Forro, Thomas; Volitaki, Emmanouela; Malagon-Vina, Hugo; Klausberger, Thomas; Nevian, Thomas; Ciocchi, Stéphane (2022). Anxiety-related activity of ventral hippocampal interneurons. Progress in neurobiology, 219(102368), p. 102368. Elsevier 10.1016/j.pneurobio.2022.102368
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Anxiety is an aversive mood reflecting the anticipation of potential threats. The ventral hippocampus (vH) is a key brain region involved in the genesis of anxiety responses. Recent studies have shown that anxiety is mediated by the activation of vH pyramidal neurons targeting various limbic structures. Throughout the cortex, the activity of pyramidal neurons is controlled by GABA-releasing inhibitory interneurons and the GABAergic system represents an important target of anxiolytic drugs. However, how the activity of vH inhibitory interneurons is related to different anxiety behaviours has not been investigated so far. Here, we integratedin vivoelectrophysiology with behavioural phenotyping of distinct anxiety exploration behaviours in rats. We showed that pyramidal neurons and interneurons of the vH are selectively active when animals explore specific compartments of the elevated-plus-maze (EPM), an anxiety task for rodents. Moreover, rats with prior goal-related experience exhibited low-anxiety exploratory behaviour and showed a larger trajectory-related activity of vH interneurons during EPM exploration compared to high anxiety rats. Finally, in low anxiety rats, trajectory-related vH interneurons exhibited opposite activity to pyramidal neurons specifically in the open arms (i.e. more anxiogenic) of the EPM. Our results suggest that vH inhibitory micro-circuits could act as critical elements underlying different anxiety states.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Physiology |
UniBE Contributor: |
Forro, Thomas, Volitaki, Emmanouela, Nevian, Thomas, Ciocchi, Stéphane Pierre |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1873-5118 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
25 Oct 2022 12:53 |
Last Modified: |
06 Dec 2022 00:15 |
Publisher DOI: |
10.1016/j.pneurobio.2022.102368 |
PubMed ID: |
36273721 |
Uncontrolled Keywords: |
Anxiety-related behaviour and activity trajectory-related activity, interneuron-pyramidal neuron interactions ventral hippocampus |
BORIS DOI: |
10.48350/174066 |
URI: |
https://boris.unibe.ch/id/eprint/174066 |
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