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Chen YN, Bian WP, Liu L, Chen X, Tang M, Pei DS. Generation of a novel transgenic marine medaka (Oryzias melastigma) for highly sensitive detection of heavy metals in the environment. JOURNAL OF HAZARDOUS MATERIALS 2021; 419:126382. [PMID: 34218191 DOI: 10.1016/j.jhazmat.2021.126382] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/27/2021] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
As typic priority pollutants in the marine environment, heavy metals can be accumulated in the human body leading to serious environmental and health problems. The metal regulatory elements (MREs) have been identified to be the main functional parts for the response to heavy metals. To develop a convenient biological monitoring tool for the detection of heavy metals in the oceans, we generated a transgenic marine medaka line Tg(OmMT: eGFP) with a truncated metallothionein promoter, which was only 193 bp and drove the expression of eGFP. After Tg(OmMT:eGFP) embryos were treated with four different heavy metals and different concentrations, the results showed that the expression level of eGFP was consistent with that of the endogenous mt. The transgenic embryos are very sensitive to Hg2+, and the fluorescence could be induced in the 0.0002 μM concentration, which is far lower than the primary water standard. The expression level of eGFP and mt showed a dose-dependent manner to heavy metals concentration. Taken together, the newly established marine medaka is a sensitive, efficient, and convenient tool for monitoring heavy metal pollution in the environment, especially seawater.
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Affiliation(s)
- Ya-Nan Chen
- College of Ecology and Environment, Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228, China; Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Wan-Ping Bian
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Li Liu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Xin Chen
- College of Ecology and Environment, Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228, China
| | - Min Tang
- College of Ecology and Environment, Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228, China.
| | - De-Sheng Pei
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China.
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Qiu X, Takamura T, Enoki S, Kato-Unoki Y, Takai Y, Nagano Y, Kinoshita M, Kitano T, Shimasaki Y, Oshima Y. Detoxification roles of tributyltin-binding protein type 2 in Japanese medaka (Oryzias latipes) exposed to tributyltin. MARINE POLLUTION BULLETIN 2020; 159:111445. [PMID: 32758797 DOI: 10.1016/j.marpolbul.2020.111445] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 06/27/2020] [Accepted: 07/05/2020] [Indexed: 06/11/2023]
Abstract
Tributyltin-binding protein type 2 (TBT-bp2), a homolog of α1-acid glycoprotein, may contribute to both accumulation and detoxification of TBT in fish. In this study, we conducted acute TBT exposure tests using both wide-type (WT) and TBT-bp2-/- (KO) strains of medaka and compared their responses in survival time and accumulation of TBT. Deficiency of TBT-bp2 significantly accelerated the time to death of medaka and decreased the LC50 of TBT, indicating that the KO-strain is more sensitive to TBT. No significant difference in the intrinsic TBT concentration in surviving fish was observed between the two strains. However, the intrinsic TBT concentration in dead KO-strain was significantly lower than that in WT-strain. These findings provide direct evidence, supporting the hypothesis that TBT-bp2 plays a critical role in the detoxification of TBT in fish.
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Affiliation(s)
- Xuchun Qiu
- Institute of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang, Jiangsu 212013, PR China; Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Takumi Takamura
- Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan; Chemicals Evaluation and Research Institute, 3-2-7, Miyanojin, Kurume-shi, Fukuoka 839-0801, Japan
| | - Shintaro Enoki
- Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Yoko Kato-Unoki
- Center for Advanced Instrumental and Educational Supports, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Yuki Takai
- Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Yosuke Nagano
- Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Masato Kinoshita
- Department of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Takeshi Kitano
- Department of Biological Sciences, Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan
| | - Yohei Shimasaki
- Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Yuji Oshima
- Laboratory of Marine Environmental Science, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan; Institute of Nature and Environmental Technology, Kanazawa University, Kakuma-machi 920-1192, Japan.
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