Xanthones as inhibitors of Epstein-Barr virus activation.
To search for possible antitumor promoters, we carried out a primary screening of 20 xanthones isolated from plants of the Guttiferae family, using their possible inhibitory effects on Epstein-Barr virus early antigen (EBV-EA) activation induced by 12-O-tetradecanoylphorbol-13-acetate (TPA) in Raji cells. Some of these xanthones, namely 1,3,7-trihydroxy-2-(3-methyl-2-butenyl)xanthone (8), dulxanthone-B (10) and latisxanthone-C (15), were observed to significantly inhibit the EBV-EA activation. The investigation indicated that 8, 10 and 15 might be valuable antitumor promoters.
Ito
C
C
Faculty of Pharmacy, Meijo University, Nagoya, Japan.
Itoigawa
M
M
Furukawa
H
H
Rao
K S
KS
Enjo
F
F
Bu
P
P
Takayasu
J
J
Tokuda
H
H
Nishino
H
H
D000956:Antigens, Viral / Q000096:biosynthesis / Q000187:drug effects; D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology; D002273:Carcinogens / Q000494:pharmacology; D002470:Cell Survival / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004854:Herpesvirus 4, Human / Q000187:drug effects* / Q000254:growth & development; D006801:Humans; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D013329:Structure-Activity Relationship; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D014407:Tumor Cells, Cultured / Q000166:cytology / Q000187:drug effects / Q000821:virology; D014775:Virus Activation / Q000187:drug effects*; D014966:Xanthenes / Q000737:chemistry / Q000494:pharmacology*; D044004:Xanthones
D000956:Antigens, Viral; D000970:Antineoplastic Agents; D002273:Carcinogens; D010936:Plant Extracts; D014966:Xanthenes; D044004:Xanthones; C009689:xanthone; D013755:Tetradecanoylphorbol Acetate