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Low-Magnitude, High-Frequency Vibration Promotes Osteogenic Differentiation via Intensifying miRNA-335-5p Expression
Abstract:
Certain mechanical stimuli-particularly low-magnitude, high-frequency vibration-could induce bone marrow stem cell osteogenic differentiation and promote bone formation via Wnt signaling pathway, although the molecular mechanism is still unclear. In this study, we found that miR-335-5p is significantly upregulated after low-magnitude, high-frequency vibration, which suppresses the expression of the Wnt signaling inhibitor Dickkopf-related protein 1. Inhibition of miR-335-5p greatly reduced the osteogenic differentiation. Furthermore, the increase of miR-335-5p level was also confirmed in vivo after LMHF vibration in rabbit. Our study elucidates the prominent role of miRNAs that links the LMHF vibration and osteogenic differentiation.
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