Next-generation sequencing of apoptotic DNA breakpoints reveals association with actively transcribed genes and gene translocations.

oleh: Melissa J Fullwood, Joanne Lee, Lifang Lin, Guoliang Li, Mikael Huss, Patrick Ng, Wing-Kin Sung, Shirish Shenolikar

Format: Article
Diterbitkan: Public Library of Science (PLoS) 2011-01-01

Deskripsi

DNA fragmentation is a well-recognized hallmark of apoptosis. However, the precise DNA sequences cleaved during apoptosis triggered by distinct mechanisms remain unclear. We used next-generation sequencing of DNA fragments generated in Actinomycin D-treated human HL-60 leukemic cells to generate a high-throughput, global map of apoptotic DNA breakpoints. These data highlighted that DNA breaks are non-random and show a significant association with active genes and open chromatin regions. We noted that transcription factor binding sites were also enriched within a fraction of the apoptotic breakpoints. Interestingly, extensive apoptotic cleavage was noted within genes that are frequently translocated in human cancers. We speculate that the non-random fragmentation of DNA during apoptosis may contribute to gene translocations and the development of human cancers.