A population of Insula neurons encodes for social preference only after acute social isolation in mice

Christelle Glangetas (), Adriane Guillaumin, Elodie Ladevèze, Anaelle Braine, Manon Gauthier, Léa Bonamy, Evelyne Doudnikoff, Thibault Dhellemmes, Marc Landry, Erwan Bézard, Stephanie Caille, Anne Taupignon, Jérôme Baufreton and François Georges ()
Additional contact information
Christelle Glangetas: IMN
Adriane Guillaumin: IMN
Elodie Ladevèze: IMN
Anaelle Braine: IMN
Manon Gauthier: IMN
Léa Bonamy: IMN
Evelyne Doudnikoff: IMN
Thibault Dhellemmes: IMN
Marc Landry: IMN
Erwan Bézard: IMN
Stephanie Caille: INCIA
Anne Taupignon: IMN
Jérôme Baufreton: IMN
François Georges: IMN

Nature Communications, 2024, vol. 15, issue 1, 1-18

Abstract: Abstract The Insula functions as a multisensory relay involved in socio-emotional processing with projections to sensory, cognitive, emotional, and motivational regions. Notably, the interhemispheric projection from the Insula to the contralateral Insula is a robust yet underexplored connection. Using viral-based tracing neuroanatomy, ex vivo and in vivo electrophysiology, in vivo fiber photometry along with targeted circuit manipulation, we elucidated the nature and role of InsulaIns communication in social and anxiety processing in mice. In this study, we 1) characterized the anatomical and molecular profile of the InsulaIns neurons, 2) demonstrated that stimulation of this neuronal subpopulation induces excitation in the Insula interhemispheric circuit, 3) revealed that InsulaIns neurons are essential for social discrimination after 24 h of isolation in male mice. In conclusion, our findings highlight InsulaIns neurons as a distinct class of neurons within the insula and offer new insights into the neuronal mechanisms underlying social behavior.

Date: 2024
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DOI: 10.1038/s41467-024-51389-4

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