JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Cancer chemopreventive activity of diversin from Ferula diversivittata in vitro and in vivo.

Phytomedicine 2010 March
A prenylated coumarin (diversin, 1) together with four new sesquiterpene lactones (diversolides A, D, F and G, 2-5) isolated from the roots of Ferula diversivittata were studied for their possible inhibitory effects on Epstein-Barr virus early antigen (EBV-EA) activation induced by 12-O-tetradecanoylphorbol-13-acetate (TPA). All of the tested compounds were active against EBV-EA activation. Among these compounds diversin (IC(50): 7.7) exhibited the strongest inhibitory effect and was selected to examine its effects on in vivo two-stage mouse skin carcinogenesis induced by 7,12-dimethylbenz[a]anthracene (DMBA) as initiator and TPA as promoter. Treatment with compound 1 (85nmol) along with DMBA/TPA inhibited papilloma formation up to week 7 and the percentage of papilloma bearers was approximately 93.3% at week 20. The average number of papillomas formed per mouse was only 5.5 even at week 20. The results of the present investigation indicated that diversin might be valuable as a potent cancer chemopreventive agent and its potency was comparable with those of curcumin and quercetin, two well-known cancer chemopreventive agents.

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