Oxidative stress pathways and redox-sensitive proteins

Oxidative stress pathways and redox-sensitive proteins represent a complex network of biochemical processes and molecular sensors dedicated to maintaining cellular redox homeostasis (NIH/NCBI). These pathways are activated by an imbalance between the production of reactive oxygen species (ROS) and the capacity of antioxidant defense systems to neutralize them (PubMed). Key components include transcription factors like Nuclear factor erythroid 2-related factor 2 (Nrf2), which regulates the expression of antioxidant and detoxification genes (UniProt Q16236). Redox-sensitive proteins often contain specific cysteine residues that act as molecular switches, undergoing reversible oxidative modifications to trigger downstream signaling cascades (PubMed). Dysregulation of these pathways is a hallmark of numerous pathologies, including cancer, neurodegeneration, and cardiovascular diseases, where chronic oxidative damage leads to cellular dysfunction (StatPearls). Therapeutic strategies often focus on modulating these pathways using Nrf2 activators like Dimethyl fumarate or ROS scavengers to restore balance (PubChem). However, the dual role of redox signaling in both health and disease presents significant challenges for achieving therapeutic selectivity (Nature Reviews Drug Discovery).

Other names

Redox signaling pathwaysAntioxidant response systemReactive oxygen species (ROS) signalingRedoxomeCellular redox homeostasis pathways

Modulation of antioxidant gene expression via the Nrf2-Keap1-ARE pathway, direct scavenging of reactive oxygen species, and covalent modification of redox-sensitive cysteine residues on target proteins to alter signaling activity.