Evidence map›Paper›PMID 10675353›Full record

ArticleThe Journal of clinical investigation2000

Multidrug resistance protein 1 protects the choroid plexus epithelium and contributes to the blood-cerebrospinal fluid barrier.

J Wijnholds, E C deLange, G L Scheffer, D J van den Berg, C A Mol, M van der Valk, A H Schinkel, R J Scheper, D D Breimer, P Borst

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of clinical investigation, 2000. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 85 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
85citing papers in PubMed, 1 pooled it
15.1field-weighted citation impact, top 1% 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

85 citing papers in PubMed, 1 synthesis or guideline pooled it, 358 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Review
  4. Progress in characterizing ABC multidrug transporters in zebrafish.Drug resistance updates : reviews and commentaries in antimicrobial and anticancer chemotherapy · 2024
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  7. Differential Expression ofPharmaceutics · 2023
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25 more citing papers are in PubMed but not listed here.

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

10 authors at 4 institutions in 1 country.

J WijnholdsDivision of Molecular Biology and Center for Biomedical Genetics, The Netherlands Cancer Institute, 1066 CX Amsterdam, The Netherlands.
E C deLange
G L Scheffer
D J van den Berg
C A Mol
M van der Valk
A H Schinkel
R J Scheper
D D Breimer
P Borst
Centre for Human Drug Research · NLThe Netherlands Cancer Institute · NLUniversity of Amsterdam · NLCancer Genomics Centre · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Multidrug resistance protein 1 (MRP1) is a transporter protein that helps to protect normal cells and tumor cells against the influx of certain xenobiotics. We previously showed that Mrp1 protects against cytotoxic drugs at the testis-blood barrier, the oral epithelium, and the kidney urinary collecting duct tubules. Here, we generated Mrp1/Mdr1a/Mdr1b triple-knockout (TKO) mice, and used them together with Mdr1a/Mdr1b double-knockout (DKO) mice to study the contribution of Mrp1 to the tissue distribution and pharmacokinetics of etoposide. We observed increased toxicity in the TKO mice, which accumulated etoposide in brown adipose tissue, colon, salivary gland, heart, and the female urogenital system. Immunohistochemical staining revealed the presence of Mrp1 in the oviduct, uterus, salivary gland, and choroid plexus (CP) epithelium. To explore the transport function of Mrp1 in the CP epithelium, we used TKO and DKO mice cannulated for cerebrospinal fluid (CSF). We show here that the lack of Mrp1 protein causes etoposide levels to increase about 10-fold in the CSF after intravenous administration of the drug. Our results indicate that Mrp1 helps to limit tissue distribution of certain drugs and contributes to the blood-CSF drug-permeability barrier.

Indexed as

Genes, MDRAnimalsATP Binding Cassette Transporter, Subfamily B, Member 1Blood-Brain BarrierCerebrospinal FluidChoroid PlexusEpithelial CellsEtoposideFemaleMiceMice, KnockoutATP Binding Cassette Transporter, Subfamily B, Member 1Etoposide

Identifiers

PMID10675353
PMCPMC377447
OpenAlexW2153338237

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.