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• W4361945614 abstract "<div>Abstract<p><b>Purpose:</b> The intratumoral heterogeneity (ITH) and the evolution of genomic architectures associated with the development of distant metastases are not well understood in colorectal cancers.</p><p><b>Experimental Design:</b> We performed multiregion biopsies of primary and liver metastatic regions from five colorectal cancers with whole-exome sequencing and copy number profiling.</p><p><b>Results:</b> In addition to a substantial level of genetic ITH, multiregion genetic profiling identifies the subclonal mutational architecture, leading to the region-based or spatial categorization of somatic mutations and the inference of intratumoral evolutionary history of cancers. The universal mutations (those observed in all the regional biopsies) are enriched in known cancer genes such as <i>APC</i> and <i>TP53</i> with distinct mutational spectra compared with biopsy- or region-specific mutations, suggesting that major operative mutational mechanisms and their selective pressures are not constant across the metastatic progression. The phylogenies inferred from genomic data show branching evolutionary patterns where some primary biopsies are often segregated with metastastic lesions. Our analyses also revealed that copy number changes such as the chromosomal gains of <i>c-MYC</i> and chromothripsis can be region specific and the potential source of genetic ITH.</p><p><b>Conclusions:</b> Our data show that the genetic ITH is prevalent in colorectal cancer serving as a potential driving force to generate metastasis-initiating clones and also as a means to infer the intratumoral evolutionary history of cancers. The paucity of recurrent metastasis-clonal events suggests that colorectal cancer distant metastases may not follow a uniform course of genomic evolution, which should be considered in the genetic diagnosis and the selection of therapeutic targets for the advanced colorectal cancer. <i>Clin Cancer Res; 21(19); 4461–72. ©2015 AACR</i>.</p></div>" @default.
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• W4361945614 date "2023-03-31" @default.
• W4361945614 modified "2023-10-18" @default.
• W4361945614 title "Data from Subclonal Genomic Architectures of Primary and Metastatic Colorectal Cancer Based on Intratumoral Genetic Heterogeneity" @default.
• W4361945614 doi "https://doi.org/10.1158/1078-0432.c.6524223" @default.
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