title: Oleanane triterpenoids from Akebiae Caulis exhibit inhibitory effects on Aβ42 induced fibrillogenesis.
abstract: Previous phytochemical investigations of Akebiae Caulis resulted in the isolation of triterpenes, triterpene glycosides, phenylethanoid glycosides and megastigmane glycoside. Amyloid beta (Aβ), the main component of the senile plaques detected in Alzheimer's disease, induces cell death. However, only a limited number of studies have addressed the biological and pharmacological effects of Akebiae Caulis. In particular, the inhibitory activity of Akebiae Caulis against Aβ42 fibrillogenesis remains unclear. Herein, a new triterpene glycoside, akequintoside F (1), along with nine known compounds pulsatilla saponin A (2), collinsonidin (3), akebonic acid (4), hederagenin (5), 1-(3',4'-dihydroxycinnamoyl) cyclopentane-2,3-diol (6), asperosaponin C (7), leontoside A (8), quinatic acid (9), and quinatoside A (10) were isolated from Akebiae Caulis using repeated column chromatography with silica gel, LiChroprep RP-18, and MCI gel. The chemical structures of compounds 1-10 were illustrated based on 1D and 2D NMR spectroscopy, including1H-1H COSY, HSQC, HMBC and NOESY spectroscopic analyses. Compound 1 a novel compound and known compounds 6 and 7 were isolated for the first time from this plant. Among these compounds, 1, 3, 4, 5 and 7 displayed significant inhibitory effects on Aβ42 induced fibrillogenesis. We present the first report of new compound 1 and the inhibitory effects of components from Akebiae Caulis on Aβ42 fibrillogenesis.
authors.affiliation: College of Pharmacy, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea.
authors.forename: Md Anisuzzaman
authors.initials: MA
authors.lastname: Chowdhury
authors.affiliation: College of Pharmacy, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea.
authors.forename: Hae Ju
authors.initials: HJ
authors.lastname: Ko
authors.affiliation: College of Pharmacy, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea.
authors.forename: Hwan
authors.initials: H
authors.lastname: Lee
authors.affiliation: Department of Cellular and Molecular Medicine, Chosun University, Gwangju, 61452, Republic of Korea.
authors.forename: Md
authors.initials: M
authors.lastname: Aminul Haque
authors.affiliation: Department of Cellular and Molecular Medicine, Chosun University, Gwangju, 61452, Republic of Korea.
authors.forename: Il-Seon
authors.initials: IS
authors.lastname: Park
authors.affiliation: College of Pharmacy, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea.
authors.forename: Dong-Sung
authors.initials: DS
authors.lastname: Lee
authors.affiliation: College of Pharmacy, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea. wooer@chosun.ac.kr.
authors.forename: Eun-Rhan
authors.initials: ER
authors.lastname: Woo
mesh_terms: D016229:Amyloid beta-Peptides / Q000037:antagonists & inhibitors*; D008958:Models, Molecular; D016874:Neurofibrillary Tangles / Q000473:pathology*; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000494:pharmacology; D010446:Peptide Fragments / Q000037:antagonists & inhibitors*; D018517:Plant Roots / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D058225:Plaque, Amyloid / Q000139:chemically induced / Q000517:prevention & control*; D013055:Spectrophotometry, Infrared; D014315:Triterpenes / Q000494:pharmacology*
chemical_list: D016229:Amyloid beta-Peptides; D010446:Peptide Fragments; D014315:Triterpenes; C075222:amyloid beta-protein (1-42); C413246:oleanane; D009828:Oleanolic Acid
keywords: Akebiae Caulis; Aβ42; Fibrillogenesis; Lardizabalaceae; Oleanane triterpenoid