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Region Hovedstaden - en del af Københavns Universitetshospital
Udgivet

Disruption of chromatin folding domains by somatic genomic rearrangements in human cancer

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DOI

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  • PCAWG-Structural Variation Working Group
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Chromatin is folded into successive layers to organize linear DNA. Genes within the same topologically associating domains (TADs) demonstrate similar expression and histone-modification profiles, and boundaries separating different domains have important roles in reinforcing the stability of these features. Indeed, domain disruptions in human cancers can lead to misregulation of gene expression. However, the frequency of domain disruptions in human cancers remains unclear. Here, as part of the Pan-Cancer Analysis of Whole Genomes (PCAWG) Consortium of the International Cancer Genome Consortium (ICGC) and The Cancer Genome Atlas (TCGA), which aggregated whole-genome sequencing data from 2,658 cancers across 38 tumor types, we analyzed 288,457 somatic structural variations (SVs) to understand the distributions and effects of SVs across TADs. Notably, SVs can lead to the fusion of discrete TADs, and complex rearrangements markedly change chromatin folding maps in the cancer genomes. Notably, only 14% of the boundary deletions resulted in a change in expression in nearby genes of more than twofold.

OriginalsprogEngelsk
TidsskriftNature Genetics
Vol/bind52
Udgave nummer3
Sider (fra-til)294-305
Antal sider12
ISSN1061-4036
DOI
StatusUdgivet - mar. 2020
Eksternt udgivetJa

ID: 59265807