Generation of reactive oxygen species

The "generation of reactive oxygen species" refers to a cellular process in which reactive oxygen species (ROS): highly reactive, short-lived oxygen-containing molecules—such as superoxide anion, hydrogen peroxide, and hydroxyl radical—are produced as byproducts of normal metabolism (especially mitochondrial respiration) and by dedicated enzymes (like NADPH oxidases) in response to various stimuli[1][5][4]. ROS act as signaling molecules at physiological levels, mediating processes like cell proliferation, differentiation, immune defense, and homeostasis[4][2][9]. When produced in excess, they contribute to oxidative stress, causing damage to DNA, proteins, and lipids, and are implicated in many diseases, including cancer, neurodegeneration, and cardiovascular disorders[1][5][9]. Strategies targeting ROS generation in disease have focused on antioxidants, modulation of ROS-generating enzymes, or activation of endogenous defense systems, though therapeutic outcomes are often mixed due to the dual (beneficial and harmful) roles of ROS in biology[7][4]. In summary, "generation of reactive oxygen species" is a process, not a direct molecular drug or receptor target, and should not be listed as a canonical drug target. Instead, individual enzymes or pathways (such as "NADPH oxidase", "mitochondrial respiratory chain complexes", or "myeloperoxidase") responsible for ROS production can be considered specific drug targets.

Other names

ROS productionROS generationoxidative burstreactive oxygen species formation

Drugs may scavenge ROS (antioxidants), upregulate antioxidant defense (NRF2 activators), or inhibit enzymes that produce ROS (NADPH oxidase inhibitors)