4-O-Methylepisappanol
4-O-Methylepisappanol shows moderate neuroprotective effect at 40 microM.
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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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Biol Pharm Bull. 2009 May;32(5):945-9.
Cytoprotective constituents of the heartwood of Caesalpinia sappan on glutamate-induced oxidative damage in HT22 cells.[Pubmed:
19420770]
METHODS AND RESULTS:
The bioassay-guided fractionation of a MeOH extract of the heartwood of Caesalpinia sappan L. provided two neuroprotective compounds, sappanchalcone (2) and 4-O-Methylepisappanol (3), together with a methoxychalcone, isoliquiritigenin 2'-methyl ether (1), and three aromatic compounds, 4-O-methylsappanol (4), caesalpine J (5), pluchoic acid (6).
CONCLUSIONS:
At concentrations of 20-40 microM, compound 2 showed significant cytoprotective effects against glutamate-induced oxidative stress through the induction of heme oxygenase (HO)-1 in HT22-immortalized hippocampal cells. Compound 3 also showed moderate neuroprotective effect at 40 microM, but compounds 1, 4-6 did not show any protective effects against glutamate-induced cytotoxicity in HT22 cells.
