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Decoding neural circuits controlling sleep drive and sedation

Objective

Sleep and anaesthesia are both commonplace states that involve reversible loss of consciousness. However, the precise regulatory mechanisms underlying both still remain elusive, particularly at the circuitry level. Previous studies suggest that sleep is homeostatically regulated and it has been proposed that the interaction between circadian rhythm and intrinsic sleep drive determines sleep status. Although much efforts have been made, the sleep field still lacks clarity regarding the nature of the “sleep drive” as well as how it modulates sleep homeostasis. My host lab recently revealed that neuronal ensembles in the PO area, particularly in the lateral PO (LPO) area, a small region at the base of the brain that contains a mixture of sleep-active, wake-active, and temperature-sensitive neurons, are selectively activated during recovery sleep and drug-induced sedation. These results indicate that the LPO neurons are able to sense the sleep drive. In this proposal my goal is to identify LPO associated functional connectivity encoding sleep drive and sedation. By combining TetTagging functional ensembles of neurons with in vitro and in vivo optogenetics, electrophysiology and imaging techniques in mouse, I aim to 1) evaluate alterations of excitatory/inhibitory inputs onto the defined LPO neurons during prolonged wakefulness and sedation; 2) identify the origin of inputs onto the defined LPO neurons; 3) tdetermine the effects of altered connectivity involving active LPO neurons on sleep and sedation status in vivo. The results of the proposed research will provide novel insights into the regulatory mechanisms underlying sedation and the homeostatic drive of sleep.

Fields of science (EuroSciVoc)

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Programme(s)

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Topic(s)

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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.

MSCA-IF-EF-ST - Standard EF

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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) H2020-MSCA-IF-2016

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Coordinator

IMPERIAL COLLEGE OF SCIENCE TECHNOLOGY AND MEDICINE
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.

€ 183 454,80
Address
SOUTH KENSINGTON CAMPUS EXHIBITION ROAD
SW7 2AZ London
United Kingdom

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Region
London Inner London — West Westminster
Activity type
Higher or Secondary Education Establishments
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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.

€ 183 454,80
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