Identification and targeting of cancer stem cells

Bioessays. 2009 Oct;31(10):1038-49. doi: 10.1002/bies.200900058.


Cancer stem cells (CSC) represent malignant cell subsets in hierarchically organized tumors, which are selectively capable of tumor initiation and self-renewal and give rise to bulk populations of non-tumorigenic cancer cell progeny through differentiation. Robust evidence for the existence of prospectively identifiable CSC among cancer bulk populations has been generated using marker-specific genetic lineage tracking of molecularly defined cancer subpopulations in competitive tumor development models. Moreover, novel mechanisms and relationships have been discovered that link CSC to cancer therapeutic resistance and clinical tumor progression. Importantly, proof-of-principle for the potential therapeutic utility of the CSC concept has recently been provided by demonstrating that selective killing of CSC through a prospective molecular marker can inhibit tumor growth. Herein, we review these novel and translationally relevant research developments and discuss potential strategies for CSC-targeted therapy in the context of resistance mechanisms and molecular pathways preferentially operative in CSC.

Publication types

  • Research Support, N.I.H., Extramural
  • Review

MeSH terms

  • Animals
  • Biomarkers, Tumor / metabolism
  • Cell Differentiation
  • Cell Lineage
  • Humans
  • Neoplasms* / genetics
  • Neoplasms* / pathology
  • Neoplasms* / therapy
  • Neoplastic Stem Cells* / cytology
  • Neoplastic Stem Cells* / metabolism
  • Phenotype


  • Biomarkers, Tumor