Vitexin -4''-O-glucoside
Vitexin-4''-O-glucoside could effectively protect ECV-304 cells against cytotoxicity induced by TBHP through resuming mitochondrial function.
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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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Nat Prod Res. 2010 Nov;24(18):1695-703.
The mechanism of vitexin-4''-O-glucoside protecting ECV-304 cells against tertbutyl hydroperoxide induced injury. [Pubmed:
20419557]
The aim of this article is to investigate the mechanism of Vitexin -4''-O-glucoside (VOG) protecting ECV-304 cells against tertbutyl hydroperoxide (TBHP)-induced injury.
METHODS AND RESULTS:
ECV-304 cell viability was measured by MTT assay. Apoptosis was determined by terminal deoxynucleotidyl transferase-mediated dUTP nick end-labelling (TUNEL) assay. Cellular morphological changes were observed using phase contrast microscopy. The change of relative mitochondrial transmembrane potential in the ECV-304 cells was analysed with rhodamine 123 staining. Lipid peroxidation was measured by the HPLC method. The results showed that 128 µmol L(-1) VOG could effectively protect ECV-304 cells against cytotoxicity induced by TBHP. VOG protected TBHP-treated ECV-304 cells from death, significantly decreased MDA production, and increased superoxide dismutase (SOD) activity and mitochondrial membrane potential (ΔΨ).
CONCLUSIONS:
Taken together, VOG protects against TBHP-induced ECV-304 cell injury partially through resuming mitochondrial function.
J Chromatogr B Analyt Technol Biomed Life Sci. 2010 Jul 1;878(21):1837-44.
Simultaneous determination of vitexin-4''-O-glucoside, vitexin-2''-O-rhamnoside, rutin and vitexin from hawthorn leaves flavonoids in rat plasma by UPLC-ESI-MS/MS.[Pubmed:
20570577]
A sensitive and accurate ultra-performance liquid chromatography electrospray ionization tandem mass spectrometry (UPLC-ESI-MS/MS) method was developed and validated for the simultaneous determination of Vitexin -4''-O-glucoside (VGL), vitexin-2''-O-rhamnoside (VRH), rutin (RUT) and vitexin (VIT) in rat plasma after intravenous administration of hawthorn leaves flavonoids (HLF).
METHODS AND RESULTS:
Following protein precipitation by methanol, the analytes were separated on an ACQUITY UPLC BEH C(18) column packed with 1.7 microm particles by gradient elution using a mobile phase composed of acetonitrile and water (containing 0.1% formic acid) at a flow rate of 0.20 mL/min. The analytes and diphenhydramine (internal standard, IS) were detected in the multiple reaction monitoring (MRM) mode by means of an electrospray ionization (ESI) interface (m/z 292.96 for Vitexin -4''-O-glucoside , m/z 293.10 for vitexin-2''-O-rhamnoside, m/z 299.92 for rutin, m/z 310.94 for vitexin and m/z 166.96 for IS). The calibration curve was linear over the range 10-40,000 ng/mL for vitexin-4''-O-glucoside, 10-50,000 ng/mL for vitexin-2''-O-rhamnoside, 8-1000 ng/mL for rutin and 16-2000 ng/mL for vitexin. The intra- and inter-run precisions (relative standard deviation, RSD) of these analytes were all within 15% and the accuracy (the relative error, RE) ranged from -10% to 10%.
CONCLUSIONS:
The stability experiment indicated that the four analytes in rat plasma samples and plasma extracts under anticipated conditions were stable. The developed method was applied for the first time to pharmacokinetic studies of the four bioactive compounds of hawthorn leaves flavonoids following a single intravenous administration of 20 mg/kg in rats.
