Genetic Evidence of an Evolutionarily Conserved Role for Nrf2 in the Protection against Oxidative Stress
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- Katsuki Mukaigasa
- Department of Molecular and Developmental Biology, Faculty of Medicine, University of Tsukuba, Tennodai, Tsukuba, Japan
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- Linh T. P. Nguyen
- Department of Molecular and Developmental Biology, Faculty of Medicine, University of Tsukuba, Tennodai, Tsukuba, Japan
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- Li Li
- Department of Molecular and Developmental Biology, Faculty of Medicine, University of Tsukuba, Tennodai, Tsukuba, Japan
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- Hitomi Nakajima
- Department of Molecular and Developmental Biology, Faculty of Medicine, University of Tsukuba, Tennodai, Tsukuba, Japan
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- Masayuki Yamamoto
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Japan
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- Makoto Kobayashi
- Department of Molecular and Developmental Biology, Faculty of Medicine, University of Tsukuba, Tennodai, Tsukuba, Japan
書誌事項
- 公開日
- 2012-11-01
- 資源種別
- journal article
- 権利情報
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- https://journals.asm.org/non-commercial-tdm-license
- DOI
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- 10.1128/mcb.00481-12
- 公開者
- Informa UK Limited
説明
Transcription factor Nrf2 is considered a master regulator of antioxidant defense in mammals. However, it is unclear whether this concept is applicable to nonmammalian vertebrates, because no animal model other than Nrf2 knockout mice has been generated to examine the effects of Nrf2 deficiency. Here, we characterized a recessive loss-of-function mutant of Nrf2 (nrf2(fh318)) in a lower vertebrate, the zebrafish (Danio rerio). In keeping with the findings in the mouse model, nrf2(fh318) mutants exhibited reduced induction of the Nrf2 target genes in response to oxidative stress and electrophiles but were viable and fertile, and their embryos developed normally. The nrf2(fh318) larvae displayed enhanced sensitivity to oxidative stress and electrophiles, especially peroxides, and pretreatment with an Nrf2-activating compound, sulforaphane, decreased peroxide-induced lethality in the wild type but not nrf2(fh318) mutants, indicating that resistance to oxidative stress is highly dependent on Nrf2 functions. These results reveal an evolutionarily conserved role of vertebrate Nrf2 in protection against oxidative stress. Interestingly, there were no significant differences between wild-type and nrf2(fh318) larvae with regard to their sensitivity to superoxide and singlet oxygen generators, suggesting that the importance of Nrf2 in oxidative stress protection varies based on the type of reactive oxygen species (ROS).
収録刊行物
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- Molecular and Cellular Biology
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Molecular and Cellular Biology 32 (21), 4455-4461, 2012-11-01
Informa UK Limited