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Activity-dependent modulation of synapse identity

Objective

The mature brain results from the formation of precise networks between functionally and morphologically distinct types of neurons. A given neuron forms synapses with a limited number of partners and on precise subcellular localizations. Understanding what controls this specificity is mandatory not only to understand brain functions but also the aetiology of synaptopathies such as autism spectrum disorders or schizophrenia. Various molecules define the identity of each type of synapse. Furthermore, neuronal activity-dependent mechanisms sculpt and stabilize neuronal connectivity. I posit that neuronal activity controls the molecular identity of synapses and that this regulation occurs through mechanisms specific for each neuronal population, thereby regulating synapse specificity. I focus on the olivocerebellar network, which is involved in motor control and also in cognitive processes. In this well-characterized circuit, two different excitatory inputs, the climbing fibres and the parallel fibres converge on the same target, the cerebellar Purkinje cells, compete for their non-overlapping territory and possess distinct functional, morphological and molecular characteristics. Purkinje cells thus provide an ideal model to study the molecular basis of synapse identity and its regulation. In the past years, I have developed new genetic tools to dissect the molecular characteristics of the olivocerebellar network at the neuron- and synapse–specific levels. I propose to generate new mouse models to control neuronal activity, in vivo and during development, specifically in the two Purkinje cell excitatory afferents. Combining these tools, my objectives are to describe the molecular diversity of synapses, show its control by neuronal activity, and characterize the molecular determinants of synapse identity. This study will bring a unifying view of the mechanisms controlling the development of a functional brain.

Fields of science (EuroSciVoc)

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Keywords

Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)

Programme(s)

Multi-annual funding programmes that define the EU’s priorities for research and innovation.

Topic(s)

Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.

Funding Scheme

Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.

ERC-COG - Consolidator Grant

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Call for proposal

Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.

(opens in new window) ERC-2016-COG

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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.

€ 2 000 000,00
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.

€ 2 000 000,00

Beneficiaries (1)

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