Evidence map›Paper›PMID 23733010›Full record

Trial reportEuropean journal of clinical pharmacology2013

Pharmaceutical and genetic determinants for interindividual differences of tacrolimus bioavailability in renal transplant recipients.

Takenori Niioka, Hideaki Kagaya, Masatomo Miura, Kazuyuki Numakura, Mitsuru Saito, Takamitsu Inoue, Tomonori Habuchi, Shigeru Satoh

Abstract readClinical Trial
PubMed Publisher
In one paragraph

Trial report in European journal of clinical pharmacology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 2 pooled it
3.1field-weighted citation impact, top 9% 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

19 citing papers in PubMed, 2 syntheses or guidelines pooled it, 31 citations in OpenAlex.

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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

8 authors at 2 institutions in 1 country.

Takenori NiiokaDepartment of Pharmacy, Akita University Hospital, 1-1-1 Hondo, Akita, 010-8543, Japan.
Hideaki Kagaya
Masatomo Miura
Kazuyuki Numakura
Mitsuru Saito
Takamitsu Inoue
Tomonori Habuchi
Shigeru Satoh
Akita University · JPAkita University Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe pharmacokinetics of orally administered immediate-release, twice-daily (BID) and modified-release, once-daily (QD) formulations of tacrolimus have high interindividual variability. We investigated factors affecting interindividual variability of tacrolimus bioavailability in renal transplant patients.

methodsNinety-seven Japanese renal transplant patients (47 patients on tacrolimus BID and 50 patients on tacrolimus QD) were enrolled in this study. The tacrolimus absolute bioavailability was calculated using the area under the concentration-time curve from 0 to 24 h (AUC0-24) after continuous intravenous infusion and oral formulations of tacrolimus in the same recipient.

resultsThe median (quartile 1-quartile 3) tacrolimus relative bioavailability for recipients with the CYP3A5*1 or CYP3A5*3/*3 alleles was significantly lower for the tacrolimus QD group [9.1 % (6.3-10.7 %) and 15.4 % (11.5-18.7 %), respectively] than for the tacrolimus BID group [12.6 % (9.9-14.2 %) and 19.3 % (16.5-24.8 %), respectively] (P = 0.004 and 0.028, respectively). Consequently, tacrolimus absolute bioavailability was lowest for recipients with the CYP3A5*1 allele taking tacrolimus QD. The CYP3A5 polymorphism had no impact on the dose-adjusted AUC0-24 of tacrolimus in patients on continuous intravenous infusion (P = 0.906).

conclusionThe larger interindividual variability of tacrolimus bioavailability for oral formulations appears to be due to the effects of the CYP3A5 polymorphism and the tacrolimus oral formulation. These factors should therefore be taken into account when determining individualized tacrolimus dosing.

Indexed as

Kidney TransplantationAdultATP Binding Cassette Transporter, Subfamily BATP Binding Cassette Transporter, Subfamily B, Member 1Biological AvailabilityCytochrome P-450 CYP3AFemaleHumansImmunosuppressive AgentsMaleMiddle AgedPolymorphism, Single NucleotideTacrolimusABCB1 protein, humanATP Binding Cassette Transporter, Subfamily BATP Binding Cassette Transporter, Subfamily B, Member 1CYP3A5 protein, humanCytochrome P-450 CYP3AImmunosuppressive AgentsTacrolimus

Identifiers

PMID23733010
OpenAlexW1983289620

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.