MicroRNA-16, via FGF2 Regulation of the ERK/MAPK Pathway, Is Involved in the Magnesium-Promoted Osteogenic...

Area of Science:

• Biomedical research
• Stem cell biology
• Molecular biology

Background:

• MicroRNAs (miRNAs) are crucial regulators of cell differentiation.
• Osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) is vital for bone tissue healing.
• The role of miRNAs in magnesium chloride (MgCl2)-induced osteogenic differentiation remains underexplored.

Purpose of the Study:

• To investigate the mechanism by which miRNAs regulate MgCl2-induced osteogenic differentiation of BMSCs.
• To elucidate the specific role of miR-16 in this process.
• To identify the molecular targets and signaling pathways involved.

Main Methods:

• Bone marrow mesenchymal stem cells (BMSCs) were treated with MgCl2.
• Levels of miR-16, FGF2, p-p38, and p-ERK were measured.
• miR-16 mimics and FGF2 inhibitors were used to modulate gene expression.
• Luciferase reporter assays were performed to confirm target binding.
• Western blotting and quantitative real-time PCR were employed for analysis.

Main Results:

• MgCl2 treatment decreased miR-16 levels while increasing FGF2, p-p38, and p-ERK, promoting osteogenic differentiation.
• Overexpression of miR-16 reversed these MgCl2-induced effects.
• miR-16 directly targets the 3'UTR of FGF2 mRNA.
• Downregulation of FGF2 inhibited MgCl2-induced signaling pathway activation and osteogenic differentiation.
• Overexpression of miR-16 attenuated MgCl2 effects, which were reversed by FGF2 overexpression.

Conclusions:

• miR-16 acts as a negative regulator of MgCl2-induced osteogenic differentiation in BMSCs.
• The mechanism involves targeting FGF2, thereby inhibiting the ERK/MAPK signaling pathway.
• These findings offer insights into potential therapeutic strategies for bone regeneration.