DNA methylation interference causing strand breaks leading to apoptosis

The phrase "DNA methylation interference causing strand breaks leading to apoptosis" does not refer to any single molecule or canonical drug target. Instead, it describes an epigenetic mechanism where disruption or inhibition of normal DNA methylation processes, often through inhibition or loss-of-function mutations affecting enzymes like DNA methyltransferases (DNMTs), results in increased susceptibility to double-strand break formation, defective repair pathways, and ultimately triggers programmed cell death (apoptosis) if damage cannot be resolved. Such mechanisms are exploited by certain anti-cancer agents known as DNMT inhibitors; however, there is no unique protein/receptor called “DNA methylation interference.” The concept encompasses multiple proteins involved in epigenetic regulation and genome maintenance rather than one discrete therapeutic target.

For drugs like azacitidine/decitabine: - Inhibition of DNA methyltransferases leads to hypomethylation of DNA. - This can cause reactivation of silenced genes but also induce cytotoxicity via incorporation into nucleic acids and induction of double-strand breaks and apoptosis.