Showing papers on "Polygonum published in 1994"

Astragalus membranaceus and Polygonum multiflorum protect rat heart mitochondria against lipid peroxidation

Abstract: We isolated rat heart mitochondria and induced lipid peroxidation with ADP and FeSO4. Oxygen consumption and MDA formation were measured for quantitating the amount of lipid peroxidation. Using these methods, we screened the water extracts of 14 Chinese medicinal herbs for their effect on lipid peroxidation. It was found that Astragalus membranaceus inhibited 42.1 +/- 3.4% of oxygen consumption and 39.8 +/- 3.2% of MDA production at concentration of 2 mg dried herb/ml mitochondrial suspension. At the same concentration, Polygonum multiflorum inhibited 52.1 +/- 7.3% of oxygen consumption and 50.9 +/- 5.3% of MDA production. Other herbs did not inhibit lipid peroxidation to 50% of control at concentration up to 6 mg dried herb/ml mitochondrial suspension. Purification and identification of the active component(s) in Astragalus membranaceus and Polygonum multiflorum as well as their clinical application await further studies.

Novel Ca(2+)-ATPase inhibitors from the dried root tubers of Polygonum Multiflorum.

Abstract: The MeOH extract of the dried root tubers of Polygonum multiflorum yielded three bioactive compounds with an inhibitory activity on calmodulin-depleted erythrocyte calcium-dependent ATPase. These compounds were identified as E-2,3,5,4'-tetrahydroxystilbene 2-O-beta-D-glucopyranoside [2] (IC50 = 240 microM) and cis- and trans-E-3-butylidene-4,5,6,7-tetrahydro-6,7-dihydroxy-1(3H)- isobenzofuranone [3 and 4](IC50 = 160 and 260 microM, respectively). E-2,4,6,4'-Tetrahydroxystilbene 2-O-beta-D-glucopyranoside [1] was also isolated but was found to have no inhibitory effect on the enzyme.

COMPOSITION AND METHOD FOR TREATING HYPERGLYCEMIA UTILIZING AN EXTRACT OF $i(POLYGONUM MULTIFLORUM)

Abstract: A composition and method for treating hyperglycemia which utilize an extract of the Chinese herb Polygonum multiflorum. The herb is extracted with 0.1 N NH4OH and centrifuged. The supernatant is applied to a Sephadex G-25 column. Three fractions are collected. The fractions exhibit a high insulin potentiating activity in fat cell assays and are shown to lower blood glucose levels.

Occurrence of polygodial in plant organs and tissue culture of Polygonum hydropiper.

Abstract: Shoots of Polygonum hydropiper L. (waterpepper), especially in the leaves and flower-heads, contain significant amounts of the sesquiterpenoid polygodial, a compound with a potential use as a natural pesticide. The polygodial content of the tepals is particularly high: up to 8.5% of the dry weight. Roots and seeds do not contain detectable amounts of polygodial. Polygodial containing organs e.g. leaves and tepals, were found to contain cavities. Fourier transform infra-red (FTIR) microspectroscopy demonstrated that polygodial or its congeners are found in these cavities but not in other tissues or cells. Comparable cavities containing polygodial-like compounds were absent in the closely related species Polygonum persicaria L. Callus cultures and cell suspensions as well as root- and shoot cultures were initiated from mature P. hydropiper plants. Polygodial could be detected only in shoot cultures. Our results indicate that functioning plastids may be essential for polygodial production and cavities for its accumulation.

Chemical studies on the ethyl acetate insoluble fraction of the roots of Polygonum multiflorum Thunb

Abstract: Two new compounds were isolated from the ethyl acetate insoluble fraction of the roots of Polygonum multiflorum ThunbThe structures of polygonimitin B and C have been established as1,3- dihydroxy-6,7-dimethylxanthone-l-O-β -D-glucoside(Ⅰ) and 2,3,5,4’- tetrahydroxystilbene-2,3-O-β-D glucoside(Ⅱ), respectively,by spectroscopic methods(UV,IR,FAB- MS,1HNMR,1 3CNM R,1H-13C COSY and NOE different spectrum)

Nomenclatural notes on Persicaria

Abstract: The following names are lectotypified: Polygonum amphibium, P. foliosum, P. hydropiper, P. lapathifolium ssp. leptocladum, P. pallidum and P. persicaria, Polygonum persicaria var. incana is neotypified. Polygonum ruderale is a superfluous nomenclatural synonym of P. persicaria. The following new combinations are made: Persicaria lapathifolia ssp. pallida, P. lapathifolia var. incana and P. lapathifolia var. linicola. The nomenclature of H. B. Danser's early works is discussed. Flora Nordica Notes no. 8.

Hair growth promoter of polygonum

Abstract: PURPOSE:To extract a composition contained in a leaf, a stem or a seed of a polygonaceous plant and use the extracted component as a hair growth and hair tonic promoter. CONSTITUTION:A hair growth agent or a hair tonic utilizing stimulating properties of a polygonaceous plant is prepared by extracting a component from a leaf, a stem, a root or a seed of Polygonum hydropiper L., which is a polygonaceous plant and mixing the resultant extract with a pantothenic acid- based, a vitamin E-based, a vitamin B-based ingredients, sesame oil, etc., to be a nourishing element for the hair and using the resultant extract as the objective hair growth promoter.

Volatile constituents of the essential oils of two Polygonum species from Vietnam

Abstract: Polygonum species grown in many places in Vietnam, esp. on the rice-field. It is used in the traditional medicine. After Pham Hoang Ho until now in Vietnam, 40 Polygonum species have been found. From the polygonum genus (Family Polygonaceae) the essential oils of 2 species are reported: Polygonum hydropiper (L.) and Polygonum sp. Using HRGC and GC/MS more than 30 components from Polygonum hydropiper (L.) were sepd. Among these 2 main compds. with MW = 216 (28.40%, 29.00%) and MW = 218 (27.63%, 27.78%) resp. were found in the stem and leaf oils. Other compds. with relative low concn. in the stem and leaf oils are a-humulene (7.06%, 7.14%), compd. with MW = 218 (4.62%, 4.51%), sesquiterpene alc. with MW = 220 (4.86%, 4.89%) and curcumene (2.5%). The main constituents in the essential oil of Polygonum sp. are a-humulene (16.75%), b-elemene (14.32%), and (Z)-b-farnesene (11.16%)