Evidence map›Paper›PMID 30610275›Full record

ArticleEuropean journal of clinical pharmacology2019

Comparison of plasma and oral fluid concentrations of mycophenolic acid and its glucuronide metabolite by LC-MS in kidney transplant patients.

Pâmela C Lukasewicz Ferreira, Flavia Valladao Thiesen, Thaina Tavares de Araujo, Domingos Otávio D'Ávila, Giovani Gadonski, Carmem Silvana A de Oliveira, Aline Rigon Zimmer, Pedro Eduardo Fröehlich

Open access · greenAbstract readComparative Study
PubMed Publisher
In one paragraph

Article in European journal of clinical pharmacology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 29% 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

9 citing papers in PubMed, 1 synthesis or guideline pooled it, 12 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 3 institutions in 1 country.

Pâmela C Lukasewicz FerreiraPrograma de Pós Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Av. Ipiranga 2752, Porto Alegre, RS, 90610-000, Brazil. pamlukasewicz@gmail.com.ORCID http://orcid.org/0000-0003-2134-9829
Flavia Valladao ThiesenPontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga 6682, Porto Alegre, RS, 90619-900, Brazil.
Thaina Tavares de AraujoPontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga 6682, Porto Alegre, RS, 90619-900, Brazil.
Domingos Otávio D'ÁvilaCentro de Pesquisa Clínica, Hospital São Lucas da PUC, Av. Ipiranga 6690, Porto Alegre, RS, 90619-900, Brazil.
Giovani GadonskiClínica Medica, Hospital São Lucas da PUC, Av. Ipiranga 6690, Porto Alegre, RS, 90619-900, Brazil.
Carmem Silvana A de OliveiraCentro de Pesquisa Clínica, Hospital São Lucas da PUC, Av. Ipiranga 6690, Porto Alegre, RS, 90619-900, Brazil.
Aline Rigon ZimmerPrograma de Pós Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Av. Ipiranga 2752, Porto Alegre, RS, 90610-000, Brazil.
Pedro Eduardo FröehlichPrograma de Pós Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Av. Ipiranga 2752, Porto Alegre, RS, 90610-000, Brazil.
Hospital São Lucas da PUCRS · BRUniversidade Federal do Rio Grande do Sul · BRPontifícia Universidade Católica do Rio Grande do Sul · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeMycophenolic acid is one of the most used immunosuppressive drugs in solid organ transplant treatments in the world. Developing a highly sensitive analytical method to analyse the drug and its metabolites in oral fluid and plasma is important to evaluate the possibility of using oral fluid as a biological matrix in therapeutic drug monitoring, instead of plasma.

methodThe liquid chromatography coupled to mass spectrometry (LC-MS) method was developed and validated for determining mycophenolic acid (MPA) and its glucuronide metabolite (MPAG) in oral fluid and plasma, with both matrices presenting a detection limit of 1 ng/mL for MPA and 5 ng/mL for MPAG. Both analytes were analysed after a simple protein precipitation procedure. Transplanted-kidney samples of oral fluid and blood were collected from 13 patients that were hospitalised and kept at - 80 °C until analyses.

resultsThe proposed method was linear in the concentration range of 5-500 ng/mL for MPA and 10-500 ng/mL for MPAG, with correlation coefficients (r) between 0.9925 and 0.9973. It was then applied to samples collected from kidney-transplanted patients and used for calculation of pharmacokinetics parameters.

conclusionAfter comparing plasma and oral fluid concentrations as well as performing a non-compartmental pharmacokinetic analysis of the average curves, it is possible to suggest that oral fluid concentration may be used as an alternative for MPA and MPAG monitoring in kidney transplant patients.

Indexed as

Kidney TransplantationChromatography, LiquidGlucuronidesHumansMycophenolic AcidSalivaTandem Mass SpectrometryGlucuronidesMycophenolic Acidmycophenolic acid glucuronideLC-MSMycophenolic acidMycophenolic acid glucuronideOral fluidPharmacokineticPlasma

Identifiers

PMID30610275
OpenAlexW2907362683

What OpenQuestion holds

Textmetadata
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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.