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| Effects of microplastics on accumulation and growth physiology of bisphenol A in the intestines of carps |
| Received:March 31, 2023 |
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| KeyWord:microplastics;bisphenol A;intestinal tissue;antioxidant enzyme activity;biomarker response |
| Author Name | Affiliation | E-mail | | HOU Chenli | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China
Collaborative Innovation Center of Autonomous Region for Ecological Protection and Comprehensive Utilization in the Inner Mongolia Section of the Yellow River Basin, Baotou 014010, China | | | YU Shengqian | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China
Collaborative Innovation Center of Autonomous Region for Ecological Protection and Comprehensive Utilization in the Inner Mongolia Section of the Yellow River Basin, Baotou 014010, China | | | YU Yue | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China
Collaborative Innovation Center of Autonomous Region for Ecological Protection and Comprehensive Utilization in the Inner Mongolia Section of the Yellow River Basin, Baotou 014010, China | | | YU Linghong | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China
Collaborative Innovation Center of Autonomous Region for Ecological Protection and Comprehensive Utilization in the Inner Mongolia Section of the Yellow River Basin, Baotou 014010, China | | | FAN Cairui | School of Geography and Planning, Jining Normal University, Ulanqab 012000, China | | | LI Weiping | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China
Collaborative Innovation Center of Autonomous Region for Ecological Protection and Comprehensive Utilization in the Inner Mongolia Section of the Yellow River Basin, Baotou 014010, China | sjlwp@163.com |
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| Abstract: |
| To investigate the impact of microplastics（MPs）on the accumulation features and growth physiology of bisphenol A（BPA）in fish intestines, this study used yellow river carp as a model organism to analyze the accumulation characteristics, growth, and antioxidant enzyme activity of MPs and BPA in carp intestines under the combined action of 0.5 μm polystyrene microplastics（PS-MPs）and BPA, as well as the response relationship between them. The results show that the concentration of PS-MPs in carp intestines under the combined treatment increased linearly with time and with the concentration of added microplastics, while the rate of PS-MPs accumulation first increased and then decreased with time. Under the BPA+PS（L）（1 mg·L-1 BPA+20 μg·L-1 PS-MPs）treatment, the PS-MPs accumulation rate reached its peak（373.81 μg·g-1·d-1）at 0.25 d, and under the treatment of BPA+PS（H）（1 mg·L-1 BPA+100 μg·L-1 PS-MPs）, the accumulation rate reached its highest（644.00 μg·g-1·d-1）at 0.125 d. Compared with single BPA exposure, the BPA accumulation in carp intestines increased under the combined exposure. Compared with the treatment with only BPA（1 mg·L-1 BPA）, the BPA concentrations in carp intestines increased by 6.13% and 9.74% under BPA+PS（L）and BPA+PS（H）treatments, respectively, and the BPA accumulation rates increased by 190.01% and 373.80%, respectively. Both BPA treatment and the combined action of MPs and BPA increased the activities of superoxide dismutase, catalase, reduced glutathione, and malondialdehyde content in carp intestinal tissues and slowed the decrease in body weight. Under the BPA, BPA+PS（L）, and BPA+PS（H）treatments, carp body weight decreased by 1.22%, 3.90%, and 4.33%, respectively, compared with the control treatment. When the amount of microplastics added reached 100 μg·mL-1, the combined treatment increased the activity of superoxide dismutase, the content of catalase and glutathione in carp intestines, and inhibited the production of malondialdehyde, thereby alleviating the oxidative damage caused by the combined action of MPs and BPA and slowing down the decrease in carp body weight. The results showed that the presence of microplastics increased the accumulation of BPA in carp intestines, and the combined toxic effect of MPs and BPA led to a slowdown in carp growth rate and a decrease in body weight. |
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