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Updated: Dec 29, 2025
11:02
Detecting Somatic Genetic Alterations in Tumor Specimens by Exon Capture and Massively Parallel Sequencing
Published on: October 18, 2013
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Patterns of somatic structural variation in human cancer genomes
Yilong Li1,2, Nicola D Roberts1, Jeremiah A Wala3,4,5
1Cancer Genome Project, Wellcome Trust Sanger Institute, Hinxton, UK.
Nature
|February 7, 2020
Summary
Cancer involves structural variations, which are genomic rearrangements. Researchers identified 16 distinct structural variation signatures across thousands of cancers, revealing complex genomic alterations driving cancer development.
Area of Science:
- Genomics
- Cancer Biology
- Bioinformatics
Background:
- Structural variation is a major driver of cancer development.
- Understanding these genomic rearrangements is crucial for cancer research.
Purpose of the Study:
- To develop methods for grouping, classifying, and describing somatic structural variants.
- To analyze structural variation signatures in a large cancer cohort.
Main Methods:
- Utilized whole-genome sequencing data from the Pan-Cancer Analysis of Whole Genomes (PCAWG) Consortium.
- Applied novel computational methods to identify and characterize structural variants.
- Analyzed data from 2,658 cancers across 38 tumor types.
Main Results:
- Identified 16 distinct signatures of structural variation.
- Characterized deletions, tandem duplications, and unbalanced translocations, noting their distinct genomic distributions and replication timing.
- Discovered templated insertion cycles correlating with tandem duplications and TERT activation in liver cancer.
Conclusions:
- Multiple rearrangement mechanisms contribute to cancer genome complexity.
- Structural variations create diverse genomic configurations that are subject to selective pressures in cancer.
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