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Mitigation of avermectin exposure-induced brain tissue damage in carp by quercetin

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Abstract  

Avermectin is widely used as an important insecticide in agricultural production, but it also shows strong toxicity to non-target organisms. Quercetin is a natural flavonoid that is widely used due to its good anti-inflammatory and antioxidant effects. We believe that quercetin may have a potential therapeutic effect on avermectin poisoning. This experiment was proposed to observe the effect of quercetin on the toxic response to avermectin by observing the toxic response caused by avermectin in the brain of carp. In this project, 60 carp were studied as control group (Control), quercetin administration group (QUE), avermectin exposure group (AVM) and quercetin treatment avermectin exposure group (QUE + AVM) with different interventions to study the effect of quercetin on avermectin. The carp brain tissues were stained and simultaneously analyzed for blood–brain barrier (BBB), oxidative stress indicators, inflammatory factors, and apoptosis using qPCR technique. The results of the study indicate that avermectin exhibits a neurotoxic mechanism of action in fish by decreasing the transcript levels of tight junction protein-related genes, which in turn leads to the rupture of the BBB in the carp brain tissue. Avermectin induced apoptosis in carp brain tissue by increasing oxidative stress response and promoting inflammatory cell infiltration. Quercetin could reduce the accumulation of reactive oxygen species (ROS) in the brain tissue of carp caused by avermectin exposure toxicity, maintain redox homeostasis, reduce inflammatory response, and protect brain tissue cells from apoptosis. The present study confirmed the therapeutic and protective effects of quercetin on neurotoxicity in carp caused by avermectin exposure.

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Data availability

All data generated or analyzed during this study are available from the corresponding author on reasonable request.

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Funding

This work was supported by the National Natural Science Foundation of China (No. 81773968) and the Priority Academic Program Development of Jiangsu Higher Education Institutions of China.

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Contributions

Xuhui Xu: investigation, methodology, writing—original draft. Mengyuan Zhou: investigation, methodology, writing—original draft. Kunmei Xie: investigation, methodology, writing—original draft. Shuai Zhang: methodology, data curation, investigation. Xiaomeng Ji: methodology, data curation, investigation. Yin Sun: methodology, data curation, investigation. Qiulu Li: methodology, data curation, investigation.Zibo Dong: conceptualization, funding acquisition, project administration, supervision. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Zibo Dong.

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Ethical approval

In this experiment, all animal tests were conducted in accordance with the Principles of Laboratory Animal Care published by the NIH No. 85–23 (amended 1985) and the National Institute of Environmental Health Standards of Practice NIPRD/0.5.03.05–1. Both of these standards have been approved by the Laboratory Animal Ethics Committee of Ocean University of Jiangsu, approval number: 2021226082.

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The authors declare no competing interests.

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Xu, X., Zhou, M., Xie, K. et al. Mitigation of avermectin exposure-induced brain tissue damage in carp by quercetin. Fish Physiol Biochem 49, 1171–1185 (2023). https://doi.org/10.1007/s10695-023-01249-7

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  • DOI: https://doi.org/10.1007/s10695-023-01249-7

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