3'-Hydroxypuerarin
3'-Hydroxypuerarin has antioxidant activity, it shows marked ONOO(-), NO·, total ROS scavenging activities, and weak ·O(2)(-) scavenging activity.
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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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Arch Pharm Res. 2012 May;35(5):823-37.
Anti-inflammatory and antioxidant activities of constituents isolated from Pueraria lobata roots.[Pubmed:
22644850]
METHODS AND RESULTS:
In order to evaluate the anti-inflammatory and antioxidant activities of Pueraria lobata roots and its active components, in vitro inhibitory activities against lipopolysaccharide (LPS)-induced nitric oxide (NO) production, inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2) protein expression, and tert-butylhydroperoxide (t-BHP)-induced reactive oxygen species (ROS) generation in RAW 264.7 cells, as well as in vitro scavenging activities against 1,1-diphenyl-2-picrylhydrazyl (DPPH), peroxynitrite (ONOO(-)), nitric oxide (NO·), superoxide anion (·O(2)(-)) and total ROS, and inhibitory activities against ONOO(-)-mediated tyrosine nitration, were determined. Repeated column chromatography was performed to isolate four known compounds from the anti-inflammatory and antioxidant EtOAc fraction: daidzein; genistein; puerarin; (+)-puerarol B-2-O-glucopyranoside; four known compounds from the anti-inflammatory n-hexane fraction: lupenone; lupeol; puerarol; coumestrol; seven known compounds from the antioxidant n-BuOH fraction: allantoin; 3'-Hydroxypuerarin; daidzein 8-C-apiosyl-(1→6)-glucoside; puerarin; genistin; 3'-methoxypuerarin; daidzin. Among these compounds, lupenone and lupeol reduced NO production, as well as iNOS and COX-2 protein levels in LPS-stimulated RAW 264.7 cells. Furthermore, lupeol showed significant inhibitory activity against intracellular ROS generation by t-BHP. Meanwhile, 3'-Hydroxypuerarin showed marked ONOO(-), NO·, total ROS scavenging activities, and weak ·O(2)(-) scavenging activity, while 3'-methoxypuerarin showed ONOO(-) scavenging activity and weak NO· and O(2)(-) scavenging activities, suggesting that existence of the 3'-hydroxyl group in puerarin plays an important role in the scavenging of ONOO(-), NO·, and total ROS, as well as inhibiting the ONOO(-)-mediated tyrosine nitration mechanism.
CONCLUSIONS:
These results indicate that P. lobata roots and its constituents may be a useful therapeutic and preventive approach to various inflammatory diseases and oxidative stress-related disease.
