DNA and DNA polymerases

DNA and DNA polymerases constitute the fundamental apparatus for genomic replication, particularly critical in rapidly dividing or proliferating cells (StatPearls, 2023). DNA polymerases, such as types alpha, delta, and epsilon, are enzymes that catalyze the synthesis of DNA by adding deoxyribonucleotides to a primer-template junction (UniProt, 2024). In oncology, this machinery is a classic therapeutic target because cancer cells proliferate at higher rates than most normal cells, making them more susceptible to interference with DNA synthesis (NCI, 2023). Drugs targeting this complex include antimetabolites like Gemcitabine that mimic natural nucleotides to inhibit polymerase function or induce DNA strand breaks (PubChem, 2024). Other agents, such as platinum-based compounds, interact directly with the DNA template to form adducts that stall the replication machinery (PubMed, 2022). While highly effective against malignant growth, these targets are also present in healthy proliferating tissues like bone marrow and the intestinal lining, leading to systemic toxicities like myelosuppression (Mayo Clinic, 2023).

Other names

DNA replication machineryDNA synthesis complexReplicative DNA polymerasesDNA-polymerase complex

Inhibition of DNA polymerase activity through competitive binding with natural nucleotides, incorporation into the nascent DNA strand causing premature chain termination, and direct covalent binding to DNA templates to prevent replication fork progression (StatPearls, 2023; PubChem, 2024).