Constraint based modeling of drug induced metabolic changes in a cancer cell line

Xavier Benedicto1, Åsmund Flobak2,3,4, Miguel Ponce-de-Leon5

  • 1Barcelona Supercomputing Center (BSC), Barcelona, Spain.

Insights

This study reveals how cancer cells alter metabolism to survive. Combining kinase inhibitors affects specific metabolic pathways, offering new therapeutic strategies for gastric cancer and highlighting drug synergy mechanisms.

Area of Science:

  • Metabolic reprogramming in cancer
  • Cancer cell metabolism and therapy

Background:

  • Cancer cells exhibit altered metabolism to fuel growth and survival.
  • Metabolic pathways are promising therapeutic targets in oncology.
  • Gastric cancer presents a significant clinical challenge.

Purpose of the Study:

  • To investigate the metabolic effects of kinase inhibitors and their combinations in gastric cancer cells.
  • To identify synergistic drug combinations targeting cancer metabolism.
  • To explore metabolic pathway activity using computational methods.

Main Methods:

  • Utilized genome-scale metabolic models and transcriptomic profiling of the AGS gastric cancer cell line.
  • Applied the Tasks Inferrred from Differential Expression (TIDE) algorithm and a variant using task-essential genes.
  • Analyzed metabolic pathway activity changes under various drug treatment conditions.

Main Results:

  • Observed widespread down-regulation of biosynthetic pathways, especially in amino acid and nucleotide metabolism.
  • Identified condition-specific metabolic alterations induced by combinatorial treatments.
  • Found synergistic effects in the PI3K inhibitor-MEK inhibitor (PI3Ki-MEKi) condition impacting ornithine and polyamine biosynthesis.

Conclusions:

  • Metabolic shifts provide insights into mechanisms of drug synergy in gastric cancer.
  • Identified potential therapeutic vulnerabilities related to metabolic pathways.
  • Developed MTEApy, an open-source Python package for TIDE analysis, to enhance reproducibility.

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