Cellular redox metabolism and reactive oxygen species production machinery (ROS/Redox Machinery)

The cellular redox metabolism and reactive oxygen species (ROS) production machinery is an integrated network of enzymes and pathways that regulate the balance between oxidant generation and antioxidant defense (Sies et al., 2017). Key components include ROS-generating enzymes such as NADPH oxidases (NOX), xanthine oxidase, and the mitochondrial electron transport chain, which are counterbalanced by antioxidant systems like superoxide dismutase (SOD), catalase, and the glutathione/thioredoxin pathways (Finkel, 2011). This machinery is vital for physiological signaling (oxidative eustress), where low levels of ROS regulate cell proliferation and differentiation; however, its dysregulation leads to oxidative distress and macromolecular damage (Murphy, 2009). Chronic oxidative stress is a central driver in the pathogenesis of cancer, neurodegeneration, and cardiovascular diseases (Holmström & Finkel, 2014). Pharmacological strategies targeting this system include direct ROS scavengers, mitochondria-targeted antioxidants like MitoQ, and Nrf2 activators that bolster endogenous defenses, though the challenge remains to selectively target pathological ROS without impairing essential signaling (Chandel & Tuveson, 2014).

Other names

Redox homeostasis systemOxidative stress machineryROS generating systemAntioxidant defense systemRedoxome

Modulation of cellular redox state through the inhibition of ROS-generating enzymes, direct scavenging of reactive species, or the induction of antioxidant gene expression via the Nrf2 pathway.