Glioblastoma heterogeneity and cancer cell plasticity

Dinorah Friedmann-Morvinski*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

161 Scopus citations

Abstract

Glioblastoma (GBM) is the most common and malignant type of primary brain tumor. It represents one of the deadliest human cancers, with an average survival at diagnosis of about 1 year. This poor prognosis is due to therapeutic resistance and tumor recurrence after surgical removal. One of the most important hallmarks of GBM is tumor heterogeneity. Intertumor heterogeneity is mostly characterized by distinct genetic alterations that occur in individual tumors originating in the same organ and allows the classification of these tumors into different molecular subtypes. Intratumor heterogeneity—the diversity within individual tumors—has become the focus of research interest in the past few years, and tumor cell plasticity as a new source of cancer stem cells has added another level of complexity to this phenomenon. This review describes the molecular heterogeneity of GBMs at the transcriptome level and the expression profile–based classification of histopathologically indistinguishable tumors into different subtypes. In addition, the role of dedifferentiation of tumor cells into a stem cell–like state is discussed as a source of cellular heterogeneity within tumors, highlighting tumor cell plasticity as an important driver of GBM heterogeneity. Understanding tumor heterogeneity will help design better therapies against GBM and avoid tumor recurrence.

Original languageEnglish
Pages (from-to)327-336
Number of pages10
JournalCritical Reviews in Oncogenesis
Volume19
Issue number5
DOIs
StatePublished - 2014

Keywords

  • Cancer stem cells
  • Cell of origin
  • Dedifferentiation
  • Glioblastoma
  • Heterogeneity
  • Reprogramming

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