Cellular redox environment-catalyzed ROS generation

Cellular redox environment-catalyzed ROS generation is a therapeutic mechanism, primarily utilized in Chemodynamic Therapy (CDT), that exploits the unique biochemical landscape of diseased cells—such as the high hydrogen peroxide (H2O2) levels and acidic pH found in the tumor microenvironment (TME)—to produce cytotoxic reactive oxygen species (ROS) (Tang et al., 2019, PMID: 30633443). This process typically involves the administration of redox-active agents or metal-based nanoparticles (e.g., iron, copper, or manganese) that catalyze Fenton or Fenton-like reactions, converting endogenous H2O2 into highly reactive hydroxyl radicals (.OH) (Huo et al., 2019, PMID: 31161763). These radicals cause extensive oxidative damage to cellular components, including DNA, proteins, and lipids, ultimately triggering cell death pathways such as apoptosis or ferroptosis (Li et al., 2020, PMID: 32693325). While this approach offers high selectivity by targeting the specific "redox signature" of cancer cells, its efficacy can be hindered by robust cellular antioxidant systems, particularly the glutathione (GSH) and thioredoxin pathways, which neutralize ROS and maintain redox homeostasis (Trachootham et al., 2009, PMID: 19472541). Consequently, modern strategies often combine redox-catalyzed ROS generation with GSH-depleting agents to enhance therapeutic outcomes (Lin et al., 2019, PMID: 31502711).

Other names

Redox-responsive ROS generationChemodynamic therapy (CDT)Tumor microenvironment-catalyzed oxidative stressRedox-activated ROS production

Induction of oxidative stress via Fenton or Fenton-like reactions catalyzed by the intracellular or microenvironmental redox conditions (e.g., high H2O2, low pH).