Evolution of cancer cell populations under cytotoxic therapy and treatment optimisation: insight from a phenotype-structured model

Luis Almeida, Patrizia Bagnerini, Giulia Fabrini, Barry D. Hughes, Tommaso Lorenzi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We consider a phenotype-structured model of evolutionary dynamics in a population of cancer cells exposed to the action of a cytotoxic drug. The model consists of a nonlocal parabolic equation governing the evolution of the cell population density function. We develop a novel method for constructing exact solutions to the model equation, which allows for a systematic investigation of the way in which the size and the phenotypic composition of the cell population change in response to variations of the drug dose and other evolutionary parameters. Moreover, we address numerical optimal control for a calibrated version of the model based on biological data from the existing literature, in order to identify the drug delivery schedule that makes it possible to minimise either the population size at the end of the treatment or the average population size during the course of treatment. The results obtained challenge the notion that traditional high-dose therapy represents a 'one-fits-all solution' in anticancer therapy by showing that the continuous administration of a relatively low dose of the cytotoxic drug performs more closely to the optimal dosing regimen to minimise the average size of the cancer cell population during the course of treatment.
Original languageEnglish
Pages (from-to)1157-1190
JournalESAIM: Mathematical Modelling and Numerical Analysis (ESAIM: M2AN)
Volume53
Issue number4
Early online date4 Jul 2019
DOIs
Publication statusPublished - Jul 2019

Keywords

  • Cancer modelling
  • Therapy optimisation
  • Nonlocal parabolic equations
  • Exact solutions
  • Numerical optimal control

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