Identification of Selective Inhibitors of Cancer Stem Cells by High-Throughput Screening
Author(s)Onder, Tamer T.; Jiang, Guozhi; Tao, Kai; Kuperwasser, Charlotte; Weinberg, Robert A.; Lander, Eric S.; Gupta, Piyush; ... Show more Show less
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Screens for agents that specifically kill epithelial cancer stem cells (CSCs) have not been possible due to the rarity of these cells within tumor cell populations and their relative instability in culture. We describe here an approach to screening for agents with epithelial CSC-specific toxicity. We implemented this method in a chemical screen and discovered compounds showing selective toxicity for breast CSCs. One compound, salinomycin, reduces the proportion of CSCs by >100-fold relative to paclitaxel, a commonly used breast cancer chemotherapeutic drug. Treatment of mice with salinomycin inhibits mammary tumor growth in vivo and induces increased epithelial differentiation of tumor cells. In addition, global gene expression analyses show that salinomycin treatment results in the loss of expression of breast CSC genes previously identified by analyses of breast tissues isolated directly from patients. This study demonstrates the ability to identify agents with specific toxicity for epithelial CSCs.
DepartmentLudwig Center for Molecular Oncology; Massachusetts Institute of Technology. Department of Biology; Whitehead Institute for Biomedical Research
Gupta, Piyush B., Tamer T. Onder, Guozhi Jiang, Kai Tao, Charlotte Kuperwasser, Robert A. Weinberg, and Eric S. Lander. “Identification of Selective Inhibitors of Cancer Stem Cells by High-Throughput Screening.” Cell 138, no. 4 (August 2009): 645–659. © 2009 Elsevier Inc.
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