title: Antitumorigenic and antipromoting activities of ellagic acid, ellagitannins and oligomeric anthocyanin and procyanidin.
abstract: We previously showed that ellagic acid (EA) was inhibiting lung tumorigenesis induced by the tobacco-specific carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in A/J mice. In the present study, we observed that the inhibition of lung tumorigenesis was independent of the solvent used to purified EA. Pomegranate peels extract containing punicalagin (alpha and beta anomers) (10 g/kg diet) and oligomeric anthocyanins (6 g/kg diet) did not inhibit lung tumorigenesis. Raspberry extract (2x15 mg) containing sanguiin H6 and lambertianin D as well as oligomeric procyanidins (2x15 mg) inhibit 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced ornithine decarboxylase (ODC) activity by about 30%. The same treatments inhibit TPA-stimulated hydroperoxide (HPx) production by about 30 and 70%. Raspberry ellagitannins and oligomeric procyanidins respectively inhibit TPA stimulated DNA synthesis by 42 and 26%. Our results su est that hydrolyzable and condensed tannins from various sources, which can inhibit the ODC, HPx, and DNA responses to TPA, might also inhibit the tumor-promoting activity of this agent. The results of this study show that EA and ellagitannins have different antitumorigenic and antipromoting activities.
authors.affiliation: KANSAS STATE UNIV,DIV BIOL,ANTICANC DRUG LAB,MANHATTAN,KS 66506. OKAYAMA UNIV,FAC PHARMACEUT SCI,TSUSHIMA,OKAYAMA 700,JAPAN.
authors.forename: A
authors.initials: A
authors.lastname: Castonguay
authors.forename: H
authors.initials: H
authors.lastname: Gali
authors.forename: E
authors.initials: E
authors.lastname: Perchellet
authors.forename: X
authors.initials: X
authors.lastname: Gao
authors.forename: M
authors.initials: M
authors.lastname: Boukharta
authors.forename: G
authors.initials: G
authors.lastname: Jalbert
authors.forename: T
authors.initials: T
authors.lastname: Okuda
authors.forename: T
authors.initials: T
authors.lastname: Yoshida
authors.forename: T
authors.initials: T
authors.lastname: Hatano
authors.forename: J
authors.initials: J
authors.lastname: Perchellet