Evidence map›Paper›PMID 16042669›Full record

SynthesisBritish journal of clinical pharmacology2005

Meta-analysis of the influence of MDR1 C3435T polymorphism on digoxin pharmacokinetics and MDR1 gene expression.

Balram Chowbay, Huihua Li, Machin David, Yin Bun Cheung, Edmund J D Lee

Open access · greenAbstract readMeta-Analysis
In one paragraph

Synthesis in British journal of clinical pharmacology, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 3 pooled it
4.5field-weighted citation impact, top 5% 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

29 citing papers in PubMed, 3 syntheses or guidelines pooled it, 118 citations in OpenAlex.

  1. Pooled it
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  6. Article
  7. CommonTranslational and clinical pharmacology · 2022
    Article
  8. Article
  9. Pharmacogenomics Informs Cardiovascular Pharmacotherapy.Methods in molecular biology (Clifton, N.J.) · 2022
    Article
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  12. Review
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  16. Article
  17. The role of genetics in drug dosing.Pediatric nephrology (Berlin, Germany) · 2012
    Review
  18. A case for pharmacogenomics in management of cardiac arrhythmias.Indian pacing and electrophysiology journal · 2012
    Article
  19. Review
  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

5 authors at 2 institutions in 2 countries.

Balram ChowbayLaboratory of Clinical Pharmacology, Division of Clinical Trials and Epidemiological Sciences, National Cancer Centre, Singapore. ctebal@nccs.com.sg
Huihua Li
Machin David
Yin Bun Cheung
Edmund J D Lee
National Cancer Centre Singapore · SGNational University of Singapore · SG

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsStudies revealing conflicting results of the functional significance of MDR1 exon 26 C3435T SNP on the disposition of digoxin in different ethnic groups led us to perform a meta-analysis on published data investigating the influence of C3435T SNP on the pharmacokinetics of digoxin and the expression of MDR1.

methodsMeta-analysis was performed on data from published studies investigating the influence of MDR1 C3435T SNP on digoxin pharmacokinetics, as well as MDR1 expression in Caucasian and Japanese populations. The following outcomes were included: exposures to digoxin measured by area under the concentration-time curve and maximum concentration, the mean intestinal MDR1 mRNA expression and P-gp expression in the absence of digoxin administration.

resultsThe overall results of the meta-analysis in Caucasian and Japanese subjects suggested no major influence of the C3435T SNP on exposure levels of digoxin as determined by AUC(0-4 h) or AUC(0-24 h) although C(max) values for digoxin were lower in wild-type (CC) subjects compared with subjects harbouring TT genotypes. Subgroup analysis by ethnic populations showed the oral availability of digoxin to be lower in wild-type Caucasian populations compared with wild-type Japanese subjects. No causal relationships were detected between the C3435T SNP and MDR1 mRNA or protein expression.

conclusionsOur meta-analysis of available studies indicates that the synonymous MDR1 C3435T SNP does not affect the pharmacokinetics of digoxin and the expression of MDR1 mRNA. Future studies should focus on the impact of MDR1 haplotypes on the pharmacokinetics of MDR1 substrates rather than the C3435T SNP alone.

Indexed as

Administration, OralArea Under CurveDigoxinEnzyme InhibitorsGene Expression RegulationGenes, MDRGenotypeHumansJapanPolymorphism, Single NucleotideRNA, MessengerWhite PeopleDigoxinEnzyme InhibitorsRNA, Messenger

Identifiers

PMID16042669
PMCPMC1884933
OpenAlexW1966368641

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.