Abstract
Mammalian cells possess sophisticated genome surveillance and repair mechanisms, executed by the so-called DNA damage response (DDR), failure of which leads to accumulation of DNA damage and genomic instability. Mounting evidence suggests that bacterial infections can elicit DNA damage in host cells, and certain pathogens induce such damage as part of their multi-faceted infection programme. Bacteria-mediated DNA damage can occur either directly through the formation of toxins with genotoxic activities or indirectly as a result of the activation of cell-autonomous or immune defence mechanisms against the pathogen. Moreover, host-cell signalling routes involved in the DDR can be altered in response to an infection, and this, in the context of DNA damage elicited by the pathogen, has the potential to trigger mutations and cancer.
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