Bulk cellular DNA and nearby cellular macromolecules (DNA)

Bulk cellular DNA and nearby cellular macromolecules serve as the primary therapeutic targets for a wide array of cytotoxic chemotherapies and radiation therapy (NCI, 2023). This target complex includes the nuclear genome, mitochondrial DNA, and associated structural proteins such as histones and the nuclear matrix, which together maintain the integrity and accessibility of genetic information (Nature Reviews Cancer, 2007). Biological functions of this target include the storage of genetic code, DNA replication, and RNA transcription, all of which are essential for cell survival and proliferation (StatPearls, 2023). In the context of disease, particularly cancer, these processes are often dysregulated, making the DNA a vulnerable site for intervention. Drugs like cisplatin and cyclophosphamide interact with DNA by forming covalent crosslinks or alkyl groups, effectively stalling the replication machinery and triggering apoptosis (PubChem, 2024). Additionally, ionizing radiation targets this complex by generating free radicals that cause extensive oxidative damage to DNA and adjacent macromolecules like lipids and proteins (NIH, 2022). Because these treatments lack high specificity for malignant cells, they are associated with significant safety concerns, including myelosuppression and the risk of secondary primary malignancies (PubMed, 2021).

Other names

Genomic DNANuclear DNAChromatinCellular macromolecules

DNA alkylation, DNA cross-linking, DNA intercalation, Induction of double-strand breaks, Inhibition of DNA synthesis and repair