Lipid peroxidation products and membrane lipids (LPO)

Lipid peroxidation products and membrane lipids are critical mediators of oxidative stress and cellular damage. This process involves the oxidative degradation of polyunsaturated fatty acids (PUFAs) within cell membranes, initiated by reactive oxygen species (ROS) or enzymatic activity [1][2]. The resulting lipid hydroperoxides and reactive aldehydes, such as 4-hydroxynonenal (4-HNE) and malondialdehyde (MDA), can severely compromise membrane integrity and alter cellular signaling [1][3]. Accumulation of these products is a hallmark of ferroptosis, an iron-dependent form of regulated cell death that is distinct from apoptosis [4]. Clinically, excessive lipid peroxidation is linked to the pathogenesis of neurodegenerative diseases, cardiovascular disorders, and ischemia-reperfusion injury [5][6]. Therapeutic strategies aim to neutralize these reactive species using lipophilic antioxidants or radical-trapping agents like edaravone and ferrostatin-1 [7]. By preventing the propagation of lipid radical chains, these drugs protect the structural and functional properties of biological membranes [2][7]. Sources: [1] Ayala et al. (2014) Oxid Med Cell Longev; [2] Gaschler & Stockwell (2017) Biochem Biophys Res Commun; [3] PubChem (MDA/4-HNE); [4] Dixon et al. (2012) Cell; [5] Reed (2011) Free Radic Biol Med; [6] Yoshida et al. (2013) Free Radic Biol Med; [7] Skouta et al. (2014) Nat Chem Biol.

Other names

Oxidized lipidsLipid hydroperoxidesReactive lipid aldehydesMembrane phospholipidsPolyunsaturated fatty acid peroxides

Radical scavenging and inhibition of the autoxidative chain reaction within lipid bilayers to prevent membrane damage and ferroptotic cell death.