SCIENCE@home

Electrical coupling regulates layer 1 interneuron microcircuit formation in the neocortex

Xing-Hua Yao,Min Wang,Xiangnan He,Fei He,Shu-Qing Zhang,Wenlian Lu,Z. Qiu,Yong-Chun Yu

Published 2016 in Nature Communications

ABSTRACT

The coexistence of electrical and chemical synapses among interneurons is essential for interneuron function in the neocortex. However, it remains largely unclear whether electrical coupling between interneurons influences chemical synapse formation and microcircuit assembly during development. Here, we show that electrical and GABAergic chemical connections robustly develop between interneurons in neocortical layer 1 over a similar time course. Electrical coupling promotes action potential generation and synchronous firing between layer 1 interneurons. Furthermore, electrically coupled interneurons exhibit strong GABA-A receptor-mediated synchronous synaptic activity. Disruption of electrical coupling leads to a loss of bidirectional, but not unidirectional, GABAergic connections. Moreover, a reduction in electrical coupling induces an increase in excitatory synaptic inputs to layer 1 interneurons. Together, these findings strongly suggest that electrical coupling between neocortical interneurons plays a critical role in regulating chemical synapse development and precise formation of circuits. Electrical and chemical synapses coexist in neocortex interneurons. Here, Yao et al. show that during development, electrical and GABAergic chemical synapses form at the same time, and that this coupling synchronizes firing between layer 1 interneurons.

PUBLICATION RECORD

CITATION MAP

EXTRACTION MAP

CLAIMS

  • No claims are published for this paper.

CONCEPTS

  • No concepts are published for this paper.

REFERENCES

Showing 1-70 of 70 references · Page 1 of 1

CITED BY

Showing 1-29 of 29 citing papers · Page 1 of 1