The inhibitory effects of mangiferin, a naturally occurring glucosylxanthone, in bowel carcinogenesis of male F344 rats.
Mangiferin, 1,3,6,7-tetrahydroxyxanthone-C2-beta-D-glucoside, is one of xanthone derivatives and C-glucosylxanthones, is widely distributed in higher plants and is one of constituents of folk medicines. Recent studies showed that mangiferin has a potential as an anti-oxidant and an anti-viral agent. In this study, we examined the effects of mangiferin in rat colon carcinogenesis induced by chemical carcinogen, azoxymethane (AOM). We performed two experiments: a short-term assay to investigate the effects of mangiferin on the development of preneoplastic lesions by AOM, aberrant crypt foci (ACF), and the following long-term assay for the influence of mangiferin on tumorigenesis induced by AOM. In the short-term assay, 0.1% mangiferin in a diet significantly inhibited the ACF development in rats treated with AOM compared to rats treated with AOM alone (64.6+/-22.0 vs. 108.3+/-43.0). In the long-term assay, the group treated with 0.1% mangiferin in initiation phase of the experimental protocol had significantly lower incidence and multiplicity of intestinal neoplasms induced by AOM (47.3 and 41.8% reductions of the group treated with AOM alone for incidence and multiplicity, respectively). In addition, the cell proliferation in colonic mucosa was reduced in rats treated with mangiferin (65-85% reductions of the group treated with AOM alone). These results suggest that mangiferin has potential as a naturally-occurring chemopreventive agent.
Yoshimi
N
N
Department of Pathology, Gifu University School of Medicine, 40 Tsukasa-machi, Gifu 500-8705, Japan. yoshimi@cc.gifu-u.ac.jp
Matsunaga
K
K
Katayama
M
M
Yamada
Y
Y
Kuno
T
T
Qiao
Z
Z
Hara
A
A
Yamahara
J
J
Mori
H
H
D000818:Animals; D016588:Anticarcinogenic Agents / Q000627:therapeutic use*; D001397:Azoxymethane; D002273:Carcinogens; D002455:Cell Division / Q000187:drug effects; D003110:Colonic Neoplasms / Q000139:chemically induced / Q000517:prevention & control*; D004354:Drug Screening Assays, Antitumor; D007413:Intestinal Mucosa / Q000187:drug effects / Q000473:pathology; D008297:Male; D011230:Precancerous Conditions / Q000139:chemically induced / Q000517:prevention & control*; D051381:Rats; D011916:Rats, Inbred F344; D014966:Xanthenes / Q000627:therapeutic use*; D044004:Xanthones
D016588:Anticarcinogenic Agents; D002273:Carcinogens; D014966:Xanthenes; D044004:Xanthones; C013592:mangiferin; D001397:Azoxymethane