|Source:||The rhizomes of Cistanche tubulosa (Schenk) Wight|
|Biological Activity or Inhibitors:||1. Tubuloside A ( 8.6 microM) can inhibit D-galactosamine-induced death of hepatocytes.
2. Tubuloside A has NO radical-scavenging activity, which possibly contributes to its anti-inflammatory effects.
3. Tubuloside A shows stronger free radical scavenging activities than alpha-tocopherol on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical and xanthine/xanthine oxidase (XOD) generated superoxide anion radical (O2-.).
|Solvent:||Pyridine, Methanol, Ethanol, 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: firstname.lastname@example.org
|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||1.2066 mL||6.0331 mL||12.0662 mL||24.1324 mL||30.1655 mL|
|5 mM||0.2413 mL||1.2066 mL||2.4132 mL||4.8265 mL||6.0331 mL|
|10 mM||0.1207 mL||0.6033 mL||1.2066 mL||2.4132 mL||3.0166 mL|
|50 mM||0.0241 mL||0.1207 mL||0.2413 mL||0.4826 mL||0.6033 mL|
|100 mM||0.0121 mL||0.0603 mL||0.1207 mL||0.2413 mL||0.3017 mL|
Plant Biotechnology 12(1), 46-54, 1995-04-01
|Studies on the Tissue Culture of Cistanche Plants: I. Callus Induction and Shoot Differentiation from the Seed of Cistanche tubulosa Wight[Reference: WebLink]|
|Cistanche tubulosa Wight. is an important herbal medicine including such phenylethanoide glycosides as echinacoside (E), Tubuloside A (TA), acteoside (A) and 2′-acetylacteoside (2′AA), and is a holoparasitic plant distributed in a wide range from the North African to Chinese in and and semi arid regions.|
Biol Pharm Bull. 1996 Dec;19(12):1580-5.
|Antioxidative effects of phenylethanoids from Cistanche deserticola.[Pubmed: 8996643]|
|The acetone-H2O (9:1) extract from the stem of Cistanche deserticola showed a strong free radical scavenging activity. Nine major phenylethanoid compounds were isolated from this extract. They were identified by NMR as acteoside, isoacteoside, 2'-acetylacteoside, tubuloside B, echinacoside, Tubuloside A, syringalide A 3'-alpha-rhamnopyranoside, cistanoside A and cistanoside F. All of these compounds showed stronger free radical scavenging activities than alpha-tocopherol on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical and xanthine/xanthine oxidase (XOD) generated superoxide anion radical (O2-.). Among the nine compounds, isoacteoside and tubuloside B, whose caffeoyl moiety is at 6'-position of the glucose, showed an inhibitory effect on XOD. We further studied the effects of these phenylethanoids on the lipid peroxidation in rat liver microsomes induced by enzymatic and non-enzymatic methods. As expected, each of them exhibited significant inhibition on both ascorbic acid/Fe2+ and ADP/NADPH/Fe3+ induced lipid peroxidation in rat liver microsomes, which were more potent than alpha-tocopherol of caffeic acid. The antioxidative effect was found to be potentiated by an increase in the number of phenolic hydroxyl groups in the molecule.|
Eur J Pharmacol. 2000 Jul 14;400(1):137-44.
|Inhibition of nitric oxide by phenylethanoids in activated macrophages.[Pubmed: 10913595]|
|Nitric oxide (NO) is one of the pro-inflammatory molecules. Some phenylethanoids have been previously shown to possess anti-inflammatory effects. Seven phenylethanoids from the stems of Cistanche deserticola, viz. isoacteoside, tubuloside B, acteoside, 2'-O-acetylacteoside, echinacoside, cistanoside A and Tubuloside A, were tested for their effect on NO radical generation by activated murine macrophages. At the concentration of 100-200 microM, all the phenylethanoids reduced (6.3-62.3%) nitrite accumulation in lipopolysaccharide (0.1 microgram/ml)-stimulated J774.1 cells. At 200 microM, they inhibited by 32.2-72.4% nitrite accumulation induced by lipopolysaccharide (0.1 microgram/ml)/interferon-gamma (100 U/ml) in mouse peritoneal exudate macrophages. However, these compounds did not affect the expression of inducible nitric oxide (iNOS) mRNA, the iNOS protein level, or the iNOS activity in lipopolysaccharide-stimulated J774.1 cells. Instead, they showed a clear scavenging effect (6.9-43.9%) at the low concentrations of 2-10 microM of about 12 microM nitrite generated from an NO donor, 1-propanamine-3-hydroxy-2-nitroso-1-propylhydrazino (PAPA NONOate). These results indicate that the phenylethanoids have NO radical-scavenging activity, which possibly contributes to their anti-inflammatory effects.|
Bioorg Med Chem. 2010 Mar 1;18(5):1882-90.
|Acylated phenylethanoid oligoglycosides with hepatoprotective activity from the desert plant Cistanche tubulosa.[Pubmed: 20159656 ]|
|The methanolic extract from fresh stems of Cistanche tubulosa (Orobanchaceae) was found to show hepatoprotective effects against D-galactosamine (D-GalN)/lipopolysaccharide (LPS)-induced liver injury in mice. From the extract, three new phenylethanoid oligoglycosides, kankanosides H(1) (1), H(2) (2), and I (3), were isolated together with 16 phenylethanoid glycosides (4-19) and two acylated oligosugars (20, 21). The structures of 1-3 were determined on the basis of spectroscopic properties as well as of chemical evidence. Among the isolates, echinacoside (4, IC(50)=10.2 microM), acteoside (5, 4.6 microM), isoacteoside (6, 5.3 microM), 2'-acetylacteoside (8, 4.8 microM), and Tubuloside A (10, 8.6 microM) inhibited D-GalN-induced death of hepatocytes. These five isolates, 4 (31.1 microM), 5 (17.8 microM), 6 (22.7 microM), 8 (25.7 microM), and 10 (23.2 microM), and cistantubuloside B(1) (11, 21.4 microM) also reduced TNF-alpha-induced cytotoxicity in L929 cells. Moreover, principal constituents (4-6) exhibited in vivo hepatoprotective effects at doses of 25-100mg/kg, po.|