Scientific article
Open access

Serotonin receptor 3A controls interneuron migration into the neocortex

Published inNature communications, vol. 5, 5524
Publication date2014

Neuronal excitability has been shown to control the migration and cortical integration of reelin-expressing cortical interneurons (INs) arising from the caudal ganglionic eminence (CGE), supporting the possibility that neurotransmitters could regulate this process. Here we show that the ionotropic serotonin receptor 3A (5-HT(3A)R) is specifically expressed in CGE-derived migrating interneurons and upregulated while they invade the developing cortex. Functional investigations using calcium imaging, electrophysiological recordings and migration assays indicate that CGE-derived INs increase their response to 5-HT(3A)R activation during the late phase of cortical plate invasion. Using genetic loss-of-function approaches and in vivo grafts, we further demonstrate that the 5-HT(3A)R is cell autonomously required for the migration and proper positioning of reelin-expressing CGE-derived INs in the neocortex. Our findings reveal a requirement for a serotonin receptor in controlling the migration and laminar positioning of a specific subtype of cortical IN.

Citation (ISO format)
MURTHY, Sahana et al. Serotonin receptor 3A controls interneuron migration into the neocortex. In: Nature communications, 2014, vol. 5, p. 5524. doi: 10.1038/ncomms6524
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Article (Published version)
ISSN of the journal2041-1723

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