eLife Assessment
This important work advances our understanding of DNA methylation and its consequences for susceptibility to DNA damage. This work presents evidence that DNA methylation can accentuate the genomic damage propagated by DNA damaging agents as well as potentially being an independent source of such damage. The experimental results reported are sound but the evidence presented to support the conclusions drawn is incomplete and other interpretations are possible. The work will be of broad interest to biochemists, cell and genome biologists.