Abstract
Sauchinone is a lignan isolated from Saururus chinensis known to suppress nitric oxide (NO) activity. Previous studies demonstrate that NO plays a key role in methamphetamine-induced neurotoxicity. Thus, we hypothesized that sauchinone could have a suppressive effect on the neurotoxicity induced by methamphetamine. Repeated injections of methamphetamine cause degeneration of dopaminergic nerve terminals, whereas sauchinone treatment significantly prevented this degeneration. Sauchinone treatment also inhibited the methamphetamine-induced activation of glia cells and the production of NO via a blockade of inducible NO synthase protein expression. Our results suggest that sauchinone can prevent methamphetamine-induced neurotoxicity through the suppression of NO production.
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