Memory Susceptibility to Retroactive Interference Is Developmentally Regulated by NMDA Receptors

被引:9
作者
Ge, Minyan [1 ]
Song, Huina [1 ]
Li, Hua [1 ]
Li, Ranran [1 ]
Tao, Xiaoqing [1 ]
Zhan, Xu [2 ]
Yu, Nana [1 ]
Sun, Ning [2 ,3 ]
Lu, Youming [1 ,3 ]
Mu, Yangling [1 ,3 ,4 ]
机构
[1] Huazhong Univ Sci & Technol, Dept Physiol, Sch Basic Med, Wuhan 430030, Hubei, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Basic Med, Dept Neurobiol, Wuhan 430030, Hubei, Peoples R China
[3] Huazhong Univ Sci & Technol, Inst Brain Res, Collaborat Innovat Ctr Brain Sci, Wuhan 430030, Hubei, Peoples R China
[4] Huazhong Univ Sci & Technol, Hubei Key Lab Drug Target Res & Pharmacodynam Eva, Wuhan 430030, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
LONG-TERM POTENTIATION; SYNAPTIC PLASTICITY; SUBUNIT COMPOSITION; AMPA RECEPTORS; FEAR MEMORY; LTP; DEPOTENTIATION; MECHANISM; REVERSAL; CONSOLIDATION;
D O I
10.1016/j.celrep.2019.01.098
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Retroactive interference (RI) occurs when new incoming information impairs an existing memory, which is one of the primary sources of forgetting. Although long-term potentiation (LTP) reversal shows promise as the underlying neural correlate, the key molecules that control the sensitivity of memory circuits to RI are unknown, and the developmental trajectory of RI effects is unclear. Here we found that depotentiation in the hippocampal dentate gyrus (DG) depends on GluN2A-containing NMDA receptors (NMDARs). The susceptibility of LTP to disruption progressively increases with the rise in the GluN2A/GluN2B ratio during development. The vulnerability of hippocampus-dependent memory to interference from post-learning novelty exploration is subject to similar developmental regulation by NMDARs. Both GluN2A overexpression and GluN2B downregulation in the DG promote RI-induced forgetting. Altogether, our results suggest that a switch in GluN2 subunit predominance may confer age-related differences to depotentiation and underlie the developmental decline in memory resistance to RI.
引用
收藏
页码:2052 / +
页数:16
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