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• W3012247811 abstract "Characterizing intratumor heterogeneity (ITH) is crucial to understanding cancer development, but it is hampered by limits of available data sources. Bulk DNA sequencing is the most common technology to assess ITH, but involves the analysis of a mixture of many genetically distinct cells in each sample, which must then be computationally deconvolved. Single-cell sequencing is a promising alternative, but its limitations—for example, high noise, difficulty scaling to large populations, technical artifacts, and large data sets—have so far made it impractical for studying cohorts of sufficient size to identify statistically robust features of tumor evolution. We have developed strategies for deconvolution and tumor phylogenetics combining limited amounts of bulk and single-cell data to gain some advantages of single-cell resolution with much lower cost, with specific focus on deconvolving genomic copy number data. We developed a mixed membership model for clonal deconvolution via non-negative matrix factorization balancing deconvolution quality with similarity to single-cell samples via an associated efficient coordinate descent algorithm. We then improve on that algorithm by integrating deconvolution with clonal phylogeny inference, using a mixed integer linear programming model to incorporate a minimum evolution phylogenetic tree cost in the problem objective. We demonstrate the effectiveness of these methods on semisimulated data of known ground truth, showing improved deconvolution accuracy relative to bulk data alone." @default.
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• W3012247811 date "2020-04-01" @default.
• W3012247811 modified "2023-10-09" @default.
• W3012247811 title "Tumor Copy Number Deconvolution Integrating Bulk and Single-Cell Sequencing Data" @default.
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• W3012247811 doi "https://doi.org/10.1089/cmb.2019.0302" @default.
• W3012247811 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7185355" @default.
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