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[miR-124-1 promotes neural differentiation of rat bone marrow mesenchymal stem cells]
Yan Zhou1, Kui-Sheng Chen, Jian-Bo Gao
1Department of Radiology, First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, China.
Objective:
To study the effects of miR-124-1 on neuronal differentiation of rat bone marrow mesenchymal stem cells (MSCs).
Methods:
MSCs cells were assigned into three groups: control (uninfected and untransfected), miR-124-1+ (infected with miR-124-1), and miR-124-1- (transfected with Anti-rno-miR-124* Inhibitor). MSCs were induced by β-mercaptoethanol (β-ME) to differentiate into neurons. The fluorescence expressed by infected MSCs was observed under an inverted fluorescence microscope. MTT method was used to measure cell survival rate after transfection or infection. Immunocytochemistry, RT-PCR and Western blot methods were used to detect the expression of β3 tubulin, MAP-2 and GFAP 6 days after β-ME induction.
Results:
The expression of miR-124-1 in the miR-124-1+ group was significantly higher 2 days after infection of lentivirus vector compared with the control group (P<0.01). In the miR-124-1- group, the cell survival rate and the miR-124-1 expression level decreased significantly 24 hrs after transfection of anti-rno-miR-124* inhibitor (P<0.01). After 6 days of β-ME induction, the protein and mRNA expression levels of β3 tubulin and MAP-2 in the miR-124-1+ group were much higher than the other two groups (P<0.01); while the expression levels of β3 tubulin and MAP-2 in the miR-124-1-group were lower than the control group (P<0.01). The expression of GFAP in the three groups was weak (<1%).
Conclusions:
miR-124 might promote neuronal differentiation of rat MSCs.
Insights
MicroRNA-124 (miR-124) promotes the neuronal differentiation of rat mesenchymal stem cells (MSCs). Upregulating miR-124 enhances neuronal markers, while inhibiting it reduces their expression, suggesting miR-124
Area of Science:
- Stem cell biology
- Neuroscience
- Molecular biology
Background:
- Mesenchymal stem cells (MSCs) are multipotent cells with potential applications in regenerative medicine.
- Neuronal differentiation is a complex process crucial for developing treatments for neurological disorders.
- MicroRNAs (miRNAs) are key regulators of gene expression, influencing cell differentiation pathways.
Purpose of the Study:
- To investigate the role of miR-124 in the neuronal differentiation of rat bone marrow-derived MSCs.
- To determine if manipulating miR-124 levels affects the expression of neuronal markers.
Main Methods:
- Rat MSCs were divided into three groups: control, miR-124 overexpressing (miR-124+), and miR-124 inhibited (miR-124-).
- Cells were induced to differentiate into neurons using beta-mercaptoethanol (β-ME).
- Cell survival was assessed using MTT assays. Neuronal differentiation was evaluated by detecting the expression of β3 tubulin, MAP-2, and GFAP via immunocytochemistry, RT-PCR, and Western blot.
Main Results:
- miR-124 levels were significantly increased in the miR-124+ group and decreased in the miR-124- group post-manipulation.
- Overexpression of miR-124 (miR-124+) led to significantly higher mRNA and protein levels of neuronal markers β3 tubulin and MAP-2.
- Inhibition of miR-124 (miR-124-) resulted in significantly lower expression of β3 tubulin and MAP-2 compared to controls. GFAP expression remained low across all groups.
Conclusions:
- miR-124 plays a significant role in promoting the neuronal differentiation of rat MSCs.
- Upregulation of miR-124 enhances the expression of key neuronal differentiation markers.
- These findings suggest miR-124 as a potential therapeutic target for promoting neurogenesis.
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