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Hypothalamic circuits for the selection of defensive and mating behavior in females

Objective

Social interactions can take different courses depending on the internal state of the participants. For instance, a sexually receptive female mouse will allow a male’s attempt to mount her, but a non-receptive female will fight or flee the same male. Here, we propose to determine how neuronal circuits in the female mouse brain support flexible, state-dependent interactions with male conspecifics. It is known that female receptivity depends on the ventrolateral region of the ventromedial hypothalamus. Within this region there is a population of neurons that expresses receptors for the sex hormone progesterone (PR+ neurons), whose levels cycle with reproductive state. In pilot experiments, we found that PR+ neurons are not homogeneous: some respond during receptive behaviors but others respond during defensive or aggressive behaviors. Our main objective is to determine how female hypothalamic PR+ neurons participate in state-dependent behavioral responses to males. Our hypothesis is that two subpopulations of PR+ neurons are differentially modulated by the reproductive cycle and that each sub-population activates a different downstream circuit, one specialized for receptive and the other for defensive behaviors. Our specific aims are to: (1) characterize the functional selectivity of individual female PR+ neurons across the reproductive cycle; (2) map the connectivity of PR+ neurons to their output targets; (3) test the impact of different PR+ output pathways by genetically activating and silencing them; and (4) determine how reproductive hormones modulate the synaptic and intrinsic functional properties of PR+ neurons. These studies will elucidate the neuronal circuit mechanisms of a biologically essential female behavior. More broadly, this work will reveal mechanisms by which neuronal circuits can support flexible state-dependent adaptive behaviors.

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Programme(s)

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Topic(s)

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Funding Scheme

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ERC-COG - Consolidator Grant

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Call for proposal

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(opens in new window) ERC-2017-COG

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Host institution

FUNDACAO D. ANNA DE SOMMER CHAMPALIMAUD E DR. CARLOS MONTEZ CHAMPALIMAUD
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.

€ 1 952 188,00
Address
AVENIDA BRASILIA, CENTRO DE INVESTIGACAO DA FUNDACAO CHAMPALIMAUD
1400-038 LISBOA
Portugal

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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.

€ 1 952 188,00

Beneficiaries (1)

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