Reactive oxygen species formation (ROS formation)

Reactive oxygen species formation refers to the process by which molecular oxygen (O₂) is converted into highly reactive chemical species such as superoxide (O₂·⁻), hydrogen peroxide (H₂O₂), hydroxyl radical (·OH), and singlet oxygen (^1O₂), primarily through mitochondrial respiration, enzyme-mediated redox reactions (e.g., NADPH oxidases, xanthine oxidase), and exposure to exogenous stressors (e.g., ionizing radiation, infection, environmental toxins)[1][3][4][5][6][7]. These ROS play dual roles in biology: at low physiological levels, they act as second messengers coordinating cell signaling, proliferation, differentiation, and immune responses; at higher levels, they induce oxidative damage to DNA, lipids, and proteins, contributing to various pathologies (inflammation, cancer, neurodegeneration, cardiovascular disease)[1][3][5][6]. Therapeutic approaches often target the modulation of ROS formation through antioxidants, enzyme inhibitors, or redox signaling adjustment with varying degrees of efficacy and notable safety challenges[4][6].

Other names

ROS generationROS productionoxidative stress

ROS scavenging (antioxidants neutralize ROS) Inhibition of ROS-producing enzymes (e.g., NADPH oxidase inhibitors reduce ROS production) Induction of apoptosis via increased ROS (some drugs increase ROS to drive cell death) Cell signaling modulation (targeting ROS impacts pathways like MAPK, PI3K/Akt)