| In vitro: |
| Chemistry & Biodiversity, 2017, 14(11). | | Constituents from Scutellaria barbata Inhibiting Nitric Oxide Production in LPS-Stimulated Microglial Cells.[Reference: WebLink] |
METHODS AND RESULTS:
The arial parts of Scutellaria barbata D. Don (Lamiaceae) efficiently inhibited NO production in BV2 microglial cells, and the active constituents were further isolated based on activity-guided isolation using silica-gel column chromatography, RP-C18 MPLC and prep-HPLC. As the results, 2 flavonoids including 6-methoxynaringenin (1) and 6-O-methylscutellarein (5), and 6 neo-clerodane diterpenes such as scutebarbatine W (2), scutebata B (3), scutebarbatine B (4), scutebarbatine A (6), 6-O-nicotinolylscutebarbatine G (7) and scutebarbatine X (8) were isolated. The structures of these compounds were elucidated based on NMR and MS data, and the comparison of literature values. All the compounds except compound 7 inhibited NO production efficiently with IC50 values of lower than 50 μM. Particularly, compound 1 and 8 were the most efficient with IC50 values of 25.8 and 27.4 μM, respectively.
CONCLUSIONS:
This is the first report suggesting the potential of S. barbata on the reduction of neuroinflammation. |
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