Redox regulation systems

Redox regulation systems represent a sophisticated network of enzymes, cofactors, and signaling pathways essential for maintaining cellular redox homeostasis and protecting against oxidative damage. The primary components include the thioredoxin (Trx) and glutathione (GSH) systems, which utilize reducing equivalents from NADPH to neutralize reactive oxygen species (ROS) and maintain proteins in their functional reduced states [1, 10]. These systems are dynamically regulated by master transcription factors such as Nrf2, which orchestrates the antioxidant response by inducing the expression of protective enzymes like superoxide dismutase and catalase [1, 8]. In various pathologies, including cancer, neurodegeneration, and chronic inflammation, these systems are often dysregulated; for example, cancer cells frequently upregulate redox defenses to survive high metabolic stress and evade apoptosis [3, 4]. Therapeutic strategies targeting these systems involve either the activation of antioxidant pathways to mitigate tissue damage or the inhibition of redox defenses to selectively sensitize diseased cells to oxidative stress-induced death [2, 14].

Other names

Antioxidant systemsRedox homeostasis systemsCellular redox regulatory networkRedox signaling pathwaysAntioxidant defense system

Modulation of antioxidant enzyme activity, induction of phase II detoxification enzymes via Nrf2 activation, scavenging of reactive oxygen species (ROS), or depletion of cellular antioxidant capacity to induce oxidative stress-mediated apoptosis.