Lateral dispersion is required for circuit integration of newly generated dentate granule cells

Jia Wang, Jia Shen, Gregory W. Kirschen, Yan Gu, Sebastian Jessberger and Shaoyu Ge ()
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Jia Wang: SUNY at Stony Brook
Jia Shen: SUNY at Stony Brook
Gregory W. Kirschen: SUNY at Stony Brook
Yan Gu: SUNY at Stony Brook
Sebastian Jessberger: University of Zurich
Shaoyu Ge: SUNY at Stony Brook

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract The process of circuit integration of newly-generated dentate granule cells of the hippocampus has been presumed to be a dynamic process. In fact, little is known regarding the initial development of newly generated neurons prior to circuit integration and the significance of this stage for circuit integration. Here, using advanced live imaging methods, we systematically analyze the dynamic dispersion of newly generated neurons in the neurogenic zone and observe that cells that are physically adjacent coordinate their lateral dispersion. Whole-cell recordings of adjacent newly generated neurons reveal that they are coupled via gap junctions. The dispersion of newly generated cells in the neurogenic zone is restricted when this coupling is disrupted, which severely impairs their subsequent integration into the hippocampal circuit. The results of this study reveal that the dynamic dispersion of newly generated dentate granule cells in the neurogenic zone is a required developmental stage for circuit integration.

Date: 2019
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DOI: 10.1038/s41467-019-11206-9

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