Glyphosate and glyphosate-based herbicide exposure during the peripartum period affects maternal brain plasticity, maternal behaviour and microbiome

Abstract : Glyphosate is found in a large array of non-selective herbicides such as Roundup® (Monsanto, Creve Coeur, MO, USA) and is by far the most widely used herbicide. Recent work in rodent models suggests that glyphosate-based herbicides during development can affect neuronal communication and result in altered behaviours, albeit through undefined mechanisms of action. To our knowledge, no study has investigated the effects glyphosate or its formulation in herbicide on maternal behaviour and physiology. In the present study, relatively low doses of glyphosate (5 mg kg  d ), Roundup® (5 mg kg  d glyphosate equivalent), or vehicle were administered by ingestion to Sprague-Dawley rats from gestational day (GD) 10 to postpartum day (PD)22. The treatments significantly altered licking behaviour toward pups between PD2 and PD6. We also show in the dams at PD22 that Roundup exposure affected the maturation of doublecortin-immunoreactive new neurones in the dorsal dentate gyrus of the hippocampus of the mother. In addition, the expression of synaptophysin was up-regulated by glyphosate in the dorsal and ventral dentate gyrus and CA3 regions of the hippocampus, and down-regulated in the cingulate gyrus. Although a direct effect of glyphosate alone or its formulation on the central nervous system is currently not clear, we show that gut microbiota is significantly altered by the exposure to the pesticides, with significant alteration of the phyla Bacteroidetes and Firmicutes. This is the first study to provide evidence that glyphosate alone or in formulation (Roundup) differentially affects maternal behaviour and modulates neuroplasticity and gut microbiota in the mother.
Complete list of metadatas

Cited literature [150 references]  Display  Hide  Download

https://hal-univ-rennes1.archives-ouvertes.fr/hal-02153623
Contributor : Laurent Jonchère <>
Submitted on : Monday, July 1, 2019 - 3:15:09 PM
Last modification on : Thursday, July 11, 2019 - 1:02:34 AM

File

 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : 2019-11-07

Please log in to resquest access to the document

Identifiers

Citation

Julie Dechartres, Jodi L Pawluski, Marie-Madeleine Gueguen, Amin Jablaoui, Emmanuelle Maguin, et al.. Glyphosate and glyphosate-based herbicide exposure during the peripartum period affects maternal brain plasticity, maternal behaviour and microbiome. Journal of Neuroendocrinology, Wiley, 2019, pp.e12731. ⟨10.1111/jne.12731⟩. ⟨hal-02153623⟩

Share

Metrics

Record views

128