Chinese Journal of Tissue Engineering Research ›› 2017, Vol. 21 ›› Issue (18): 2828-2833.doi: 10.3969/j.issn.2095-4344.2017.18.007

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Effect of low-frequency pulsed electromagnetic fields on proliferation and osteogenic ability of human adipose-derived stem cells in a three-dimensional scaffold

Chen Yu-xiong1, Chen Xian-zhe1, Ni Meng-shan1, Guo Wen-jie1, Tian Jing2
  

  1. 1The Second Clinical Medical College, Southern Medical University, Guangzhou 510282, Guangdong Province, China; 2Orthopedics Center, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, Guangdong Province, China
  • Received:2017-04-01 Online:2017-06-28 Published:2017-07-07
  • Contact: 田京,教授,副主任医师,硕士生导师,南方医科大学附属珠江医院骨科中心,广东省广州市 510282
  • About author:Chen Yu-xiong, the Second Clinical Medical College, Southern Medical University, Guangzhou 510282, Guangdong Province, China
  • Supported by:

    the Scientific Innovative Culture Fund for the Undergraduate in Guangdong Province, No. pdjh2016b0104; the Scientific Research Plan of Guangdong Province, No. 2013B021800312

Abstract:

BACKGROUND: Nowadays increasing experimental findings have proved that the low-frequency pulsed electromagnetic fields (LPEMF) can induce osteogenic differentiation of a variety of stem cells in the two-dimensional scaffold. However, little is reported on the LPEMF effect on the proliferation and osteogenic differentiation of stem cells in the three-dimensional scaffold.
OBJECTIVE: To investigate the effect of LPEMF on the proliferation and osteogenic differentiation of human adipose-derived stem cells (hASCs) in the 3D Insert-PCL scaffold.
METHODS: Passage 3 hASCs were directly cultured in the 3D Insert-PCL scaffolds followed by LPEMF (50 Hz, 1 mT) exposure, 2 hours per day, for continuous 14 days (experimental group) or no intervention (control group). After 7 days of culture, Live/Dead staining was used to observe cell survival. After 1, 3, 5, 7 days of culture, MTT assay was used to detect cell proliferation. After 7 and 14 days of culture, the osteogenic differentiation of hASCs was assessed through the alkaline phosphatase (ALP) staining and qRT-PCR.
RESULTS AND CONCLUSION: Live/dead cell staining proved that the hASCs had a good growth in the 3D Insert-PCL scaffolds as well as a high survival rate. The absorbance values of hASCs in the two groups were increased gradually with time, and the absorbance value in the experimental group was significantly higher than that in the control group at 1 and 3 days after culture (P < 0.05). The ALP activity in the experimental group was stronger than that in the control group at 7 and 14 days after culture. qRT-PCR findings showed that at 7 days after culture, the mRNA levels of ALP and type I collagen were significantly higher in the experimental group than the control group (P < 0.01), while at 14 days after culture, the mRNA levels of osteopontin, Runt-related transcription factor, ALP and type I collagen were significantly higher in the experimental group than the control group (P < 0.05). To conclude, the LPEMF exposure can promote the proliferation and osteogenic differentiation of hASCs cultured on the the 3D Insert-PCL scaffold.

Key words: Electromagnetic Fields, Stem Cells, Cell Proliferation, Tissue Engineering

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