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SerotoninSleep

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SEROTONERGIC REGULATION OF SLEEP RELATED NEURAL CIRCUIT

Summary: The appropriate regulation of sleep and wakefulness is a fundamental biological process that impacts human health, cognitive performance, and quality of life. However, the neural mechanisms regulating sleep/wake behavior... ver más

31/08/2015

UNIVERSITY COLLEGE...

231K€

Presupuesto del proyecto: 231K€

Líder del proyecto

UNIVERSITY COLLEGE LONDON No se ha especificado una descripción o un objeto social para esta compañía.

Fecha límite participación Sin fecha límite de participación.

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Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2015-08-31 No tenemos la información de la convocatoria

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2 Participantes

UNIVERSITY COLLEGE LONDON

231.28K€ | Lider

UNIVERSITY COLLEGE LONDON

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Líder del proyecto

UNIVERSITY COLLEGE LONDON No se ha especificado una descripción o un objeto social para esta compañía.

Presupuesto del proyecto 231K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Summary: The appropriate regulation of sleep and wakefulness is a fundamental biological process that impacts human health, cognitive performance, and quality of life. However, the neural mechanisms regulating sleep/wake behavior and its associated circuits in the brain are largely unknown. Recent studies have illustrated the role of hypocretin/orexin (Hcrt) in sleep regulation, but the mechanisms that control the Hcrt system and subsequent changes in neural circuit function are still poorly described. I will take advantage of the larval zebrafish, a genetically and optically accessible model organism whose brain shares basic sleep-related structures with the human brain, in order to systematically investigate how and to what extent serotonergic (5-hydroxytrypamine, 5-HT) neurons of the dorsal raphe nucleus exert effects on sleep cycles via the Hcrt system and associated downstream circuitry. Furthermore, I will disambiguate whether 5-HT neurons affect sleep by direct influence on Hcrt neuron activity or by signalling downsteam on Hcrt target neurons. These analyses require a multidisciplinary approach possible only in zebrafish. First, I will use a novel bioluminescence-based method to investigate how drugs that target the 5-HT system, alter the activity of Hcrt and 5-HT neurons in freely behaving fish. Second, in order to verify a causal relationship between activity in 5-HT and Hcrt neurons and observed behavioral changes, I will activate the same neural populations with optogenetic methods while monitoring behavior in freely behaving fish. Third, I will use the same pharmacological and optogenetic approaches to visualize the direct effects of specific subpopulations of 5-HT and Hcrt neurons on activity throughout the whole brain with functional two-photon calcium imaging. The results of these experiments will provide invaluable insights into how specific neuromodulatory systems interact with each other in order to regulate neural circuits underlying sleep.

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