Evidence map›Paper›PMID 23738951›Full record

ArticleBritish journal of clinical pharmacology2014

Population pharmacokinetic and pharmacogenetic analysis of tacrolimus in paediatric liver transplant patients.

Mariam H Abdel Jalil, Ahmed F Hawwa, Patrick J McKiernan, Michael D Shields, James C McElnay

Abstract read
In one paragraph

Article in British journal of clinical pharmacology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
–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

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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

16 citing papers in PubMed, 1 synthesis or guideline pooled it.

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4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

5 authors.

Mariam H Abdel JalilClinical and Practice Research Group, School of Pharmacy, Medical Biology Centre, Queen's University Belfast, Belfast, UK.
Ahmed F Hawwa
Patrick J McKiernan
Michael D Shields
James C McElnay

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsTo build a population pharmacokinetic model that describes the apparent clearance of tacrolimus and the potential demographic, clinical and genetically controlled factors that could lead to inter-patient pharmacokinetic variability within children following liver transplantation.

methodsThe present study retrospectively examined tacrolimus whole blood pre-dose concentrations (n = 628) of 43 children during their first year post-liver transplantation. Population pharmacokinetic analysis was performed using the non-linear mixed effects modelling program (nonmem) to determine the population mean parameter estimate of clearance and influential covariates.

resultsThe final model identified time post-transplantation and CYP3A5*1 allele as influential covariates on tacrolimus apparent clearance according to the following equation: TVCL = 12.9 x (Weight/13.2)(0.75) x EXP(-0.00158 x TPT) x EXP(0.428 x CYP3A5) where TVCL is the typical value for apparent clearance, TPT is time post-transplantation in days and the CYP3A5 is 1 where *1 allele is present and 0 otherwise. The population estimate and inter-individual variability (%CV) of tacrolimus apparent clearance were found to be 0.977 l  h(-1)  kg(-1) (95% CI 0.958, 0.996) and 40.0%, respectively, while the residual variability between the observed and predicted concentrations was 35.4%.

conclusionTacrolimus apparent clearance was influenced by time post-transplantation and CYP3A5 genotypes. The results of this study, once confirmed by a large scale prospective study, can be used in conjunction with therapeutic drug monitoring to recommend tacrolimus dose adjustments that take into account not only body weight but also genetic and time-related changes in tacrolimus clearance.

Indexed as

Liver TransplantationTransplant RecipientsAdolescentATP Binding Cassette Transporter, Subfamily BChildChild, PreschoolCytochrome P-450 CYP3AFemaleGenotypeGraft RejectionHumansImmunosuppressive AgentsInfantKidney DiseasesMaleModels, BiologicalABCB1 protein, humanATP Binding Cassette Transporter, Subfamily BCYP3A5 protein, humanCytochrome P-450 CYP3AImmunosuppressive AgentsTacrolimusgene polymorphismsliver transplantnonmempaediatricspopulation pharmacokineticstacrolimus

Identifiers

PMID23738951
PMCPMC3895354

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.