title: In vitro immunomodulatory activity of flavonoid glycosides from Urtica dioica L.
abstract: The major compounds isolated from the methanolic extract of the aerial parts of Urtica dioica L. were determined as quercetin-3-O-rutinoside (1). kaempherol-3-O-rutinoside (2). and isorhamnetin-3-O-glucoside (3). by chromatographic, chemical (acidic hydrolysis) and spectral (UV, IR, (1)H-NMR, (13)C-NMR) methods. Their immunomodulatory activities were studied in vitro by chemotaxis (Boyden Migration Chamber) and intracellular killing activity (NBT reduction) tests. Compounds 1, 2, 3 and the total flavonoid fraction were determined to have significant chemotactic effects in 4, 8, 16 microg doses. According to the results of the NBT reduction test, all flavonoid glycosides showed high intracellular killing activity. The results of both assays confirmed the immunostimulatory activity of the flavonoid fraction and the isolated flavonoid glycosides on neutrophils suggesting that they could possibly be useful for treating patients suffering from neutrophil function deficiency and chronic granulomatous diseases.
authors.affiliation: Hacettepe University, Faculty of Pharmacy, Department of Pharmacognosy, 06100 Sinhiye, Ankara, Turkey.
authors.forename: Pinar
authors.initials: P
authors.lastname: Akbay
authors.forename: A Ahmet
authors.initials: AA
authors.lastname: Basaran
authors.forename: Ulkü
authors.initials: U
authors.lastname: Undeger
authors.forename: Nursen
authors.initials: N
authors.lastname: Basaran
mesh_terms: D000276:Adjuvants, Immunologic / Q000737:chemistry / Q000494:pharmacology*; D002633:Chemotaxis / Q000187:drug effects; D005419:Flavonoids / Q000494:pharmacology; D006027:Glycosides / Q000494:pharmacology; D006801:Humans; D009504:Neutrophils / Q000187:drug effects*; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D018547:Plant Stems; D026982:Urtica dioica
chemical_list: D000276:Adjuvants, Immunologic; D005419:Flavonoids; D006027:Glycosides; D010936:Plant Extracts