Genome‐wide analysis of <scp>DNA</scp> methylation changes induced by gestational arsenic exposure in liver tumors
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- Takehiro Suzuki
- Center for Environmental Health Sciences National Institute for Environmental Studies Tsukuba Japan
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- Satoshi Yamashita
- Division of Epigenomics National Cancer Center Research Institute Tokyo Japan
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- Toshikazu Ushijima
- Division of Epigenomics National Cancer Center Research Institute Tokyo Japan
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- Shota Takumi
- Center for Environmental Health Sciences National Institute for Environmental Studies Tsukuba Japan
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- Tomoharu Sano
- Center for Environmental Measurement and Analysis National Institute for Environmental Studies Tsukuba Japan
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- Takehiro Michikawa
- Center for Environmental Health Sciences National Institute for Environmental Studies Tsukuba Japan
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- Keiko Nohara
- Center for Environmental Health Sciences National Institute for Environmental Studies Tsukuba Japan
書誌事項
- 公開日
- 2013-11-08
- 資源種別
- journal article
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1111/cas.12298
- 公開者
- Wiley
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説明
<jats:p>Inorganic arsenic is known to be a human carcinogen. Previous studies have reported that DNA methylation changes are involved in arsenic‐induced carcinogenesis, therefore, DNA methylation changes that are specific to arsenic‐induced tumors would be useful to distinguish tumors induced by arsenic from tumors caused by other factors and to dissect arsenic carcinogenesis. Previous studies have shown that gestational arsenic exposure of C3H mice, which tend to spontaneously develop liver tumors, increases the incidence of tumors in male offspring. In this study we used the same experimental protocol as in those previous studies and searched for DNA regions where methylation status was specifically altered in the liver tumors of arsenic‐exposed offspring by using methylated DNA immunoprecipitation–CpG island microarrays. The methylation levels of the DNA regions selected were measured by quantitative methylation‐specific PCR and bisulfite sequencing. The results of this study clarified a number of regions where DNA methylation status was altered in the liver tumors in the C3H mice compared to normal liver tissues. Among such regions, we showed that a gene body region of the oncogene <jats:italic>Fosb</jats:italic> underwent alteration in DNA methylation by gestational arsenic exposure. We also showed that <jats:italic>Fosb</jats:italic> expression significantly increased corresponding to the DNA methylation level of the gene body in the arsenic‐exposed group. These findings suggest that the DNA methylation status can be used to identify tumors increased by gestational arsenic exposure.</jats:p>
収録刊行物
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- Cancer Science
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Cancer Science 104 (12), 1575-1585, 2013-11-08
Wiley
