Circ_0001825 promotes osteogenic differentiation in human-derived mesenchymal stem cells via miR-1270/SMAD5 axis

Area of Science:

• Molecular Biology
• Cell Biology
• Biochemistry

Background:

• Circular RNAs (circRNAs) are increasingly implicated in the pathogenesis of osteoporosis (OP).
• The specific role of circ_0001825 in OP remains largely unexplored.
• This study investigates the function and mechanism of circ_0001825 in OP using human-derived mesenchymal stem cells (hMSCs).

Purpose of the Study:

• To elucidate the role of circ_0001825 in regulating osteogenic differentiation of hMSCs.
• To identify the molecular mechanism underlying circ_0001825's function in OP.
• To explore the potential of circ_0001825 as a therapeutic target for osteoporosis.

Main Methods:

• Quantitative real-time PCR and Western blotting were used to assess gene and protein expression.
• Osteogenic differentiation was evaluated by ALP activity, Alizarin Red staining, and osteogenesis-related markers.
• Cell viability, apoptosis, and molecular interactions (e.g., dual-luciferase reporter assay) were analyzed.

Main Results:

• Circ_0001825 expression was downregulated in OP patients and osteogenic-induced hMSCs.
• Circ_0001825 knockdown impaired hMSC viability and osteogenic differentiation; overexpression had opposite effects.
• A feedback loop involving circ_0001825, miR-1270, and SMAD5 was identified, with miR-1270 targeting SMAD5.

Conclusions:

• Circ_0001825 promotes hMSC viability and osteogenic differentiation through the miR-1270/SMAD5 axis.
• Circ_0001825 plays a significant role in the pathogenesis of osteoporosis.
• Circ_0001825 represents a potential therapeutic target for treating osteoporosis.