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Qiu X, Saovany S, Takai Y, Akasaka A, Inoue Y, Yakata N, Liu Y, Waseda M, Shimasaki Y, Oshima Y. Quantifying the vector effects of polyethylene microplastics on the accumulation of anthracene to Japanese medaka (Oryzias latipes). Aquat Toxicol 2020; 228:105643. [PMID: 33017738 DOI: 10.1016/j.aquatox.2020.105643] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 08/31/2020] [Accepted: 09/16/2020] [Indexed: 06/11/2023]
Abstract
To better assess the risk of microplastics (MPs) as a vector for contaminants, it is essential to understand the relative importance of MPs compared to other pathways for chemical transfer as well as the consequences of co-exposure. In this study, we exposed Japanese medaka (Oryzias latipes) to anthracene (ANT, 0.1 mg/L) in the presence or absence of pristine polyethylene MPs (PE-MPs, 106 beads/L), to quantify the vector effect of PE-MPs on ANT accumulation. Under the ANT-MPs co-exposure conditions, PE-MPs rapidly accumulated in the gastrointestinal tract of the medaka during a 14-day uptake phase, with an average bioconcentration factor of 171.4 L/kg. The PE-MPs could absorb and accumulate approximately 70 % of the ANT from the water sample. The PE-MPs changed the pharmacokinetic profile of ANT in medaka by decreasing both the uptake and depuration rate constants. The one compartment with first-order elimination model estimated that the amounts of ANT in the water phase and absorbed by PE-MPs (i.e., a vector effect) contributed about 67 % and 33 % of the ANT accumulation in medaka, respectively. At the end of the uptake (exposure) phase, however, the presence of PE-MPs did not significantly alter the final ANT concentrations in the fish body or alter the behavioral impacts of ANT. Thus, PE-MPs ingestion may act as a vector to concentrate and transfer ANT to medaka, but the presence of these particles may have limited adverse effects on fish under co-exposure systems of the type used in this study.
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Affiliation(s)
- Xuchun Qiu
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, PR China; Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395, Japan
| | - Souvannasing Saovany
- Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395, Japan
| | - Yuki Takai
- Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395, Japan
| | - Aimi Akasaka
- Chemicals Evaluation and Research Institute, Japan, 3-2-7, Miyanojin, Kurume-shi, Fukuoka 839-0801, Japan
| | - Yoshiyuki Inoue
- Chemicals Evaluation and Research Institute, Japan, 3-2-7, Miyanojin, Kurume-shi, Fukuoka 839-0801, Japan
| | - Naoaki Yakata
- Chemicals Evaluation and Research Institute, Japan, 3-2-7, Miyanojin, Kurume-shi, Fukuoka 839-0801, Japan
| | - Yangqing Liu
- Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395, Japan
| | - Mami Waseda
- Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395, Japan
| | - Yohei Shimasaki
- Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395, Japan
| | - Yuji Oshima
- Laboratory of Marine Environmental Science, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395, Japan; Institute of Nature and Environmental Technology, Kanazawa University, Kanazawa, 920-1192, Japan.
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