DNA in hypoxic cell (null)

"DNA in hypoxic cells" refers to the chromosomal DNA found in cells experiencing low oxygen (hypoxic) conditions, commonly within solid tumors. Hypoxia in the tumor microenvironment alters the regulation of numerous DNA repair pathways (such as homologous recombination, non-homologous end-joining, and base excision repair), leading to increased genomic instability and mutation rates[1][3][8]. Although DNA itself is not considered a conventional druggable target (like an enzyme or receptor), the altered DNA repair mechanisms in hypoxic cells have been exploited in cancer therapy to induce selective cytotoxicity, particularly by inhibiting repair enzymes or using DNA-damaging agents[2][4][8]. DNA in hypoxic cells is associated with resistance to radiotherapy and chemotherapy because of reduced repair and cell cycle arrest, and targeting the unique vulnerabilities of hypoxic tumor DNA (such as increased replication stress and downregulation of repair factors) is a strategy in the development of new anticancer therapies[3][8]. Thus, "DNA in hypoxic cells" is a context for therapeutic intervention, not a singular molecular target.

Other names

Genomic DNA in hypoxic cellDNA under hypoxic conditionsDNA in low oxygenCellular DNA in hypoxia

Indirect targeting via inhibition of DNA repair (e.g., PARP inhibitors increase cytotoxicity in hypoxic cells by blocking repair of DNA breaks)[2][8]\nExploiting hypoxia-induced DNA repair deficiencies to increase sensitivity to chemotherapy/radiotherapy[3][8]\nInduction of synthetic lethality by combining DNA repair inhibitors with hypoxia-targeting treatments[8]