title: Xanthine oxidase inhibitory activity of extracts prepared from Polygonaceae species.
abstract: The xanthine oxidase (XO) inhibitory activity of aqueous and organic extracts of 27 selected species belonging in five genera (Fallopia, Oxyria, Persicaria, Polygonum and Rumex) of the family Polygonaceae occurring in the Carpathian Basin were tested in vitro. From different plant parts (aerial parts, leaves, flowers, fruits and roots), a total of 196 extracts were prepared by subsequent extraction with methanol and hot H2O and solvent-solvent partition of the MeOH extract yielding n-hexane, chloroform and 50% MeOH subextracts. It was found that the chloroform subextracts and/or the remaining 50% MeOH extracts of Fallopia species (F. bohemica, F. japonica and F. sachalinensis), Rumex species (R. acetosa, R. acetosella, R. alpinus, R. conglomeratus, R. crispus, R. hydrolapathus, R. pulcher, R. stenophyllus, R. thyrsiflorus, R. obtusifolius subsp. subalpinus, R. patientia) and Polygonum bistorta, Polygonum hydropiper, Polygonum lapathifolium and Polygonum viviparum demonstrated the highest XO inhibitory activity (>85% inhibition) at 400 µg/mL. The IC50 values of the active extracts were also determined. On the basis of the results, these plants, and especially P. hydropiper and R. acetosella, are considered worthy of activity-guided phytochemical investigations.
authors.affiliation: Department of Pharmacognosy, University of Szeged, Eötvös u. 6, H-6720, Szeged, Hungary.
authors.forename: Orsolya
authors.initials: O
authors.lastname: Orbán-Gyapai
authors.forename: Ildikó
authors.initials: I
authors.lastname: Lajter
authors.forename: Judit
authors.initials: J
authors.lastname: Hohmann
authors.forename: Gusztáv
authors.initials: G
authors.lastname: Jakab
authors.forename: Andrea
authors.initials: A
authors.lastname: Vasas
mesh_terms: D004791:Enzyme Inhibitors / Q000494:pharmacology*; D020128:Inhibitory Concentration 50; D010936:Plant Extracts / Q000494:pharmacology*; D019664:Polygonaceae / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D014969:Xanthine Oxidase / Q000037:antagonists & inhibitors*
chemical_list: D004791:Enzyme Inhibitors; D010936:Plant Extracts; D012997:Solvents; D014969:Xanthine Oxidase
keywords: Fallopia; Persicaria species; Polygonaceae; Polygonum; Rumex; xanthine oxidase inhibitory activity