• 1. National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610041, P.R.China;
  • 2. Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P.R.China;
CHEN Xuening, Email: xchen6@scu.edu.cn; ZHI Wei, Email: zhiwei@swjtu.edu.cn
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This study investigated the early mechanical adaptability and osteogenic differentiation of mouse bone marrow mesenchymal stem cells (M-BMSCs) under micro-vibration stimulation (MVS). M-BMSCs were stimulated by MVS in vitro, cell proliferation, alkaline phosphatase (ALP) activity assay, and cytoskeleton were measured, and cell apoptosis was observed by flow cytometry. Early osteoblast-associated genes, runt-related transcription factor 2 (Runx2), Collagen Ⅰ (Col-Ⅰ) and ALP, were observed by RT-PCR and the activation of extracellular regulated protein kinases 1/2 (ERK1/2) was determined by Western blotting. The results showed that MVS had no significant effect on the proliferation of M-BMSCs. The early apoptosis was induced by mechanical stimulation (for one day), but the apoptosis was decreased after cyclic stimulation for 3 days. At the same time, MVS significantly accelerated the expression of F-actin protein in cytoskeleton, the synthesis of ALP and the ERK1/2 pathway, also up-regulated the expressions of Runx2, Col-Ⅰ and ALP genes. This study indicates that MVS could regulate cellular activity, alter early adaptive structure and finally promote the early osteogenic differentiation of M-BMSCs.

Citation: WU Jinjie, WU Yuehao, CHEN Xuening, ZHI Wei. Early stage mechanical adaptability and osteogenic differentiation of mouse bone marrow derived mesenchymal stem cell under micro-vibration stimulation environment. Journal of Biomedical Engineering, 2020, 37(1): 96-104. doi: 10.7507/1001-5515.201903056 Copy

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