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MicroRNA-Messenger RNA Regulatory Network Mediates Disrupted TH17 Cell Differentiation in Depression.

Haiyang Wang1,2,3,4, Lanxiang Liu4,5, Xueyi Chen4,6

  • 1Key Laboratory of Psychoseomadsy, Stomatological Hospital of Chongqing Medical University, Chongqing, China.

Frontiers in Psychiatry
|April 22, 2022
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Summary

This study reveals that disrupted T-helper 17 cell differentiation, part of an abnormal inflammatory response, is key in major depressive disorder. These findings highlight potential biomarkers and therapeutic targets for depression.

Keywords:
CSDSTh17 cell differentiationdepressionmRNAsmiRNAs

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Area of Science:

  • Neuroscience
  • Immunology
  • Genetics

Background:

  • MicroRNA (miRNA)-messenger RNA (mRNA) regulatory networks are implicated in human depression, but their mechanisms are complex and poorly understood.
  • Identifying specific molecular pathways involved in depression pathogenesis is crucial for developing effective treatments.

Purpose of the Study:

  • To construct and analyze a miRNA-mRNA regulatory network in major depressive disorder.
  • To investigate the role of inflammatory responses, specifically T-helper 17 (Th17) cell differentiation, in depression.
  • To identify potential biomarkers and therapeutic targets for major depressive disorder.

Main Methods:

  • Data mining of miRNA and mRNA expression datasets (GSE81152, GSE152267, Netherlands Study of Depression and Anxiety, GSK-disease-specific target Identification Program, Janssen-Brain Resource Company study).
  • Construction of a miRNA-mRNA regulatory network and bioinformatics analysis.
  • Validation of key gene expression in a chronic social defeat stress (CSDS) mouse model using quantitative real-time polymerase chain reaction (qRT-PCR).

Main Results:

  • Identification of three differentially expressed miRNAs and 119 intersecting differentially expressed mRNAs.
  • Functional analysis revealed an abnormal inflammatory response, specifically disturbed Th17 cell differentiation, as the primary altered biological function.
  • qRT-PCR validated decreased expression of Th17 differentiation-related genes (IL17A, IL21, IL22, IL1β) and increased RORγt expression in CSDS mice exhibiting depressive and anxiety-like behaviors.

Conclusions:

  • An abnormal inflammatory response involving disturbed Th17 cell differentiation is a primary biological process in major depressive disorder.
  • The study provides potential biomarkers and therapeutic targets for major depressive disorder.
  • Novel insights into the pathogenesis of major depressive disorder are offered.