Lipid peroxidation products and membrane lipid radicals (LPO products)

Lipid peroxidation products and membrane lipid radicals are reactive chemical species generated during the oxidative degradation of lipids, particularly polyunsaturated fatty acids (PUFAs) in cellular membranes. This process is typically initiated by reactive oxygen species (ROS) or enzymes like lipoxygenases, leading to a self-propagating chain reaction that produces lipid hydroperoxides and highly reactive aldehydes such as malondialdehyde (MDA) and 4-hydroxynonenal (4-HNE) (PMID: 24903357). These products can damage membrane integrity, alter fluidity, and form covalent adducts with proteins and DNA, thereby disrupting cellular function and signaling (PMID: 20170510). Lipid peroxidation is a central execution mechanism of ferroptosis, a form of regulated cell death characterized by iron-dependent lipid peroxide accumulation (PMID: 28985560). It is heavily implicated in the pathogenesis of neurodegenerative diseases, atherosclerosis, and ischemia-reperfusion injury (PMID: 22582031). Therapeutic interventions focus on radical-trapping antioxidants (RTAs) and lipophilic scavengers that terminate the peroxidation chain, thereby protecting cells from oxidative collapse (PMID: 27314329). Additionally, enzymes like Glutathione Peroxidase 4 (GPX4) naturally neutralize these products, making the lipid peroxidation pathway a key focus for drug development in oncology and degenerative conditions.

Other names

Lipid peroxidesLipid hydroperoxidesReactive lipid speciesLipid-derived electrophilesLipid radicalsOxidized lipids

Radical scavenging, termination of lipid peroxidation chain reactions, and neutralization of reactive electrophilic aldehydes.