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Let-7a-5p targets MAP3K1 to regulate the MAPK signaling pathway in a depression model
Shuailong Fei1, Qingyun Li1, Jinchen Xiang2
1School of Basic Medical Sciences, Hebei Key Laboratory for Chronic Diseases, Tangshan Key Laboratory for Preclinical and Basic Research on Chronic Diseases, North China University of Science and Technology, 21 Bohai Road, Tang'shan, Hebei, 063210, PR China.
Neurochemistry International
|May 14, 2026
Summary
MicroRNAs, specifically let-7a-5p, are implicated in depression by targeting MAP3K1 and activating the MAPK pathway. This molecular mechanism influences inflammation, apoptosis, and synaptic plasticity, offering new therapeutic insights for depression.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Depression involves complex biological dysregulation, including inflammation, apoptosis, and synaptic plasticity.
- MicroRNAs (miRNAs) are increasingly recognized for their role in depression pathogenesis via post-transcriptional gene regulation.
Purpose of the Study:
- To investigate the role of let-7a-5p as a hub miRNA in depression.
- To elucidate the molecular mechanisms by which let-7a-5p influences depression-related cellular processes.
Main Methods:
- Bioinformatics analysis to identify hub miRNAs.
- Target prediction and dual-luciferase reporter assays to confirm miRNA targets.
- Western blot analysis to assess protein expression changes.
Main Results:
- let-7a-5p was identified as a key miRNA in depression and confirmed to target MAP3K1.
- Overexpression of let-7a-5p activated the MAP3K1-MAPK signaling pathway.
- MAPK activation led to significant alterations in inflammation, neuronal apoptosis, and synaptic plasticity markers.
Conclusions:
- let-7a-5p regulates depression-associated cellular functions by modulating the MAP3K1-MAPK signaling axis.
- This pathway influences inflammation, apoptosis, and synaptic plasticity, providing potential therapeutic targets for depression.
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