Effects of long-chain N-acylethanolamines on lipid peroxidation in cardiac mitochondria.

A long-chain N-acylethanolamine (N-oleoyl-2-aminoethanol) is shown to inhibit the production of thiobarbituric acid-reactive substances in rat heart mitochondria treated with Fe2+ or Fe3+/ADP. The inhibition is concentration-dependent in the range 50-150 microM of the agent and can be nearly complete depending on the type and amount of the free radical-generating system. Structural analogues of N-acylethanolamine are inhibitory as well, but neither oleic acid nor ethanol-amine has measurable effects. N-Oleoyl-2-aminoethanol affects peroxidation of linoleic acid micelles only minimally and has no effect on deoxyribose peroxidation.