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Method Article
Here we demonstrate how our lab freezes HuES human embryonic stem cell lines.
Note: such a frozen aliquot at a concentration of 106 cells/ml is sufficient to resurrect a culture on a 10cm plate.
The technique we describe for freezing HuES cell lines works well for efficiently storing and resurrecting HuES cell lines and also any mammalian cell of interest. Freezing a small proportion of cells at each passage is an important consideration when working with hES cell lines, as karyotype abnormalities can arise and abnormal cells can quickly take over the line. Thus, having frozen splits at every passage in addition to large banks at certain passages is highly desirable.
Material Name | Type | Company | Catalogue Number | Comment |
---|---|---|---|---|
Name | Company | Catalog Number | Comments | |
HuES Medium | medium | For aq total of 651.5 ml, add: 500 ml KO-DMEM + 6.5 ml PenStrep + 6.5 ml L- Glut + 6.5 ml NEAA 6.5 ml + beta-mercaptoethanol 0.6ul (14.3 M stock) + 65 ml Serum Replacement + 65 ml Plasmanate + 0.65 ml bFGF2 (~10 ng/mL final) | ||
Freezing Medium | medium | 80% FCS (fetal calf serum) + 20% DMSO (dimethyl sulphoxide). Stored at 4C. |
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