Development of Depotentiation in Adult-Born Dentate Granule Cells

Xiaoqing Tao; Ning Sun; Yangling Mu

doi:10.3389/fcell.2019.00236

Development of Depotentiation in Adult-Born Dentate Granule Cells

Front Cell Dev Biol. 2019 Oct 16:7:236. doi: 10.3389/fcell.2019.00236. eCollection 2019.

Authors

Xiaoqing Tao¹, Ning Sun^{2

3}, Yangling Mu^{1

3

4}

Affiliations

¹ Department of Physiology, School of Basic Medicine, Huazhong University of Science and Technology, Wuhan, China.
² Department of Neurobiology, School of Basic Medicine, Huazhong University of Science and Technology, Wuhan, China.
³ Institute of Brain Research, Collaborative Innovation Center for Brain Science, Huazhong University of Science and Technology, Wuhan, China.
⁴ Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Huazhong University of Science and Technology, Wuhan, China.

Abstract

Activity-dependent synaptic plasticity, i.e., long-term potentiation (LTP), long-term depression (LTD) and LTP reversal, is generally thought to make up the cellular mechanism underlying learning and memory in the mature brain, in which N-methyl-D-aspartate subtype of glutamate (NMDA) receptors and neurogenesis play important roles. LTP reversal may be the mechanism of forgetting and may mediate many psychiatric disorders, such as schizophrenia, but the specific mechanisms underlying these disorders remain unclear. In addition, LTP reversal during the development of adult-born dentate granule cells (DGCs) remains unknown. We found that the expression of the NMDA receptor subunits NR2A and NR2B displayed dynamic changes during the development of postnatal individuals and the maturation of adult-born neurons and was coupled with the change in LTP reversal. The susceptibility of LTP reversal progressively increases with the rise in the expression of NR2A during the development of postnatal individual and adult-born neurons. In addition, NMDA receptor subunits NR2A, but not NR2B, mediated LTP reversal in the DGCs of the mouse hippocampus.

Keywords: LTP; LTP reversal; NR2A; adult-born; dentate granule cells; hippocampus.