Cancer Chemopreventive Activity of Xanthones from Calophyllum elatum

Author:

Ito Chihiro1,Matsui Takuya12,Kobayashi Takashi1,Tokuda Harukuni3,Shanmugam Sivabalan4,Itoigawa Masataka5

Affiliation:

1. Faculty of Pharmacy, Meijo University, Tempaku, Nagoya 468-8503, Japan

2. Department of Physiology, School of Medicine, Aichi Medical University, Nagakute, Aichi 480-1195, Japan

3. Organic Chemistry in Life Science, Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan

4. Faculty of Science, Annamalai University, Annamalai Nagar 608002, India

5. School of Sport and Health Science, Tokai Gakuen University, 21-233 Nishinohora, Ukigai, Miyoshi, Aichi 470-0207, Japan

Abstract

In our continuing search for compounds with antitumor-promoting activity, we screened eight xanthones isolated from Calophyllum elatum Bedd. (Guttiferae) by examining their possible inhibitory effects on Epstein-Barr virus early antigen (EBV-EA) activation induced by 12- O-tetradecanoylphorbol-13-acetate (TPA) in Raji cells. Several compounds tested in this study showed inhibitory activity against EBV, without showing any cytotoxicity. Isogarciniaxanthone E (2) showed more potent activity than any of the other compounds tested. Furthermore, isogarciniaxanthone E (2) exhibited a marked inhibitory effect on mouse skin tumor promotion in an in vivo two-stage carcinogenesis test.

Publisher

SAGE Publications

Subject

Complementary and alternative medicine,Plant Science,Drug Discovery,Pharmacology,General Medicine

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