Evidence map›Paper›PMID 15180340›Full record

ArticlePharmaceutical research2004

Predicting P-glycoprotein effects on oral absorption: correlation of transport in Caco-2 with drug pharmacokinetics in wild-type and mdr1a(-/-) mice in vivo.

Andrew Collett, Jolanta Tanianis-Hughes, David Hallifax, Geoff Warhurst

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Article in Pharmaceutical research, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
–field-weighted citation impact
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

17 citing papers in PubMed.

  1. Article
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  7. Renal Drug Transporters and Drug Interactions.Clinical pharmacokinetics · 2017
    Review
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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

4 authors.

Andrew CollettGut Barrier Group, School of Medicine, University of Manchester, Hope Hospital, Salford M6 8HD, UK.
Jolanta Tanianis-Hughes
David Hallifax
Geoff Warhurst

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeCell-based permeability screens are widely used to identify drug-P-glycoprotein (PGP) interaction in vitro. However, their reliability in predicting the impact of PGP on human drug pharmacokinetics is poorly defined. The aim was to determine whether a quantitative relationship exists between PGP-mediated alterations in Caco-2 permeability and oral pharmacokinetics in mice.

methodsTwo indicators of drug efflux were measured in Caco-2 for a group of 10 compounds, the ratio of A-B and B-A transport (R9B-A/A-B)) and the ratio of A-B transport in the presence and absence of a PGP inhibitor, GF120918 (R(GF)). These data were correlated with ratios of oral plasma levels in either mdr1a(-/-) or mdr1a/1b(-/-) and wild-type mice (R(KO/WT in vivo)) calculated from literature data on these compounds.

resultsA significant, positive correlation (r2 = 0.8, p < 0.01) was observed between RGF and R(KO/WT in vivo). In contrast, R(B-A/A-B), a more commonly used in vitro measure, showed a much weaker correlation with in vivo data (r2 = 0.33, p = 0.11). A strong correlation with R(GF) was also observed after correction of in vivo data for PGP effects on IV clearance.

conclusionThe increase in A-B drug permeability following inhibition of PGP in Caco-2 allows a reasonable prediction of the likely in vivo impact that PGP will have on plasma drug levels after oral administration.

Indexed as

Administration, OralAnimalsATP-Binding Cassette TransportersATP Binding Cassette Transporter, Subfamily BATP Binding Cassette Transporter, Subfamily B, Member 1Biological Transport, ActiveCaco-2 CellsCell Membrane PermeabilityHumansIntestinal AbsorptionMiceMice, KnockoutPharmacokineticsSpectrometry, Mass, Electrospray IonizationATP-Binding Cassette TransportersATP Binding Cassette Transporter, Subfamily BATP Binding Cassette Transporter, Subfamily B, Member 1multidrug resistance protein 3

Identifiers

What OpenQuestion holds

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Registered trials

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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.