Lipid peroxidation: Mechanisms, inhibition, and biological effects

• Published in: Biochemical and biophysical research communications Vol. 338; no. 1; pp. 668 - 676
• Main Authors: Niki, Etsuo, Yoshida, Yasukazu, Saito, Yoshiro, Noguchi, Noriko
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 09.12.2005
• Subjects: Animals; Antioxidant; Cholesterol; HODE; Humans; Linoleic acid; Lipid peroxidation; Lipid Peroxidation - physiology; Lipid Peroxides - antagonists & inhibitors; Lipid Peroxides - chemistry; Lipid Peroxides - metabolism; Lipid Peroxides - physiology; Oxysterols; Vitamin E; Vitamin E; Oxysterols; Lipid peroxidation; HODE; Antioxidant; Cholesterol; Linoleic acid
• ISSN: 0006-291X; 1090-2104
• DOI: 10.1016/j.bbrc.2005.08.072

In the last 50 years, lipid peroxidation has been the subject of extensive studies from the viewpoints of mechanisms, dynamics, product analysis, involvement in diseases, inhibition, and biological signaling. Lipids are oxidized by three distinct mechanisms; enzymatic oxidation, non-enzymatic, free radical-mediated oxidation, and non-enzymatic, non-radical oxidation. Each oxidation mechanism yields specific products. The oxidation of linoleates and cholesterol is discussed in some detail. The relative susceptibilities of lipids to oxidation depend on the reaction milieu as well as their inherent structure. Lipid hydroperoxides are formed as the major primary products, however they are substrates for various enzymes and they also undergo various secondary reactions. Phospholipid hydroperoxides, for example, are reduced to the corresponding hydroxides by selenoproteins in vivo. Various kinds of antioxidants with different functions inhibit lipid peroxidation and the deleterious effects caused by the lipid peroxidation products. Furthermore, the biological role of lipid peroxidation products has recently received a great deal of attention, but its physiological significance must be demonstrated in future studies.