Abstract Title:

Antitumor activity of compounds isolated from leaves of Eriobotrya japonica.

Abstract Source:

J Agric Food Chem. 2002 Apr 10;50(8):2400-3. PMID: 11929303

Abstract Author(s):

Hideyuki Ito, Eri Kobayashi, Shu-Hua Li, Tsutomu Hatano, Daigo Sugita, Naoki Kubo, Susumu Shimura, Yoshio Itoh, Harukuni Tokuda, Hoyoku Nishino, Takashi Yoshida

Article Affiliation:

Faculty of Pharmaceutical Sciences, Okayama University, Tsushima, Okayama 700-8530, Japan.


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.

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