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Garlic (Allium sativum) and Fu-ling (Poria cocos) mitigate lead toxicity by improving antioxidant defense mechanisms and chelating ability in the liver of grass carp (Ctenopharyngodon idella)

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Abstract

The heavy metal lead (Pb) is a contaminant widely distributed in the food chain. In this study, eight weeks of feeding containing Garlic (Allium sativum) or Fu-ling (Poria cocos) or both, markedly increased the growth index, enzyme activity, and serum index and significantly decreased muscle Pb level in grass carp (Ctenopharyngodon idella). Upon Pb exposure, the feeding Garlic or Fu-ling or both possessed the similar effects on improving the function of the antioxidant system and chelating ability. Further, the gene expressions of metal binding proteins (TF and MT-2) in the liver of the three experimental groups were significantly higher than those of the control group, which were all highly up-regulated after Pb exposure. At the same time, the activities of antioxidant enzymes (SOD and CAT) and the content of non-enzymatic substance (GSH) in the liver of the Garlic group, Fu-ling group and mixed group were stable compared to the control group after Pb exposure. Moreover, the reduction of Pb toxicity was manifested by the decrease of Pb content in the muscle, and the stable expression of heat stress proteins (HSP30 and HSP60) and immune-related genes (TNF-α and IL-1β). Taken together, the study preliminarily shows that the Garlic and Fu-ling play a role in mitigating the toxicity of Pb in grass carp.

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Data and materials are available upon request.

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Acknowledgements

This project was supported by Guangzhou Science and Technology Program Key projects (201804020058), Natural Science Foundation of Guangdong Province, China (2020A1515111121), Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, South China Normal University (GDKLHSA1902).

Author contributions

Writing—review & editing, investigation, visualization: HL; investigation, writing—review & editing: SZ; investigation: Qiu Ming; writing—review & editing, resources: AW; writing—review & editing: JY; conceptualization, writing—review & editing, investigation, resources: SF.

Funding

This project was supported by Guangzhou Science and Technology Program Key projects (Grant numbers: 201804020058), Natural Science Foundation of Guangdong Province, China (Grant numbers: 2020A1515111121), Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, South China Normal University (Grant numbers: GDKLHSA1902).

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Correspondence to Shengli Fu.

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The authors declare no competing interests.

Ethical approval

This article does not contain any studies with human participants performed by any of the authors. All animal experimental procedures were carried out in accordance with the Regulations for Animal Experimentation of South China Normal University (SCNU-SLS-2020-001), and the animal facility was based on the National Institutes of Health guide for the care and use of Laboratory Animals (NIH Publications No. 8023).

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Informed consent was not required, as this research did not require human participants, their data or biological material. Additionally, all information is anonymized and the submission does not include images that may identify any people.

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Liu, H., Zhang, S., Qiu, M. et al. Garlic (Allium sativum) and Fu-ling (Poria cocos) mitigate lead toxicity by improving antioxidant defense mechanisms and chelating ability in the liver of grass carp (Ctenopharyngodon idella). Ecotoxicology 30, 885–898 (2021). https://doi.org/10.1007/s10646-021-02405-6

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  • DOI: https://doi.org/10.1007/s10646-021-02405-6

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