Evidence map›Paper›PMID 21153753›Full record

ArticleInvestigational new drugs2012

A simultaneous analysis of the time-course of leukocytes and neutrophils following docetaxel administration using a semi-mechanistic myelosuppression model.

Angelica Linnea Quartino, Lena E Friberg, Mats O Karlsson

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Article in Investigational new drugs, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing 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

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

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

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  17. Transit and lifespan in neutrophil production: implications for drug intervention.Journal of pharmacokinetics and pharmacodynamics · 2018
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  18. Population Pharmacokinetic-Pharmacodynamic Modeling of 5-Fluorouracil for Toxicities in Rats.European journal of drug metabolism and pharmacokinetics · 2017
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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

3 authors.

Angelica Linnea QuartinoThe Pharmacometrics Research Group, Department of Pharmaceutical Biosciences, Uppsala University, Box 591, SE-751 24 Uppsala, Sweden. angelica.quartino@farmbio.uu.se
Lena E Friberg
Mats O Karlsson

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo improve the predictive capacity of a semi-mechanistic myelosuppression model for neutrophils as the model have shown to over-predict the nadir of neutrophils and, secondly, to develop a model describing the time-course of leukocytes and neutrophils simultaneously. EXPERIMENTAL

designThe study included 601 cancer patients treated with a 1 h infusion of docetaxel in monotherapy. A total of 3,549 pairwise observations of leukocytes and neutrophils from one treatment cycle were analyzed simultaneously in NONMEM.

resultsA basic model was developed consisting of a neutrophil and a non-neutrophil model, each with the same structure as the semi-mechanistic myelosuppression model. The leukocytes were modeled as the sum of the predicted neutrophils and non-neutrophils. The model described the time-course of the leukocytes well, but was not able to capture the nadir of the neutrophils. Hence the model was further refined and the included modifications (p < 0.001) in the final model are a sigmoid Emax functions for the drug effect, feedback functions on the cell maturation time in bone-marrow and an optimized number of transit compartments for each of the two cell types.

conclusionsA joint semi-mechanistic myelosuppression model describing the time-course of leukocytes and neutrophils following docetaxel administration was developed. The data supported a more complex model compared to the previous model developed by Friberg et al. (2002), and increased the model's capacity to accurately describe the time-course of neutrophils following docetaxel therapy. The combined model also illustrates the differences between the cell types and allows prediction of neutrophil counts from leukocyte measurements.

Indexed as

Models, ImmunologicalModels, StatisticalAntineoplastic AgentsBone MarrowDocetaxelDrug Administration ScheduleHumansInfusions, IntravenousLeukocyte CountLeukocytesNeoplasmsNeutrophilsNonlinear DynamicsTaxoidsTime FactorsTreatment OutcomeAntineoplastic AgentsDocetaxelTaxoids

Identifiers

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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.