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Atrazine exposure in gestation and breastfeeding affects Calomys laucha sperm cells

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Abstract

The present study evaluated the effects of low doses of atrazine administered during gestation and breastfeeding on sperm characteristics of the wild rodent Calomys laucha. Adult females were divided into groups of 10 and administered different doses of atrazine through gavage, during gestational or breastfeeding period. At 3 months of age, the F1 adult male progeny of these females was evaluated. We observed a drastic reduction in the total and progressive motility of male sperm cells at all doses and during both the exposure periods. Moreover, the plasma membrane integrity of adult male sperm cells decreased at all doses of atrazine administered during the breastfeeding, whereas the membrane fluidity of these cells increased at all tested doses. Atrazine led to a decrease in the sperm mitochondrial functionality at all doses and during both exposure periods. The damage to the sperm DNA was higher in males exposed to the highest dose (1.0 mg/kg) during the gestation period, and in animals exposed to the lowest dose of atrazine (0.1 mg/kg) during breastfeeding period. Furthermore, the highest dose (1.0 mg/kg) of atrazine reduced the sperm concentration. Furthermore, the reduced levels of reactive oxygen species (ROS) were observed at all evaluated doses in males exposed during the gestation period. These results suggest that the administration of low doses of atrazine at critical periods of development may permanently reduce the sperm quality in C. laucha.

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Acknowledgements

We thank the ReproPel team from the University of Pelotas for help with the semen analyses.

Funding

The study was financially supported by CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brasília, DF, Brazil).

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Correspondence to Graciela Quintana Saalfeld.

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The capture and maintenance of the animals were approved by the Brazilian Institute for Environmental Protection (IBAMA) through Biodiversity Information and Authorization System (SISBIO: permission no. 14174). The experimental protocols were approved by the Ethics Committee of FURG (CEUA: report no. P031/2013).

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The authors declare that there are no conflicts of interest.

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Responsible editor: Philippe Garrigues

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Saalfeld, G.Q., Varela Junior, A.S., Castro, T. et al. Atrazine exposure in gestation and breastfeeding affects Calomys laucha sperm cells. Environ Sci Pollut Res 26, 34953–34963 (2019). https://doi.org/10.1007/s11356-019-06577-x

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  • DOI: https://doi.org/10.1007/s11356-019-06577-x

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