Chaihu-Shugan-San exerts an antidepressive effect by downregulating miR-124 and releasing inhibition of the MAPK14 and Gria3 signaling pathways

Dysregulation of miR-124 has been reported to be involved in the pathophysiology of depression. Chaihu-Shugan-San, a traditional Chinese medicine, has antidepressive activity; however, the underlying mechanisms remain unclear. In this study, to generate a rodent model of depression, rats were subjec...

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Bibliographic Details
Published in:Neural regeneration research 2018-05, Vol.13 (5), p.837-845
Main Authors: Liu, Qiong, Sun, Ning-Ning, Wu, Zheng-Zhi, Fan, Da-Hua, Cao, Mei-Qun
Format: Article
Language:English
Subjects:
Analysis
Care and treatment
Depression (Mood disorder)
Electron microscopy
Food
Gene expression
Health aspects
Herbal medicine
Kinases
Medical research
Mitogen-activated protein kinases
nerve regeneration
traditional Chinese medicine
Chaihu-Shugan-San
depression
open-field test
sucrose consumption test
forced swimming test
miR-124
neural plasticity
MAPK14
Gria3
neural regeneration
Nervous system
Solitary confinement
Sucrose
Swimming
Synapses
Transcription (Genetics)
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Summary:Dysregulation of miR-124 has been reported to be involved in the pathophysiology of depression. Chaihu-Shugan-San, a traditional Chinese medicine, has antidepressive activity; however, the underlying mechanisms remain unclear. In this study, to generate a rodent model of depression, rats were subjected to a combination of solitary confinement and chronic unpredictable mild stress for 28 days. Rats were intragastrically administered Chaihu-Shugan-San (2.835 mL/kg/d) for 4 weeks, once a day. Real-time reverse-transcription quantitative polymerase chain reaction, miRNA microarray, western blot assay and transmission electron microscopy demonstrated that Chaihu-Shugan-San downregulated miR-124 expression and upregulated the mRNA and protein levels of mitogen-activated protein kinase 14 (MAPK14) and glutamate receptor subunit 3 (Gria3). Chaihu-Shugan-San also promoted synapse formation in the hippocampus. The open field test, sucrose consumption test and forced swimming test were used to assess depression-like behavior. After intragastric administration of Chaihu-Shugan-San, sucrose consumption increased, while the depressive behaviors were substantially reduced. Together, these findings suggest that Chaihu-Shugan-San exerts an antidepressant-like effect by downregulating miR-124 expression and by releasing the inhibition of the MAPK14 and Gria3 signaling pathways.
ISSN:1673-5374
1876-7958
DOI:10.4103/1673-5374.232478