Journal articles
The GABA Developmental Shift Is Abolished by Maternal Immune Activation Already at Birth
Abstract : Epidemiological and experimental studies suggest that maternal immune activation (MIA) leads to developmental brain disorders, but whether the pathogenic mechanism impacts neurons already at birth is not known. We now report that MIA abolishes in mice the oxytocin-mediated delivery γ-aminobutyric acid (GABA) shift from depolarizing to hyperpolarizing in CA3 pyramidal neurons, and this is restored by the NKCC1 chloride importer antagonist bumetanide. Furthermore, MIA hippocampal pyramidal neurons at birth have a more exuberant apical arbor organization and increased apical dendritic length than age-matched controls. The frequency of spontaneous glutamatergic postsynaptic currents is also increased in MIA offspring, as well as the pairwise correlation of the synchronized firing of active cells in CA3. These alterations produced by MIA persist, since at P14-15 GABA action remains depolarizing, produces excitatory action, and network activity remains elevated with a higher frequency of spontaneous glutamatergic postsynaptic currents. Therefore, the pathogenic actions of MIA lead to important morphophysiological and network alterations in the hippocampus already at birth.
Cited literature [73 references]
https://hal-amu.archives-ouvertes.fr/hal-01963851
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Submitted on : Friday, December 21, 2018 - 4:10:30 PM
Last modification on : Tuesday, October 19, 2021 - 10:50:46 PM
Long-term archiving on: : Friday, March 22, 2019 - 4:21:14 PM
Contributor : Fanny Pra Connect in order to contact the contributor
Submitted on : Friday, December 21, 2018 - 4:10:30 PM
Last modification on : Tuesday, October 19, 2021 - 10:50:46 PM
Long-term archiving on: : Friday, March 22, 2019 - 4:21:14 PM
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Fernandez et al, 2018.pdf
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