Procyanidin B1
Procyanidin B1, a HCV RNA polymerase inhibitor, inhibits infection by vesicular stomatitis virus and HCV pseudotype virus in Huh-7 cells, with IC50 of 29μM and 15μM, respectively. Procyanidin B1 has neuroprotective effects, may attenuate the activation of caspase-3 by inhibiting that of caspase-8 and -9. It has anti-inflammatory effect on LPS-treated THP1 cells via interaction with the TLR4–MD-2 heterodimer and p38 MAPK and NF-κB signaling.
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Recommended storage conditions and precautions regarding proper product handling are contained in the product Certificate of Analysis (COA). Here are general storage guidelines for compounds:
Powder: -20°C 3 years and 4°C 2 years
In solvent: -80°C 6 months and -20°C 1 month
If the solution is stored at -20°C for more than one month, it should be re-examined to ensure its efficacy. Avoid repeated freeze and thaw cycles.
Storage conditions for some special products should refer to their COAs.
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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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