Abstract:
:Recent studies indicate that a subclass of APOBEC cytidine deaminases, which convert cytosine to uracil during RNA editing and retrovirus or retrotransposon restriction, may induce mutation clusters in human tumors. We show here that throughout cancer genomes APOBEC-mediated mutagenesis is pervasive and correlates with APOBEC mRNA levels. Mutation clusters in whole-genome and exome data sets conformed to the stringent criteria indicative of an APOBEC mutation pattern. Applying these criteria to 954,247 mutations in 2,680 exomes from 14 cancer types, mostly from The Cancer Genome Atlas (TCGA), showed a significant presence of the APOBEC mutation pattern in bladder, cervical, breast, head and neck, and lung cancers, reaching 68% of all mutations in some samples. Within breast cancer, the HER2-enriched subtype was clearly enriched for tumors with the APOBEC mutation pattern, suggesting that this type of mutagenesis is functionally linked with cancer development. The APOBEC mutation pattern also extended to cancer-associated genes, implying that ubiquitous APOBEC-mediated mutagenesis is carcinogenic.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Roberts SA,Lawrence MS,Klimczak LJ,Grimm SA,Fargo D,Stojanov P,Kiezun A,Kryukov GV,Carter SL,Saksena G,Harris S,Shah RR,Resnick MA,Getz G,Gordenin DAdoi
10.1038/ng.2702subject
Has Abstractpub_date
2013-09-01 00:00:00pages
970-6issue
9eissn
1061-4036issn
1546-1718pii
ng.2702journal_volume
45pub_type
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