Lipid peroxyl radical in membrane (LOO·)

Lipid peroxyl radicals (LOO·) are short-lived, highly reactive intermediates produced during the propagation phase of lipid peroxidation in biological membranes. They arise when polyunsaturated fatty acid (PUFA) residues in phospholipids are attacked by reactive oxygen species, forming a lipid radical (L·) that rapidly reacts with molecular oxygen to yield a peroxyl radical (LOO·). These radicals propagate membrane lipid peroxidation chain reactions, resulting in structural and functional damage to cell membranes, and are implicated in various pathological processes including ferroptosis and regulated forms of cell death associated with neurodegenerative, cardiovascular, and inflammatory diseases. Lipid peroxyl radicals themselves are not considered conventional drug targets (e.g. receptors, enzymes), but mitigating their formation or effects via antioxidants (like vitamin E or melatonin) is a therapeutic strategy. Laboratory measurement of lipid peroxidation typically involves detection of downstream stable products such as malondialdehyde (MDA) or 4-hydroxynonenal (4-HNE). Clarification: "Lipid peroxyl radicals in membranes" is not a receptor, enzyme, or protein, but a reactive chemical species central to a pathological process (lipid peroxidation) and is not a classic therapeutic target itself. If you are seeking information on a specific enzyme that generates or removes lipid peroxyl radicals (e.g., Lipoxygenase, Glutathione peroxidase 4/GPX4, or Cytochrome P450 enzymes), please clarify the exact target.

Other names

Lipid hydroperoxyl radicalLOO·peroxyl radical

Scavenging of peroxyl radicals to interrupt the lipid peroxidation chain reaction