Journal
CELL REPORTS
Volume 6, Issue 3, Pages 514-527Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2013.12.041
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Funding
- National Cancer Institute Physical Sciences Oncology Center [U54CA143874, U54CA143798]
- Susan G. Komen Foundation
- Cellex Foundation
- Redes Tematicas de Investigacion en Cancer [RD12/0036/0055]
- Breast Cancer Research Foundation
- U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- National Institute for Health Research [NF-SI-0512-10122] Funding Source: researchfish
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Cancer therapy exerts a strong selection pressure that shapes tumor evolution, yet our knowledge of how tumors change during treatment is limited. Here, we report the analysis of cellular heterogeneity for genetic and phenotypic features and their spatial distribution in breast tumors pre- and post-neoadjuvant chemotherapy. We found that intratumor genetic diversity was tumor-subtype specific, and it did not change during treatment in tumors with partial or no response. However, lower pretreatment genetic diversity was significantly associated with pathologic complete response. In contrast, phenotypic diversity was different between pre- and post-treatment samples. We also observed significant changes in the spatial distribution of cells with distinct genetic and phenotypic features. We used these experimental data to develop a stochastic computational model to infer tumor growth patterns and evolutionary dynamics. Our results highlight the importance of integrated analysis of genotypes and phenotypes of single cells in intact tissues to predict tumor evolution.
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