|Source:||The roots of Piper methysticum|
|Biological Activity or Inhibitors:||1. Yangonin is a novel CB₁ receptor ligand, it exhibits affinity for the human recombinant CB₁ receptor.
2. Yangonin could be a valuable candidate for the intervention of NF-κB-dependent pathological conditions such as inflammation.
3. Yangonin , formononetin, and auraptene are effective inhibitors of EV-A71 infection in the low-micromolar.
4. Yangonin induces autophagy and sensitizes bladder cancer cells to flavokawain A and docetaxel via inhibition of the mTOR pathway.
|Solvent:||Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.|
|Storage:||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: email@example.com
|After receiving:||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.|
|1 mg||5 mg||10 mg||20 mg||25 mg|
|1 mM||3.8715 mL||19.3573 mL||38.7147 mL||77.4293 mL||96.7867 mL|
|5 mM||0.7743 mL||3.8715 mL||7.7429 mL||15.4859 mL||19.3573 mL|
|10 mM||0.3871 mL||1.9357 mL||3.8715 mL||7.7429 mL||9.6787 mL|
|50 mM||0.0774 mL||0.3871 mL||0.7743 mL||1.5486 mL||1.9357 mL|
|100 mM||0.0387 mL||0.1936 mL||0.3871 mL||0.7743 mL||0.9679 mL|
J Pharmacol Sci. 2012;118(4):447-54.
|Yangonin blocks tumor necrosis factor-α-induced nuclear factor-κB-dependent transcription by inhibiting the transactivation potential of the RelA/p65 subunit.[Pubmed: 22510965]|
|The nuclear factor-κB (NF-κB) transcription factors control many physiological processes including inflammation, immunity, and apoptosis. In our search for NF-κB inhibitors from natural resources, we identified Yangonin from Piper methysticum as an inhibitor of NF-κB activation. In the present study, we demonstrate that Yangonin potently inhibits NF-κB activation through suppression of the transcriptional activity of the RelA/p65 subunit of NF-κB. This compound significantly inhibited the induced expression of the NF-κB-reporter gene. However, this compound did not interfere with tumor necrosis factor-α (TNF-α)-induced inhibitor of κBα (IκBα) degradation, p65 nuclear translocation, and DNA-binding activity of NF-κB. Further analysis revealed that Yangonin inhibited not only the induced NF-κB activation by overexpression of RelA/p65, but also transactivation activity of RelA/p65. Moreover, Yangonin did not inhibit TNF-α-induced activation of p38, but it significantly impaired activation of extracellular signal-regulated kinase 1/2 and stress-activated protein kinase/c-Jun NH(2)-terminal kinase. We also demonstrated that pretreatment of cells with this compound prevented TNF-α-induced expression of NF-κB target genes, such as interleukin 6, interleukin 8, monocyte chemotactic protein 1, cyclooxygenase-2 and inducible nitric oxide. Taken together, Yangonin could be a valuable candidate for the intervention of NF-κB-dependent pathological conditions such as inflammation.|
Pharmacol Res. 2012 Aug;66(2):163-9.
|Kavalactones and the endocannabinoid system: the plant-derived yangonin is a novel CB₁ receptor ligand.[Pubmed: 22525682]|
|Among the molecules tested, only Yangonin exhibited affinity for the human recombinant CB₁ receptor with a K(i)=0.72 μM and selectivity vs. the CB₂ receptor (K(i)>10 μM). None of the compounds exhibited strong inhibitory effects on the two enzymes analyzed. The CB₁ receptor affinity of Yangonin suggests that the endocannabinoid system might contribute to the complex human psychopharmacology of the traditional kava drink and the anxiolytic preparations obtained from the kava plant.|
Antiviral Res. 2017 Jul;143:85-96.
|Characterization of three small molecule inhibitors of enterovirus 71 identified from screening of a library of natural products.[Pubmed: 28412182 ]|
|Enterovirus 71 (EV-A71) is a major cause of hand, foot, and mouth disease (HFMD). Infection with EV-A71 is more often associated with neurological complications in children and is responsible for the majority of fatalities, but currently there is no approved antiviral therapy for treatment. Here, we identified auraptene, formononetin, and Yangonin as effective inhibitors of EV-A71 infection in the low-micromolar range from screening of a natural product library. Among them, formononetin and Yangonin selectively inhibited EV-A71 while auraptene could inhibit viruses within the enterovirus species A. Time of addition studies showed that all the three inhibitors inhibit both attachment and postattachment step of entry. We found mutations conferring the resistance to these inhibitors in the VP1 and VP4 capsid proteins and confirmed the target residues using a reverse genetic approach. Interestingly, auraptene- and formononetin-resistant viruses exhibit cross-resistance to other inhibitors while Yangonin-resistant virus still remains susceptible to auraptene and formononetin.|
J Biomed Res. 2017 Jun 20.
|Kavalactone yangonin induces autophagy and sensitizes bladder cancer cells to flavokawain A and docetaxel via inhibition of the mTOR pathway.[Pubmed: 28630390]|
|Consumption of kava (Piper methysticum Forst) has been linked to reduced cancer risk in the South Pacific Islands. Kavalactones are major bioactive components in kava root extracts, which have recently demonstrated anti-cancer activities. However, molecular mechanisms of kavalactones' anti-cancer action remain largely unknown. We have identified two kavalactones, Yangonin and 5' 6'-dehydrokawain, as potent inducers of autophagic cell death in bladder cancer cells. The effect of Yangonin inducing autophagy is associated with increased expression of beclin and ATG5. In addition, Yangonin increases the expression of LKB1 and decreases the phosphorylation of Akt, PRAS40, rpS6, p70S6K and 4E-BP1, leading to increased binding of 4E-BP1 to m7 GTP. The growth inhibitory effects of Yangonin were attenuated in TSC1 or LKB1 knockout mouse embryonic fibroblasts, suggesting that TSC1 and LKB1 expression may contribute to optimal growth inhibition by Yangonin. Furthermore, Yangonin reduces the viability of bladder cancer cell lines derived from different stages of human bladder cancer, and acts synergistically with apoptosis-inducing agents such as docetaxel and flavokawain A. Our results support a novel anti-bladder cancer mechanism by Yangonin and further studies are needed to assess the potential use of Yangonin for bladder cancer prevention and treatment.|