Reactive oxygen species and brain lipid oxidation processes (ROS/LPO)

Reactive oxygen species (ROS) and brain lipid oxidation processes refer to the biochemical cascade where highly reactive oxygen-containing molecules cause the oxidative degradation of lipids, particularly polyunsaturated fatty acids (PUFAs), within the central nervous system (Ayala et al., 2014, Oxidative Medicine and Cellular Longevity). The brain is uniquely vulnerable to this process due to its high oxygen consumption, high lipid content, and relatively modest antioxidant defenses (Halliwell, 2006, Lancet). When ROS like hydroxyl radicals react with membrane lipids, they initiate a self-propagating chain reaction that generates toxic byproducts such as malondialdehyde (MDA) and 4-hydroxynonenal (4-HNE), which can impair membrane integrity and protein function (Butterfield et al., 2001, Trends in Molecular Medicine). These processes are central to the pathogenesis of neurodegenerative conditions like Alzheimer's and Parkinson's diseases, as well as acute injuries like ischemic stroke (Cobley et al., 2018, Free Radical Biology and Medicine). Therapeutic strategies focus on neutralizing ROS through radical scavengers or inhibiting the propagation of lipid peroxidation to preserve neuronal health, with drugs like Edaravone being utilized in clinical settings for conditions like ALS (Watanabe et al., 1994, Journal of Pharmacology and Experimental Therapeutics).

Other names

Lipid peroxidationBrain oxidative stressROS-mediated lipid damageOxidative degradation of lipids

Drugs targeting these processes typically function as free radical scavengers, chain-breaking antioxidants, or metal chelators to prevent the initiation and propagation of lipid peroxidation.