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福島県立医科大学学術成果リポジトリ = Fukushima Medical University Repository >
福島医学会 = The Fukushima Society of Medical Science >
Fukushima Journal of Medical Science >
Vol.56 (2010) >
このアイテムの引用には次の識別子を使用してください:
http://ir.fmu.ac.jp/dspace/handle/123456789/257
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| タイトル: | No inhibitory effects of (-)-epigallocatechin gallate and lycopene on spontaneous hepatotumorigenesis in C3H/HeN mice |
| その他のタイトル: | Effects of EGCG and lycopene on liver tumor |
| 著者: | Takahashi, Yoshihisa
Hara, Yukihiko
Imanaka, Masayo
Wanibuchi, Hideki
Tanaka, Kiyoji
Ishikawa, Takatoshi
Mori, Shigeo
Fukusato, Toshio |
| 誌名/書名: | Fukushima Journal of Medical Science |
| 巻: | 56 |
| 号: | 1 |
| 開始ページ: | 17 |
| 終了ページ: | 27 |
| 発行日: | 2010年6月 |
| 抄録: | Although several studies have indicated that (-)-epigallocatechin gallate (EGCG) and lycopene, representative dietary antioxidants, inhibit chemically induced animal tumorigenesis, only a few studies have examined the inhibitory effects of these compounds on spontaneous liver tumorigenesis in rodents. In this study, we investigated the inhibitory effects of these compounds on the formation of spontaneous liver tumors in C3H/HeN mice. We used xeroderma pigmentosum group A (XPA) gene-deficient mice to simultaneously examine whether the knockout mice could be used as a sensitive animal model. Inaddition, we examined the levels of 8-hydroxy-2'-deoxyguanosine (8-OHdG)--a marker of reactive oxygen species-induced DNA injury--in liver tissue. Male XPA +/+, XPA +/-, and XPA -/- mice with a C3H/HeN genetic background were divided into 3 groups: control, EGCG, and lycopene. Autopsy at 18 months of age revealed that EGCG and lycopene did not exhibit obvious suppressive effects on the development of liver tumors in any XPA genotype; further, the XPA genotype did not influence any susceptibility to liver tumors. With regard to 8-OHdG levels in non-tumorous liver tissue at 8 months of age, EGCG showed no significant inhibitory effects and lycopene showed significant inhibitory effects only in XPA +/- mice. The present study demonstrates that contrary to previous reports of the inhibitory effects of EGCG and lycopene on the development of various carcinogen-induced animal tumors, these compounds exert no chemopreventive effects on spontaneous liver tumorigenesis in C3H/HeN mice. EGCG and lycopene may inhibit carcinogen-induced tumors through properties other than their antioxidant abilities. |
| 出版者: | The Fukushima Society of Medical Science |
| 出版者（異表記）: | 福島医学会 |
| 本文の言語: | eng |
| このページのURI: | http://ir.fmu.ac.jp/dspace/handle/123456789/257 |
| 本文URL: | http://ir.fmu.ac.jp/dspace/bitstream/123456789/257/1/FksmJMedSci_56_p17.pdf |
| ISSN: | 0016-2590
2185-4610 |
| DOI: | 10.5387/fms.56.17 |
| PubMed番号: | 21485652 |
| 異版(出版者版等): | http://dx.doi.org/10.5387/fms.56.17 |
| 権利情報: | © 2010 The Fukushima Society of Medical Science |
| 出現コレクション: | Vol.56 (2010)
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