3-Epicabraleahydroxylactone and Other Triterpenoids from Camellia Oil and Their Inhibitory Effects on Epstein-Barr Virus Activation
作者:Toshihiro Akihisa、Harukuni Tokuda、Motohiko Ukiya、Toshie Suzuki、Fumio Enjo、Kazuo Koike、Tamotsu Nikaido、Hoyoku Nishino
DOI:10.1248/cpb.52.153
日期:——
The structure of a triterpenoid isolated from the nonsaponifiable lipid (NSL) of the seed oil of the camellia (Camellia japonica L.; Theaceae) was established to be (20S)-3β-hydroxy-25,26,27-trisnordammaran-24,20-olide (1; 3-epicabraleahydroxylactone) on the basis of spectroscopic and chemical methods. Six other triterpenoids isolated from the NSL were identified as 3-epicabraleadiol (2), ocotillol II (3), ocotillol I (4), dammarenediol II (5), (20R)-taraxastane-3β,20-diol (6), and lupane-3β,20-diol (7). Upon evaluation of the seven triterpenoids (1—7) with respect to their inhibitory effects on the induction of Epstein–Barr virus early antigen (EBV-EA) by 12-O-tetradecanoylphorbol-13-acetate (TPA) in Raji cells, three compounds (5—7) showed potent inhibitory effects against EBV-EA induction (IC50 values of 277—420 mol ratio/32 pmol TPA).
通过光谱学和化学方法,从山茶花(Camellia japonica L.;山茶科)种子油的非皂化脂(NSL)中分离出的三萜类化合物结构被确定为(20S)-3β-羟基-25,26,27-三去甲藻烷-24,20-内酯(1;3-表卡巴苷内酯)。从NSL中分离出的其他六种三萜类化合物被确定为3-表卡巴苷内酯(2)、奥科蒂醇II(3)、奥科蒂醇I(4)、达玛内醇II(5)、(20R)-蒲公英烷-3β,20-二醇(6)和羽扇豆烷-3β,20-二醇(7)。在评估这七种三萜类化合物(1-7)对12-O-十四烷酰基-13-乙酰基-7-羟基-4-甲基-10-氧代-5-羟基-6,7,8,9,10,11,12,13-八氢-1H-茚并[1,2-b]呋喃-3-羧酸(TPA)