Mesenchymal stem cell-derived exosomes based on Tongxinluo pretreatment and preparation method thereof
A technology of mesenchymal stem cells and exosomes, which is applied in the field of high-efficiency exosomes derived from mesenchymal stem cells and its preparation, can solve the problems of insignificant effects and achieve the effect of reducing the size of myocardial infarction and reducing post-myocardial infarction inflammation
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[0033] Preparation method of exosomes derived from mesenchymal stem cells:
[0034] The preparation method of exosomes derived from mesenchymal stem cells: the primary rat (Sprague-Dawley rat, 60-80g) BM-MSCs were isolated by the differential attachment method, and the BM-MSCs were subcultured and expanded to the 3rd-4th generation for later use. BM-MSCs complete medium (IMDM, Gibco, USA) was pretreated with 400 μg / mL Tongxinluo for 24 hours, and the cell medium was replaced with IMDM partial medium (without adding fetal bovine serum) to continue culturing. After 48 hours, the conditioned medium was collected and ultracentrifugation was used to separate the exosomes secreted by BM-MSCs pretreated with Tongxinluo (MSC TXL -Exo). The specific steps of the ultracentrifugation method include: after collecting the conditioned medium, centrifuge at 300g for 10min to remove cells; centrifuge at 2000g for 20min to remove cell debris; high-speed centrifuge at 16500g for 30min to remov...
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