Rxivist combines preprints from bioRxiv with data from Twitter to help you find the papers being discussed in your field. Currently indexing 64,934 bioRxiv papers from 287,775 authors.
Pan-cancer analysis of whole genomes reveals driver rearrangements promoted by LINE-1 retrotransposition in human tumours
Eva G. Alvarez,
Young Seok Ju,
Alicia L. Bruzos,
Stefan C. Dentro,
Miguel G. Blanco,
Nicola D. Roberts,
Paul A. W. Edwards,
Eunjung Alice Lee,
Jeremiah A. Wala,
Sebastian M Waszak,
Fabio C. P. Navarro,
Steven E Schumacher,
Peter J Park,
Jan O Korbel,
Rebecca C Fitzgerald,
Peter Van Loo,
Haig H. Kazazian,
Kathleen H. Burns,
Peter J. Campbell,
Jose M. C. Tubio,
on behalf of the PCAWG Structural Variation Working Group,
the ICGC/TCGA Pan-Cancer Analysis of Whole Genomes Network
Posted 24 Aug 2017
bioRxiv DOI: 10.1101/179705
Posted 24 Aug 2017
About half of all cancers have somatic integrations of retrotransposons. To characterize their role in oncogenesis, we analyzed the patterns and mechanisms of somatic retrotransposition in 2,954 cancer genomes from 37 histological cancer subtypes. We identified 19,166 somatically acquired retrotransposition events, affecting 35% of samples, and spanning a range of event types. L1 insertions emerged as the first most frequent type of somatic structural variation in esophageal adenocarcinoma, and the second most frequent in head-and-neck and colorectal cancers. Aberrant L1 integrations can delete megabase-scale regions of a chromosome, sometimes removing tumour suppressor genes, as well as inducing complex translocations and large-scale duplications. Somatic retrotranspositions can also initiate breakage-fusion-bridge cycles, leading to high-level amplification of oncogenes. These observations illuminate a relevant role of L1 retrotransposition in remodelling the cancer genome, with potential implications in the development of human tumours.
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