Evidence map›Paper›PMID 30604456›Full record

ArticleNeuropsychopharmacology reports2019

Determination of lamotrigine in human plasma using liquid chromatography-tandem mass spectrometry.

Shogo Itabashi, Rina Bito, Maika Nishina, Maki Fukumoto, Midori Soda, Mitsunori Doi, Shigeyuki Usui, Kiyoyuki Kitaichi

Open access · goldAbstract read
In one paragraph

Article in Neuropsychopharmacology reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
1.2field-weighted citation impact, top 24% 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

4 citing papers in PubMed, 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 1 institution in 1 country.

Shogo ItabashiLaboratory of Pharmaceutics, Department of Biomedical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan.
Rina BitoLaboratory of Pharmaceutics, Department of Biomedical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan.
Maika NishinaLaboratory of Pharmaceutics, Department of Biomedical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan.
Maki FukumotoLaboratory of Pharmaceutics, Department of Biomedical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan.
Midori SodaLaboratory of Pharmaceutics, Department of Biomedical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan.ORCID 0000-0002-1205-3447
Mitsunori DoiLaboratory of Pharmaceutics, Department of Biomedical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan.
Shigeyuki UsuiLaboratory of Pharmaceutics, Department of Biomedical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan.
Kiyoyuki KitaichiLaboratory of Pharmaceutics, Department of Biomedical Pharmaceutics, Gifu Pharmaceutical University, Gifu, Japan.
Gifu Pharmaceutical University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimLamotrigine (LTG) is a widely used anti-epileptic drug that is administered to avoid seizures and to maintain seizure-free status. However, several factors reportedly cause individual differences of plasma LTG levels, and the therapeutic target range of LTG varies between individuals. Thus, to optimize effective doses of LTG, we developed a rapid and simple method for determining plasma LTG concentrations.

methodsLamotrigine and the internal standard papaverine were extracted from human plasma using solid-phase extraction. After filtration, 5-μL aliquots of final samples were injected into the liquid chromatography-tandem mass spectrometry instrument and LTG and internal standard were separated using a Cadenza CD-C18 column (100 × 2 mm, 3 μm) with 0.1% formic acid in water/acetonitrile (2/1, v/v).

resultsThe calibration curve was linear from 0.2 to 5.0 μg/mL, and assessments of recovery, intra- and inter-day precision and accuracy, matrix effects, freeze and thaw stability, and long-term stability demonstrated good reproducibility. Retention times of LTG and internal standard were 1.6 and 2.0 minutes, respectively, and the total run time was 3.5 minutes for each sample.

conclusionWe developed a rapid and simple method for determining plasma LTG concentrations. The present novel system could be used to inform LTG dose adjustments for individual patients.

Indexed as

AnticonvulsantsBlood Chemical AnalysisCalibrationChromatography, LiquidHumansLamotrigineSensitivity and SpecificityTandem Mass SpectrometryAnticonvulsantsLamotrigineepilepsylamotrigineliquid chromatography-tandem mass spectrometryplasma concentrationsolid-phase extraction

Identifiers

PMID30604456
PMCPMC7292279
OpenAlexW2908013122

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.