Abstract
Early-life stress has been linked to multiple neurodevelopmental and neuropsychiatric deficits. Our previous studies have linked maternal presence/absence from the nest in developing rat pups to changes in prefrontal cortex (PFC) activity. Furthermore, we have shown that these changes are modulated by serotonergic signaling. Here we test whether changes in PFC activity during early life affect the developing cortex leading to behavioral alterations in the adult. We show that inhibiting the PFC of mouse pups leads to cognitive deficits in the adult comparable to those seen following maternal separation. Moreover, we show that activating the PFC during maternal separation can prevent these behavioral deficits. To test how maternal separation affects the transcriptional profile of the PFC we performed single-nucleus RNA-sequencing. Maternal separation led to differential gene expression almost exclusively in inhibitory neurons. Among others, we found changes in GABAergic and serotonergic pathways in these interneurons. Interestingly, both maternal separation and early-life PFC inhibition led to changes in physiological responses in prefrontal activity to GABAergic and serotonergic antagonists that were similar to the responses of more immature brains. Prefrontal activation during maternal separation prevented these changes. These data point to a crucial role of PFC activity during early life in behavioral expression in adulthood.
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Data availability
snRNA-seq data have been deposited in the NCBI Gene Expression Omnibus (GEO) database and are publicly accessible through GEO accession number GSE254342.
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Acknowledgements
This work has been supported by the National Institute of Child Health and Human Development (R01HD095966 and R01HD110541). We thank Catarina Cunha for setting up and training in the VSD experiments.
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CMT designed the experiments and supervised the project. ECM, CMT, LR, and FA performed the behavioral manipulations, physiological experiments, and analyzed the data. DAW set up the in vivo recordings. MJA performed the pathway analysis. HG, RF, and AC designed, performed, and analyzed the snRNA sequencing experiments. DS designed and supervised the patch-clamp experiments. CMT and FXC wrote the paper with contributions from all co-authors.
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Menezes, E.C., Geiger, H., Abreu, F.F. et al. Early-life prefrontal cortex inhibition and early-life stress lead to long-lasting behavioral, transcriptional, and physiological impairments. Mol Psychiatry (2024). https://doi.org/10.1038/s41380-024-02499-4
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DOI: https://doi.org/10.1038/s41380-024-02499-4