title: Cognition-enhancing and neuroprotective effects of hederacolchiside-E from Pulsatilla koreana.
abstract: The root extract of Pulsatilla koreana (Ranunculaceae) has been found to have prominent abilities to reverse scopolamine-induced cognitive impairment in rats, and to increase the viability of human neuroblastoma SK-N-SH cells incubated with amyloid-beta peptide (1 - 42) [A beta (1 - 42)]. In vivo and in vitro activity-guided fractionation studies using solvent-partitioning and subsequent chromatographic separations led to the isolation of hederacolchiside-E, an oleanolic glycoside, as an active ingredient. Administration of hederacolchiside-E (30 and 60 mg/kg body weight, P. O.) increased the step-through latency time in the passive avoidance test as efficiently as tacrine (30 mg/kg, P. O.). The neuroprotective effect of hederacolchiside-E on SK-N-SH cells against the toxicity of A beta (1 - 42) was comparable to that of catechin. These data suggest that hederacolchiside-E might be a good therapeutic candidate for the treatment of Alzheimer's disease.
authors.affiliation: Life Science R&D Center, SK Chemicals, Changan-gu, Suwon-si, Gyeonggi-do, Korea.
authors.forename: Chang-Kyun
authors.initials: CK
authors.lastname: Han
authors.forename: Won Rack
authors.initials: WR
authors.lastname: Choi
authors.forename: Ki-Bong
authors.initials: KB
authors.lastname: Oh
mesh_terms: D000284:Administration, Oral; D000544:Alzheimer Disease / Q000517:prevention & control; D016229:Amyloid beta-Peptides / Q000633:toxicity; D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects*; D045744:Cell Line, Tumor / Q000187:drug effects; D003071:Cognition / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D018696:Neuroprotective Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D018517:Plant Roots; D031946:Pulsatilla; D051381:Rats; D012503:Saponins / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D016229:Amyloid beta-Peptides; D018696:Neuroprotective Agents; D010936:Plant Extracts; D012503:Saponins; C523728:hederacolchiside E