title: Cucurbitane glycosides from the fruits of Siraitia gros venorii and their inhibitory effects on Epstein-Barr virus activation.
abstract: Six new cucurbitane glycosides, mogroside II B (2), 11-deoxymogroside III (4), 7-oxomogroside II E (5), 7-oxomogroside V (6), 11-oxomogroside II A1 (7), and 11-oxomogroside IV A (8), and two known but new naturally occurring cucurbitane glycosides, mogroside II A1 (1) and mogroside III A2 (3), were isolated from an ethanol extract of the fruits of Siraitia grosvenorii. Upon evaluation of compounds 1-8 for inhibitory effects against the Epstein-Barr virus early antigen (EBV-EA) activation induced by 12-O-tetradecanoylphorbol-13-acetate (TPA), all compounds exhibited inhibitory effects with IC50 values of 346-400 mol ratio/32 pmol TPA. In addition, compounds 1-8 showed weak inhibitory effects on activation of (+/-)-(E)-methyl-2-[(E)-hydroxyimino]-5-nitro-6-methoxy-3-hexemide (NOR 1), a nitric oxide (NO) donor.
authors.affiliation: College of Science and Technology, Nihon University, 1-8 Kanda Surugadai, Chiyoda-ku, Tokyo 101-8308, Japan. akihisa@chem.cst.nihon-u.ac.jp
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Akihisa
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Hayakawa
authors.forename: Harukuni
authors.initials: H
authors.lastname: Tokuda
authors.forename: Norihiro
authors.initials: N
authors.lastname: Banno
authors.forename: Naoto
authors.initials: N
authors.lastname: Shimizu
authors.forename: Takashi
authors.initials: T
authors.lastname: Suzuki
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Kimura
mesh_terms: D000956:Antigens, Viral / Q000187:drug effects; D000998:Antiviral Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D019662:Cucurbitaceae / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D004854:Herpesvirus 4, Human / Q000502:physiology*; D015394:Molecular Structure; D020030:Nitric Oxide Donors / Q000494:pharmacology; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D014775:Virus Activation / Q000187:drug effects*
chemical_list: D000956:Antigens, Viral; D000998:Antiviral Agents; C033305:Epstein-Barr virus early antigen; D006027:Glycosides; D020030:Nitric Oxide Donors; D013755:Tetradecanoylphorbol Acetate