miRNA-467b inhibits Th17 differentiation by targeting eIF4E in experimental autoimmune encephalomyelitis
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Updated: Nov 16, 2025
Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes
Published on: September 26, 2013
Ting Wu1, Yunxuan Lei2, Shuxin Jin2
1Department of Immunology and Microbiology, Shanghai JiaoTong University School of Medicine, Shanghai Institute of Immunology, Shanghai 200025, China; RenJi(North) Hospital Shanghai Jiaotong University School of Medicine, Shanghai 200135, China.
Abstract:
Multiple sclerosis (MS) and its animal model experimental autoimmune encephalomyelitis (EAE) are neuroinflammatory autoimmune diseases characterized by the axonal loss, demyelination, and neurodegeneration of the central nervous system. Overactivation of CD4+ T cells, especially the migration of the Th1 and Th17 subsets into the central nervous system (CNS), leads to the secretion of inflammatory mediators and destruction of the contact between neurons and activated macrophages, which can then result in a series of neurocognitive and motor deficits. In this study, we intended to explore the role of miRNA-467b in regulating Th cell development in EAE. We found that the level of miRNA-467b was decreased and eukaryotic initiation factor 4 F (eIF4E) was increased in lymph nodes and the CNS at EAE peak. eIF4E was confirmed as the direct target of miRNA467b. Overexpression of miRNA-467b could suppress a percentage of CD4+ IL-17+ cells in EAE CD4 + T cells in vitro. In addition, we also identified miRNA-467b, which could suppress Th17 cell differentiation by targeting eIF4E in vitro. Furthermore, injecting miRNA-467b mimics into the caudal vein of EAE mice contributed to less inflammation in the peripheral lymphoid organs and CNS and alleviated disease severity. Taken together, our findings imply that miRNA-467b inhibits the differentiation and function of Th17 cells by targeting eIF4E, thereby alleviating EAE.
Insights
MicroRNA-467b suppresses T-helper 17 cell differentiation by targeting eIF4E, alleviating experimental autoimmune encephalomyelitis (EAE) severity. This finding offers a potential therapeutic strategy for neuroinflammatory diseases like multiple sclerosis (MS).
Area of Science:
- Neuroimmunology
- Molecular Biology
- Autoimmune Diseases
Background:
- Multiple sclerosis (MS) and experimental autoimmune encephalomyelitis (EAE) are characterized by central nervous system inflammation, demyelination, and neurodegeneration.
- Overactivated CD4+ T cells, particularly Th1 and Th17 subsets, drive neuroinflammation and subsequent neurological deficits in EAE.
- Understanding the regulatory mechanisms of T-cell differentiation is crucial for developing MS therapies.
Purpose of the Study:
- To investigate the role of microRNA-467b (miRNA-467b) in regulating T-helper (Th) cell development in the context of EAE.
- To elucidate the molecular targets and functional consequences of miRNA-467b in EAE pathogenesis.
Main Methods:
- Quantitative analysis of miRNA-467b and eukaryotic initiation factor 4F (eIF4E) levels in EAE mice.
- In vitro studies involving overexpression of miRNA-467b in CD4+ T cells to assess its effect on Th17 differentiation.
- In vivo administration of miRNA-467b mimics in EAE mice to evaluate therapeutic potential.
Main Results:
- miRNA-467b levels were decreased, while eIF4E levels were increased in the lymph nodes and CNS during peak EAE.
- eIF4E was identified as a direct target of miRNA-467b.
- Overexpression of miRNA-467b suppressed CD4+ IL-17+ cell populations and Th17 cell differentiation in vitro.
- Administration of miRNA-467b mimics reduced inflammation and alleviated disease severity in EAE mice.
Conclusions:
- miRNA-467b acts as a negative regulator of Th17 cell differentiation and function by targeting eIF4E.
- Restoring miRNA-467b levels can ameliorate EAE, suggesting its therapeutic potential for MS and related neuroinflammatory conditions.
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