Evidence map›Paper›PMID 9619778›Full record

ArticlePharmaceutical research1998

Decreased expression and activity of P-glycoprotein in rat liver during acute inflammation.

M Piquette-Miller, A Pak, H Kim, R Anari, A Shahzamani

Abstract read
PubMed Publisher
In one paragraph

Article in Pharmaceutical research, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
1.3field-weighted citation impact, top 20% 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

24 citing papers in PubMed, 138 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Review
  5. Review
  6. Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. MDR-1 gene C/T polymorphism in COPD: data from Aegean part of Turkey.International journal of clinical and experimental medicine · 2014
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Review
  20. 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 1 institution in 1 country.

M Piquette-MillerFaculty of Pharmacy, University of Toronto, Ontario, Canada. m.piquette.miller@utoronto.ca
A Pak
H Kim
R Anari
A Shahzamani
University of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeDrug disposition is often altered in inflammatory disease. Although the influence of inflammation on hepatic drug metabolism and protein binding has been well studied, its impact on drug transport has largely been overlooked. The multidrug resistance (MDR) gene product, P-glycoprotein (P-gp) is involved in the active secretion of a large variety of drugs. Our goal was to ascertain the influence of acute inflammation (AI) on the expression and functional activity of P-gp.

methodsAI was induced in rats through turpentine or lipopolysaccharide (LPS) administration. Expression of P-gp in liver was detected at the level of protein on Western blots using the monoclonal antibody C-219 and at the level of mRNA using an RNase protection assay. P-gp mediated transport activity was assessed by measuring the verapamil-inhibitable efflux of rhodamine 123 (R123) in freshly isolated hepatocytes.

resultsTurpentine-induced AI significantly decreased the hepatic protein expression of P-gp isoforms by 50-70% and caused a significant 45-65% reduction in the P-gp mediated efflux of R123. Diminished mRNA levels of all three MDR isoforms were seen. LPS-induced AI similarly resulted in significantly reduced levels and activity of P-gp in liver. Although differences in the constitutive levels of P-gp were seen between male and female rats, the influence of AI on P-gp expression and activity was not gender specific.

conclusionsExperimentally-induced inflammation decreases the in vivo expression and activity of P-gp in liver. This is the first evidence that expression of P-gp is modulated in response to experimentally-induced inflammation.

Indexed as

Acute DiseaseAcute-Phase ReactionAnimalsAntimetabolites, AntineoplasticATP Binding Cassette Transporter, Subfamily B, Member 1Drug Resistance, MultipleFemaleInflammationLipopolysaccharidesLiverMaleRatsRats, Sprague-DawleyRhodamine 123RhodaminesRNA, MessengerAntimetabolites, AntineoplasticATP Binding Cassette Transporter, Subfamily B, Member 1LipopolysaccharidesRhodamine 123RhodaminesRNA, Messenger

Identifiers

PMID9619778
OpenAlexW97686115

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.