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Protective effect of Uncaria tomentosa extract against oxidative stress and genotoxicity induced by glyphosate-Roundup® using zebrafish (Danio rerio) as a model

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Abstract

Oxidative stress and DNA damage are involved in the glyphosate-based herbicide toxicity. Uncaria tomentosa (UT; Rubiaceae) is a plant species from South America containing bioactive compounds with known beneficial properties. The objective of this work was to evaluate the antioxidant and antigenotoxic potential of UT extract in a model of acute exposure to glyphosate-Roundup® (GR) in zebrafish (Danio rerio). We showed that UT (1.0 mg/mL) prevented the decrease of brain total thiols, the increase of lipid peroxidation in both brain and liver, and the decrease of liver GPx activity caused after 96 h of GR (5.0 mg/L) exposure. In addition, UT partially protected against the increase of micronucleus frequency induced by GR exposure in fish brain. Overall, our results indicate that UT protects against damage induced by a glyphosate-based herbicide by providing antioxidant and antigenotoxic effects, which may be related to the phenolic compounds identified in the extract.

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Acknowledgments

The authors thank FAPESC/SC (01/2014, 004/2012), CNPq, and Unochapecó for the financial support and scholarships. We thank M.L. Athayde for the contribution in phytochemical analysis.

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Correspondence to Leila Zanatta.

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Responsible editor: Philippe Garrigues

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Santo, G.D., Grotto, A., Boligon, A.A. et al. Protective effect of Uncaria tomentosa extract against oxidative stress and genotoxicity induced by glyphosate-Roundup® using zebrafish (Danio rerio) as a model. Environ Sci Pollut Res 25, 11703–11715 (2018). https://doi.org/10.1007/s11356-018-1350-6

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  • DOI: https://doi.org/10.1007/s11356-018-1350-6

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