Temozolomide treatment increases fatty acid uptake in glioblastoma stem cells

Seamus Caragher, Jason Miska, Jack Shireman, Cheol H. Park, Megan Muroski, Maciej S. Lesniak, Atique U. Ahmed*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Among all cancers, glioblastoma (GBM) remains one of the least treatable. One key factor in this resistance is a subpopulation of tumor cells termed glioma stem cells (GSCs). These cells are highly resistant to current treatment modalities, possess marked self-renewal capacity, and are considered key drivers of tumor recurrence. Further complicating an understanding of GBM, evidence shows that the GSC population is not a pre-ordained and static group of cells but also includes previously differentiated GBM cells that have attained a GSC state secondary to environmental cues. The metabolic behavior of GBM cells undergoing plasticity remains incompletely understood. To that end, we probed the connection between GSCs, environmental cues, and metabolism. Using patient-derived xenograft cells, mouse models, transcriptomics, and metabolic analyses, we found that cell state changes are accompanied by sharp changes in metabolic phenotype. Further, treatment with temozolomide, the current standard of care drug for GBM, altered the metabolism of GBM cells and increased fatty acid uptake both in vitro and in vivo in the plasticity driven GSC population. These results indicate that temozolomide-induced changes in cell state are accompanied by metabolic shifts—a potentially novel target for enhancing the effectiveness of current treatment modalities.

Original languageEnglish (US)
Article number3126
Pages (from-to)1-16
Number of pages16
JournalCancers
Volume12
Issue number11
DOIs
StatePublished - Nov 2020

Keywords

  • Chemoresistance
  • Glioblastoma
  • Glioma stem cell
  • Metabolism
  • Therapeutic stress

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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