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Updated: Apr 12, 2026
Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells
Published on: April 16, 2012
MiR-125a targets effector programs to stabilize Treg-mediated immune homeostasis
11] State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200032, China [2] Joint Molecular Rheumatology Laboratory of the Institute of Health Sciences and Shanghai Renji Hospital, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, and Shanghai Jiaotong University School of Medicine, Shanghai 200025, China [3] Department of Genetics, Yale University School of Medicine, New Haven, Connecticut 06520, USA.
MicroRNA-125a (miR-125a) is crucial for immune balance in autoimmune diseases. Lowering miR-125a levels in T cells promotes inflammation and disease severity, highlighting its therapeutic potential.
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- Autoimmune diseases share common molecular pathways despite distinct clinical presentations.
- Dysregulation of microRNAs (miRNAs) is implicated in autoimmune pathogenesis.
Purpose of the Study:
- To investigate the role of miR-125a in autoimmune diseases.
- To determine the impact of miR-125a on regulatory T (Treg) cells and immune homeostasis.
Main Methods:
- Analysis of miR-125a levels in CD4(+) T cells from patients with systemic lupus erythematosus and Crohn's disease.
- Assessment of disease severity in miR-125a-deficient mouse models (colitis and experimental autoimmune encephalomyelitis - EAE).
- Genome-wide target analysis to identify miR-125a targets in effector T cells.
- Administration of a synthetic miR-125a analogue in EAE models.
Main Results:
- miR-125a was found to be downregulated in CD4(+) T cells of human autoimmune diseases and mouse models.
- miR-125a deficiency led to a shift from immune suppression to inflammation, exacerbating colitis and EAE.
- miR-125a was shown to suppress key effector T-cell factors, including Stat3, Ifng, and Il13.
- A synthetic miR-125a analogue demonstrated potential in restoring immune homeostasis in EAE models.
Conclusions:
- miR-125a plays a critical role in stabilizing Treg-mediated immune homeostasis.
- Restoring miR-125a levels may represent a novel therapeutic strategy for autoimmune diseases.
- miR-125a acts by suppressing effector T-cell functions, thereby maintaining immune balance.
