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Updated: Jun 23, 2025

Genome-wide RNAi Screening to Identify Host Factors That Modulate Oncolytic Virus Therapy
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Oscillations in a Spatial Oncolytic Virus Model.

Arwa Abdulla Baabdulla1, Thomas Hillen2

  • 1Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, Canada. baabdull@ualberta.ca.

Bulletin of Mathematical Biology
|June 19, 2024
PubMed
Summary

Virotherapy, a promising cancer treatment, uses oncolytic viruses that create spatial patterns. This study identifies conditions for the hollow ring pattern, crucial for tumor eradication, and analyzes virus invasion dynamics.

Keywords:
Hopf bifurcationOncolytic virusReaction diffusion systemSpatial viral distributionTravelling waveTumor control probability

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Area of Science:

  • Mathematical Oncology
  • Virology
  • Biophysics

Background:

  • Virotherapy utilizes oncolytic viruses for targeted cancer treatment.
  • Mathematical models reveal predator-prey dynamics and spatio-temporal patterns in virus-cancer interactions.
  • Hopf bifurcations underlie oscillatory patterns in these models.

Purpose of the Study:

  • To systematically analyze spatial oscillations in virotherapy models.
  • To identify conditions for specific spatio-temporal patterns, particularly the hollow ring pattern for tumor eradication.
  • To determine the minimal speeds of cancer and virus invasion waves.

Main Methods:

  • Bifurcation analysis of a spatially explicit reaction-diffusion model.
  • Numerical simulations in 2-D to observe virus-cancer spatial dynamics.
  • Derivation of traveling wave speeds.

Main Results:

  • Exact conditions for the occurrence of the hollow ring pattern were determined.
  • Minimal invasion speeds for cancer cells and oncolytic viruses were derived.
  • Complex spatial interactions and a novel 'periodic peak splitting' phenomenon were observed in simulations.

Conclusions:

  • The hollow ring pattern is achievable and clinically relevant for tumor eradication via virotherapy.
  • The study provides insights into the dynamics of oncolytic virus spread and interaction with tumors.
  • Further research is needed to explain the observed 'periodic peak splitting' phenomenon.