期刊
NEUROPSYCHIATRIC DISEASE AND TREATMENT
卷 15, 期 -, 页码 685-700出版社
DOVE MEDICAL PRESS LTD
DOI: 10.2147/NDT.S200264
关键词
stress; depression; nucleus accumbens; miRNA; mRNA
资金
- Scientific Innovation Team of Shandong University of Traditional Chinese Medicine
- National Natural Science Foundation of China [81673852, 81603419]
- Shandong Province University Scientific Research Project [J18KZ014]
- Shandong Medical Health Technology Development Plan Project [2018WS203]
- Student Research Training Program of Shandong University of TCM [2018090, 2018093]
- Shandong Co-Innovation Center of Classic TCM Formula
Introduction: Major depressive disorder (MDD) is a recurrent, devastating mental disorder, which affects >350 million people worldwide, and exerts substantial public health and financial costs to society. Thus, there is a significant need to discover innovative therapeutics to treat depression efficiently. Stress-induced dysfunction in the subtype of neuronal cells and the change of synaptic plasticity and structural plasticity of nucleus accumbens (NAc) are implicated in depression symptomology. However, the molecular and epigenetic mechanisms and stresses to the NAc pathological changes in depression remain elusive. Materials and methods: In this study, treatment group mice were treated continually with the chronic unpredictable mild stress (CUMS) until expression of depression-like behaviors were found. Depression was confirmed with sucrose preference, novelty-suppressed feeding, forced swimming, and tail suspension tests. We applied high-throughput RNA sequencing to assess microRNA expression and transcriptional profiles in the NAc tissue from depression-like behaviors mice and control mice. The regulatory network of mi RNAs/mRNAs was constructed based on the high-throughput RNA sequence and bioinformatics software predictions. Results: A total of 17 miRNAs and 10 mRNAs were significantly upregulated in the NM of CUMS-induced mice with depression-like behaviors, and 12 miRNAs and 29 mRNAs were downregulated. A series of bioinformatics analyses showed that these altered miRNAs predicted target mRNA and differentially expressed mRNAs were significantly enriched in the MAPK signaling pathway, GABAergic synapse, dopaminergic synapse, cytokine-cytokine receptor interaction, axon guidance, regulation of autophagy, and so on. Furthermore, dual luciferase report assay and qRT-PCR results validated the miRNA/mRNA regulatory network. Conclusion: The deteriorations of GABAergic synapses, dopaminergic synapses, neurotransmitter synthesis, as well as autophagy-associated apoptotic pathway are associated with the molecular pathological mechanism of CUMS-induced depression.
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