Oxidized lipid (No universally recognized abbreviation; sometimes OxPL or OxL.)

Oxidized lipids are a chemically diverse class of lipid molecules produced by enzymatic (e.g., lipoxygenases, cyclooxygenases) and non-enzymatic (e.g., free-radical mediated) oxidation of polyunsaturated fatty acids in cellular membranes and lipoproteins. They include oxidized phospholipids, cholesterol oxidation products (oxysterols), oxidized fatty acid metabolites (e.g., isoprostanes), and lipid peroxidation adducts (such as malondialdehyde and 4-HNE). Oxidized lipids play key roles as signaling mediators in inflammation, cell death, immune activation, and metabolic regulation, but in excess contribute to tissue injury and the development of cardiovascular, neurodegenerative, and other chronic diseases. Due to their immense chemical diversity, "oxidized lipid" is not a precise molecular target, but specific oxidized lipid species are increasingly recognized as disease biomarkers and potential drug targets within defined contexts.

Other names

Oxidized phospholipid (OxPL)Lipid peroxidation productOxidized fatty acidOxysterol (for oxidized cholesterol derivatives)Oxylipin (for oxygenated fatty acid derivatives)Lipid oxidation product

Drugs interact with oxidized lipids primarily through antioxidant scavenging to prevent or reduce their formation, inhibition of oxidative enzymes (e.g., targeting lipoxygenase/cyclooxygenase pathways), or neutralization/binding (e.g., via monoclonal antibodies to specific oxidized lipid species).