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Updated: Feb 18, 2026
A Mouse Distraction Osteogenesis Model
Published on: November 14, 2018
MicroRNA-144-3p inhibits bone formation in distraction osteogenesis through targeting Connexin 43
Yu-Xin Sun1,2,3, Jin-Fang Zhang2,3, Jia Xu4
1Department of Orthopaedics and Traumatology, Bao-An District People's Hospital, Shenzhen, PR China.
Abstract:
Distraction osteogenesis (DO), one of effective therapies for bone regeneration, has been received more attention in recent years. However, the underlying mechanism remains elusive. Recently, microRNAs (miRNAs) have been reported to play important roles in regulating osteogenesis and bone formation. We therefore provided the hypothesis that miRNAs could involve in the DO-mediated bone regeneration. After successfully established the DO model of rats, a miRNA microarray was performed to find the differently expressed miRNAs in DO and control groups in this study. As one of the most downregulated miRNAs, miR-144-3p was found to be decreased during osteogenic differentiation in mesenchymal stem cells of rats (rBMSCs) and DO model. And miR-144-3p overexpression suppressed the osteogenesis while its inhibitor promoted osteogenesis. Furthermore, Connexin-43, an essential regulator for osteogenesis, was validated to be a novel target for miR-144-3p. Finally, miR-144-3p inhibitor modified MSCs promoted mineralization of distracted bone in rat DO model. In conclusion, miR-144-3p was found to regulate osteogenesis and inhibition of miR-144-3p resulted in acceleration of mineralization of DO, which not only give clues to understanding the mechanism of DO but also provide a potential therapeutic target in clinical practice.
Insights
MicroRNAs (miRNAs) are key to bone regeneration. Inhibiting miR-144-3p accelerates distraction osteogenesis (DO) mineralization, offering a potential therapeutic target for bone repair.
Area of Science:
- Molecular Biology
- Regenerative Medicine
- Biomedical Engineering
Background:
- Distraction osteogenesis (DO) is an effective bone regeneration therapy, but its mechanisms are not fully understood.
- MicroRNAs (miRNAs) are increasingly recognized for their role in regulating osteogenesis and bone formation.
- The involvement of miRNAs in DO-mediated bone regeneration requires further investigation.
Purpose of the Study:
- To investigate the role of miRNAs in distraction osteogenesis (DO).
- To identify specific miRNAs involved in the DO process.
- To explore the therapeutic potential of targeting miRNAs for enhanced bone regeneration.
Main Methods:
- Establishment of a rat distraction osteogenesis (DO) model.
- miRNA microarray analysis to identify differentially expressed miRNAs.
- In vitro studies using rat bone marrow mesenchymal stem cells (rBMSCs) to assess miR-144-3p function.
- In vivo validation of miR-144-3p inhibition in the rat DO model.
Main Results:
- miR-144-3p was significantly downregulated in the DO model and during osteogenic differentiation of rBMSCs.
- Overexpression of miR-144-3p suppressed osteogenesis, while its inhibition promoted it.
- Connexin-43 was identified as a direct target of miR-144-3p.
- Inhibition of miR-144-3p in mesenchymal stem cells (MSCs) enhanced bone mineralization in the rat DO model.
Conclusions:
- miR-144-3p plays a regulatory role in osteogenesis.
- Inhibition of miR-144-3p accelerates bone mineralization during distraction osteogenesis (DO).
- Targeting miR-144-3p presents a potential therapeutic strategy for improving bone regeneration in clinical settings.
