Journal
CELL REPORTS
Volume 24, Issue 12, Pages 3237-3250Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2018.08.053
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Funding
- Israel Cancer Research Fund
- Israel Science Foundation [2309/15, 2511/17]
- United States-Israel Binational Science Foundation [2015205]
- Israel Cancer Association
- Jacob and Lena Joels Memorial Foundation
- Lower Saxony-Israel Research Cooperation Program
- Janey Scholarship
- Leonard and Faigel Shapiro Fellowship
- Bester Scholarship Fund
- Brody Foundation Fellowship
- Albert Sweet Scholarship
- Division Of Research On Learning
- Directorate for STEM Education [2015205] Funding Source: National Science Foundation
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Differentiation events contribute to phenotypic cellular heterogeneity within tumors and influence disease progression and response to therapy. Here, we dissect mechanisms controlling intratumoral heterogeneity within triple-negative basal-like breast cancers. Tumor cells expressing the cytokeratin K14 possess a differentiation state that is associated with that of normal luminal progenitors, and K14-negative cells are in a state closer to that of mature luminal cells. We show that cells can transition between these states through asymmetric divisions, which produce one K14(+) and one K14(-) daughter cell, and that these asymmetric divisions contribute to the generation of cellular heterogeneity. We identified several regulators that control the proportion of K14(+) cells in the population. EZH2 and Notch increase the numbers of K14(+) cells and their rates of symmetric divisions, and FOXA1 has an opposing effect. Our findings demonstrate that asymmetric divisions generate differentiation transitions and heterogeneity, and identify pathways that control breast cancer cellular composition.
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