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Oxytocin regulates marmosets’ affiliation and vocal communication

Project description

A closer look at social communication in primates

Primate social interactions are based on visual and acoustic signals, but we still do not know how social contexts influence the production and interpretation of these signals. The brain mechanisms behind this process are not fully understood, especially in complex social settings. Understanding these dynamics is key to unravelling the mysteries of the primate social brain. In this context, the ERC-funded MarmOTChat project aims to explore how oxytocin (OT), a neurohormone linked to social behavior, affects vocal communication in marmoset monkeys. By studying these primates in natural group settings, the project will use advanced techniques to examine how OT shapes brain activity and social behaviour, providing new insights into primate communication.

Objective

Primate social interactions rely heavily on visual and acoustic signalling. Yet little remains known about how social context affects how vocalisations are perceived and produced, and the neural mechanisms that support this this process. Given the complex dynamics that typify primate societies, addressing such questions remains of critical importance to elucidating the mysteries of the primate social brain.
I hypothesize that oxytocin (OT), a neurohormone that regulates social behaviour and a promising therapeutic target for psychiatric disorders, influences context-dependent effects on primate vocal communication, notably by acting in higher order brain regions involved in vocalisations and encoding social information.
I propose to explore the neural basis of socially adapted acoustic communication. To do so, I will record vocalisations from marmoset monkeys, a highly vocal primate and promising model for neuroscience, in different social contexts designed to elicit positively or negatively valenced calls between differently affiliated monkeys. Importantly, these experiments will happen in semi-natural conditions, focusing on freely moving animals expressing their normal behaviours within the colony. This is a highly novel approach that starkly contrasts with classical task-based experiments.
Additionally, using modern tools including high throughput neurophysiology, chemogenetics and intravenous viruses, I will manipulate OT neurons activity while recording from hundreds of neurons. This will enable analyses focusing on neural populations instead of single units, all wireless and without interfering with the animals behaviours.
This multidisciplinary approach will allow me to uncover some fundamental aspects of how the primate brain encodes natural conversations and adapts its response accordingly to the social context. Moreover, I will for the first time study how endogenous OT controls social behaviours in primates.

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Topic(s)

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Funding Scheme

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HORIZON-ERC - HORIZON ERC Grants

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Call for proposal

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(opens in new window) ERC-2023-STG

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Host institution

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 1 398 750,00
Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 1 398 750,00

Beneficiaries (1)

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