Daphnenone shows cytotoxic activity against the tumor cells of human melanoma A375-S2 , with the IC(50) value of 29.8 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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Two new compounds with cytotoxic activity on the human melanoma A375-S2 cells from Daphne giraldii callus cells.[Pubmed: 23106433
METHODS AND RESULTS:
Four compounds were isolated from Daphne giraldii callus cells, and their structures were characterized as Daphnenone (1), daphnolon (2), R-( - )-1-(4'-hydroxyphenyl)-3-hydroxy-5-phenyl-1,5-pentandione (3), and S-(+)-daphneolone-4'-O-β-d-glucoside (4) on the basis of MS, NMR spectrographic analysis, and chemical methods.
All of the four compounds possessed C6-C5-C6 carbon skeleton, and among them, 3 and 4 were two new compounds.
In activity screening test, compounds 1, 2, 3, and 4 showed different degrees of cytotoxic activity against the tumor cells of human melanoma A375-S2 by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium hydrobromide method, with IC(50) values of 29.8, 51.0, 41.0, and 150.0 μM, respectively. Furthermore, we found the important target which could explain the cytotoxic mechanism of the four compounds by using autodock 4.0, a structure-guided discovery approach, and the important residues CYS532, GLY534, and SER535 of B-Raf kinase have been discovered.
Nat Prod Res. 2006 Dec;20(14):1290-4.
Two new chemical constituents from Daphne odora Thunb. var. marginata.[Pubmed: 17393653
METHODS AND RESULTS:
Two new phenolic constituents, Daphnenone (1) and daphneone (2), were isolated from the stem bark of Daphne odora Thunb. var. marginata. Their structures were established on the basis of spectroscopic analysis. Compounds 1 and 2 were tested for cytotoxic activity by MTT assays on five human tumour cell lines, K562, A549, MCF-7, LOVO and HepG2.
Compound 1 showed obvious cytotoxic activity against all the five cell lines.