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Dr
MRC Laboratory of Molecular Biology, Cambridge
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Schedule
Tuesday, March 9, 2021
3:00 PM Europe/London
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Recording provided by the organiser.
Domain
NeuroscienceHost
Cambridge Neuro
Duration
70 minutes
The serotonin system is the most frequently targeted neural system pharmacologically for treating psychiatric disorders, including depression and anxiety. Serotonin neurons of the dorsal and median raphe nuclei (DR, MR) collectively innervate the entire forebrain and midbrain, modulating diverse physiology and behaviour. By using viral-genetic methods, we found that DR serotonin system contains parallel sub-systems that differ in input and output connectivity, physiological response properties, and behavioural functions. To gain a fundamental understanding of the molecular heterogeneity of DR and MR, we used single-cell RNA - sequencing (scRNA-seq) to generate a comprehensive dataset comprising eleven transcriptomically distinct serotonin neuron clusters. We generated novel intersectional viral-genetic tools to access specific subpopulations. Whole-brain axonal projection mapping revealed that the molecular features of these distinct serotonin groups reflect their anatomical organization and provide tools for future exploration of the full projection map of molecularly defined serotonin groups. The molecular architecture of serotonin system lays the foundation for integrating anatomical, neurochemical, physiological, and behavioural functions.
Jing Ren
Dr
MRC Laboratory of Molecular Biology, Cambridge
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