title: Neuroprotective effects of constituents of Eragrostis ferruginea against Aβ-induced toxicity in PC12 cells.
abstract: A new flavonoid, 7-demethylageconyflavone A (1), and five known compounds, tricin (2), ageconyflavone A (3), corylin (4), nectandrin B (5), and 4-ketopinoresinol (6) were isolated from the aerial parts of Eragrostis ferruginea. Their structures were determined using spectroscopic techniques, including 1D- and 2D-NMR. All compounds were tested for the neuroprotective effects against amyloid beta peptide (Abeta) using PC12 cells, a major cause of the pathology of Alzheimer's disease. Tricin (2) was found to have a neuroprotective effect with an ED(50) value of 20.3 microM against Abeta-induced toxicity in PC12 cells. Ageconyflavone A (3), nectandrin B (5) and 4-ketopinoresinol (6) demonstrated moderate neuroprotective effects with ED(50) values of 58.7, 44.1, and 54.8 microM, respectively.
authors.affiliation: Korea University, Seoul, Korea.
authors.forename: Chae Sun
authors.initials: CS
authors.lastname: Na
authors.forename: Seong Su
authors.initials: SS
authors.lastname: Hong
authors.forename: Yun-Hyeok
authors.initials: YH
authors.lastname: Choi
authors.forename: Yong Ho
authors.initials: YH
authors.lastname: Lee
authors.forename: Sun Hee
authors.initials: SH
authors.lastname: Hong
authors.forename: Ji-Youn
authors.initials: JY
authors.lastname: Lim
authors.forename: Byeong Hoa
authors.initials: BH
authors.lastname: Kang
authors.forename: So-Young
authors.initials: SY
authors.lastname: Park
authors.forename: Dongho
authors.initials: D
authors.lastname: Lee
mesh_terms: D016229:Amyloid beta-Peptides / Q000037:antagonists & inhibitors* / Q000633:toxicity*; D000818:Animals; D031750:Eragrostis; D018696:Neuroprotective Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D016716:PC12 Cells; D010446:Peptide Fragments / Q000037:antagonists & inhibitors* / Q000633:toxicity*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D051381:Rats
chemical_list: D016229:Amyloid beta-Peptides; D018696:Neuroprotective Agents; D010446:Peptide Fragments; D010936:Plant Extracts; C074636:amyloid beta-protein (25-35)