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Inhibition of Oxidative and Antioxidative Enzymes by Trans-Resveratrol

Trans-resveratrol, a phytoalexin produced by a variety of plants, has been shown to inhibit oxidative enzymes in an animal cell system. Its effect on several oxidative and antioxidative enzymes from plants was investigated using in vitro assays. Trans-resveratrol inhibited superoxide dismutase, lipoxygenase, catalase, peroxi- dase, polyphenol oxidase, and 1-aminocyclopropane-1-carboxylic acid oxidase with apparent K I 's of 10, 90, 100, 255, 305, and 350 M, respectively. Trans-resveratrol inhibited lipoxygenase activity more effectively than other lipoxygenase inhibitors, including propyl gallate, ibuprofen, ursolic acid, acetylsalicylic acid, and salicylhydroxamic acid.