Scn2a Haploinsufficiency in Mice Suppresses Hippocampal Neuronal Excitability, Excitatory Synaptic Drive, and Long-Term Potentiation, and Spatial Learning and Memory.

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Title
Scn2a Haploinsufficiency in Mice Suppresses Hippocampal Neuronal Excitability, Excitatory Synaptic Drive, and Long-Term Potentiation, and Spatial Learning and Memory.
Author(s)
Wangyong Shin; Hanseul Kweon; Ryeonghwa Kang; Doyoun Kim; Kyungdeok Kim; Muwon Kang; Seo Yeong Kim; Sun Nam Hwang; Jin Yong Kim; Esther Yang; Hyun Kim; Eunjoon Kim
Publication Date
2019-06
Journal
FRONTIERS IN MOLECULAR NEUROSCIENCE, v.12, no., pp.145 - 145
Publisher
FRONTIERS MEDIA SA
Abstract
Nav1.2, a voltage-gated sodium channel subunit encoded by the Scn2a gene, has been implicated in various brain disorders, including epilepsy, autism spectrum disorder, intellectual disability, and schizophrenia. Nav1.2 is known to regulate the generation of action potentials in the axon initial segment and their propagation along axonal pathways. Nav1.2 also regulates synaptic integration and plasticity by promoting back-propagation of action potentials to dendrites, but whether Nav1.2 deletion in mice affects neuronal excitability, synaptic transmission, synaptic plasticity, and/or disease-related animal behaviors remains largely unclear. Here, we report that mice heterozygous for the Scn2a gene (Scn2a +/- mice) show decreased neuronal excitability and suppressed excitatory synaptic transmission in the presence of network activity in the hippocampus. In addition, Scn2a +/- mice show suppressed hippocampal long-term potentiation (LTP) in association with impaired spatial learning and memory, but show largely normal locomotor activity, anxiety-like behavior, social interaction, repetitive behavior, and whole-brain excitation. These results suggest that Nav1.2 regulates hippocampal neuronal excitability, excitatory synaptic drive, LTP, and spatial learning and memory in mice. Copyright © 2019 Shin, Kweon, Kang, Kim, Kim, Kang, Kim, Hwang, Kim, Yang, Kim and Kim.
URI
https://pr.ibs.re.kr/handle/8788114/6172
ISSN
1662-5099
Appears in Collections:
Center for Synaptic Brain Dysfunctions(시냅스 뇌질환 연구단) > Journal Papers (저널논문)
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