Sex-specific regulation of inhibition and network activity by local aromatase in the mouse hippocampus

Alicia Hernández-Vivanco, Nuria Cano-Adamuz, Alberto Sánchez-Aguilera, Alba González-Alonso, Alberto Rodríguez-Fernández, Íñigo Azcoitia, Liset Menendez de la Prida and Pablo Méndez ()
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Alicia Hernández-Vivanco: Instituto Cajal (CSIC)
Nuria Cano-Adamuz: Instituto Cajal (CSIC)
Alberto Sánchez-Aguilera: Instituto Cajal (CSIC)
Alba González-Alonso: Instituto Cajal (CSIC)
Alberto Rodríguez-Fernández: Instituto Cajal (CSIC)
Íñigo Azcoitia: Universidad Complutense de Madrid
Liset Menendez de la Prida: Instituto Cajal (CSIC)
Pablo Méndez: Instituto Cajal (CSIC)

Nature Communications, 2022, vol. 13, issue 1, 1-14

Abstract: Abstract Cognitive function relies on a balanced interplay between excitatory and inhibitory neurons (INs), but the impact of estradiol on IN function is not fully understood. Here, we characterize the regulation of hippocampal INs by aromatase, the enzyme responsible for estradiol synthesis, using a combination of molecular, genetic, functional and behavioral tools. The results show that CA1 parvalbumin-expressing INs (PV-INs) contribute to brain estradiol synthesis. Brain aromatase regulates synaptic inhibition through a mechanism that involves modification of perineuronal nets enwrapping PV-INs. In the female brain, aromatase modulates PV-INs activity, the dynamics of network oscillations and hippocampal-dependent memory. Aromatase regulation of PV-INs and inhibitory synapses is determined by the gonads and independent of sex chromosomes. These results suggest PV-INs are mediators of estrogenic regulation of behaviorally-relevant activity.

Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-31635-3

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DOI: 10.1038/s41467-022-31635-3

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