Abstract
In a search for possible antitumor agents from natural sources, megastigmane glycosides and polyphenolic constituents isolated from the leaves of Eriobotrya japonica (Rosaceae) were found to inhibit the 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced activation of Epstein-Barr virus early antigen in Raji cells. Roseoside and procyanidin B-2 were among the active compounds found in an in vitro assay; these compounds were further assessed for antitumor activity in vivo in a two-stage carcinogenesis assay on mouse skin. Roseoside significantly delayed carcinogenesis induced by peroxynitrite (initiator) and TPA (promoter), and its potency was comparable to that of a green tea polyphenol, (-)-epigallocatechin 3-O-gallate, in the same assay.
Original language | English |
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Pages (from-to) | 2400-2403 |
Number of pages | 4 |
Journal | Journal of agricultural and food chemistry |
Volume | 50 |
Issue number | 8 |
DOIs | |
Publication status | Published - Apr 10 2002 |
Keywords
- (-)-epigallocatechin 3-O-gallate
- Antitumor activity
- Epstein-Barr virus activation
- Eriobotrya japonica
- Megastigmane glycosides
- Two-stage carcinogenesis
ASJC Scopus subject areas
- Chemistry(all)
- Agricultural and Biological Sciences(all)