Cellular membranes and reactive oxygen species

Cellular membranes and reactive oxygen species (ROS) describe a complex biochemical system where structural lipid bilayers interact with highly reactive oxygen-containing molecules. ROS, such as superoxide and hydroxyl radicals, are generated as metabolic byproducts in the mitochondria or by enzymes like NADPH oxidase (PMID: 28138081). When ROS production exceeds the cell's antioxidant capacity, they attack the polyunsaturated fatty acids within cellular membranes, initiating a self-propagating process known as lipid peroxidation (PMID: 30107164). This process compromises membrane fluidity, permeability, and the function of membrane-bound proteins, leading to cellular dysfunction or death. While not a single molecular target, this interaction is a critical driver in the pathogenesis of neurodegenerative diseases, cardiovascular disorders, and cancer (PMID: 24591303). Therapeutic strategies focus on using antioxidants or radical scavengers, such as Vitamin E or Edaravone, to neutralize ROS and terminate lipid peroxidation chains to preserve membrane integrity (PMID: 29211654). Consequently, this system represents a broad pathological mechanism rather than a specific protein receptor or enzyme target.

Other names

Oxidative stressLipid peroxidationMembrane oxidative damageROS-mediated membrane injuryRedox-active membrane environment

Drugs typically act by scavenging free radicals, inhibiting the chain reaction of lipid peroxidation, or enhancing endogenous antioxidant enzyme activity to protect membrane structural integrity.