Cellular DNA and other macromolecular structures (DNA)

Cellular DNA and other macromolecular structures represent a broad class of non-protein therapeutic targets essential for the storage and expression of genetic information. DNA serves as the primary template for replication and transcription, processes that are fundamental to cell survival and proliferation. In clinical practice, these structures are primarily targeted by cytotoxic chemotherapy agents used to treat various forms of cancer. These drugs, such as alkylating agents and platinum-based compounds, induce structural damage or chemical modifications to the DNA, which halts the cell cycle and induces apoptosis in rapidly dividing cells. While highly effective at reducing tumor burden, the non-specific nature of targeting genomic DNA often results in significant toxicity to healthy, rapidly renewing tissues like bone marrow and the intestinal epithelium. Additionally, long-term exposure to DNA-damaging agents carries a risk of inducing new mutations that may lead to secondary cancers.

Other names

Deoxyribonucleic acidGenomic DNANuclear DNAMacromolecular targetsNucleic acids

Drugs targeting these structures typically act via covalent DNA cross-linking, alkylation of nucleotide bases, or intercalation between base pairs. These actions physically obstruct the DNA double helix, preventing the progression of DNA polymerase and RNA polymerase. This leads to the inhibition of DNA replication and RNA synthesis, eventually triggering DNA damage response pathways and programmed cell death (apoptosis).