XU Yang 1,2,3 , WANG Qian 1,2,3 , WANG Xiangxiu 1,3 , XIANG Xiaona 1,2,3 , PENG Jialei 1,2 , ZHANG Jiangyin 1,2,3 , HE Hongchen 1,2,3
  • 1. Rehabilitation Medicine Centre, West China Hospital of Sichuan University, Chengdu 610041, P. R. China;
  • 2. West China School of Medicine, Sichuan University, Chengdu 610041, P. R. China;
  • 3. Rehabilitation Medicine Key Laboratory of Sichuan Province, West China Hospital of Sichuan University, Chengdu 610041, P. R. China;
HE Hongchen, Email: hxkfhhc@126.com
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The study aims to explore the effect of mesenchymal stem cells-derived exosomes (MSCs-Exo) on staurosporine (STS)-induced chondrocyte apoptosis before and after exposure to pulsed electromagnetic field (PEMF) at different frequencies. The AMSCs were extracted from the epididymal fat of healthy rats before and after exposure to the PEMF at 1 mT amplitude and a frequency of 15, 45, and 75 Hz, respectively, in an incubator. MSCs-Exo was extracted and identified. Exosomes were labeled with DiO fluorescent dye, and then co-cultured with STS-induced chondrocytes for 24 h. Cellular uptake of MSC-Exo, apoptosis, and the protein and mRNA expression of aggrecan, caspase-3 and collagenⅡA in chondrocytes were observed. The study demonstrated that the exposure of 75 Hz PEMF was superior to 15 and 45 Hz PEMF in enhancing the effect of exosomes in alleviating chondrocyte apoptosis and promoting cell matrix synthesis. This study lays a foundation for the regulatory mechanism of PEMF stimulation on MSCs-Exo in inhibiting chondrocyte apoptosis, and opens up a new direction for the prevention and treatment of osteoarthritis.

Citation: XU Yang, WANG Qian, WANG Xiangxiu, XIANG Xiaona, PENG Jialei, ZHANG Jiangyin, HE Hongchen. Effect of pulsed electromagnetic fields on mesenchymal stem cell-derived exosomes in inhibiting chondrocyte apoptosis. Journal of Biomedical Engineering, 2023, 40(1): 95-102. doi: 10.7507/1001-5515.202209053 Copy

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