Amniotic membrane mesenchymal stem cell release molecule (ASRM) as well as preparation method and application of ASRM
A sheep stem and amniotic membrane technology, applied in the field of bioengineering, can solve the problems of long doubling time and poor multi-differentiation potential of AMSCs cells
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[0055] A kind of preparation method of sheep dry element and freeze-dried powder thereof, comprises the following steps:
[0056] (1) AMSCs culture and expansion
[0057]Under sterile conditions, the amniotic membrane was removed from the placenta of normal full-term healthy infants delivered on the operating table, immediately soaked in α-MEM basal culture medium containing 200 U / ml penicillin and 200 μg / ml streptomycin and temporarily stored at 4°C. Primary cultures were performed within 12 hours. The amniotic membrane was taken out in a cell operation sterile bench, washed with phosphate buffered saline (PBS) containing 200 U / ml penicillin and 200 μg / ml streptomycin, removed blood, transferred to a 5ml EP tube and shredded with ophthalmic scissors. Then mix multiple tubes into a 50ml centrifuge tube, add 0.5mg / ml Trypsin (containing 0.02% EDTA) at a volume ratio of 1:10, shake in a sterile constant temperature shaker at 37°C at 200rpm / min for 30mins, centrifuge at 2000rpm ...
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