Mediodorsal and Ventromedial Thalamus Engage Distinct L1 Circuits in the Prefrontal Cortex.
Mediodorsal and Ventromedial Thalamus Engage Distinct L1 Circuits in the Prefrontal Cortex.
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内侧丘脑和腹内侧丘脑参与前额皮质中不同的 L1 回路。
DOI:
10.1016/j.neuron.2020.10.031
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发表时间:
2021-01-20
期刊:
影响因子:
16.2
通讯作者:
Carter AG
中科院分区:
文献类型:
--
作者:
Anastasiades PG;Collins DP;Carter AG
Interactions between the thalamus and prefrontal cortex (PFC) play a critical role in cognitive function and arousal. Here we use anatomical tracing, electrophysiology, optogenetics, and 2-photon Ca2+ imaging to determine how ventromedial (VM) and mediodorsal (MD) thalamus target specific cell types and subcellular compartments in layer 1 (L1) of mouse PFC. We find thalamic inputs make distinct connections in L1, where VM engages NDNF+ cells in L1a, and MD drives VIP+ cells in L1b. These separate populations of L1 interneurons participate in different inhibitory networks in superficial layers by targeting either PV+ or SOM+ interneurons. NDNF+ cells also inhibit the apical dendrites of L5 pyramidal tract (PT) cells to suppress AP-evoked Ca2+ signals. Lastly, NDNF+ cells mediate a unique form of thalamus-evoked inhibition at PT cells, selectively blocking VM-evoked dendritic Ca2+ spikes. Together, our findings reveal how two thalamic nuclei differentially communicate with the PFC through distinct L1 micro-circuits. Anastasiades et al. show how VM and MD thalamus differentially engage NDNF and VIP interneurons located in L1 of the mouse prefrontal cortex. These interneurons participate in distinct inhibitory and disinhibitory micro-circuits, with feed-forward inhibition via NDNF interneurons regulating VM-evoked Ca2+ signals in the apical dendrites of L5 pyramidal cells.
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