In-vitro efficient preparation method and application of mesenchymal stem cells derived from human inducible pluripotent stem cells
A technology of pluripotent stem cells and mesenchymal stem cells, applied in the field of high-efficiency preparation of mesenchymal stem cells in vitro, can solve the problems of long differentiation cycle, low efficiency and complicated differentiation operation of mesenchymal stem cells
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Embodiment 1
[0028] Example 1: Culture of human induced pluripotent stem cells.
[0029] 1. GFR matrigel plating: according to the GFR matrigel (Corning) instruction manual, after diluting with DMEM-F12 medium, transfer to a six-well cell culture plate (1mL / well) with a pipette, and transfer to 37°C cell culture box incubate for 1 hour for later use;
[0030] 2. Digestion of human induced pluripotent stem cells: According to the Dispase enzyme product manual (StemCell Technology), human induced pluripotent stem cells (hiPSCs) were digested at 37°C, 5% CO 2 Incubate and digest in a cell incubator for 5 minutes to single cells, resuspend in 5 mL of DMEM-F12 medium and pipette to single cells with a 10 mL pipette, then centrifuge (at room temperature, 300g for 5 minutes), then maintain with 3 mL of human pluripotent stem cells The above hiPSCs were resuspended in medium (Gibco E8 medium, with a final concentration of 10 nM Y-27632 added) and counted for later use.
[0031] Inoculation of hu...
Embodiment 2
[0032] Example 2: Differentiation of human induced pluripotent stem cells into mesenchymal stem cells.
[0033] 1. Preparation of hiPSCs-to-MSCs-inducing differentiation medium: prepare in advance the induction-differentiation basal medium (3% fetal bovine serum, DMEM-F12 medium, 5nM Y-27632), in which the experimental group adds corresponding small chemical molecules (PCI- 24781, EPZ011989, J147, UNC1999, TG101348, CUDC-101, MS-275, BI 2536, LLY-507, Ginkgolide C, BI-7273, CPI-637, OTX015, UNC1215, EPZ6438, LBH589, GSK126, UNC0379, SP2 (+)-JQ-1, PFI-3, UNC669, CPI-455, OICR-9429, MS023, AZD5153, EED226), the final concentration was 10nM / mL, and the control group was the basal medium for inducing differentiation (without adding chemical small molecular).
[0034] 2. Cell treatment: Observe the morphology and density of hiPSCs under a microscope. When the cells grow into small clones, add the original old human pluripotent stem cell maintenance medium (Gibco E8 medium, and add...
Embodiment 3
[0040] Example 3: In vitro functional identification of mesenchymal stem cells (hiPSC-MSCs) produced by differentiation of human induced pluripotent stem cells.
[0041] 1. Adipogenic, osteogenic and chondrogenic differentiation of hiPSC-MSCs in vitro: according to 6×10 4 Cells / well were seeded in six-well cell-adherent culture plates (Corning), and when hiPSC-MSCs grew adherently until the cell confluence reached 70%-80%, the hiPSC-MSCs maintenance medium was discarded and the in vitro directional induction and differentiation were performed as follows.
[0042] (1) In vitro induced adipogenic differentiation culture system: After discarding the mesenchymal stem cell maintenance medium (DMEM-F12 medium, adding 10% fetal bovine serum, 10ng / ml bFGF, 4ng / ml EGF), replace Stem Cell company The MensenCult adipogenic differentiation medium was replaced with a fresh above-mentioned adipogenic differentiation medium every 3.5 days, and the culture continued until the 18th day. The d...
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