Chinese Journal of Clinical Anatomy ›› 2022, Vol. 40 ›› Issue (3): 292-296.doi: 10.13418/j.issn.1001-165x.2022.3.09

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Study on the reliability of differential hypervelocity centrifugation for isolation of mesenchymal stem cells derived exosomes from different species

Zhao Renli1,2, Lai Guohua1, Wu Jiachang1, Wu Mingjie1, Zhuang Weida1, Ouyang Jun3*, Sang Hongxun1,2*   

  1. 1. Department of Orthopedics, Shenzhen Hospital of Southern Medical University, Shenzhen 518100, China; 2. The Third Clinical Medical College of Southern Medical University, Guangzhou 510630, China; 3. Department of Human Anatomy, Guangdong Provincial Key Laboratory of Medical Biomechanics, Southern Medical University, Guangzhou 510515, China
  • Received:2021-05-31 Online:2022-05-25 Published:2022-05-31

Abstract: Objective To isolate and culture the mouse and rat bone marrow mesenchymal stem cells (BMSCs), purify the exosome by differential hypervelocity centrifugation, identify the morphology and biological function of exosomes and analyze the reliability of this method for exosome isolation. Methods BMSCs of 3-5 passages were differentiated by osteogenic, adipogenic and chondrogenic induction and then stained. The surface markers of BMSCs were identified by flow cytometry. Exosomes were identified by transmission electron microscopy, nanoparticle tracer analysis and Western Blot. Results    Stained after osteogenic, adipogenic and chondrogenic induction, BMSCs were proved to have the unique potential of multidirectional differentiation. Flow cytometry results showed that mouse and rat BMSCs expressed the surface antigen of stem cells. Under transmission electron microscopy, exosomes showed a typical goblet structure with an average particle size of 107 nm and 152 nm. Western Blot results showed that the exosomes expressed landmark proteins. Conclusions Mouse and rat BMSCs are successfully isolated and cultured. Meanwhile, differential hypervelocity centrifugation is suitable and reliable to isolate and purify exosomes from BMSCs.

Key words: Bone marrow mesenchymal stem cells,  Exosomes; Differential hypervelocity centrifugation

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