Evidence map›Paper›PMID 29616423›Full record

ArticleEuropean journal of drug metabolism and pharmacokinetics2018

Pharmacokinetics of the P-gp Inhibitor Tariquidar in Rats After Intravenous, Oral, and Intraperitoneal Administration.

Peter Matzneller, Manuel Kussmann, Sabine Eberl, Alexandra Maier-Salamon, Walter Jäger, Martin Bauer, Oliver Langer, Markus Zeitlinger, Wolfgang Poeppl

Open access · hybridAbstract readComparative Study
In one paragraph

Article in European journal of drug metabolism and pharmacokinetics, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
1.2field-weighted citation impact, top 17% 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

18 citing papers in PubMed, 29 citations in OpenAlex.

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  3. Oral Administration of [Molecular imaging and biology · 2025
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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

9 authors at 2 institutions in 1 country.

Peter MatznellerDepartment of Clinical Pharmacology, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria.
Manuel KussmannDepartment of Internal Medicine I, Clinical Division of Infectious Diseases and Tropical Medicine, Medical University Vienna, Vienna, Austria.
Sabine EberlDepartment of Clinical Pharmacology, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria.
Alexandra Maier-SalamonDepartment of Clinical Pharmacy and Diagnostics, University of Vienna, Vienna, Austria.
Walter JägerDepartment of Clinical Pharmacy and Diagnostics, University of Vienna, Vienna, Austria.
Martin BauerDepartment of Clinical Pharmacology, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria.
Oliver LangerDepartment of Clinical Pharmacology, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria. oliver.langer@meduniwien.ac.at.
Markus ZeitlingerDepartment of Clinical Pharmacology, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria.
Wolfgang PoepplDepartment of Internal Medicine I, Clinical Division of Infectious Diseases and Tropical Medicine, Medical University Vienna, Vienna, Austria.
Medical University of Vienna · ATUniversity of Vienna · AT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

objectiveP-glycoprotein (P-gp), a transmembrane transporter expressed at the blood-brain barrier, restricts the distribution of diverse central nervous system-targeted drugs from blood into brain, reducing their therapeutic efficacy. The third-generation P-gp inhibitor tariquidar (XR9576) was shown to enhance brain distribution of P-gp substrate drugs in humans. Oral bioavailability of tariquidar was found to be low in humans requiring the compound to be administered intravenously, which hinders a broader clinical use. The objective of the present study was to investigate the plasma pharmacokinetics of tariquidar in rats after single intravenous, oral, and intraperitoneal administration.

methodsTwo different tariquidar formulations (A and B) were used, both at a dosage of 15 mg/kg, respectively. Formulation A was a solution and formulation B was a microemulsion which was previously shown to improve the oral bioavailability of the structurally related P-gp inhibitor elacridar in mice.

resultsIn contrast to human data, the present study found a high bioavailability of tariquidar in rats after oral dosing. Oral bioavailability was significantly higher (p = 0.032) for formulation B (86.3%) than for formulation A (71.6%). After intraperitoneal dosing bioavailability was 91.4% for formulation A and 99.6% for formulation B.

conclusionThe present findings extend the available information on tariquidar and provide a basis for future studies involving oral administration of this compound.

Indexed as

Administration, OralAnimalsATP Binding Cassette Transporter, Subfamily B, Member 1Biological AvailabilityDrug CompoundingInjections, IntraperitonealInjections, IntravenousMaleModels, BiologicalQuinolinesRats, Sprague-DawleyATP Binding Cassette Transporter, Subfamily B, Member 1Quinolinestariquidar

Identifiers

PMID29616423
PMCPMC6133083
OpenAlexW2796073152

What OpenQuestion holds

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LicenceCC BY-NC
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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.