Evidence map›Paper›PMID 19082874›Full record

ArticlePharmaceutical research2009

Prediction of the effects of genetic polymorphism on the pharmacokinetics of CYP2C9 substrates from in vitro data.

Makiko Kusama, Kazuya Maeda, Koji Chiba, Akinori Aoyama, Yuichi Sugiyama

Abstract readValidation Study
PubMed Publisher
In one paragraph

Article in Pharmaceutical research, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 2 pooled it
3.7field-weighted citation impact, top 8% 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

11 citing papers in PubMed, 2 syntheses or guidelines pooled it, 44 citations in OpenAlex.

  1. Guideline
  2. Guideline
  3. Trial
  4. Article
  5. Article
  6. Review
  7. Article
  8. Data Mining FAERS to Analyze Molecular Targets of Drugs Highly Associated with Stevens-Johnson Syndrome.Journal of medical toxicology : official journal of the American College of Medical Toxicology · 2015
    Article
  9. Article
  10. Article
  11. Cytochrome P450 2C9-CYP2C9.Pharmacogenetics and genomics · 2010
    Review
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

5 authors at 2 institutions in 1 country.

Makiko KusamaLaboratory of Pharmaceutical Regulatory Science, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
Kazuya Maeda
Koji Chiba
Akinori Aoyama
Yuichi Sugiyama
The University of Tokyo · JPKeio University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe *2 and *3 alleles of CYP2C9, with decreased enzymatic activity, are highly polymorphic and contribute to inter-individual differences in pharmacotherapy of CYP2C9 substrates. Here, we sought for a simplified theoretical method to predict the pharmacokinetic changes with minimal in vivo data.

methodsThe changes in clearances of CYP2C9 substrates in subjects with these alleles were quantitatively estimated by parameters from literature data: intrinsic metabolic clearance and the enzyme expression level of mutated CYP2C9, contribution of CYP2C9 to the CYP-mediated clearance (f (m2C9)), and the contribution of the dominant metabolic pathways to the total clearance (f (h)). To validate the accuracy of our prediction, the changes were compared to reported in vivo values.

resultsSufficient data were available for nine substrates: celecoxib, diclofenac, S-flurbiprofen, losartan, S-phenprocoumon, phenytoin, tolbutamide, torsemide, and S-warfarin. These predicted values, either using the intrinsic clearance specific to each substrate, or the averaged values (*2: 0.66, *3: 0.13, (ratio to *1)), correlated well with observed values (r (2) = 0.812, 0.786, respectively).

conclusionsThis theoretical method well estimated the quantitative changes in pharmacokinetics of CYP2C9 substrates in subjects with mutated alleles of CYP2C9. This can be applied to drug development even from the early clinical phases.

Indexed as

Models, BiologicalPharmacokineticsPolymorphism, GeneticAdministration, OralAryl Hydrocarbon HydroxylasesCytochrome P-450 CYP2C9Gene Expression Regulation, EnzymologicGenotypeHaplotypesHumansMetabolic Clearance RatePhenotypeReproducibility of ResultsSubstrate SpecificityAryl Hydrocarbon HydroxylasesCYP2C9 protein, humanCytochrome P-450 CYP2C9

Identifiers

PMID19082874
OpenAlexW2011089905

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.