Evidence map›Paper›PMID 21913896›Full record

ArticleBritish journal of pharmacology2012

Effects of atorvastatin metabolites on induction of drug-metabolizing enzymes and membrane transporters through human pregnane X receptor.

E Hoffart, L Ghebreghiorghis, A K Nussler, W E Thasler, T S Weiss, M Schwab, O Burk

Open access · bronzeAbstract read
In one paragraph

Article in British journal of pharmacology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
4.5field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

22 citing papers in PubMed, 54 citations in OpenAlex.

  1. Trial
  2. Review
  3. Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Pregnane X Receptor and the Gut-Liver Axis: A Recent Update.Drug metabolism and disposition: the biological fate of chemicals · 2022
    Review
  11. Article
  12. Review
  13. Article
  14. Article
  15. The potential of Atorvastatin for chronic lung diseases therapy.Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society · 2020
    Review
  16. Article
  17. Natural substance rutin versus standard drug atorvastatin in a treatment of metabolic syndrome-like condition.Saudi pharmaceutical journal : SPJ : the official publication of the Saudi Pharmaceutical Society · 2019
    Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 5 institutions in 1 country.

E HoffartDr Margarete Fischer-Bosch-Institute of Clinical Pharmacology, Stuttgart and University of Tübingen, Tübingen, Germany.
L Ghebreghiorghis
A K Nussler
W E Thasler
T S Weiss
M Schwab
O Burk
Dr. Margarete Fischer-Bosch-Institute of Clinical Pharmacology · DECharité - Universitätsmedizin Berlin · DELudwig-Maximilians-Universität München · DEUniversity Hospital Regensburg · DEUniversity of Stuttgart · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeAtorvastatin metabolites differ in their potential for drug interaction because of differential inhibition of drug-metabolizing enzymes and transporters. We here investigate whether they exert differential effects on the induction of these genes via activation of pregnane X receptor (PXR) and constitutive androstane receptor (CAR). EXPERIMENTAL APPROACH: Ligand binding to PXR or CAR was analysed by mammalian two-hybrid assembly and promoter/reporter gene assays. Additionally, surface plasmon resonance was used to analyse ligand binding to CAR. Primary human hepatocytes were treated with atorvastatin metabolites, and mRNA and protein expression of PXR-regulated genes was measured. Two-hybrid co-activator interaction and co-repressor release assays were utilized to elucidate the molecular mechanism of PXR activation. KEY

resultsAll atorvastatin metabolites induced the assembly of PXR and activated CYP3A4 promoter activity. Ligand binding to CAR could not be proven. In primary human hepatocytes, the para-hydroxy metabolite markedly reduced or abolished induction of cytochrome P450 and transporter genes. While significant differences in co-activator recruitment were not observed, para-hydroxy atorvastatin demonstrated only 50% release of co-repressors. CONCLUSIONS AND IMPLICATIONS: Atorvastatin metabolites are ligands of PXR but not of CAR. Atorvastatin metabolites demonstrate differential induction of PXR target genes, which results from impaired release of co-repressors. Consequently, the properties of drug metabolites have to be taken into account when analysing PXR-dependent induction of drug metabolism and transport. The drug interaction potential of the active metabolite, para-hydroxy atorvastatin, might be lower than that of the parent compound.

Indexed as

Aryl Hydrocarbon HydroxylasesAtorvastatinCell Line, TumorConstitutive Androstane ReceptorCo-Repressor ProteinsCytochrome P-450 CYP2B6Cytochrome P-450 CYP3ACytochrome P-450 Enzyme SystemDrug InteractionsGenes, ReporterHepatocytesHep G2 CellsHeptanoic AcidsHumansLigandsMembrane Transport ProteinsAryl Hydrocarbon HydroxylasesAtorvastatinConstitutive Androstane ReceptorCo-Repressor ProteinsCYP2B6 protein, humanCYP3A4 protein, humanCytochrome P-450 CYP2B6Cytochrome P-450 CYP3ACytochrome P-450 Enzyme SystemHeptanoic AcidsLigandsMembrane Transport ProteinsOxidoreductases, N-DemethylatingPregnane X ReceptorPyrrolesReceptors, Cytoplasmic and NuclearReceptors, SteroidRNA, Messenger

Identifiers

PMID21913896
PMCPMC3372740
OpenAlexW1606705306

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.