Intermedin B
Intermedin B is a natural product from Alpinia intermedia.
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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.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
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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Planta Med. 2017 Jan;83(1-02):151-157.
Intermedin A, a New Labdane Diterpene Isolated from Alpinia intermedia, Prolonged the Survival Time of P-388D1 Tumor-Bearing CDF1 Mice.[Pubmed:
27352383 ]
Eight ethanolic extracts of indigenous Taiwanese plants of the genus Alpinia were tested for tumor cytotoxicity against AGS, Hep G2, HeLa, KB, and HL-60 cells.
METHODS AND RESULTS:
Among the 50 % and 95 % EtOH extracts of eight Alpinia species, the cytotoxic effects of Alpinia intermedia leaves were the strongest. When the leaf extract of A. intermedia was partitioned using n-hexane and aqueous solvents, the n-hexane layer showed a greater cytotoxic effect and could prolong the survival time of P-388D1 tumor-bearing CDF1 mice. Two new labdane diterpene derivatives, intermedin A (1) and Intermedin B (2), and coronarin E (3) were isolated from the n-hexane layer of A. intermedia. Intermedin A induced apoptosis in HL-60 cells at 30 µg/mL and significantly prolonged the survival time of P-388D1 tumor-bearing CDF1 mice by 48.7 % at 20 mg/kg of body weight.
CONCLUSIONS:
We suggest that intermedin A is a major compound of A. intermedia and has a cytotoxic effect on HL-60 and P-388D1 cells.
