Differentiation culture medium and preparation method of oligodendrocyte progenitor cells
A technology of precursor cells and culture medium, applied in the field of preparation of culture medium and oligodendrocyte precursor cells, can solve the problems of complicated and lengthy steps, increase the risk of OPs, limit the application of OPs, etc., and achieve the enhancement of cell viability and differentiation process. Controllable and improved antioxidant effect
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Embodiment 1
[0049] Example 1: Pretreatment of bone marrow mesenchymal stem cells (BMSC)
[0050] 1. Material source:
[0051] Sources of bone marrow include, but are not limited to, 30-day-old Sprague-Dawley rats, or adults between 18-40 years old.
[0052] 2. Dilute 1ml Sprague-Dulle rat or adult bone marrow with 9ml CTS Stem Pro Medium, add the diluted bone marrow to a 10cm cell culture dish that has been modified to be suitable for adherent cell culture. The day of adherence culture was defined as the first day (D0) of the differentiation process of oligodendrocyte precursor cells.
[0053] 3. After 48 hours, remove the medium in the cell culture dish, wash off the non-adherent cells with DPBS, add 10ml CTSStem Pro Medium, and then replace the CTS Stem Pro Medium every 72 hours to continue the culture.
[0054] 4. When cultured to D6~D7, bone marrow mesenchymal stem cell (BMSC) clones can be observed in the culture dish; when cultured to D8~D10, aspirate the medium and rinse the non-adherent ce...
Embodiment 2
[0065] Example 2: Differentiation of BMSC into neural stem cells
[0066] 1. Preparation of neural stem cell culture medium
[0067] Configured with a final concentration of 1% CTS GlutaMAX, 2% CTS B27, 40ng / ml GMP bFGF, 40ng / ml GMP EGF, 20ng / ml GMP IGF-1 and 1% P / S Advanced DMEM / F12 medium.
[0068] 2. When BMSC is passed between the 3rd and 10th generation (preferably D15), digest BMSC with CTS Tryple Select, centrifuge and resuspend BMSC with neural stem cell culture medium, and then resuspend BMSC with 1×10 4 Cells / cm 2 The density is inoculated in Ultra Non-adherent culture in 6-well plates.
[0069] 3. Change the neural stem cell culture medium every 48h. As the culture time increases, the neural stem cells form neurospheres and are suspended in the neural stem cell culture medium. On the 5th to 7th day of non-adherent culture, the culture medium is centrifuged at 200g for 5min. Neural stem cells in the form of neurospheres.
Embodiment 3
[0070] Example 3: Identification of neural stem cells
[0071] Using bone marrow mesenchymal stem cells as a control, after dispersing the neurospheres on the 5th day of non-adherent culture described in Example 2, immunofluorescence technology was used to detect the content of cells that positively express Nestin and GFAP in the neurospheres and count them. figure 2 It can be seen that the amount of cells positively expressing Nestin and GFAP in the neurosphere of Example 2 exceeds 85%.
[0072] Experiments have proved that when the number of cells in the neurosphere described in Example 2 that positively express Nestin and GFAP is higher than 75%, the purity and differentiation efficiency of the oligodendrocyte precursor cells further differentiated by the neurosphere are higher.
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