Evidence map›Paper›PMID 20680253›Full record

ArticleEuropean journal of clinical pharmacology2010

Proposal of a new limited sampling strategy to predict CYP3A activity using a partial AUC of midazolam.

Stephanie Katzenmaier, Christoph Markert, Gerd Mikus

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Article in European journal of clinical pharmacology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

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0cells of the map it votes in
20citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

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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.

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3 · Its place in the literature

Who cites it

20 citing papers in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

3 authors.

Stephanie KatzenmaierDepartment of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.
Christoph Markert
Gerd Mikus

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeMidazolam metabolic clearance to 1'-hydroxymidazolam is an accurate measure of CYP3A activity which requires extensive plasma and urine sampling. The objective of this study was to find a new limited sampling strategy (LSS) to predict midazolam metabolic clearance to 1'-hydroxymidazolam and subsequently CYP3A activity in an easy and reliable way, reducing costs and labour.

methodsThe development of this LSS is based on data from an in vivo drug-drug interaction study carried out in our clinical research unit. Various partial AUCs of midazolam were calculated and correlated with metabolic clearance of midazolam to 1'-hydroxymidazolam by non-linear regression. The correlation with highest r (2) values was chosen to predict the midazolam metabolic clearance. Statistical significance of this method was verified by calculating the 95% confidence interval of the differences (%) between predicted and measured metabolic clearance of midazolam to 1'-hydroxymidazolam.

resultsThe midazolam partial AUC from 2 to 4 h after oral administration correlated best with metabolic clearance of midazolam to 1'-hydroxymidazolam with r (2) = 0.9816. This partial AUC comprised four midazolam concentrations at 2, 2.5, 3 and 4 h after oral administration of a midazolam solution. The 95% confidence interval of the differences between predicted metabolic clearance and measured metabolic clearance of midazolam to 1'-hydroxymidazolam was -0.97 to +13.2.

conclusionThe determination of the partial AUC using four plasma samples from 2 to 4 h after oral administration of a midazolam solution is proposed to be an easy and reliable CYP3A phenotyping measure which of course needs to be validated in prospective clinical trials.

Indexed as

Area Under CurveAdjuvants, AnesthesiaAdministration, OralCytochrome P-450 CYP3ADrug InteractionsHumansMathematical ComputingMetabolic Clearance RateMidazolamPredictive Value of TestsSpecimen HandlingTime Factors1-hydroxymethylmidazolamAdjuvants, AnesthesiaCYP3A protein, humanCytochrome P-450 CYP3AMidazolam

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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.