Evidence map›Paper›PMID 12182760›Full record

ArticleBMC clinical pharmacology2002

PKQuest: a general physiologically based pharmacokinetic model. Introduction and application to propranolol.

David G Levitt

Abstract read
In one paragraph

Article in BMC clinical pharmacology, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
–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

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.

  1. Heterogeneity of human adipose blood flow.BMC clinical pharmacology · 2007
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  3. Effect of Propranolol on Motor Cortex Excitability in Essential Tremor: An Exploratory Study.Tremor and other hyperkinetic movements (New York, N.Y.) · 2024
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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

1 author.

David G LevittDepartment of Physiology, Minneapolis, MN 55455, USA. levitt@dcmir.med.umn.edu

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundA "physiologically based pharmacokinetic" (PBPK) approach uses a realistic model of the animal to describe the pharmacokinetics. Previous PBPKs have been designed for specific solutes, required specification of a large number of parameters and have not been designed for general use.

methodsThis new PBPK program (PKQuest) includes a "Standardhuman" and "Standardrat" data set so that the user input is minimized. It has a simple user interface, graphical output and many new features: 1) An option that uses the measured plasma concentrations to solve for the time course of the gastrointestinal, intramuscular, intraperotineal or skin absorption and systemic availability of a drug - for a general non-linear system. 2) Capillary permeability limitation defined in terms of the permeability-surface area products. 4) Saturable plasma and tissue protein binding. 5) A lung model that includes perfusion-ventilation mismatch. 6) A general optimization routine using either a global (simulated annealing) or local (Powell) minimization applicable to all model parameters.

resultsPKQuest was applied to measurements of human propranolol pharmacokinetics and intestinal absorption. A meal has two effects: 1) increases portal blood flow by 50%; and 2) decreases liver metabolism by 20%. There is a significant delay in the oval propranolol absorption in fasting subjects that is absent in fed subjects. The oral absorption of the long acting form of propranolol continues for a period of more than 24 hours.

conclusionsPKQuest provides a new general purpose, easy to use, freely distributed www.pkquest.com and physiologically rigorous PBPK software routine.

Indexed as

Models, BiologicalAbsorptionAntihypertensive AgentsDelayed-Action PreparationsDrug Administration RoutesHumansMetabolic Clearance RatePropranololTissue DistributionAntihypertensive AgentsDelayed-Action PreparationsPropranolol

Identifiers

PMID12182760
PMCPMC126244

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.