New Secoisolariciresinol Derivatives from Lindera obtusiloba Stems and Their Neuroprotective Activities

Abstract

A methanolic extract of Lindera obtusiloba (Lauraceae) stems significantly attenuated glutamate-induced oxidative stress in HT22 hippocampal cells. Two new secoisolariciresinol derivatives, characterized as 9,9′-O-di-(E)-feruloyl-meso-5,5′-dimethoxysecoisolariciresinol (1) and 9,9′-O-di-(E)-sinapinoyl-meso-5,5′-dimethoxysecoisolariciresinol (2), were isolated, along with the known compound 9,9′-O-di-(E)-feruloyl-meso-secoisolariciresinol (3), from the methanolic extract of L. obtusiloba stems. Compounds 1, 2, and 3 showed neuroprotective effects on glutamate-induced toxicity in HT22 cells.

Key words

Lindera obtusiloba - Lauraceae - HT22 hippocampal cells - neuroprotective - lignan

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