Lipid peroxide

**Lipid peroxides** are not a single molecular target but rather a class of reactive oxygen species-derived products formed during the oxidative degradation of lipids, especially polyunsaturated fatty acids in biological membranes. The process—known as **lipid peroxidation**—involves three main stages: initiation by free radicals or enzymatic activity, propagation through chain reactions generating more radicals and hydroperoxides, and termination when antioxidants neutralize the reactive intermediates. The primary end-products are **lipid hydroperoxides**, which can further decompose into secondary toxic aldehydes such as malondialdehyde (MDA) and 4-hydroxynonenal (4-HNE)[1][2][6].\n\nLipid peroxide accumulation disrupts membrane structure and function, modifies proteins/DNA bases, triggers cell death pathways like apoptosis or ferroptosis, and acts as a signaling mediator at low concentrations[2][4]. Excessive levels contribute to pathologies including cancer, neurodegeneration, cardiovascular diseases, and inflammation[6]. While not themselves therapeutic targets like receptors or enzymes—they are instead considered biomarkers or mediators—their formation is central to many drug mechanisms involving antioxidants or inhibitors of oxidative stress.\n\nBecause \"lipid peroxide\" refers to a chemical species rather than a discrete protein/gene target with canonical structure/function/abbreviation/family classification—and because it is often used interchangeably with its process (\"lipid peroxidation\")—it does not fit standard drug target conventions. Thus:\n\n\"Lipid peroxide\" is not considered a canonical therapeutic target such as an enzyme or receptor; it represents a class of reactive molecules produced during oxidative stress.\n\nReferences supporting these statements include detailed mechanistic reviews on lipid peroxidation chemistry[1], its role in regulated cell death processes like ferroptosis[2], clinical biomarker use for MDA/4-HNE quantification[1], dual physiological/pathological effects at different concentrations[4], involvement in immune/cancer biology[6], and general overviews on the topic from biomedical sources.[7]

Other names

Lipid hydroperoxideLOOHphospholipid hydroperoxide (PLOOH)lipid peroxidation product

Scavenging or reducing lipid peroxides to prevent oxidative damage and cell death