Increased Cell-Intrinsic Excitability Induces Synaptic Changes in New Neurons in the Adult Dentate Gyrus That Require Npas4
Name
Sim-2013-Increased cell-intrinsic excitability induces synaptic changes.pdf
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1.61 MB
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Author(s)
Lin, Yingxi
Sim, Shuyin
Antolin, Salome
Lin, Chia-Wei
Lois, Carlos
Date Issued
May 2013
Journal
Journal of Neuroscience
Publisher
Society for Neuroscience
Citation
Sim, S., S. Antolin, C.-W. Lin, Y. Lin, and C. Lois. “Increased Cell-Intrinsic Excitability Induces Synaptic Changes in New Neurons in the Adult Dentate Gyrus That Require Npas4.” Journal of Neuroscience 33, no. 18 (May 1, 2013): 7928-7940.
Version
Final published version
Abstract
Electrical activity regulates the manner in which neurons mature and form connections to each other. However, it remains unclear whether increased single-cell activity is sufficient to alter the development of synaptic connectivity of that neuron or whether a global increase in circuit activity is necessary. To address this question, we genetically increased neuronal excitability of in vivo individual adult-born neurons in the mouse dentate gyrus via expression of a voltage-gated bacterial sodium channel. We observed that increasing the excitability of new neurons in an otherwise unperturbed circuit leads to changes in both their input and axonal synapses. Furthermore, the activity-dependent transcription factor Npas4 is necessary for the changes in the input synapses of these neurons, but it is not involved in changes to their axonal synapses. Our results reveal that an increase in cell-intrinsic activity during maturation is sufficient to alter the synaptic connectivity of a neuron with the hippocampal circuit and that Npas4 is required for activity-dependent changes in input synapses.
MIT Department
Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1523/jneurosci.1571-12.2013
