all measured P450s by at least 30%. Reporter gene assays employing the CYP2C9 3'-untranslated region (3'-UTR) confirmed direct regulation by miR-130b. These data support miR-130b as a potential negative regulator of drug metabolism by directly and/or indirectly affecting the expression of several ADME genes. This may be of relevance in pathophysiologic conditions such as cholestasis and inflammation, which are associated with increased miR-130b expression.
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Authors | Jessica K Rieger, Sandra Reutter, Ute Hofmann, Matthias Schwab, Ulrich M Zanger |
Journal | Drug metabolism and disposition: the biological fate of chemicals
(Drug Metab Dispos)
Vol. 43
Issue 6
Pg. 884-8
(Jun 2015)
ISSN: 1521-009X [Electronic] United States |
PMID | 25802328
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2015 by The American Society for Pharmacology and Experimental Therapeutics. |
Chemical References |
- 3' Untranslated Regions
- MIRN130 microRNA, human
- MicroRNAs
- RNA, Messenger
- RNA, Small Interfering
- Recombinant Fusion Proteins
- CYP2C9 protein, human
- Cytochrome P-450 CYP2C9
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Topics |
- 3' Untranslated Regions
- Cell Line
- Cholestasis, Intrahepatic
(enzymology, immunology, metabolism)
- Computational Biology
- Cytochrome P-450 CYP2C9
(chemistry, genetics, metabolism)
- Enzyme Repression
- Genes, Reporter
- Hepatitis
(enzymology, immunology, metabolism)
- Hepatocytes
(enzymology, immunology, metabolism)
- Humans
- MicroRNAs
(antagonists & inhibitors, chemistry, metabolism)
- Models, Biological
- RNA Interference
- RNA, Messenger
(metabolism)
- RNA, Small Interfering
- Recombinant Fusion Proteins
(chemistry, metabolism)
- Up-Regulation
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