In vitro: |
Records of Natural Products, 2016, 10(1):109-112. | Stemona alkaloids isolated from Stemona tuberosa roots and their inhibitory activity on lipopolysaccharide-induced nitric oxide production[Reference: WebLink] | METHODS AND RESULTS:
A methanol extract of the roots of Stemona tuberosa (Stemonaceae) significantly inhibited lipopolysaccharide-induced nitric oxide production in murine BV2 microglial cells. Eight alkaloids tuberostemonine K (1), neotuberostemonine (2), oxotuberostemonine (3), Bisdehydroneotuberostemonine (4), epibisdehydrotuberostemonine J (5), bisdehydrotuberostemonine (6), tuberostemoninol (7), and neostenine (8) were isolated from the methanolic extract using bioactivity-guided fractionation. CONCLUSIONS: Among them, compounds 4, 5 and 6 showed significant inhibitory effect on lipopolysaccharide-induced nitric oxide production in BV2 microglia at 100 μM. |
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