Title | Cryopreservation of human pluripotent stem cells in defined conditions |
Date Submitted | April 30, 2012 |
Submitted by - | Chen, Guokai (Guokai.chen@nih.gov) |
Adapted from - | Chen G., etc. In preparation |
Contributors - | Guokai Chen |
Affiliation(s) - | National Heart, Lung and Blood Institute |
Cryopreservation is a critical step to preserve the integrity of human pluripotent stem cells, however, the recovery after cryopreservation is inefficient with traditional enzymatic methods, such as dispase and collagenase. Due to the technical difficulties of cryopreservation, regular passaging methods are often different from harvest methods used in cryopreservation. Even though individualization with ROCK inhibitor treatment has been successfully used to harvest cells in both passaging and cryopreservation, it is still desirable to have a method that could preserve stem cells without drug treatment. At the same time, serum or other animal products are often used in cryopreservation, which could potentially compromise the future applications of the cells. We developed an enzyme-free method to passage and cryopreserve pluripotent stem cells in chemically defined medium. High recovery efficiency could be achieved in dependent of ROCK inhibitor treatment.
Here we describe how to cryopreserve hESCs and hiPSCs in E8 medium with EDTA dissociation method. For low passage and stock lines, we usually add 10 µM Y27632 to further insure the cryopreservation efficiency.
Cell Materials
Human ESCs
Human iPSCs
Cell culture media
EDTA/PBS (1000ml)
Ingredient | Amount | Company | Catalog# |
---|---|---|---|
PBS | 500ml | Life Technology | 14190-250 |
0.5M EDTA | 0.5ml | K.D. Biomedical | RGF3130 |
NaCl | 0.9g | Sigma | 5886 |
Medium Reagents
Ingredient | Company | Catalog# |
---|---|---|
DMEM/F12 | Life Technology | 11330 |
L-Ascorbic acid 2-phosphate magnesium salt | Sigma | A8960 |
Sodium Selenite | Sigma | 5886 |
Sodium Chloride | Sigma | S5886 |
Holotransferrin | Sigma | T0665 |
Basic FGF | Peprotech | 100-18B |
TGFß1 | R&D Systems | 240-B/CF |
Insulin | Sigma | I9278 |
Hydrocortisone | Sigma | H0396 |
Sodium Butyrate | Sigma | B5587 |
STUFF
Inverted microscope (i.e., Nikon TE or Olympus IX or Zeiss Promo Vert) |
Biosafety cabinet for cell culture |
CO2 incubator with controlling and monitoring system for CO2, humidity and temperature |
Cell culture disposables: Tissue culture dishes, centrifuge tubes, pipettes, pipette tips, cell strainer etc. |
Low cell survival
This page was last modified on October 18, 2012