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Loss of mGlu5 receptors in somatostatin-expressing neurons alters negative emotional states
Abstract Subtype 5 metabotropic glutamate receptors (mGlu 5 ) are known to play an important role in regulating cognitive, social and valence systems. However, it remains largely unknown at which circuits and neuronal types mGlu 5 act to influence these behavioral domains. Altered tissue- or cell-sp...
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Published in: | Molecular psychiatry 2024-04 |
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Main Authors: | , , , , , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites |
Online Access: | Get full text |
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Summary: | Abstract
Subtype 5 metabotropic glutamate receptors (mGlu
5
) are known to play an important role in regulating cognitive, social and valence systems. However, it remains largely unknown at which circuits and neuronal types mGlu
5
act to influence these behavioral domains. Altered tissue- or cell-specific expression or function of mGlu
5
has been proposed to contribute to the exacerbation of neuropsychiatric disorders. Here, we examined how these receptors regulate the activity of somatostatin-expressing (SST+) neurons, as well as their influence on behavior and brain rhythmic activity. Loss of mGlu
5
in SST+ neurons elicited excitatory synaptic dysfunction in a region and sex-specific manner together with a range of emotional imbalances including diminished social novelty preference, reduced anxiety-like behavior and decreased freezing during retrieval of fear memories. In addition, the absence of mGlu
5
in SST+ neurons during fear processing impaired theta frequency oscillatory activity in the medial prefrontal cortex and ventral hippocampus. These findings reveal a critical role of mGlu
5
in controlling SST+ neurons excitability necessary for regulating negative emotional states. |
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ISSN: | 1359-4184 1476-5578 |
DOI: | 10.1038/s41380-024-02541-5 |