ChemFaces is a professional high-purity natural products manufacturer.
Product Intended Use
1. Reference standards
2. Pharmacological research
Citing Use of our Products
How to Order
Orders via your E-mail:
1. Product number / Name / CAS No.
2. Delivery address
3. Ordering/billing address
4. Contact information
Sent to Email: email@example.com
Order & Inquiry & Tech Support
Address: No. 83, CheCheng Rd., WETDZ, Wuhan, Hubei 430056, PRC
Delivery & Payment method
1. Usually delivery time: Next day delivery by 9:00 a.m. Order now
2. We accept: Wire transfer & Credit card & Paypal & Western Union
* Packaging according to customer requirements(5mg, 10mg, 20mg and more). We shipped via FedEx, DHL, UPS, EMS and others courier.
According to end customer requirements, ChemFaces provide solvent format. This solvent format of product intended use: Signaling Inhibitors, Biological activities or Pharmacological activities.
|Size /Price /Stock
||10 mM * 1 mL in DMSO / $251.2 / In-stock||Other Packaging
||*Packaging according to customer requirements(100uL/well, 200uL/well and more), and Container use Storage Tube With Screw Cap
More articles cited ChemFaces products.
Korean Journal of Pharmacognosy...2014...Int J Mol Sci.2015, 16(1):1232-51University of Limpopo2016, 1-237BMC Complement Altern Med.2016, 16:213Analytical sci. & Tech2016, 186-193Evid Based Complement Alternat Me...2016...Molecules.2016, 21(6)Kor. J. Pharmacogn.2016, 47(1):62-72
Pharm Biol.2016, 54(7):1255-62Acta Pharmaceutica Hungarica...2016...Mol Pharm.2017, 14(9):3164-3177Nutrients.2018, 10(12):E1998J of the Korean Society of Cosmet...2018...Korean Journal of Pharmacognosy...2018...Nat Commun.2019, 10(1):5169Toxins (Basel).2019, 11(10):E575
BMC Complement Altern Med....2019...Int J Mol Sci.2019, 20(3):E651Dent Mater J.2020, 39(4):690-695Front Pharmacol.2020, 11:251.Int J Mol Sci.2020, 21(6):2190. J of l. Chroma.&Related Tech...2020...American Association for Anatomy...2020...
Our products had been exported to the following research institutions and universities, And still growing.
Universidade da Beira Interior (Germany)China Medical University (Taiwan)Auburn University (USA)National Research Council of Ca... (Canada)
Griffith University (Australia)Guangzhou Institutes of Biomedi... (China)Sanford Burnham Medical Researc... (USA)Cornell University (USA)
Chiang Mai University (Thailand)Johannes Gutenberg University M... (Germany)Tokyo Woman's Christian University (Japan)
Inquire / Order:
1 Building, No. 83, CheCheng Rd., Wuhan Economic and Technological Development Zone, Wuhan, Hubei 430056, PRC
Chemistry of Vegetable Raw Materials2019, 3:119-127Nutrients.2019, 11(11):E2694Nat Prod Sci.2019, 25(3):238J Bone Miner Res.2017, 32(12):2415-2430Cell Physiol Biochem.2017, 43(4):1425-1435Cell Biochem Funct.2018, 36(6):303-311AMB Express2020. 10(1):126.Environ Toxicol.2019, 34(12):1354-1362Pharmacogn Mag.2015, 11(43):562-6Acta Agriculturae Scandinavica2015, 381-383
Related Screening Libraries
||Alpha-viniferin is a prostaglandin H2 synthase inhibitor, which has anti-inflammatory, anti-oxidant, anti-arthritis, and anti-tumor activities. Alpha-Viniferin inhibits AChE activity is specific, reversible and noncompetitive, in a dose-dependent manner, and the IC50 values of alpha-Viniferin were 2.0 microM. Alpha-Viniferin exhibits a dose-dependent inhibition on cyclooxygenase activity, where 50% of inhibition (IC50) was shown at a final concentration of about 7 microM, it down-regulates STAT-1-inducible inflammatory genes via inhibiting ERK-mediated STAT-1 activation in IFN-gamma-stimulated macrophages.|
||P450 (e.g. CYP17) | NO | PGE | NOS | COX | NF-kB | Akt | PI3K | HO-1 | Nrf2 | IFN-γ | STAT | ERK | AChR|
|J Pharmacol Sci. 2010;112(4):405-14. |
|alpha-Viniferin suppresses the signal transducer and activation of transcription-1 (STAT-1)-inducible inflammatory genes in interferon-gamma-stimulated macrophages.[Pubmed: 20424383]|
|alpha-Viniferin, an oligostilbene of trimeric resveratrol, has been reported to have anti-inflammatory potential in carrageenin-induced paw edema or adjuvant-induced arthritis in animal models. However, little is known about the molecular basis. |
METHODS AND RESULTS:
In this study, alpha-Viniferin at 3 - 10 microM dose-dependently inhibited interferon (IFN)-gamma-induced Ser(727) phosphorylation of the signal transducer and activation of transcription-1 (STAT-1), a pivotal transcription factor controlling IFN-gamma-targeted genes, in RAW 264.7 macrophages, and also IFN-gamma-induced activation of the extracellular signal-regulated kinase (ERK)-1, a protein kinase upstream of the Ser(727) phosphorylation of STAT-1. However, alpha-Viniferin, only at a higher concentration of 10 microM, inhibited Janus kinase 2-mediated Tyr(701) phosphorylation of STAT-1 in the cells. To understand STAT-1-dependent inflammatory responses, we quantified nitric oxide (NO) or chemokines. alpha-Viniferin at 3 - 10 muM dose-dependently inhibited IFN-gamma-induced production of NO, IFN-gamma-inducible protein-10 (IP-10), or the monokine induced by IFN-gamma (MIG) in RAW 264.7 cells and also that of NO in primary macrophages-derived from C57BL/6 mice. Furthermore, alpha-Viniferin diminished IFN-gamma-induced protein levels of inducible NO synthase (iNOS), attenuated mRNA levels of iNOS, IP-10, or MIG as well as inhibited promoter activity of the iNOS gene.
In conclusion, this study proposes an anti-inflammatory mechanism of alpha-Viniferin, down-regulating STAT-1-inducible inflammatory genes via inhibiting ERK-mediated STAT-1 activation in IFN-gamma-stimulated macrophages.
|Am J Chin Med. 2004;32(4):521-30. |
|The effects of alpha-viniferin on adjuvant-induced arthritis in rats.[Pubmed: 15481642]|
|This study was performed to assess the efficacy of alpha-Viniferin (Carex humilis Leyss) on adjuvant-induced arthritis in rats. Adjuvant arthritis was induced by a single subcutaneous injection of 0.1 ml complete Freund's adjuvant (CFA) containing 7.5 mg Mycobacterium butyricum suspended in 1 ml sterile paraffin oil into the right hind paw. |
METHODS AND RESULTS:
Forty female Sprague-Dawley rats were injected. Righting reflex was uniformly lost and considered to be the initial point of arthritis development on day 7 after CFA injection. Rats were divided into four groups, and upon development of arthritis, tested groups were orally administered 3 or 10 mg/kg alpha-Viniferin or 10 mg/kg ketoprofen every day for 14 days. The control group was orally administered 2 ml of physiological saline solution. Bone mineral density (BMD), radiological changes and edematous volumes were measured for 35 days. alpha-Viniferin suppressed the development of inflammatory edema, and inhibited the bone destruction, noted with a decrease in BMD (p < 0.05). Hind paw edema volume, BMD and radiological changes did not differ significantly in the ketoprofen and alpha-Viniferin groups during the entire study period.
In conclusion, alpha-Viniferin suppressed arthritic inflammation and bony change in rats.
||The herbs of Carex humilis Leyss.
||Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.
||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: firstname.lastname@example.org
||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.
ChemFaces New Products and Compounds
Recently, ChemFaces products have been cited in many studies from excellent and top scientific journals
Cell. 2018 Jan 11;172(1-2):249-261.e12. doi: 10.1016/j.cell.2017.12.019.IF=36.216(2019)PMID: 29328914
Cell Metab. 2020 Mar 3;31(3):534-548.e5. doi: 10.1016/j.cmet.2020.01.002.IF=22.415(2019)PMID: 32004475
Mol Cell. 2017 Nov 16;68(4):673-685.e6. doi: 10.1016/j.molcel.2017.10.022.IF=14.548(2019)PMID: 29149595
ACS Nano. 2018 Apr 24;12(4): 3385-3396. doi: 10.1021/acsnano.7b08969.IF=13.903(2019)PMID: 29553709
Nature Plants. 2016 Dec 22;3: 16206. doi: 10.1038/nplants.2016.205.IF=13.297(2019)PMID: 28005066
Sci Adv. 2018 Oct 24;4(10): eaat6994. doi: 10.1126/sciadv.aat6994.IF=12.804(2019)PMID: 30417089
Calculate Dilution Ratios(Only for Reference)
* Note: If you are in the process of experiment, it's need to make the dilution ratios of the samples. The dilution data of the sheet for your reference. Normally, it's can get a better solubility within lower of Concentrations.
|Food Chem Toxicol. 2014 Jul;69:276-80. |
|Potent inhibitory effect of alpha-viniferin on human cytochrome P450.[Pubmed: 24769006]|
|alpha-Viniferin isolated from Caragana chamlagu is a trimer of resveratrol, and has several biological activities, which include anti-inflammatory, anti-oxidant, anti-arthritis, and anti-tumor activities. Herb-drug interactions are the source of the most harmful complications in patients coadministered herbal and modern medicines, and are caused by modulation of the activities of drug metabolizing enzymes. |
METHODS AND RESULTS:
Here, the authors investigated the inhibitory effects of alpha-Viniferin on the activities of 9 human cytochrome P450 (CYP) isoforms using a cocktail of probe substrates and LC-MS/MS in pooled human liver microsomes (HLMs). alpha-Viniferin strongly inhibited 7 of the 9 CYP isoforms (except CYP2A6 and CYP2E1). Furthermore, alpha-Viniferin strongly inhibited CYP2C19-mediated omeprazole 5-hydroxylation and CYP3A4-catalyzed midazolam 1-hydroxylation with IC50 values of 0.93 and 1.2 μM, respectively. alpha-Viniferin strongly inhibited the activities of these two CYPs dose dependently, but not time-dependently. Lineweaver-Burk plots and secondary plots indicated a typical pattern of mix-mode inhibition for CYP2C19 and 3A4.
This is the first investigation conducted on the inhibitory effect of alpha-Viniferin on CYP2C19 and 3A4 in HLMs to predict a potential herb-drug interaction.
|Cell Immunol. 2014 Jul;290(1):21-9. |
|Anti-inflammatory mechanism of α-viniferin regulates lipopolysaccharide-induced release of proinflammatory mediators in BV2 microglial cells.[Pubmed: 24859013]|
|alpha-Viniferin is an oligostilbene of trimeric resveratrol and has anticancer activity; however, the molecular mechanism underlying the anti-inflammatory effects of alpha-Viniferin has not been completely elucidated thus far. Therefore, we determined the mechanism by which alpha-Viniferin regulates lipopolysaccharide (LPS)-induced expression of proinflammatory mediators in BV2 microglial cells. |
METHODS AND RESULTS:
Treatment with alpha-Viniferin isolated from Clematis mandshurica decreased LPS-induced production of nitric oxide (NO) and prostaglandin E2 (PGE2). alpha-Viniferin also downregulated the LPS-induced expression of proinflammatory genes such as iNOS and COX-2 by suppressing the activity of nuclear factor kappa B (NF-κB) via dephosphorylation of Akt/PI3K. Treatment with a specific NF-κB inhibitor, pyrrolidine dithiocarbamate (PDTC), indirectly showed that NF-κB is a crucial transcription factor for expression of these genes in the early stage of inflammation. Additionally, our results indicated that alpha-Viniferin suppresses NO and PGE2 production in the late stage of inflammation through induction of heme oxygenase-1 (HO-1) regulated by nuclear factor erythroid 2-related factor (Nrf2).
Taken together, our data indicate that alpha-Viniferin suppresses the expression of proinflammatory genes iNOS and COX-2 in the early stage of inflammation by inhibiting the Akt/PI3K-dependent NF-κB activation and inhibits the production of proinflammatory mediators NO and PGE2 in the late stage by stimulating Nrf2-mediated HO-1 signaling pathway in LPS-stimulated BV2 microglial cells. These results suggest that alpha-Viniferin may be a potential candidate to regulate LPS-induced inflammation.
|Planta Med. 1998 Apr;64(3):204-7. |
|Alpha-viniferin: a prostaglandin H2 synthase inhibitor from root of Carex humilis.[Pubmed: 9581514]|
|An inhibitor on cyclooxygenase activity of prostaglandin H2 synthase was purified from the root of Carex humilis Leyss (Cyperaceae) by a variety of column chromatographic methods. |
METHODS AND RESULTS:
As a result of the structure analysis by FAB-mass, 1H-NMR, and 13C-NMR spectral data, the active compound was identified as (+)-alpha-Viniferin, an oligomeric stilbene characterized originally from Caragana chamlagu Lamarck (Leguminosae). (+)-alpha-Viniferin exhibited a dose-dependent inhibition on cyclooxygenase activity, where 50% of inhibition (IC50) was shown at a final concentration of about 7 microM. Resveratrol, a putative building block of oligomeric stilbenes, also inhibited the cyclooxygenase activity.
The inhibitory potency of (+)-alpha-Viniferin was about 3- to 4-fold stronger than that of resveratrol on cyclooxygenase activity of prostaglandin H2 synthase partially purified from sheep seminal vesicles.