Identification and targeting of cancer stem cells.
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.
Schatton
Tobias
T
Transplantation Research Center, Children's Hospital Boston & Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
Frank
Natasha Y
NY
Frank
Markus H
MH
D000818:Animals; D014408:Biomarkers, Tumor / Q000378:metabolism; D002454:Cell Differentiation; D019070:Cell Lineage; D006801:Humans; D009369:Neoplasms / Q000235:genetics / Q000473:pathology / Q000628:therapy; D014411:Neoplastic Stem Cells / Q000166:cytology / Q000378:metabolism; D010641:Phenotype
D014408:Biomarkers, Tumor
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