Polygonum cuspidatum P.E.
Latin name: Polygonum cuspidatum
Chinese name: Hu Zhang
Family: Polygonaceae
Genus: Polygonum
Plant original: Polygonum cuspidatum Sieb.
Part used: Rhizome
Specification: Resveratrol 1%--98% Test By HPLC
| Analysis Items |
Specifications |
| Appearance |
Fine White Powder |
| Odor & Taste |
Characteristic |
| Loose Density |
NLT 20.0g/100ml |
| Tapped Density |
NLT 35g/100ml |
| Particle Size |
NLT 99% through 80 Mesh |
| Solubility |
Soluble in ethanol & water solution |
| |
|
|
| Assay |
NLT 98% Resveratrol |
| Extract Ratio |
150:1 |
| Loss on Drying |
NMT 0.5% |
| Sulphated Ash |
NMT 0.5% |
| Extract Solvents |
Ethanol/Water/Ethyl Acetate |
| Solvent Residues |
Meet the USP Requirements |
Traditional Andmodernuses: Huzhang ("tiger cane") or giant knotweed is an east Asian species (Polygonum cuspidatum), belonging to the Polygonaceae family. Pharmacology: In animal experiments, huzhang has exhibited antitussive, antihistaminic, hypotensive, vasodilating, cytotoxic, and antioxidant properties, among others. Huzhang is also a concentrated source of resveratrol (3,5,4÷-trihydroxy stilbene), an antioxidant produced in response to fungi. Resveratrol has also shown antimutagenic activity in bioassays conducted on bacteria in vitro (umu and Ames tests). And, in a recent investigation conducted in vivo and in vitro, resveratrol displayed chemopreventive effects at three critical stages of carcinogenesis. Specifically, resveratrol was found to 1) induce phase II drug metabolizing enzymes (antiinitiation); 2) mediate anti-inflammatory effects and inhibit cyclooxygenase and hydro-peroxidase (antipromotion); and 3) induce human promyelocytic leukemia cell diferentiation (antiprogression). Resveratrol was also found to inhibit the development of preneoplastic lesions in vitro and tumorigenesis in vivo. Very recently, it was reported that Huzhang extract is one of the best active-oxygen scavengers for the prevention of skin aging induced by UV-irradiation and free radical. Experiments conducted in vivo indicate that resveratrol is a potent vasodilator and inhibitor of platelet aggregation. Recent work in dogs and humans indicate that other concentrated sources of resveratrol (i.e., red wine and grape juice) eliminate cyclic blood-flow reductions caused by platelet-mediated thrombosis. Active Compounds: Huzhang is characterized by anthraquinones and their glycosides, napthoquinone, 3,5,4÷-trihydroxy stilbene (i.e., resveratrol), piceid, fallacinol, citreorosein, questin, questinol, protocatechuic acid, (+) catechin, 2,5-dimethyl-7- hydroxychromone, 7-hydroxy-4-methoxy-5-methylcoumarin, flavonols, polysaccharides, and condensed tannins. Regulatory Status: Under U.S. law, huzhang extract is regulated as a dietary supplement. As of this writing, no European governments had issued monographs or regulations for nutraceutical uses of huzhang. NOTE: The statements in this publication have not been evaluated by the FDA. Selected Reference: Encyclopedia of Chinese Drugs. Jiangsu Institute of Modern Medicine, Shanghai Scientific and Technical Publications, 1977. [Chinese] Encyclopedia of Common Natural Ingredients Used in Foods, Drugs, and Cosmetics, by Albert Leung, Ph.D. and Steven Foster. Hitoshi Masaki et al. Biol Pharm Bull. 18, 162-166, 1995. Huang WZ. Fujian Zhongyiyao, 18(4), 27, 1987. [Chinese] Kimura Y et al. Planta Med, 48, 164, 1996. Meishang Jang et al. Cancer chemopreventive activity of resveratrol, a natural product derived from grapes. Science, vol. 275, 218-220, 1997. Orsini, F. et al. Isolation, synthesis, and antiplatelet aggregation activity of resveratrol 3-O-b-D glucopyranoside and related compounds. J Nat Prod. 60:1082-87, 1997. Pharmacognosy, Phytochemistry, Medicinal Plants, by Prof. Jean Bruneton. Lavoisier Tec & Intercept Ltd., 1995. Records of Chinese Materia Medica Vol. 1. Institute of Materia Medica, Chinese Academy of Sciences,
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