期刊
CEREBRAL CORTEX
卷 29, 期 4, 页码 1509-1519出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bhy047
关键词
intranasal administration; major depression disorder; miR-214; beta-catenin
资金
- Foundation for Innovative Research Groups of National Natural Science Foundation of China [81721005]
- National Basic Research Program of China (973 Program) [2014CB744601]
- National Natural Science Foundation of China (NSFC) [81473198, 81173039, 81471377]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13016]
beta-Catenin has been implicated in major depressive disorder (MDD), which is associated with synaptic plasticity and dendritic arborization. MicroRNAs (miRNA) are small noncoding RNAs containing about 22 nucleotides and involved in a variety of physiological and pathophysiological process, but their roles in MDD remain largely unknown. Here, we investigated the expression and function of miRNAs in the mouse model of chronic social defeat stress (CSDS). The regulation of beta-catenin by selected miRNA was validated by silico prediction, target gene luciferase reporter assay, and transfection experiment in neurons. We demonstrated that the levels of miR-214-3p, which targets beta-catenin transcripts were significantly increased in the medial prefrontal cortex (mPFC) of CSDS mice. Antagomir-214-3p, a neutralizing inhibitor of miR-214-3p, increased the levels of beta-catenin and reversed the depressive-like behavior in CSDS mice. Meanwhile, antagomir-214-3p increased the amplitude of miniature excitatory postsynaptic current (mEPSC) and the number of dendritic spines in mPFC of CSDS mice, which may be related to the elevated expression of cldn1. Furthermore, intranasal administered antagomir-214-3p also significantly increased the level of beta-catenin and reversed the depressive-like behaviors in CSDS mice. These results may represent a new therapeutic target for MDD.
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