2019
DOI: 10.1016/j.neuron.2019.03.036
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Neocortical Projection Neurons Instruct Inhibitory Interneuron Circuit Development in a Lineage-Dependent Manner

Abstract: Neocortical circuits are comprised of intermingled excitatory projection neuron and inhibitory interneuron subtypes. Wester et al. show that fate-switching corticocortical projection neurons to a subcerebral type selectively influences the lamination, circuit integration, and gene transcription of CGE-derived interneurons.

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Cited by 55 publications
(62 citation statements)
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“…VIP+ interneurons (INs) represent one of the major subtypes of 5-HT 3A R-expressing GABAergic interneuron (Lee et al, 2010;Rudy et al, 2011) that originate from the ventricular zone of the caudal ganglionic eminence (CGE) in the embryonic telencephalon. In line with other CGE-derived INs, VIP+ INs preferentially populate supragranular layers of neocortex within the first postnatal week (Miyoshi and Fishell, 2011) under the control of serotonin (5-HT) (Frazer et al, 2015), the transcription factor Prox1 (Miyoshi et al, 2015), and local cues from pyramidal cells (Wester et al, 2019). Three lines of evidence suggest that VIP+ INs represent a key neuronal population that orchestrates sensory-motor processing and a valid target for our investigation: first, VIP+ INs have been shown to play a key role in integrating local and long range inputs in the mature brain (Lee et al, 2013;Wall et al, 2016;Zhang et al, 2014), despite only comprising a small fraction of the total neuronal population in neocortex (Rudy et al, 2011;Xu et al, 2010).…”
Section: Introductionmentioning
confidence: 64%
See 1 more Smart Citation
“…VIP+ interneurons (INs) represent one of the major subtypes of 5-HT 3A R-expressing GABAergic interneuron (Lee et al, 2010;Rudy et al, 2011) that originate from the ventricular zone of the caudal ganglionic eminence (CGE) in the embryonic telencephalon. In line with other CGE-derived INs, VIP+ INs preferentially populate supragranular layers of neocortex within the first postnatal week (Miyoshi and Fishell, 2011) under the control of serotonin (5-HT) (Frazer et al, 2015), the transcription factor Prox1 (Miyoshi et al, 2015), and local cues from pyramidal cells (Wester et al, 2019). Three lines of evidence suggest that VIP+ INs represent a key neuronal population that orchestrates sensory-motor processing and a valid target for our investigation: first, VIP+ INs have been shown to play a key role in integrating local and long range inputs in the mature brain (Lee et al, 2013;Wall et al, 2016;Zhang et al, 2014), despite only comprising a small fraction of the total neuronal population in neocortex (Rudy et al, 2011;Xu et al, 2010).…”
Section: Introductionmentioning
confidence: 64%
“…Our results point to subtle deficits in the layer location and synaptic integration of VIP+ INs within the local S1BF circuit following cell autonomous deletion of Prox1 in VIP+ INs; deficits that have consequences for sensory processing in the juvenile mouse. The selective impact on local connections points to a failure of VIP+ INs to appropriately interpret normal columnar signals for synaptic integration (Miyoshi et al, 2015;Wester et al, 2019) following deletion of this transcription factor. Altered molecular machinery could include members of the neurexin -neuroligin synaptic organizer protein family that are selectively expressed by Prox1+ INs (Lukacsovich et al, 2019), and have the ability to differentially regulate local versus long-range glutamatergic connections (Pregno et al, 2013).…”
Section: Discussionmentioning
confidence: 99%
“…2c). These results suggest that interneurons acquire region-specific components of their molecular identities (see also 24,25 ), and that these details are shared across species and most strongly among close relatives.…”
Section: Introductionmentioning
confidence: 84%
“…The cellular sources of these cell-extrinsic signals are likely to be diverse. Among the most studied, PNs located in deep and superficial cortical layers regulate the differential laminar distribution of cortical INs Lodato et al 2011;Wester et al 2019), but the molecular mechanisms through which distinct sets of PNs control the allocation of different types of cortical INs into specific cortical layers remains quite unexplored. It has been proposed that INs and PNs, eventually paired into cortical circuits, express complementary molecules which ultimately control the lamination of INs.…”
Section: Sema3a As a Cue Regulating The Allocation Of Cortical Hinsmentioning
confidence: 99%
“…In addition to these cell-intrinsic mechanisms, glutamatergic projection neurons (PNs) are able to influence the lamination of cortical INs. Namely, ectopic deep layer PNs can recruit LHX6 + INs (Lodato et al 2011), while Satb2-expressing interhemispheric PNs from the visual cortex control cortical integration of hINs (Wester et al 2019). How PNs settling into the cortical plate attract migrating INs has been well documented for MGE-derived INs (Bartolini et al 2017) but the molecular mechanisms that regulate their laminar allocation is yet poorly elucidated.…”
Section: Introductionmentioning
confidence: 99%