6-O-Nicotinoylscutebarbatine G
6-O-Nicotinoylscutebarbatine G shows cytotoxic activities against three human tumor cell lines, namely, HONE-1 nasopharyngeal, KB oral epidermoid carcinoma, and HT29 colorectal carcinoma cells, and with IC50 values in the range of 2.1–5.7 uM.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
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The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Chem Biodivers. 2017 Aug 14
Constituents from Scutellaria barbata Inhibiting Nitric Oxide Production in LPS-stimulated Microglial Cells.[Pubmed:
28805952]
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), scutebatas B (3), scutebarbatine B (4), scutebarbatine A (6), 6-O-Nicotinoylscutebarbatine 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.
CONCLUSIONS:
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. This is the first report suggesting the potential of S. barbata on the reduction of neuroinflammation.
Natural Product Research, 2009, 11(5):451-6.
Two new neo-clerodane diterpenoid alkaloids from Scutellaria barbata with cytotoxic activities[Reference:
WebLink]
METHODS AND RESULTS:
Two new neo-clerodane diterpenoid alkaloids, scutebarbatine O (1) and 6-O-Nicotinoylscutebarbatine G (2), were isolated from the whole plant of Scutellaria barbata. Their structures were elucidated by spectroscopic methods including extensive 1D and 2D NMR analyses.
CONCLUSIONS:
In vitro, compounds 1 and 2 showed cytotoxic activities against three human tumor cell lines, namely, HONE-1 nasopharyngeal, KB oral epidermoid carcinoma, and HT29 colorectal carcinoma cells, and with IC50 values in the range of 2.1–5.7 μM.
