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- W2401588986 abstract "Abstract What happens in the early and still undetectable human malignancy is unknown because direct observations are impractical. Here we present a “Big Bang” model, whereby a tumor grows predominantly as a single expansion producing numerous intermixed sub-clones, which are not subject to stringent clonal selection. In this model, both public and most detectable private mutations arise during the earliest phase of tumor growth. Multi-scale genomic profiling of 349 individual glands sampled from 15 colorectal tumors revealed the absence of selective sweeps, uniformly high intra-tumor heterogeneity, and sub-clone mixing in distant tumor regions, as postulated by the Big Bang. By integrating the data in a spatial model of tumor growth and statistical inference framework we also verified the most striking prediction of our model, namely that most detectable intra-tumor heterogeneity originates from private alterations acquired early during growth, and not from the later expansion of selected sub-clones. Hence, early sub-clones define the genomic profile of colorectal carcinomas and advanced adenomas, whereas potentially dangerous late-arising sub-clones will go undetected. Moreover, our results suggest that sub-clone mixing may be a biomarker of malignant potential. This new model provides a quantitative framework that explains the origins of intra-tumor heterogeneity and tumor growth dynamics with significant clinical implications. Citation Format: Andrea Sottoriva, Haeyoun Kang, Zhicheng Ma, Trevor A. Graham, Matthew Salomon, Junsong Zhao, Paul Marjoram, Kim Siegmund, Michael F. Press, Darryl Shibata, Christina Curtis. A Big Bang model of human colorectal tumor growth. [abstract]. In: Proceedings of the AACR Special Conference on Computational and Systems Biology of Cancer; Feb 8-11 2015; San Francisco, CA. Philadelphia (PA): AACR; Cancer Res 2015;75(22 Suppl 2):Abstract nr B2-23." @default.
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- W2401588986 date "2015-11-15" @default.
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- W2401588986 title "Abstract B2-23: A Big Bang model of human colorectal tumor growth" @default.
- W2401588986 doi "https://doi.org/10.1158/1538-7445.compsysbio-b2-23" @default.
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