Construction method of human umbilical cord mesenchyma stem cell
A quality stem cell and construction method technology, applied in the field of stem cell bank construction, can solve problems such as discarding and loss, and achieve the effects of small cell damage, simple and easy operation, and promising application.
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Embodiment 1
[0024] Construction of human umbilical cord mesenchymal stem cell bank:
[0025] (1) After confirming the safety of the human umbilical cord through strict testing procedures (ABO / Rh blood type testing, HLA typing testing, syphilis antibody testing, HIV immune testing, CMV antibody testing, hepatitis B antigen antibody testing, etc.), the buffer solution Rinse repeatedly to remove residual blood, and cut it to about 1mm with a sterile knife 3 -1.5mm 3 small pieces;
[0026] (2) Take 10ml of small fragments, put them in a 50ml centrifuge tube, add 10ml of 0.05% collagenase, and digest at 37°C for 1 hour to obtain the digested mixture;
[0027] (3) Add phosphate buffer (PH=7.2-7.4) to the digested mixture until it fills the 50ml centrifuge tube, mix well, and centrifuge at 600g for 15min;
[0028] (4) Discard the supernatant, add 20ml of phosphate buffer (PH=7.2-7.4), resuspend the precipitate, pass through a 200-mesh sieve, collect the filtrate, centrifuge at 450g for 10min,...
Embodiment 2
[0031] Construction of human umbilical cord mesenchymal stem cell bank:
[0032] (1) After confirming the safety of the human umbilical cord through strict testing procedures (ABO / Rh blood type testing, HLA typing testing, syphilis antibody testing, HIV immune testing, CMV antibody testing, hepatitis B antigen antibody testing, etc.), the buffer solution Rinse repeatedly to remove residual blood, and cut it to about 1mm with a sterile knife 3 -1.5mm 3 small pieces;
[0033] (2) Take 10ml of small fragments, put them in a 50ml centrifuge tube, add 20ml of 0.1% collagenase, and digest at 37°C for 2 hours to obtain the digested mixture;
[0034] (3) Add phosphate buffer (PH=7.2-7.4) to the digested mixture until it fills the 50ml centrifuge tube, mix well, and centrifuge at 600g for 15min;
[0035] (4) Discard the supernatant, add 20ml of phosphate buffer (PH=7.2-7.4), resuspend the precipitate, pass through a 200-mesh sieve, collect the filtrate, centrifuge at 450g for 10min,...
Embodiment 3
[0038] Construction of human umbilical cord mesenchymal stem cell bank:
[0039] (1) After confirming the safety of the human umbilical cord through strict testing procedures (ABO / Rh blood type testing, HLA typing testing, syphilis antibody testing, HIV immune testing, CMV antibody testing, hepatitis B antigen antibody testing, etc.), the buffer solution Rinse repeatedly to remove residual blood, and cut it to about 1mm with a sterile knife 3 -1.5mm 3 small pieces;
[0040] (2) Take 10ml of small fragments, put them in a 50ml centrifuge tube, add 30ml of 0.2% collagenase, and digest at 37°C for 3h to obtain the digested mixture;
[0041] (3) Add phosphate buffer (PH=7.2-7.4) to the digested mixture until it fills the 50ml centrifuge tube, mix well, and centrifuge at 600g for 15min;
[0042] (4) Discard the supernatant, add 20ml of phosphate buffer (PH=7.2-7.4), resuspend the precipitate, pass through a 200-mesh sieve, collect the filtrate, centrifuge at 450g for 10min, and ...
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