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Cloning of a river pufferfish (Takifugu obscurus) metallothionein cDNA and study of its induction profile in cadmium-exposed fish

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Title
Cloning of a river pufferfish (Takifugu obscurus) metallothionein cDNA and study of its induction profile in cadmium-exposed fish
Other Titles
Puffer fish의 metallothionein (MT) cDNA의 클로닝과 cadmium에 노출된 어류에서 MT 유전자의 유도에 관한 연구
Authors
Soon-Young Wang
Jae-Seong Lee
Jin-Hyoung Kim
Kyung-Nam Han
Kim, Il-Chan
Sheikh Raisuddin
Jang-Seu Ki
Subject
Environmental Sciences & Ecology
Keywords
Biomarker; Cadmium; Detoxification; Metallothionein; Takifugu obscurus
Issue Date
2008
Publisher
Pergamon-Elsevier Science
Citation
Soon-Young Wang, et al. 2008. "Cloning of a river pufferfish (Takifugu obscurus) metallothionein cDNA and study of its induction profile in cadmium-exposed fish". CHEMOSPHERE, 71: 1251-1259.
Abstract
We report here the full-length cDNA sequence of metallothionein (MT) gene from an anadromous river pufferfish, Takifugu obscurus (order: Tetradotiformes;family: Tetradontidae). Phylogenetic relationship analysis revealed that the identified MT has high sequence similarity with many Perciformes fish species. The tissue distribution and concentration- and time-dependent expression of MT mRNA were studied in fish exposed to cadmium. Liver showed the highest level of MT gene expression followed by other tissues (brain, gill and kidney) in response to cadmium exposure. Muscle showed a weak expression response of MT gene. Time-course study revealed highest early phase (at 6 h) expression in the brain and late persistence of induction in the intestine. MT mRNA expression showed a concentration- dependent expression in all the tissues. However, induction in brain and liver occurred at much lower concentrations as compared to other tissues. Our results demonstrate that MT in T. obscurus is induced by cadmium exposure which indicates that it plays a functionally conserved function of metal detoxification.
URI
http://repository.kopri.re.kr/handle/201206/6238
DOI
http://dx.doi.org/10.1016/j.chemosphere.2007.11.067
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