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Tumour stem cells and drug resistance

Tumour stem cells and drug resistance Stem-cell populations have been identified in a range of haematopoietic and solid tumours, and might represent the cell of origin of these tumours. Normal and cancer stem cells express high levels of ATP-binding cassette (ABC) transporters, such as ABCB1, which encodes P-glycoprotein, and the half-transporter ABCG2, which was originally identified in mitoxantrone-resistant cells. The drug-transporting property of stem cells conferred by ABC transporters is the basis for the 'side-population' phenotype that arises from the exclusion of the fluorescent dye Hoechst 33342. Cancer stem cells are likely to share many of the properties of normal stem cells that provide for a long lifespan, including relative quiescence, resistance to drugs and toxins through the expression of several ABC transporters, an active DNA-repair capacity and a resistance to apoptosis. Therefore, tumours might have a built-in population of drug-resistant pluripotent cells that can survive chemotherapy and repopulate the tumour. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nature Reviews Cancer Springer Journals

Tumour stem cells and drug resistance

Nature Reviews Cancer , Volume 5 (4) – Apr 1, 2005

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References (113)

Publisher
Springer Journals
Copyright
Copyright © 2005 by Nature Publishing Group
Subject
Biomedicine; Biomedicine, general; Cancer Research
ISSN
1474-175X
eISSN
1474-1768
DOI
10.1038/nrc1590
Publisher site
See Article on Publisher Site

Abstract

Stem-cell populations have been identified in a range of haematopoietic and solid tumours, and might represent the cell of origin of these tumours. Normal and cancer stem cells express high levels of ATP-binding cassette (ABC) transporters, such as ABCB1, which encodes P-glycoprotein, and the half-transporter ABCG2, which was originally identified in mitoxantrone-resistant cells. The drug-transporting property of stem cells conferred by ABC transporters is the basis for the 'side-population' phenotype that arises from the exclusion of the fluorescent dye Hoechst 33342. Cancer stem cells are likely to share many of the properties of normal stem cells that provide for a long lifespan, including relative quiescence, resistance to drugs and toxins through the expression of several ABC transporters, an active DNA-repair capacity and a resistance to apoptosis. Therefore, tumours might have a built-in population of drug-resistant pluripotent cells that can survive chemotherapy and repopulate the tumour.

Journal

Nature Reviews CancerSpringer Journals

Published: Apr 1, 2005

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