Subclonal Genomic Architectures of Primary and Metastatic Colorectal Cancer Based on Intratumoral Genetic Heterogeneity
| العنوان: | Subclonal Genomic Architectures of Primary and Metastatic Colorectal Cancer Based on Intratumoral Genetic Heterogeneity |
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| المؤلفون: | Chang Hyeok An, Yeun-Jun Chung, Sung Hak Lee, Sug-Hyung Lee, Seung-Hyun Jung, Min Sung Kim, Sung-Won Park, Tae-Min Kim, Je-Keun Rhee, In-Pyo Baek |
| المصدر: | Clinical Cancer Research. 21:4461-4472 |
| بيانات النشر: | American Association for Cancer Research (AACR), 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Cancer Research, DNA Copy Number Variations, Colorectal cancer, Biopsy, DNA Mutational Analysis, Biology, Bioinformatics, Intratumoral Genetic Heterogeneity, Genetic Heterogeneity, medicine, Cluster Analysis, Humans, Exome, Neoplasm Metastasis, Genetic Association Studies, Phylogeny, Neoplasm Staging, Comparative Genomic Hybridization, Chromothripsis, medicine.diagnostic_test, Genetic heterogeneity, Liver Neoplasms, Chromosome Mapping, High-Throughput Nucleotide Sequencing, Genomics, medicine.disease, Oncology, Mutation, Cancer research, Colorectal Neoplasms, Microsatellite Repeats, Comparative genomic hybridization |
| الوصف: | Purpose: The intratumoral heterogeneity (ITH) and the evolution of genomic architectures associated with the development of distant metastases are not well understood in colorectal cancers. Experimental Design: We performed multiregion biopsies of primary and liver metastatic regions from five colorectal cancers with whole-exome sequencing and copy number profiling. Results: 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 APC and TP53 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 c-MYC and chromothripsis can be region specific and the potential source of genetic ITH. Conclusions: 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. Clin Cancer Res; 21(19); 4461–72. ©2015 AACR. |
| تدمد: | 1557-3265 1078-0432 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da572171eff88b78b1752d9b06691e99Test https://doi.org/10.1158/1078-0432.ccr-14-2413Test |
| رقم الانضمام: | edsair.doi.dedup.....da572171eff88b78b1752d9b06691e99 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15573265 10780432 |
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